Function Description of Softswitch

7/29/2019 Function Description of Softswitch

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Function Description of Softswitch

Softswitch

Issue 1.00

Date 2007-02-06

CONFIDENTIAL

HUAWEI TECHNOLOGIES CO., LTD.


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Issue 1.00 (2006-09-25) Huawei Technologies Proprietary Page 2 of 146

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The information in this document is subject to change without notice. Every effort has been made in thepreparation of this document to ensure accuracy of the contents, but all statements, information, andrecommendations in this document do not constitute the warranty of any kind, express or implied.
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About This Document

Author

Prepared by Liao zhi jun Date 2007-02-06

Reviewed by Lai Hai Bing Date 2007-02-06

Approved by Yang Jun Date 2007-02-06

Summary

This document provides the function description of Softswitch.


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History

Issue Details Date Author Approved by

1.00 Creation 2007-02-06 Liao zhi jun Yang Jun


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Contents

1 Function Description of MSOFTX3000.....................................................................................6

1.1 Teleservices ...................................................................................................................................................... 6

1.2 Supplementary services.................................................................................................................................. 11

1.3 Operator Determined Barring (ODB) services............................................................................................... 21

1.4 Value-Added services..................................................................................................................................... 22

1.5 Mobility management .................................................................................................................................... 33

1.6 Security management ..................................................................................................................................... 36

1.7 Subscriber data management.......................................................................................................................... 39

1.8 Handover functions ........................................................................................................................................ 40

1.9 Tone and announcement functions ................................................................................................................. 46

1.10 The MGW completes the load of an announcement file. Charging functions.............................................. 51

1.11 Protocol interface functions.......................................................................................................................... 63

1.12 Operation and maintenance functions .......................................................................................................... 74

1.13 Routing functions......................................................................................................................................... 831.14 Interconnection functions............................................................................................................................. 93

1.15 SSP functions ............................................................................................................................................. 105

1.16 Enhanced system functions ........................................................................................................................ 112

1.17 Lawful interception functions .................................................................................................................... 139

1.18 Bill gateway (iGWB) functions.................................................................................................................. 140

1.19 System reliability functions........................................................................................................................ 145


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1 Function Description of SoftswitchThis document aims to help readers better understand Softswitch functions and features. The

document will provide a general overview of major functions and features of softswitchsystem.

1.1 Teleservices

WMFD-010000

Function name: Teleservices

Description:

The teleservices include basic teleservices and supplementary services. And the basic

teleservices include speech service, bearer service and short message service.

Implemented node: VMSC/VLR, GMSC, and TMSC

Serve Network: GSM and UMTS

WMFD-010100

Function name: Speech service

Description:

The speech service is the basic function of telecom network, including telephony (TS 11),emergency call (TS 12) and emergency call for special service (such as 119 and 110).



WMFD-010101

Function name: Telephony (TS11)

Description:


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The operators provide the telephony service for the subscribers among PSTN, ISDN, andPLMN through the function.



WMFD-010102

Function name: Emergency call (TS12)

Description:

When the mobile subscribers press an emergency key or dial 112, the call is connected to the

answer phone notice equipment which will tell the subscribers how to call the emergencycenter. The subscribers can make the emergency calls even without SIM or USIM.

Implemented node: VMSC/VLR


WMFD-010103

Function name: Emergency call for special service

Description:

When dialing 119 (fire alarm center), 110 (mobster alarm center), 120 (first-aid center) and

122 (traffic accident center), the mobile subscribers access the nearest special service centers

based on the BTS where the subscribers are located. The above calls can generate the alarms,

and whether to charge for subscribers can be set as required.



WMFD-010200

Function name: Short Message Service (SMS)

Description:

The SMS includes Point-to-point (PTP) SMS, and point-to-multipoint SMS. Wherein, the

latter refers to SM cell broadcast service, and the former includes the following:

z WMFD-010201 Short message MO/PP (SMS-MO)

z WMFD-010202 Short message MT/PP (SMS-MT)

SM: The length of cell content transferred each time is rather short in the SMS. According to

the definition of relevant technical specifications (ETSI GSM 03.40 and ETSI GSM 03.41) in

current ETSI GSM, each PTP SM includes a maximum of 140 bytes. That is, 160 ASCIIcharacters or 70 Chinese words. But each broadcast SM includes a maximum of 82 bytes/page,

that is, 92 ASCII characters or 41 words, and a maximum of 15 pages macro broadcastmessages can be sent continuously. The point-to-multipoint SMS allows the subscribers to

send/receive the SM at any time. But the broadcast SMS allows the subscribers to receive the

public messages regularly and selectively.


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Service benefit:

For operators

z Increase the traffic and enhance ARPU value.

For subscribers -

z Receive/send the SM.

Requirements for peripheral network entities -

z The network should provide SMC equipment.

WMFD-010201Function name: Short message MO/PP(TS22)

Description:

This service provides the transmission of a short message from a user equipment to a messagehandling system (service center). After reception an acknowledgement message can be sent

back. There is an interworking between the PLMN and SMS Service Center (SMS-SC).



Service benefit:

For operators


For subscribers -

z Send the SM.


z The network should have SMC-SC.

WMFD-010202

Function name: Short message MT/PP(TS21)

Description:

This service provides the transmission of a short message from a message handling system(service center) to a user equipment. After reception an acknowledgement message is sent

back. There is an interworking between the PLMN and SMS Service Center (SMS-SC).



Service benefit:


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For operators


For subscribers -

z Receive the SM.


z The network should have SMC-SC.

WMFD-010300

Function name: GSM facsimile services

Description:

Refer to defined facsimile services that MSOFTX3000 supports GSM protocol specifications,including automatic facsimile services and alternate speech and facsimile service.

WMFD-010301

Function name: Alternate speech and facsimile group 3 (TS61)

Description:

Huawei MSOFTX3000 supports the alternate of G3 transparent digital facsimile and speech.

The rate can be 2.4kbps, 4.8kbps or 9.6kbps during the facsimile service.


Serve Network: GSM

Service benefit:

For operators -

z Provide GSM TS61 service.

For subscribers -

z Enjoy GSM TS61 service.


z Configure IWF equipment.

WMFD-010302

Function name: Automatic facsimile group 3 (TS62)

Description:

Most facsimiles adopt this mode. For GSM, currently Huawei MSOFTX3000 only supports

G3 transparent digital facsimile. The automatic facsimile group 3 can be compatible withseveral analog facsimile service (currently, the GSM analog facsimile is unavailable, and

current G3 facsimile is digital one).In addition, it only supports picture facsimile instead of

text facsimile, and does not support ECM correction mode.


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The rate can be 2.4kbps, 4.8kbps or 9.6kbps.


Serve Network: GSM

Service benefit:

For operators -

z Provide GSM TS62 service.

For subscribers -

z Enjoy GSM TS62 service.


z Configure IWF equipment.

WMFD-010500

Function name: GSM bearer services

Description:

Huawei MSOFTX3000 supports the following BS20 bearer services:

z WMFD-010501 Transparent asynchronous bearer services-3.1kHz audio, FixedNetwork User Rate can be 2.4/4.8/9.6kbps under the GSM.

z WMFD-010502 Transparent asynchronous bearer services-UDI, and under the GSM,Fixed Network User Rate is 2.4/4.8/9.6kbps, and the rate adaptation is V.110.

z WMFD-010503 Non-transparent asynchronous bearer services-3.1kHz audio, andunder the GSM, Fixed Network User Rate is 2.4/4.8/9.6kbps.

z WMFD-010504 Non-transparent asynchronous bearer services-UDI, and under theGSM, Fixed Network User Rate is 2.4/4.8/9.6kbps, and the rate adaptation is V.110.


Serve Network: GSM

Service benefit:

For operators -

z

Provide GSM CS data service.For subscribers -

z Enjoy GSM CS data service.


z Need IWF equipment.

WMFD-010600

Function name: UMTS bearer services

Description:


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Huawei MSOFTX3000 supports the following BS20 and BS30 bearer services:

z WMFD-010602 Non-transparent asynchronous bearer services-3.1kHz audio, andunder the UMTS, Fixed Network User Rate is 9.6/14.4/19.2/28.8kbps.

z WMFD-010603 Non-transparent asynchronous bearer services-UDI, and under the

UMTS, the rate is 9.6/14.4/19.2/28.8kbps, and the rate adaptation is V.110/V.120.

z WMFD-010605 Transparent synchronous bearer services-UDI, Fixed Network User

Rate is 64kbps.

z WMFD-010606 Transparent synchronous bearer services-multimedia, Fixed NetworkUser Rate is 64kbps, the rate adaptation is H223 and H245.


Serve Network: UMTS

Service benefit:

For operators -

z Provide UMTS CS data service and video phone.

For subscribers -

z Enjoy GSM CS data service and video phone.


z Asynchronous bearer service needs IWF equipment.

1.2 Supplementary servicesWMFD-020000Function name: Supplementary services (SS)

Description:

Include the supplementary services and its related functions.

The supplementary services are the supplement and conversion of the basic teleservices. The

supplementary services provided for the subscribers are based on the basic teleservices, and

they should be provided for the subscribers to use together with one or multiple basic servicesinstead of an independent service.

The supplementary services include Call Completion SS, Call Forwarding SS controlled byoperator/subscriber, Call Restriction SS, and Number Identification SS.

Implemented node: VMSC/VLR and GMSC


WMFD-020100

Function name: Call Forwarding (CF) SS

Description:


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The system forwards the calls to the Third Party based on the requirements of operator andsubscriber. The CF SS include Call Forwarding Unconditional (CFU), Call Forwarding on

Mobile Subscriber Busy (CFB), Call Forwarding on No Reply (CFNRy) and Call Forwardingon Mobile Subscriber Not Reachable (CFNRc).



WMFD-020101

Function name: Call Forwarding Unconditional (CFU)

Description:

When the mobile subscriber is a called party, all the calls are forwarded to the Third Party.

The Third Party here either can be any subscriber in the PLMN, PSTN and ISDN or the

service console (such as Voice Mailbox).Implemented node: VMSC/VLR and GMSC


WMFD-020102

Function name: Call Forwarding on Mobile Subscriber Busy (CFB)

Description:

When the called mobile subscriber is busy, the call is forwarded to the Third Party. In addition,

the CFB can be classified into Network Determined User Busy (NDUB) and User DeterminedUser Busy (UDUB) based on the forwarding cause.



WMFD-020103

Function name: Call Forwarding on No Reply (CFNRy)

Description:

The mobile subscribers do not connect the call after receiving network ALERTING messagefor a long time, and the No reply duration timer expires, so the calls are forwarded to the

Third Party.



WMFD-020104

Function name: Call Forwarding on Mobile Subscriber Not Reachable (CFNRc)

Description:


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If the network is disconnected with radio channel of mobile subscriber, and the mobilesubscriber is the called party, all the calls are forwarded to the Third Party.

The Not Reachable conditions include paging no reply, radio channel allocation failure, and

subscriber power-off. The CFNRc is classified into the home CF and destination CF based on

the forwarding places.



WMFD-020200

Function name: Call Restriction SS

Description:

The Call Restriction SS include Barring of All Incoming Calls (BAIC), Barring of Incoming

Calls when Roaming Outside the Home PLMN Country (BIC-Roam), Barring of AllOutgoing Calls (BAOC), Barring of Outgoing International Calls (BOIC), and Barring ofOutgoing International Calls except those directed to the Home PLMN Country

(BOIC-exHC).

The Call Restriction SS defined standardized include barring of incoming calls and barring ofoutgoing calls. Wherein, the former includes BAIC and BIC-Roam, and the latter includes

BAOC, BOIC, and BOIC-exHC.



WMFD-020201

Function name: Barring of All Outgoing Calls (BAOC)

Description:

When the service is activated, the subscribers are unable to originate the calls except the

emergency calls.



WMFD-020202

Function name: Barring of Outgoing International Calls (BOIC)

Description:

When the service is activated,

z If the mobile subscribers are roamed in the home PLMN, they are not allowed to

originate a call to the overseas subscriber.

z If the mobile subscribers are roamed outside the home PLMN, they can originate a callto local subscribers only.


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WMFD-020203

Function name: Barring of Outgoing International Calls except those directed to theHome PLMN Country (BOIC-exHC)

Description:

When the service is activated, the subscribers are unable to originate the international tollcalls except a call in home country.



WMFD-020204

Function name: Barring of All Incoming Calls (BAIC)

Description:

When the service is activated, the subscribers are unable to connect all the incoming calls.



WMFD-020205

Function name: Barring of Incoming Calls when Roaming Outside the Home PLMNCountry (BIC-Roam)

Description:

When the service is activated and the mobile subscribers are roaming outside the homePLMN country, they are unable to receive the incoming calls from other subscribers.



WMFD-020300

Function name: Number I dentification SS

Description:

The system provides calling number for called identification presentation or restriction, and

connected number for calling identification presentation or restriction. Number identificationSS include Calling Line Identification Presentation (CLIP), Calling Line Identification

Restriction (CLIR), Connected Line Identification Presentation (COLP) and Connected LineIdentification Restriction (COLR).



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WMFD-020301

Function name: Calling Line Identification Presentation (CLIP)

Description:

CLIP is a supplementary service provided for called mobile subscriber. When the mobile

subscriber connects a call, the system provides calling number for the subscriber, and thesubscriber can know the calling party before connecting the call, and determine whether to

connect, reject or forward the call.



WMFD-020302

Function name: Calling Line Identification Restriction (CLIR)

Description:

CLIR is a supplementary service provided for calling mobile subscriber. When the mobile

subscriber is a calling party, the system is not allowed to provide calling number for the calledsubscriber.



WMFD-020303

Function name: Connected Line Identification Presentation (COLP)

Description:

When the mobile subscriber is a calling party, the system provides called number for the

calling subscriber. When the called subscriber activates CF SS, and the subscribercommunicating with mobile calling subscriber is the forwarded subscriber instead of the

subscriber that the calling party calls, the system provides the forwarded number for themobile calling subscriber.



WMFD-020304

Function name: Connected Line Identification Restriction (COLR)

Description:

When the mobile subscriber is a called party, the system is not allowed to provide calledmobile number for the calling party. When this mobile subscriber is the forwarded one, thesystem is not allowed to provide forwarded number for the calling party.



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WMFD-020400

Function name: Call Completion SS (CW/HOLD)

Description:

Call Waiting (CW): When the mobile subscribers are in the conversation, they are allowed to

connect another call. At that time, the system prompts that another call is waiting, and the

called subscriber can determine whether to connect this call.

Call Hold (HOLD): The subscriber terminates current call temporarily and connects a new

incoming call. After the new call is connected, the subscriber can shift the conversation

between the old and new one, and another call is in HOLD state.

Generally, the CW and HOLD are effective when they are used together. If the subscriber

wants to connect a new all, Call HOLD function is required, and the subscriber cannotconnect the new call before current call is in HOLD state.



Service benefit:

For operators -

z Enhance the service function and attract more subscribers.

z Increase successful connection ratio and traffic.

For subscribers -z Connect a call when the subscribe is busy

z Enhance the subscriber satisfaction, especially for high-priority and commercialsubscribers.


None

WMFD-020500

Function name: Multiparty SS (MPTY)Description:

The mobile subscriber registering the supplementary service can organize multiparty

telephone conference, providing the conversation among multiparty (this mobile subscriberincluded). With a maximum of 6 subscribers have a conversation at the same time through the

MPTY. During the MPTY, the main control subscriber can add/disconnect/isolate remotesubscriber (note: here isolate means the chairman of the MPTY will hold one subscriber to

isolate him from the meeting temporally).



Service benefit:


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For operators -

z Enhance the service function and attract more subscribers.

z Provide a simple telephone conference solution for the commercial subscriber.

For subscribers -

z Provide multiparty chat service.

z Under some conditions, provide a simple telephone conference function for commercialsubscribers.


None

WMFD-020600

Function name: Unstructured Supplementary Service Data (USSD)

Description:

USSD: The subscriber enters operation command of the un-standardized supplementary

service consistent with USSD format and originates a special service request to the network,or the network side sends a USSD command to the network to implement a special service.

Compared with SMS, USSD service can exchange messages in real time for the convenienceof stock query.

MSOFTX3000 support USSD of protocol version 1 and version 2.



Service benefit:

For operators -

z Provide special value-added service (VAS), such as stock/lottery/weatherforecast/scheduled flight information.

z Enhance service function.

z Attract more subscribers.

For subscribers -

z

Satisfy the requirements for information query, such as lottery and stock information.Requirements for peripheral network entities -

z The network should provide USSD centre equipment.

WMFD-020700

Function name: Closed User Group (CUG)

Description:


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One or several users with the same attributes form into a group, so the members have thesame call attribute. CUG service is applicable for a small group with several members or a

large enterprise with thousands of subscribers.



Service benefit:

For operators -

z Enhance service capability.

z Attract more group subscribers.

For subscribers -

z The group members enjoy flexible charging preferential.

Requirements for peripheral network entities -None

WMFD-020800

Function name: Explicit Call Transfer (ECT)

Description:

ECT is a supplementary service and the description is available in the 3GPP TS 23.091. Withthe ECT function, subscriber A can respectively call subscribers B and C and both calls are in

answer status. Or, when a call is in answer status and another is in ringing status, subscriber A

(the calling party) can first connect subscriber B with subscriber C to allow them to talk witheach other and then exit the call. Note, IN subscribers is not support ECT.

Implemented node: MSC/VLR

Served network: GSM or UMTS

Service benefit:

For operators -

Realize the diversification of services.

For subscribers -

Enjoy the ECT service.

Requirements for peripheral network entities:

None.

WMFD-021100

Function name: Supplementary service restriction

Specification: None



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Served network: GSM and UMTS

Brief introduction:

The function is used to restrict a special number being HOLD, passively being added to the

multiparty service (MPTY), or passively serving as an ECT diverting party.Description:

The function is used to restrict a special number being HOLD, passively being added to theMPTY, or passively serving as an ECT diverting party. It aims to prevent illegal subscribers

from deceiving by using the network supplementary service function. For example, cheater A

dials the number of cheatee B who has a rechargeable card, holds B, and dials 0850. Afterdialing 0850, A enters his own MSISDN according to the voice prompt first, and then sets upthe MPTY. B listens to the alert tone, requiring him to enter the information of the

rechargeable card. Thus when B completes the operation, the money in the card is put on the

account of A. This function can restrict this deceiving method, greatly reducing theprobability of subscribers being deceived. It only supports the restriction function of

supplementary services HOLD, MPTY and ECT.In the service, you can set self-defined properties 36, 37 and 38 for special numbers by settingthe subscriber service property data to restrict HOLD, MPTY, and ECT respectively. When a

calling subscriber calls a special number, since the subscriber service property data is matched,and restricting HOLD, MPTY, and ECT is set, the calling subscriber cannot perform the

operation of HOLD, MPTY, and ECT.

Typical application scenario:

The function supports subscribers to directly dial some specific numbers which restrict

the three supplementary services such as HOL D, MPTY, and ECT.

1: A calls B, or B calls A, and A originates call hold after call completion.

If B is a restricted subscriber, the HOLD operation of A to B fails.

2: A calls B, and A originates call hold after call completion.

A calls C, and A originates the MPTY or ECT service after call completion.

If B is not a restricted subscriber, while C is a restricted subscriber, the MPTY or ECT serviceoriginated by A fails after C is put through.

3: B calls A, and A originates the call hold after call completion.

A calls C, and A originates the MPTY or ECT service after call completion.

If C is a restricted subscriber, the multi-connection request of A fails.

4: A calls B, and A originates call hold after call completion.

C calls A, and A originates the MPTY or ECT service after call completion.

If C is a restricted subscriber, the multi-connection request of A fails.

The MPTY also contains adding new subscribers to the existing meeting.

Through the forwarding mode, the function supports transferring subscribers to some

specific numbers which restrict the three supplementary services such as HOLD, MPTY,

and ECT.


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When subscribers are transferred to some specific numbers such as 0850 through the

forwarding mode, the three supplementary services such as HOLD, MPTY, and ECT can be

transplanted. That is, restrict the function of HOLD, MPTY or ECT according to the latestput-through numbers, but not the intermediate numbers of subscribers. In which, theforwarding contains intra-office forwarding and other office forwarding.

In addition, the function of whether to restrict these supplementary services is related to callsformed by subscriber dialing some specific numbers. When these calls are released, it is not

required to restrict the function. For example, subscriber A dials and holds B who is not a

restricted subscriber, and then dials C who is a restricted subscriber. At this time, it is notallowable for A to originate HOLD, MPTY or ECT. When A releases the call between A andC, and then dials D who is not a restricted subscriber, A can originate HOLD, MPTY or ECT

after call completion.

Service benefit:

For operators

The supplementary service restriction function makes operators restrict malicious subscribersto deceive through supplementary services provided by the network, thus improving

subscriber satisfaction.

For subscribers

It greatly reduces the probability of subscribers being deceived.


The supplementary service restriction function only involves the requirements of the MSC.

For the service, the originating office (V)MSC mainly completes different signaling

processing and data analysis of relevant calls.


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1.3 Operator Determined Barring (ODB) services

WMFD-030000Function name: Operator Determined Barring (ODB) services

Description:

ODB is controlled by network operators, and is implemented through HLR data management.The main purpose is that the operators restrict the call capabilities of subscribers based on

different characteristics, especially in economic capability to ensure that operators will not

suffer serious loss about the conversation fees.

ODB is applicable for all the user terminal service and bearer service except the emergencycalls. Compared with the above mentioned SS, ODB provides higher priority. When the two

services conflict, the above-mentioned supplementary service will be prohibited.

Both ODB and call restriction SS implement barring service. The differences are as follows:

z The former subscriber state is controlled by operators, but that of the latter is controlledby the subscriber himself or the operator.

z The former can be activated upon the provision, but the latter is activated after thesubscriber activates it.

MSOFTX3000 supports the following ODBs:

z ODB: Barring outgoing calls WMFD-030100

z ODB: Barring outgoing international calls WMFD-030200

z ODB: Barring outgoing international calls except those directed to the home PLMN

country WMFD-030300

z ODB: Barring incoming calls WMFD-030400

z ODB: Barring of outgoing calls when roaming outside the home PLMN countryWMFD-030500

z ODB: Barring incoming calls when roaming outside the home PLMN countryWMFD-030600

z ODB: Barring of outgoing Premium Rate Calls (Information) WMFD-030700

z ODB: Barring of outgoing Premium Rate Calls (Entertainment) WMFD-030800

z ODB: Barring of Supplementary Services Management WMFD-030900

z ODB: Barring of Roaming outside the home PLMN WMFD-031000

z ODB: Barring of domestic toll calls (HPLMN self-define type1) WMFD-031100

z Self-defined ODB restriction function WMFD-031200




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1.4 Value-Added services

WMFD-040000Function name: Value-Added services

Description:

Include the special services provided by Huawei MSOFTX3000

WMFD-040100

Function name: Multimedia Telephony service (H.324M)

Description:

With the support of UDI bearer service, implement the Visual Communication ofcircuit-switched domain (CS), including the multimedia services, such as video conference,

Video on Demand and mobile TV and so on.

Implemented node: VMSC/VLR, GMSC and TMSC

Serve network: UMTS

Service benefit:

For operators -

z Provide visual communication service of CS.

z Strengthen service competitionz Attract the fad or commercial subscribers that are interest in visual communication

service.

For subscribers -

z Satisfy the desire for visual communication.


Need the support from VIG for video conference, Video on Demand and mobile TV services.

WMFD-040200

Function name: Ring Back Tone service for speech

Description:

Ring Back Tone service for speech is also called Ring Back Tone (RBT) service. It replacesthe tedious ring back tone with fair-sounding music and other special sounds and voices.

When other subscribers call one customized with RBT service, they hear customized RBT

instead of conventional RBT. Huawei MSOFTX3000 supports multiple implementationmodes (such as, calling party devious, non-devious of calling party and non-devious of called

party). Huawei MSOFTX3000 support these triggering mode: SS-CODE, IN, NPI.



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Serve network: GSM and UMTS

Service benefit:

For operators -

z Provide rich services.

z Strengthen operator competition.

z Increase the revenue.

For subscribers -

z Enjoy fair-sounding music.


z Obtain the support from SCP and IP equipment.

WMFD-040400

Function name: Operator determinate call purge (ODR)

Description:

The operators can forcedly disconnect a call being in conversation at any time.

Implemented node: VMSC/VLR, GMSC and TMSC


Service benefit:

For operators -

z Forcedly disconnect the malicious long-time conversation of fraud subscribers to reducecharging loss.

z Forcedly disconnect the long-time conversation because of network abnormity to reducecharging variance as possible and charging loss of end subscriber arising thereof.

For subscribers -

z Avoid the calls from being embezzled maliciously to reduce charging loss.


None

WMFD-040500

Function name: Optimal Routing (OR)

Description:

Optimal Routing (OR) is a network optimization strategy of operators. Its description is

available in 3GPP TS 23.079. Supporting OR can reduce alternate speech path routing ofsome calls to save the network resource and reduce the operation cost.

Through negotiation and cooperation between operators, three types of OR call procedures

can be supported:


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z Basic OR call: The GMSCA belonging to operator A can directly obtain the roamingnumber from the HLRB belonging to operator B and directly route the call to the

VMSCB of the roaming subscriber, instead of routing the subscriber number to GMSCBfor processing.

z

Early forwarding OR call: If early forwarding occurs to the call upon the query of basicoptimal route, early forwarding can be processing on the GMSCA so far the

corresponding early forwarding charging principles are met.

z Late forwarding OR call: If late forwarding occurs to the call on the VMSCB, and thecorresponding early forwarding charging principles are met, late forwarding procedure

can be carried out on the GMSCA that obtains the roaming number to reduce alternatespeech path routing when the call is transited through the VMSCB.

Implemented node: VMSC/GMSC


Service benefit:

For operators -

OR can help save the operation cost. As the operation strategy, OR also help to win more

subscribers by reducing the call costs of subscribers using the OR.

For subscribers -

Subscribers can save call costs if operators reduce the call costs of subscribers using the OR.


Negotiation and cooperation between operators and support of the network entity HLR are

required.

WMFD-040600

Function name: Black or white list for calls

Description:

Black or white list provides a means to bar calls according to the source of calling numberand/or calling number, and called number. This function is primarily used by gateway offices

to control the authority of inter-network calls.

At present, black or white list is a powerful call restriction control function. The calling or

called parties can be set through data configuration to a group such as black list group, white

list group, or common group. Calls between the white list group and other groups are allowed.Calls between black list group and non-white list group are prohibited. Calls betweencommon groups are restricted depending on the relationship between groups.

Black or white list function is divided into two parts: Calling number discrimination and black

and white lists. For an incoming trunk group call, the discrimination group number and call

barring group number can be set in the trunk group. If the discrimination group number isvalid, calling number discrimination is carried out and the discrimination result is direct call

barring, or call barring according to the minimum or maximum number length, ormodification of attributes (primarily the call barring group number). After the calling numberdiscrimination is completed, if call barring is not carried out, the final mobile originated (MO)

call barring group is obtained. Then the mobile-terminated (MT) call barring group is

obtained through data configuration. If the relationship between calling and called parties


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cannot be determined, the relationship between groups will be configured to decide whetherto disconnect the call.

Through the above procedures, calling and called parties of an incoming trunk call can be

listed to the black or white list.

Implemented node: GMSC


Service benefit:

For operators -

z Allow or prohibit the transiting of toll calls to other operators.

z Intercept calls with wrong calling numbers to avoid wrong billing.

For subscribers -

Requirements for peripheral network entities:None

WMFD-040900

Function name: Notification of Failure to Multimedia Calls (NFMC)

Description:

If the calling party originates an unsuccessful VP call, a USSD format notice will bereturned immediately to the calling party. Because the call originated by calling party is video

one, it is impossible to play announcement directly. The service will provide a USSD to

perfect subscriber interface dramatically once the call is not connected. If multimedia fallbackor video gateway function is selected, the subscriber also achieves the same result throughplaying failure announcement or video prompt.


Serve network: UMTS

Service benefit:

For operators -

z Enhance QoS.

For subscribers -

z Experience more friendly subscriber and optimized service.


None

WMFD-041100

Function name: Speech telephony for international prepaid roaming subscribers (UCB)

Description:


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When an international roaming subscriber wants to originate a speech call, send a USSDrequest to home SCP and the USSD request includes subscriber USSD service code, and

called number.

According to subscriber USSD request, SCP authenticates the subscribers first, and then sends

an ICA command to SSP.

Upon receiving the command from SCP, SSP originates a call to calling and called party

respectively.

After the calling and called party connect the call, connect the two calls from SSP to calling

and called party to implement the conversation between calling and called party.

In addition, the subscriber can set a call from SCP to calling party first or a call from SCP tocalled party through this function.



Service benefit:

For operators -

z Provide speech UCB call.

For subscribers -

z International roaming subscriber can originate a speech call through UCB service.


z Cooperate with SCP.

WMFD-041400

Function name: Caller or callee pay

Description:

Caller/callee pay is a new service over ETSI GSM CAMEL PHASE2 standard.

Mobile subscriber enjoys caller pay service through adding service access code (such as12597) to original MS number, and the caller pays partial or all the conversation fees for the

callee.

Mobile subscriber enjoys callee pay service through adding service access code (such as12598) to original MS number, and the callee pays partial or all the conversation fees for the

caller.

z For the caller pay service, the caller pays the conversation fees for the callee.

z For the callee pay service, the callee pays the conversation fees for the caller.



WMFD-041500

Function name: Mobile Virtual Private Network (MVPN)


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Description:

VPN service: Establish a private network of logic voice channel on the PLMN and PSTN, andenable the convenient communication among enterprise and group subscribers through private

numbering plan and Abbreviated Dialing.

If VPMN service is activated in the PLMN, we provide a private network service similar toPSTN Private Branch Exchange (PBX) for the mobile subscriber of the group registering this

service. The system triggers the IN based on CSI.

VPN service provides the following functions for VPMN subscriber:

z Intra-network call.

z External network call.

z Private label.

z Abbreviated label.

z Group access number.

z Override.

The service provides a preferential strategy of conversation fee for the group and enterprise,

which facilitates remaining the important customers for the mobile operators.

According to the specifications, VPMN service requires that all the MSC/GMSC/HLR should

support MAP2+, all the MSC/GMSC provides SSP function, and triggers the IN servicethrough O-CSI/T-CSI. So VPMN service must be implemented in the target network.



Service benefit:

For operators -

z Provide VPMN service.

For subscribers -

z Enjoy VPMN service.


z Cooperate with SCP.

WMFD-041700

Function name: Prepaid IP calls at fixed terminal (PPIP)

Description:

PPIP service is an intelligent network service over ETSI GSM CAMEL PHASE2 standard.The PSTN subscriber can establish a prepaid account in the system to originate an IP callthrough this account. Currently, set PSTN number directly to an account, that is, bind PSTN

number with this account. The subscriber can originate an IP call directly through this PSTN

telephone. The system determines whether to connect or disconnect the call based on theaccount balance in case of call setup. Once the call is connected, the system performs

real-time charge and reduces the PP money on the subscriber account. If the account balance

is used up, the call will be disconnected forcedly.


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Implemented node: GMSC/SSP


WMFD-041800

Function name: IP calls at fixed terminal for postpaid subscribers

Description:

Postpaid IP service: The mobile subscriber applies for the service and pays this service fees.The service account of service applicant is paid one, recording the service fees.

The PSTN subscriber enjoys the service, and originates an IP call directly through this service.

The service account of subscriber enjoying the service is used one, recording the setting ofthis service and conversations.

The system determines whether to connect or disconnect the call based on the account balance

in case of call setup. Once the call is connected, the system controls the charging. Themarketing dept. charges IP conversation fees for the subscriber based on postpaid bill. You

can bind multiple PSTN telephone accounts (with the maximum of 50 and default value 10)

into a MS to pay conversation fees of all the IP calls. But the PSTN telephone should belocated in the same service area with the bound MS.

Implemented node: GMSC/SSP


WMFD-042000

Function name: IP calls for mobile called party

Description:

The PSTN or mobile subscriber can originate an IP call through dialing IP access code+

called mobile number.

Implemented node: GMSC


WMFD-042100

Function name: North American Equal Access (NAEA)

Description:

Equal access service: The mobile subscriber can select freely the network of each toll operatorto implement the equal competition of toll operator.

To implement the equal access, each toll operator is allocated for a CIC. After signing anagreement with relevant toll operator, the mobile subscriber can select freely the toll network

of this toll operator to originate a call through adding CIC of this toll operator. Two modes touse the service are: Preset CIC and Dial up freely CIC.

Mobile subscriber can add the function of network selection through preset. The mobile

subscriber can select freely toll operator through the preset function. After the preset, mobile


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subscriber can select a preset toll network channel of one operator to originate a toll callwithout dialing the CIC.

The mobile subscriber with the preset function still can select non-preset toll operator through

adding CIC. The subscriber neither dialing CIC nor performing preset for the operator adopts

the default toll network set by the operator for the call proceeding. According to the technicalspecifications stipulated by Information Industry Ministry, the function of network selectionthrough preset is implemented by enabling a subscriber parameter North American Equal

Access Preferred Carrier ID (NAEA) defined in the ETSI 09.02 (MAP2+) specifications.

This parameter is stored in HLR, identifying the toll operator selected by the mobile

subscriber. This parameter can be located in the "Insert subscriber data" in case of locationupdate and the "Send routing information ack in case of call connection.

HLR sends the parameter to MSC/VLR. According to the received NAEA parameter,

MSC/VLR maps the Carrier ID value of the parameter to toll service network code (CIC) of

each toll operator. If the service requirements are satisfied, add the code to called number andsend them to GMSC. In addition, GMSC completes the subsequent call proceeding.



Service benefit:

For operators -

z Satisfy the requirements for equal competition.

For subscribers -

z Select the toll call service of each toll operators freely.


HLR should be able to support the subscription of this service data.

WMFD-042200

Function name: Cell and Time Dependent Discount

Description:

Cell and Time Discount: According to the agreement with the operator in advance, the system

can determine discount rate of current call based on the cell position where the subscriber is

located when originating or connecting a call and time.z The discount area of cell discount can be divided with unit of GSM cellular. Because the

population and activity places are different, the cellular cell managed by one mobilenetwork may be very busy, but other cellular cells are relatively idle. Cell discount

facilitates operator adjusting the geographical distribution of traffic through the rate, anddecreases the discount rate of the area with less traffic to increase the traffic in this area.

z The discount time segment of time discount can be divided with the unit of hour and

minute. Different areas are located in different time segments. Because the centralizedpersonnel and company institutes are different, the peak segments of traffic are different.

For example, the traffic of the area with centralized offices, and enterprise/institutes atdaylight can be the peak, but that with centralized supermarkets and amusement centresat night do.


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Service benefit:

For operators -

z Time discount service enables the operators to provide preferential for the subscribersduring the common time segment.

z Determine the specific preferential time segment and discount in the cell based onspecific traffic model in the cell.

z Help the operator equalize traffic and enhance the economic efficiency.

For subscribers -

z More charging selection.


None

WMFD-042300

Function name: Enhanced roaming restriction

Description:

It is not allow the subscriber to perform location update at local MSC based on the Zone Code,

location area, roaming type and IMSI of current roaming subscriber to implement flexibleroaming restriction function.

It enables the operator to implement flexible roaming restriction function based on the Zone

Code, location area, roaming type and IMSI of current roaming subscriber.



Service benefit:s

For operators -

z Provide flexible and controllable roaming restriction mechanism.

z Provide localization service similar to Wireless Local Loop (WLL) service.

z Attract more low-priority subscriber.

z Increase customer group.

z Increase the traffic.

For subscribers -

z Enjoy rich localization service to avoid the charging increment because of the roaming inanother place.


None


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WMFD-042400

Function name: Enhanced MSRN allocation

Description:

Support the function of allocating roaming number based on location area cell.

MSOFTX3000 also supports the function of allocating roaming number based on the MSC-ID

in case of virtual multi-MSC solution.



Service benefit:

For operators -

Determine the cell through roaming number to adopt different customer strategy, such as

charging strategy.

For subscribers -

None


None

WMFD-042500

Function name: Mobile Number Portability (MNP)

Description:

Huawei MSOFTX3000 supports MNP service of intelligent network mode. When originating

a call, MSC triggers CAMEL procedure to SCP, SCP queries the NP database. If the

subscriber is a NP one, insert the route information to called number, and then set up a callnormally.

Huawei MSOFTX3000 also support MNP SRF mode, which need MSOFTX3000 cooperate

with the STP to provide MNP service. The relevant NPDB function is embedded the STP..



Service benefit:

For operators -

z Provide MNP service.

For subscribers -

z Subscribe different operators without modifying telephone number.


z Cooperate SCP or STP.


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WMFD-042700

Function name: Alternate Line Selection (AL S)

Description:

Support the functions of line1 and line 2 through the terminal and subscribe a number for eachline. For two numbers of ALS, the subscriber can set different CF SS and Call barring SS.

When the subscriber adopts line 2 number:

z Perform only speech service and its supplementary service.

z Adopt ODB for service restriction.

z Only receive SM instead of sending SM.

z Can not perform USSD operation.


Serve Network: GSM and UMTSService benefit:

For operators -

z Provide two independent numbers for the subscriber to enhance the competition.

For subscribers -

z Apply for dual-line for office and private numbers.


None

WMFD-042800

Function name: Dual-MSISDN for multimedia and speech telephony

Description:

Subscribe two services of independent numbers respectively based on video and speech

service. This function is different from that with multiple MSISDN. After the subscriber

subscribes the service, calling/called video and speech calls adopt different numbers, anddual-MSISDN function is effective only when the subscriber is a called party. If the

subscriber registers this function and ALS, the subscriber has 3 telephone numbers.



Service benefit:

For operators -

Provide two independent speech and video call completely for the subscriber to enhance thecompetition.

For subscribers -

Apply for two numbers for speech and video call respectively.


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None

1.5 Mobility management

WMFD-050000

Function name: Mobility management

Description:

The location management function of mobile 2G/3G subscriber includes the following:

z General location update WMFD-050100

z Periodic location update WMFD-050200

z IMSI attach and detach WMFD-050300z Purge mobile subscriber WMFD-050400

The temporary data of mobile subscriber will be recorded in the MSC/VLR. Meanwhile, theVLR number where the subscriber is located currently will be recorded in HLR. When the

subscriber powers on/off, or the subscriber roams from one location area to another location

area, perform location update. To ensure the accuracy of location information in the network,MS should originate periodic location update.



WMFD-050500

Function name: GERAN/UTRAN Access Restriction (ARD)

Description:

This function allows operators to control the access of subscriber to the GERAN or UTRAN.

Provision of this function requires the collaboration of MSOFTX3000 and HLR and the HLRmust support the ARD subscription function.

The MSOFTX3000 provides the function to judge whether the subscriber has subscribed tothe ARD service. For example, if GREANAllowed/UTRANNOTAllowed is configured upon

the subscription of ARD on the HLR, if the local MSFTX3000 supports the ARD 3G function,location update will fail due to the access restriction when the subscriber tries to access the

network of local office from the 3G UTRAN. In this way, the subscriber is restricted fromaccessing the 3G network.



Service benefit:

For operators -

Flexibly control the subscribers access to GERAN or UTRAN.

For subscribers -


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The network must be equipped with HLR and the HLR must support the ARD subscriptionfunction.

WMFD-050600

Function name: Shared Network Area in Connected Mode (SNA)

Description:

At present, roaming restriction of mobile network is implemented in idle mode. There are ZCroaming restriction and enhanced roaming restriction and these types of restrictions are all

controlled by the CN. If relocation occurs when a subscriber is engaged in the conversion, the

CN cannot restrict the roaming area of the subscriber. In this case, the area that cannot beaccessed in idle can be accessed in connected mode. The Shared Network Area in Connected

Mode (SNA) function is used to solve this problem. For example, if two 2G network

operators shares one 3G network, operators can use this function to ensure that subscribersuse their own 2G network only.

The SNA function is implemented by CN and UTRAN together. The MSC provides the

configuration of roaming restriction information in connected mode and the shared networkinformation and transfers the roaming restriction information to the RNC. The RNC

completes the roaming restriction in connected mode based on the roaming restrictioninformation received. The configuration of shared network information contains theconfiguration of shared network area, which helps realize the area-based roaming restriction.

Configuration of subscriber roaming restriction information is completed through the IMSI

number segment. The roaming restriction in connected mode is implemented by configuringthe allowed shared network area group.


Served network: UMTS

Service benefit:

For operator -

Realize consistent mobile access restriction in idle mode and in connected mode and enhance

the network restriction function.

For subscribers

None


RNC must support the SNA function.

WMFD-050700

Function name: Local-based service restriction

Description:

When a subscriber who subscribes to a ZoneCode updates a location or performs services, the

MSC judges whether the subscriber belongs to a ZoneCode, and performs logic judgment

according to the area service. For local smart services, this function allows or refuses subscribers


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to update location, complete calls (calling or called), or to use the SMS, supplementary service and

LCS service.



Service benefit:

For operators

It is convenient for operators to develop the area service of local smart services.

For subscribers


The HLR is required to support subscribing the ZoneCode.

WMFD-050900

Function name: Roaming restriction for CAMEL

Description:

When a subscriber subscribes the O-CSI, the MSC can consider whether the CAMEL

subscriber is allowed or restricted to roam according to the subscribed CAMEL version.


Served network: GSM and UMTSService benefit:

For operators

It is convenient for operators to control whether to allow the roaming of intelligentsubscribers.

For subscribers


The HLR is required to support subscribing the O-CSI.

WMFD-051000

Function name: Priority selection of subscribers when VDB capacity being restricted

Description:

When the VDB capacity nears the upper limit, it is required to restrict online of subscribers

with lower priority according to the roaming type, or subscribed EMLPP and CARP.




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Service benefit:

For operators

In case that the capacity is restricted, it is required to ensure the normal online of subscribers

with higher priority so as to reduce the loss of operation.For subscribers


When adopting subscribed EMLPP and CARP to control priorities, the HLR needs to support

subscription.

1.6 Security management

WMFD-060000

Function name: Security management

Description:

Security management includes TMSI re-allocation, Mobile subscriber identification,Authentication and Encryption.



WMFD-060100Function name: TMSI re-allocation

Description:

Temporary Mobile Subscriber Identity (TMSI) is managed by MSC/VLR. TMSI re-allocationaims to ensure IMSI security through using TMSI in the air radio interface to prevent the

Third Party from tracing the subscriber activities through IMSI.

When the subscriber enjoys the services in the area controlled by a MSC/VLR, MSC/VLRallocates a TMSI identifying the subscriber uniquely at this MSC/VLR based on the special

principle of TMSI allocation for the subscriber. So the network identifies the subscriber

through the TMSI, all the exchange of signaling and data does not use IMSI again for the

purpose of security.



WMFD-060200

Function name: Mobile subscriber identifier

Description:

Mobile subscriber identifier refers to IMSI.


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When the network cannot identify TMSI used by mobile subscriber in case of the access,originate the IMSI identify process. After receiving the identifier response of mobile

subscriber, the network allocates new TMSI.



WMFD-060300

Function name: Authentication and Encryption

Description:

Support authentication and encryption process defined by GSM and UMTS.



WMFD-060301

Function name: GSM Authentication and Encryption

Description:

z Support authentication encryption algorithm and process defined by GSM.

z Support common authentication.

z Support 1/N authentication mode.

z Perform only once authentication during N times of location update and service accessthrough data configuration.

z Support the multiplexing of authentication parameter.

One authentication procedure requires a group of authentication parameters. Differentauthentication parameters for different authentications will result in high signaling load from

MSC to HLR, and the decrease of HLR processing capability. The subscriber can use theauthentication parameter multiplexing function and multiplexing times at MSC through the

data configuration. In this way, multiple authentications use the same authenticationparameters to reduce network load and enhance HLR processing capability.

z Support the encryption defined by GSM.


Serve Network: GSM

WMFD-060302

Function name: UMTS Authentication and Encryption

Description:

Support authentication encryption algorithm and process defined for the UMTS. Comparedwith GSM network, the UMTS authentication parameters are extended from triplets and

quintets. In addition, several new encryption algorithms are defined.


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Support 1/N authentication mode and authentication parameter multiplexing.


Serve Network: UMTS

WMFD-060400

Function name: Authentication one more time

Description:

In authentication procedure, if authentication is failure (SRES return from MS is not correct),

then MSC will use another new parameter RAND to authenticate the MS in the current

connection. If the second authentication is failure, then MSC will reject this service requestaccording to GSM specification.


Serve Network: UMTS

WMFD-060500

Function name: Conversion functions of authentication triplets and quintets

Description:

Support the inter-conversion between GSM Triplet and UMTS quintuple authentication sets to

facilitate the free roaming or handover between GSM and UMTS for the subscribers.

Implemented node: VMSC/VLRServe Network: GSM and UMTS

Service benefit:

For operators -

z Provide seamless roaming function in the system.

For subscribers -

z Enjoy the service provided by GSM network where the UMTS network is not covered.


None

WMFD-060600

Function name: Built-in EIR

Description:

Built-in Equipment Identification Register (EIR) refers to the virtual EIR set on the MSC.

Information about some illegal International Mobile Station Equipment Identities (IMEIs) canbe configured on the built-in EIR to allow the local operator to realize the CHECKIMEI

function.


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With the CHECKIMEI function, IMEI can be obtained from the mobile equipment and sent tothe EIR to further check the equipment status.

In the function configuration table, there is an item indicating whether the built-in EIR

function is supported. If built-in EIR is supported, grey list subscribers and black list

subscribers can be configured. Those subscribers not configured are treated as white listsubscribers by default. If a subscriber is a black list subscriber, the CHECKIMEI fails, and asa result, location update of the subscriber and service processing are rejected. If a subscriber is

a grey list subscriber, location update of the subscriber is allowed. During the service

processing, if the grey list subscriber is a calling party and the tone play is configured in theMAP function configuration table, the tone is played. After the tone is played, whether the call

is connected is determined by the MAP function configuration table. If tone play is notconfigured in the MAP function configuration table, the tone is not played and the call is

directly connected. If the grey list subscriber is a called party, no special processing is used.

The maximum volume of build-in EIR is 20,000.

Implemented node: VMSC/VLR (You can add GMSC or TMSC here.)


Service benefit:

For operators -

Use the built-in EIR to realize part of the EIR functions on the MSC.

For subscribers

None


None

1.7 Subscriber data management

WMFD-070000

Function name: Subscriber data management

Description:

A series of operations of mobile subscriber data in the VLR, including:

z Insertion of data in the VLRWMFD-070100

z Deletion of data in the VLRWMFD-070200

z Change of data in the VLRWMFD-070300

z Cancel location WMFD-070400

z Roaming Restriction Due To Unsupported Feature WMFD-070600

z Querying subscriber information by MSISDN/IMSI WMFD-070700

z Managing and allocating number resources (MSRN/HON/TMSI) WMFD-070800

z Manually deleting designated subscriber in VLRWMFD-070900

z Purging mobile subscriberWMFD-071100

z Implicit IMSI detach WMFD-071200


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z VLR restoration WMFD-071300



1.8 Handover functions

WMFD-080000

Function name: Handover functions

Description:

Support the channel handover because of radio acceptance level, channel, quality, distance

and traffic during the call setup or completion of call setup.

Avoid the call drop because of terminal mobility, radio quality and coverage, and enable the

subscriber to obtain satisfactory conversation quality or reduce partial system congestion.

Generally, the handover is originated by radio access network.

In respect of GSM network and UMTS network, the handovers provided by MSOFTX3000

for network side: intra-GSM handover, intra-UMTS handover, inter-UMTS handover andinter-GSM handover.

In respect of MSC, the handovers implemented by MSC include: Intra-MSC handover,

inter-MSC handover and subsequent handover.

Intra-MSC handover: Radio channel of mobile subscriber is switched from current BSS/RNSto another BSS/RNS of the same MSC. The completion of handover is controlled by one

MSC. The intra-MSC handover can be divided into MSCa intra handover and MSCb intra

handover according to whether the MSC is controlling MSC. When the handover happens inthe controlling MSC, the handover is called MSCa intra handover, and MSCb intra handover

when it happens on the non-controlling MSC.

Inter-MSC handover: To keep the conversation, mobile subscriber is switched from BSS/RNScoverage of one MSC to the BSS/RNS coverage of another MSC.

For inter-MSC handover, the controlling MSC(MSCa ) controls the whole handoverprocedure. Firstly the relocation command is reported by the RNC to the MSCa, then MSCa

will choose the target MSC and send the handover resource requirement to the target MSCb.

Then the bearer between the two MSCs is built up. The MSCb will handle the allocation ofnecessary radio resources for handover procedure and finish the subsequent call control withthe assistant from the MSCa.

Subsequent handover: After basic handover of mobile subscriber is successful, inter-MSC

handover is generated again during the continuous conversation. According to different

handover destinations, subsequent handover includes: Subsequent handover to anchor MSCand subsequent handover to the Third Party MSC.




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WMFD-080100

Function name: Intra-GSM handover

Description:

MSOFTX3000 supports intra-GSM-MSC handover, inter-GSM-MSC handover, andinter-GSM-MSC subsequent handover.

WMFD-080101

Function name: Intra-GSM_MSC handover

Description:

The handover between two BSS of the same MSC

According to whether MSC is the Anchor MSC or not, divide the handover into intra- MSCa

handover and intra-MSCb handover.

The MSC of call established early is called Anchor MSC. The handover in the Anchor MSC is

called intra-MSCa handover, and that in non-anchor MSC is called intra-MSCb handover.

WMFD-080102

Function name: Inter-GSM_MSC handover

Description:

The handover from BSS of Anchor MSC to BSS of non-anchor MSC

During the inter-GSM-MSC handover, Anchor MSC (MSCa) controls all the handoverprocess, including the following:

z Select target MSC from target cell and BSC.

z Originate a resource handover request to non-Anchor MSC (MSCb) through MAPsignaling, bearer setup between MSCs and call control after the handover.

MSCb is responsible for establishing the radio side resource required by this handover, and

completes the call control after the handover, cooperating with MSCa.

WMFD-080103

Function name: Intra-GSM subsequent handover

Description:

Refer to the inter-GSM-MSC handover originated by non-anchor MSC (MSCb) after the

inter-GSM-MSC handover

According to whether target MSC is Anchor MSC, divide the handover into subsequenthandover to MSCa and subsequent handover to the Third Party.

The procedures for subsequent handover to MSCa:

z After receiving BSS handover request, MSCb originates a handover to MSCa through

MAP signaling.


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z After controlling the resource allocation of local BSS, MSCa notifies MSCb to deliver ahandover command.

z When the subsequent handover is over, release the bearer between MSCa and MSCb.

The procedures for subsequent handover to the Third Party MSCb:

z After receiving BSS handover request, MSCb originates a handover to MSCa throughMAP signaling.

z MSCa originates a handover to MSCb.


WMFD-080200

Function name: Intra-UMTS handover

Description:

Intra UMTS 3G handover refers to the handover within the UMTS system.

MSOFTX3000 supports intra-UMTS-MSC handover, inter-UMTS-MSC handover, and

inter-UMTS-MSC subsequent handover.

WMFD-080201

Function name: Intra-UMTS_MSC handover

Description:

The handover between two RNS of the same MSC

According to whether MSC is the Anchor MSC or not, divide the handover into intra- MSCahandover and intra-MSCb handover.

The MSC of call established early is called Anchor MSC. The handover in the Anchor MSC iscalled intra-MSCa handover, and that in non-anchor MSC is called intra-MSCb handover.

WMFD-080202

Function name: Inter-UMTS_MSC handover

Description:

The handover from RNS of Anchor MSC to RNS of non-anchor MSC

During the inter-UMTS-MSC handover, Anchor MSC (MSCa) controls all the handover

process, including the following:

z Select target MSC from target cell and RNS.

z Originate a resource handover request to non-Anchor MSC (MSCb) through MAPsignaling, bearer setup between MSCs and call control after the handover.

MSCb is responsible for establishing radio side resource required by the handover, and

completes the call control after the handover, cooperating with MSCa.


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WMFD-080203

Function name: Intra-UMTS_MSC subsequent handover

Description:

Refer to the inter-UMTS-MSC handover originated by non-Anchor MSC (MSCb) afterinter-UMTS-MSC handover

According to whether target MSC is Anchor MSC, divide the handover into subsequenthandover to MSCa and subsequent handover to the Third Party.

The procedures for subsequent handover to MSCa:

z After receiving RNS handover request, MSCb originates a handover to MSCa through

MAP signaling.

z After controlling the resource allocation of local RNS, MSCa notifies MSCb to deliver ahandover command.

z

When the subsequent handover is over, release the bearer between MSCa and MSCb.The procedures for subsequent handover to the Third Party:

z After receiving RNS handover request, MSCb originates a handover to MSCa throughMAP signaling.

z MSCa originates a handover to MSCb.


WMFD-080300

Function name: Inter-system handover

Description:

Include the handovers from GSM network to UMTS network or from UMTS network toGSM network.

WMFD-080301

Function name: Handover from GSM to UMTS

Description:

Support the function: GSM and UMTS dual-mode MS can be switched from GSM network tolocal office (3G MSC) during the conversation, and the system completes automaticallydifferential processing of MS access mode. For example, encryption mode changes of UMTSand GSM.

Service benefit:

For operators -

If the operator has constructed a GSM network, the construction of 3G network can ensure theseamless roaming and handover of subscriber. The area that is not covered by a network can

be switched to another network smoothly to ensure that the conversation is not affected by

network coverage. Especially for the earlier stage of network construction, there may be manycross-system handovers.


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For subscribers -

z Ensure the conversation quality.

z Avoid call drop of cross-system handover.


z Upgrade GSM network.

WMFD-080302

Function name: Handover from UMTS to GSM

Description:

Support the function: GSM and UMTS dual-mode MS can be switched from UMTS networkto GSM network during the conversation, and the system completes automatically differential

processing of MS access mode. For example, encryption mode changes of UMTS and GSM.For Huawei MSOFTX3000, the subscriber can be switched from UMTS network to GSMnetwork successfully when current GSM network is not upgraded.

Service benefit:

For operators -

If the operator has constructed a GSM network, the construction of 3G network can ensure theseamless roaming and handover of subscriber. The area that is not covered by a network can

be switched to another network smoothly to ensure that the conversation is not affected by

network coverage. Especially for the earlier stage of network construction, there may be manycross-system handovers.

For subscribers -

z Ensure the conversation quality.

z Avoid the call drop during the cross-system handover.


None

WMFD-080600

Function name: Directed retry handoverDescription:

When MSC assigns a traffic channel to a MS, the BSC/RNC initiates the handover to another

BSC/RNC because of lack of resource or weakness of radio signal.



Service benefit:

For operators -

z Facilitate enhancing successful handover ratio.


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For subscribers -

z Reduce the call drop.


None

WMFD-080700

Function name: Signaling handover

Description:

It means the handover when a MS only has signaling connection with network (i.e. trafficchannel not assigned).

Service benefit:

For operators -

z Facilitate enhancing successful handover ratio.

For subscribers -

z The call loss is decreased.


None

WMFD-080900

Function name: Load based handover

Description:

In the case of handover between the 2G system and the 3G system, the cell load informationis carried to other systems to balance the traffic and load of the UMTS network and the GSM

network of operators.

z Intra-office handover from 3G to 2G

If the HANDOVER REQUEST ACKNOWLEDGE message returned to the MSC by the BSCcontains the cell load information, and the MSC configures the RNC to support the functionof cell load-based handover, the MSC transparently transmits the cell load information in

the Iu interface message RELOCATION COMMAND.

z Inter-office handover from 3G to 2G

During an inter-office handover, if the HANDOVER REQUEST ACKNOWLEDGE messagereturned to the MSC-B by the BSC contains the cell load information, the MSC-Btransparently transmits the information to the MSC-A in the E interface message

MAP-Prep-Handover resp. If the MSC-A configures the RNC to support the function of cell

load-based handover, and the MAP-Prep-Handover resp message returned to the MSC-A bythe MSC-B contains the cell load information of the destination side, the MSC-A

transparently transmits it to the RNC in the RELOCATION COMMAND message.

z Intra-office handover from 2G to 3G


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If the RELOCATION REQUEST ACKNOWLEDGE message returned to the MSC by theRNC contains the cell load information, and the MSC configures the BSC to support the

function of cell load-based handover, the MSC transparently transmits the cell loadinformation in the A-interface message HANDOVER COMMAND.

z Inter-office handover from 2G to 3G

During an inter-office handover, if the RELOCATION REQUEST ACKNOWLEDGE

message returned to the MSC-B by the RNC contains the cell load information, the MSC-B

transparently transmits the information to the MSC-A in the E interface messageMAP-Prep-Handover resp. During an inter-office handover, if the MSC-A configures the BSC

to support the function of cell load-based handover, and the MAP-Prep-Handover respmessage returned to the MSC-A by the MSC-B contains the cell load information of the

destination side, the MSC-A transparently transmits it to the BSC in the HANDOVERCOMMAND message of A-interface.


Served network: GSM and UMTSService benefit:

For operators

The function is used to balance the traffic and load of the UMTS network and the GSM

network of operators.

For subscribers

Requirements for pe

Documents

Function Description of Softswitch