3G Network Control Scenarios

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Network Controlled NetworkSelection and 3g Network

scenarios

SUBMITTED

BYRAJEEV DUBEYSr. ENGINEER



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• IEEE 802.21 MEDIA INDEPENDENT HANDOVER

• DCN:

• Title: Network Controlled Network Selection and HOscenarios

• Date Submitted: September, 2005

• Presented at IEEE 802.21 session #NN in Orange County, CA

• Authors or Source(s):

Srinivas Sreemanthula, Stefano Faccin

• Abstract: Discuss network controlled scenarios



IEEE 802.21 presentation release statements

• This document has been prepared to assist the IEEE 802.21 Working Group. Itis offered as a basis for discussion and is not binding on the contributingindividual(s) or organization(s). The material in this document is subject tochange in form and content after further study. The contributor(s) reserve(s)the right to add, amend or withdraw material contained herein.

• The contributor grants a free, irrevocable license to the IEEE to incorporate

material contained in this contribution, and any modifications thereof, in thecreation of an IEEE Standards publication; to copyright in the IEEE’s nameany IEEE Standards publication even though it may include portions of thiscontribution; and at the IEEE’s sole discretion to permit others to reproduce inwhole or in part the resulting IEEE Standards publication. The contributor alsoacknowledges and accepts that this contribution may be made public by IEEE802.21.

• The contributor is familiar with IEEE patent policy, as outlined in Section 6.3of the IEEE-SA Standards Board Operations Manual<http://standards.ieee.org/guides/opman/sect6.html#6.3> and inUnderstanding Patent Issues During IEEE Standards Development http://standards.ieee.org/board/pat/guide.html>

http://standards.ieee.org/guides/opman/sect6.html


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Introduction

• 802.21 aids in inter-technology handover with various usage

scenarios in mind• It is also important for 802.21 to provide tools for cellular and

other operators to exercise network control to inter-work andmaximize the resource pool in other access networks

• This slide set presents network controlled usage scenarios for Inter-technology network selection and HO control as a means tounderstand the importance of such use cases

• This is for informational purposes only that can be used to verify

these scenarios are indeed covered under 802.21



802.21 vs Current 3GPP Mechanisms

• Access Control/ Network selection:

• Currently core functionality of 3GPP networks• It is in the interest of several 3GPP parties in keeping access control between

3GPP (access) networks under its control• This can be achieved while introducing enablers for seamless inter-technology

mobility using 802.21• 802.21 focuses on aiding heterogeneous handoff (I.e. inter-technology handoff

e.g. 3GPP-802.11, 802.11-802.16, etc.)• The only intra-technology handoff in scope is inter-subnet/inter-domain handoff for 802.11,

simply because 802.11 does not define it• 3GPP/PP2 and 802.16 have their own access selection mechanisms for homogeneous

handoff, and 802.21 does not intend to interfere with that

• 3GPP-WLAN IW: current Network Selection mechanisms

• Based on policies and information stored in UE (SIM)• Based on information collected from UE• Network has no active role at moment of selection• Issue: cumbersome mechanism, requires connecting to a network to decide

whether to connect to the network



802.21 Usage Scenarios for 3GPP

• A set of example “access system selection” scenarios to describe

what can be achieved with 802.21

• Scenarios using 802.21 service are split between twodimensions

• Network Selection &• Handover control

• Terminology• 3G-PDN: indicates the whole network (including AN and

core network, i.e. up to point where UE gets IP connectivity)• MME: Mobility Management Entity

• It’s a network entity sitting “above” current 3GPP access (e.g. located“after” the ISN) in charge of making connectivity decision for network controlled handoff.

• MME may incorporate an instance of MIHF



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Usage Scenarios for 3G Cellular Network -> IEEE 802.xScenario-A: 3G network is MIH unaware

• Scenario-A) MIH unaware serving network (3G),

• Emphasis is on enabling network handoff control by home network or third party (e.g. enterprise)

• Examples are• Visited 3G network not 802.21 aware (no 802.21 specific functions in 3G network)

• Visited 3G network has no active control over vertical HO decisions• Home network or 3rd party controls the network selection and HO decisions (IS, ES and CS

used)

Visited3G-PDN

GERANUTRAN WiMAXPDN

802.16-AN802.11-AN

Internet

MIHFNW MIHFNW

Current active connection

Access to MIHF (IS) over L3

“Home” Network

MIHFNW

Access to MIHF (IS/ES/CS) over L3

UE

MIHFUE



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Usage Scenarios for 3G Cellular Network -> IEEE 802.xScenario-B: 3G network is MIH aware, provides IS, ES & CS

• Scenario-B) MIH services provided by serving network (3G),

• Emphasis is on enabling network handoff control by network operator (e.g.home) to target access owned by the same operator

• Examples are• Operator owning multiple access technologies and user belongs to this network • Operator has roaming agreements to cover multiple accesses for users from other networks

• 3G network can control network selection and HO decisions at MME

Home3G-PDN

GERANUTRAN WiMAXPDN

802.16-AN802.11-AN

Internet


Access to MIHF over L3

UE

MIHFUE

MIHFNW MME

Note: MIHF can be physically implemented as a set of MIHF.MME can be more or less centralized



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Usage Scenarios for 3G Cellular Network -> IEEE 802.xScenario-C: 3G network proxies MIH IS services, provides ES and CS

• Scenario-C) MIH IS services proxied by serving network (3G)

• Emphasis is on enabling network handoff control by network operator (e.g. home) totarget accessed owned by roaming partners• Proxy is to access IS from other networks• Examples are

• Operator has no agreements to cover multiple accesses for roaming users

• 3G network controls vertical HO decisions

Home3G-PDN

GERANUTRAN WiMAXPDN

802.16-AN802.11-AN

Internet

MIHFNW


MIHFNW

MIHFNW

UE

MIHFUE

Access to MIHF IS over L3

Access to MIHF IS over L3

Access to MIHF IS , ES and CS over L3



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NW Initiated NW Selection for Scenario-B3G->802.x: 3G provides all MIH services

Scan(802.11)

MAC Layers

Beacon

3G-PDN MME 802.16-AN 802.11-ANMIHFUEMIH User

UE

MIH-Register-Events.Req

DL-Burst*

Link-Detect

MIH-Info.Resp

MIH-Link-Event.Detect(link_info)

MIH-Info.Req

Link-Detect

802.11-AN

Beacon

MIHFNW MIHFNW(IS)

MIH-Register-Event.Resp()

Link-Event.Detect(link_info)

Network Operator


MIH-Register-Event.Req()

MIH-Register-Events.Resp

MIH-Info.Resp


MIH-Info.Req

UnfavorableNetwork

Favorable

Network =>Selection

UE Discovery and attachment



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NW Initiated NW Selection for Scenario-C3G->802.x: 3G provides ES/CS services and can proxy IS services

MAC Layers

Beacon

3G-PDN MMEMIHFUEMIH user

UE

MIH-Register-Events.Req

DL-Burst*

Link-Detect

MIHFNW MIHFNW(IS)

MIH-Register-Event.Resp()

Network Operator


MIH-Register-Event.Req()

MIH-Register-Events.Resp


802.11 Network

802.11-AN MIHFNW(IS)

802.16 Network

MIHFNW(IS)802.16-AN

Link-Detect



MIH-Info.ReqMIH-Info-Req()

MIH-Info-Resp(nwk_info)

MIH-Info.Resp

MIH-Info-Req()

MIH-Info-Resp(nwk_info)

FavorableNetwork =>Selection

Just one Link Event may be generated,

eporting both events

Proxying: MME in operator networkqueries the MIHF in other networksbased on the report from the UE.

UE Discovery and attachment



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NW Controlled HO for Scenarios B&C3G ->802.x. HO Control in 3G with MIH ES/CS services

3G-MM 3G-PDNMIHFUE

UE

Mobile-IP

Operator Network

HA

802.11 Network

New-FA802.11-AN

MIH-Link-Switch.Req(802.11 nwk)

MIH-Remote-Link-Switch.Req(802.11 nwk)

L2-Procedures (Security, Re-association, QoS Neg.)

Link-Event-Down(3G)

Link-Event-Up(802.11 nwk)

MIH-Link-Event-Up

Registration-Req

Registration-Resp

Registration-Req

Registration-Resp

MIP-switch.Ind

802.11 MAC

MIH-Remote-Link-Switch.Resp

L2-PDP-Cntxt-Rel(3G GMM)

MIH-Link-Event-Down

3G-PDP-Rel()

Previously happened

Mobile-IP Tunneling

Mobile-IP SignalingNon-MIH (I.e.Implementationdependent)

Legenda

MMEMIHFNW

MIH-Link-Switch.Resp(802.11 nwk)

NetworkSelection

MIH-switch.req

Link-Associate

MIH-switch.resp

Documents

3G Network Control Scenarios