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MOTOTRBO TM. LINKED CAPACITY PLUS. Communicate to a large field force across a wide area with a scalable, easy to use system… Wide Area Coverage Links adjoining single sites across an IP Network High Capacity Digital communication for up to 1200 users - PowerPoint PPT Presentation
Citation preview
Module Name 1
Motorola Public Document Classification, Dimetra IP Compact 3.0 to 4.1 DeltaJuly 2011
MOTOROLA SOLUTIONS LEARNING
MOTOTRBOTM
LINKED CAPACITY PLUS
PAGE 2
Communicate to a large field force across a wide area with a scalable, easy to use system…
•Wide Area CoverageLinks adjoining single sites across an IP Network
•High CapacityDigital communication for up to 1200 users using 12 voice paths per site across 5 sites
•Cost EffectiveDoes not require additional hardware
LINKED CAPACITY PLUS VALUE PROPOSITION“Connect More People, In More Locations, For Less”“Connect More People, In More Locations, For Less”
PAGE 3
LINKED CAPACITY PLUS OVERVIEW Combines all the benefits of IP Site Connect and Capacity Plus
Adds CAPACITY to existing IP Site Connect (IPSC) systems Adds COVERAGE to existing Capacity Plus (Cap+) systems
No central controller needed Logic is managed in a distributed fashion like Cap+ Does not use a dedicated control channel Resilient to channel interference Suitable for shared channels
Repeaters (Peers) / sites connected via an IPv4 based network like IPSC Linked Capacity Plus (LCP) requires more bandwidth than IPSC
Consists of up to 5 sites Up to 6 trunked (voice and data) & 3 data revert repeaters per site Same number of repeaters per site not required
Tolerates failures by design The Master repeater is the single point of failure, however this single point
of failure is limited only to the arbitration of IP addresses
PAGE 4
A set of Single-Site Capacity Plus systems +Physical connection like an IP Site System +Some additional software
} = Linked Capacity Plus
BR 11
BR 12
Site 1
BR 13
BR 14
Switch
BR 21
BR 22
Site 2
BR 23
BR 24
Switch
BR 31Master
BR 32
Site 3
BR 33
Switch
Router Router Router
WAN IP Network
System Wide
Master
Rest Channels
Capacity Plus Trunking
IP Site Connect Link Management, Wide Area call processing
Additional Software Dynamically forms an IPSC between the current Rest channels1.Identifies the Rest channel2.Combines the Call set-up procedures (i.e. Arbitration + TRT)
Can use MTR3000 and/or 32MB DR 3000 repeaters (but NOT 8MB DR 3000 repeaters).
LINKED CAPACITY PLUS OVERVIEW
PAGE 5
LINKED CAPACITY PLUS OVERVIEW
Includes the following MOTOTRBO “special” features Enhanced privacy Transmit Interrupt Digital telephone patch GPS (including enhanced) Data applications (ADP interfaces) Option board RDAC
Includes the following trunking system features Selective site light-up:
Dynamic for individual calls Static for talkgroup calls
Automatic subscriber roaming Site restriction
Features
PAGE 6
LINKED CAPACITY PLUS OVERVIEWFeatures
Supports up to 254 Local and Wide Area TALKGROUPS Local and Wide Area Talkgroups
The ID space for Talkgroups is limited to {1..254} A customer can define some of these IDs (say “w”) as Wide Area The remainder of the IDs are Local Local Talkgroup IDs can be reused at different sites Thus, total number of talkgroups = (254 – w) * s + w
(where “s” is the number of sites) No local channels like IPSC No local All Call Talkgroup A Wide Area Talkgroup ID is associated with a set of sites
Enables Statically defined Selective site “light up” for Talkgroup calls A number of channels at each site can optionally be reserved for Wide Area talkgroup
calls. All Wide Area talkgroup repeater configuration parameters are provisioned into the
Master repeater only.
PAGE 7
LINKED CAPACITY PLUS OVERVIEW
LCP data is similar to Cap+… Radio to Radio data is always on a trunked channel Server to Radio data is always on a trunked channel Radio to Server data is either on a trunked or data revert channel Radios share the revert channels
LCP data is similar to IPSC… Supports both local and wide area data revert channels A wide area / local setting is configured into all data revert repeaters A wide area data revert channel is formed by multiple data revert channels (one per
site) sharing a common Channel ID
Initially, LCP supports server data via Control stations ONLY In the future, LCP will also support server data via the repeater IP interface
Features - Data
PAGE 8
Site 1 (Ch ID 33W) Site -2 (Ch ID 33W) Site 3 (Ch ID 33W) Site 4 (Ch ID 33W) Site 5 (Ch ID 33W)
Example System 1
Example System 2
Example System 3
Flexibility for configuring Data Revert Repeater Channel IDs.
Site 1 (Ch ID 33W) Site -2 (Ch ID 33W) Site 3 (Ch ID 33W) Site 4 (Ch ID 35W) Site 5 (Ch ID 35W)
Site 1 (Ch ID 33L) Site -2 (Ch ID 33L) Site 3 (Ch ID 43L) Site 4 (Ch ID 47L) Site 5 (Ch ID 47L)
LINKED CAPACITY PLUS OVERVIEWFeatures - Data
PAGE 9
LCP does not support…
Priority Queuing of CallsRequires a central controller
Priority Monitor* This is however supported for All Call and Emergency call
Subscriber Access ControlWill however be supported in a release later this year
(* this is the ability for radios to leave a call in progress to join a higher priority call)
FeaturesLINKED CAPACITY PLUS OVERVIEW
PAGE 10
LINKED CAPACITY PLUS OVERVIEWSystem Loading
For the purpose of the following: T = Total number of Radios supported by LCP system R = Number of Radios supported by Cap+ system N = Number of trunked channels at the smallest LCP site S = Number of LCP Sites W = Average number of Sites associated with Wide Area Talkgroups L = Number of Local calls as a fraction of the total number of calls
A LCP system handles Local calls as efficiently as Cap+, therefore if all calls are Local, T = the sum of the number of radios supported by each individual site. The number of radios supported by a given LCP site = the number of radios
supported by a Cap+ system having the same number of trunked channels. If there are Wide Area calls, T is estimated by first estimating R for a Cap+ system having
N trunked channels (note: Wide Area calls generally take 240ms longer to start). If all calls are Wide Area, T = R. If there are a mixture of both Local and Wide Area calls, T = R*S (L + (1-L)/W)
PAGE 11
LINKED CAPACITY PLUS OVERVIEW Requires a software upgrade of radios and repeaters
Repeaters must have 32MB of flash memory Compatible with current and next generation MOTOTRBO radios
Requires feature activation in the repeater HKVN4108A DR 3000 Full license key* HKVN4063A DR 3000 Incremental license key (from Cap+) HKVN4109A MTR3000 Full license key* HKVN4070A MTR3000 Incremental license key (from Cap+)
New LCP compatible version of RDAC available GMVN5520F RDAC CD
* The full LCP license does not support Cap+ channels, so if a repeater needs also to support Cap+ channels then a Cap+ / Incr. LCP license combination should be purchased instead.
PAGE 12
Backwards compatibility with Cap+
(1)
An old (non-upgraded) Cap+ radio will only operate on a single LCP site. However, its ID must still be unique across all sites for the LCP system.
(2)
(1)
Old
New
NewOld
Old
New
NewNew
Site 1 Site 2
Local TG Wide Area TG
(1) (2)
(1) Old radios can neither make nor receive Wide Area Individual Calls
(2) Old radios can receive incoming audio targeted to a Wide Area TG but can not transmit audio to a Wide Area TG.
Compatible Individual calls
Compatible Group calls
Incompatible Calls
LINKED CAPACITY PLUS OVERVIEW
PAGE 13
Complete SystemLINKED CAPACITY PLUS COMPONENTS
BR 11
BR 12
Site 1
BR 13
BR 14
Router + Switch
BR 21
BR 22
Site 2
BR 23
BR 24
BR 31Master
BR 32
Site 3
BR 33
WAN IP Network
System Wide
MasterRest Channels
Router + Switch Router + Switch
LAN
Net
wor
k
Data Revert Repeaters (Optional)
BR 34
LAN
Net
wor
k
LAN
Net
wor
k
RDAC PC1
TRNK CSTRNK CS
Conv CSConv CS
PAGE 14
BR 11
BR 12
Site 1
BR 13
BR 14
Router + Switch
BR 21
BR 22
Site 2
BR 23
BR 24
BR 31Master
BR 32
Site 3
BR 33
WAN IP Network
Rest Channels
LINKED CAPACITY PLUS COMPONENTS
Router + Switch Router + Switch
LAN
Net
wor
k
Data Revert Repeaters (Optional)
BR 34
LAN
Net
wor
k
LAN
Net
wor
k
The role of the “Master”
System Wide
Master
RDAC PC1
TRNK CSTRNK CS
Conv CSConv CS
•Requires a static IP address which all repeaters (via their configuration) need to be aware of•Introduces repeaters to each other•Is the single point of failure
•Requires a static IP address which all repeaters (via their configuration) need to be aware of•Introduces repeaters to each other•Is the single point of failure
PAGE 15
If the Master repeater fails…The system continues to functionAdditional repeaters, sites, or host PCs CANNOT be added to the systemA redundant repeater can be switched to act as a Master
LINKED CAPACITY PLUS COMPONENTS
PAGE 16
The role of a Repeater (Peer)
BR 11
BR 12
Site 1
BR 13
BR 14
Router + Switch
BR 21
BR 22
Site 2
BR 23
BR 24
BR 31Master
BR 32
Site 3
BR 33
WAN IP Network
Rest Channels
Router + Switch Router + Switch
LAN
Net
wor
k
Data Revert Repeaters (Optional)
BR 34
LAN
Net
wor
k
LAN
Net
wor
k
LINKED CAPACITY PLUS COMPONENTS
RDAC PC1
TRNK CSTRNK CS
Conv CSConv CS
•Exchange “Keep Alive” messages•Use information to dynamically configure system•Participate in selecting the next Rest Channel•Distribute the voice/data payload to all repeaters
•Exchange “Keep Alive” messages•Use information to dynamically configure system•Participate in selecting the next Rest Channel•Distribute the voice/data payload to all repeaters
PAGE 17
Communication among repeaters
1) LCP repeaters at a given site use IP Limited Broadcast address (255.255.255.255) messages to communicate among each other when managing (for example) the site’s Rest Channel (note: Cap+ repeaters communicate with each other using multiple unicast messages).
2) LCP repeaters at a given site are configured with a common Site IP Address (referred to as the Rest Channel IP Address by the CPS) and the current Rest Channel repeater at the site uses this Site IP Address when sending periodic Keep Alive messages to the other sites.
3) At the start of a new call the source Rest channel repeater does not know which are the current Rest channel repeaters at the other sites. The source Rest channel repeater therefore sends one message to each Site IP Address associated with the call (note: the source Rest channel repeater finds out from the Master repeater which Site IP Addresses to use). When a repeater at a given site receives a Site IP address message, it re-broadcasts this message to the other repeaters at that site using the IP Limited Broadcast address message (note: the repeater that receives the Site IP Address message will normally be the Rest channel repeater unless the Rest channel has changed since the last Keep Alive message was generated). The current Rest Channel repeater at the site then responds to the Site IP address message. This mechanism enables all repeaters involved in a call to learn which are the other repeaters (at the other sites) involved in the same call.
LINKED CAPACITY PLUS COMPONENTS
PAGE 18
BR 11
BR 12
Site 1
BR 13
BR 14
Router + Switch
BR 21
BR 22
Site 2
BR 23
BR 24
BR 31Master
BR 32
Site 3
BR 33
WAN IP Network
Rest Channels
LINKED CAPACITY PLUS BACK END NETWORK
Router + Switch Router + Switch
LAN
Net
wor
k
Data Revert Repeaters (Optional)
BR 34
LAN
Net
wor
k
LAN
Net
wor
k
LAN Network
RDAC PC1
TRNK CSTRNK CS
Conv CSConv CS
•Repeaters at a site are connected over a LAN like Cap+•Repeaters use an IP Limited Broadcast address to communicate with all repeaters at its site•Only LCP repeaters should be present on the LAN
•Repeaters at a site are connected over a LAN like Cap+•Repeaters use an IP Limited Broadcast address to communicate with all repeaters at its site•Only LCP repeaters should be present on the LAN
PAGE 19
BR 11
BR 12
Site 1
BR 13
BR 14
Router + Switch
BR 21
BR 22
Site 2
BR 23
BR 24
BR 31Master
BR 32
Site 3
BR 33
WAN IP Network
Rest Channels
LINKED CAPACITY PLUS BACK END NETWORK
Router + Switch Router + Switch
LAN
Net
wor
k
Data Revert Repeaters (Optional)
BR 34
LAN
Net
wor
k
LAN
Net
wor
k
WAN IP Network
RDAC PC1
TRNK CSTRNK CS
Conv CSConv CS
•An IP Network is used for voice/data communication between sites like IPSC•Requires greater bandwidth (compared to IPSC) from ISP provider
•An IP Network is used for voice/data communication between sites like IPSC•Requires greater bandwidth (compared to IPSC) from ISP provider
PAGE 20
BR 11
BR 12
Site 1
BR 13
BR 14
Router + Switch
BR 21
BR 22
Site 2
BR 23
BR 24
BR 31Master
BR 32
Site 3
BR 33
WAN IP Network
Rest Channels
LINKED CAPACITY PLUS BACK END NETWORK
Router + Switch Router + Switch
LAN
Net
wor
k
Data Revert Repeaters (Optional)
BR 34
LAN
Net
wor
k
LAN
Net
wor
k
Router + Switch
RDAC PC1
TRNK CSTRNK CS
Conv CSConv CS
All repeaters (and only the repeaters) at a site must be behind a router and a switch
All repeaters (and only the repeaters) at a site must be behind a router and a switch
PAGE 21
1) The Master repeater is the only repeater which must have a static IPv4 address, the other repeaters (and RDAC applications) may have either static or dynamic IP IPv4 addresses.
2) Since LCP repeaters at a given site use IP Limited Broadcast address messages to communicate among each other, then:
- All repeaters pertaining to a given site must be behind a single Ethernet Switch/Router- This is because IP Limited Broadcast address messages never get forwarded by a
site’s router to the WAN.- The only devices that can be on the site’s LAN are the repeaters pertaining to that site
(and any RDAC applications)- This is because IP Limited Broadcast address messages (which are received by
all devices on the LAN) could have an undesired effect on other devices.- Hairpinning routers generally* do not need to be used
- Again, this is because IP Limited Broadcast address messages never get forwarded by a site’s router to the WAN.
* A Hairpinning router must be used at a site if that site contains multiple LCP devices and one of these devices is either a Master repeater or an RDAC application, since:
i. Peers need to address the Master repeater using its WAN address.
ii. An RDAC application communicates directly with repeaters (rather than using IP Limited Broadcast address messages).
LINKED CAPACITY PLUS BACK END NETWORK Considerations
PAGE 22
3) If no more than 3 repeaters per site need to be supported, then the “D Link EBR2310” Ethernet Switch/Router should be sufficient.
4) For expanding the number of switch ports, the “HP Procurve 2510-24 (J9019B)” Ethernet Switch can be used in conjunction with the EBR-2310 Router.
5) The CISCO ASA-5505 (8 port) Switch/Router can also be used.
6) For a customer LAN, no Public IP address is required if a Remote IP network connection is not required from any other public network. If for example RDAC is required to be connected from the Public system without using a VPN configuration, then one Public static IP address is required.
7) Once the IP network is setup and rigorously tested (bandwidth analysis etc.), it is advisable not to change or keep changing IP network configuration. Overall quality and reliability of the LCP system is highly dependent upon a stable IP network.
8) Refer to the System Planner for details on how to calculate the bandwidth requirements of the backend network.
LINKED CAPACITY PLUS BACK END NETWORK Considerations
PAGE 23
LINKED CAPACITY PLUS PROCEDURES All Start
A Wide Area Talkgroup call only starts if channels are available at all associated sites Local calls can capture all the trunked channels at a site, leaving no channels
available for Wide Area Talkgroup calls. To overcome this, LCP allows a configurable number of channels at each site to be reserved for Wide Area Talkgroup calls.
Call queuing is not supported, however a radio tries up to 3 times to setup a call with random delays inserted in between each attempt.
Selective Site Light Up for Individual Calls An Individual call setup goes out on all sites where a channel is available. These sites all attempt a high-speed handshake (called “RTR”) with the target radio. The site that succeeds with the high-speed handshake and the site where the
initiating radio is located remain in the call while the other sites drop out. If the initiating and target radios are on the same site this leaves 1 site involved in the individual call and if the initiating and target radios are on different sites this leaves 2 sites involved in the individual call.
The high-speed handshake occurs concurrently with the call set-up, so no additional delay.
PAGE 24
LINKED CAPACITY PLUS PROCEDURES
Start of a Call “TRT” in Cap+ restricts the effect of collisions. “Arbitration” in IPSC ensures that all the sites select the same call. LCP improves and combines these two processes into a single process called “TR-A-
RT”. This process can also allocate the channels for up to 5 concurrent calls (each
occurring at separate sites) in one arbitration. The Wide Area Call setup time for LCP is approximately 240 ms more than for Cap+
(this increases where more than 2 concurrent calls need to be allocated). The Local Call setup time for LCP is same as for Cap+. LCP supports Digital Telephone Patch Calls.
A radio can receive an incoming telephone call on any site, however a radio can only initiate an outgoing telephone call on a site connected to an APP (i.e. a radio can not initiate a telephone call via an APP connected to a different site).
PAGE 25
1. A radio starts a call on an idle Rest ChannelThe radio transmits a burst over the air and waits for the response from the Rest Channel.
Note: If two or more radios at a site start calls at the same time their call starts will collide, the Rest Channel repeater may not receive the transmission correctly and will not provide a response. If the radio does not get the response from the Rest Channel repeater it will retry after a random delay.
LINKED CAPACITY PLUS PROCEDURESWide Area Group Voice Call
WAN IP Network
Site 1
RouterSwitch
RouterSwitch
BR 11
BR 12
BR 13
BR 14
Site 2
BR 21
BR 22
BR 23
Site 3
BR 32
BR 31
BR 33
BR 34
RouterSwitch
Master
1
PAGE 26Note: Each site has a common IP address. A message addressed to the common IP address is received by all the repeaters at the site.
LINKED CAPACITY PLUS PROCEDURESWide Area Group Voice Call
WAN IP Network
Site 1
RouterSwitch
RouterSwitch
BR 11
BR 12
BR 13
BR 14
Site 2
BR 21
BR 22
BR 23
Site 3
BR 32
BR 31
BR 33
BR 34
RouterSwitch
Master
2b
2a
2c
2. When a burst is received the Rest Channel repeatera. Selects the next Rest channel (like Cap+) and informs the start of the call and the new Rest Channel to all
repeaters at the site.b. Tells the radio its call is conditionally accepted, starts an “arbitration window” (the duration depends on
the inter-repeater delay) and asks the radio to wait for the final acceptance.c. Invites the Rest Channels at the other sites to join the call (invitations sent using site common IP
addresses).
PAGE 27
3. When an invitation is received from the source repeater, the Rest Channel at the destination sitesa. Select the next Rest channel and inform the start of the call and the new Rest Channel to all
repeaters at their sites.b. Inform the non-participating radios the Rest Channel has changed.c. Accepts or Rejects the invitation depending on the channel availability at its site.
LINKED CAPACITY PLUS PROCEDURESWide Area Group Voice Call
WAN IP Network
Site 1
RouterSwitch
RouterSwitch
BR 11
BR 12
BR 13
BR 14
Site 2
BR 21
BR 22
BR 23
Site 3
BR 32
BR 31
BR 33
BR 34
RouterSwitch
Master
3a
3c
3b 3b3a
PAGE 28
4. During the “arbitration window”, if the source repeater receives no rejections from the sites associated with the talkgroup then it informs the source radio to start the call. If one or more rejections are received, then the source repeater asks the source radio not to start the call.
LINKED CAPACITY PLUS PROCEDURESWide Area Group Voice Call
WAN IP Network
Site 1
RouterSwitch
RouterSwitch
BR 11
BR 12
BR 13
BR 14
Site 2
BR 21
BR 22
BR 23
Site 3
BR 32
BR 31
BR 33
BR 34
RouterSwitch
Master
4
PAGE 29
5. When permission is received to start a calla. The source radio transmits a voice header followed by a voice burst every 60ms.b. The source repeater sends the header/bursts to all repeaters participating in the call.c. The destination repeater transmits the received header/bursts over the air.
LINKED CAPACITY PLUS PROCEDURESWide Area Group Voice Call
WAN IP Network
Site 1
RouterSwitch
RouterSwitch
BR 11
BR 12
BR 13
BR 14
Site 2
BR 21
BR 22
BR 23
Site 3
BR 32
BR 31
BR 33
BR 34
RouterSwitch
Master
5a
5b
5c 5c
PAGE 30
Steps 1 to 4a of a Private Voice Call are the same as a Wide Area Group Voice Call.4b. The destination repeaters ask the destination radio to respond by transmitting a query over the air.4c. If the destination radio is present then it responds.4d. If the destination repeater does not receive a response, it informs the source repeater it is not interested
in participating in the call.
S: Source RadioD: Destination Radio
LINKED CAPACITY PLUS PROCEDURESPrivate Voice Call
D
S
WAN IP Network
Site 1
RouterSwitch
RouterSwitch
BR 11
BR 12
BR 13
BR 14
Site 2
BR 21
BR 22
BR 23
Site 3
BR 32
BR 31
BR 33
BR 34
RouterSwitch
Master
4a
4b
4b
4c
X4d
PAGE 31
5. When permission is received to start a calla. The source radio transmits a voice header followed by a voice burst every 60ms.b. The source repeater sends the header/bursts to at most one repeater (i.e. the repeater which did
not send a rejection).c. The destination repeater transmits the received header/bursts over the air.
S: Source RadioD: Destination Radio
LINKED CAPACITY PLUS PROCEDURESPrivate Voice Call
WAN IP Network
Site 1
RouterSwitch
RouterSwitch
BR 11
BR 12
BR 13
BR 14
Site 2
BR 21
BR 22
BR 23
Site 3
BR 32
BR 31
BR 33
BR 34
RouterSwitch
Master
S
D
5a
5b
5c
PAGE 32
1. A radio starts a Wide Area All Call on an idle Rest ChannelSteps 1 to 4a are the same as a Wide Area Group Call.
E : Radios participating in an Emergency CallTG: Radios participating in a Talk Group Call
LINKED CAPACITY PLUS PROCEDURESWide Area All Call
WAN IP Network
Site 1
RouterSwitch
RouterSwitch
BR 11
BR 12
BR 13
BR 14
Site 2
BR 21
BR 22
BR 23
Site 3
BR 32
BR 31
BR 33
BR 34
RouterSwitch
Master
A
E
E E
1
Note: LCP does not support Local All Call.
PAGE 33
4b. The start of a Wide Area All Call is announced on the Traffic and Rest Channels of all sites4c. All radios receiving non-emergency calls move to the channels where the Wide Area All Call is in
progress. These radios make a late entry into the Wide Area All Call.
E : Radios participating in an Emergency Call
LINKED CAPACITY PLUS PROCEDURESWide Area All Call
WAN IP Network
Site 1
RouterSwitch
RouterSwitch
BR 11
BR 12
BR 13
BR 14
Site 2
BR 21
BR 22
BR 23
Site 3
BR 32
BR 31
BR 33
BR 34
RouterSwitch
Master
E
E E
4a
4b 4b
4b
PAGE 34P: Radio initiating a call to a phone
Note: If there is no idle phone capable channel at the site, the radio retries after a random delay
LINKED CAPACITY PLUS PROCEDURESPhone Call (Radio to Phone)
WAN IP Network
Site 1
RouterSwitch
RouterSwitch
BR 11
BR 12
BR 13
BR 14
Site 2
BR 21
BR 22
BR 23
Site 3
BR 32
BR 31
BR 33
BR 34
RouterSwitch
Master
1
P
Phone Patch
Phone Patch
2
P P
LCP supports only Private Radio to Phone Calls (i.e. no Talkgroup Radio to Phone Calls).A radio can only initiate a phone call at a site where there is at least one Phone Patch device.1. A radio starts a Phone Call on an idle Rest Channel by transmitting a burst over the air2. The Rest Channel provides the current status (i.e. busy or idle) of all “phone capable”
channels at the site.
PAGE 35
3. A radio moves to an idle phone capable channel and initiates a phone call.4. The remaining steps are the same as for Private Voice Call.
P: Radio initiating a call to a phone
LINKED CAPACITY PLUS PROCEDURESPhone Call (Radio to Phone)
WAN IP Network
Site 1
RouterSwitch
RouterSwitch
BR 11
BR 12
BR 13
BR 14
Site 2
BR 21
BR 22
BR 23
Site 3
BR 32
BR 31
BR 33
BR 34
RouterSwitch
Master
Phone Patch
Phone Patch
P
3
P P
PAGE 36
LCP supports both Private and Group Phone to Radio Calls.1. When a phone call is received, the Phone Patch activates the “PTT Line”, and the repeater requests,
receives and verifies the DTMF digits.2. The repeater checks for an idle slot, and if a slot is idle starts the call.3. The source repeater invites the Rest Channels at the destination sites to join the call.4. After the “arbitration window”, the Rest Channel announces the start of the phone call.
P: Radio initiating a call to a phone Note: If there is no idle phone capable channel at the site, the radio retries after a random delay
LINKED CAPACITY PLUS PROCEDURESGroup Phone Call (Phone to Radio)
WAN IP Network
Site 1
RouterSwitch
RouterSwitch
BR 11
BR 12
BR 13
BR 14
Site 2
BR 21
BR 22
BR 23
Site 3
BR 32
BR 31
BR 33
BR 34
RouterSwitch
Master
1
P
Phone Patch
Phone Patch
4
4
3
4 4
P P
PAGE 37
5. The participating radios at the source site moves from the Rest Channel to the Phone Channel.6. The Rest Channels at the destination sites move.7. The Non-participating radios move to the new Rest Channels.
P: Radio initiating a call to a phone
Note: If there is no idle phone capable channel at the site, the radio retries after a random delay
LINKED CAPACITY PLUS PROCEDURESGroup Phone Call (Phone to Radio)
WAN IP Network
Site 1
RouterSwitch
RouterSwitch
BR 11
BR 12
BR 13
BR 14
Site 2
BR 21
BR 22
BR 23
Site 3
BR 32
BR 31
BR 33
BR 34
RouterSwitch
MasterP
Phone Patch
Phone Patch
PP
PAGE 38
1. An emergency call starts just like a talkgroup call unlessa. An Emergency Call to the same talkgroup is already in progress, in which case the call starts over the same
channels either politely (after interrupting the ongoing call) or impolitely.b. A Rest Channel at a site is not idle, in which case the Rest Channel drops the ongoing call and participates in
the Emergency Call
LINKED CAPACITY PLUS PROCEDURESEmergency Voice Call
Site 1
BR 11
BR 12
BR 13
BR 14
Site 2
BR 21
BR 22
BR 23
Site 3
BR 32
BR 31
BR 33
BR 34S
Site 1
BR 11
BR 12
BR 13
BR 14Site 2
BR 21
BR 22
BR 23
Site 3
BR 32
BR 31
BR 33
BR 34E
This figure shows the state before the initiation of the emergency call. A radio a site 3 is sourcing an interruptible call for the emergency talkgroup.
This figure shows the state after the initiation of the emergency call by a radio at site 1. Note that the Rest channels do not change and the radio at site 3 has stopped its transmission.
PAGE 39
LCP only uses impolite channel access for emergency calls (where necessary).
When a repeater detects an impolite call it updates the system call status to the new call.
LCP frees up channels at associated sites (if necessary) during an emergency call setup.
The start of an emergency call is announced over all busy channels at all associated sites, thereby allowing radios to leave their current calls and join the emergency call (where applicable).
After setting up an emergency call, if there are no free channels left at a site then the busy rest channel shifts to a channel where there is a non emergency call in progress (thus ensuring that one emergency call does not clear down another emergency call).
Radio on Traffic
channel?
Emergency Call transmitted over ongoing Emergency Call because receiving radios already on channel.
Emergency Call transmitted on Idle Rest channel.
Emergency Call for same
Talkgroup already active?
Rest Channel Idle?
Call on busy Rest Channel interruptible?
Transmit interrupt used to stop ongoing call. Emergency Call then transmitted on Idle Rest channel.
Emergency Call transmitted impolitely over busy Rest channel.
Yes
Yes
Yes
No
No
No
No Yes
User initiation of Emergency
Move to Rest Channel
LINKED CAPACITY PLUS PROCEDURESEmergency Voice Call
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To minimise the amount of Beacon signalling An LCP (Roaming) Beacon is appended to every 5th Cap+ (Lost Signal Detection) Beacon
To facilitate faster scanning The Rest Channels at all the sites synchronise their Beacons The LCP (Roaming) Beacons at a given site contain a list of Rest Channel IDs for that site’s neighbouring sites
Radios use the list of Rest Channel IDs for a site’s neighbouring sites to determine which channels to scan when trying to roam using either Passive or Active Site search
The list of neighbouringsites for each site isconfigured only into theMaster repeater (note:the Master repeatershares this informationwith all the otherrepeaters in the system)
Site 1 Rest Channel
LCP Beacon
5 * Cap+ Beacon IntervalCPS Configurable Interval
Cap+ Beacon
Site 2 Rest Channel
Site 3 Rest Channel
Site 4 Rest Channel
Site 5 Rest Channel
LINKED CAPACITY PLUS PROCEDURESRoaming
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For LCP a radio builds up a sorted roam list based on the LCP (Roaming) Beacons channels transmitted on the home site’s Rest Channels.
While the home site signal strength remains above a programmable threshold, the radio remains on the home site.
If the home site signal strength drops below a programmable threshold, then the radio starts to scan through the sorted roam list for a new site The radio only scans for a new site while in the idle state (e.g. it does not scan for a new
site while still receiving a call of interest on the current site). Also, the radio does not scan for a new site if the radio’s Site Lock feature is enabled.
During a Passive Site search, the radio identifies the site with the strongest signal and then makes that site its new home site.
If a better site is not found, then the radio remains on the current home site and continues scanning.
While a radio is carrying out a Passive Site Search, it needs to leave its current home site for short durations which may cause the radio to miss activity on its home site (resulting in late entry to voice calls, or missed control/data). To minimise missed activity, the programmable threshold should not be configured too
high. Additionally, a user may suspend automatic roaming using the Site Lock feature (this is
particularly useful if the radio is stationary and the user is satisfied with the quality of service from the current home site).
LINKED CAPACITY PLUS PROCEDURESRoaming – Passive Site Search (Automatic Roaming)
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Active Site Search consists of the radio sending wake-up messages to each site in its sorted roam list (which it builds up from the LCP Beacons) until it finds an active site.
Active Site Search is initiated as follows: When the radio initiates a transmission and it’s home site rest channel repeater can not be
woken. Or, when the user initiates a Manual Site Roam (either using the menu or a programmable
button). On waking a repeater, the radio synchronises itself with the repeater, completes the
transmission and makes the new site its home site. If the end of the sorted roam list is reached and a site is not found, the radio provides the user
with a failure indication. Active Site Search does not necessarily find the best site, but rather allows the radio to move
to the next “in range” site. Radios only transmit a single (polite) wake up message to any given repeater, however there
may still be regulatory reasons why it might not be desirable for a radio to transmit wake up messages on each of its sorted roam list member’s frequencies until a site is found. Where this is the case, then radios should be configured with Active Site Search disabled.
LINKED CAPACITY PLUS PROCEDURESRoaming – Active Site Search
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Out of range state(Same as Cap+)
Unlock state
Roaming Icon: Radio not in locked state. It will disappear after the user locks the site.
Channel name
Press PB to lock site
Turn on repeaters
Lock State
Radio’s LED will flash yellow if radio in system busy or local system busy state
LINKED CAPACITY PLUS USER INTERFACEHome Screen
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Press site button to display site alias
Site AliasSite Number
Press PB to find site
Cannot find site
SuccessfullyFound Site
LINKED CAPACITY PLUS USER INTERFACESite Information
Press Programmable Button to display site alias
Press Programmable Button to find site
PAGE 45
Select Master or Peer
Similar Configuration to Cap+(note: the LCP beacon interval is five times the Cap+ beacon interval and the LCP beacon duration consists of a single burst appended to every 5th Cap+ beacon)
LINKED CAPACITY PLUS CONFIGURATIONRepeater - Network
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Wide Area Talkgroups are associated with a set of sites Enables statically defined Selective Site “Light-Up” Any Talkgroup not defined in this table is assumed to be a Local Talkgroup Subscribers do not need Wide Area or Local Talkgroup categorization
These parameters are configured in one repeater only (the “Master”)
LINKED CAPACITY PLUS CONFIGURATIONRepeater - Talkgroups
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Channels at each site can be reserved for Wide Area Talkgroups only Neighbouring sites for each site are defined
Neighbouring sites are overlapping sites only and speed up automatic roaming These parameters are configured in one repeater only (the “Master”)
Site 4
Site 5
Site 6
Site 1
Site 3Site
2
Site Id Neighboring Sites List1 2, 32 1, 33 1, 24 55 4, 66 5
LINKED CAPACITY PLUS CONFIGURATIONRepeater - Talkgroups
PAGE 48
LINKED CAPACITY PLUS CONFIGURATIONRepeater - Channel
PAGE 49
LCP Personalities
Channel lists for each site
Site list for all sites
LINKED CAPACITY PLUS CONFIGURATIONSubscriber - Overview
PAGE 50
Defines channels at given site
LINKED CAPACITY PLUS CONFIGURATIONSubscriber – Channel Lists for each site
PAGE 51
Defines threshold for radio to activate roaming
Defines all sites on which radio is required to operate
Using different RX Group Lists for different sites enables the radio to belong to a site’s Local Talkgroups when the radio roams to that site.
Using different RX Group Lists for different sites enables the radio to belong to a site’s Local Talkgroups when the radio roams to that site.
LINKED CAPACITY PLUS CONFIGURATIONSubscriber – Site List for all sites
PAGE 52
Defines all sites on which the radio is required to operate
LINKED CAPACITY PLUS CONFIGURATIONSubscriber – LCP Personalities
PAGE 53
Buttons can be configured for:Locking the siteRoaming to another siteChecking the site alias
LINKED CAPACITY PLUS CONFIGURATIONSubscriber – Programmable Buttons
PAGE 54
Subscriber and repeater beacon intervals need to be the same. For Cap+, subscriber beacon interval needs to be higher than repeater beacon interval.
Data revert repeater requires Channel ID in the range 33 to 253. Cap+ and IPSC data revert repeaters do not require Channel ID configurations.
RX Group List needs to be configured for each site. For Cap+ and IPSC, RX Group List is defined at a Personality / Channel level. If Contact name for selected Radio Personality corresponds to a talkgroup, then Radio
automatically listens for this talkgroup regardless of whether it’s contained in the RX Group List.
Data revert channels need adding to Subscriber Data Channel Lists. Enables radio to select appropriate data revert channels at a given site.
Radio IDs across system need to be unique. Includes Radio IDs for Repeaters, Subscribers and RDAC devices. Otherwise system will not function properly.
Radio personality only needs to be configured for sites on which radio will operate. No need to add all system sites to radio personality.
LINKED CAPACITY PLUS CONFIGURATIONImportant things to remember