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8 BSS21440 Packet Abis over TDM

8 BSS21440 Packet Abis over TDM

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Flexi EDGE BTS Feature Descriptions



to employ feature BSS21335 Precise Paging. Furthermore, the Precise Paging feature

also provides a positive effect for the end user experience during network busy periods.

Furthermore, the feature (and licence key for) RG301720, IUA ISDN Q.921-User Adaptation is required and must be activated before the Packet Abis feature is activated.

Requirements











DN70124104



The features (and licence key for) BSS21323, L3 Connectivity for Flexi BSC product

family and BSS21335 Precise Paging are required. The feature (and licence key for)

RG301720, IUA ISDN Q.921-User Adaptation is also necessary. The BSC3i

1000/2000 or Flexi BSC with ETP and a new version of ETS2 interface module are

required:

• The PCU2-D or PCU2-E is required. The PCUs utilised for Packet Abis should

be introduced into different tracks within a BCSU from those which are used for

Legacy Abis.

• BSC3i 1000 (one cabinet): 2+2 ETP Modules.

• BSC3i 2000 (two cabinets): 6+6 ETP Modules.

• Flexi BSC: 6 + 6 ETP Modules.

• With the ETP Module, the LAN switch extension for BSC3i 1000/2000 and Flexi

BSC with the latest LAN switch version (ESB24-D) is necessary.

• When using the ETP Module with the BSC3i 1000/2000, the BCSU CPU

memory requirement is 1 GB and not the 512 MB that is possible for other configuration scenarios.

The FIEA, FIPA, FIFA, FIYA or FIQA Module is required for the Flexi EDGE (or Flexi

Multiradio) BTS. The FIYB and FIQB modules may also be utilised.

The feature is supported with RG20(BSS) EP1.



Id:0900d8058093ddcb

Confidential



161



Flexi EDGE BTS Feature Descriptions



8.9



BSS21439 Packet Abis Sync. ToP IEEE1588v2

The feature “BSS21439 Packet Abis Sync. ToP IEEE1588v2” takes care of synchronization of the traffic in BSS transmission using Packet Abis over Ethernet with the transmission sub-modules FIYB and FIQB in the System Module (ESMA). Timing over

Packet (IEEE1588v2) is a transparent synchronization solution for packet-switched networks, where a standardized protocol is employed to transparently synchronize the

base stations across Layer 2 or Layer 3 networks. The protocol utilized is IEEE1588v2

(also known as the Precision Timing Protocol (PTP)). The Timing over Packet (ToP)

server clock is located at the BSC and provides the synchronization information to the

BTSs at the sites. The integrated BTS capability (or ToP Slave Clock) recovers the clock

signal from the Timing over Packet data it receives.

Since no external equipment (GPS receiver) or E1 link is necessary for synchronization

at the BTS site, capital expenditure savings can be derived. Further, there is also the

possibility to employ a single timing server (Master) solution for both WCDMA and

GSM/EDGE networks. Operational expenditure savings result from the improved bandwidth efficiency beyond that which is achievable with CESoPSN Adaptive Timing. Furthermore, this solution is more robust to network impairments than Adaptive Timing,

thus lower quality packet-switched networks can be employed for the transport backhaul

solution.

Requirements











162



BSC S15

Flexi EDGE BTS EX4.0 with FIQB/FIYB transmission sub-module

NetAct OSS 5.2 CD Set 3

BSC (BSC3i 1000 (one cabinet): 2+2 ETP Modules, BSC3i 2000 (two cabinets): 6+6

ETP Modules, Flexi BSC: 6 + 6 ETP Modules, ETP interface modules required, with

the ETP Module, the LAN switch extension for BSC3i 1000/2000 and Flexi BSC with

the latest LAN switch version (ESB24-D) is necessary)



Id:0900d8058093ddcc

Confidential



DN70124104



Flexi EDGE BTS Feature Descriptions



8.10



BSS10045 Dynamic Abis allocation

Dynamic Abis provides an efficient transport mechanism for GPRS and EGPRS to use

more than one 16 kbps subchannel on the Abis interface for each packet data channel

(PDCH) on the Air interface. The continuous areas of PCM timeslots on PCM links are

configured as Dynamic Abis pools (DAPs) to provide the needed capacity.

The dual TRX modules support two carriers, each of which belongs to one logical TRX.

Each logical TRX utilising Dynamic Abis is associated with a DAP in addition to the

standard fixed traffic channel (TCH) area. Any packet data channel would be continuously using a master PCU channel located on a fixed area. Depending on the traffic load

on each Air interface channel, more capacity would be allocated from the DAP. See the

table below for the number of 16 kbps DAP subchannels used with each CS and MCS.

CS/MCS



Number of DAP subchannels



CS1



0



CS2



1



CS3



1



CS4



1



MCS-1



0



MCS-2



1



MCS-3



1



MCS-4



1



MCS-5



1



MCS-6



2



MCS-7



3



MCS-8



4



MCS-9



4



Table 4



Number of 16 kbps DAP subchannels used with each CS and MCS



The PCU controls the downlink and uplink slave allocation on a radio block basis. Any

20 ms period on Abis is controlled based on real traffic demand. Downlink and uplink

allocations are controlled separately. The slave allocation is informed to the BTS by inband signalling on the corresponding downlink master channel.

Multiple logical TRXs can share a DAP. Multiple DAPs can be configured for each BTS

and for each physical Abis link.

O&M signalling, TRX signalling, and circuit-switched channels are used with Dynamic

Abis in the same way as they are used with the Nokia conventional Abis solution.



DN70124104



Id:0900d8058093ddcd

Confidential



163



Flexi EDGE BTS Feature Descriptions



8.11



BSS21438 Packet Abis over Satellite

The feature BSS21438 “Packet Abis over Satellite” enables the possibility for Packet

Abis to be used across satellite links (either TDM or Ethernet based). Packet Abis over

Satellite is robust to the impairments introduced by traditional satellite links. A BCF is

interpreted to be Packet Abis over Satellite configured if its OMUSIG Dchannel RTO.init

parameter value is 800ms or higher. This feature "BSS21438 Packet Abis over satellite”

is controlled by a TRX capacity based license key.

Packet Abis is a fully integrated solution, and provides the Abis optimization function.

This reduces the bandwidth requirements, and investment in additional external Abis

optimization equipment, resulting in significant capital and operational expenditure

savings.

Requirements











164



BSC S15

Flexi EDGE BTS EX4.0

NetAct OSS 5.2 CD Set 3

BSC (BSC3i 1000 (one cabinet): 2+2 ETP Modules, BSC3i 2000 (two cabinets): 6+6

ETP Modules, Flexi BSC: 6 + 6 ETP Modules, ETP interface modules required, with

the ETP Module, the LAN switch extension for BSC3i 1000/2000 and Flexi BSC with

the latest LAN switch version (ESB24-D) is necessary)



Id:0900d8058093ddce

Confidential



DN70124104



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8 BSS21440 Packet Abis over TDM

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