Reference Manual

GPRS, Physical Link Layer
27 GPRS, Physical Link Layer
General Packet Radio Services (GPRS) is a packet switched service.
The service provides:
• Efficient use of scarce radio resources
• Fast set-up/access time
•
Efficient transport of packets in the GSM network
27.1 References
/GSM:04.04/
/GSM:04.60/
/GSM:05.02/
/GSM:05.03/
/GSM:05.10/
/GSM:05.08/
Whenever a reference is made to a function described in another chapter,
please refer to the table of contents to find the appropriate chapter.
27.2 Concepts
PCU Frame A PCU Frame is transported on Abis
interface and contains an RLC/MAC
Block and control information.
Radio Block A Radio Block is transported on air
interface and contains an RLC/MAC
Block and a BCS.
RLC/MAC Block An RLC/MAC Block contains a MAC
Header and an RLC Data or an RLC/
MAC Control Block as defined in /
GSM:04.60:10/.
27.3 Functions
27.3.1 Radio Block Transmission
Purpose
Radio Block Transmission specifies the functionality for downlink
transport of RLC/MAC Block.
Preconditions and Initiation
The function is initiated by a PCU frame of type PCU-DATA-IND,
received on Abis GSL interface.
EN/LZT 720 0008 P2A
2001-11-28
275 (485)
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