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GPRS : General Packet Radio System - page 5 / 20

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Networks: L17

5

SNDCP : Subnetwork Dependent Convergence Protocol – maps network-level characteristics onto the characteristics of the underlying network

LLC : Logical Link Control – provides a reliable ciphered logical link

Relay :  relays PDUs between the Um/Gb and Gb/Gn interfaces

BSSGP : Base Station System GPRS Protocol – conveys routing and QoS information between BSS and SGSN

Network Service (NS) : transports BSSGP PDUs -  based on Frame Relay (a high-performance WAN protocol originally developed for ISDN)

»

may traverse a multi-hop network of Frame Relay switching nodes

RLC : Radio Link Control provides a radio-technique-dependent reliable link

MAC : Medium Access Control controls access signalling (request and grant) procedures for the radio channel

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