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Group 896 GPRS Radio Resource Management Model

Explore the definition, assumptions, and parameters of the GPRS session model designed for GSM voice and GPRS data traffic generation. Learn about session assignments, traffic load calculations, and mapping details in the simulation.

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Group 896 GPRS Radio Resource Management Model

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  1. Session3 Session1 Session2 Session3 Time[ h] Packet Call1 Packet Call 2 Packet Call 3 Time[ m] Packet 1 Packet 2 Packet 3 Time[ s] Traffic Model The definition of a GPRS session in our model: Group 896 GPRS Radio Resource Management

  2. Traffics: Mixture of GSM Voice calls and GPRS Data sessions Each session/call was randomly assigned to a Mobile Station(MS), where each MS only represent a propagation condition(C/I) corresponding to a certain distance from the BTS. Group 896 GPRS Radio Resource Management

  3. Traffic Generation Method Group 896 GPRS Radio Resource Management

  4. Model Assumptions • 1 session assigned to 1MS corresponding to a certain radio condition • 1MS can have multiple sessions based on radio condition • All the sessions are in the BSS to be transmitted • No Handover • Based on one Cell Configuration • No uplink simulation • Higher layers(TCP/IP, LLC) is not considered • ARQ for uplink is not considered Group 896 GPRS Radio Resource Management

  5. Parameters List Traffic Load = 5 ~ 29 Erlang GSM Voice: Traffic_Load*70% GPRS Data: Traffic_Load*30% Group 896 GPRS Radio Resource Management

  6. arrival time GPRS SESSION Session size (bits) time CS-x Mapping to block RLC blocks time Mapping GPRS session to RLC blocks Because in simulation the transmission was working on RLC block level. Group 896 GPRS Radio Resource Management

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