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Traffic Model PowerPoint Presentation
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Traffic Model

Traffic Model

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Traffic 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