Group 896 Allocation of Radio Resources to packet-switched traffic in GPRS-like networks By group 896 Supervisors:Students: Hans Peter SchwefelXin Zhou Patrick Eggers Jimena Llorente Martinez Devendra Prasad François Delawarde Gwénaël Coget Haibo Wang

Group 896 Allocation of Radio Resources to packet-switched traffic in GPRS-like networks Project description: Analyze existing GPRS radio resource management strategies. Define scenarios and input parameters, for which an algorithm for the assignment of resources to packet-switch traffic will be developed. Evaluate/validate the algorithm in simplified simulation models.

Group 896 Allocation of Radio Resources to packet-switched traffic in GPRS-like networks Performance Evaluation Simulator validation Simulations parameters Simulations results Future work

Group 896 Allocation of Radio Resources to packet-switched traffic in GPRS-like networks Simulator Validation RRM strategies: use of output functions and breakpoints to check the behaviour of access queue, choice of TRX/TS, scheduler, reassignment, preemption… Propagation /Transmission: comparison between the curve used to map C/I, BLER and throughput and the one obtained Traffic Model: comparison between input parameters and traffic generated (number of sessions per hour, call length, session size…)

Group 896 Allocation of Radio Resources to packet-switched traffic in GPRS-like networks Simulations Parameters Parameter NameVALUE Simulated Duration4 hours Traffic Load (TL)from 5 to 29 "Erlangs" Number of simulations (per TL)15 TRXS4 (32 TSs) Number of signalling channels4 Number of traffic channels28 Maximum number of multiplexed sessions per TS 32 Number of Mobile Nodes30 Multi-slot capacity of Mobile4TSs Mean GSM call duration120s Mean GPRS session size100kB Access queue size7 sessions Maximum number of block retransmission 25

Group 896 Allocation of Radio Resources to packet-switched traffic in GPRS-like networks Simulations Results Throughput per Cell Vs. Traffic Load Throughput per Session Vs. Traffic Load Access Delay Vs. Traffic Load Blocking Rate GPRS Vs. Traffic Load Throughput per Session Vs. C/I

Group 896 Allocation of Radio Resources to packet-switched traffic in GPRS-like networks Throughput per Cell

Group 896 Allocation of Radio Resources to packet-switched traffic in GPRS-like networks Throughput per Session

Group 896 Allocation of Radio Resources to packet-switched traffic in GPRS-like networks Throughput Per Session Vs. C/I

Group 896 Allocation of Radio Resources to packet-switched traffic in GPRS-like networks Mean access delay

Group 896 Allocation of Radio Resources to packet-switched traffic in GPRS-like networks Blocking Rate GPRS

Group 896 Allocation of Radio Resources to packet-switched traffic in GPRS-like networks Future Work Consideration of QoS requirements (traffic model with different types of service) Consideration of Uplink Investigation of higher layers