Title :
Performance evaluation of a single-slot packet data channel in GSM
Author_Institution :
Ericsson Radio Syst. AB, Stockholm, Sweden
Abstract :
Within ETSI SMG, a general packet radio service (GPRS) is being specified as part of GSM Phase 2+. GPRS may be based on a new type of logical radio channel optimized for packet data. Thus, the need has arisen to evaluate, through simulations, the performance of such a channel. The simulation model used is based upon a preliminary system description and an assumed radio link protocol. This paper presents an investigation of the performance of one (master) single-slot packet data channel. The emphasis is put on finding the optimum coding scheme which gives the best performance in terms of throughput, packet delay (mean value together with 95% confidence interval) and channel stability. Special attention is given to the points where the input load doubles the delay across the air-interface compared to the delay at low input load. The random access based packet reservation mechanism is also highlighted because optimization in the slotted random access strategies have a direct impact on the overall throughput of the data channel. Furthermore, the use of appropriate adaptive backoff policies can result in stable throughput-delay characteristics. The results are compared to the values stated in “Requirements of General Packet Radio Service (GPRS)” which is a working document in the standardization process
Keywords :
cellular radio; data communication; encoding; land mobile radio; packet radio networks; packet reservation multiple access; radio links; telecommunication channels; GSM; GSM Phase 2+; adaptive backoff policies; air-interface delay; channel stability; general packet radio service; input load; logical radio channel; mean value; optimum coding scheme; packet delay; performance evaluation; radio link protocol; random access packet reservation; simulation model; single-slot packet data channel; slotted random access; standardization; throughput; throughput-delay characteristics; Delay; GSM; Ground penetrating radar; Packet radio networks; Protocols; Radio link; Stability; Standardization; Telecommunication standards; Throughput;
Conference_Titel :
Vehicular Technology Conference, 1995 IEEE 45th
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-2742-X
DOI :
10.1109/VETEC.1995.504927