Improving CS-4 User Data Rate in GPRS Enabled Devices by Using a BLER Co-processor
Tóm tắt
The General Packet Radio Service (GPRS) was developed to allow packet data to be transported efficiently over an existing circuit switched radio network. The main applications for GPRS are in transporting IP datagram’s from the user’s mobile Internet browser to and from the Internet, or in telemetry equipment. A simple Error Detection and Correction (EDC) scheme to improve the GPRS Block Error Rate (BLER) performance is presented, particularly for coding scheme 4 (CS-4), however gains in other coding schemes are seen. For every GPRS radio block that is corrected by the EDC scheme, the block does not need to be retransmitted releasing bandwidth in the channel, improving throughput and the user’s application data rate. As GPRS requires intensive processing in the baseband, a viable hardware solution for a GPRS BLER co-processor is discussed that has been currently implemented in a Field Programmable Gate Array (FPGA) and presented in this paper.
Tài liệu tham khảo
Bianchi G., Borgonovo F., Capone A., Musumeci L. (1994) Packet data service over GSM networks: proposal and performance evaluation attempt. IEEE 5th International Symposium on Personal, Indoor and Mobile Radio Communications 3: 929–933
ETSI, GSM 05.03 version 8.5.0 Release 1999, European Standard, EN 300 909 V8.5.0 (2000–2007).
N. J. Boucher, The Cellular Radio Handbook: A Reference for Cellular System Operation, Wiley 2001, ISBN 0-471-38725-8.
V. K. Garg and J. E. Wilkes, Principles and Applications of GSM, Prentice Hall, 1999, ISBN 0139491244.
Zhou D., Zukerman M. (1999) Performance and efficiency evaluation of channel allocation schemes for HSCSD in GSM. IEEE Global Telecommunications Conference 1B: 1084–1088
ETSI, GSM 05.02 version 8.5.0 Release 1999, European Standard, EN 300 908 V8.5.0 (2000–2007).
ETSI, GSM 05.05 version 8.5.0 Release 1999, European Standard, EN 300 910 V8.5.0 (2000–2007).
Sherratt R.S. (2003) Performance of GPRS Coding Scheme Detection under Severe Multipath and Co-Channel Interference as a Function of Soft-bit Width. IEEE Wireless Communications and Networking Conference 2: 801–805
R. S. Sherratt and X. Yao, Results of GPRS BLER as a function of coding scheme detection performance and signal dynamic range, IEEE International Symposium on Consumer Electronics, IEEE CD-ROM, Sydney Australia, December 3–5, 2003.
Xilinx, Spartan-IIE 1.8v FPGA family, complete data sheet, Document DS077-4, http://www.xilinx.com, February 14th, 2003