Applying LDPC Codes to the GPRS
نویسندگان
چکیده
The existing General Packet Radio Service (GPRS) currently uses the well-known convolutional code as a Forward Error Correction (FEC) mechanism, and the Viterbi algorithm for decoding. With the recent introduction of Multimedia Broadcast Multicast Services (MBMS), new applications that require more bandwidth and reliability are foreseen. It is known that the current GPRS system does not perform well enough without further modifications, therefore, more efficient information distribution schemes must be considered. To meet these increased requirements, especially for MBMS, we study the introduction of carefully designed LDPC codes at the physical layer. To allow the full benefit of the superior performance of LDPC codes for longer streams in MBMS, a modification in the GPRS protocol stack is proposed, where larger RLC/MAC blocks are allowed, and the impact of this adjustment on the traditional GPRS protocol stack is minimized.
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تاریخ انتشار 2005