US2005050432A1

3G,2G

Title

Method and apparatus for time efficient retransmission using symbol accumulation

Application Number:

US20040946960

Publication Date:

03-03-2005

Current Assignee:

CHEN TAO , ODENWALDER JOSEPH P , TIEDEMANN JR EDWARD G , WILL SERGE EGGER

Family ID:

25515421

Application Date:

21-09-2004

Publication Country:

US

View on Espacenet

Priority Date:

13-11-1997

Declaring Company:

QUALCOMM INC

Abstract  Abstract

An efficient retransmission of data using symbol accumulation wherein the packet received in error is retransmitted at a lower energy-per-bit level concurrently in the same frame with the new packet. The destination device receives the data transmission and retransmission, demodulate the signal, and separates the received data into the new and retransmitted packet. The destination device then accumulates the energy of the retransmitted packet with the energy already accumulated for the packet received in error and decodes the accumulated packet. The accumulation of the additional energy provided by the subsequent retransmissions improves the probability of a correct decoding. The throughput rate can be improved since the packet received in error is retransmitted concurrently with the transmission of the new data packet. The capacity is maximized since the retransmission of the packet received in error is at a lower energy level than that of the new packet.

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