Significance of retransmission used in subsequent decoding
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H04L-001/18
G06F-011/10
출원번호
US-0072613
(2013-11-05)
등록번호
US-9225477
(2015-12-29)
발명자
/ 주소
Lee, Jungwon
Choi, Jiwoong
출원인 / 주소
Marvell International Ltd.
인용정보
피인용 횟수 :
0인용 특허 :
2
초록▼
Systems and techniques relating to wireless communications are described. A described technique includes receiving, at a wireless communication device, signals representing wireless data transmissions that are based on a message, the received signals including one or more previous signals and a curr
Systems and techniques relating to wireless communications are described. A described technique includes receiving, at a wireless communication device, signals representing wireless data transmissions that are based on a message, the received signals including one or more previous signals and a current signal, wherein the current signal was transmitted in response to the one or more previous signals failing to successfully resolve the message; combining the received signals based on unequal weights to produce a combined signal, the weights include a first weight value assigned to the one or more previous signals and a second, greater weight value assigned to the current signal, the second weight value being based on a noise variance, the first weight value being based on a modified version of the noise variance, the modified version reflecting one or more decoding failures; and decoding the combined signal to resolve the message.
대표청구항▼
1. A method comprising: receiving, at a wireless communication device, signals representing wireless data transmissions that are based on a message, the received signals including one or more previous signals and a current signal, wherein decoding of the message based on the one or more previous sig
1. A method comprising: receiving, at a wireless communication device, signals representing wireless data transmissions that are based on a message, the received signals including one or more previous signals and a current signal, wherein decoding of the message based on the one or more previous signals failed to successfully resolve the message, and wherein the current signal was transmitted in response to the one or more previous signals failing to successfully resolve the message;combining the received signals based on unequal weights to produce a combined signal, the weights include a first weight value assigned to the one or more previous signals and a second, greater weight value assigned to the current signal, the second weight value being based on a noise variance, the first weight value being based on a modified version of the noise variance, the modified version reflecting one or more decoding failures; anddecoding the combined signal to resolve the message. 2. The method of claim 1, wherein combining the received signals comprises: applying the first weight value to an accumulated metric, which is based on the one or more previous signals, to produce a weighted accumulated metric;applying the second weight value to the current signal to produce a weighted current signal; andcombining the weighted current signal and the weighted accumulated metric to produce the combined signal. 3. The method of claim 2, comprising: performing error detection on the decoded combined signal; andupdating the accumulated metric to include a contribution from the current signal based on the error detection indicating that the decoded combined signal failed to successfully resolve the message. 4. The method of claim 3, comprising: transmitting a negative acknowledgement to trigger a retransmission of the message. 5. The method of claim 1, comprising: determining the first weight value based on the second weight value and a code word minimum distance parameter. 6. The method of claim 1, wherein at least a portion of the wireless data transmissions are based on different incremental redundancy versions of the message. 7. An apparatus comprising: a memory configured to store information indicative of received signals representing wireless data transmissions that are based on a message, the received signals including one or more previous signals and a current signal, wherein decoding of the message based on the one or more previous signals failed to successfully resolve the message, and wherein the current signal was transmitted in response to the one or more previous signals failing to successfully resolve the message; andcircuitry configured to combine the received signals based on unequal weights to produce a combined signal, and decode the combined signal to resolve the message,wherein the weights include a first weight value assigned to the one or more previous signals and a second, greater weight value assigned to the current signal, the second weight value being based on a noise variance, the first weight value being based on a modified version of the noise variance, the modified version reflecting one or more decoding failures. 8. The apparatus of claim 7, wherein the circuitry is configured to apply the first weight value to an accumulated metric, which is based on the one or more previous signals, to produce a weighted accumulated metric, apply the second weight value to the current signal to produce a weighted current signal, and combine the weighted current signal and the weighted accumulated metric to produce the combined signal. 9. The apparatus of claim 8, wherein the memory is configured to store the accumulated metric. 10. The apparatus of claim 8, wherein the circuitry is configured to perform error detection on the decoded combined signal, and update the accumulated metric to include a contribution from the current signal based on the error detection indicating that the decoded combined signal failed to successfully resolve the message. 11. The apparatus of claim 10, wherein the circuitry is configured to cause a transmission of a negative acknowledgement to trigger a retransmission of the message. 12. The apparatus of claim 10, wherein the error detection comprises checking the decoded combined signal with associated cyclic redundancy check (CRC) bits. 13. The apparatus of claim 7, wherein the circuitry is configured to determine the first weight value based on the second weight value and a code word minimum distance parameter. 14. The apparatus of claim 7, wherein at least a portion of the wireless data transmissions are based on different incremental redundancy versions of the message. 15. An apparatus comprising: a memory configured to store information comprising an accumulated metric that includes contributions from one or more previously received signals representing one or more wireless data transmissions of a message, wherein decoding of the message based on the one or more previously received signals failed to successfully resolve the message;circuitry configured to receive information indicative of a currently received signal representing another wireless data transmission of the message, wherein the currently current received signal was transmitted in response to the one or more previously received signals failing to successfully resolve the message; andprocessor electronics configured to produce a combined signal based on the currently received signal and the accumulated metric by placing more significance to the currently received signal than the accumulation metric, decode the combined signal to produce a decoded combined signal, perform error detection on the decoded combined signal, and update the accumulated metric based on a contribution from the currently received signal if the error detection indicates a decoding failure. 16. The apparatus of claim 15, wherein the processor electronics are configured to apply a first weight value to an accumulated metric to produce a weighted accumulated metric, and apply a second weight value to the currently received signal to produce a weighted current signal, wherein the combined signal is based on the weighted current signal and the weighted accumulated metric, and wherein the second weight value is greater than the first weight value. 17. The apparatus of claim 16, wherein the second weight value is based on a noise variance, and wherein the first weight value is based on a modified version of the noise variance, the modified version reflecting one or more decoding failures. 18. The apparatus of claim 16, wherein the first weight value is based on the second weight value and a code word minimum distance parameter. 19. The apparatus of claim 15, wherein the error detection comprises checking the decoded combined signal with associated cyclic redundancy check (CRC) bits. 20. The apparatus of claim 15, wherein the processor electronics are configured to cause a transmission of a negative acknowledgement to trigger a retransmission of the message. 21. The apparatus of claim 20, wherein the retransmission is associated with a hybrid automatic repeat request (HARQ). 22. The apparatus of claim 15, wherein at least a portion of the wireless data transmissions are based on different incremental redundancy versions of the message.
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이 특허에 인용된 특허 (2)
Pauls Richard Joseph, Automatic retransmission query (ARQ) with inner code for generating multiple provisional decodings of a data packet.
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