Error detection/correction and fault detection/recovery – Pulse or data error handling – Digital data error correction
Reexamination Certificate
2006-10-11
2010-10-26
Rizk, Sam (Department: 2112)
Error detection/correction and fault detection/recovery
Pulse or data error handling
Digital data error correction
C714S748000
Reexamination Certificate
active
07823040
ABSTRACT:
A method and apparatus for identifying optimal redundancy version (RV) sequences for HSDPA transmissions based on extensive search. In a first embodiment of the present invention, in HSDPA QPSK mode, the transmitter retransmits according to the RV sequence [0 7 3 4 1 6 5 2] and in HSDPA 16QAM mode, the transmitter retransmits according to the RV sequence [0 1 3 4 5 6 7 1]. In a second embodiment of the present invention, in HSDPA QPSK mode, the transmitter retransmits according to the RV sequence [0 7 3 4 1 6 5 2] if the initial coding rate is greater than or equal to 0.5 and [0 4 3 6 2 1 6 2] if the initial coding rate is less than 0.5. In HSDPA 16QAM mode, the transmitter retransmits according to the RV sequence [0 1 3 4 5 6 7 1] if the initial coding rate is greater than or equal to 0.5 and the transmitter retransmits according to the RV sequence [0 4 5 6 0 4 5 6] if the initial coding rate is less than 0.5. In a third embodiment of the present invention, the transmitter retransmits according to the RV sequence according to each specific initial coding rate. In a fourth embodiment of the present invention, the transmitter retransmits according to the RV sequence according to a specific initial coding rate and a specific mother code rate. An SNR tracking algorithm is provided in conjunction with the optimal sequences for robust HARQ operations.
REFERENCES:
patent: 7237170 (2007-06-01), Ratasuk et al.
patent: 2003/0076783 (2003-04-01), Das et al.
patent: 2003/0133497 (2003-07-01), Kinjo et al.
patent: 2003/0135811 (2003-07-01), Xu et al.
patent: 2005/0022097 (2005-01-01), Cheng
patent: 2006/0075319 (2006-04-01), Ratasuk et al.
patent: 2006/0150051 (2006-07-01), Kwon et al.
patent: 1641170 (2006-03-01), None
patent: 1655879 (2006-05-01), None
Cheng, Jung-Fu, “Coding performance of hybrid ARQ schemes,” IEEE Transactions on Communications. Jun. 2006.
3GPP TS 25.212 V6.6.0 (Sep. 2005); 3rdGeneration Partnership Project; Technical Specification Group Radio Access Network; Multiplexing and channel coding (FDD) (Release 6).
Cheng, Jung-Fu, “Coding Performance of Hybrid ARQ with Bit Interleaved Coded Modulation,” Proceedings of IEEE International Symposium of Information Theory, Jun. 2004.
Cheng, Jung-Fu, “On the Coding Gain of Incremental Redundancy over Chase Combining,” Proceeding of IEEE Global Telecommunications Conference, Dec. 2003.
Rizk Sam
Telefonaktiebolaget L M Ericsson (Publ)
LandOfFree
Method and apparatus for optimal redundancy version (RV)... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for optimal redundancy version (RV)..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for optimal redundancy version (RV)... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4155490