Adaptive hybrid retransmission method for wireless communications
US7564827B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 19, 2001 |
| Grant date | Jul 21, 2009 |
| Priority date | — |
| Expiry date | May 6, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/1858
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An adaptive incremental redundancy (i.e., Hybrid ARQ) method is described for retransmitting information in a communication channel of a wireless communication system. More specifically, code multiplexing is used within fixed length frames in order to change the number of codes, modulation, and coding on retransmissions to provide the desired redundancy for successful decoding. The operation of adaptive Hybrid ARQ in the code domain also provides finer granularity in which to efficiently transmitting redundancy. In one illustrative embodiment, a method for retransmitting information in a communication channel having a plurality of fixed length frames each divided into a plurality of time slots of equal duration includes the step of code multiplexing a retransmission of a previous transmission within one of the fixed length frames using one or more of a plurality of codes. The number of codes used for the retransmission is variable based on the condition of the communication channel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.