Wireless access modem having downstream channel resynchronization method
US7120854B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 18, 2003 |
| Grant date | Oct 10, 2006 |
| Priority date | — |
| Expiry date | May 5, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W74/00
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A resynchronization method for use in a data communication system having a first device configured to transmit data at a symbol rate to a second device. The second device includes a Reed Solomon (RS) decoder having a RS lock indicator and a Moving Picture Experts Group (MPEG) Protocol Interface (MPI) having a MPI lock indicator, wherein the RS and the MPI lock indicators are monitored. Four different states, defined by the values of the RS and MPI lock indicators, determine whether the data communication system will wait for the RS decoder and the MPI hardware block to resynchronize, whether an intermediate-subset of the channel acquisition algorithm is performed or whether the entire channel acquisition algorithm is performed. The method for resynchronization described herein recovers synchronization within a predetermined time without the layers above the physical link layer having knowledge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.