Synchronization method and apparatus for a wireless packet network
US5517505A · kind A · utility
71Cited by
28References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 13, 1993 |
| Grant date | May 14, 1996 |
| Priority date | — |
| Expiry date | Dec 13, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D30/70
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a wireless TDMA network a control module (CM) sends a time stamp relative to the beginning of its frame in a synchronization packet allowing each of a plurality of user modules (UM) to maintain synchronization relative to the CM. The CM uses a plurality of directional antennas and transmits the synchronization packets over each antenna over a predetermined number of frames. The UMs use a receive time stamp to identify the beginning of a received synchronization packet. The difference between the time stamps combined with a delay constant is used by the UMs to adjust time synchronization to the CM frame.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.