Efficient time division duplex communication system with interleaved format and timing adjustment control
US5802046A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 5, 1995 |
| Grant date | Sep 1, 1998 |
| Priority date | — |
| Expiry date | Jun 5, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W88/08
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A system for efficient time division duplex communication between a base station and a plurality of user stations over a single frequency band whereby guard time overhead is reduced through use of an interleaved frame structure and active adjustment of reverse link transmission timing as a function of round trip propagation time. A time frame is divided into a plurality of time slots. The base station transmits a forward link message to a first user station in a first time slot. The user station responds with a reverse link message in the following time slot. In the meantime, the base station receives a reverse link message from a second user station in the first time slot, and sends out another forward link message to a third base station in the first portion of the first time slot. The delay between transmitting the forward and reverse link messages to a particular user station allows for round trip propagation of the forward and reverse link messages. The interleaved frame structure provides for forward and reverse link messages to other user stations while the base station is waiting for a response from the user station, thereby maximizing time efficiency. The base station may,…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.