Terminal in wireless communication system and ranging method for dynamically changing ranging period thereof
US8027368B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 7, 2005 |
| Grant date | Sep 27, 2011 |
| Priority date | — |
| Expiry date | Dec 28, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W56/00
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A ranging method of an access terminal that requests a ranging to an access point through a wireless network and performs the ranging, the ranging method including a) initializing a ranging period, b) setting a timer with the ranging period and starting the timer, c) requesting a ranging by transmitting a given ranging code to the access point based on radio resource allocation information provided by the access point, d) receiving a ranging response message from the access point, and controlling transmission power, timing, and frequency offset of an access terminal according to transmission parameters included in the received ranging response message, e) estimating a downlink channel condition through which a signal from the access point is transmitted, f) resetting the ranging period according to the estimated downlink channel condition, and g) iteratively performing b) to f) according to the reset ranging period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.