Wireless device and random access method thereof for mobile communication system
US9730237B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 2, 2016 |
| Grant date | Aug 8, 2017 |
| Priority date | — |
| Expiry date | Dec 2, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W88/02
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A wireless device and a random access method thereof for a mobile communication system are provided. The mobile communication system defines a plurality of preambles. The wireless device receives a system message carrying a random access success rate from a base station, and divides the preambles into N preamble subsets according to the random access success rate. The N preamble subsets have a strict partial order relationship therebetween. The union of the N preamble subsets consists of the preambles. When requesting random access from the base station, the wireless device randomly selects a preamble from the smallest preamble subset. When a preamble collision occurs, the wireless device reselects a preamble from the larger preamble subset gradually for the random access.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.