Contention-free random access procedure in wireless networks
US9301323B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 16, 2011 |
| Grant date | Mar 29, 2016 |
| Priority date | — |
| Expiry date | Nov 21, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W74/0858
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In order to provide a more robust contention-free random access procedure for use in a cellular wireless network and specifically, a contention-free random access procedure that is able to recover more quickly in case of failure a method for a radio access node (10) that is arranged in a wireless network and communications with user equipment, UE (20) and a radio access node are proposed. The method includes: receiving a first random access message (40) from a UE, the first message containing a pre-assigned contention-free random access preamble and representing a start of a random access procedure; responding to the received first message by sending a second message (50) to the UE, the second message containing time alignment information to enable a scheduled transmission of a third message (60) by the UE; ascertaining that no third message is received from the UE within a predetermined period of time and transmitting a command (80) to the UE ordering a restart of the random access procedure with the same pre-assigned contention-free random access preamble.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.