Invention Grant
- Patent Title: Adaptation of cyclic shift for random access preambles
- Patent Title (中): 随机访问前导码的循环移位的适应
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Application No.: US13576113Application Date: 2010-02-03
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Publication No.: US08879412B2Publication Date: 2014-11-04
- Inventor: Olav Queseth , Robert Baldemair
- Applicant: Olav Queseth , Robert Baldemair
- Applicant Address: SE Stockholm
- Assignee: Telefonaktiebolaget L M Ericsson (publ)
- Current Assignee: Telefonaktiebolaget L M Ericsson (publ)
- Current Assignee Address: SE Stockholm
- Agency: Myers Bigel Sibley & Sajovec, PA
- International Application: PCT/SE2010/050129 WO 20100203
- International Announcement: WO2011/096858 WO 20110811
- Main IPC: H04L12/28
- IPC: H04L12/28 ; H04L12/56 ; H04W4/00
Abstract:
The present invention enables automatic configuration of random access parameters. The base station is configured to control PRACH transmission of UEs, wherein the UE PRACH transmission comprises transmission of PRACH preambles constructed of root sequences. This is achieved by storing statistics associated with previous transmissions. A parameter associated with the construction of the PRACH is tuned based on the stored statistics. The base station controls the UE PRACH transmission by transmitting information to the UEs relating to the tuned parameter. This information is used by the UE when constructing the PRACH preambles. In this way, the cell parameters relating to random access can be improved to fit better to individual cells resulting in improved resource usage.
Public/Granted literature
- US20120294185A1 ADAPTATION OF CYCLIC SHIFT FOR RANDOM ACCESS PREAMBLES Public/Granted day:2012-11-22
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