发明名称 |
ADAPTIVE RANDOM ACCESS CHANNEL RETRANSMISSION |
摘要 |
A mobile wireless device adapts transmit power levels and number of retransmissions of a preamble sent to a wireless network. The mobile wireless device measures characteristics of a downlink signal received from the wireless network. The mobile wireless device transmits a series of preambles to the wireless network, each successive preamble having an increased power level, starting at a power level based on the measured received signal characteristics and on parameters received from the wireless network, up to a maximum transmit power level. When the transmit power level of the preamble exceeds the maximum transmit power level and when the measured downlink signal quality falls below a threshold, the mobile wireless device limits the number of preamble retransmission to less than an allowed maximum number of retransmissions. A minimum number of retransmissions is determined and adapted to higher values for larger measured values of downlink signal quality. |
申请公布号 |
EP2740314(A2) |
申请公布日期 |
2014.06.11 |
申请号 |
EP20120766191 |
申请日期 |
2012.08.03 |
申请人 |
APPLE INC. |
发明人 |
SONG, KEE-BONG;WANG, XIAOWEN;MUJTABA, SYED, AON |
分类号 |
H04W74/08;H04B17/318;H04W52/14;H04W52/24;H04W52/36;H04W52/48;H04W52/50 |
主分类号 |
H04W74/08 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|