发明名称 |
Performing a power boost in a wireless communication system |
摘要 |
A method and system are provided for boosting power for a communications link between a base station and a user device, or user equipment, in a cellular communications network. In one embodiment, the communications link is a downlink between the base station and the user device established via a downlink channel having a full channel bandwidth including a number of sub-carrier frequencies. The base station determines whether a power boost is needed for a downlink to the user device. If so, the base station uses a subset of the sub-carrier frequencies from the full channel bandwidth as a reduced bandwidth channel, or sub-channel, for the downlink to the user device such that signal power is concentrated on the sub-carrier frequencies of the reduced channel bandwidth rather than spread across the sub-carrier frequencies of the full channel bandwidth. As a result, a power boost for the downlink is provided. |
申请公布号 |
US8831670(B2) |
申请公布日期 |
2014.09.09 |
申请号 |
US201213620671 |
申请日期 |
2012.09.14 |
申请人 |
BlackBerry Limited |
发明人 |
Chang Chu-Rui;Fluet Jacques |
分类号 |
H04B7/00;H04B1/38;H04W52/34;H04W52/24;H04W52/42 |
主分类号 |
H04B7/00 |
代理机构 |
Fish & Richardson P.C. |
代理人 |
Fish & Richardson P.C. |
主权项 |
1. A user device in a cellular communications network, comprising:
a transceiver providing a communications link between the user device and a base station, the user device located within a cell of the cellular communications network served by the base station via a communications link channel having a full channel bandwidth including a plurality of sub-carrier frequencies; and a processor associated with the transceiver and adapted to:
transmit a wideband channel quality index to the base station;transmit a plurality of sub-band channel quality indices to the base station;in response to a determination that a power boost is needed for a communications link between the base station and the user device, use a subset of the plurality of sub-carrier frequencies of the communications link channel as a reduced bandwidth channel for the communications link between the user device and the base station such that signal power is concentrated on the subset of the plurality of sub-carrier frequencies in the reduced bandwidth channel rather than distributed across the full channel bandwidth, thereby providing a power boost for the communications link to the user device;wherein the determination that a power boost is needed for the communications link between the base station and the user device is based on the wideband channel quality index;wherein the subset of the plurality of sub-carrier frequencies are determined based at least in part on the plurality of sub-band channel quality indices; andreceive an indication of the subset of the plurality of sub-carrier frequencies of the communications link channel from the base station, the indication of the subset of the plurality of sub-carrier frequencies comprising an indication of a number of resource blocks, each resource block containing twelve sub-carrier frequencies, wherein the subset of the plurality of sub-carrier frequencies of the communications link channel is coordinated with at least one other base station, wherein the other base station uses a different subset of the plurality of sub-carrier frequencies. |
地址 |
Waterloo, Ontario CA |