Method, device and system for feeding back channel information
A technology of channel information feedback and channel information, which is applied in the field of mobile communication, can solve problems such as waste of overhead, and achieve the effect of saving feedback overhead
Active Publication Date: 2010-10-27
DATANG MOBILE COMM EQUIP CO LTD
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[0009] Since the channel information to be fed back needs to be encoded to 20 bits, and one uplink subframe position only transmits one type of reported channel information, when feeding back channel information with less overhead (for example, 2 bits of RI information or 4 bits of CQI information), will result in a certain amount of wasted overhead
In addition, in a multi-carrier system using carrier aggregation technology, multiple aggregated carriers use different transmission modes, and different transmission modes correspond to different channel information feedback modes. In the prior art, there is no suitable channel information feedback mode to support multiple aggregated carriers with different transmission modes
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[0079] The embodiment of the present invention is applied to a multi-carrier system including a base station and a user equipment, wherein the user equipment combines channel information of at least two downlink carriers at the same uplink subframe position to generate a multi-carrier channel by means of direct combining or differential cascading information, and perform baseband processing on the multi-carrier channel information, and send the baseband-processed multi-carrier channel information to the base station.
[0080] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative e...
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The invention discloses a method, a device and a system for feeding back channel information, which are applied to a system comprising a base station and user equipment. The method comprises the following steps that: the user equipment combines channel information of at least two downlink carriers which are transmitted at the same uplink subframe position to generate multi-carrier channel information; the user equipment performs baseband processing on the multi-carrier channel information; and the user equipment sends the multi-carrier channel information after the baseband processing to the base station through an uplink channel. The method, device and system effectively save the feedback expense of the channel information.
Description
technical field [0001] The present invention relates to the technical field of mobile communication, in particular to a channel information feedback method, device and system. Background technique [0002] With the development of communication technology, the capacity of mobile services is increasing exponentially, and high-speed services are required to meet the continuously increasing user demands, while high-speed services and applications require higher peak rates and cell throughput. In order to increase the peak rate and the average throughput of the cell, the communication system needs to support a larger system bandwidth. [0003] Due to the limitation of spectrum resources, when a multi-carrier system allocates spectrum resources, multiple carriers can be continuously or discontinuously distributed on spectrum resources through carrier aggregation technology to meet greater bandwidth requirements. At present, the multi-carrier system initially defines a system band...
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IPC IPC(8): H04L1/16H04L1/00H04L25/03H04W88/02H04W88/08
Inventor 喻晓冬林亚男肖国军赵亚利
Owner DATANG MOBILE COMM EQUIP CO LTD