Overhead information transmission method, base station, terminal and system

Abstract

Disclosed is an overhead information transmission method. The method comprises: sending, by a base station, downlink control information (DCI) to a terminal through a downlink control channel, X bits in the DCI being used for indicating M sets of downlink reference information about other terminals except the terminal, where X is a positive integer, and M is a positive integer which is less than a numerical value expressed by a downlink data processing capability parameter of the terminal. Also disclosed at the same time are a base station, a terminal and a system corresponding to the method.

Description

technical field [0001] The present invention relates to data demodulation technology in the communication field, in particular to an overhead information transmission method, a base station, a terminal and a system. Background technique [0002] Long Term Evolution (LTE) technology is a wireless cellular communication technology of the fourth generation mobile communication technology (Fourth Generation, 4G). As mobile communication cells become more and more dense in the future, interference between users is a more important issue. At present, a variety of advanced receiving algorithms have been proposed. These advanced receiving algorithms can suppress certain interference and improve the demodulation performance of the receiving end. However, the advanced receiving algorithm with better interference suppression capability needs to obtain related information of other interference signals, such as pilot information, Modulation and Coding Scheme (MCS) information, and the l...

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Problems solved by technology

[0003] The terminal usually adopts the following two methods to obtain the information of other users' interference signals: one method is that the terminal estimates the information of the interference signal through a blind detection algorithm. This method is relatively complicated, and the estimated interference signal information has certain The other method is that the base station sends information about the interference signal to the terminal. The complexity of this method is relatively low, and the accuracy of the interference signal information obtained by the terminal is relatively high, but the disadvantage is: the base station sends the information of the interference signal The corresponding information will increase the downlink overhead information, especially when there are many interference signals, the downlink overhead information will also be more, reducing the downlink overhead information is also one of the key tasks of wireless communication system optimization

[0004] In the LTE system, the downlink overhead information is mainly sent in the downlink control channel. In order to reduce the downlink overhead information, if a higher MCS modulation is used, the performance of the terminal to demodulate the downlink control channel will be reduced.

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