Dynamic subcarrier associated limit bit feedback and dispatching method

Abstract

The invention relates to a limit bit feedback and multiuser dispatching algorithm which comprises the following steps of: at the base station side, determining a loaded wave beam set for each subcarrier; at the user equipment side, obtaining the wave beam set information, forming an associated subcarrier on the basis of each subcarrier, calculating a channel quality estimation parameter of each wave beam, and determining the optimal wave beam and a key subcarrier; and if the channel quality corresponding to the optimal wave beam on the key subcarrier exceeds a scheduled threshold value, feeding a sequence number of the key subcarrier and the best wave beam number back to the base station side; and at the base station side, receiving the feedback information of the user equipment, expanding the feedback information of the key subcarrier to the associated subcarrier, determining a reference wave beam set adopted by the associated subcarrier on the basis of each subcarrier, and than carrying out the user dispatching on each wave beam, and finally carrying out the data transmission according to the selecting condition of the reference wave beam set and a user dispatching result. The invention has the advantages of less user feedback information amount, high feedback efficiency, large frequency spectrum multiplexing coefficient and high flexibility, simple realization, less signaling interaction between a user and a base station, and the like.

Description

technical field [0001] The invention relates to a feedback and scheduling method in the field of communication technology, in particular to a limited bit feedback and multi-user scheduling method applied to a downlink random beamforming Orthogonal Frequency Division Multiplexing (OFDM) system. Background technique [0002] The proposal of random beamforming can allow users to feed back channel information to the base station with a relatively small amount of feedback for the base station to perform user scheduling. From the perspective of the system, this technology proposes the concept of multi-user diversity, thus realizing the advantages of low feedback and high system traffic. Random beamforming technology combined with limited bit feedback and multi-user scheduling can further reduce the amount of uplink feedback in the system and obtain relatively high total system traffic, which is suitable for use in OFDM systems. [0003] In some prior art documents, the following ...

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Problems solved by technology

[0010] The purpose of the present invention is to solve the problems in the prior art that the amount of uplink feedback information is large, the feedback efficiency is low, or the system traffic is small, and the spectrum utilization rate is low, and to provide a limited downlink random beamforming OFDM system. Bit Feedback and Multi-User Scheduling Method

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