Method and base station for multi-user multiple-input multiple-output communication

Abstract

Disclosed are an MU-MIMO communication method and a base station. The method comprises: determining that the total number n of layers where a first UE and a second UE are paired is greater than or equal to 3, wherein the number of layers where the first UE participates in the pairing is n1, the number of layers where the second UE participates in the pairing is n2, n=n1+n2, and the number of transmission layers supported by the first UE is greater than or equal to 4; determining pilot configuration of the first UE by using n as the number of transmission layers of the first UE; sending the pilot configuration of the first UE to the first UE; and allocating power to the first UE on the last n1 ports among antenna ports in the pilot configuration of the first UE, and allocating no power to the first UE on other ports. The MU-MIMO communication method and the base station according to the embodiments of the present invention can achieve that all DRSs of paired users are orthogonal, thereby enhancing the network performance.

Description

technical field [0001] The present invention relates to the field of communication, and more specifically, to a method and a base station for multi-user multiple input multiple output (Multi-User Multiple Input Multiple Output, referred to as "MU-MIMO") communication. Background technique [0002] MU-MIMO is a method that utilizes the spatial freedom of multi-user channels to multiplex multiple downlink user data into the same time-frequency domain resources to obtain Spatial Division Multiple Access (SDMA for short) gain. . For downlink MU-MIMO, since it is difficult for each user to achieve joint detection, appropriate precoding technology can be introduced on the side of the evolved base station (Evolutional Node B, referred to as "ENB or eNodeB") to suppress the interference between users. Realize user's SDMA multiplexing. [0003] In order to improve the actual network capacity, the 3rd Generation Partnership Project (referred to as "3GPP") association is developing t...

AI Technical Summary

Problems solved by technology

According to the number of layers and antenna port indication specified in Table 1 and the signaling content restrictions of DCI Format 2C, for 4R (rank is 4, that is, the number of transmission layers is 4, 2R and 8R and so on) and 2R UEs, When performing MU-MIMO pairing according to the standard protocol process, if the 3 / 4 layer pairing is performed, DRSPort can only use antenna ports 7, 8 and 2 different scrambling codes to combine 3 / 4 layer multiplexing, and through antenna port 7 , 8 and different scrambling codes, 3 / 4 layer MU pairing, the 2 UE DRS pilots are not strictly orthogonal, thus affecting network performance

Images