Method and system for pre-treating downlink transmission in cooperative communication

Abstract

The invention discloses a method and a system for pre-treating downlink transmission in cooperative communication; wherein, the method comprises the following steps: the master nodes confirm whether the combined treatment procedure among the cooperative nodes or the coordinated scheduling procedure in the master nodes is adopted; in the combined treatment procedure among the cooperative nodes, each cooperative node acquires the pre-coded array among the nodes, and pre-codes a plurality of downlink data streams, which are sent from each cooperative node to user equipment, among the nodes by using the pre-coded array among the nodes; in the coordinated scheduling procedure in the master nodes, the master node acquires the pre-coded array in the nodes, and pre-codes a plurality of downlink data streams, which are sent from the master nodes to user equipment, in the nodes by using the pre-coded array in the nodes. The invention can eliminate the correlation of MIMO (Multiple Input Multiple Output) channels by acquiring the pre-coded array, so that the downlink data streams can be adapted to the downlink channel conditions, and the performance gain of a downlink joint transmission useror a coordinated scheduling user can be improved.

Description

technical field [0001] The present invention relates to a wireless communication system, and more specifically, to a downlink transmission preprocessing method and system in cooperative communication. Background technique [0002] In the next generation mobile communication system, Cooperated Multipoint (Cooperated Multipoint, CoMP) transmission technology is considered to be an effective method to improve transmission performance of cell edge users. Specifically, the downlink CoMP transmission technology can be divided into two categories: (1) joint processing / transmission; (2) cooperative scheduling and / or beam forming (Beam Forming). [0003] In the application scenario of the existing coordinated multi-point transmission technology, the user constructs a coordinated cell cluster by selecting different serving node units, so as to perform joint processing between cells. The beamforming joint processing of multi-cooperative cells not only brings low lobe utilization, but ...

AI Technical Summary

Problems solved by technology

The beamforming joint processing of multi-cooperative cells not only brings low lobe utilization, but also causes greater interference from the additional same-frequency lobes. This solution requires high beamforming synchronization between cells, and Has a strong delay sensitivity

[0004] In the existing intra-cell downlink cooperative scheduling scheme, the beamforming-based cooperative scheduling method is likely to cause additional co-channel interference due to the multi-beam collision problem between cells, and the interfering user interference in the beamforming technology itself The co-channel interference of the side lobe to the main lobe pointing to the user makes the performance gain brought by the downlink joint processing based on the beamforming technology limited

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