Method for selecting cooperative nodes in LTE-A system, base station and cooperative node

Abstract

The invention relates to a method for selecting cooperative nodes in an LTE-A system, a base station and cooperative nodes; the invention has the following the technical schemes: firstly, according to the channel gain of the base station and the user equipment, the channel gain of the base station and the cooperative nodes, the channel gain of the cooperative nodes and the user equipment, and the receiving signal-to-noise ratio of the cooperative nodes, determining a candidate cooperative node set; then, receiving a packet sent by the cooperative nodes of the first received candidate cooperative node set; finally, affirming the character ACK signal to the firstly received cooperative nodes of the packet, and selecting the corresponding cooperative nodes as the optimal cooperative nodes. Through the technical schemes in the embodiment of the invention, the emitting power of cooperative nodes is not increased while the cell-edge user obtains higher data rate, the energy consumption is few, and the average living time of the network cannot be influenced.

Description

Technical field [0001] The invention relates to a method for selecting a cooperative node in an LTE-A system, a base station and a cooperative node, and belongs to the technical field of network communication. Background technique [0002] The LTE-A (Long Term Evolution-Advance, Long Term Evolution) system uses orthogonal frequency division multiplexing (OFDM), that is, the high-rate data stream is divided into some low data streams and sent out through some orthogonal carriers. With the orthogonality between the cells, the intra-cell interference is effectively reduced, but the inter-cell interference cannot be reduced. COMP (Coordinated Multi-Point Transmission, Coordinated Multi-Point Transmission) is to use the principle of distributed antennas to reduce interference through the coordination of multiple base stations, thereby enhancing the spectral efficiency of data. COMP, as a key technology of LTE-A, can improve the system The average throughput and the performance of cel...

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Problems solved by technology

[0004] The present invention provides a method for selecting a cooperative node in an LTE-A system, a base station and a cooperative node, so as to solve the problem of improving the spectrum efficiency and throughput of the system while reducing the average network survival time in the prior art. For this purpose, the present invention Adopt the following technical solutions:

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