User equipment downlink transmitting power allocation method and device in multi-user-multiple?input?and?multiple?output (MUMIMO) system

Abstract

The invention discloses a user equipment downlink transmitting power allocation method in a multi-user-multiple?input?and?multiple?output (MUMIMO) system. The method comprises the following steps that: A, in a system initialization phase, a mapping table of the modulation and coding mode of each order and transmission efficiency is set, in the mapping table, the modulation and coding mode of each order is uniquely corresponding to one transmission efficiency value; B, the modulation and coding mode of each set of user equipment in a community is obtained according to scheduling information; C, as for any set of user equipment in the community, the mapping table is queried according to the modulation and coding mode of the user equipment so as to obtain a corresponding transmission efficiency value, and the downlink transmitting power of the user equipment can be calculated according to the transmission efficiency value, wherein the transmitting power of the user equipment is a monotone increasing function of the transmission efficiency value; and D, corresponding transmitting power is allocated to each set of user equipment according to the calculation results of the downlink transmitting power, such that downlink data transmission can be performed. The invention also discloses a user equipment downlink transmitting power allocation device in the multi-user-multiple?input?and?multiple?output (MUMIMO) system.

Description

technical field [0001] The present application relates to the field of mobile communication technology, in particular to multiple antenna technology (MIMO, Multiple Input and Multiple Output) technology, especially to a user equipment downlink transmission power allocation in a multi-user multi-antenna (MU-MIMO, Multi-User MIMO) system Methods and devices. Background technique [0002] With the continuous development of mobile communication systems, MIMO technology has become a necessary means to adapt to the growing high-speed data services. The MIMO technology increases the number of antennas at the transmitting end and the receiving end, and uses multiple parallel channels between the transmitting end and the receiving end to transmit data simultaneously, thereby improving the system spectrum utilization. [0003] If the same or redundant data streams are transmitted on multiple parallel channels, the reliability of the system can be improved; if different data streams a...

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Problems solved by technology

[0005] The power allocation in the existing downlink MU-MIMO system generally adopts the simplest equal power allocation, that is, the downlink transmit power of each UE is equal. This method is simple to implement and has low complexity, but there are certain limitations in performance: UEs with high-speed data transmission need higher downlink transmission power, but the equal power allocation principle often cannot meet the needs of these users, and the power of UEs that are in standby state or low-speed transmission at the same time will be wasted, resulting in system The overall performance of the

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