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Joint user grouping and power distribution method and base station using same

A technology of user grouping and allocation method, applied in power management, broadcast service allocation, wireless communication, etc., can solve the problem of no proposed user grouping algorithm, and achieve the effect of reducing complexity, improving transmission efficiency, and improving system capacity

Active Publication Date: 2018-08-21
王晋良
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are techniques to divide user devices into multiple groups to mitigate multi-user interference, there is still no relevant user grouping algorithm for user devices in a cooperative NOMA system

Method used

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  • Joint user grouping and power distribution method and base station using same
  • Joint user grouping and power distribution method and base station using same
  • Joint user grouping and power distribution method and base station using same

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Embodiment Construction

[0032] figure 1 It is a schematic diagram of a downlink cooperative NOMA system drawn according to an embodiment of the present invention. In an embodiment of the present invention, the downlink cooperative NOMA system 100 includes a base station 110 and K user equipments that will be divided into N groups (ie, groups 120_1, . . . , 120_N and user equipments 130_1, 130_2, . . . , 130_K-1, 130_K), wherein different groups are assigned orthogonal resources, and each group includes two user equipments sharing the same channel resource. Therefore, the number K of user equipments in the downlink cooperative NOMA system 100 is an even number greater than or equal to 2 (ie, K≧2 and K is an even number), and N=K / 2.

[0033] In addition, in practical applications, the base station 110 and the user equipment 130_1, 130_2, ..., 130_K-1, 130_K may be configured with N T and N R antennas to form a multiple-input multiple-output NOMA (MIMO-NOMA) downlink system 100, where N T and N R I...

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Abstract

The invention provides a joint user grouping and power distribution method and a base station using the method, applicable to a collaborative non-orthogonal multiple access system. The method providedby the invention comprises the following steps of sorting user devices according to K channel gains between the base station and the K user devices, and building a strong user candidate group including K / 2 user devices and a weak user candidate group including K / 2 user devices; pairing each one in the strong user candidate group with the one in the weak user candidate group, and meanwhile computing power distribution coefficients corresponding to the two user devices in each paired combination to divide the K user devices into K / 2 groups; and according to the power distribution coefficients corresponding to the K / 2 groups, transmitting messages to the K user devices.

Description

technical field [0001] The present invention relates to a joint user grouping (USER CLUSTERING) and power allocation method, and in particular to a joint user grouping suitable for a downlink cooperative non-orthogonal multiple access (NOMA) system with the power allocation method. Background technique [0002] Because non-orthogonal multiple access (NOMA) technology can provide higher transmission efficiency than traditional orthogonal multiple access technology under the same bandwidth resources, it has been regarded as the core of the fifth generation wireless communication system. One of the multiple access candidate technologies. [0003] In the NOMA system, user multiplexing can be performed in the power domain of the transmitting end, and then the multi-user signals are separated by using the successive interference cancellation (SIC) technology at the receiving end. Specifically, it is assumed that user devices with poor channel conditions are weak users in the sys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/08H04W52/24H04W72/04
CPCH04W4/08H04W52/241H04W72/0473
Inventor 王晋良刘人豪陈俊宇
Owner 王晋良
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