Robustness gaming power control method under imperfect CSI for multi-user OFDMA relay system

A relay system, power control technology, applied in power management, wireless communication, electrical components, etc., can solve problems such as incomplete correctness

Active Publication Date: 2015-12-23
CHONGQING UNIV OF POSTS & TELECOMM
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AI Technical Summary

Problems solved by technology

However, in practical networks, the channel estimation error will make the channel state information (CSI) of the base station (BS), relay and user on the link not completely correct

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  • Robustness gaming power control method under imperfect CSI for multi-user OFDMA relay system
  • Robustness gaming power control method under imperfect CSI for multi-user OFDMA relay system
  • Robustness gaming power control method under imperfect CSI for multi-user OFDMA relay system

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Embodiment Construction

[0037] Below in conjunction with accompanying drawing, the present invention will be further described:

[0038] The purpose of the present invention is to propose a multi-user and multi-relay OFDMA system that satisfies multi-user QoS and transmission power constraints under the constraints of user transmission interruption probability and transmission power in a multi-user and multi-relay OFDMA system with channel estimation errors. Control plan. A game power control model with the goal of maximizing network throughput is established, and an optimal user and relay transmission power scheme is proposed to ensure user QoS requirements and reduce mutual interference between users. In addition, a distributed power iterative control strategy is also proposed to achieve Nash equilibrium, calculate the user's transmit power, improve network capacity and reduce system outage probability.

[0039] ①Construction of multi-user OFDMA relay network model

[0040] Considering an uplink ...

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Abstract

The invention provides a robustness gaming power control method under imperfect CSI for a multi-user OFDMA relay system. The robustness gaming power control method converts a power control problem of a user into a noncooperative gaming problem. In consideration of the channel estimation error condition and on the premise of satisfying the power transmission constraint for users and the interruption probability constraint, the users compete with each other by controlling the emission power so as to maximize the self capacity. Based on a worst-case robustness resource distribution strategy, the algorithm takes the influence of the robustness gaming power control research channel estimation error of the worst channel estimation error on the network performance into account, and then establishes a corresponding network capacity maximization model. The existence and the uniqueness of nash equilibrium of robustness gaming is analyzed and proved, and a distributed robustness power control algorithm is further proposed to improve the network capacity. The simulation result shows that the robustness power control algorithm enables the users to get better performance and can effectively reduce occurrence of interrupt events in the system and belongs to an effective algorithm.

Description

technical field [0001] The invention relates to a power control technology under imperfect CSI in an OFDMA relay network, in particular to a method for controlling transmission power of multiple users and multiple relays on different channels. Background technique [0002] In a wireless network, the relay technology can greatly increase the transmission rate of the network, reduce the communication delay in the network, reduce the transmission power and expand the coverage of the network. Therefore, in recent years, research on relay network technology based on Orthogonal Frequency Division Multiple Access (OFDMA) system is of great significance and extremely challenging. For example, the multi-hop or multi-relay network under the OFDMA system is more complicated than the traditional single-hop or single-relay OFDMA network, and issues such as power allocation between relays and users need to be further considered. [0003] At present, most scholars study joint power alloca...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/24H04W52/26H04W52/46
CPCH04W52/241H04W52/265H04W52/46
Inventor 杨和林谢显中霍龙
Owner CHONGQING UNIV OF POSTS & TELECOMM
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