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Multi-cell power allocation method based on interference cost information in next generation wifi

An allocation method and next-generation technology, applied in power management, wireless communication, electrical components, etc., can solve the problems of system inter-cell interference, inter-cell co-channel interference, etc., to maximize system throughput and meet user service quality. Effect

Active Publication Date: 2018-05-08
SOUTHEAST UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In a multi-cell OFDMA system, because the subcarriers of different users in a cell are orthogonal to each other, intra-cell interference is effectively avoided, but the multiplexing of same-frequency subcarriers in different cells will bring serious inter-cell interference to the system
[0005] Therefore, it is urgent to design a multi-cell power allocation scheme to solve the same-frequency interference problem between cells in the next generation of WiFi

Method used

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  • Multi-cell power allocation method based on interference cost information in next generation wifi
  • Multi-cell power allocation method based on interference cost information in next generation wifi
  • Multi-cell power allocation method based on interference cost information in next generation wifi

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Embodiment Construction

[0051] to combine figure 1 The flow of the multi-cell power allocation method of the present invention is described.

[0052] Step 1. Initialization: Obtain channel information, establish a functional relationship between user channel capacity and base station power, and combine load information to establish each user channel allocation matrix. The steps are as follows:

[0053] Consider a multi-cell downlink communication system. Taking an OFDMA system of M cells as the research object, assuming that there are S subcarriers, X and S represent the set of cells and the set of subcarriers respectively, Ψ m Denotes the set of all users in cell m.

[0054] Assume that all cells share a total bandwidth B, so co-channel interference exists between adjacent cells. Cell power matrix Indicates the power allocation strategy of the base station of cell m, Indicates the transmission power of user k on subcarrier s in cell m, Indicates the total transmission power of cell m on sub...

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Abstract

The invention discloses an interference cost information based multi-cell power distribution method for WiFi of the next generation. The method comprises the steps that channel information is obtained, the function relation between a subscriber channel capacity and a base station power is established, and channel distribution array for subscribers in each cell is established by combining load information; an objective function and constraint condition are optimized aimed at maximizing the system throughput, and an optimal power distribution scheme is obtained in a KKT method; and according to the optimal solution and the channel distribution array, power of cells is distributed, and the interference cost information is updated in an iteration manner. The interference cost information based multi-cell power distribution method can effectively coordinate co-frequency interference among cells, satisfy service quality and maximize the system throughput.

Description

technical field [0001] The invention belongs to the field of mobile communication, in particular to a multi-cell power allocation method based on interference cost information in next-generation WiFi. Background technique [0002] With the wide application of WiFi networks, in order to meet people's needs for the speed and signal performance of WiFi networks, WiFi technology has undergone many changes. When IEEE 802.11ac is about to become the mainstream, IEEE is also launching the formulation of the next-generation WiFi standard 802.11ax. The transmission rate of 802.11ax can reach 10.53Gbps, which is 10 times the transmission speed of the current IEEE 802.11ac standard. The 802.11ax standard will use Orthogonal Frequency Division Multiple Access (OFDMA, Orthogonal Frequency Division Multiple Access) technology to improve spectral efficiency and better manage crosstalk, thereby improving WiFi performance in a multi-user environment. [0003] OFDMA technology can effective...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W52/34
CPCH04W52/243H04W52/343
Inventor 夏玮玮林子敬沈连丰胡静宋铁成
Owner SOUTHEAST UNIV