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Method for distributing power between multiple base stations and multiple antennae of TDD (Time Division Duplex) cooperative wireless network

A technology of a wireless network and an allocation method, which is applied in the research field of wireless resource management and can solve problems such as the problem that multi-base station multi-antenna power allocation cannot be applied.

Active Publication Date: 2013-06-12
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the downlink power allocation algorithm of the traditional multi-base station multi-antenna system is only applicable to the power allocation problem among multiple antennas of an independent base station, and cannot be applied to the power allocation problem among multi-base station multi-antennas in a cooperative wireless network

Method used

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  • Method for distributing power between multiple base stations and multiple antennae of TDD (Time Division Duplex) cooperative wireless network
  • Method for distributing power between multiple base stations and multiple antennae of TDD (Time Division Duplex) cooperative wireless network
  • Method for distributing power between multiple base stations and multiple antennae of TDD (Time Division Duplex) cooperative wireless network

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Experimental program
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Embodiment 1

[0054] It is assumed that in the multi-base station and centralized multi-antenna scenario of the TD-LTE / TD-LTE-A system, the number of transmitting antennas of each base station is L=2, and the size of the SINR sample value table in the base station is 5, namely K=5, each base station shares information with its 6 adjacent base stations, that is, N=7, and the base station power is limited to P max =30w, the operation period of each power allocation is 200 TTI, that is, j=200, the base station power adjustment coefficient δ=8, the number of radio frequency antennas selected by the base station for the mobile terminal is L 1 =2.

[0055] Step 1: Base station n (n=1,2,3...7) transmits signal power strength according to a certain mobile terminal The received power strength of the mobile terminal's wireless signal arriving at the base station measured by multiple radio frequency antennas l (l=1,2) and interference and noise signal power strength Select 2 receive power levels...

Embodiment 2

[0073] It is set in the multi-base station and distributed multi-antenna scenario of the TD-LTE / TD-LTE-A system, each base station is connected to 8 distributed radio frequency units, each radio unit has 1 antenna, and the signal-to-interference-noise ratio sample in the base station The size of the value table is 5, that is, K=5. Each base station shares information with its 6 adjacent base stations, that is, N=7, and the base station power is limited to P max =20w, the operation period of each power allocation is 200 TTI, that is, j=200, the base station power adjustment coefficient δ=5, the number of radio frequency antennas selected by the base station for the mobile terminal is L 1 =4.

[0074] Step 1: Base station n (n=1,2,3...7) transmits signal power strength according to a certain mobile terminal The received power strength of the wireless signal received by the mobile terminal to the base station measured by multiple radio frequency antennas l (l=1,2,...8) and i...

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Abstract

The invention discloses a method for distributing power between multiple base stations and multiple antennae of a TDD (Time Division Duplex) cooperative wireless network. The method comprises the following steps that each base station selects L1 radio-frequency antennae with higher receiving power intensity to constitute a cooperative antenna set; each base station estimates the SINR (Signal to Interference Plus Noise Ratio) of a terminal according to the receiving signal power intensity, interference and noise signal power intensity of the terminal and shares the SINR with N-1 adjacent base stations; then each base station sequences N SINRs in an SINR stable of the adjacent base stations from small to large, and whether the base station participates in cooperative sending or not is judged; the sending total power of the base station which participates in cooperative sending is updated; and power distribution is performed on the L1 antennae in the cooperative antenna set according to the updated total power. The method has the characteristics of improving the power efficiency of a wireless network system, reducing the wireless signal sending power, enhancing the wireless signal transmission reliability and reducing the complexity of a power distribution algorithm.

Description

technical field [0001] The invention relates to a method for power distribution between multiple base stations and multiple antennas in a TDD cooperative wireless network, which belongs to the wireless resource management research technology in a mobile communication system. Background technique [0002] In broadband wireless communication systems based on multiple-input multiple-output-orthogonal frequency division multiplexing (MIMO-OFDM for short), in order to improve spectrum utilization, a networking method with a frequency reuse factor of 1 is generally adopted; however, this The networking method will generate strong inter-cell interference at the edge of the cell, seriously affecting the coverage and capacity of the system and the signal quality of edge users. If an effective method is not adopted to solve the inter-cell interference problem, the actual communication system will not be able to fully tap the potential performance gain of the MIMO-OFDM technology. [...

Claims

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Application Information

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IPC IPC(8): H04W52/24H04W52/42
Inventor 赵新胜许海波王超
Owner SOUTHEAST UNIV
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