Method for coordinating interference between cells of relay wireless communication network

Abstract

The invention discloses a method for interference coordination among cells of a wireless communication network; the method comprises the following steps: A. a base station sets limited interference sources thereof; B. the base station sets regional division threshold according to the distribution of the limited interference sources and divides the overlay area thereof into a non-interference area, a transition area and a limited interference source area according to the threshold; C. the base station configures channel loss compensation factors and time frequency resources for each layer according to the limited interference source; and D. the base station carries out adjustment to the transmitting power of a subsidiary user terminal thereof. The method limits the interference of adjacent cells to be in a certain range, thus effectively solving the problem that the system expenditure in interference coordination among the cells is overlarge, the time delay of the round trip is overlong, or when the load is heavier or is full, the problem that the occupied time frequency resource of the interference source is difficult to be orthogonal is difficult to be guaranteed and the like.

Description

technical field [0001] The invention relates to a wireless communication network, in particular to a method for coordinating inter-cell interference of the wireless communication network. Background technique [0002] In the next-generation broadband wireless communication network, solving the inter-cell interference in the wireless communication network becomes a key factor to improve inter-cell UT (user terminal) throughput and average UT throughput, and faces severe challenges. [0003] At present, in IEEE 802.16j, IMT-Advanced, and WINNER, methods such as interference randomization, interference coordination, and interference cancellation are proposed to solve the problem of inter-cell interference. In LTE, it is proposed to divide the cell coverage area into inner layer and outer layer according to the strongest interference level from UT to all adjacent cells, and adopt partial power control and path loss compensation methods to solve inter-cell interference. Among th...

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Problems solved by technology

However, when the load is relatively heavy, it is difficult to ensure that the time-frequency resources used by adjacent cells remain orthogonal through scheduling, although the time-frequency resources used by adjacent cells can be distinguished by setting sensitive areas. Some are completely orthogonal, but reduce the flexibility of scheduling, and reduce the spectrum utilization rate during partial power control and path loss compensation, resulting in a decrease in the throughput of the UT at the cell edge and the average throughput of the UT

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