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Method for improving soft-frequency reuse in OFDM system

A soft frequency reuse and frequency band technology, applied in the field of inter-cell interference coordination, can solve the problem of not considering the allocation and adjustment of frequency and power resources, etc., to improve operability and effectiveness, good promotion and application prospects, and improve cell The effect of edge throughput

Active Publication Date: 2009-12-09
COMBA TELECOM SYST CHINA LTD
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Problems solved by technology

[0007] In view of this, the purpose of the present invention is to provide an improved method for soft frequency reuse of OFDM systems, the present invention can solve the problem of how to allocate and adjust frequency and power resources in the existing soft frequency reuse technology In order to further improve the operability of soft frequency reuse, increase the frequency resource utilization of the system, and optimize the power of each user on the premise of taking into account the quality of service of users, improve the throughput of cell edge users. and improve the overall throughput of the cell

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  • Method for improving soft-frequency reuse in OFDM system
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  • Method for improving soft-frequency reuse in OFDM system

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Embodiment Construction

[0035] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and good embodiments.

[0036] see figure 2 , introduce the specific operation steps of the improved method of the soft frequency multiplexing that the present invention is used for OFDM system:

[0037] Step 1. Divide the main and auxiliary frequency bands for each cell in turn according to the priority of the cells: obtain various parameters of each cell including coverage, geographical environment, user load and business distribution, and use them to perform primary and auxiliary frequency band allocation for all cells in the system Allocation is sorted by priority, so that according to the priority order of each cell in the system, each cell is divided into primary and secondary frequency bands in sequence from high to low.

[0038] This step further includes the...

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Abstract

The invention discloses a method for improving soft-frequency reuse in an OFDM (Orthogonal Frequency Division Multiplex) system. The method comprises the following operating steps: dividing main and auxiliary frequency channels for each cell according to the cell priority level in turn; adjusting the central area coverage of the current cell; carrying out the power optimization according to the communication target value of subscribers. By taking the relation between the quantities of main and auxiliary sub-carriers and the service load intensity of the central area and the edge area of the cell as a parameter, when the service distribution in the cell is not uniform, the method can adjust the central area coverage of the current cell and compromise between the main sub-carrier orthogonality of a neighbor cell and the entire frequency resource utilization rate of the cell, so as to improve the operability and availability of the soft-frequency reuse. The disturbance of the central area of the cell to the edge area thereof can be reduced by setting a communication target value for each subscriber terminal and taking the corresponding power control so that the edge throughout and total throughout of the cell can be increased on the basis that the quality of subscriber services is guaranteed.

Description

technical field [0001] The present invention relates to an improvement or optimization method for soft frequency multiplexing of OFDM system, to be exact, relates to a kind of wireless cellular network system of orthogonal frequency division multiplexing, which uses soft frequency multiplexing technology to carry out cell An improved method for inter-interference coordination belongs to the technical field of wireless communication. Background technique [0002] The ever-increasing amount of information and types of information services require the use of communication technologies with higher transmission rates. Orthogonal Frequency Division Multiplexing (OFDM, Orthogonal Frequency Division Multiplex) technology can greatly improve spectral efficiency, and is the most promising solution for next-generation wireless communication systems. One of the best transmission techniques. In the case of co-frequency networking of a cellular communication system, OFDM can ensure that ...

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Application Information

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IPC IPC(8): H04W16/18H04W28/08H04W72/12
CPCY02D30/70
Inventor 彭木根韩斌李莉王文博
Owner COMBA TELECOM SYST CHINA LTD
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