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Heterogeneous service QoS based LTE network inter-cell interference ordination method

A technology of inter-cell interference and coordination methods, applied in network planning, electrical components, wireless communication, etc., can solve the problem that the central area of ​​the cell is not finely divided, so as to improve the throughput of the cell edge and reduce the signaling interaction overhead. Effect

Inactive Publication Date: 2011-03-02
XIDIAN UNIV
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AI Technical Summary

Problems solved by technology

The traditional SFR scheme adopts a complex non-overlapping frequency resource allocation scheme at the edge of adjacent cells to reduce co-channel interference from the edge of adjacent cells, and the central area of ​​each cell is not finely divided

Method used

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  • Heterogeneous service QoS based LTE network inter-cell interference ordination method
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  • Heterogeneous service QoS based LTE network inter-cell interference ordination method

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Embodiment Construction

[0038] see figure 2 , the concrete steps of the present invention are as follows:

[0039] Step 1: Divide the serving cell where the user resides and define four service types.

[0040] 1a) Divide the central area and the edge area. In this example, the service area is divided according to the radius of the service area. The radius of the service area is set to be R meters, the range of the central area is 0-r meters, and the range of the edge area is r-R meters;

[0041] 1b) According to the real-time service and minimum rate requirements, define four service types for all users in the cell: real-time-low rate service, real-time-high rate service, non-real-time-low rate service and non-real-time-high rate service.

[0042] Step 2, the number of resource blocks, service priority and maximum delay required by each service are shown in Table 1:

[0043] Table 1

[0044] business type

number of resource blocks required

service priority

Maximum delay(ms) ...

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Abstract

The invention discloses a heterogeneous service QoS based LTE network inter-cell interference ordination method and solves the problem of low throughput of cell-edge users. The method comprises the steps of: (1) demarcating a service cell and defining business type, (2) giving the source block number for each type of business, service priority and maximum delay, (3) sequencing the source blocks in a system band, (4) demarcating a common frequency pond from the sequenced system band, (5) calculating the edge business load index through each cell and determining the demarcating method of the common frequency, (6) regionalizing the center of the cell and defining the source allocation index for each region and (7) allocating the source block to the edge user through each cell and then allocating the source block to the center user according to the source allocation index. The method of the invention can adapt to the change of cell edge business, decrease the signaling expense, and increase the throughput of the cell edge and the whole throughput of the system.

Description

technical field [0001] The invention belongs to the field of wireless communication, and relates to interference coordination between network cells, in particular to a method for realizing downlink interference coordination between cells combined with multi-point coordination, which can be used in LTE heterogeneous service networks. Background technique [0002] In the LTE network, when adjacent cells use the same frequency resources, inter-cell interference will occur, which seriously affects the performance of the LTE network. In order to eliminate inter-cell interference, increase the data rate of cell-edge users, and improve the throughput and average spectrum efficiency of the entire system, various inter-cell interference elimination technologies were analyzed during the LTE technology research. There are currently three interference elimination methods: inter-cell interference randomization algorithm, inter-cell interference elimination algorithm and inter-cell interf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/10H04W16/14
Inventor 杨清海张海超宋海路傅丰林
Owner XIDIAN UNIV
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