Frequency multiplexing networking method and system

A frequency reuse and networking technology, applied in the field of communications, can solve the problems of edge user interference, low frequency utilization, large inter-cell co-channel interference, etc., to improve overall performance, improve frequency utilization, and reduce co-channel interference. Effect

Inactive Publication Date: 2012-03-21
CHINA MOBILE COMM GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] When the second method is used for networking, the frequency utilization rate of the entire network is high, but the same frequency interference between cells is relatively large, especially the edge user interference is serious, and its control channel may not work normally.
[0013] It can be seen that the existing networking mode or the frequency utilization rate is too low, or the same frequency interference between cells is too large, and the overall system performance is not ideal.

Method used

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  • Frequency multiplexing networking method and system
  • Frequency multiplexing networking method and system
  • Frequency multiplexing networking method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Figure 4 It is a schematic diagram of the first networking provided by the present invention.

[0063] exist Figure 4 In the system, the total available frequency band bandwidth of the system is 30 MHz, which is divided into 3 sub-bands, each of which is 20 MHz, and two parts overlap. The three cells at the same site occupy different subbands among the three subbands, for example Figure 4 As shown, cells A, B, and C occupy subbands A, B, and C, respectively.

[0064] Figure 5 It is a schematic diagram of the second networking provided by the present invention.

[0065] exist Figure 5 In the system, the bandwidth of the total available frequency band of the system is 15 MHz, which is divided into 3 sub-bands, each of which is 10 MHz, and two parts overlap. The three cells at the same site occupy different subbands among the three subbands, for example Figure 5 As shown, cells A, B, and C occupy subbands A, B, and C, respectively.

Embodiment 2

[0067] Figure 6 It is a schematic diagram of the third networking provided by the present invention.

[0068] Depend on Figure 6 It can be seen that when the bandwidth of the total available frequency band of the system is 40 MHz or 50 MHz, the total available frequency band of the system can still be divided into three sub-bands, and the three cells at the same site respectively occupy different sub-bands of the three sub-bands .

[0069] Compared with Embodiment 1, since the bandwidth of the total available frequency band of the system in Embodiment 2 is increased, the ability of the communication system to avoid interference will be improved, and the dependence on the inter-cell interference coordination (ICIC) algorithm and scheduling algorithm will also be reduced. will be further reduced to obtain better system performance.

Embodiment 3

[0071] Figure 7 It is a schematic diagram of the fourth networking provided by the present invention.

[0072] Such as Figure 7 As shown, the total available frequency band bandwidth of the system is 30MHz, which is divided into two subbands, subband A and subband B, each subband is 20MHz, and the two subbands overlap each other by 10MHz, cell A and cell B Occupy sub-band A and sub-band B respectively.

[0073] In the actual communication process, cell A preferentially uses the 10MHz frequency band of the left 1 / 3 of the entire bandwidth, that is, preferentially uses the part of subband A that does not overlap with subband B, and cell B preferentially uses the 10MHz frequency band of the right 1 / 3 of the entire bandwidth. That is, the part of the subband B that does not overlap with the subband A is preferentially used. When the cell load increases, each cell can use the overlapping portion for communication.

[0074] For example, when the load of cell A rises to a prede...

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Abstract

The invention provides a frequency multiplexing networking method and system. The method comprises the following steps: occupying subbands allocated out from total available frequency bands of a communication system by all cells, wherein the subbands occupied by at least two cells are mutually and partially overlapped; allocating the total available frequency bands of the communication system into N subbands in advance, wherein N is an integer which is greater than 1, thereby, frequency use ratio and the same frequency interference among the cells are balanced, and the overall performance of the system is improved.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to a method and system for frequency multiplexing networking. Background technique [0002] Currently, the Long Term Evolution (LTE) system mainly adopts the following two networking methods: [0003] Mode 1, adopting a networking mode with a frequency reuse factor of N, where N is an integer greater than 1. [0004] In the first way, the total available frequency band of the LTE system is divided into multiple frequency bands, and there is no overlap between the frequency bands, and different cells use different frequency bands. [0005] figure 1 It is a schematic diagram of networking when the frequency reuse factor is 3. [0006] Such as figure 1 As shown, the total available frequency band bandwidth of the system is 60MHz. The 60MHz system bandwidth is divided into 3 frequency bands, each frequency band is 20MHz, and the frequency bands do not overlap with each...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J1/00
Inventor 姜大洁刘光毅崔春风黄宇红
Owner CHINA MOBILE COMM GRP CO LTD
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