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A Fairness Improvement Method Applied to Inter-cell Relay Cellular Network Load Balancing

A load balancing and inter-cell technology, applied in the field of communications, can solve the problems of unsolved cellular system load balancing inter-cell and intra-cell user fairness, so as to improve inter-cell fairness, overcome unbalanced load distribution, reduce Effects of System Interference

Active Publication Date: 2020-07-31
NANJING DIGITGATE COMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0005] None of the above technical solutions solves the problem of cellular system load balancing and user fairness between cells and within cells

Method used

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Embodiment

[0057] Embodiment: An overloaded cell, a shared relay station, and six adjacent cells around it form a resource allocation and communication transmission architecture, and then combine the inter-cell relay model of spectrum division and time slot division to realize load transfer. The distance-weighted scheduling scheme redistributes subcarriers, and optimizes the relay coverage radius to improve system fairness.

[0058] First, set up a shared relay station at the adjacent place between the cells, as follows figure 1 shown. Assume that each cell has a coverage radius R BS is 100m. The number of users in the target cell is 74, and the number of users in the six adjacent cells is 40, 35, 30, 25, 20, and 15, and each cell is evenly distributed. The total subcarrier number K of the cell is 512, the subcarrier bandwidth w is 30KHZ, and the path loss index β is 2. Base data rate R per user requirement req 256Kbps.

[0059] Secondly, the overloaded cell, the shared relay stati...

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Abstract

The invention discloses a fairness improvement method for load balancing of an inter-cell relay cellular network. An overloaded cellular cell, a sharing relay station and surrounding adjacent cellular cells constitute a resource allocation and communication transmission system structure; load transferring is realized through an inter-cell relay model combining frequency spectrum division with time slot division, sub-carriers are reallocated through a distance weight based scheduling scheme, and the optimal covering radius of each relay is determined according to different loads of adjacent cells. In the cellular cell system, the scheme that a model based on frequency spectrum division and time slot division is arranged between two adjacent cells for relay sharing and load balancing is adopted, the distance weight based subcarrier reallocation algorithm and the inter-cell relay covering radium optimizing scheme are designed on the basis, and the resource utilization rate of a cell system and the overall user fairness of the cellular cell system can be improved.

Description

technical field [0001] The invention belongs to the technical field of communications, and in particular relates to a method for improving fairness applied to load balancing of inter-cell relay cellular networks. Background technique [0002] Because the Orthogonal Frequency Division Multiple Access (OFDMA) technology uses the Orthogonal Frequency Division Multiple Access (OFDM) modulation technology inside the cell, it can effectively eliminate the Intersymbol Interference (ISI) and avoid the interference in the cell. However, in the OFDMA wireless cellular communication system, different cells use the same spectrum resource, which results in serious inter-cell interference (ICI). Especially for users at the cell edge, their quality of service (QoS) is seriously affected. In the prior art, the use of simple handover between cells for load transfer cannot reduce system interference and improve system resource utilization. At present, there is an urgent need for a way to ove...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W16/10H04W16/18H04W28/08
CPCH04W16/10H04W16/18H04W28/08
Inventor 张宏泽鲁蔚锋
Owner NANJING DIGITGATE COMM TECH CO LTD
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