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CoMP-based heterogeneous network resource allocation method and system

A heterogeneous network and resource allocation technology, applied in transmission systems, digital transmission systems, electrical components, etc., can solve problems such as failure to achieve joint allocation of power and channels, limited performance improvement, etc.

Active Publication Date: 2018-01-23
SUZHOU UNIV
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Problems solved by technology

However, this scheme does not realize the joint allocation of power and channels, which makes the performance improvement of the system very limited.

Method used

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  • CoMP-based heterogeneous network resource allocation method and system
  • CoMP-based heterogeneous network resource allocation method and system
  • CoMP-based heterogeneous network resource allocation method and system

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Embodiment Construction

[0043] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0044] Such as figure 1 As shown, it is a downlink structural diagram of a heterogeneous network based on Orthogonal Frequency Division Multiple Access (OFDMA), and the base stations of each layer in the heterogeneous network support CoMP joint transmission. The network consists of a macro base station and B small base stations. Wherein, the serial number of the macro base station is 0, and the serial numbers of each small base station are 1 to B. These base stations share C subchannels and jointly provide services to U users. The maximum transmission power of any base station b is In joint transmission mode, each channel can be used by multiple base stations at the same time to transmit data to the same user. However, according to the requirements of OFDMA, each channel can only be assigned to one user at most in a given time slot....

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Abstract

The invention provides a CoMP-based heterogeneous network resource allocation method and system. According to the method, resource co-allocation is described as the problem of nonlinear mixed integerprogramming, and the iterative algorithm of low complexity is designed to search the optimal solution of the problem. The original resource co-allocation problem is decomposed into two sub-problems ofchannel allocation and power allocation in each time of iteration so as to reduce the computing complexity. The greedy algorithm is put forward for the sub-problem of channel allocation to solve theoptimal solution. The water-filling algorithm based on iteration is designed for the decomposed sub-problem of power allocation. Channel and power allocation is performed based on the acquired result.The theoretical analysis proves that the method can obtain the optimal solution within the reasonable time at the low complexity.

Description

technical field [0001] The present invention relates to the field of network resource allocation, in particular to a CoMP-based heterogeneous network resource allocation method and system. Background technique [0002] In recent years, the explosive growth of mobile data traffic has made the traditional single-layer network coverage unable to meet the demand. Heterogeneous networks are regarded as an effective solution for future wireless communications. By deploying small cells (microcells, picocells, femtocells) or relays in macrocells, the distance between the transmitter and receiver is shortened, and the network capacity is significantly improved. However, since the spectrum is usually shared between cells of different layers to improve spectral efficiency, cross-layer co-channel interference is a serious problem, which will hinder the performance improvement and wide application of heterogeneous networks. [0003] Coordinated Multi-Point (CoMP) is a technology used t...

Claims

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Application Information

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IPC IPC(8): H04W72/04H04W72/08H04W72/12H04L5/00
Inventor 马冬高云盛洁朱灿焰
Owner SUZHOU UNIV
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