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Interference management method under partial channel state information in uplink

A technology for channel state information and interference management, which is applied in the uplink field of heterogeneous wireless networks and can solve the problems of increasing measurement and information exchange overhead.

Active Publication Date: 2016-05-04
XIDIAN UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, this article uses all the channel state information measured by the user, which increases the measurement and information interaction overhead

Method used

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  • Interference management method under partial channel state information in uplink
  • Interference management method under partial channel state information in uplink
  • Interference management method under partial channel state information in uplink

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Embodiment Construction

[0042] Below with reference to accompanying drawing, technical scheme and effect of the present invention are further described:

[0043] refer to figure 1 , the application system of the present invention includes a macro base station M, E home base stations and Ω users, and the Ω users are randomly distributed within the coverage of the macro base station. Each user can only connect to one base station, and each sub-channel under the base station can only be allocated to one user. In order to improve resource utilization, the home base station and the macro base station adopt a co-channel deployment method, and the spectrum allocation of the home base station can be allocated according to the existing graph theory method: adjacent home base stations use orthogonal spectrum, and the distance is relatively long The same frequency spectrum is used between femtocells.

[0044] refer to figure 2 , the implementation steps of the present invention are as follows:

[0045] Ste...

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Abstract

The invention discloses an interference management method under partial channel state information in an uplink. The method mainly solves the problem in the prior art that a resource distribution method is great in information interaction cost and an association control method is low in convergence speed. The method comprises following steps that: 1) a macro base station carries out association control to all users by a history subgradient descent method; 2), a home base station distributes resources to every user associated with the home base station according to a constructed home user utility function; 3), the macro base station firstly selects a reference home base station for every user associated with the macro base station and then distributes resources to every user associated with the macro base station according to a constructed macro user utility function. In application of the method, the cross layer interference and the information interaction cost are reduced; meanwhile, the system throughput and the convergence speed of the association control are improved; and the method is applicable to a macro base station and home base station coexisting heterogeneous wireless network.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to an interference management method of joint correlation control and resource allocation under partial channel state information in an Orthogonal Frequency Division Multiple Access (OFDMA) system, which can be used in heterogeneous wireless networks where macro base stations and home base stations coexist. uplink. Background technique [0002] Studies have found that about 50% of voice services and 70% of data services take place indoors. In order to meet the increasing data transmission demands of users, operators build a large number of femtocells under traditional macro base stations, forming a heterogeneous wireless network where macro base stations and femtocells coexist. [0003] In the downlink of the heterogeneous wireless network, since the transmission power of the home base station is very small, the macro user cannot perceive the channel stat...

Claims

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Application Information

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IPC IPC(8): H04W72/08
CPCH04W72/542
Inventor 赵林靖张燕张岗山张顺李钊刘勤
Owner XIDIAN UNIV
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