Combined channel assignment and power control method of home base station system

A joint channel and home base station technology, applied in the field of communication, can solve problems such as limiting network performance

Inactive Publication Date: 2013-04-24
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the cross-layer interference between the femtocell network and the macrocell network and the interference within the femtocell network layer will greatly limit the performance of the network

Method used

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  • Combined channel assignment and power control method of home base station system
  • Combined channel assignment and power control method of home base station system
  • Combined channel assignment and power control method of home base station system

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0047] The specific embodiment of the present invention is as follows.

[0048] 1. Establish capacity optimization model of Femtocell system

[0049] This part mainly studies the allocation of power and channels to maximize the uplink capacity. This optimization problem can be formulated as:

[0050]

[0051]

[0052]

[0053]

[0054]

[0055] It can be seen that the above optimization problem belongs to mixed integer programming and belongs to NP-hard problem. To solve this problem, we introduce . Then the above problem can be expressed as:

[0056]

[0057]

[0058]

[0059] It can be seen that the above problem can be solved by convex optimization theory, and changed to Lagrangian form as:

[0060]

[0061]

[0062] =

[0063]

[0064] but ,

[0065] in,

[0066]

[0067] i.e. solve can be transformed into a solution independent of each other ,Depend on condition, you can get:

[0068]

[0...

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Abstract

The invention aims at providing a combined channel assignment and power control method of a home base station system. According to the method, the channel assignment and power control of a home network are combined through an optimized object, and compared with an interference-minimum principle, a convex optimization and subgradient method is adopted to solve the closed form of power, so that the maximization of the network capacity of a home base station is ensured; and in addition, the optimization of the network capacity of the home base station is correlated with the optimization of the capacity of a macro base station, and channels are reasonably distributed for a macros user, so that the capacity of a macros base station achieves maximum under a same condition. Compared with a simple power control algorithm, the combined channel assignment and power control method provided by the invention has the advantages that not only can the network capacity of the home base station be greatly increased, but also the capacity of the macro base station is increased.

Description

technical field [0001] The invention relates to a scheme for realizing channel allocation and power control of a home base station in a home base station system, and belongs to the technical field of communication. [0002] Background technique [0003] As a new technology to improve the indoor communication rate of mobile users, the femtocell system is attracting more and more attention. Users place home base stations (HBS) in their homes or offices, and the home base stations communicate with network service providers through DSL or cable. From the user's point of view, the indoor service quality and call rate are improved. From the perspective of network service providers, the pressure on the macro base station (MBS) is relieved, and the overall coverage area and capacity of the network are improved. Therefore, femtocells are increasingly becoming an effective technology for high-speed wireless applications. [0004] In order to improve spectrum utilization and meet ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/04H04W72/04
Inventor 朱琦穆施瑶
Owner NANJING UNIV OF POSTS & TELECOMM
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