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Cell selection method, mobile station apparatus, and mobile communication system in hierarchical cell structure

一种移动通信系统、小区选择的技术，应用在无线通信、接入限制、电气元件等方向，能够解决不适当负荷分散、UE的电池消耗变多等问题

Inactive Publication Date: 2009-07-08
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, when the UE moves at a low speed in an overly large cell, there is still a problem that the battery consumption of the UE increases in order to communicate with the base station of the large cell during calling or location registration.
Furthermore, there is a problem that the traffic load is not properly distributed, and the load of the large cell becomes higher than the design value.

Method used

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  • Cell selection method, mobile station apparatus, and mobile communication system in hierarchical cell structure
  • Cell selection method, mobile station apparatus, and mobile communication system in hierarchical cell structure
  • Cell selection method, mobile station apparatus, and mobile communication system in hierarchical cell structure

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Embodiment Construction

[0072] Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.

[0073] In this embodiment, a moving speed determination method with higher accuracy is adopted compared with the prior art. The information needed by the UE to determine the mobility state (T CRMAX and N CR ), the parameters (surrounding cell information) required to select the transfer destination are the same as the priority level, use Figure 2 ~ Figure 4 The broadcast information (BCCH) shown is notified from the UTRAN to the UE.

[0074] Then, by providing cell selection logic and cell transition control in a plurality of UEs, UEs can also perform cell selection in accordance with the mobility state of their own station in a mobile communication system having a multi-layered cell structure.

[0075] Figure 7 This is a flowchart of the cell selection operation in this embodiment. UE first proceeds with Figure 5 The same initial cell...

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Abstract

In a radio mobile communication system adopting a hierarchical cell structure comprising a plurality of layers having respective cells of different sizes, the threshold value of the number of times of cell reselections and / or the threshold value of the time required to measure the number of times of cell reselections are set for each layer. A mobile station device compares the number of times of cell reselections in a specific time and / or the time required for the number of times of cell reselections to reach a specific value with the threshold values and selects a transfer target cell.

Description

technical field [0001] The present invention relates to a mobile communication system using Hierarchical Cell Structures (HCS) technology, a cell selection method for selecting a cell within the service range of such a mobile communication system, and a mobile station apparatus. Background technique [0002] With the demand for wireless services and the increase in traffic, techniques for increasing the capacity of mobile communication systems are widely used. As one of such techniques, the HCS technique has been proposed and used. [0003] For example, TR25.304 / 922 of the 3GPP (3rd Generation Partnership Project: 3rd Generation Partnership Project) standard is proposed for the cell structure using the HCS technology in the UMTS (Universal Mobile Telecommunications System: Universal Mobile Communications System), Furthermore, it describes in detail the cell selection logic (in idle mode and RRC connected mode) of the mobile station apparatus within the service range within ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/32
CPCH04W48/20H04W64/006H04W36/04H04W36/32H04W36/324H04W92/04
Inventor 渡边敬三长谷川一
Owner FUJITSU LTD
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