Method for managing neighbor femto BS list in a broadband wireless access system

A technology of femto base stations and adjacent base stations, which is applied in power management, access restriction, wireless communication, etc., can solve the problems of only considering the physical distance and not considering the existence or non-existence of the wireless communication channel state, so as to avoid scanning, Effect of preventing data transmission delay

Inactive Publication Date: 2015-03-18
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the neighbor list is made based on the location information of the FBS, only the physical distance is considered for the neighbor list, and the channel status or the presence or absence of obstacles affecting the wireless communication between the FBS and neighboring BSs is not considered

Method used

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  • Method for managing neighbor femto BS list in a broadband wireless access system
  • Method for managing neighbor femto BS list in a broadband wireless access system
  • Method for managing neighbor femto BS list in a broadband wireless access system

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Embodiment 1

[0080] To avoid the inefficient neighbor list management described above, FBSs detect neighboring BSs (mostly FBSs) by attempting to scan themselves according to one embodiment of the present invention.

[0081] When the FBS successfully provides service to the AMS in the active state (ie, through normal operation), it should inform the AMS of the expected scan time and scan interval in order to scan neighboring BSs. This is because the FBS cannot provide service to the AMS during the scan interval. The time interval during which the FBS interrupts the AMS scheduling and scans for neighboring BSs by itself will be referred to as a "scanning interval (SCI)" or "unavailable time interval (UTI)". The time interval during which the FBS can provide a normal service to the AMS without scanning neighboring BSs will be referred to as a 'normal interval'.

[0082] The AMS may be scheduled to exchange data during the normal interval or scan or range another BS during the SCI based on t...

Embodiment 2

[0118] In the above embodiments, the FBS can provide the latest network topology information for the AMS by making or updating its neighbor list by using the scan of neighboring BSs.

[0119] Unlike the macro cell, the FBS detects neighboring BSs via the air interface. Therefore, if a detected neighbor BS is to be accepted as a neighbor BS or does not meet predetermined criteria, a trigger condition for adding or removing the BS to the neighbor list is required. The same is true for AMS scans of FBS. For example, as previously referred to figure 2 Said, upon receiving a request for network topology information from the FBS, the AMS may start scanning neighboring BSs and report only those neighboring BSs that satisfy the trigger condition among the detected neighboring BSs to the FBS.

[0120] Accordingly, according to another embodiment of the present invention, a neighbor list update / report trigger condition will be provided.

[0121] Table 2 below shows an exemplary repo...

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Abstract

A method for updating a neighbor list at a femto Base Station (BS) is disclosed. The method includes broadcasting a first broadcast message including information about an unavailable time interval during which scheduling is not performed for Mobile Stations (MSs), scanning at least one neighbor BS during the unavailable time interval, and updating the neighbor list according to a result of the scanning.

Description

technical field [0001] The present invention relates to a broadband wireless access system, and more particularly, to a method of managing a neighbor base station (BS) list by efficiently scanning neighbor base stations at a femto BS (FBS). Background technique [0002] A femtocell will be briefly described. [0003] Femto (femto) is a prefix in the metric system, denoting 10 -15 factor. Accordingly, a femtocell or FBS refers to a very small indoor access point (AP) for low power home use or office use. Although the term "femtocell" is sometimes used interchangeably with "picocell," the former is used in the sense of a more advanced cell. The FBS is a small cell BS connected to a broadband router and used to connect second generation (2G) and third generation (3G) voice and data to a backbone network of a mobile communication service provider via Digital Subscriber Line (DSL). [0004] A research report was released in which it was reported that FBS will accelerate 3G de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W48/16H04W48/10
CPCH04W36/0083H04W84/045H04W36/00835G06F15/16H04W48/10H04W48/16H04W52/38H04W84/10
Inventor 郑仁旭金龙浩柳麒善李真
Owner LG ELECTRONICS INC
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