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Handoff system using an initial ranging scheme in a broadband wireless access communication system and method for controlling the same

A technology of initial ranging and handover, applied in the field of ranging, can solve problems such as SS mobility that has not been proposed

Inactive Publication Date: 2005-11-16
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the IEEE 802.16e communication system does not propose a new method for improving SS mobility in a multi-cell environment

Method used

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  • Handoff system using an initial ranging scheme in a broadband wireless access communication system and method for controlling the same
  • Handoff system using an initial ranging scheme in a broadband wireless access communication system and method for controlling the same
  • Handoff system using an initial ranging scheme in a broadband wireless access communication system and method for controlling the same

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Embodiment Construction

[0045] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the drawings, the same or similar elements are denoted by the same reference numerals even when described in different drawings. In the following description, descriptions of known functions and structures incorporated herein will be omitted when they would make the subject matter of the present invention unclear.

[0046] Figure 4 is a block diagram of a BWA communication system using an OFDM / OFDMA scheme according to a preferred embodiment of the present invention;

[0047] in the description Figure 4 Before the BWA communication system in , it should be noted that the IEEE 802.16e communication system has not been developed as a communication system considering the mobility of the SS in the IEEE 802.16a communication system. Assuming that the mobility of the SS is considered in the IEEE 802.16a communication system, it is possible to c...

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Abstract

A communication system using an OFDM (Orthogonal Frequency Division Multiplexing) scheme. The communication system receives neighbor BS (Base Station) information of a plurality of neighbor BSs associated with a plurality of cells adjacent to a cell and uplink-associated information needed for transmitting data to the first BS from the first BS, requests synchronization information needed for establishing synchronization acquisition between the SS and the first BS from the first BS, monitors the plurality of neighbor BSs on the basis of the neighbor BS information associated with the neighbor BSs, and establishing a handoff with the second BS which is one of neighbor BSs based on the result of the neighbor BSs.

Description

technical field [0001] The present invention relates generally to a ranging method used in a broadband wireless access communication system, and more particularly to handover using an initial ranging process in a broadband wireless access communication system using an OFDM (Orthogonal Frequency Division Multiplexing) scheme system and its control method. Background technique [0002] Recently, many developers have intensively studied 4G (Fourth Generation) communication system, one of next-generation communication systems, in order to provide specific services with various QoS (Quality of Service) to a large number of users at a transmission rate of about 100 Mbps. Currently, in an outdoor channel environment with a relatively poor channel environment, a 3G (third generation) communication system provides a transmission rate of about 384Kbps, and in an indoor channel environment with a relatively good channel environment, it can provide a maximum transmission rate of about 2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/16H04L12/28H04L27/26H04W36/08H04W36/12H04W36/18
CPCH04W36/0055H04L27/2601
Inventor 具昌会孙仲济金昭贤
Owner SAMSUNG ELECTRONICS CO LTD
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