Apparatus and method for allocating resources of a virtual cell in an OFDM mobile communication system

Abstract

A virtual cell management apparatus and method using sectors in an orthogonal frequency division multiplexing mobile communication system including a cell structure having cells each comprised of a plurality of sectors, the cells performing data communication with mobile terminals within a corresponding cell through at least one subchannel having orthogonality. The method comprises forming a virtual cell with a particular one of sectors constituting a particular cell and sectors of two other cells neighboring the particular sector; transmitting, by three base stations forming the virtual cell, an interference measurement value and a channel parameter estimation value from a mobile terminal located in the virtual cell to a base station controller that controls the virtual cell, thereby allocating wireless resource including frequency bandwidth, initial bits, subcarriers and refined bits in the virtual cell; transmitting the allocated wireless resource to the three base stations so that the base stations allocate a same subchannel to each mobile terminal located in the virtual cell; and transmitting same data over the allocated subchannel.

Description

[0001] This application claims priority to the application entitled "Apparatus and method for allocating resources of a virtual cell in a OFDM mobile communication system" under 35 U.S.C. §119 , which was filed with the Korean Industrial Property Office on September 30, 2002 and assigned serial number No. 2002-59622, the contents of which are incorporated herein by reference. technical field [0002] The present invention generally relates to a device and a method for managing a virtual cell (virtual cell) in an OFDM mobile communication system, and specifically relates to a device and a method for managing virtual cell resources. Background technique [0003] Generally, Orthogonal Frequency Division Multiplexing (hereinafter referred to as "OFDM") is defined as a two-dimensional access technology, which is time division access (TDA) and frequency division access (FDA) combination technology. Therefore, in OFDM data transmission, OFDM symbols are respectively carried by cor...

AI Technical Summary

Problems solved by technology

[0013] First, if some subchannels of a particular user experience deep fading or interference due to increased fixed channel allocation, the BER performance will be poor

[0014] Second, when the frequency reuse factor is 3, the frequency efficiency is low

In this case, a cell that has reached its supportable traffic limit cannot borrow unused channels in neighboring cells as the case may be

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