Method for allocating resources in a multicarrier system and transmission apparatus using the same
First Claim
1. A method for allocating resources for individual sectors in an orthogonal frequency division multiplexing (OFDM) mobile communication system, the method comprising the steps of:
- dividing a hill subcarrier band into a first subcarrier region and a second subcarrier region having a same size;
allocating subcarriers selected from the first subcarrier region based on a first subcarrier allocation pattern as downlink resources for sectors in a first service zone among a plurality of sectors included in one cell;
allocating subcarriers selected from the second subcarrier region based on a second subcarrier allocation pattern as downlink resources for sectors in a second service zone; and
performing one of a first operation and a second operation when a load for a downlink in one of the sectors is greater than a load for a downlink in a neighboring sector,wherein the cell includes a predetermined number of sectors, the predetermined number is a multiple of 2 and is at least equal to 6, and the sectors in the first service zone neighbor the sectors in the second service zone,wherein the first operation comprises releasing downlink resources allocated for the neighboring sector and then reallocating the released downlink resources as downlink resources for the one of the sectors, and the second operation comprises narrowing an antenna beamwidth forming the one of the sectors and widening an antenna beamwidth forming the neighboring sector.
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Abstract
In an orthogonal frequency division multiplexing (OFDM) mobile communication system, an apparatus and method allocates resources for data transmission and transmits/receives user data using the allocated resources. A full subcarrier band allocable for one cell is divided into a plurality of subcarrier regions. Subcarriers selected from subcarriers existing in one of the plurality of subcarrier regions are allocated for each of a plurality of sectors constituting the cell. The subcarriers are allocated such that subcarriers existing in different subcarrier regions are allocated for neighboring sectors in the cell.
14 Citations
16 Claims
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1. A method for allocating resources for individual sectors in an orthogonal frequency division multiplexing (OFDM) mobile communication system, the method comprising the steps of:
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dividing a hill subcarrier band into a first subcarrier region and a second subcarrier region having a same size; allocating subcarriers selected from the first subcarrier region based on a first subcarrier allocation pattern as downlink resources for sectors in a first service zone among a plurality of sectors included in one cell; allocating subcarriers selected from the second subcarrier region based on a second subcarrier allocation pattern as downlink resources for sectors in a second service zone; and performing one of a first operation and a second operation when a load for a downlink in one of the sectors is greater than a load for a downlink in a neighboring sector, wherein the cell includes a predetermined number of sectors, the predetermined number is a multiple of 2 and is at least equal to 6, and the sectors in the first service zone neighbor the sectors in the second service zone, wherein the first operation comprises releasing downlink resources allocated for the neighboring sector and then reallocating the released downlink resources as downlink resources for the one of the sectors, and the second operation comprises narrowing an antenna beamwidth forming the one of the sectors and widening an antenna beamwidth forming the neighboring sector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A transmission apparatus in an orthogonal frequency division multiplexing (OFDM) mobile communication system for transmitting user data for individual sectors, the apparatus comprising:
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a subcarrier allocator for dividing a full subcarrier band into a first subcarrier region and a second subcarrier region having a same size, allocating subcarriers selected from the first subcarrier region based on a first subcarrier allocation pattern as downlink resources for sectors in a first service zone, and allocating subcarriers selected from the second subcarrier region based on a second subcarrier allocation pattern as downlink resources for sectors in a second service zone, performing one of a first operation and a second operation when a load for a downlink in one of the sectors is greater that a load for a downlink in a neighboring sector; a plurality of mappers for receiving user data to be transmitted for the individual sectors, and mapping the user data to the subcarriers corresponding to the downlink resources allocated for the individual sectors; a plurality of inverse fast Fourier transform (IFFT) blocks for transforming the user data mapped to the individual subcarriers into time-domain user signals; and a plurality of guard interval inserters for inserting a guard interval into each of the time-domain user signals, and transmitting the guard interval-inserted user signals via transmission antennas associated with the individual sectors; wherein the sectors in the first service zone include non-neighboring sectors among the sectors, and the sectors in the second service zone include the remaining sectors, except for the sectors in the first service zone, wherein the first operation comprises releasing downlink resources allocated for the neighboring sector and then reallocating the released downlink resources as downlink resources for the one of the sectors, and the second operation comprises narrowing an antenna beam width forming the one of the sectors and widening an antenna beamwidth forming the neighboring sector. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification