Method and apparatus for distributing load in wireless communication system

摘要

A method and an apparatus for distributing a load of a base station in a wireless communication system supporting multi-carriers are provided. In the method, carriers are classified into a plurality of groups. A load of each of a plurality of cells corresponding to the plurality of groups, is determined. A cell load of each of the plurality of cells is compared with at least one threshold set in advance. When a cell load of a first cell has a value greater than the at least one threshold set in advance, a cell inside a group of the first cell or a cell inside a group different from the first cell is selected depending on the cell load of the first cell. A terminal of the first cell is allowed to perform a handover to the selected cell.

主权项

1. A method for distributing a load of a base station in a wireless communication system supporting multi-carriers, the method comprising:
classifying a plurality of carriers into a plurality of groups; determining a load of each of a plurality of cells corresponding to the plurality of carriers; determining a source cell requiring a load distribution among the plurality of cells, based on the determined load of each cell; comparing a load of the source cell with a plurality of thresholds; determining at least one target group from among a plurality of groups, based on the comparing result; determining at least one target cell from among a plurality of cells of the determined at least one target group, based on the comparing result; and distributing the load of the source cell to the at least one target cell, wherein the plurality of thresholds comprises a first threshold, a second threshold, and a third threshold, wherein the first threshold is used for determining whether to select at least one target cell from co-located cells among all cells inside a group to which a carrier of the source cell belongs, wherein the second threshold is used for determining whether to select at least one target cell among the all cells inside the group to which the carrier of the source cell belongs, wherein the third threshold is used for determining whether to select at least one target cell among cells inside a different group to which the carrier of the source cell does not belongs, wherein the load is calculated using at least one of an air resource not in use, an air resource allocatable to a user equipment (UE) which indicates an amount of the air resource, if available air resources for non-guaranteed bit rate (non-GBR) services are equally allocated to future UEs and existing UEs, a number of connected UEs, a maximum number of allowable connected UEs per cell, a hardware load, a backhaul average unused amount, a backhaul average use amount for non-GBR services, and a backhaul available amount for the non-GBR services, and wherein the future UEs are UEs which will newly enter a cell.