US 9,794,847 B2Granted

Central control device and load balancing method thereof

AssigneeInstitute for Information Industry

InventorsChih-Hsiang Ho, Li-Sheng Chen, Wei-Ho Chung, Sy-Yen Kuo

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Abstract

A central control device and a load balancing method thereof are provided. The central control device includes a network interface, a storage and a processor. The network interface is connected to a plurality of base stations and receives a load parameter from each base station. The storage stores the load parameters. The processor is electrically connected to the storage and the network interface. For each base station, the processor calculates a load indication according to the load parameter thereof to determine whether the base station is an overloaded base station based on the load indication, and calculates an offload priority indication according to the load indication, a quantity of off-loadable resources of at least one neighboring base station, a first weighting factor and a second weighting factor. The processor determines an offload order of the overloaded base stations according to the offload priority indications.

Claims18

Dependent claims

A central control device, comprising:

a network interface connected to a plurality of base stations;
a storage;
and
a processor electrically connected to the storage and the network interface, being configured to execute the following operations:
(a) receiving a load parameter from each of the base stations via the network interface and storing the load parameters into the storage;
(b) calculating a load indication of each of the base stations according to the load parameter of each of the base stations, and calculating a network load balancing indication according to a total number of the base stations and the load indications;
(c) determining that the base station, the load indication of which exceeds an allowable load range, is an overloaded base station;
(d) determining whether the network load balancing indication exceeds an allowable balancing range when the base stations comprise a plurality of overloaded base stations;
(e) calculating an offload priority indication for each of the overloaded base stations according to the load indication, a quantity of offloadable resource of at least one neighboring base station, a first weighting factor and a second weighting factor when the network load balancing indication exceeds the allowable balancing range;
and
(f) determining an offload order of the overloaded base stations according to the offload priority indications.

8 more elements

A load balancing method for use in a central control device, the central control device comprising a network interface, a storage and a processor, the network interface being connected to a plurality of base stations, the processor being electrically connected to the storage and the network interface, and the load balancing method being executed by the processor, the method comprising:

(a) receiving a load parameter from each of the base stations via the network interface and storing the load parameters into the storage;
(b) calculating a load indication of each of the base stations according to the load parameter of each of the base stations, and calculating a network load balancing indication according to a total number of the base stations and the load indications;
(c) determining that the base station, the load indication of which exceeds an allowable load range, is an overloaded base station;
(d) determining whether the network load balancing indication exceeds an allowable balancing range when the base stations comprise a plurality of overloaded base stations;
(e) calculating an offload priority indication for each of the overloaded base stations according to the load indication, a quantity of offloadable resource of at least one neighboring base station, a first weighting factor and a second weighting factor when the network load balancing indication exceeds the allowable balancing range;
and
(f) determining an offload order of the overloaded base stations according to the offload priority indications.

4 more elements

Dependencies are inferred from the claim text.