SYSTEM AND METHOD FOR DETECTING STATIONARY USERS AND CALL ADMISSION CONTROL METHOD THEREOF IN WIRELESS COMMUNICATION SYSTEM

• US 20100227619A1
• Filed: 08/21/2008
• Published: 09/09/2010
• Est. Priority Date: 11/01/2007
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Park, Nam Hoon, Lee, Seung-Que
• Granted Patent: US 8,295,847 B2
• Time in Patent Office: Days
• US Class Current: 455/438
• CPC Class Codes: H04L 47/70 Admission control; Resource allocation
• CPC Class Codes: H04L 47/745 Reaction in network
• CPC Class Codes: H04L 47/765 triggered by the end-points
• CPC Class Codes: H04L 47/824 Applicable to portable or mobile terminals
• CPC Class Codes: H04W 64/003 locating network equipment
• CPC Class Codes: H04W 64/006 with additional information processing, e.g. for direction or speed determination
• CPC Class Codes: H04W 8/18 Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data

Abstract

The present invention relates to a stationary user detecting system and method and a call admission control method using the same in a wireless communication system. A plurality of base stations located in the wireless Internet system detect a stationary user at regular time intervals and maintain it by a predetermined number of cases for each terminal. Information on the maintained stationary user is recalculated with a stationary probability for each base station so as to be used for call admission control. Therefore, the terminal of the stationary user detected in the wireless Internet system is calculated with the stationary probability value, which is applied to the call admission control, thereby minimizing reservation of undesired resources.

Claims

1. A method for detecting a stationary user in a wireless communication system, the method comprising:

establishing a stationary user set included in a first base station with reference to a predefined time;

detecting whether a first terminal is a stationary user terminal based on information on the established stationary user set and a predefined window index; and

calculating a first stationary probability for the first terminal detected as the stationary user terminal.

2. The method of claim 1, wherein

the establishing of a stationary user set includes

establishing the stationary user set by using identification information corresponding to at least one terminal included in common in a region of the first base station and a region of at least one second base station neighboring the first base station.

3. The method of claim 1, wherein

the detecting includes

detecting by checking whether the first terminal is included in a list of the stationary user set up to a time corresponding to an index having the maximum value from among the predefined window index, the stationary user set being established by the number of cases of the window index.

4. The method of claim 3, wherein

the calculating of a first stationary probability includes

calculating how many times the first terminal is included in the list of the stationary user set established by the number of cases of the window index.

5. The method of claim 2, wherein the method further includes

calculating a second stationary probability based on the calculated first stationary probability, and

the calculating of a second stationary probability includes:

establishing a size of a resource required by the terminal with a weight, the terminal being at least one terminal in an active user cell of the first base station; and

summing the established weights, and calculating the summed value for each first base station to find the second stationary probability.

6. The method of claim 5, wherein

the second stationary probability is recalculated each time the first stationary probability calculated for the stationary user terminal is changed.

7. A call admission control method comprising:

receiving a new call request from a terminal;

determining whether to allocate a first resource to the requested terminal, the first resource being an available resource to be allocated to the terminal by a base station;

determining whether to allocate a second resource to the terminal by using a stationary probability for each base station when failing to allocate the first resource to the terminal, the second resource being a resource reserved for a handover call by the base station; and

allocating the second resource to the terminal and admitting a new call allocation requested by the terminal when the second resource can be allocated to the terminal.

8. The method of claim 7, wherein

the determining of whether to allocate the second resource includes

allocating the first resource to the terminal and admitting the new call allocation requested by the terminal when the first resource can be allocated to the terminal.

9. The method of claim 7, wherein the method includes

rejecting the new call allocation requested by the terminal when the second resource cannot be allocated to the terminal.

10. A stationary user detecting system in a wireless communication system, comprising:

a stationary user set establisher for receiving identifier information on a plurality of terminals included in a first base station region and at least one second base station region neighboring the first base station, and establishing a stationary user set by using identification information on at least one terminal included in common in the first base station region and the second base station region;

a stationary user detector for detecting whether a specific terminal is a stationary user in the base station connected to the specific terminal based on stationary user set information established by the stationary user set establisher and a predefined window index; and

a stationary probability calculator for calculating a degree of the specific terminal that is detected as a stationary user by the stationary user detector with a stationary probability, the degree being included in the stationary user during a period established by the window index.

11. The stationary user detecting system of claim 10, wherein

the stationary probability calculator includes:

a first module for calculating the degree included in the stationary user during the established period with a stationary probability by the specific terminal; and

a second module for establishing sizes of the resources requested by a plurality of terminals with weights and calculating a stationary probability for each first base station based on the stationary probability calculated by the first module.