METHOD FOR DECIDING RADIO BEARER OF MOBILE IPTV SYSTEM

• US 20110154421A1
• Filed: 08/16/2010
• Published: 06/23/2011
• Est. Priority Date: 12/21/2009
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Chun, Sun Sim
• Granted Patent: US 8,413,201 B2
• Time in Patent Office: Days
• US Class Current: 725/109
• CPC Class Codes: H04L 65/611 for multicast or broadcast systems for broadcast or conference H04L12/18; arrangements for broadcast or distribution combined with broadcast H04H20/00; arrangements for broadcast applications with a direct linkage to broadcast information or to broadcast space-time H04H60/00; selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS], H04W4/06
• CPC Class Codes: H04N 21/2385 Channel allocation H04N21/266 takes precedence; Bandwidth allocation H04N21/24 takes precedence ; allocation of channels according to the instantaneous demands of the users in time-division multiplex systems H04J3/1682; admission control, resource allocation in open networks H04L12/5692; arrangements for maintenance or administration in data switching networks involving bandwidth and capacity management H04L41/0896; negotiating bandwidth in wireless networks H04W28/16
• CPC Class Codes: H04N 21/2402 Monitoring of the downstream path of the transmission network, e.g. bandwidth available traffic monitoring in data switching networks H04L43/00; monitoring data switching networks utilization H04L43/0876
• CPC Class Codes: H04N 21/25808 Management of client data terminal profiles in network data switching protocols H04L67/303
• CPC Class Codes: H04N 21/6338 directed to network
• CPC Class Codes: H04N 21/6405 Multicasting data broadcast and multicast in packet switching networks H04L12/18
• CPC Class Codes: H04N 21/6408 Unicasting

Abstract

In a mobile IPTV system, a multicast coordination entity (MCE) acquires information for radio resource allocation for satisfying all terminals through a counting procedure, and determines a radio bearer by considering a share of usage anticipation subcarrier for respective identifiers of contents. A scheduling subject is variable by a characteristic of the determined radio bearer.

Claims

1. A method for a multicast coordination entity (MCE) to determine a radio bearer in a mobile IPTV system for transmitting the same contents to a plurality of terminals, comprising:

receiving identifiers of contents selected by the terminals and radio channel information from the terminals; and

determining the radio bearer by considering a share of a usage anticipation subcarrier for each identifier of the contents.

2. The method of claim 1, wherein the determining includes,

determining one of a unicast transmission method of a point-to-point radio bearer and a multicast transmission method of a point-to-multipoint radio bearer according to a share of the usage anticipation subcarrier.

3. The method of claim 2, further comprising:

when it is determined to be the multicast transmission method of the point-to-multipoint radio bearer, allocating a physical resource of a transport channel used for the multicast transmission method of the point-to-multipoint radio bearer by using the radio channel information.

4. The method of claim 2, further comprising:

when it is determined to be the unicast transmission method of the point-to-point radio bearer, transmitting the radio channel information to a base station wirelessly communicating with the terminals,

wherein a physical resource of a transport channel used for the unicast transmission method of the point-to-point radio bearer is allocated based on the radio channel information of the base station.

5. The method of claim 3, wherein

the radio channel information includes N pieces of sub-band information in the worst channel state and signal to interference and noise ratio (SINR) information on subcarriers other than the N pieces of sub-band information, and

N is a positive integer.

6. The method of claim 5, wherein

the radio resource is allocated by considering the SINR of the subcarriers other than the N pieces of sub-band information from among available subcarriers.

7. The method of claim 1, wherein

the determining includes determining the radio bearer in the order of identifiers of the contents with a lesser number of terminals.

8. The method of claim 1, wherein

the determining includes:

finding the share of usage anticipation subcarriers for respective identifiers of the contents;

when the share of the usage anticipation subcarrier is less than a reference value, determining a unicast transmission method of a point-to-point radio bearer; and

when the share of the usage anticipation subcarrier is greater than the reference value, determining a multicast transmission method of a point-to-multipoint radio bearer,

wherein the reference value is set by a usage share of the current subcarrier and a share of the subcarrier influenced by neighboring cells.

9. The method of claim 8, wherein

the finding of the share includes

finding the share of the usage anticipation subcarrier by dividing the product of the subcarrier occupied by the contents and a number of terminals desiring the contents by the entire subcarriers.

10. A method for a multicast coordination entity (MCE) to determine a radio bearer in a mobile IPTV system for transmitting the same contents to a plurality of terminals, comprising:

receiving identifiers of contents selected by the terminals from the terminals;

finding a share of usage anticipation subcarriers for respective identifiers of the contents;

determining it to be a point-to-point radio bearer when the share of the usage anticipation subcarrier is less than a reference value; and

determining it to be a point-to-multipoint radio bearer when the share of the usage anticipation subcarrier is greater than the reference value.

11. The method of claim 10, further comprising:

receiving radio channel information from the terminals; and

allocating a radio resource of the point-to-multipoint radio bearer by using the radio channel information when it is determined to be the point-to-multipoint radio bearer.

12. The method of claim 10, further comprising:

receiving radio channel information from the terminals; and

transmitting the radio channel information to a base station wirelessly communicating with the terminals when it is determined to be the point-to-point radio bearer,

wherein the base station allocates the radio resource of the point-to-point radio bearer by using the radio channel information.

13. The method of claim 11, wherein

the radio channel information includes at least one piece of sub-band information in the worst channel state and signal to interference and noise ratio (SINR) information on subcarriers other than the at least one piece of sub-band information.

14. The method of claim 10, wherein

the point-to-point radio bearer or the point-to-multipoint radio bearer is selected starting from the identifier of the contents with a lesser number of terminals.

15. The method of claim 10, wherein

the reference value is determined by a usage share of the current subcarrier and a share of the subcarrier influenced by neighboring cells.

16. The method of claim 10, wherein

the share of the usage anticipation subcarrier is determined by a number of subcarriers occupied by the contents and a number of terminals having selected the contents.

17. A method for a multicast coordination entity (MCE) to determine a radio bearer in a mobile IPTV system for transmitting the same contents to a plurality of terminals, comprising:

receiving identifiers of contents selected by the terminals from the terminals;

calculating a number of terminals for respective identifiers of the contents; and

determining a radio bearer by considering a share of usage anticipation subcarriers of the contents starting from an identifier of contents with a lesser number of terminals.

18. The method of claim 17, wherein

the share of the usage anticipation subcarrier is determined by a number of subcarriers occupied by the contents and a number of terminals having selected the contents.

19. The method of claim 18, wherein

the determining includes:

when the share of the usage anticipation subcarrier is less than a reference value, selecting a unicast transmission method of a point-to-point radio bearer; and

when the share of the usage anticipation subcarrier is greater than the reference value, selecting a multicast transmission method of a point-to-multipoint radio bearer,

wherein the reference value is set by a usage share of the current subcarrier and a share of the subcarrier influenced by neighboring cells.

20. The method of claim 18, further comprising:

receiving radio channel information from the terminals,

wherein a physical resource of the radio bearer selected by using the radio channel information is allocated.