Method and system for a multicast service initiation in a communication system

• US 8,243,644 B2
• Filed: 04/01/2005
• Issued: 08/14/2012
• Est. Priority Date: 07/09/2002
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Sinnarajah, Ragulan, Wang, Jun, Leung, Nikolai K. N., Chen, Tao
• Primary Examiner(s): Yao, Kwang B
• Assistant Examiner(s): NGUYEN, ANH NGOC M
• Application Number:
  US11/097,594
• Publication Number:
  US 20050169203A1
• Time in Patent Office: 2,692 Days
• Field of Search: 370/312, 370/390, 370/389, 370/432, 370/474, 370/349, 370/471, 370/310, 370/229, 370/230, 370/252, 370/328, 370/310.2, 370/338
• US Class Current: 370/312
• CPC Class Codes: H04W 4/06 Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
• CPC Class Codes: H04W 72/30 Resource management for broadcast services

Abstract

Method and a system for multicast service notification in cellular telephone system to enable the cellular telephone systems to provide both multicast and point-to-point services are disclosed. Several embodiments describe the signaling interaction between an access network and subscriber stations belonging to a multicast group to allow the access network to properly notify the subscriber stations of a the multicast service. Such a signaling further allows the subscriber stations to recognize the multicast service notification to participate in the multicast service.

Claims

1. A method for a multicast service notification in a communication system, comprising:

determining a multicast group identifier that identifies a group of mobile stations subscribed to a particular multicast content; and

periodically transmitting a message on a first wireless channel with a transmitter, the periodically transmitted message corresponding to an overhead message that is transmitted at a given periodic interval;

determining that data associated with the multicast content subscribed to by the group of mobile stations is available; and

wherein, responsive to the determination that the data associated with the multicast content subscribed to by the group of mobile stations is available, the periodically transmitting step configures the next periodically transmitted message to include the multicast group identifier.

2. The method as claimed in claim 1, wherein said determining a multicast group identifier comprises:

receiving the multicast group identifier from an entity of the communication system.

3. The method as claimed in claim 1, wherein said determining a multicast group identifier comprises:

receiving an identity of mobile stations belonging to a multicast group; and

determining the multicast group identifier in accordance with the identity of the mobile stations.

4. The method as claimed in claim 1, further comprising:

receiving an end indicator for a multicast service for mobile stations identified by the multicast group identifier; and

removing the multicast group identifier from the periodically transmitted message on the first wireless channel if the multicast group identifier is included in every periodically transmitted message.

5. The method as claimed in claim 1, further comprising:

receiving an end indicator for a multicast service for mobile stations identified by the multicast group identifier; and

including the end indicator into a signal conveyed over a second wireless channel, if the multicast group identifier is not included in every periodically transmitted message.

6. The method as claimed in claim 5, wherein said including the end indicator into the signal conveyed over the second wireless channel comprises:

including the end indicator into the signal conveyed over the second wireless channel conveying the multicast service.

15. The method of claim 1, wherein the periodically transmitted message is transmitted at each given interval irrespective of whether data associated with the multicast content subscribed to by the group of mobile stations is available.

19. The method of claim 1, wherein each periodically transmitted message is transmitted irrespective of whether data associated with the particular multicast content is available.

20. The method of claim 1, wherein the multicast group identifier is known to each mobile station among the group of mobile stations, and wherein said each mobile station recognizes that data for the group of mobile stations is available based on the inclusion of the multicast group identifier.

21. The method of claim 1,

wherein the next periodically transmitted message includes channel assignment information assigning a downlink channel, and

wherein the mobile stations can receive the data associated with the multicast content on the assigned downlink channel without responding to the next periodically transmitted message.

22. The method of claim 21, wherein the assigned downlink channel corresponds to a shared channel that is shared by two or more of the mobile stations among the group of mobile stations.

23. The method of claim 1, wherein the mobile stations are required to respond to the next periodically transmitted message before the mobile stations are assigned a downlink channel for the multicast content.

24. The method of claim 23, wherein the downlink channel corresponds to a dedicated channel, with each responding mobile station being assigned its own separate dedicated channel.

25. The method of claim 24, wherein a single message is used to assign separate dedicated channels to two or more of the responding mobile stations.

26. The method of claim 1, wherein a network communication entity performs the periodically transmitting without knowledge of which mobile stations belong to the group of mobile stations.

27. The method of claim 26, further comprising:

receiving one or more responses to the periodically transmitted message from one or more mobile stations of the group of mobile stations;

determining that the mobile stations sending the one or more responses to the periodically transmitted message belong to the group of mobile stations.

28. The method of claim 1, wherein the periodically transmitted message corresponds to an individual page message that is configured to page one particular mobile station of the group of mobile stations.

31. The method of claim 1, wherein the periodically transmitted message advertises each currently active multicast session in a given serving area of the communication system.

32. The method of claim 1, wherein the multicast content associated with the currently active multicast sessions is conveyed separately from the periodically transmitted message.

7. An apparatus for a multicast service notification in a communication system, comprising:

a processor; and

a non-transitory storage medium coupled to the processor and containing a set of instructions executable by the processor to;

determine a multicast group identifier that identifies a group of mobile stations subscribed to a particular multicast content; and

periodically transmit a message on a first wireless channel with a transmitter, the periodically transmitted message corresponding to an overhead message that is transmitted at a given periodic interval;

determine that data associated with the multicast content subscribed to by the group of mobile stations is available; and

wherein, responsive to the determination that the data associated with the multicast content subscribed to by the group of mobile stations is available, the processor configures the next periodically transmitted message to include the multicast group identifier.

8. The apparatus as claimed in claim 7, wherein said processor determines a multicast group identifier by processing a set of instructions to:

receive the multicast group identifier from an entity of the communication system.

9. The apparatus as claimed in claim 7, wherein said processor determines a multicast group identifier by processing a set of instructions to:

receive an identity of mobile stations belonging to a multicast group; and

determine the multicast group identifier in accordance with the identity of the mobile stations.

10. The apparatus as claimed in claim 7, wherein said processor is further configured to:

receive an end indicator for a multicast service for mobile stations identified by the multicast group identifier; and

remove the multicast group identifier from the periodically transmitted message on the first wireless channel if the multicast group identifier is included in every periodically transmitted message.

11. The apparatus as claimed in claim 7, wherein said processor is further configured to:

receive an end indicator for a multicast service for mobile stations identified by the multicast group identifier; and

include the end indicator into a signal conveyed over a second wireless channel, if the multicast group identifier is not included in every periodically transmitted message.

12. The apparatus as claimed in claim 11, wherein said processor includes the end indicator into the signal conveyed over the second wireless channel by processing a set of instructions to:

include the end indicator into the signal conveyed over the second wireless channel conveying the multicast service.

13. The apparatus as claimed in claim 7, wherein said processor and said storage medium are disposed in a base station.

14. The apparatus as claimed in claim 13, wherein the multicast group identifier is received from an entity of the communication system different from the base station.

16. The apparatus of claim 7, wherein the periodically transmitted message is transmitted at each given interval irrespective of whether data associated with the multicast content subscribed to by the group of mobile stations is available.

17. An apparatus, comprising:

means for determining a multicast group identifier that identifies a group of mobile stations subscribed to a particular multicast content; and

means for periodically transmitting a message on a first wireless channel, the periodically transmitted message corresponding to an overhead message that is transmitted at a given periodic interval;

means for determining that data associated with the multicast content subscribed to by the group of mobile stations is available; and

wherein, responsive to the determination that the data associated with the multicast content subscribed to by the group of mobile stations is available, the means for periodically transmitting configures the next periodically transmitted message to include the multicast group identifier.

18. A non-transitory computer-readable medium comprising instructions, which, when executed by an apparatus, cause the apparatus to perform operations, the instructions comprising:

program code to determine a multicast group identifier that identifies a group of mobile stations subscribed to a particular multicast content; and

program code to periodically transmit a message on a first wireless channel, the periodically transmitted message corresponding to an overhead message that is transmitted at a given periodic interval;

program code to determine that data associated with the multicast content subscribed to by the group of mobile stations is available; and

wherein, responsive to the determination that the data associated with the multicast content subscribed to by the group of mobile stations is available, the program code to periodically transmit configures the next periodically transmitted message to include the multicast group identifier.

29. A method for a multicast service notification in a communication system, comprising:

determining a multicast group identifier that identifies a group of mobile stations subscribed to a particular multicast content; and

periodically transmitting a message on a first wireless channel with a transmitter, the periodically transmitted message corresponding to an overhead message that is transmitted at a given periodic interval;

determining that data associated with the multicast content subscribed to by the group of mobile stations is available,

wherein, responsive to the determination that the data associated with the multicast content subscribed to by the group of mobile stations is available, the periodically transmitting step configures a subsequent periodically transmitted message to include the multicast group identifier.

30. The method of claim 29, wherein the subsequent periodically transmitted message corresponds to the next periodically transmitted message that is transmitted subsequent to the determination.