Selectively multiplexing communication streams

• US 8,929,399 B2
• Filed: 12/25/2012
• Issued: 01/06/2015
• Est. Priority Date: 12/29/2011
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Anchan, Kirankumar, Lin, Yih-Hao, Santhanam, Arvind, Maggenti, Mark A
• Primary Examiner(s): Chery, Dady
• Application Number:
  US13/726,604
• Publication Number:
  US 20130170424A1
• Time in Patent Office: 742 Days
• Field of Search: 370/229, 370/230, 370/235, 370/472, 370/470, 370/464, 370/471, 370/473, 370/474, 370/475
• US Class Current: 370/474
• CPC Class Codes: H04L 65/4061 Push-to services, e.g. push-to-talk or push-to-video
• 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: H04L 69/22 Parsing or analysis of headers
• 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

Abstract

In an embodiment, a network device obtains a plurality of data packets that are each associated with one of a plurality of different streams, wherein each of the plurality of obtained data packets includes a header portion with stream-specific routing information. The network device strips the stream-specific routing information from the plurality of obtained data packets to produce a plurality of stream-specific payload portions, which are merged into a shared payload portion of a stream-multiplexed data packet that includes common routing information for the plurality of streams in a common header portion. The network device transmits the stream-multiplexed packet to a target device, and the target device determines whether any of the plurality of different streams are relevant to the target UE based on stream-mapping information contained in the stream-multiplexed packet, and selectively decodes and processes the stream-specific payload portions corresponding based on the determination.

Claims

1. A method of operating a network device that is configured to multiplex a set of streams into a single output stream for delivery to one or more target devices, comprising:

obtaining a plurality of data packets that are each associated with one of a plurality of different streams, wherein each of the plurality of obtained data packets includes a header portion with stream-specific routing information;

determining that the plurality of obtained data packets are to be delivered to a common target area;

stripping the stream-specific routing information from the plurality of obtained data packets to produce a plurality of stream-specific payload portions;

merging at least the stream-specific payload portions into a shared payload portion of a stream-multiplexed data packet that includes common routing information for the plurality of streams in a common header portion that overrides the stream-specific routing information from the header portions of the plurality of obtained data packets, wherein the stream-multiplexed data packet includes stream-mapping information that maps the stream-specific payload portions in the shared payload portion to the plurality of different streams; and

delivering the stream-multiplexed data packet to a network entity that is configured to handle transmission of the stream-multiplexed data packet within the common target area.

2. The method of claim 1,

wherein the stream-specific routing information for the plurality of obtained data packets correspond to different sets of Internet Protocol/User Datagram Protocol (IP/UDP) addresses, and

wherein the common routing information for the stream-multiplexed data packet uses a single set of IP/UDP addresses.

3. The method of claim 1, further comprising:

determining to transmit the plurality of obtained data packets to one or more target user equipments (UEs) in the common target area via an Internet Protocol (IP) multicasting protocol, and

wherein the delivering delivers the stream-multiplexed data packet to a multicast network management node for IP multicast transmission within the common target area.

4. The method of claim 3, wherein the determination to transmit the plurality of obtained data packets to the one or more target UEs via the IP multicasting protocol is based upon a degree to which the one or more target UEs are geographically collocated within the common target area being at least equal to an IP multicasting threshold.

5. The method of claim 3, wherein the multicast network management node corresponds to a broadcast multicast service center (BM-SC).

6. The method of claim 1, further comprising:

determining to transmit the plurality of obtained data packets to one or more target user equipments (UEs) in the common target area via an Internet Protocol (IP) unicasting protocol, and

wherein the delivering delivers the stream-multiplexed data packet to a unicast network management node for IP unicast transmission within the common target area.

7. The method of claim 6, wherein the determination to transmit the plurality of obtained data packets to the one or more target UEs via the IP unicasting protocol is based upon a degree to which the one or more target UEs are geographically collocated within the common target area being less than an IP multicasting threshold.

8. The method of claim 6, wherein the unicast network management node corresponds to a packet network serving node (PDSN) or packet data network gateway (PGW).

9. The method of claim 6, wherein the one or more target UEs includes a plurality of target UEs.

10. The method of claim 9, wherein two or more of the plurality of target UEs are expected to be interested in different sets of the plurality of different streams.

11. The method of claim 1, wherein the stream-mapping information corresponds to bitmask information that identifies, for each of the stream-specific payload portions in the shared payload portion, the associated stream with payload data in that stream-specific payload portion.

12. The method of claim 1, wherein two or more of the plurality of obtained data packets are targeted to different sets of target UEs.

13. The method of claim 1, further comprising:

transmitting a sync packet to one or more target user equipments (UEs) for the stream-multiplexed data packet,

wherein the sync packet indicates how the stream-mapping information is configured to map the stream-specific payload portions of the shared payload portion to the plurality of different streams.

14. The method of claim 13,

wherein the stream-mapping information corresponds to bitmask information that identifies, for each of the stream-specific payload portions of the shared payload portion, the associated stream with payload data in that stream-specific payload portion, and

wherein the sync packet indicates bitmask identifiers that are configured to be used in the bitmask information for identifying the plurality of different streams.

15. The method of claim 13, wherein the sync packet is retransmitted in response to changes to the stream-mapping information.

16. The method of claim 13, wherein the sync packet is transmitted in response to a given stream being removed from or added to the stream-multiplexed data packet.

17. The method of claim 1, wherein at least one of the plurality of different streams corresponds to a multicast stream.

18. The method of claim 17, wherein each of the plurality of different streams are associated with different evolved multimedia broadcast/multicast services (E-MBMS) services being carried in the common target area.

19. The method of claim 1, wherein at least one of the plurality of different streams corresponds to a unicast stream.

20. The method of claim 19, wherein at least one of the plurality of different streams corresponds to a multicast stream.

21. The method of claim 1, wherein at least one of the plurality of obtained data packets is to be delivered to the common target area and also at least one target area outside of the common target area, further comprising:

delivering the at least one data packet to the at least one target area outside of the common target area based on the at least one data packet'"'"'s stream-specific routing information.

22. The method of claim 1,

wherein the merging further includes merging one or more additional payload portions for one or more other unicast and/or multicast streams being carried in the common target area into the stream-multiplexed data packet.

23. The method of claim 1, wherein the stream mapping information is contained in either (i) the common header portion of the stream-multiplexed data packet, or (ii) the shared payload portion of the stream-multiplexed data packet.

24. The method of claim 23, wherein the stream mapping information is contained the shared payload portion of the stream-multiplexed data packet.

25. The method of claim 24, wherein the shared payload portion includes:

a field that indicates a number of the stream-specific payload portions in the shared payload portion of the stream-multiplexed packet, and

each of the stream-specific payload portions in association with (i) a length field indicating a length of the stream-specific payload portion, and (ii) the stream-specific mapping information for the associated stream.

28. The method of claim 21,

wherein the determining includes:

determining that none of the plurality of different streams are relevant to the target UE based on the stream-mapping information, and

wherein the selectively decoding and processing includes;

refraining from decoding and processing any of the stream-specific payload portions in the stream-multiplexed data packet based on the determination that none of the plurality of different streams are relevant to the target UE.

36. The method of claim 21,

wherein less than all of the plurality of different streams are determined to be relevant to the target UE, and

wherein any non-relevant multicast streams for the target UE are relevant to one or more different target UEs in a common target area that includes both the target UE and the one or more different target UEs.

26. A method of operating a target user equipment (UE) that is configured to monitor one or more streams, comprising:

receiving a stream-multiplexed data packet that includes a shared payload portion that includes stream-specific payload portions that are associated with a plurality of different streams and a common header portion for the plurality of different streams, wherein the stream-multiplexed data packet includes stream-mapping information that maps the stream-specific payload portions of the shared payload portion to the plurality of different streams;

determining whether one or more of the plurality of different streams are relevant to the target UE based on the stream-mapping information; and

selectively decoding and processing the stream-specific payload portions corresponding to the one or more streams based on the determination.

27. The method of claim 26,

wherein the determining includes:

identifying a set of streams from the plurality of different streams that are relevant to the target UE based on the stream-mapping information, and

wherein the selectively decoding and processing includes;

decoding and processing the stream-specific payload portions corresponding to the identified set of streams.

29. The method of claim 26,

wherein the common header portion includes a single set of Internet Protocol/User Datagram Protocol (IP/UDP)/addresses.

30. The method of claim 26, wherein the receiving receives the stream-multiplexed data packet via an Internet Protocol (IP) multicasting protocol from a multicast network management node.

31. The method of claim 30, wherein the target UE is geographically collocated with a number of other target UEs that are each expected to be interested in one or more of the plurality of different streams and which collectively have a degree of geographic collocation that is at least equal to an IP multicasting threshold.

32. The method of claim 30, wherein the multicast network management node corresponds to a broadcast multicast service center (BM-SC).

33. The method of claim 26, wherein the receiving receives the stream-multiplexed data packet via an Internet Protocol (IP) unicasting protocol from a unicast network management node.

34. The method of claim 33, wherein the target UE is geographically collocated with a number of other target UEs that are each expected to be interested in one or more of the plurality of different streams and which collectively have a degree of geographic collocation that is less than an IP multicasting threshold.

35. The method of claim 33, wherein the unicast network management node corresponds to a packet network serving node (PDSN) or packet data network gateway (PGW).

37. The method of claim 26, wherein the stream-mapping information corresponds to bitmask information that identifies, for each of the stream-specific payload portions in the shared payload portion, the associated stream with payload data in that stream-specific payload portion.

38. The method of claim 26, further comprising:

receiving a sync packet for the stream-multiplexed data packet,

wherein the sync packet indicates how the stream-mapping information is configured to map the stream-specific payload portions of the shared payload portion to the plurality of different streams.

39. The method of claim 38,

wherein the stream-mapping information corresponds to bitmask information that identifies, for each of the stream-specific payload portions of the shared payload portion, the associated stream with payload data in that stream-specific payload portion, and

wherein the sync packet indicates bitmask identifiers that are configured to be used in the bitmask information for identifying the plurality of different streams.

40. The method of claim 38, wherein the sync packet is received in response to changes to the stream-mapping information.

41. The method of claim 38, wherein the sync packet is received in response to a given stream being removed from or added to the stream-multiplexed packet.

42. The method of claim 26, wherein at least one of the plurality of different streams corresponds to a multicast stream.

43. The method of claim 42, wherein each of the plurality of different streams are associated with different evolved multimedia broadcast/multicast services (E-MBMS) services being carried in a common target area.

44. The method of claim 26, wherein the stream mapping information is contained in either (i) the common header portion of the stream-multiplexed data packet, or (ii) the shared payload portion of the stream-multiplexed data packet.

45. The method of claim 44, wherein the stream mapping information is contained the shared payload portion of the stream-multiplexed data packet.

46. The method of claim 45, wherein the shared payload portion includes:

a field that indicates a number of the stream-specific payload portions in the shared payload portion of the stream-multiplexed packet, and

each of the stream-specific payload portions in association with (i) a length field indicating a length of the stream-specific payload portion, and (ii) the stream-specific mapping information for the associated stream.

47. The method of claim 26, wherein the selectively decoding and processing includes:

demultiplexing the shared payload portion to extract each of the stream-specific payload portions,

mapping each of the extracted stream-specific payload portions to the plurality of different streams using the stream-mapping information,

identifying at least one of the extracted stream-specific payload portions that is mapped to at least one stream determined to be relevant to the target UE, and

decoding and processing the identified at least one stream-specific payload portion.

48. The method of claim 47,

wherein the determining determines that at least one of the plurality of different streams is relevant to the target UE,

wherein the target UE is provisioned with Internet Protocol/User Datagram Protocol (IP/UDP)/addresses for the at least one relevant stream,

wherein the mapping produces IP/UDP addresses for the plurality of different streams, and

wherein the identified at least one stream-specific payload portion includes any stream-specific payload with IP/UDP addresses that match any of the provisioned IP/UDP addresses.

49. A network device that is configured to multiplex a set of streams into a single output stream for delivery to one or more target devices, comprising:

means for obtaining a plurality of data packets that are each associated with one of a plurality of different streams, wherein each of the plurality of obtained data packets includes a header portion with stream-specific routing information;

means for determining that the plurality of obtained data packets are to be delivered to a common target area;

means for stripping the stream-specific routing information from the plurality of obtained data packets to produce a plurality of stream-specific payload portions;

means for merging at least the stream-specific payload portions into a shared payload portion of a stream-multiplexed data packet that includes common routing information for the plurality of streams in a common header portion that overrides the stream-specific routing information from the header portions of the plurality of obtained data packets, wherein the stream-multiplexed data packet includes stream-mapping information that maps the stream-specific payload portions in the shared payload portion to the plurality of different streams; and

means for delivering the stream-multiplexed data packet to a network entity that is configured to handle transmission of the stream-multiplexed data packet within the common target area.

50. A target user equipment (UE) that is configured to monitor one or more streams, comprising:

means for receiving a stream-multiplexed data packet that includes a shared payload portion that includes stream-specific payload portions that are associated with a plurality of different streams and a common header portion for the plurality of different streams, wherein the stream-multiplexed data packet includes stream-mapping information that maps the stream-specific payload portions of the shared payload portion to the plurality of different streams;

means for determining whether one or more of the plurality of different streams are relevant to the target UE based on the stream-mapping information; and

means for selectively decoding and processing the stream-specific payload portions corresponding to the one or more streams based on the determination.

51. A network device that is configured to multiplex a set of streams into a single output stream for delivery to one or more target devices, comprising:

logic configured to obtain a plurality of data packets that are each associated with one of a plurality of different streams, wherein each of the plurality of obtained data packets includes a header portion with stream-specific routing information;

logic configured to determine that the plurality of obtained data packets are to be delivered to a common target area;

logic configured to strip the stream-specific routing information from the plurality of obtained data packets to produce a plurality of stream-specific payload portions;

logic configured to merge at least the stream-specific payload portions into a shared payload portion of a stream-multiplexed data packet that includes common routing information for the plurality of streams in a common header portion that overrides the stream-specific routing information from the header portions of the plurality of obtained data packets, wherein the stream-multiplexed data packet includes stream-mapping information that maps the stream-specific payload portions in the shared payload portion to the plurality of different streams; and

logic configured to deliver the stream-multiplexed data packet to a network entity that is configured to handle transmission of the stream-multiplexed data packet within the common target area.

52. A target user equipment (UE) that is configured to monitor one or more streams, comprising:

logic configured to receive a stream-multiplexed data packet that includes a shared payload portion that includes stream-specific payload portions that are associated with a plurality of different streams and a common header portion for the plurality of different streams, wherein the stream-multiplexed data packet includes stream-mapping information that maps the stream-specific payload portions of the shared payload portion to the plurality of different streams;

logic configured to determine whether one or more of the plurality of different streams are relevant to the target UE based on the stream-mapping information; and

logic configured to selectively decode and process the stream-specific payload portions corresponding to the one or more streams based on the determination.

53. A non-transitory computer-readable medium containing instructions stored thereon, which, when executed by a network device that is configured to multiplex a set of streams into a single output stream for delivery to one or more target devices, cause the network device to perform operations, the instructions comprising:

at least one instruction for causing the network device to obtain a plurality of data packets that are each associated with one of a plurality of different streams, wherein each of the plurality of obtained data packets includes a header portion with stream-specific routing information;

at least one instruction for causing the network device to determine that the plurality of obtained data packets are to be delivered to a common target area;

at least one instruction for causing the network device to strip the stream-specific routing information from the plurality of obtained data packets to produce a plurality of stream-specific payload portions;

at least one instruction for causing the network device to merge at least the stream-specific payload portions into a shared payload portion of a stream-multiplexed data packet that includes common routing information for the plurality of streams in a common header portion that overrides the stream-specific routing information from the header portions of the plurality of obtained data packets, wherein the stream-multiplexed data packet includes stream-mapping information that maps the stream-specific payload portions in the shared payload portion to the plurality of different streams; and

at least one instruction for causing the network device to deliver the stream-multiplexed data packet to a network entity that is configured to handle transmission of the stream-multiplexed data packet within the common target area.

54. A non-transitory computer-readable medium containing instructions stored thereon, which, when executed by a target user equipment (UE) that is configured to monitor one or more streams, cause the target UE to perform operations, the instructions comprising:

at least one instruction for causing the target UE to receive a stream-multiplexed data packet that includes a shared payload portion that includes stream-specific payload portions that are associated with a plurality of different streams and a common header portion for the plurality of different streams, wherein the stream-multiplexed data packet includes stream-mapping information that maps the stream-specific payload portions of the shared payload portion to the plurality of different streams;

at least one instruction for causing the target UE to determine whether one or more of the plurality of different streams are relevant to the target UE based on the stream-mapping information; and

at least one instruction for causing the target UE to selectively decode and process the stream-specific payload portions corresponding to the one or more streams based on the determination.