Method and system of retransmission

• US 20050002412A1
• Filed: 11/15/2002
• Published: 01/06/2005
• Est. Priority Date: 11/15/2001
• Status: Abandoned Application

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Sagfors, Mats, Ludwig, Reiner, Meyer, Michael, Peisa, Janne
• Application Number:
  US10/495,602
• Publication Number:
  US 20050002412A1
• Time in Patent Office: Days
• US Class Current: 370/437
• CPC Class Codes: H04L 1/16 in which the return channel carries supervisory signals, e.g. repetition request signals
• CPC Class Codes: H04L 1/1809 Selective-repeat protocols
• CPC Class Codes: H04L 1/1858 Transmission or retransmission of more than one copy of acknowledgement message
• CPC Class Codes: H04L 1/1874 Buffer management
• CPC Class Codes: H04L 1/188 Time-out mechanisms
• CPC Class Codes: H04L 41/00 Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
• CPC Class Codes: H04L 47/12 Avoiding congestion; Recovering from congestion
• CPC Class Codes: H04L 69/16 Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
• CPC Class Codes: H04L 69/163 In-band adaptation of TCP data exchange; In-band control procedures
• CPC Class Codes: H04L 69/165 Combined use of TCP and UDP protocols; selection criteria therefor
• CPC Class Codes: H04W 80/06 Transport layer protocols, e.g. TCP [Transport Control Protocol] over wireless transmission control protocol/Internet protocol [TCP/IP] or user datagram protocol [UDP] H04L69/16

Abstract

The present invention relates to a method and system of transmissions and retransmissions of packet data in a communications system, where the communications system uses switched channels, switching between rates or channels of different characteristics, and connection control and management in such a system. Particularly, the invention relates to radio resource management in a Universal Mobile Telecommunications System, UMTS, or WCDMA system allowing for use of compatible protocols for non-switched and switched channels.

Claims

1. A method of retransmission in a communications system, the method characterized in that the communications system uses switched channels, switching between rates or channels of different characteristics, and that data from a data provider is received, positively or negatively acknowledged towards the data provider and transmitted over a switched channel, and that the method allows for use of compatible protocols for non-switched and switched channels.

3. The method according to claim 1 or 2 characterized in that data from the data provider is cached or stored prior to being transmitted over the switched channel.

4. The method according to claim 3 characterized in that prediction on required channel resources of the switched channel is determined from cached or stored data.

5. The method according to claim 3 or 4 characterized in that data is cached or stored in association with radio resource management.

9. The method according to any of claims 1-8 characterized in that radio resource management is provided with prediction data regarding required channel resources of a switched channel.

10. The method according to any of claims 1-9 characterized in that cached or stored data is kept in cache or storage until the transmission over the switched channel has been positively acknowledged, or that a time-out period for a negative acknowledgement has elapsed.

11. The method according to claim 4 or 9 characterized in that prediction is performed for a connection to be established.

12. The method according to claim 4 or 9 characterized in that prediction is performed for an established connection.

13. The method according to any of claims 1-12 characterized in that data is cached or stored in a performance enhancing proxy.

14. The method according to claim 13 characterized in that the performance enhancing proxy provides an interface to radio resource management.

15. The method according to claim 13 or 14 characterized in that the performance enhancing proxy is integrated with a GTP-u tunneling protocol entity.

16. The method according to any of claims 1-12 characterized in that data is cached or stored in a proxy server.

17. The method according to claim 16 characterized in that the proxy server provides an interface to radio resource management.

18. The method according to claim 16 or 17 characterized in that the proxy server is integrated with a GTP-u tunneling protocol entity.

19. The method according to any of claims 1-18 characterized in that at least one of delay and latency, as perceived by a user at the destination, is reduced.

20. The method according to any of claims 1-19 characterized in that at least one of delay and latency, as perceived by a data provider, is reduced.

21. The method according to any of claims 1-20 characterized in that at least one of delay and latency, as perceived by a congestion control algorithm at the data provider, is reduced.

22. The method according to any of claims 1-21 characterized in that utilization of switched channel resources are increased.

23. The method according to any of claims 1-22 characterized in that the differing channel characteristics includes at least one of

data rate,

dedicated or shared usage,

scheduling,

modulation,

spreading code spreading factor, and

transmission power.

24. The method according to any of claims 1-23 characterized in that the switched channel is terminated in a user equipment or a mobile station.

25. The method according to claim 24 characterized in that the switched channel is terminated in a user equipment or a mobile station of a WCDMA system or a Universal Mobile Telecommunications System.

26. The method according to claim 1-25 characterized in that data is cached in a radio network controller or in a network element connected to a radio network controller.

27. The method according to any of claims 1-23 characterized in that the switched channel is terminated in a network element.

28. The method according to claim 26 or 27 characterized in that the network element is a network element of a radio access network.

29. The method according to any of claims 26-28 characterized in that the network element is a Node B, a base station or a radio network controller or is connected to a Node B, a base station or a radio network controller.

30. The method according to any of claims 26-29 characterized in that the network element is a network element of a WCDMA system or UMTS.

31. The method according to any of claims 1-23 and 27-30 characterized in that data is cached in a user equipment or a mobile station.

32. The method according to any of claims 1-23 and 27-30 characterized in that data is cached in an entity connected to a user equipment or a mobile station.

33. The method according to any of claims 1-31 characterized in that the communications system includes a universal mobile telecommunications system or WCDMA system.

34. The method according to any of claims 1-33 characterized in that the communications system includes Internet communications.

66. A radio communications system characterized by means for carrying out the method in any of claims 1-34.

2. A method of retransmission in a communications system, the method characterized in that the communications system uses switched channels, switching between rates or channels of different characteristics, and that data from a data provider is received and, positively or negatively, acknowledged towards the data provider, and forwarded for transmission over a switched channel, and that the method allows for use of one or more protocols developed for non-switched channels for switched channels.

6. A method of retransmission in a communications system, the method characterized in that the communications system uses switched channels, switching between rates or channels of different characteristics, and that data from a data provider is received and, positively or negatively, acknowledged towards the data provider prior to being transmitted over the switched channel and that prediction on required channel resources of a switched channel is determined on the basis of amount of acknowledged data.

7. The method according to claim 6 characterized in that data from the data provider is cached or stored prior to being transmitted over the switched channel.

8. The method according to claim 6 or 7 characterized in that data is cached or stored in association with radio resource management.

35. An element for a communications system using channel switching, switching between rates or channels of different characteristics, the element characterized by a data receiver acknowledging, positively or negatively, received data to be transmitted over a switched channel, the element allowing for use of compatible protocols for non-switched and switched channels.

37. The element according to claim 35 or 36 characterized by data storage means for caching or storing of data prior to its transmission over the switched channel.

38. The element according to claim 35 or 36 characterized by data memory means for caching or storing of data prior to its transmission over the switched channel.

39. The element according to claim 37 or 38 characterized by means for communicating prediction data, based on stored or cached data, to an element responsible for radio resource management.

44. The element according to any of claims 35-43 characterized by an acknowledgement receiver, connected to data storage or memory means.

45. The element according to any of claims 35-44 characterized in that the element keeps cached or stored data in cache or storage until the transmission of data over the switched channel has been positively acknowledged, or that a time-out period for a negative acknowledgement has elapsed.

46. The element according to any of claims 35-45 characterized by means for providing radio resource management with prediction data regarding required channel resources of a switched channel.

47. The element according to claim 39 or 46 characterized in that the prediction data concerns a connection to be established.

48. The element according to claim 39 or 46 characterized in that the prediction data concerns an established connection.

49. The element according to any of claims 35-48 characterized in that the element is a performance enhancing proxy.

50. The element according to any of claims 35-48 characterized in that the element is a proxy server.

51. The element according to any of claims 35-50 characterized in that the element reduces at least one of delay and latency, as perceived by a user at the destination.

52. The element according to any of claims 35-51 characterized in that the element reduces at least one of delay and latency, as perceived by a data provider.

53. The element according to any of claims 35-52 characterized in that the element is a network element for reducing at least one of delay and latency, as perceived by a congestion control algorithm at a data provider.

54. The element according to any of claims 35-53 characterized in that it is an element for increasing utilization of switched channel resources.

55. The element according to any of claims 35-54 characterized in that the element provides an interface to radio resource management.

56. The element according to any of claims 35-55 characterized in that the differing channel characteristics includes at least one of

data rate,

dedicated or shared usage,

scheduling,

modulation,

spreading code spreading factor, and

transmission power.

57. The element according to claim 39 characterized in that the prediction data concerns a connection to a user equipment.

58. The element according to claim 39 characterized in that the prediction data concerns a connection to a user equipment of a WCDMA system or a Universal Mobile Telecommunications System.

59. The element according to any of claims 35-58 characterized in that the element is a radio network controller or is connected to a radio network controller.

60. The element according to any of claims 35-59 characterized in that the element is integrated with a GTP-u tunneling protocol entity.

61. The element according to claim 39 characterized in that the prediction data concerns a connection to a radio access network.

62. The element according to claim 61 characterized in that the radio access network is a universal terrestrial radio access network of a WCDMA system or a Universal Mobile Telecommunications System.

63. The element according to any of claims 35-56, 61 and 62 characterized in that the element is a user equipment or is connected to a user equipment.

64. The element according to any of claims 35-63 characterized in that it is an element of a universal mobile telecommunications system or WCDMA system.

65. The element according to any of claims 35-64 characterized in that the element receives data from the Internet.

67. A radio communications system characterized by a plurality of elements according to any of claims 35-65.

36. An element for a communications system using channel switching, switching between rates or channels of different characteristics, the element characterized by a data receiver acknowledging positively or negatively received data and forwarding the data for transmission over a switched channel, the element allowing for use of one or more protocols developed for non-switched channels for switched channels.

40. An element for a communications system using channel switching, switching between rates or channels of different characteristics, the element characterized by a data receiver acknowledging, positively or negatively, received data prior to transmission of the data over a switched channel, and means for communicating prediction data on channel resources of the switched channel, based on amount of acknowledged data.

41. The element according to claim 40 characterized by data storage means for caching or storing of data prior to its transmission over the switched channel.

42. The element according to claim 40 characterized by data memory means for caching or storing of data prior to its transmission over the switched channel.

43. The element according to any of claims 40-42 characterized by means for communicating prediction data to an element responsible for radio resource management.