EFFICIENT TRANSMISSION ON A SHARED DATA CHANNEL FOR WIRELESS COMMUNICATION

• US 20070177569A1
• Filed: 10/26/2006
• Published: 08/02/2007
• Est. Priority Date: 10/31/2005
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Lundby, Stein
• Granted Patent: US 8,489,128 B2
• Time in Patent Office: Days
• US Class Current: 370/349
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0017 where the mode-switching is based on Quality of Service requirement
• CPC Class Codes: H04L 1/0025 Transmission of mode-switching indication
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/0032 Without explicit signalling
• CPC Class Codes: H04L 1/0038 Blind format detection for detection of modulation format H04L27/0012
• CPC Class Codes: H04L 1/0072 Error control for data other than payload data, e.g. control data
• CPC Class Codes: H04L 1/0075 Transmission of coding parameters to receiver H04L1/0023 takes precedence
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04L 1/1816 with retransmission of the same, encoded, message
• CPC Class Codes: H04L 1/1819 with retransmission of additional or different redundancy
• CPC Class Codes: H04L 1/1845 Combining techniques, e.g. code combining
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

Techniques for efficient data transmission and reception in a wireless communication system are described. In an aspect, a Node B sends transmissions on a shared data channel to a user equipment (UE) based on at least one parameter assigned to the UE prior to the transmissions. The Node B sends no signaling for the transmissions sent to the UE on the shared data channel. The UE processes the transmissions received from the shared data channel based on the assigned parameter(s). In another aspect, a Node B may send transmissions to a UE in time intervals assigned to the UE. In yet another aspect, a Node B may send transmissions to a UE based on assigned or non-assigned parameters. The Node B sends signaling whenever transmissions are sent with non-assigned parameters. The UE may process a transmission based on parameters obtained from received signaling or the assigned parameters.

Claims

1. A method comprising:

receiving a transmission on a data channel shared by a plurality of user equipments; and

processing the received transmission by a user equipment based on at least one parameter assigned to the user equipment prior to the receiving the transmission.

2. The method of claim 1, the at least one parameter comprising at least one of a channelization code, a transmission format, a block size, a modulation scheme, and a retransmission parameter.

3. The method of claim 1, the at least one parameter comprising a plurality of transmission formats usable for transmissions to the user equipment.

4. The method of claim 1, the processing comprising:

determining if the user equipment is an intended recipient of the received transmission.

5. The method of claim 4, the determining comprising:

checking the received transmission with an identifier for the user equipment.

6. The method of claim 5, the checking comprising:

descrambling a cyclic redundancy check (CRC) for the received transmission with the identifier for the user equipment.

7. The method of claim 4, the determining comprising:

descrambling the received transmission with the identifier for the user equipment.

8. The method of claim 1, the processing comprising:

determining if the received transmission is a new transmission or a retransmission.

9. The method of claim 8, the determining is based on at least one of a decoding result for a prior transmission, an amount of time between the received transmission and a prior transmission, and a number of retransmissions allowed.

10. The method of claim 1, the processing comprising:

processing the received transmission as a new transmission to obtain a decoded packet, and

if the decoded packet is in error, processing the received transmission as a retransmission.

11. The method of claim 1, the processing comprising:

processing the received transmission as a retransmission to obtain a decoded packet, and

if the decoded packet is in error, processing the received transmission as a new transmission.

12. The method of claim 1, the received transmission comprising at least one packet of data.

13. The method of claim 1, the processing is performed without using downlink control information.

14. The method of claim 1, the processing comprising:

decoding the received transmission based on a plurality of transmission formats usable for the received transmission.

15. The method of claim 1, the processing comprising:

despreading the received transmission with a channelization code that is longer than a shortest channelization code for the data channel.

16. The method of claim 1, the receiving comprising:

discontinuously receiving transmissions on the data channel.

17. The method of claim 1, further comprising:

receiving at least one additional transmission on the data channel; and

processing the at least one additional received transmission by the user equipment based on the at least one parameter.

18. The method of claim 1, further comprising:

receiving the at least one parameter during call setup or reconfiguration.

19. A method comprising:

receiving a transmission on a data channel shared by a plurality of user equipments; and

processing the received transmission by a user equipment based on a plurality of transmission formats usable for the received transmission and assigned to the user equipment prior to the receiving the transmission.

20. The method of claim 19, the processing comprising:

selecting one of the plurality of transmission formats,

processing the received transmission based on the selected transmission format,

terminating the processing of the received transmission if the received transmission is decoded correctly, and

repeating the selecting and processing for another one of the plurality of transmission formats if the received transmission is not decoded correctly.

21. The method of claim 19, the plurality of transmission formats comprising at least one of multiple block sizes, multiple code rates, multiple modulation schemes, multiple channelization codes, and multiple time intervals.

22. A user equipment comprising:

a processor to receive a transmission on a data channel shared by a plurality of user equipments, and to process the received transmission based on at least one parameter assigned to the user equipment prior to receiving the transmission; and

a memory coupled to the processor.

23. The user equipment of claim 22, the processor to receive at least one additional transmission on the data channel and to process the at least one additional received transmission based on the at least one parameter.

24. A user equipment comprising:

means for receiving a transmission on a data channel shared by a plurality of user equipments; and

means for processing the received transmission based on at least one parameter assigned to the user equipment prior to receiving the transmission.

25. The user equipment of claim 24, further comprising:

means for receiving at least one additional transmission on the data channel; and

means for processing the at least one additional received transmission based on the at least one parameter.

26. A method comprising:

receiving a plurality of transmissions on a data channel in time intervals assigned to a user equipment; and

processing the plurality of received transmissions based on at least one parameter assigned to the user equipment.

27. The method of claim 26, further comprising:

receiving the time intervals and the at least one parameter assigned to the user equipment during call setup or reconfiguration.

28. A method comprising:

assigning at least one parameter to a user equipment; and

sending a transmission on a data channel shared by a plurality of user equipments for processing by the user equipment based on the at least one assigned parameter.

29. The method of claim 28, the assigning at least one parameter comprising:

assigning a plurality of transmission formats to the user equipment.

30. The method of claim 28, further comprising:

scrambling at least a portion of the transmission with an identifier for the user equipment.

31. The method of claim 28, the sending comprising:

sending the transmission on the data channel in a time interval assigned to the user equipment.

32. The method of claim 28, further comprising:

sending no signaling on a control channel for the transmission on the data channel.

33. A base station in a wireless communication system, comprising:

a processor to assign at least one parameter to a user equipment, to send a transmission on a data channel shared by a plurality of user equipments for processing by the user equipment based on the at least one assigned parameter, and to send no signaling on a control channel for the transmission on the data channel; and

a memory coupled to the processor.

34. The base station of claim 33, the at least one parameter comprising a transmission format, and the processor to specify the transmission format to the user equipment.

35. A method comprising:

receiving a transmission on a data channel shared by a plurality of user equipments in a time interval assigned to a user equipment, the time interval determined based on a pattern of individually selected time intervals usable for data transmission to the user equipment; and

processing the received transmission by the user equipment.

36. The method of claim 35, the individually selected time intervals in the pattern are usable for transmission and retransmission of a packet of data.

37. The method of claim 35, the time interval assigned to the user equipment is assignable to other user equipments.

38. The method of claim 35, the processing comprising:

processing the received transmission based on a plurality of transmission formats usable for the time interval.

39. The method of claim 35, the processing comprising:

determining whether data recovered from the received transmission is intended for the user equipment.

40. The method of claim 35, the processing comprising:

descrambling at least a portion of the received transmission with an identifier for the user equipment.

41. The method of claim 35, the processing comprising:

despreading the received transmission with a channelization code for the assigned time interval.

42. The method of claim 35, further comprising:

monitoring the data channel during time intervals assigned to the user equipment and determined based on the pattern; and

not monitoring the data channel during remaining times.

43. The method of claim 35, wherein a transmission and a retransmission are not sent in different repetitions of the pattern.

44. A method comprising:

receiving a plurality of transmissions on a data channel shared by a plurality of user equipments in a plurality of time intervals assigned to the user equipment, the plurality of time intervals determined based on a pattern of individually selected time intervals; and

processing the plurality of transmissions by the user equipment.

45. A user equipment comprising:

a processor to receive a transmission on a data channel shared by a plurality of user equipments in a time interval assigned to the user equipment and determined based on a pattern of individually selected time intervals usable for data transmission to the user equipment, and to process the received transmission; and

a memory coupled to the processor.

46. A user equipment comprising:

means for receiving a transmission on a data channel shared by a plurality of user equipments in a time interval assigned to the user equipment, the time interval determined based on a pattern of individually selected time intervals usable for data transmission to the user equipment; and

means for processing the received transmission.

47. A method comprising:

assigning at least one time interval to a user equipment; and

sending a transmission during the at least one time interval on a data channel shared by a plurality of user equipments for processing by the user equipment.

48. A base station in a wireless communication system, comprising:

a processor to assign at least one time interval to a user equipment, and to send a transmission during the at least one time interval on a data channel shared by a plurality of user equipments for processing by the user equipment; and

a memory coupled to the processor.

49. A method comprising:

sending to a user equipment a transmission based on at least one parameter selected for the transmission;

sending signaling comprising the at least one selected parameter to the user equipment if the at least one selected parameter is not among at least one parameter assigned to the user equipment; and

sending no signaling for the transmission if the at least one selected parameter is among the at least one assigned parameter.

50. The method of claim 49, further comprising:

using only the at least one assigned parameter for transmissions sent during time intervals assigned to the user equipment.

51. The method of claim 49, further comprising:

selecting at least one parameter for each of a plurality of transmissions sent to the user equipment; and

sending signaling for transmissions sent with parameters not among the at least one assigned parameter.

52. A method comprising:

decoding signaling on a control channel;

processing a transmission based on at least one parameter obtained from the signaling if the signaling is decoded successfully; and

processing the transmission based on at least one parameter assigned to a user equipment if the signaling is not successfully decoded.

53. The method of claim 52, further comprising:

processing the transmission based on at least one different parameter assigned to the user equipment if the transmission is not successfully decoded based on the at least one parameter assigned to the user equipment.

54. The method of claim 52, the processing the transmission based on at least one parameter assigned to the user equipment comprising:

processing the transmission as a new transmission, and

processing the transmission as a retransmission if the transmission is not successfully decoded as a new transmission.

55. The method of claim 52, further comprising:

storing the transmission for future combining if the transmission is not successfully decoded.

56. The method of claim 52, the processing the transmission based on at least one parameter assigned to the user equipment comprising:

combining the transmission with a stored transmission to obtain a combined transmission, and

processing the combined transmission based on the at least one parameter assigned to the user equipment.

57. The method of claim 52, further comprising:

receiving the at least one parameter assigned to the user equipment during call setup or reconfiguration.