Efficient transmission on a shared data channel for wireless communication

• US 8,489,128 B2
• Filed: 10/26/2006
• Issued: 07/16/2013
• Est. Priority Date: 10/31/2005
• Status: Expired due to Fees

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Lundby, Stein A.
• Primary Examiner(s): PATEL, MAHENDRA R
• Application Number:
  US11/553,446
• Publication Number:
  US 20070177569A1
• Time in Patent Office: 2,455 Days
• Field of Search: 370/342, 370/442, 370/335, 370/441, 370/320, 370/328, 370/329, 370/349, 370/236, 445/522, 445/67, 445/450, 445/69, 445/436, 445/466, 445/463, 445/7, 445/464, 375/147, 375/148, 375/346, 375/267
• US Class Current: 455/466
• 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 at a user equipment configured to receive control information over a control channel, at least one parameter assigned to the user equipment;

receiving at the user equipment, in one of a plurality of time intervals assigned to the user equipment, a transmission on a data channel shared by a plurality of user equipments;

processing the received transmission to obtain a decoded packet based on the assigned at least one parameter received by the user equipment prior to receiving the transmission; and

when the decoded packet is in error;

processing the received transmission as a retransmission if the decoded packet was obtained by processing the received transmission as a new transmission; and

processing the received transmission as a new transmission if the decoded packet was obtained by processing the received transmission as a retransmission,

wherein no signaling about the transmission is received by the user equipment over the control channel after the assigned at least one parameter is received by the user equipment.

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.

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.

10. A method comprising:

receiving at a user equipment configured to receive control information over a control channel, at least one parameter assigned to the user equipment;

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

processing the received transmission based on the assigned at least one parameter received by the user equipment prior to receiving the transmission and wherein no signaling about the transmission is received by the user equipment over the control channel after the assigned at least one parameter is received by the user equipment, wherein the processing comprises 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. A method comprising:

receiving at a user equipment configured to receive control information over a control channel, at least one parameter assigned to the user equipment;

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

processing the received transmission based on the assigned at least one parameter received by the user equipment prior to receiving the transmission and wherein no signaling about the transmission is received by the user equipment over the control channel after the assigned at least one parameter is received by the user equipment, wherein the processing comprises 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.

19. A user equipment comprising:

means for receiving at a user equipment configured to receive control information over a control channel, at least one parameter assigned to the user equipment;

means for receiving a transmission, in one of a plurality of time intervals assigned to the user equipment, on a data channel shared by a plurality of user equipments; and

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

wherein no signaling about the transmission is received by the user equipment over the control channel after the assigned at least one parameter is received by the user equipment,

wherein the means for processing the received transmission reprocesses the received transmission as a retransmission if the decoded packet is in error and was obtained by processing the received transmission as a new transmission, and

wherein the means for processing the received transmission reprocesses the received transmission as a new transmission if the decoded packet is in error and was obtained by processing the received transmission as a retransmission.

20. The user equipment of claim 19, 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.

21. A method comprising:

receiving at a user equipment configured to receive control information over a control channel, at least one parameter assigned to the user equipment;

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

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

when the decoded packet is in error;

processing the received transmission as a retransmission if the decoded packet was obtained by processing the received transmission as a new transmission; and

processing the received transmission as a new transmission if the decoded packet was obtained by processing the received transmission as a retransmission,

wherein no signaling about the transmissions are received by the user equipment over the control channel after the assigned at least one parameter is received by the user equipment.

22. The method of claim 21, further comprising:

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

23. A method comprising:

assigning at least one parameter to a user equipment configured to receive control information over a control channel, the at least one parameter comprising a plurality of time intervals corresponding to the 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 wherein no signaling about the transmission is sent over the control channel after the at least one parameter is assigned to the user equipment,

wherein the transmission is processed as both a new transmission and a retransmission if a decoded packet obtained from a first processing of the transmission is in error.

24. The method of claim 23, the assigning at least one parameter comprising:

assigning a plurality of transmission formats to the user equipment.

25. The method of claim 23, further comprising:

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

26. The method of claim 23, the sending comprising:

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

27. The method of claim 23, further comprising:

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

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

a processor configured to;

assign at least one parameter to a user equipment configured to receive control information over a control channel,

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 wherein no signaling is sent on the control channel for the transmission sent on the data channel after the at least one parameter is assigned to the user equipment, and

assign a plurality of time intervals to the user equipment; and

a memory coupled to the processor,

wherein the transmission is processed as both a new transmission and a retransmission if a decoded packet obtained from a first processing of the transmission is in error.

29. The base station of claim 28, the at least one parameter comprising;

a transmission format, and the processor to specify the transmission format to the user equipment.

30. A method comprising:

receiving at a user equipment configured to receive control information over a control channel, at least one time interval assigned to the user equipment;

receiving a transmission on a data channel shared by a plurality of user equipments in one of a plurality of time intervals assigned to the user equipment, wherein the plurality of time intervals is 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 without receiving control information about the transmission over the control channel after the assigned at least one time interval is received by the user equipment,

wherein the user equipment processes the transmission as both a new transmission and a retransmission if a decoded packet obtained from a first processing of the transmission by the user equipment is in error.

31. The method of claim 30, the individually selected time intervals in the pattern are usable for transmission and retransmission of a packet of data.

32. The method of claim 30, the plurality of time intervals assigned to the user equipment is assignable to other user equipments.

33. The method of claim 30, the processing comprising:

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

34. The method of claim 30, the processing comprising:

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

35. The method of claim 30, the processing comprising:

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

36. The method of claim 30, the processing comprising:

despreading the received transmission with a channelization code for the assigned plurality of time intervals.

37. The method of claim 30, 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.

38. The method of claim 30, wherein a transmission and a retransmission are not sent in different repetitions of the pattern.

39. A method comprising:

receiving at a user equipment configured to receive control information over a control channel, a plurality of time intervals assigned to the user equipment;

receiving a plurality of transmissions on a data channel shared by a plurality of user equipments in the plurality of time intervals assigned to the user equipment, the plurality of time intervals determined based on a pattern of individually selected time intervals wherein no control information about the plurality of transmission is received over the control channel after the plurality of time intervals is assigned to the user equipment; and

processing the plurality of transmissions by the user equipment,

wherein the user equipment processes the plurality of transmission as both a new transmission and a retransmission if a decoded packet obtained from a first processing of the plurality of transmissions by the user equipment is in error.

40. A user equipment comprising:

a processor configured to receive a transmission on a data channel shared by a plurality of user equipments in a one of a plurality of time intervals assigned to the user equipment and determined based on a pattern of individually selected time intervals usable for data transmission to the user equipment wherein no control information about the plurality of transmissions is received over the control channel after the plurality of time intervals is assigned to the user equipment and to process the received transmission; and

a memory coupled to the processor,

wherein the processor is further configured to process the transmission as both a new transmission and a retransmission if a first decoded packet obtained from the transmission is in error.

41. A user equipment comprising:

means for receiving at a user equipment configured to receive control information over a control channel, at least one time interval assigned to the user equipment;

means for receiving a transmission 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 usable for data transmission to the user equipment wherein no control information about the plurality of transmission is received over the control channel after the assigned at least one time interval is received by the user equipment; and

means for processing the received transmission,

wherein the means for processing the received transmission processes the transmission as both a new transmission and a retransmission if a first decoded packet obtained from the transmission is in error.

42. A method comprising:

assigning a plurality of time intervals to a user equipment configured to receive control information over a control channel; and

sending a transmission during each of the plurality of time intervals on a data channel shared by a plurality of user equipments for processing by the user equipment wherein no control information about the transmission sent during each of the plurality of time intervals is sent over the control channel after the plurality of time intervals is assigned to the user equipment,

wherein the transmission sent during each of the plurality of time intervals is processed as both a new transmission and a retransmission if a first decoded packet obtained from the transmission sent during each of the plurality of time intervals is in error.

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

a processor to assign a plurality of time intervals to a user equipment, the user equipment configured to receive control information over a control channel, and the processor to send a transmission during each of the plurality of time intervals on a data channel shared by a plurality of user equipments for processing by the user equipment wherein no control information about the transmission is sent over the control channel after the plurality of time intervals is assigned to the user equipment; and

a memory coupled to the processor,

wherein the user equipment processes the transmission sent during each of the plurality of time intervals as both a new transmission and a retransmission if a first decoded packet obtained from the transmission sent during each of the plurality of time intervals is in error.

44. A method comprising:

decoding signaling on a control channel to obtain at least one parameter;

processing a transmission received in one of a plurality of time intervals assigned to a user equipment a first time based on at the least one parameter obtained from the signaling if the signaling is decoded successfully wherein no control information about the transmission is received over the control channel; and

processing the transmission a second time based on at least one parameter assigned to a user equipment if the signaling is not successfully decoded wherein no control information about the transmission is received over the control channel after the signaling is decoded,

wherein the transmission is processed the second time as a retransmission if the transmission is processed the first time as a new transmission, and

wherein the transmission is processed the second time as a new transmission if the transmission is processed the first time as a retransmission.

45. A method comprising:

decoding signaling on a control channel to obtain at least one parameter;

processing a transmission based on the at least one parameter obtained from the signaling if the signaling is decoded successfully wherein no control information about the transmission is received over the control channel;

processing the transmission based on at least one parameter assigned to a user equipment if the signaling is not successfully decoded wherein no control information about the transmission is received over the control channel after the signaling is decoded; and

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.

46. A method comprising:

decoding signaling on a control channel to obtain at least one parameter;

processing a transmission based on the at least one parameter obtained from the signaling if the signaling is decoded successfully wherein no control information about the transmission is received over the control channel; and

processing the transmission based on at least one parameter assigned to a user equipment if the signaling is not successfully decoded wherein no control information about the transmission is received over the control channel after the signaling is decoded, and the processing the transmission based on the at least one parameter assigned to the user equipment comprises 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.

47. A method comprising:

decoding signaling on a control channel to obtain at least one parameter;

processing a transmission based on the at least one parameter obtained from the signaling if the signaling is decoded successfully wherein no control information about the transmission is received over the control channel;

processing the transmission based on at least one parameter assigned to a user equipment if the signaling is not successfully decoded wherein no control information about the transmission is received over the control channel after the signaling is decoded; and

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

48. A method comprising:

decoding signaling on a control channel to obtain at least one parameter;

processing a transmission based on the at least one parameter obtained from the signaling if the signaling is decoded successfully wherein no control information about the transmission is received over the control channel; and

processing the transmission based on at least one parameter assigned to a user equipment if the signaling is not successfully decoded wherein no control information about the transmission is received over the control channel after the signaling is decoded, wherein the processing the transmission based on the at least one parameter assigned to the user equipment comprises;

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.

49. A method comprising:

decoding signaling on a control channel to obtain at least one parameter;

processing a transmission based on the at least one parameter obtained from the signaling if the signaling is decoded successfully wherein no control information about the transmission is received over the control channel;

processing the transmission based on at least one parameter assigned to a user equipment if the signaling is not successfully decoded wherein no control information about the transmission is received over the control channel after the signaling is decoded; and

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

50. A user equipment, comprising:

a processing system configured to;

receive control information over a control channel;

receive at least one parameter assigned to the user equipment;

receive in one of a plurality of time intervals assigned to the user equipment, a transmission on a data channel shared by a plurality of user equipments;

process the received transmission to obtain a decoded packet based on the assigned at least one parameter received prior to receiving the transmission; and

when the decoded packet is in error;

the processing system processes the received transmission as a retransmission if the decoded packet was obtained by processing the received transmission as a new transmission, and

the processing system processes the received transmission as a new transmission if the decoded packet was obtained by processing the received transmission as a retransmission,

wherein the processing system does not receive signaling about the transmission over the control channel after the assigned at least one parameter is received.

51. A computer program product for a user equipment, comprising:

a non-transitory computer-readable medium comprising code for;

receiving control information over a control channel;

receiving at least one parameter assigned to the user equipment;

receiving in one of a plurality of time intervals assigned to the user equipment, a transmission on a data channel shared by a plurality of user equipments;

processing the received transmission to obtain a decoded packet based on the assigned at least one parameter received prior to receiving the transmission; and

when the decoded packet is in error;

the code for processing processes the received transmission as a retransmission if the decoded packet was obtained by processing the received transmission as a new transmission, and

the code for processing processes the received transmission as a new transmission if the decoded packet was obtained by processing the received transmission as a retransmission,

wherein the code for receiving control information does not receive signaling about the transmission over the control channel after the assigned at least one parameter is received.

52. A base station, comprising:

means for assigning at least one parameter to a user equipment configured to receive control information over a control channel, the at least one parameter comprising a plurality of time intervals corresponding to the user equipment; and

means for 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,

wherein no signaling about the transmission is sent over the control channel after the at least one parameter is assigned to the user equipment, and

wherein the transmission is processed as both a new transmission and a retransmission if a decoded packet obtained from a first processing of the transmission is in error.

53. A computer program product of a base station, comprising:

a non-transitory computer-readable medium comprising code for;

assigning at least one parameter to a user equipment configured to receive control information over a control channel, the at least one parameter comprising a plurality of time intervals corresponding to the 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,

wherein no signaling about the transmission is sent over the control channel after the at least one parameter is assigned to the user equipment, and

wherein the transmission is processed as both a new transmission and a retransmission if a decoded packet obtained from a first processing of the transmission is in error.