Abstract
The present invention is related to a method and system for sending and reducing uplink feedback signaling by a wireless transmit/receive unit (WTRU) related to transmission of multimedia broadcast multi cast service (MBMS) data over a high speed down link packet access (HSDPA) channel. A Node B may pre-allocate a time frequency region or a common channelization code for the feedback. A triggering criterion for reporting a channel quality indicator (CQI) is set and WTRUs send a CQI to a Node B only if the triggering criterion is satisfied. The triggering criterion may be a current operating CQI value at the Node B or based on erroneous transport block reception statistics or a predetermined time period. A feedback reduction method related to ACK/NACK includes the WTRU sending an indication of an average number of transmissions needed to successfully decode the data instead of sending an ACK/NACK for every transmission interval.
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| Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | |||||
|---|---|---|---|---|---|---|---|---|---|
| Declaration Date | Declaration Reference | Declaring Company | Specification Number | ||||||
| 3G | 18/09/2008 | ISLD-200901-001 | INTERDIGITAL INC |
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| 4G | 14/12/2021 | ISLD-202112-078 | INTERDIGITAL INC |
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|---|---|---|---|---|---|---|---|---|---|---|
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| US2008045228A1 | 3G | 18/09/2008 | ISLD-200901-001 | INTERDIGITAL INC |
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Yes | Basis Patent | |||
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| Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | Status | National Phase Entries | |||||
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| Declaration Date | Declaration Reference | Declaring Company | Specification Information | |||||||||
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Technologies
Resource configuration Broadcast/Multicast Random access
Product
User Equipment (UE/Terminal)
Use Cases
Wireless communication
Services
Transmitting/receiving data in uplink
Claim
1. In a wireless transmit receive unit (WTRU) that communicates with a wireless communication system, a method comprising: sending in a random access channel (RACH) preamble, a request for an uplink shared channel allocation; receiving the uplink shared channel allocation; sending a multimedia broadcast multicast service (MBMS) feedback transmission on the shared uplink channel.
2. The method of claim 1, wherein the WTRU uses a synchronized RACH preamble.
3. The method as in claim 2 wherein the WTRU is in an LTE_Active state.
4. The method of claim 1, wherein the WTRU uses a non- synchronized RACH preamble.
5. The method as in claim 4 wherein the WTRU is in an LTE_Active state or an LTE-IdIe state.
6. The method as in claim 1, further comprising the WTRU sending a message with an indication that the cause for random access to the RACH is feedback for MBMS.
7. In a wireless transmit receive unit (WTRU) that communicates with a wireless communication system, a method comprising: sending in a random access channel (RACH) preamble, an indication that the cause for random access to the RACH is feedback for MBMS; sending a multimedia broadcast multicast service (MBMS) feedback transmission on the RACH.
8. The method as in claim 7, wherein the RACH used by the WTRU is a synchronized RACH.
9. The method as in claim 7, wherein the RACH used by the WTRU is a non-synchronized RACH
10. The method as in claim 7, wherein the MBMS feedback transmission is sent within a message/control bits field in the random access burst
11. The method as in claim 7, wherein a small number of preambles is reserved for the MBMS feedback transmission
12. The method as in claim 7, wherein the MBMS feedback transmission is carried as implicit or explicit information
13. A method for wireless communication with a wireless transmit receive unit (WTRU), comprising: establishing an uplink shared channel; and concurrently transmitting feedback information for MBMS services on the uplink shared channel with other uplink information
14. The method as in claim 13, wherein the shared channel is a data channel and the other uplink information is uplink data and data-associated control information
15. The method as in claim 13, wherein the shared channel is a control channel and the other uplink information is control information
16. The method as in claim 13, further comprising establishing an RRC connection and an uplink shared channel in the current transmission time interval (TTI)
17. A method for wireless communication using a Node B, comprising: the Node B pre-allocating a time-frequency region in an uplink channel for an MBMS feedback transmission; and the Node B receiving the MBMS feedback as a pre-defined burst in the pre- allocated time-frequency region of the uplink channel
18. The method of claim 35, wherein the MBMS feedback is a NACK message, a channel quality indicator (CQI) or a response to network counting or polling
19. The method as in claim 17, wherein the Node B detects whether there is any MBMS feedback by detecting if the received signal power in the pre- allocated time-frequency region exceeds a pre-defined threshold.
20. A method for wireless communication using a Node B, comprising: the Node B pre-allocating a common channelization code in an uplink channel for an MBMS feedback transmission; and the Node B receiving the MBMS feedback as a pre-defined burst using the pre-allocated common channelization code of the uplink channel.
21. In a wireless communication system including a plurality of wireless transmit/receive units (WTRUs) and a Node B, a method for reducing uplink feedback signaling for transmission of multicast services data over a high speed downlink packet access (HSDPA) channel, the method comprising: receiving a triggering criterion for reporting a channel quality indicator (CQI); and sending a CQI to the Node B if the triggering criterion is satisfied.
22. The method as in claim 21 wherein the triggering criterion is a current operating CQI value at the Node B, whereby the WTRU transmits the CQI when the WTRU1S channel conditions are not better than the current operating CQI value.
23. The method as in claim 22 wherein the current operating CQI value is received by the WTRU on a high speed shared control channel (HS-SCCH).
24. The method as in claim 22 wherein the current operating CQI value is received by the WTRU on a HSDPA medium access control (MAC-hs) header.
25. The method as in claim 22 wherein the current operating CQI value is received by the WTRU on a multimedia broadcast multicast services (MBMS) control channel (MCCH).
26. The method as in claim 22 wherein the current operating CQI value is received by the WTRU using a physical layer signaling.
27. The method as in claim 21 wherein the triggering criterion is generated based on reception of erroneous high speed downlink shared channel (HS-DSCH) transport blocks.
28. The method as in claim 21 wherein the transmission of a CQI is triggered upon reception of N consecutive failed HS-DSCH transport blocks.
29. The method as in claim 21 wherein the transmission of a CQI is triggered upon reception of N failed HS-DSCH transport blocks out of M HS- SCCH transport blocks, wherein the values N and M are configurable by the system.
30. The method as in claim 21 wherein the triggering criterion is a predetermined time period, whereby the WTRU transmits the CQI if the WTRU has not sent a CQI for the predetermined time period.
31. In a wireless communication system including a Node B and a plurality of wireless transmit/receive units (WTRUs), a method for reducing uplink feedback signaling for transmission of multicast services data over a high speed downlink packet access (HSDPA) channel, the method comprising: the WTRU sending an indication of at least one of an average number of transmissions needed to successfully decode the data and an error rate.
32. The method as in claim 31 wherein the indication is transmitted at a relatively high interval.
33. The method as in claim 31 wherein the indication is transmitted only if it is different from the previously transmitted indication.
34. The method as in claim 31 wherein the indication is transmitted only if a triggering condition is met.
35. The method as in claim 31, wherein the WTRU does not transmit the indication if the error rate or the average required number of transmissions is below a certain threshold.
36. The method as in claim 31, further comprising the Node B adjusting a modulation and coding scheme, or a transmission power level, or a combination thereof, based on the indication.
37. A wireless transmit receive unit (WTRU) in wireless communication system that supports multimedia broadcast multicast service (MBMS), comprising: a processor configured to send a random access channel (RACH) preamble containing a request for an uplink shared channel allocation; to receive the uplink shared channel allocation; and to send a multimedia broadcast multicast service (MBMS) feedback transmission on the shared uplink channel.
38. The WTRU as in claim 37, wherein the RACH is a synchronized RACH preamble.
39. The WTRU as in claim 38 wherein the WTRU is in an LTE_Active state.
40. The WTRU of claim 37, wherein the WTRU uses a non-synchronized RACH preamble.
41. The WTRU as in claim 40 wherein the WTRU is in an LTE_Active state or an LTE_Idle state.
42. The WTRU as in claim 37, wherein the WTRU sends a message with an indication that the cause for random access to the RACH is feedback for MBMS.
43. A wireless transmit receive unit (WTRU) in a wireless communication system that supports multimedia broadcast multicast service (MBMS), comprising:', 'a processor configured to send in a random access channel (RACH) preamble, an indication that the cause for random access to the RACH is feedback for MBMS; and to send a multimedia broadcast multicast service (MBMS) feedback transmission on the RACH.
44. The WTRU as in claim 43, wherein the RACH used by the WTRU is a synchronized RACH.
45. The WTRU as in claim 43, wherein the RACH used by the WTRU is a non-synchronized RACH.
46. The WTRU as in claim 43, wherein the MBMS feedback transmission is sent within a message/control bits field in the random access burst.
47. The WTRU as in claim 43, wherein a small number of preambles is reserved for the MBMS feedback transmission.
48. The WTRU as in claim 43, wherein the MBMS feedback transmission is carried as implicit or explicit information.
49. A wireless transmit receive unit (WTRU) in a wireless communication system that supports multimedia broadcast multicast service (MBMS), comprising:', 'a processor configured to establish an uplink shared channel; and to concurrently transmit feedback information for MBMS services on the uplink shared channel with other uplink information.
50. The WTRU as in claim 49, wherein the shared channel is a data channel and the other uplink information is uplink data and data-associated control information.
51. The WTRU as in claim 49, wherein the shared channel is a control channel and the other uplink information is control information.
52. The WTRU as in claim 49, further comprising a radio resource control (RRC) entity configured to establish an RRC connection and an uplink shared channel in the current transmission time interval (TTI).
53. A wireless communication system having a wireless transmit/receive unit (WTRU) and a Node B, comprising:', 'the Node B configured to pre-allocate a time-frequency region in an uplink channel for an MBMS feedback transmission; and', 'the WTRU configured to transmit the MBMS feedback as a predefined burst in the pre-allocated time-frequency region of the uplink channel.
54. The system of claim 53, wherein the MBMS feedback is a NACK message, a channel quality indicator (CQI) or a response to network counting or polling.
55. The system as in claim 53, wherein the Node B detects whether there is any MBMS feedback by detecting if the received signal power in the pre- allocated time-frequency region exceeds a pre-defined threshold.
56. A wireless communication system, comprising:', 'a Node B configured to pre-allocate a common channelization code in an uplink channel for an MBMS feedback transmission; and', 'a wireless transmit/receive unit (WTRU) configured to transmit the MBMS feedback as a pre-defined burst using the pre-allocated common channelization code of the uplink channel.
57. A Node B adapted to perform MBMS transmissions; to pre-allocate a time-frequency region in an uplink channel for an MBMS feedback transmission; and to receive the MBMS feedback as a pre-defined burst in the pre-allocated time-frequency region of the uplink channel.
58. The Node B as in claim 60, wherein the MBMS feedback is a NACK message, a channel quality indicator (CQI) or a response to network counting or polling.
59. The Node B as in claim 57, wherein the Node B detects whether there is any MBMS feedback by detecting if the received signal power in the pre- allocated time-frequency region exceeds a pre-defined threshold.
60. A Node B adapted to perform MBMS transmissions in a wireless communication; to pre-allocate a common channelization code in an uplink channel for an MBMS feedback transmission; and to receive the MBMS feedback as a pre-defined burst using the pre-allocated common channelization code of the uplink channel.']
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