METHOD AND APPARATUS FOR PRE-ALLOCATION OF UPLINK CHANNEL RESOURCES

• US 20090109912A1
• Filed: 10/23/2008
• Published: 04/30/2009
• Est. Priority Date: 10/25/2007
• Status: Abandoned Application

• Current Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Original Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Inventors: Marinier, Paul, Pani, Diana, Cave, Christopher R., DiGirolamo, Rocco
• Application Number:
  US12/256,916
• Publication Number:
  US 20090109912A1
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/006 Quality of the received signal, e.g. BER, SNR, water filling
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04W 74/006 in the downlink, i.e. towards the terminal
• CPC Class Codes: H04W 74/04 Scheduled access hybrid access H04W74/02
• CPC Class Codes: H04W 76/27 Transitions between radio resource control [RRC] states

Abstract

A method and apparatus for pre-allocating uplink resources in CELL-FACH are disclosed. A wireless transmit/receive unit (WTRU) in CELL_FACH or CELL_PCH states may be pre-allocated with an uplink resource when a downlink transmission is transmitted. The WTRU may then use the pre-allocated uplink resource for channel quality information or hybrid automatic repeat request (HARQ) feedback, or any other purposes. The pre-allocated uplink resource may be enhanced dedicated channel (E-DCH) resource or high speed dedicated physical control channel (HS-DPCCH) resource.

Claims

1. A method for pre-allocating a resource for uplink transmission, the method comprising:

a wireless transmit/receive unit (WTRU) receiving a high speed downlink channel (HS-DSCH) transmission while in one of a CELL_FACH and CELL_PCH state;

the WTRU receiving a downlink message including a pre-allocated index to an uplink resource; and

the WTRU transmitting uplink transmission and uplink feedback information using the pre-allocated uplink resource.

2. The method of claim 1 wherein the uplink resource is one of an enhanced dedicated channel (E-DCH) resource, a high speed dedicated physical control channel (HS-DPCCH) resource, and a reserved random access channel (RACH) preamble signature.

3. The method of claim 2 wherein the E-DCH resource contains HS-DPCCH resource information.

4. The method of claim 1 wherein the uplink transmission and the uplink feedback information are transmitted without performing a collision resolution phase.

5. The method of claim 1 wherein the downlink transmission containing the pre-allocated index is sent using a high speed shared control channel (HS-SCCH) order.

6. The method of claim 2 wherein the E-DCH resource is allocated only if the WTRU has uplink data to transmit.

7. The method of claim 2 wherein the HS-DPCCH resource is part of a resource pool separate from E-DCH resource pool.

8. The method of claim 1 wherein the WTRU transmits at least one of channel quality indicator (CQI) and hybrid automatic repeat request (HARQ) feedback on the uplink feedback information.

9. The method of claim 8 wherein the CQI is included in one of MAC-e header, MAC-es header, MAC-i header, and MAC-is header.

10. The method of claim 8 wherein the CQI is included in a MAC-i header 0 that is transmitted for contention resolution.

11. The method of claim 1 wherein the uplink resource is allocated by sending the index to a group of resources broadcast over a system information block (SIB).

12. The method of claim 1 wherein the uplink resource is allocated if the downlink transmission requires a WTRU response.

13. The method of claim 1 wherein the uplink resource is allocated if downlink transmission requires up-to-date channel quality information.

14. The method of claim 1 wherein the uplink resource is released and returned to a common pool of resources if unused until expiration of a timer.

15. The method of claim 1 wherein the WTRU performs a random access channel (RACH) power ramp-up procedure to set a proper uplink transmit power level for the uplink transmission.

16. The method of claim 15 wherein the WTRU receives a RACH preamble signature and/or an access slot reserved for power control establishment and uses the reserved RACH preamble and/or access slot for the RACH power ramp-up procedure.

17. The method of claim 1 wherein the WTRU initiates dedicated physical control channel (DPCCH) transmission and transmits the uplink transmission without performing a random access channel (RACH) power ramp-up procedure.

18. The method of claim 17 wherein a transmit power of the DPCCH is determined based on one of DPCCH power offset and a measured metric, DPCCH power offset and broadcast uplink interference, DPCCH power offset and initial RACH preamble power.

19. The method of claim 17 wherein a transmit power of the DPCCH is set to a fixed transmit power determined and broadcasted by a network.

20. The method of claim 1 wherein the WTRU performs a synchronization procedure to allow a power control loop to synchronize for the uplink transmission.

21. A method for providing channel quality information, the method comprising:

a wireless transmit/receive unit (WTRU) in a CELL_PCH state receiving a downlink transmission; and

the WTRU transmitting a channel quality indicator (CQI) in response to the downlink transmission.

22. The method of claim 21 wherein the downlink transmission includes a pre-allocated uplink resource.

23. The method of claim 21 further comprising:

the WTRU sending hybrid automatic repeat request (HARQ) feedback in response to the downlink transmission.

24. A wireless transmit/receive unit (WTRU) for pre-allocating a resource for uplink transmission, the WTRU comprising:

a transceiver configured to receive a downlink transmission and transmit an uplink transmission and uplink feedback information while in one of CELL_FACH and CELL_PCH states, the downlink transmission including a pre-allocated index to an uplink resource; and

a controlling unit configured to control the uplink transmission and the uplink feedback information transmission using the pre-allocated uplink resource.

25. The WTRU of claim 24 wherein the uplink resource is at least one of an enhanced dedicated channel (E-DCH) resource, a high speed dedicated physical channel (HS-DPCCH) resource, and a reserved random access channel (RACH) preamble signature.

26. The WTRU of claim 25 wherein the E-DCH resource contains HS-DPCCH resource information.

27. The WTRU of claim 24 wherein the uplink transmission and the uplink feedback information are transmitted without performing a collision resolution phase.

28. The WTRU of claim 24 wherein the downlink transmission containing the pre-allocated index is sent using a high speed shared control channel (HS-SCCH) order.

29. The WTRU of claim 25 wherein the E-DCH resource is allocated only if the WTRU has uplink data to transmit.

30. The WTRU of claim 25 wherein the HS-DPCCH resource is part of a resource pool separate from E-DCH resource pool.

31. The WTRU of claim 24 wherein the WTRU transmits at least one of a channel quality indicator (CQI) and hybrid automatic repeat request (HARQ) feedback on the uplink feedback information.

32. The WTRU of claim 31 wherein the CQI is included in one of a MAC-e header, a MAC-es header, a MAC-i header, and a MAC-is header.

33. The WTRU of claim 31 wherein the CQI is included in a MAC-i header 0 that is transmitted for contention resolution.

34. The WTRU of claim 24 wherein the uplink resource is allocated by sending the index to a group of resources broadcast over a system information block (SIB).

35. The WTRU of claim 24 wherein the uplink resource is allocated if the downlink transmission requires a WTRU response.

36. The WTRU of claim 24 wherein the uplink resource is allocated if downlink transmission requires up-to-date channel quality information.

37. The WTRU of claim 24 wherein the uplink resource is released and returned to a common pool of resources if unused until expiration of a timer.

38. The WTRU of claim 24 wherein the controlling unit performs a random access channel (RACH) power ramp-up procedure to set a proper uplink transmit power level for the uplink transmission.

39. The WTRU of claim 24 wherein the controlling unit receives a RACH preamble signature and/or an access slot reserved for power control establishment and uses the reserved RACH preamble and/or access slot for the RACH power ramp-up procedure.

40. The WTRU of claim 24 wherein the controlling unit initiates dedicated physical control channel (DPCCH) transmission and transmits the uplink transmission without performing a random access channel (RACH) power ramp-up procedure.

41. The WTRU of claim 40 wherein a transmit power of the DPCCH is determined based on one of DPCCH power offset and a measured metric, DPCCH power offset and broadcast uplink interference, DPCCH power offset and initial RACH preamble power.

42. The WTRU of claim 40 wherein a transmit power of the DPCCH is set to a fixed transmit power determined and broadcasted by a network.

43. The WTRU of claim 24 wherein the WTRU performs a synchronization procedure to allow a power control loop to synchronize for the uplink transmission.

44. A wireless transmit/receive unit (WTRU) configured to provide channel quality information, the WTRU comprising:

a transceiver configured to receive a downlink transmission while in a CELL_PCH state; and

a controlling unit configured to transmit a channel quality indicator (CQI) in response to the downlink transmission.

45. The WTRU of claim 44 wherein the downlink transmission includes a pre-allocated uplink resource.

46. The WTRU of claim 44 wherein the controlling unit is configured to send hybrid automatic repeat request (HARQ) feedback in response to the downlink transmission.