SYSTEMS AND METHODS FOR UPLINK FEEDBACK FOR HIGH-SPEED DOWNLINK PACKET ACCESS (HSPDA)

• US 20150049743A1
• Filed: 10/29/2014
• Published: 02/19/2015
• Est. Priority Date: 10/01/2010
• Status: Active Grant

• Current Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Original Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Inventors: Cai, Lujing, Xi, Fengjun, Pani, Diana, Pelletier, Benoit, Cave, Christopher
• Granted Patent: US 9,295,041 B2
• Time in Patent Office: Days
• US Class Current: 370/336
• CPC Class Codes: H04L 1/1614 using bitmaps
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1854 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04W 52/325 Power control of control or pilot channels
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network

Abstract

Systems and method for uplink feedback for multipoint transmission of high-speed downlink packet access (MP-HSDPA) that may improve downlink transmission efficiency and cell coverage. For example, Channel Quality Indicator (CQI) and/or Precoding Control Indicator (PCI) that may be calculated to accommodate the needs of coordinated dynamic network scheduling. Additionally, various frame structures may be generated for the uplink feedback that may carry multiple CQI and HARQ-ACK feedbacks from MP-HSDPA. The frame structures may also address asynchronous downlink transmissions between two cells. Moreover, HS-DPCCH power offset settings for both CQI and HARQ-ACK fields that may be modified and/or created to ensure reliable uplink feedback transmission.

Claims

1. A wireless transmit/receive unit (WTRU) configured at least in part to:

determine a first time for a first sub-frame from a first cell;

determine a second time for a second sub-frame from a second cell;

determine a timing relationship using the first time and the second time; and

encoding a first uplink feedback message for the first cell and a second uplink feedback message for the second cell into a composite feedback message using the timing relationship.

2. The WTRU of claim 1, wherein the WTRU is further configured to determine an allowance parameter.

3. The WTRU of claim 1, wherein the first uplink feedback message is a multipoint transmission acknowledgment/not-acknowledgement (ACK/NACK) message.

4. The WTRU of claim 2, wherein the WTRU is further configured such that the determining the timing relationship includes:

calculating a time difference by subtracting the first time from the second time;

determining a lower bound range and an upper bound range using the allowance parameter;

comparing the time difference with a range defined by the lower bound range and the upper bound range; and

pairing the first uplink feedback message with the second uplink feedback message when the time difference falls into the range.

5. The WTRU of claim 4, wherein the WTRU is further configured to determine a time offset.

6. The WTRU of claim 5, wherein the WTRU is further configured to adjust the time offset when the time difference is near the lower bound range or the upper bound range.

7. The WTRU of claim 5, wherein the WTRU is further configured to enable a network to configure the time offset via a radio resource control signal.

8. The WTRU of claim 7, wherein the WTRU is configured such that the composite feedback message includes a jointly encoded hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback message.

9. A method comprising:

determining a first time or a first sub-frame from a first cell;

determining a second time for a second sub-frame from a second cell;

determining a timing relationship using the first time and the second time; and

encoding a first uplink feedback message for the first cell and a second uplink feedback message for a second cell into a composite feedback message using the timing relationship.

10. The method of claim 9, further comprising determining an allowance parameter for sending uplink feedback.

11. The method of claim 9, wherein the first uplink feedback message is a multipoint transmission acknowledgment/not-acknowledgment (ACK/NACK) message.

12. The method of claim 10, wherein determining the timing relationship comprises:

calculating a time difference by subtracting the first time from the second time;

determining a lower bound range and an upper bound range using the allowance parameter;

comparing the time difference with a range defined by the lower bound range and the upper bound range; and

pairing the first uplink feedback message with the second uplink feedback message when the time difference falls into the range.

13. The method of claim 12, further comprising determining a time offset.

14. The method of claim 13, further comprises adjusting the time offset when the time difference is near the lower bound range or the upper bound range.

15. The method of claim 13, further comprising enabling a network to configure the time offset via radio resource control signal.

16. The method of claim 12, wherein the composite feedback message is a jointly encoded hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback message.

17. The method of claim 16, wherein sending the composite feedback message comprises sending the composite feedback message via a high speed dedicated physical control channel (HS-DPCCH).

18. A wireless transmit/receive unit (WTRU) comprising:

a processor; and

a memory comprising instructions that when executed by the processor cause the WTRU to;

determine a first time for a first sub-frame from a first cell;

determine a second time for a second sub-frame from a second cell;

determine an allowance parameter for sending uplink feedback; and

determine a timing relationship using the first time, the second time, and the allowance parameter.

19. The WTRU of claim 18, wherein the memory further comprises instructions that when executed by the processor cause the WTRU to encode a first uplink feedback message for the first cell and a second uplink feedback message for the second cell into a composite feedback message using the timing relationship.

20. The WTRU of claim 19, wherein the memory further comprises instructions such that the determining the timing relationship includes:

calculating a time difference by subtracting the first time from the second time;

determining a lower bound range and an upper bound range using the allowance parameter;

comparing the time difference with a range defined by the lower bound range and the upper bound range; and

pairing the first uplink feedback message with the second uplink feedback message when the time difference falls into the range.