HARQ-ACK handling for unintended downlink sub-frames

• US 8,958,331 B2
• Filed: 12/20/2012
• Issued: 02/17/2015
• Est. Priority Date: 07/02/2012
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Intel Corporation
• Inventors: Han, Seunghee, He, Hong, Fwu, Jong-Kae
• Primary Examiner(s): HO, DUC CHI
• Application Number:
  US13/721,458
• Publication Number:
  US 20140003302A1
• Time in Patent Office: 789 Days
• Field of Search: 370/252, 370/280, 370/329
• US Class Current: 370/252
• 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 1/1607 Details of the supervisory signal
• CPC Class Codes: H04L 1/1628 List acknowledgements, i.e. the acknowledgement message consisting of a list of identifiers, e.g. of sequence numbers H04L1/1614 takes precedence
• 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 1/1887 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04L 5/0073 Allocation arrangements that take into account other cell interferences for intercell interference mitigation or co-ordination in orthogonal multiplex systems H04J11/005
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04L 5/1469 using time-sharing
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 28/0205 at the air interface dynamic wireless traffic scheduling H04W72/12
• CPC Class Codes: H04W 36/22 for handling the traffic
• CPC Class Codes: H04W 4/00 Services specially adapted for wireless communication networks; Facilities therefor
• CPC Class Codes: H04W 4/70 Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 48/12 : using downlink control channel
• CPC Class Codes: H04W 52/0206 : in access points, e.g. base stations access point devices per se H04W88/08
• CPC Class Codes: H04W 52/0209 : in terminal devices terminal devices per se H04W88/02
• CPC Class Codes: H04W 52/0212 : managed by the network, e.g. network or access point is master and terminal is slave
• CPC Class Codes: H04W 52/0245 : according to signal strength
• CPC Class Codes: H04W 52/383 : power control in peer-to-peer links
• CPC Class Codes: H04W 68/00 : User notification, e.g. alerting and paging, for incoming communication, change of service or the like
• CPC Class Codes: H04W 72/0446 : Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/046 : the resource being in the space domain, e.g. beams
• CPC Class Codes: H04W 72/12 : Wireless traffic scheduling
• CPC Class Codes: H04W 72/21 : in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 : in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/30 : Resource management for broadcast services
• CPC Class Codes: H04W 76/28 : Discontinuous transmission [DTX]; Discontinuous reception [DRX]
• CPC Class Codes: H04W 88/08 : Access point devices
• CPC Class Codes: H04W 92/02 : Inter-networking arrangements
• CPC Class Codes: Y02D 30/70 : in wireless communication networks
• CPC Class Codes: Y02E 40/60 : Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment

Abstract

Disclosed in some examples is a method for providing a HARQ response in an LTE network for a PUCCH format 1b. The method includes receiving one or more downlink assignments of a bundling window over a wireless downlink control channel; setting a reception status for each sub-frame of a downlink data channel in the bundling window based on whether the sub-frame on the downlink data channel was associated with a particular one of the received downlink assignments and based upon whether the sub-frame was successfully received; setting a reception status of sub-frames of the downlink data channel in the bundling window that did not have a corresponding downlink assignment to a predetermined value; and transmitting a response, the response based upon the reception statuses set by the response module.

Claims

1. A method comprising:

receiving a downlink sub-frame, the downlink sub-frame having an index value j and a downlink assignment index (DAI);

determining that the DAI is not equal to j+p where p is a constant; and

transmitting a HARQ reception status of Discontinuous Reception (DTX) for the downlink sub-frame in response to the determination.

2. The method of claim 1, further comprising:

determining if there is a downlink shared channel transmission on a primary cell without a corresponding downlink control channel in a bundling window, the bundling window comprising M downlink sub-frames;

responsive to determining that there is a downlink shared channel without a corresponding downlink control channel, setting p to 0; and

responsive to determining that there are no downlink shared channels without a corresponding downlink control channel, setting p to 1.

3. The method of claim 1, wherein the HARQ reception status is transmitted using a Physical Uplink Control Channel (PUCCH) format 1b.

4. The method of claim 1, wherein transmitting the HARQ reception status includes selecting at least one of a PUCCH uplink resource, a constellation, or a set of code input bits based upon the HARQ reception status.

5. A User Equipment (UE) comprising:

Hybrid Automatic Repeat Request (HARQ) circuitry arranged to;

receive a downlink sub-frame, the downlink sub-frame having an index value j and a downlink assignment index (DAI), the DAI being received over a Physical Downlink Control Channel (PDCCH);

determine that the (DAI) is not equal to j+p, where p is a constant and where p is a based on a physical downlink channel relationship; and

set a HARQ reception status corresponding to the downlink sub-frame to Discontinuous Reception (DTX) in response to the determination; and

transmission circuitry arranged to transmit the HARQ reception status.

6. The UE of claim 5, wherein the UE is arranged to operate in a Time Division Duplex (TDD) mode.

7. The UE of claim 5, wherein the transmission circuitry is arranged to multiplex HARQ reception statuses for a plurality of downlink sub-frames, the plurality of downlink sub-frames comprising a bundling window of M downlink sub-frames.

8. The UE of claim 7, wherein the HARQ circuitry is arranged to:

determine the physical downlink channel relationship between a Primary Downlink Shared Channel (PDSCH) transmission on a primary cell and a corresponding PDCCH detected within the bundling window;

set p to 0 responsive to determining that there is a PDSCH without a corresponding PDCCH; and

set p to 1 responsive to determining that there are no PDSCH without a corresponding PDCCH.

9. The UE of claim 7, wherein the HARQ circuitry is arranged to:

set p to 1 responsive to determining that there is a downlink shared channel transmission on a secondary cell with a corresponding control channel transmission on a primary cell.

10. The UE of claim 7, further comprising:

a touchscreen display.

11. The UE of claim 7, further comprising:

a file storage.

12. The UE of claim 5, wherein the transmission circuitry is arranged to transmit the HARQ reception statuses using a Physical Uplink Control Channel (PUCCH) format 1b.

13. The UE of claim 5, wherein the transmission circuitry is arranged to transmit the HARQ reception status by selecting a PUCCH uplink resource, a constellation, and a set of code input bits based upon the reception status.

14. The UE of claim 5, wherein the UE is arranged to communicate with a wireless network using a Long Term Evolution (LTE) family of standards.

15. A non-transitory computer-readable medium comprising instructions that, when executed on a device, cause the device to:

receive a downlink sub-frame, the downlink sub-frame having an index j and a downlink assignment index (DAI), the DAI being received over a Physical Downlink Control Channel (PDCCH);

determine that the DAI is not equal to j+p, where p is a constant;

set a HARQ reception status corresponding to the downlink sub-frame to discontinuous transmission (DTX) in response to the determination; and

transmit the HARQ reception status using a Physical Uplink Control Channel (PUCCH) format 1b.

16. The computer-readable medium of claim 15 further comprising instructions that, when executed on the device, cause the device to:

determine if there is a downlink shared channel transmission on a primary cell without a corresponding downlink control channel detected within the bundling window;

set p to 0 responsive to determining that there is a downlink shared channel without a corresponding downlink control channel;

set p to 1 responsive to determining that there are no downlink shared channel without a corresponding downlink control channel.

17. The computer-readable medium of 15, further comprising instructions that, when executed on the device, cause the device to:

set p to 1 responsive to determining that there is a downlink shared channel transmission on a secondary cell with a corresponding control channel transmission on a primary cell.