Method and Apparatus for Feeding Back and Receiving Acknowledgement Information of Semi-Persistent Scheduling Data Packets

• US 20110194521A1
• Filed: 04/26/2011
• Published: 08/11/2011
• Est. Priority Date: 11/05/2008
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Hou, Yunzhe, Li, Bo, Liu, Guang, Fan, Xiaoan
• Granted Patent: US 8,358,621 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 1/1614 using bitmaps
• 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 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04W 72/12 Wireless traffic scheduling

Abstract

A method and apparatus for feeding back and receiving acknowledgment (ACK) information of semi-persistent scheduling (SPS) data packets are disclosed. The method for feeding back ACK information of SPS data packets includes receiving an uplink downlink assignment index (UL DAI) from a base station (BS), wherein the UL DAI indicates a number (N) of downlink data packets, mapping acknowledgements/negative acknowledgements (ACKs/NAKs) of k SPS data packets of the downlink data packets to positions from the (N−k+1)th ACK/NAK to the Nth ACK/NAK, and feeding back N ACKs/NAKs to the BS.

Claims

1. A method for feeding back acknowledgement (ACK) information of semi-persistent scheduling (SPS) data packets, the method comprising:

receiving an uplink downlink assignment index (UL DAI) sent by a base station (BS), wherein a value of the UL DAI indicates a number (N) of downlink data packets;

mapping an acknowledgement/negative acknowledgement (ACK/NAK) of an SPS data packet of the downlink data packets to a position of an Nth ACK/NAK; and

feeding back N ACKs/NAKs to the BS.

2. The method of claim 1, further comprising:

mapping ACKs/NAKs of non-SPS data packets of the downlink data packets to positions from a first ACK/NAK among the N ACKs/NAKs.

3. The method of claim 2, wherein mapping the ACKs/NAKs of the non-SPS data packets of the downlink data packets to positions from the first ACK/NAK among the N ACKs/NAKs comprises:

receiving a Downlink Assignment Index (DL DAI) from the BS, wherein a value of the DL DAI indicates that a downlink data packet is an Mth non-SPS data packet of the downlink data packets; and

mapping an ACK/NAK of the Mth non-SPS data packet at a position of an Mth ACK/NAK.

4. The method of claim 2, wherein the SPS data packet is a kind of data packet without a resource scheduling index and the non-SPS data packets comprise data packets with a resource scheduling index.

5. The method of claim 1, wherein N is three or four.

6. The method of claim 1, further comprising:

feeding back the N ACKs/NAKs by a physical downlink shared channel (PDSCH) to the BS.

7. A method for receiving acknowledgement (ACK) information of semi-persistent scheduling (SPS) data packets, the method comprising:

sending an uplink downlink assignment index (UL DAI) to a User Equipment (UE), wherein a value of the UL DAI indicates a number (N) of downlink data packets; and

receiving N acknowledgements/negative acknowledgements (ACKs/NAKs) sent by the UE, wherein a position of an Nth ACK/NAK is used for mapping an ACK/NAK of an SPS data packet of the downlink data.

8. The method of claim 7, further comprising:

transmitting an SPS activation signaling at a next time of semi-persistent transmission in response to receiving a NAK feedback to an SPS activation sub-frame.

9. The method of claim 7, further comprising:

transmitting an SPS activation signaling at a time of SPS retransmission in response to receiving a NAK feedback to an SPS activation sub-frame.

10. The method of claim 7, wherein ACKs/NAKs of SPS data packets of the downlink data are mapped to positions from a first ACK/NAK among N ACKs/NAKs.

11. The method of claim 10, further comprising:

sending a Downlink Assignment Index (DL DAI) to the UE, wherein a value of the DL DAI indicates that a downlink data packet is an Mth non-SPS data packet of the downlink data packets; and

receiving M ACKs/NAKs, wherein the Mth non-SPS data packet is mapped at a position of an Mth ACK/NAK.

12. The method of claim 7, wherein N is three or four.

13. The method of claim 7, further comprising:

receiving the N ACKs/NAKs by a physical downlink shared channel (PDSCH) from the UE.

14. An apparatus for feeding back acknowledgement (ACK) information of semi-persistent scheduling (SPS) data packets, the apparatus comprising:

a receiving unit configured to receive an uplink downlink assignment index (UL DAI) from a base station (BS), wherein a value of the UL DAI indicates a number (N) of downlink data packets;

a processing unit configured to map an ACK/NAK of an SPS data packet of the downlink data packets to a position of an Nth ACK/NAK; and

a feedback unit configured to feed back N ACKs/NAKs to the BS.

15. The apparatus of claim 14, wherein the processing unit is further configured to map ACKs/NAKs of non-SPS data packets of the downlink data packets to positions from a first ACK/NAK among the N ACKs/NAKs.

16. The apparatus of claim 14, wherein the receiving unit is further configured to receive a Downlink Assignment Index (DL DAI) from the BS, wherein a value of the DL DAI indicates that a downlink data packet is an Mth non-SPS data packet of the downlink data packets;

and

wherein the processing unit is further configured to map an ACK/NAK of the Mth non-SPS data packet at a position of the Mth ACK/NAK.

17. The apparatus of claim 15, wherein the SPS data packet is a kind of data packet without a resource scheduling index and the non-SPS data packets comprise data packets with a resource scheduling index.

18. The apparatus of claim 14, wherein N is three or four.

19. The apparatus of claim 14, wherein the N ACKs/NAKs are fed back in a physical downlink shared channel (PDSCH).