Method and apparatus for feeding back and receiving acknowledgement information of semi-persistent scheduling data packets

• US 8,358,621 B2
• Filed: 04/26/2011
• Issued: 01/22/2013
• 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: Fan, Xiaoan, Liu, Guang, Li, Bo, Hou, Yunzhe
• Primary Examiner(s): Mered, Habte
• Application Number:
  US13/094,697
• Publication Number:
  US 20110194521A1
• Time in Patent Office: 637 Days
• Field of Search: 370203-210, 370/230.1, 370/242, 370/280, 370310-352, 370/395.4, 370/395.41, 370/412, 370/400, 370/480, 370/482, 370/498, 370/522, 455450-454, 455/464, 455/550, 714749-764, 375/233, 37524004-24007, 375/252, 375/260, 375/343, 375/354, 375/358, 375/364
• 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 a user equipment (UE) to feed back acknowledgement (ACK) information of semi-persistent scheduling (SPS) data packets, comprising:

receiving an uplink data assignment indicator (UL DAI) from a base station (BS), wherein the UL DAI indicates a number (N) of downlink data packets sent by the BS, wherein the number N is greater than 1, and wherein a number k (k<

N) of the downlink data packets is/are SPS data packets;

forming a feedback signal comprising N acknowledgements/negative acknowledgements (ACKs/NAKs) acknowledging the N downlink data packets, wherein k ACKs/NAKs of the k SPS data packets is/are placed from (N−

k+1)th to Nth positions of the N ACKs/NAKs in an uplink ACK/NAK multiplexing mode; and

sending the feedback signal to the BS starting from the ACK/NAK at the first position.

2. The method of claim 1, wherein N−

k ACKs/NAKs of non-SPS data packets of the downlink data packets is/are placed from the first position of the N ACKs/NAKs.

3. The method of claim 2, further comprising:

receiving a downlink data assignment indicator (DL DAI) from the BS, wherein the DL DAI indicates that a downlink data packet is an Mth non-SPS data packet of the downlink data packets (M≦

N−

k);

wherein an ACK/NAK of the Mth non-SPS data packet is placed at a Mth position of the N ACKs/NAKs.

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

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

6. The method of claim 1, wherein sending the feedback signal to the BS comprises:

sending the feedback signal to the BS in a physical downlink shared channel (PDSCH).

7. The method of claim 1, wherein k=1.

8. A user equipment (UE), comprising:

a receiving unit, configured to receive an uplink data assignment indicator (UL DAI) from a base station (BS), wherein the UL DAI indicates a number (N) of downlink data packets sent by the BS, wherein the number N is greater than 1, and wherein a number k (k<

N) of the downlink data packets is/are SPS data packets;

a processing unit, configured to form a feedback signal comprising N acknowledgements/negative acknowledgements (ACKs/NAKs) acknowledging the N downlink data packets, wherein k ACKs/NAKs of the k SPS data packets is/are placed from (N−

k+1)th to Nth positions of the N ACKs/NAKs in an uplink ACK/NAK multiplexing mode; and

a feedback transmitting unit, configured to send the feedback signal to the BS starting from the ACK/NAK at the first position.

9. The UE of claim 8, wherein the processing unit is further configured to place N−

k-ACKs/NAKs of non-SPS data packets of the downlink data packets from the first positions of the N ACKs/NAKs.

10. The UE of claim 8, wherein the receiving unit is further configured to receive a downlink data assignment indicator (DL DAI) from the BS, wherein the DL DAI indicates that a downlink data packet is an Mth non-SPS data packet of the downlink data packets (M≦

N−

k);

wherein an ACK/NAK of the Mth non-SPS data packet is placed at a Mth position of the N ACKs/NAKs.

11. The UE of claim 9, wherein a SPS data packet is a data packet without a resource scheduling index, and a non-SPS data packet is a data packet with a resource scheduling index.

12. The UE of claim 8, wherein N is three or four.

13. The UE of claim 8, wherein the feedback signal is sent to the BS in a physical downlink shared channel (PDSCH).

14. The UE of claim 8, wherein k=1.

15. A computer program product comprising a non-transitory computer readable storage medium storing program codes thereon for use by a user equipment (UE), wherein the program codes comprise:

instructions for receiving an uplink data assignment indicator (UL DAI) from a base station (BS), wherein a value of the UL DAI indicates a number (N) of downlink data packets sent by the BS, wherein the number N is greater than 1, and wherein a number k (k<

N) of the downlink data packets is/are SPS data packets;

instructions for forming a feedback signal comprising N acknowledgements/negative acknowledgements (ACKs/NAKs) acknowledging the N downlink data packets, wherein k ACKs/NAKs of the k SPS data packets is/are placed from (N−

k+1)th to Nth positions of the N ACKs/NAKs in an uplink ACK/NAK multiplexing mode; and

instructions for sending the feedback signal to the BS starting from the ACK/NAK at the first position.

16. The computer program product of claim 15, wherein k=1.

17. The computer program product of claim 15, wherein N−

k ACKs/NAKs of non-SPS data packets of the downlink data packets is/are placed from the first position of the N ACKs/NAKs.