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

• US 8,249,010 B2
• Filed: 11/02/2009
• Issued: 08/21/2012
• 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): Chan, Sai-Ming
• Application Number:
  US12/610,618
• Publication Number:
  US 20100111024A1
• Time in Patent Office: 1,023 Days
• Field of Search: 370/329, 370/336, 370/400, 455/68
• 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

The present invention relates to radio communications, and discloses a method and apparatus for feeding back and receiving acknowledgment (ACK) information of semi-persistent scheduling (SPS) data packets. 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), where the value of the UL DAI indicates the number of downlink data packets (N); mapping ACKs/NAKs of k SPS data packets of the downlink data packets to positions from the (N−k+1)th ACK/NAK to the N^th ACK/NAK; and feeding back N ACKs/NAKs to the BS. This method can guarantee that N ACKs/NAKs are arranged correctly.

Claims

1. A method for a base station to receive acknowledgement (ACK) information of semi-persistent scheduling (SPS) data packets, comprising:

sending an plink data assignment indicator (UL DAI) to a User Equipment (UE), wherein the UL DAI indicates a number (N) of downlink data packets sent to the UE, wherein the number N is larger than one, and wherein a number k (k<

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

receiving from the UE a feedback signal comprising N acknowledgements/negative acknowledgements (ACKs/NAKs) acknowledging the N downlink data packets starting from the first ACK/NAK at the first position, 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.

2. The method of claim 1, further comprising:

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

3. 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.

4. The method of claim 3, further comprising:

sending a downlink data assignment indicator (DL DAI) to the UE, wherein the DL DAI indicates that a downlink data packet is a Mth non-SPS data packet of the downlink data packets (M≧

N−

k);

wherein the received feedback signal comprises N−

k ACK/NAKs of the non-SPS data packets, an acknowledgement of the Mth non-SPS data packet is placed at the Mth position of the N ACKs/NAKs.

5. The method of claim 1, wherein the positions from the (N−

k+1)th ACK/NAK to the Nth ACK/NAK are used for arranging the acknowledgement of k SPS data packets of the downlink data packets in a positive sequence or a negative sequence or according to an arrival sequence of the SPS data packets.

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

6. A base station, comprising:

a sending unit, configured to send an uplink data assignment indicator (UL DAI) to a user equipment (UE), wherein the UL DAI indicates a number (N) of downlink data packets sent to the UE;

wherein the number N is larger than one, and wherein a number k (k<

N) of the downlink data packets is/are semi-persistent scheduling (SPS) data packets; and

a receiving unit, configured to receive from the UE a feedback signal comprising N acknowledgements/negative acknowledgements (ACKs/NAKs) acknowledging the N downlink data packets starting from the first ACK/NAK at the first position, 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.

7. The base station of claim 6, wherein the sending unit is further configured to transmit a SPS activation signaling, and wherein when the receiving unit receives a feedback NAK, the sending unit is further configured to transmit one more SPS activation signaling at a next time of semi-persistent transmission, or transmit one more SPS activation signaling at a time of SPS retransmission, wherein the retransmitted SPS activation signaling is the same as or different from the SPS activation signaling.

8. The base station of claim 6, 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.

9. The base station of claim 6, wherein k=1.

11. A non-transitory computer readable storage medium storing program codes thereon for use by a base station, wherein the program codes comprise:

instructions for sending an uplink data assignment indicator (UL DAI) to a user equipment (UE), wherein the UL DAI indicates a number (N) of downlink data packets sent to the UE, wherein the number N is larger than one, and wherein a number k (k downlink data packets is/are semi-persistent scheduling (SPS) data packets; and

instructions for receiving from the UE a feedback signal comprising N acknowledgements/negative acknowledgements (ACKs/NAKs) acknowledging the N downlink data packets starting from the first ACK/NAK at the first position, 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.

12. The computer program product of claim 11, wherein k=1.

13. The computer program product of claim 11, wherein ACKs/NAKs of non-SPS data packets of the downlink data packets is/are placed from the first position of the N ACKs/NAKs.