METHOD AND APPARATUS FOR FEEDING BACK AND RECEIVING ACKNOWLEDGEMENT INFORMATION OF SEMI-PERSISTENT SCHEDULING DATA PACKETS

• US 20100111024A1
• Filed: 11/02/2009
• Published: 05/06/2010
• 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 8,249,010 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

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 feeding back acknowledgement, ACK, information of semi-persistent scheduling, SPS, data packets, comprising:

receiving an uplink downlink assignment index, UL DAI, sent by a BS, where the value of the UL DAI indicates the number N of downlink data packets;

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.

2. The method of claim 1, wherein the mapping the ACKs/NAKs of k SPS data packets of the downlink data to positions from the (N−

k+1)th ACK/NAK to the N^th ACK/NAK comprises;

mapping the ACKs/NAKs of k SPS data packets of the downlink data to positions from the (N−

k+1)th ACK/NAK to the N^th ACK/NAK in positive or negative sequence.

3. The method of claim 1, further comprising:

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

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

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

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

5. The method of claim 3, wherein the SPS data packets are data packets without resource scheduling index and the non-SPS data packets comprise data packets with resource scheduling index.

6. The method of claim 3, wherein the SPS data packets are data packets without resource scheduling index and the non-SPS data packets comprise data packets with resource scheduling index.

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

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

receiving N ACKs/NAKs feedback sent by the UE, wherein positions from the (N−

k+1)th ACK/NAK to the Nth ACK/NAK are used for mapping k SPS data packets of the downlink data.

8. The method of claim 7, further comprising, transmitting an SPS activation signaling at the next time of semi-persistent transmission or at the time of SPS retransmission in response to receiving a NAK feedback to an SPS activation sub-frame, and the transmitted signaling is the same as or different from the SPS activation signaling.

9. The method of claim 7, wherein that the first position of N ACK/NAKs is used for mapping k SPS data packets of the downlink data comprises mapping the ACKs/NAKs of non-SPS data packets of the downlink data to positions from the first ACK/NAK among N ACKs/NAKs.

10. The method of claim 9, wherein the mapping the ACKs/NAKs of non-SPS data packets of the downlink data to positions from the first ACK/NAK among N ACKs/NAKs comprises;

sending DL DAI to the UE, wherein the value of DL DAI indicates that the downlink data packet is the Mth non-SPS data packet of the downlink data packets; and

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

11. The method of claim 7, wherein that the positions from the (N−

k+1)th ACK/NAK to the Nth ACK/NAK are used for mapping k SPS data packets of the downlink data comprises;

mapping the ACKs/NAKs of k SPS data packets of the downlink data to positions from the (N−

k+1)th ACK/NAK to the N^th ACK/NAK in positive or negative sequence.

12. The method of claim 8, wherein that the positions from the (N−

k+1)th ACK/NAK to the Nth ACK/NAK are used for mapping k SPS packets of the downlink data packets comprises;

mapping the ACKs/NAKs of k SPS packets of the downlink data packets at positions from the (N−

k+1)th ACK/NAK to the Nth ACK/NAK in positive or negative sequence.

13. The method of claim 9, wherein that the positions from the (N−

k+1)th ACK/NAK to the Nth ACK/NAK are used for mapping k SPS packets of the downlink data packets comprises;

mapping the ACKs/NAKs of k SPS packets of the downlink data packets at positions from the (N−

k+1)th ACK/NAK to the Nth ACK/NAK in positive or negative sequence.

14. The method of claim 10, wherein that the positions from the (N−

k+1)th ACK/NAK to the Nth ACK/NAK are used for mapping k SPS packets of the downlink data packets comprises;

mapping the ACKs/NAKs of k SPS packets of the downlink data packets at positions from the (N−

k+1)th ACK/NAK to the Nth ACK/NAK in positive or negative sequence.

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

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

a processing unit, adapted to map 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

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

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

17. An apparatus for receiving acknowledgement, ACK, information of semi-persistent scheduling, SPS, data packets, comprising;

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

a receiving unit, adapted to receive N ACKs/NAKs fed back by the UE, among which the positions from the (N−

k+1)th ACK/NAK to the N^th ACK/NAK are used for mapping k SPS data packets of the downlink data packets.

18. The apparatus of claim 17, wherein when the receiving unit receives a feedback NAK, the sending unit is further adapted to transmit one more SPS activation signaling at the next time of semi-persistent transmission, or transmit one more SPS activation signaling at the time of SPS retransmission, where the retransmitted signaling is the same as or different from the SPS activation signaling.