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

• US 8,565,182 B2
• Filed: 12/19/2012
• Issued: 10/22/2013
• 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:
  US13/720,915
• Publication Number:
  US 20130107842A1
• Time in Patent Office: 307 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

The application 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 includes receiving downlink data packets and an uplink data assignment indicator (UL DAI) from a base station (BS), wherein a value of the UL DAI indicates a number (N) of all scheduled downlink sub-frames which scheduled by the BS for the UE, the number N is greater than 1, and a number k (k<N) of the downlink data packets is/are semi-persistent scheduling (SPS) data packets; forming a feedback signal comprising N acknowledgements/negative acknowledgements (ACKs/NAKs) acknowledging the N downlink data packets, 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; and sending the feedback signal to the BS starting from the ACK/NAK at the first position.

Claims

1. A method for a user equipment (UE) to feed back acknowledgement information of semi-persistent scheduling (SPS) data packets, comprising:

receiving downlink data packets and an uplink data assignment indicator (UL DAI) from a base station (BS), wherein a value of the UL DAI indicates a number (N) of physical downlink shared channel (PDSCH) data packets which are scheduled by the BS for the UE, the number N is greater than 1, a number k (0<

k<

N) of the PDSCH data packets is/are SPS data packets, and wherein k and N are positive integers;

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

k+1)th to the Nth positions of the N ACKs/NAKs; and

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

2. The method of claim 1, further comprising:

placing N−

k ACKs/NAKs of non-SPS data packets of the N PDSCH data packets from the first position to the (N−

k)th 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 a value of the DL DAI indicates that a PDSCH data packet is an Mth non-SPS data packet of the N PDSCH data packets (M≦

N−

k); and

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 1, 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 k=1.

6. 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 the k SPS data packets of the N PDSCH data packets in a positive sequence or a negative sequence or according to an arrival sequence of the SPS data packets.

7. A user equipment (UE), comprising:

a receiver, configured to receive downlink data packets and an uplink data assignment indicator (UL DAI) from a base station (BS), wherein a value of the UL DAI indicates a number (N) of physical downlink shared channel (PDSCH) data packets which are scheduled by the BS for the UE, the number N is greater than 1, a number k (0<

k<

N) of the downlink data packets is/are semi-persistent scheduling (SPS) data packets, and wherein k and N are positive integers;

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

k+1)th to the Nth positions of the N ACKs/NAKs; and

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

8. The UE of claim 7, wherein the processor is further configured to place N−

k ACKs/NAKs of the N−

k non-SPS data packets of the N PDSCH data packets from the first position to the (N−

k)th position of the N ACKs/NAKs.

9. The UE of claim 8, wherein the receiver is further configured to receive a downlink data assignment indicator (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 N PDSCH data packets (M≦

N−

k);

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

10. The UE of claim 7, 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.

11. The UE of claim 7, wherein k=1.

12. The UE of claim 7, wherein the positions from the (N−

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

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

sending downlink data packets and an uplink data assignment indicator (UL DAI) to a user equipment (UE), wherein a value of the UL DAI indicates a number (N) of physical downlink shared channel (PDSCH) data packets which are scheduled by the BS for the UE, the number N is larger than 1, a number k (0<

k<

N) of the PDSCH data packets is/are SPS data packets, and wherein k and N are positive integers; and

receiving from the UE N acknowledgements/negative acknowledgements (ACKs/NAKs) starting from the first ACK/NAK at the first position, wherein k ACKs/NAKs of the k SPS data packets is/are placed from the (N−

k+1)th to the Nth positions of the N ACKs/NAKs.

14. The method of claim 13, further comprising:

transmitting a SPS activation signaling; and

transmitting, if receiving a feedback NAK, another SPS activation signaling at a next time of semi-persistent transmission, or transmitting another SPS activation signaling at a time of SPS retransmission, wherein the another SPS activation signaling is the same as or different from the SPS activation signaling.

15. The method of claim 13, wherein N−

k ACKs/NAKs of non-SPS data packets of the N PDSCH data packets is/are placed from the first position to the (N−

k)th position of the N ACKs/NAKs.

16. The method of claim 15, further comprising:

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

N−

k);

wherein the received feedback signal comprises N−

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

17. The method of claim 13, wherein k=1.

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

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

19. A base station, comprising:

a transmitter, configured to send downlink data packets and an uplink data assignment indicator (UL DAI) to a user equipment (UE), wherein a value of the UL DAI indicates a number (N) of physical downlink shared channel (PDSCH) data packets which are scheduled by the BS for the UE, the number N is larger than one, a number k (0<

k<

N) of the N PDSCH data packets is/are semi-persistent scheduling (SPS) data packets, and wherein k and N are positive integers; and

a receiver, configured to receive from the UE N acknowledgements/negative acknowledgements (ACKs/NAKs) starting from the first ACK/NAK at the first position, wherein k ACKs/NAKs of the k SPS data packets is/are placed from the (N−

k+1)th to the Nth positions of the N ACKs/NAKs.

20. The base station of claim 19, wherein the transmitter is further configured to transmit a SPS activation signaling, and, when the receiver receives a feedback NAK, transmit another SPS activation signaling at a next time of semi-persistent transmission, or transmit another SPS activation signaling at a time of SPS retransmission, wherein the another SPS activation signaling is the same as or different from the SPS activation signaling.

21. The base station of claim 19, wherein N−

k ACKs/NAKs of non-SPS data packets of the N PDSCH data packets is/are placed from the first position to the (N−

k)th position of the N ACKs/NAKs.

22. The base station of claim 21, wherein the transmitter is further configured to send a downlink data assignment indicator (DL DAI) to the UE, wherein a value of the DL DAI indicates that a PDSCH data packet is a Mth non-SPS data packet of the downlink data packets (M≦

N−

k); and

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.

23. The base station of claim 19, wherein k=1.

24. The base station of claim 19, wherein the positions from the (N−

k+1)th ACK/NAK to the Nth ACK/NAK are used for arranging the acknowledgement of the 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.

25. A computer program product comprising a non-transitory storage medium having stored thereon a computer program for use by a user equipment (UE), wherein the program comprises:

instructions for receiving downlink data packets and an uplink data assignment indicator (UL DAI) from a base station (BS), wherein a value of the UL DAI indicates a number (N) of physical downlink shared channel (PDSCH) data packets which are scheduled by the BS for the UE, the number N is greater than 1, a number k (0<

k<

N) of the N PDSCH data packets is/are semi-persistent scheduling (SPS) data packets, and wherein k and N are positive integers;

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 the (N−

k+1)th to the Nth positions of the N ACKs/NAKs; and

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

26. The computer program product of claim 25, wherein k=1.

27. The computer program product of claim 25, wherein N−

k ACKs/NAKs of non-SPS data packets of the N PDSCH data packets is/are placed from the first position to the (N−

k)th position of the N ACKs/NAKs.

28. A computer program product comprising a non-transitory storage medium having stored thereon a computer program for use by a base station (BS), wherein the program comprises:

instructions for sending downlink data packets and an uplink data assignment indicator (UL DAI) to a user equipment (UE), wherein a value of the UL DAI indicates a number (N) of physical downlink shared channel (PDSCH) data packets which are scheduled by the BS for the UE, the number N is larger than 1, wherein a number k (0<

k<

N) of the PDSCH data packets is/are semi-persistent scheduling (SPS) data packets, and wherein k and N are positive integers; and

instructions for receiving from the UE a feedback signal comprising N acknowledgements/negative acknowledgements (ACKs/NAKs) starting from the first ACK/NAK at the first position, wherein k ACKs/NAKs of the k SPS data packets is/are placed from the (N−

k+1)th to the Nth positions of the N ACKs/NAKs.

29. The computer program product of claim 28, wherein k=1.

30. The computer program product of claim 28, wherein N−

k ACKs/NAKs of non-SPS data packets of the N PDSCH data packets is/are placed from the first position to the (N−

k)th position of the N ACKs/NAKs.