HARQ-ACK signal transmission in response to detection of control channel type in case of multiple control channel types

• US 9,271,271 B2
• Filed: 03/05/2013
• Issued: 02/23/2016
• Est. Priority Date: 03/05/2012
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Papasakellariou, Aris, Cho, Joon-Young
• Primary Examiner(s): Rinehart, Mark
• Assistant Examiner(s): Dewan, Sanjay K
• Application Number:
  US13/785,769
• Publication Number:
  US 20130230030A1
• Time in Patent Office: 1,085 Days
• Field of Search: 370/336, 370/330
• US Class Current: 1/1
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04L 1/1896 ARQ related signaling
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

Methods and apparatus are described for a User Equipment (UE) to transmit and for a base station to receive a Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK) signal in a resource of a Physical Uplink Control CHannel (PUCCH). The HARQ-ACK signal is transmitted from the UE in response to a detection of a PDCCH transmitted from the base station and conveying a DCI format that, depending on the PDCCH type, can include a HARQ-ACK PUCCH Resource Offset (HPRO) information field. The UE and the NodeB determine the PUCCH resource depending on the PDCCH type and, if the DCI format includes the HPRO, also depending on a PDCCH transmission type.

Claims

1. A method of a user equipment (UE) for transmitting a hybrid automatic repeat request acknowledgement (HARQ-ACK) signal on a physical uplink control channel (PUCCH), the method comprising:

receiving, by the UE, first downlink control information (DCI) on a first physical downlink control channel (PDCCH) using first control channel elements (CCEs) of a first type, or second DCI on a second PDCCH using second CCEs of a second type, wherein the first DCI comprises information fields, and wherein the second DCI comprises the information fields of the first DCI and further comprises a HARQ-ACK PUCCH resource offset (HPRO) information field;

determining, by the UE, a first PUCCH resource, n_PUCCH, as n_PUCCH=n_CCE+N_PUCCH, if the UE receives the first DCI on the first PDCCH, wherein n_CCE is a first CCE index of the first CCEs used for the first DCI, and N_PUCCH is a first offset assigned to the UE from a base station;

determining, by the UE, a second PUCCH resource, n_PUCCH2, as n_PUCCH2=n_ECCE+f(HPRO)+N_PUCCH^E, if the UE receives the second DCI on the second PDCCH, wherein n_ECCE is a first CCE index of the second CCEs used for the second DCI, f(HPRO) is a mapping function that provides an integer based on the HPRO information field, and N_PUCCH^E is a second offset assigned to the UE from the base station; and

transmitting, by the UE, the HARQ-ACK signal, associated with the first or second DCI, based on the determined first or second PUCCH resource.

2. The method of claim 1, wherein the HPRO information field comprises two bits.

3. The method of claim 1, if a minimum number of the first or second CCEs used by the base station to transmit the first or second PDCCH in a transmission time interval (TTI) is two, the first or second PUCCH resource is determined by replacing n_ECCE with └

n_ECCE/2┘

, where └

┘

denotes a ‘

floor’

function that rounds a number to its immediately lower integer.

4. The method of claim 1, wherein first PUCCH resources corresponding to the first PDCCH at least partially overlap second PUCCH resources corresponding to the second PDCCH.

5. The method of claim 4, wherein collisions among the first PUCCH resources corresponding to the first PDCCH and the second PUCCH resources corresponding to the second PDCCH are avoided through the use of the HPRO information field.

6. The method of claim 1, wherein, if the UE detects the second PDCCH and the HARQ-ACK signal is transmitted from two antennas, a first antenna uses the second PUCCH resource, n_PUCCH2, and a second antenna uses a third PUCCH resource determined as n_PUCCH3=n_ECCE+1+f(HPRO)+N_PUCCH^E.

7. The method of claim 1, wherein a number of the first CCEs is different than a number of the second CCEs.

8. The method of claim 1, wherein the first DCI and the second DCI comprise cyclic redundancy check (CRC) bits that are scrambled with a same type of a radio network temporary identifier (RNTI).

9. A method of a base station for receiving a hybrid automatic repeat request acknowledgement (HARQ-ACK) signal in a physical uplink control channel (PUCCH), the method comprising:

transmitting, by the base station, first downlink control information (DCI) on a first physical downlink control channel (PDCCH) using first control channel elements (CCEs) of a first type, or second DCI on a second PDCCH using second CCEs of a second type, wherein the first DCI comprises information fields, and wherein the second DCI comprises the information fields of the first DCI and further comprises a HARQ-ACK PUCCH resource offset (HPRO) information field;

determining, by the base station, a first PUCCH resource, n_PUCCH, as n_PUCCH=n_CCE+N_PUCCH, if the base station transmits the first DCI on the first PDCCH, wherein n_CCE is a first CCE index of the first CCEs used for the first DCI, and N_PUCCH is a first offset;

determining, by the base station, a second PUCCH resource, n_PUCCH2, as n_PUCCH2=n_ECCE+f(HPRO)+N_PUCCH^E, if the base station transmits the second DCI on the second PDCCH, wherein n_ECCE is a first CCE index of the second CCEs used for the second DCI, f(HPRO) is a mapping function that provides an integer based on the HPRO information field, and N_PUCCH^E is a second offset; and

receiving, by the base station, the HARQ-ACK signal associated with the first or second DCI based on the determined first or second PUCCH resource.

10. The method of claim 9, wherein the HPRO information field comprises two elements.

11. The method if claim 9, wherein, if a minimum number of the first or second CCEs used by the base station to transmit the first or second PDCCH in a transmission time interval (TTI) is two, the first or second PUCCH resource is determined by replacing n_ECCE with └

n_ECCE/2┘

where └

┘

denotes a ‘

floor’

function that rounds a number to its immediately lower integer.

12. The method of claim 9, wherein first PUCCH resources corresponding to the first PDCCH at least partially overlap with second PUCCH resources corresponding to the second PDCCH.

13. The method of claim 12, wherein collisions among the first PUCCH resources corresponding to the first PDCCH and the second PUCCH resources corresponding to the second PDCCH are avoided through the use of the HPRO field.

14. The method of claim 9, wherein, if the base station transmits the second PDCCH and the HARQ-ACK signal is transmitted from two antennas, the second PUCCH resource is used in reception from a first antenna, and a third PUCCH resource is used in reception from a second antenna, wherein the third PUCCH resource is determined as n_PUCCH3=n_ECCE+f(HPRO)+N_PUCCH^E.

15. The method of claim 9, wherein a number of the first CCEs is different than a number of the second CCEs.

16. The method of claim 9, wherein the first DCI and the second DCI include cyclic redundancy check (CRC) bits that are scrambled with a same type of a radio network temporary identifier (RNTI).

17. A user equipment (UE) apparatus for transmitting a hybrid automatic repeat request acknowledgement (HARQ-ACK) signal in a physical uplink control channel (PUCCH), the apparatus comprising:

a receiver configured to receive first downlink control information (DCI) on a first physical downlink control channel (PDCCH) using first control channel elements (CCEs) of a first type, or second DCI on a second PDCCH using second CCEs of a second type, wherein the first DCI comprises information fields, wherein the second DCI comprises the information fields of the first DCI and further comprises a HARQ-ACK PUCCH resource offset (HPRO) information field, and wherein the receiver is further configured to receive a first offset and a second offset;

a processor configured to determine a first PUCCH resource, n_PUCCH, as n_PUCCH=n_CCE+N_PUCCH, if the UE apparatus receives the first DCI on the first PDCCH, wherein n_CCE is a first CCE index of the first CCEs used for the first DCI, and N_PUCCH is the first offset, and configured to determine a second PUCCH resource n_PUCCH2, as n_PUCCH2=n_ECCE f(HPRO)+N_PUCCH^E, if the UE apparatus receives the second DCI on the second PDCCH, wherein n_ECCE is a first CCE index of the second CCEs used for the second DCI, f(HPRO) is a mapping function that provides an integer based on the HPRO information field, and N_PUCCH^E is the second offset; and

a transmitter for transmitting the HARQ-ACK signal associated with the first or second DCI based on the determined first or second PUCCH resource.

18. The apparatus of claim 17, wherein the HPRO information field comprises two elements.

19. The apparatus of claim 17, wherein, if a minimum number of the first or second CCEs used to transmit the first or second PDCCH in a transmission time interval (TTI) is two, the first or second PUCCH resource is determined by replacing n_ECCE with └

n_ECCE/2┘

, where └

┘

denotes a ‘

floor’

function that rounds a number to its immediately lower integer.

20. The apparatus of claim 17, wherein first PUCCH resources corresponding to the first PDCCH at least partially overlap second PUCCH resources corresponding to the second PDCCH.

21. The apparatus of claim 17, wherein collisions among the first PUCCH resources corresponding to the first PDCCH and the second PUCCH resources corresponding to the second PDCCH are avoided through the use of the HPRO information field.

22. The apparatus of claim 17, wherein, if the HARQ-ACK is transmitted from two antennas and in response to a detection of the second PDCCH, a first antenna uses the second PUCCH resource, and a second antenna uses a third PUCCH resource determined as n_PUCCH3=n_ECCE+1+f(HPRO)+N_PUCCH^E.

23. The apparatus of claim 17, wherein a number of the first CCEs is different than a number of the second CCEs.

24. The apparatus of claim 17, wherein the first DCI and the second DCI comprise cyclic redundancy check (CRC) bits that are scrambled with a same type of a radio network temporary identifier (RNTI).

25. A base station apparatus for receiving a hybrid automatic repeat request acknowledgement (HARQ-ACK) signal in a physical uplink control channel (PUCCH), the apparatus comprising:

a transmitter configured to transmit a first offset and a second offset, and configured to transmit first downlink control information (DCI) on a first physical downlink control channel (PDCCH) using first control channel elements (CCEs) or second DCI on a second PDCCH using second CCEs, wherein the first DCI comprises information fields and the second DCI comprises the information fields of the first DCI and further comprises a HARQ-ACK PUCCH resource offset (HPRO) information field;

a processor configured to determine a first PUCCH resource, n_PUCCH, as n_PUCCH=n_CCE+N_PUCCH, if the base station apparatus transmits the first DCI on the first PDCCH, wherein n_CCE is a first CCE index of the first CCEs used for the first DCI, and N_PUCCH is the first offset, and configured to determine a second PUCCH resource, n_PUCCH2, as n_PUCCH2=n_ECCE+f(HPRO)+N_PUCCH^E, if the base station apparatus transmits the second DCI on the second PDCCH, wherein n_ECCE is a first CCE index of the second CCEs used for the second DCI, f(HPRO) is a mapping function that provides an integer based on the HPRO information field, and N_PUCCH^E is the second offset; and

a receiver configured to receive the HARQ-ACK signal associated with the first or second DCI based on the determined first or second PUCCH resource.

26. The apparatus of claim 25, wherein the HPRO information field comprises two elements.

27. The apparatus of claim 25, wherein, if a minimum number of the first or second CCEs used to transmit the first or second PDCCH in the transmission time interval (TTI) is two, the first or second PUCCH resource is determined by replacing n_ECCE with └

n_ECCE/2┘

, where └

┘

denotes a ‘

floor’

function that rounds a number to its immediately lower integer.

28. The apparatus of claim 25, wherein first PUCCH resources corresponding to the first PDCCH at least partially overlap with second PUCCH resources corresponding to the second PDCCH.

29. The apparatus of claim 28, wherein collisions among the first PUCCH resources corresponding to the first PDCCH and the second PUCCH resources corresponding to the second PDCCH are avoided through the use of the HPRO information field.

30. The apparatus of claim 27, wherein, if the HARQ-ACK signal is transmitted from two antennas and in response to a detection of the second PDCCH, the second PUCCH resource is used in reception from a first antenna, and a third PUCCH resource is used in reception from a second antenna, where the third PUCCH resource is determined as n_PUCCH3=n_ECCE+1+f(HPRO)+N_PUCCH^E.

31. The apparatus of claim 27, wherein a number of the first CCEs is different than a number of the second CCEs.

32. The apparatus of claim 27, wherein the first DCI and the second DCI include cyclic redundancy check (CRC) bits that are scrambled with a same type of a radio network temporary identifier (RNTI).