Method for transmitting ACK/NACK signals, and base station and user equipment for the method

Abstract

According to one aspect of the present invention, values which are specifically defined for each user equipment are reflected when resource allocation/mapping of downlink/uplink ACK/NACK channels is performed, so as to vary uplink/downlink ACK/NACK information transmitting resources for each user equipment allocated to the same downlink/uplink resource. According to another aspect of the present invention, nodes for transmitting uplink/downlink ACK/NACK information vary for each user equipment allocated to the same downlink/uplink resource. According to the present invention, even when downlink/uplink signals for a plurality of user equipment are transmitted from the same resource, uplink/downlink ACK/NACK signals of the plurality of user equipment are transmitted from different resources, thereby reducing interferences among ACK/NACK signals of the plurality of user equipment.

The invention claimed is: 
     
       1. A method of transmitting, by a base station controlling at least one of a plurality of nodes, a ACKnowledgement/Negative-ACKnowledgement an acknowledgement/negative-acknowledgement (ACK/NACK) signal to a user equipment being capable of simultaneously receiving signals from the plurality of nodes, the method comprising:
 allocating a resource to an ACK/NACK channel carrying the ACK/NACK signal using an offset n DL   offset  specific to the user equipment; and 
 transmitting the ACK/NACK channel on the resource, 
 wherein the offset n DL   offset  is a value decided determined based on at least one from among of:  
 a value defined by an upper layer with respect to the user equipment, an identifier of a node used in uplink transmission in response to which the ACK/NACK signal is transmitted, a type of the node used in the uplink transmission, an identifier of a node to be used in transmission of the ACK/NACK signal, 
 a type of the node used in the transmission of the ACK/NACK signal, 
 a pattern index of a reference signal allocated to the user equipment, or a multiplexing sequence of a resource used in the uplink transmission, 
 wherein, based on the ACK/NACK channel being a hybrid automatic retransmission request feedback A-MAP (HF-A-MAP) channel in the HF-A-MAP region, a resource index of the HF-A-MAP channel satisfies the following: k=(M(j)+n+n offset   DL )mod N HF-A-MAP , and 
 wherein N HF-A-MAP  denotes a total number of HF-A-MAP channels configured per HF-A-MAP region, and j denotes a HF-A-MAP index parameter in a non-user specific A-MAP IE. 
 
     
     
       2. The method according to of  claim 1 ,
 wherein the ACK/NACK channel is a Physical Hybrid physical hybrid automatic retransmit request Indicator Channel (PHICH), indicator channel (PHICH):  
 a PHICH group number, to which the PHICH belongs, is decided according to satisfies the followingequation,: 
   n PHICH   group =(I PRB_RA   lowest_index +n DMRS +n offset   DL )mod N PHICH   group +I PHICH N PHICH   group ,  
 
 
       and/or an orthogonal sequence index applied to the PHICH is decided according to satisfies the followingequation,: 
   n PHICH   seq =(└I PRB_RA   lowest_index /N PHICH   group ┘+n DMRS +n offset   DL )mod 2N SF   group , and 
 
   where, I lowest_index   PRB_RA  indicates a minimum Physical Resource Block   wherein I lowest_index   PRB_RA  denotes a minimum physical resource block (PRB) index in a first slot used in the uplink transmission, I PHICH  is set to 1 for a time division duplex (TDD) uplink/downlink configuration 0 performing the uplink transmission at a subframe n=4 or 9 and to 0 for the other configurations, N group   PHICH  indicates thedenotes a number of PHICH groups configured by an upper layer, n DMRS  is a value indicatingdenotes a cyclic shift applied to a DeModulation Reference Signaldemodulation reference signal (DMRS) for the uplink transmission, and N PHICH   SF  indicatesdenotes a spreading factor used in PHICH modulation.   
     
     
       3. The method according to  claim 1 , wherein
 the ACK/NACK channel is a Hybrid automatic retransmission request Feedback A-MAP (HF-A-MAP) channel in an HF-A-MAP region, and   a resource index of the HF-A-MAP channel is decided according to the following equation,
   k=(M((j)+n+n offset   DL )mod N HF-A-MAP    
   where, N HF-A-MAP  indicates a total number of HF-A-MAP channels configured per HF-A-MAP region, and j indicates an HF-A-MAP index parameter in a non-user specific A-MAP IE.   
     
     
       4. A base station for transmitting an ACKnowledgement/Negative-ACKnowledgement acknowledgement/negative-acknowledgement (ACK/NACK) signal to a user equipment being capable of simultaneously receiving signals from a plurality of nodes, wherein the base station controls at least one of the plurality of nodes, the base station comprising:
 a processor configured to allocate a resource to an ACK/NACK channel carrying the ACK/NACK signal using an offset n DL   offset  specific to the user equipment; and 
 a transmitter configured to transmit the ACK/NACK channel on the resource under control of the processor, 
 wherein the offset n pL   offset  is a value decided based on at least one from among a value defined by an upper layer with respect to the user equipment, an identifier of a node used in uplink transmission in response to which the ACK/NACK signal is transmitted, a type of the node used in the uplink transmission, an identifier of a node to be used in transmission of the ACK/NACK signal, a type of the node used in the transmission of the ACK/NACK signal, a pattern index of a reference signal allocated to the user equipment, or a multiplexing sequence of a resource used in the uplink transmission. 
 a transmitter; 
 a receiver; and 
 at least one processor coupled with the transmitter and receiver, 
 wherein the at least one processor is configured to: 
 allocating a resource to an ACK/NACK channel carrying the ACK/NACK signal using an offset n DL   offset  specific to the user equipment; and 
 transmitting the ACK/NACK channel on the resource, 
 wherein the offset n DL   offset  is a value determined based on at least one from among a value defined by an upper layer with respect to the user equipment, 
 an identifier of a node used in uplink transmission in response to which the ACK/NACK signal is transmitted, 
 a type of the node used in the uplink transmission, 
 an identifier of a node to be used in transmission of the ACK/NACK signal, 
 a type of the node used in the transmission of the ACK/NACK signal, 
 a pattern index of a reference signal allocated to the user equipment, or 
 a multiplexing sequence of a resource used in the uplink transmission, 
 wherein, based on the ACK/NACK channel being a hybrid automatic retransmission request feedback A-MAP (HF-A-MAP) channel in the HF-A-MAP region, a resource index of the HF-A-MAP channel satisfies the following:
   k=(M(j)+n+n offset   DL )mod N HF-A-MAP , and 
 
 wherein N HF-A-MAP  denotes a total number of HF-A-MAP channels configured per HF-A-MAP region, and j denotes a HF-A-MAP index parameter in a non-user specific A-MAP IE. 
 
     
     
       5. The base station according to of  claim 4 , wherein
 the ACK/NACK channel is a Physical Hybrid automatic retransmit request Indicator Channel (PHICH), and 
 the processor is configured so that 
 a PHICH group number, to which the PHICH belongs, is decided according to the following equation,
   n PHICH   group =(I PRB_RA   lowest_index +n DMRS +n offset   DL )mod N PHICH   group +I PHICH N PHICH   group    
 
 
       and/or
 an orthogonal sequence index applied to the PHICH is decided according to the following equation,
   n PHICH   seq =(└I PRB_RA   lowest_index /N PHICH   group ┘+n DMRS +n offset   DL )mod 2N SF   group  
 
 
 where, I lowest_index   PRB_RA  indicates a minimum Physical Resource Block (PRB) index in a first slot used in the uplink transmission, I PHICH  is set to 1 for a time division duplex (TDD) uplink/downlink configuration 0 performing the uplink transmission at a subframe n=4 or 9 and to 0 for the other configurations, N group   PHICH  indicates the number of PHICH groups configured by an upper layer, n DMRS  is a value indicating a cyclic shift applied to a DeModulation Reference Signal (DMRS) for the uplink transmission, and N PHICH   SF  indicates a spreading factor used in PHICH modulation. 
 wherein, based on the ACK/NACK channel being a physical hybrid automatic retransmit request indicator channel (PHICH): 
 a PHICH group number, to which the PHICH belongs, is decided according to the following:
   n PHICH   group =(I PRB_RA   lowest_index +n DMRS +n offset   DL )mod N PHICH   group +I PHICH N PHICH   group    
 
 an orthogonal sequence index applied to the PHICH is decided according to the following:
   n PHICH   seql =(└I   PRB_RA   lowest_index /IN PHICH   group ┘+n DMRS +n offset   DL )mod 2N SF   group  
 
 
 
       wherein, I lowest_index   PRB_RA  indicates a minimum Physical Resource Block (PRB) index in a first slot used in the uplink transmission, I PHICH  is set to 1 for a time division duplex (TDD) uplink/downlink configuration 0 performing the uplink transmission at a subframe n=4 or 9 and to 0 for the other configurations, N group   PHICH  indicates the number of PHICH groups configured by an upper layer, n DMRS  is a value indicating a cyclic shift applied to a DeModulation Reference Signal (DMRS) for the uplink transmission, and N PHICH   SF  indicates a spreading factor used in PHICH modulation. 
     
     
       6. The base station according to  claim 4 , wherein
 the ACK/NACK channel is a Hybrid automatic retransmission request Feedback A-MAP (HF-A-MAP) channel in an HF-A-MAP region, and   the processor is configured so that a resource index of the HF-A-MAP channel is decided according to the following equation,
   k=(M(j)+n+n offset   DL )mod N HF-A-MAP    
   where, N HF-A-MAP  indicates a total number of HF-A-MAP channels configured per HF-A-MAP region, and j indicates an HF-A-MAP index parameter in a non-user specific A-MAP IE.   
     
     
       7. A method of transmitting, by a user equipment being capable of simultaneously receiving signals from a plurality of nodes, a ACKnowledgement/Negative-ACKnowledgement an acknowledgement/negative-acknowledgement (ACK/NACK) signal to a base station controlling at least one of the plurality of nodes, the method comprising:
 allocating a resource to an ACK/NACK channel carrying the ACK/NACK signal using an offset n UL   offset  specific to the user equipment; and 
 transmitting the ACK/NACK channel on the resource, 
 wherein the offset n UL   offset  is a value decided determined based on at least one from among of:  
 a value defined by an upper layer with respect to the user equipment, 
 an identifier of a node used in downlink transmission in response to which the ACK/NACK signal is transmitted, 
 a type of the node used in the downlink transmission, 
 an identifier of a node used in transmission of the ACK/NACK signal, 
 a type of the node used in the transmission of the ACK/NACK signal, 
 a pattern index of a reference signal allocated to the user equipment, or 
 a multiplexing sequence of a resource used in the downlink transmission, 
 wherein, based on the ACK/NACK channel being a physical uplink control channel (PUCCH), a resource, on which the PUCCH is transmitted, satisfies the following: n PUCCH   (1) =n CCE +N PUCCH   (1) +n offset   UL , and 
 wherein n CCE  denotes An index of a 1 st  control channel element (CCE) to which a PDCCH of the user equipment is allocated, and N (1)   PUCCH  denotes a system parameter decided by the upper layer. 
 
     
     
       8. The method according to  claim 7 , wherein
 the ACK/NACK channel is a Physical Uplink Control Channel (PUCCH), and   a resource, on which the PUCCH is transmitted, is decided according to the following equation,
   n PUCCH   (1) =n CCE +N PUCCH   (1) +n offset   UL    
   where, n CCE  is an index of a first Control Channel Element (CCE) to which a PDCCH of the user equipment is allocated, and N (1)   PUCCH  is a system parameter decided by the upper layer.   
     
     
       9. The method according to of  claim 7 ,
 wherein based on the ACK/NACK channel is being a Hybrid hybrid automatic retransmission request FeedBack CH feedback channel (HFBCH) in a feedback region, and:  
 a resource index of the HFBCH is decided according to satisfies the followingequation,: 
   k=(M(j)+n+n offset   UL )mod L HFB    
 
 where, L HFB  indicateswherein L HFB  denotes a total number of HARQ feedback channels configured per feedback region, and j indicatesdenotes an HFBCH index parameter of a non-user specific A-MAP IE. 
 
     
     
       10. A user equipment for transmitting an ACKnowledgement/Negative-ACKnowledgement being capable of simultaneously receiving signals from the plurality of nodes, an acknowledgement/negative-acknowledgement (ACK/NACK) signal to a base station controlling at least one of a plurality of nodes, wherein the user equipment simultaneously receives signals from the plurality of nodes, the user equipment comprising:
 a processor configured to allocate a resource to an ACK/NACK channel carrying the ACK/NACK signal using an offset n UL   offset  specific to the user equipment; and 
 a transmitter configured to transmit the ACK/NACK channel on the resource under control of the processor, 
 wherein the offset n UL   offset  is a value decided based on at least one from among a value defined by an upper layer with respect to the user equipment, an identifier of a node used in downlink transmission in response to which the ACK/NACK signal is transmitted, a type of the node used in the downlink transmission, an identifier of a node used in transmission of the ACK/NACK signal, a type of the node to used in the transmission of the ACK/NACK signal, a pattern index of a reference signal allocated to the user equipment, or a multiplexing sequence of a resource used in the downlink transmission. 
 a transmitter; 
 a receiver; and 
 at least one processor coupled with the transmitter and receiver, 
 wherein the at least one processor is configured to; 
 allocating a resource to an ACK/NACK channel carrying the ACK/NACK signal using an offset n UL   offset  specific to the user equipment; and 
 transmitting the ACK/NACK channel on the resource, 
 wherein the offset n UL   offset  is a value determined based on at least one of: 
 a value defined by an upper layer with respect to the user equipment, 
 an identifier of a node used in downlink transmission in response to which the ACK/NACK signal is transmitted, 
 a type of the node used in the downlink transmission, 
 an identifier of a node to be used in transmission of the ACK/NACK signal, 
 a type of the node used in the transmission of the ACK/NACK signal, 
 a pattern index of a reference signal allocated to the user equipment, or 
 a multiplexing sequence of a resource used in the downlink transmission, 
 based on the ACK/NACK channel being a physical uplink control channel (PUCCH): 
 wherein a resource, on which the PUCCH is transmitted, satisfies the following: n PUCCH   (1) =n CCE +N PUCCH   (1) +n offset   UL , and 
 wherein n CCE  denotes An index of a 1 st  control channel element (CCE) to which a PDCCH of the user equipment is allocated, and N (1)   PUCCH  denotes a system parameter decided by the upper layer. 
 
     
     
       11. The user equipment according to  claim 10 , wherein
 the ACK/NACK channel is a Physical Uplink Control Channel (PUCCH), and   the processor is configured so that a resource, on which the PUCCH is transmitted, is decided according to the following equation,
   n PUCCH   (1) =n CCE +N PUCCH   (1) +n offset   UL    
   where, n CCE  is an index of a first Control Channel Element (CCE) to which a PDCCH of the user equipment is allocated, and N (1)   PUCCH  is a system parameter decided by the upper layer.   
     
     
       12. The user equipment according to method of claim  10  7,
 wherein based on the ACK/NACK channel is being a Hybrid hybrid automatic retransmission request FeedBack CH feedback channel (HFBCH) in a feedback region, and 
 the processor is configured so that a resource index of the HFBCH is decided according to satisifes the followingequation,: 
   k=(M(j)+n+n offset   UL )mod L HFB    
 
 where, L HFB  indicates wherein L HFB  denotes a total number of HARQ feedback channels configured per feedback region, and j indicatesdenotes an HFBCH index parameter of a non-user specific A-MAP IE. 
 
     
     
       13. A method for a user equipment in a wireless communication system, the method comprising:
 receiving, by the user equipment, a physical downlink control channel (PDCCH) carrying downlink control information for a physical downlink shared channel (PDSCH); and   transmitting, by the user equipment, acknowledgement/negative acknowledgement (ACK/NACK) information for the PDSCH on a physical uplink control channel (PUCCH) resource,   wherein the PUCCH resource is determined based on an index of a 1 st  control channel element (CCE) in the PDCCH, a first PUCCH resource offset and a second PUCCH resource offset,   wherein the first PUCCH resource offset is configured by a higher layer parameter, and   wherein the second PUCCH resource offset is determined from an antenna port used for transmission of the PDCCH.   
     
     
       14. The method of claim 13,
 wherein the PUCCH resource n (1)   PUCCH  satisfies the following: n (1)   PUCCH =n CCE +N (1)   PUCCH +n offset   UL ,   wherein n CCE  is related to the index of the 1 st  CCE, N (1)   PUCCH  is related to the first PUCCH resource offset, and n UL   offset  is related to the second PUCCH resource offset.   
     
     
       15. The method of claim 13, wherein the second PUCCH resource offset is a user equipment specific value. 
     
     
       16. The method of claim 13, wherein the second PUCCH resource offset is obtained based on the PDCCH. 
     
     
       17. The method of claim 13, wherein the first PUCCH resource offset is a cell-specific value. 
     
     
       18. A user equipment in a wireless communication system, the user equipment comprising:
 a memory; and   at least one processor coupled with the memory,   wherein the at least one processor is configured to:
 receive a physical downlink control channel (PDCCH) carrying downlink control information for a physical downlink shared channel (PDSCH); and 
 transmit acknowledgement/negative acknowledgement (ACK/NACK) information for the PDSCH on a physical uplink control channel (PUCCH) resource, 
   wherein the PUCCH resource is determined based on an index of a 1 st  control channel element (CCE) in the PDCCH, a first PUCCH resource offset and a second PUCCH resource offset,   wherein the first PUCCH resource offset is configured by a higher layer parameter, and   wherein the second PUCCH resource offset is determined from an antenna port used for transmission of the PDCCH.   
     
     
       19. The user equipment of claim 18,
 wherein the PUCCH resource n (1)   PUCCH  satisfies the following: n (1)   PUCCH =n CCE +N (1)   PUCCH +n offset   UL ,   wherein n CCE  is related to the index of the 1 st  CCE, N (1)   PUCCH  is related to the first PUCCH resource offset, and n UL   offset  is related to the second PUCCH resource offset.   
     
     
       20. The user equipment of claim 18, wherein the second PUCCH resource offset is a user equipment specific value. 
     
     
       21. The user equipment of claim 18, wherein the second PUCCH resource offset is obtained based on the PDCCH. 
     
     
       22. The user equipment of claim 18, wherein the first PUCCH resource offset is a cell-specific value. 
     
     
       23. A method for a base station in a wireless communication system, the method comprising:
 transmitting, by the base station, a physical downlink control channel (PDCCH) carrying downlink control information for a physical downlink shared channel (PDSCH); and   receiving, by the base station, acknowledgement/negative acknowledgement (ACK/NACK) information for the PDSCH on a physical uplink control channel (PUCCH) resource,   wherein the PUCCH resource is determined based on an index of a 1 st  control channel element (CCE) in the PDCCH, a first PUCCH resource offset and a second PUCCH resource offset,   wherein the first PUCCH resource offset is configured by a higher layer parameter, and   wherein the second PUCCH resource offset is determined from an antenna port used for transmission of the PDCCH.   
     
     
       24. The method of claim 23, wherein the second PUCCH resource offset is a user equipment specific value. 
     
     
       25. The method of claim 23, wherein the second PUCCH resource offset is obtained based on the PDCCH. 
     
     
       26. The method of claim 23,
 wherein the PUCCH resource n (1)   PUCCH  satisfies the following: n (1)   PUCCH =n CCE +N (1)   PUCCH +n UL   offset,      where n CCE  is related to the index of the first CCE, N (1)   PUCCH  is related to the first PUCCH resource offset, and n UL   offset  is related to the second PUCCH resource offset.   
     
     
       27. A base station in a wireless communication system, the base station comprising:
 a memory; and   at least one processor coupled with the memory,   wherein the at least one processor is configured to:
 transmit a physical downlink control channel (PDCCH) carrying downlink control information for a physical downlink shared channel (PDSCH); and 
 receive acknowledgement/negative acknowledgement (ACK/NACK) information for the PDSCH on a physical uplink control channel (PUCCH) resource, 
   wherein the PUCCH resource is determined based on an index of a 1 st  control channel element (CCE) in the PDCCH, a first PUCCH resource offset and a second PUCCH resource offset,   wherein the first PUCCH resource offset is configured by a higher layer parameter, and   wherein the second PUCCH resource offset is determined from an antenna port used for transmission of the PDCCH.   
     
     
       28. The base station of claim 27, wherein the second PUCCH resource offset is a user equipment specific value. 
     
     
       29. The base station of claim 27, wherein the second PUCCH resource offset is obtained based on the PDCCH. 
     
     
       30. The base station of claim 27,
 wherein the PUCCH resource n (1)   PUCCH  satisfies the following: n (1)   PUCCH =n CCE +N (1)   PUCCH +n UL   offset,      wherein n CCE  is related to the index of the 1 st  CCE, N (1)   PUCCH  is related to the first PUCCH resource offset, and n UL   offset  is related to the second PUCCH resource offset.