Node and method for downlink scheduling and hybrid automatic repeat request timing

Abstract

Example embodiments presented herein are directed towards a base station, and corresponding method therein, for determining a control timing configuration. The control timing configuration provides a subframe timing for configuring PUSCH and uplink HARQ-ACK control timing for a cell serving a user equipment in a multiple cell communications network. The user equipment is served by a TDD based cell and a FDD based cell. Example embodiments are also directed towards a user equipment, and corresponding method therein, determining the control timing configuration discussed above.

What is claimed is: 
     
         1 . A method, in a base station, for determining a control timing configuration, the control timing configuration providing a subframe timing setting for configuring Physical Uplink Shared Channel, PUSCH, and uplink Hybrid Automatic Retransmission Request Acknowledgment, HARQ-ACK, control timing for a cell serving a user equipment in a multiple cell communications network, the user equipment being served by a Time Division Duplex, TDD, based cell, and a Frequency Division Duplex, FDD, based cell, the method comprising:
 determining a control timing configuration for a secondary cell, the secondary cell being one of the TDD based cell or the FDD based cell, based on a type of a scheduling cell, the type of the scheduling cell being one of the FDD based cell or the TDD based cell;   implementing the control timing configuration for PUSCH and uplink HARQ-ACK control timing for a cell serving the user equipment; and   if the cell serving the user equipment is a FDD based cell, the determining further comprising determining the control timing configuration for the PUSCH follows FDD timing.   
     
     
         2 . The method of  claim 1 , further comprising determining the control timing configuration comprises a transmission timing value of 4 for all subframes for a Physical Uplink Shared Channel, PUSCH. 
     
     
         3 . The method of  claim 1 , wherein the scheduling cell is the TDD based cell and the secondary cell is the FDD based cell, and wherein HARQ-ACK is transmitted on the secondary cell, the determining further comprising:
 determining the control timing configuration to be configuration number  0  if a configuration number of the scheduling cell is 0; and   if the configuration number of the scheduling cell is not 0, determining the control timing configuration to be a HARQ-ACK feedback timing value of 4 for a subframe in which a corresponding TDD subframe, for a same configuration number, is a downlink subframe.   
     
     
         4 . A base station for determining a control timing configuration, the control timing configuration providing a subframe timing setting for configuring Physical Uplink Shared Channel, PUSCH, and uplink Hybrid Automatic Retransmission Request Acknowledgment, HARQ-ACK, control timing for a cell serving a user equipment in a multiple cell communications network, the user equipment being served by a Time Division Duplex, TDD, based cell, and a Frequency Division Duplex, FDD, based cell, the base station comprising:
 processing circuitry configured to:
 determine a control timing configuration for a secondary cell, the secondary cell being one of TDD based cell or the FDD based cell, based on a type of a scheduling cell, the scheduling cell being one of the FDD based cell or the TDD based cell; and 
 said processing circuitry further configured to implement the control timing configuration for PUSCH and uplink HARQ-ACK control timing for a cell serving the user equipment; and 
 if the cell serving the user equipment is a FDD based cell, the control timing configuration for the PUSCH follows FDD timing. 
   
     
     
         5 . The base station of  claim 4 , wherein the processing circuitry further configured to determine the control timing configuration comprises a transmission timing value of 4 for all subframes for a Physical Uplink Shared Channel, PUSCH, wherein downlink subframes of the scheduling cell which map to downlink subframes of the secondary cell are excluded from PUSCH timing. 
     
     
         6 . The base station of  claim 4 , wherein the scheduling cell is the TDD based cell and the secondary cell is the FDD based cell, and wherein HARQ-ACK is transmitted on the secondary cell, the processing circuitry is further configured to determine the control timing configuration to be configuration number  0  if a configuration number of the scheduling cell is 0;
 and if the configuration number of the scheduling cell is not 0, the processing circuitry is further configured to determine the control timing configuration to be a HARQ-ACK feedback timing value of 4 for a subframe in which a corresponding TDD subframe, for a same configuration number, is a downlink subframe. 
 
     
     
         7 . A method, in a user equipment, for determining a control timing configuration, the control timing configuration providing a subframe timing setting for configuring Physical Uplink Shared Channel, PUSCH, and uplink Hybrid Automatic Retransmission Request Acknowledgment, HARQ-ACK, control timing for a cell serving the user equipment in a multiple cell communications network, the user equipment being served by a Time Division Duplex, TDD, based cell, and a Frequency Division Duplex, FDD, based cell, the method comprising:
 determining a control timing configuration for a secondary cell, the secondary cell being one of the TDD based cell or the FDD based cell, based on a type of a scheduling cell, the type of the scheduling cell being one of the FDD based cell or the TDD based cell; and   implementing the control timing configuration for PUSCH and uplink HARQ-ACK control timing for a cell serving the user equipment; and   if the cell serving the user equipment is a FDD based cell, the determining further comprising determining the control timing configuration for the PUSCH follows FDD timing.   
     
     
         8 . The method of  claim 7 , wherein the control timing configuration comprises a transmission timing value of 4 for all subframes for a Physical Uplink Shared Channel, PUSCH. 
     
     
         9 . The method of  claim 8 , wherein the scheduling cell is the TDD based cell and the secondary cell is the FDD based cell, and wherein HARQ-ACK is transmitted on the secondary cell, the determining further comprising:
 determining the control timing configuration to be configuration number  0  if a configuration number of the scheduling cell is 0; and   if the configuration number of the scheduling cell is not 0, determining the control timing configuration to be a HARQ-ACK feedback timing value of 4 for a subframe in which a corresponding TDD subframe, for a same configuration number, is a downlink subframe.   
     
     
         10 . A user equipment for determining a control timing configuration, the control timing configuration providing a subframe timing setting for configuring Physical Uplink Shared Channel, PUSCH, and uplink Hybrid Automatic Retransmission Request Acknowledgment, HARQ-ACK, control timing for a cell serving the user equipment in a multiple cell communications network, the user equipment being served by a Time Division Duplex, TDD, based cell, and a Frequency Division Duplex, FDD, based cell, the user equipment comprising:
 processing circuitry configured to:
 determine the control timing configuration for a secondary cell, the secondary cell being one of the TDD based cell or the FDD based cell, based on a type of a scheduling cell, the type of the scheduling cell being one of the FDD based cell or the TDD based cell; and 
 the processing circuitry further configured to implement the control timing configuration for PUSCH and uplink HARQ-ACK control timing for a cell serving the user equipment; and, 
 if the cell serving the user equipment is a FDD based cell, the determining further comprising determining the control timing configuration for the PUSCH follows FDD timing. 
   
     
     
         11 . The user equipment of  claim 10 , further configured to determine the control timing configuration comprises a transmission timing value of 4 for all subframes for a Physical Uplink Shared Channel, PUSCH. 
     
     
         12 . The user equipment of  claim 10 , wherein the scheduling cell is the TDD based cell and the secondary cell is the FDD based cell, and wherein HARQ-ACK is transmitted on the secondary cell, the processing circuitry is further configured to determine the control timing configuration to be configuration number  0  if a configuration number of the scheduling cell is 0; and if the configuration number of the scheduling cell is not 0, the processing circuitry is further configured to determine the control timing configuration to be a HARQ-ACK feedback timing value of 4 for a subframe in which a corresponding TDD subframe, for a same configuration number, is a downlink subframe.