Terminal, base station, communication system, and communication method

Abstract

Provided is a terminal that performs communication with a base station, in which a Physical Uplink Control Channel is generated by mapping response information to a Physical Uplink Control Channel resource that is determined in accordance with at least a prescribed offset and generates a Physical Uplink Control Channel, in a case where a Physical Downlink Control Channel is detected in a first Enhanced Physical Downlink Control Channel-Physical Resource Block set, and in which a Physical Uplink Control Channel is generated by mapping the response information to a Physical Uplink Control Channel resource that is determined in accordance with at least an offset which is configured individually for every terminal and generates the Physical Uplink Control Channel, in a case where the Physical Downlink Control Channel is detected in a second Enhanced Physical Downlink Control Channel-Physical Resource Block set.

1 . A terminal communicating with a base station in a cell, the terminal comprising:
 a downlink control channel detection module that monitors an physical downlink control channel in a first physical downlink control channel-physical resource block set and a second physical downlink control channel-physical resource block set;   a data extraction module that extracts transmission data in a physical downlink shared channel associated with a detected physical downlink control channel, in a case where the downlink control channel detection module detects the physical downlink control channel;   a response information generation module that generates response information responding to the extracted transmission data;   an uplink control channel generation module that generates a physical uplink control channel by mapping the response information to a physical uplink control channel resource that is determined in accordance at least with an index of an element that constructs a physical downlink control channel resource in which the physical downlink control channel is detected and with a prescribed offset, in a case where the downlink control channel detection module detects the physical downlink control channel in the first physical downlink control channel-physical resource block set, and that generates the physical uplink control channel by mapping the response information to a physical uplink control channel resource that is determined in accordance at least with the index of the element that constructs the physical downlink control channel resource in which the physical downlink control channel is detected and with an offset which is configured by dedicated RRC signaling, in a case where the downlink control channel detection module detects the physical downlink control channel in the second physical downlink control channel-physical resource block set; and   a response transmission module that transmits a signal that includes the physical uplink control channel.   
     
     
         2 . The terminal according to  claim 1 ,
 wherein a search space in the first physical downlink control channel-physical resource block set is a search space in which the physical downlink control channel added with a CRC scrambled by a paging identifier is monitored, and   wherein a search space in the second physical downlink control channel-physical resource block set is a search space in which the physical downlink control channel added with the CRC scrambled by the paging identifier is not monitored.   
     
     
         3 . The terminal according to  claim 1 ,
 wherein the prescribed offset is an offset that is determined based on system information.   
     
     
         4 . The terminal according to  claim 1 ,
 wherein the prescribed offset is an offset that is determined based on a physical cell identifier of the cell.   
     
     
         5 . A base station communicating with a terminal in a cell, the base station comprising:
 a physical control information notification module that sends the terminal an physical downlink control channel arranging the physical downlink control channel in a first physical downlink control channel-physical resource block set or a second physical downlink control channel-physical resource block set; and   a response information reception module that extracts a physical uplink control channel to which response information responding to transmission data in a physical downlink shared channel associated with a physical downlink control channel is mapped, in a physical uplink control channel resource that is determined in accordance at least with an index of an element which constructs an physical downlink control channel resource in which the physical downlink control channel is arranged and with a prescribed offset, in a case where the physical control information notification module sends the terminal the physical downlink control channel arranging the physical downlink control channel in the first physical downlink control channel-physical resource block set, and that extracts the physical uplink control channel to which the response information responding to the transmission data in the physical downlink shared channel associated with the physical downlink control channel is mapped, in a physical uplink control channel resource that is determined in accordance at least with the index of the element which constructs the physical downlink control channel resource in which the physical downlink control channel is arranged and with an offset that is configured by dedicated RRC signaling, in a case where the physical control information notification module sends the terminal the physical downlink control channel arranging the physical downlink control channel in the second physical downlink control channel-physical resource block set.   
     
     
         6 . The base station according to  claim 5 ,
 wherein a search space in the first physical downlink control channel-physical resource block set is a search space in which the physical downlink control channel added with a CRC scrambled by a paging identifier is monitored, and   wherein a search space in the second physical downlink control channel-physical resource block set is a search space in which the physical downlink control channel added with the CRC scrambled by the paging identifier is not monitored.   
     
     
         7 . The base station according to  claim 6 ,
 wherein the prescribed offset is an offset that is determined based on system information.   
     
     
         8 . The base station according to  claim 5 ,
 wherein the prescribed offset is an offset that is determined based on a physical cell identifier of the cell.   
     
     
         9 . (canceled) 
     
     
         10 . A communication method for use in a terminal communicating with a base station in a cell, the communication method comprising:
 a step of monitoring an physical downlink control channel in a first physical downlink control channel-physical resource block set and a second physical downlink control channel-physical resource block set;   a step of extracting transmission data in a physical downlink shared channel associated with a detected physical downlink control channel, in a case where the physical downlink control channel is detected;   a step of generating response information responding to the extracted transmission data;   a step of generating a physical uplink control channel by mapping the response information to a physical uplink control channel resource that is determined in accordance at least with an index of an element that constructs a physical downlink control channel resource in which the physical downlink control channel is detected and with a prescribed offset, in a case where the physical downlink control channel is detected in the first physical downlink control channel-physical resource block set, and generating the physical uplink control channel by mapping the response information to a physical uplink control channel resource that is determined in accordance at least with the index of the element that constructs the physical downlink control channel resource in which the physical downlink control channel is detected and with an offset which is configured by dedicated RRC signaling, in a case where the physical downlink control channel is detected in the second physical downlink control channel-physical resource block set; and   a step of transmitting a signal that includes the physical uplink control channel.   
     
     
         11 . A communication method for use in a base station communicating with a terminal in a cell, the communication method comprising:
 a step of sending the terminal an physical downlink control channel by arranging the physical downlink control channel in a first physical downlink control channel-physical resource block set or a second physical downlink control channel-physical resource block set; and   a step of extracting a physical uplink control channel to which response information responding to transmission data in a physical downlink shared channel associated with a physical downlink control channel is mapped, in a physical uplink control channel resource that is determined in accordance at least with an index of an element which constructs an physical downlink control channel resource in which the physical downlink control channel is arranged and with a prescribed offset, in a case where the physical downlink control channel is sent to the terminal being arranged in the first physical downlink control channel-physical resource block set, and of extracting the physical uplink control channel to which the response information responding to the transmission data in the physical downlink shared channel associated with the physical downlink control channel is mapped, in a physical uplink control channel resource that is determined in accordance at least with the index of the element which constructs the physical downlink control channel resource in which the physical downlink control channel is arranged and with an offset that is configured by dedicated RRC signaling, in a case where the physical downlink control channel is sent to the terminal being arranged in the second physical downlink control channel-physical resource block set.