Terminal and transmission method

Abstract

Provided is a terminal which can suitably transmit an uplink signal. In a terminal (100), a PC parameter control unit (104) sets a first power control parameter corresponding to a first service, when a prescribed condition relating to a control channel used for transmission of uplink signal allocation is met, and sets a second power control parameter corresponding to a second service, when the prescribed condition is not met. A transmission unit (109) transmits the uplink signal by using transmission power calculated by using the first power control parameter or the second power control parameter.

1 . A terminal comprising:
 a receiver, which, in operation, receives a control channel, which is used for transmission of assignment information for an uplink signal; and   circuitry, which, in operation, calculates a transmission power using a power control parameter that is dynamically configured according to a determined condition relating to the control channel in response to the received control channel including no SRS resource indicator (SRI) field; and   a transmitter, which, in operation, transmits the uplink signal using the calculated transmission power.   
     
     
         2 . The terminal according to  claim 1 , wherein the determined condition is that a payload size of a format to be used for the control channel is different from a determined size. 
     
     
         3 . The terminal according to  claim 1 , wherein the determined condition is that a payload size of a format to be used for the control channel is less than a determined size. 
     
     
         4 . The terminal according to  claim 1 , wherein the determined condition is that a scrambling sequence to be used for the control channel is different from a determined sequence. 
     
     
         5 . The terminal according to  claim 1 , wherein the determined condition is that the control channel is a control channel that is received at the terminal within a determined time period after a signal requesting scheduling of Ultra-Reliable and Low Latency Communications (URLLC) is transmitted from the terminal. 
     
     
         6 . The terminal according to  claim 1 , wherein the determined condition is that the control channel is a control channel that the terminal receives first after a signal requesting scheduling of Ultra-Reliable and Low Latency Communications (URLLC) is transmitted from the terminal. 
     
     
         7 . The terminal according to  claim 1 , wherein the determined condition is that the control channel indicates that a resource for use in an initial transmission of the uplink signal is a retransmission in a pre-configured transmission method. 
     
     
         8 . The terminal according to  claim 1 , wherein the determined condition is that a time period until the terminal transmits the uplink signal after the terminal receives the control channel is within a determined time. 
     
     
         9 . The terminal according to  claim 1 , wherein the determined condition is that a number of transmission symbols of the uplink signal indicated in the control channel is less than or equal to a determined value. 
     
     
         10 . The terminal according to  claim 1 , wherein the determined condition is that a detection period of the control channel in the terminal is less than or equal to a determined value. 
     
     
         11 . The terminal according to  claim 1 , wherein the determined condition is that a table indicating a coding and modulation scheme to be used in the control channel is different from a determined table. 
     
     
         12 . The terminal according to  claim 1 , wherein the determined condition is that a time period until the terminal transmits the uplink signal including a response signal to downlink data after the terminal receives the downlink data is within a determined time. 
     
     
         13 . The terminal according to  claim 1 , wherein at least two power control parameters are provided, and one of the at least two power control parameters is set according to the determined condition. 
     
     
         14 . The terminal according to  claim 1 , wherein the circuitry, in operation, calculates the transmission power using the power control parameter that is dynamically configured according to the determined condition relating to the control channel in response to the received control channel including no information indicating a service type. 
     
     
         15 . The terminal according to  claim 14 , wherein the service type includes one of Ultra-Reliable and Low Latency Communications (URLLC) and eMBB. 
     
     
         16 . A communication method comprising:
 receiving a control channel, which is used for transmission of assignment information for an uplink signal and which does not include SRS resource indicator (SRI) field and information indicating a service type;   calculating a transmission power using a power control parameter that is dynamically configured according to a determined condition relating to the control channel; and   transmitting the uplink signal using the calculated transmission power.