Base station, user equipment, and methods for communicating transmission time interval control information

1 . A method performed by user equipment (UE) in a communication system, the method comprising:

receiving from a base station system information indicating a specific frequency region for control information including time domain resource assignment information, wherein the specific frequency region is contained within a part of an entire bandwidth in a frequency domain;

receiving, from a base station, control information on the specific frequency region, wherein the time domain resource assignment information indicates a transmission time interval for a physical downlink shared channel (PDSCH) among a plurality of transmission time intervals;

identifying a transport block size associated with a number of symbols; and

receiving, from the base station, the PDSCH associated with the transport block size in the number of symbols from a start symbol based on the time domain resource assignment information,

wherein the time domain resource assignment information indicates the start symbol of the transmission time interval,

wherein the transmission time interval is defined based on the number of symbols from the start symbol,

wherein a frequency region for transmission of the PDSCH in the transmission time interval is defined by the specific frequency region for the control information, in the frequency domain, and

wherein the specific frequency region depends on a subcarrier spacing (SCS).

2 . The method of claim 1 ,

wherein the number of symbols of the transmission time interval is identified based on the time domain resource assignment information.

3 . The method of claim 1 ,

wherein the plurality of transmission time intervals comprises at least a transmission time interval of 2 symbols and a transmission time interval of 7 symbols.

4 . A method performed by a base station in a communication system, the method comprising:

transmitting to a user equipment (UE), system information indicating a specific frequency region for control information including time domain resource assignment information, wherein the specific frequency region is contained within a part of an entire bandwidth in a frequency domain;

identifying a transport block size;

transmitting, to the UE, control information on the specific frequency region, wherein the time domain resource assignment information indicates a transmission time interval for a physical downlink shared channel (PDSCH) among a plurality of transmission time intervals; and

transmitting, to the UE, the PDSCH associated with the transport block size in the number of symbols from a start symbol according to the time domain resource assignment information,

wherein the transport block size is associated with the number of symbols,

wherein the time domain resource assignment information indicates the start symbol of the transmission time interval,

wherein the transmission time interval is defined based on the number of symbols from the start symbol,

wherein a frequency region for transmission of the PDSCH in the transmission time interval is defined by the specific frequency region for the control information, in the frequency domain, and

wherein the specific frequency region depends on a subcarrier spacing (SCS).

5 . The method of claim 4 ,

wherein the number of symbols of the transmission time interval is identified based on the time domain resource assignment information.

6 . The method of claim 4 ,

wherein the plurality of transmission time intervals comprises at least a transmission time interval of 2 symbols and a transmission time interval of 7 symbols.

7 . A user equipment (UE) in a communication system, the UE comprising:

a transceiver; and

at least one processor configured to:

receive from a base station system information indicating a specific frequency region for control information including time domain resource assignment information, wherein the specific frequency region is contained within a part of an entire bandwidth in a frequency domain;

receive, from a base station, control information on the specific frequency region, wherein the time domain resource assignment information indicates a transmission time interval for a physical downlink shared channel (PDSCH) among a plurality of transmission time intervals;

identify a transport block size associated with a number of symbols; and

receive, from the base station, the PDSCH associated with the transport block size in the number of symbols from a start symbol based on the time domain resource assignment information;

wherein the time domain resource assignment information indicates the start symbol of the transmission time interval,

wherein the transmission time interval is defined based on the number of symbols from the start symbol,

wherein a frequency region for transmission of the PDSCH in the transmission time interval is defined by the specific frequency region for the control information, in the frequency domain, and

wherein the specific frequency region depends on a subcarrier spacing (SCS).

8 . The UE of claim 7 ,

wherein the number of symbols of the transmission time interval is identified based on the time domain resource assignment information.

9 . The UE of claim 7 ,

wherein the plurality of transmission time intervals comprises at least a transmission time interval of 2 symbols and a transmission time interval of 7 symbols.

10 . A base station in a communication system, the base station comprising:

a transceiver; and

at least one processor configured to:

identify a transport block size;

transmit, to a user equipment (UE), system information indicating a specific frequency region for control information including time domain resource assignment information, wherein the specific frequency region is contained within a part of an entire bandwidth in a frequency domain,

transmit, to the UE, control information on the specific frequency region, wherein the time domain resource assignment information indicates a transmission time interval for a physical downlink shared channel (PDSCH) among a plurality of transmission time intervals; and

transmit, to the UE, the PDSCH associated with the transport block size in the number of symbols from a start symbol according to the time domain resource assignment information,

wherein the transport block size is associated with the number of symbols,

wherein the time domain resource assignment information indicates the start symbol of the transmission time interval,

wherein the transmission time interval is defined based on the number of symbols from the start symbol,

wherein a frequency region for transmission of the PDSCH in the transmission time interval is defined by the specific frequency region for the control information, in the frequency domain, and

wherein the specific frequency region depends on a subcarrier spacing (SCS).

11 . The base station of claim 10 ,

wherein the number of symbols of the transmission time interval is identified based on the time domain resource assignment information.

12 . The base station of claim 10 ,

wherein the plurality of transmission time intervals comprises at least a transmission time interval of 2 symbols and a transmission time interval of 7 symbols.