Terminal devices, base station devices and communication methods
Terminal device receives a SS/PBCH block and a high-layer parameter and determines a point A. A common resource block is determined at least based on a subcarrier 0 of the SS/PBCH block. The point A is determined at least based on a subcarrier 0 of the common resource block and an offset provided by the high-layer parameter. The offset is expressed in units of resource blocks assuming 120 KHz for FR2-2.
1 . A terminal device comprising:
reception circuitry configured to:
receive a synchronization signal/physical broadcast channel (SS/PBCH) block and a first higher-layer parameter, the first higher-layer parameter comprising a first offset that is between a reference point, common to a plurality of resource blocks, and a lowest subcarrier of a common resource block (CRB),
receive a second higher-layer parameter comprising a second offset that is between the reference point and a lowest subcarrier of a resource grid, and
receive a third high-layer parameter comprising at least a slot configuration period and a reference subcarrier spacing of the resource grid; and
determination circuitry configured to:
determine the reference point based on a lowest subcarrier of the SS/PBCH block and the first offset,
determine the resource grid based on the reference point and the second offset, and
determine whether the slot configuration period is valid,
wherein the slot configuration period is valid only for the reference subcarrier spacing in a case that the reference subcarrier spacing is set to a certain value.
2 . The terminal device according to claim 1 , wherein a slot configuration period of 0.078125 millisecond is valid only for the reference subcarrier spacing in a case that the reference subcarrier spacing is set to 6.
3 . The terminal device according to claim 1 , wherein a slot configuration period of 0.15625 millisecond is valid only for the reference subcarrier spacing in a case that the reference subcarrier spacing is set to 5 or 6.
4 . The terminal device according to claim 1 , wherein a slot configuration period of 0.3125 millisecond is valid only for the reference subcarrier spacing in a case that the reference subcarrier spacing is set to 4 or 5 or 6.
5 . A base station device comprising:
transmission circuitry configured to:
transmit a synchronization signal/physical broadcast channel (SS/PBCH) block and a first higher-layer parameter, the first higher-layer parameter comprising a first offset that is between a reference point, common to a plurality of resource blocks, and a lowest subcarrier of a common resource block (CRB),
transmit a second higher-layer parameter comprising a second offset that is between the reference point and a lowest subcarrier of a resource grid, and
transmit a third high-layer parameter comprising at least a slot configuration period and a reference subcarrier spacing of the resource grid; and
processing circuitry configured to:
set the reference point based on a lowest subcarrier of the SS/PBCH block and the first offset,
set the resource grid based on the reference point and the second offset, and
set the reference subcarrier spacing to only a certain value corresponding to the slot configuration period.
6 . The base station device according to claim 5 , wherein the certain value is 6, corresponding to a slot configuration period of 0.078125 millisecond.
7 . The base station device according to claim 5 , wherein the certain value is 5 or 6, corresponding to a slot configuration period of 0.15625 millisecond.
8 . The base station device according to claim 5 , wherein the certain value is 4 or 5 or 6, corresponding to a slot configuration period of 0.3125 millisecond.
9 . A communication method used by a terminal device, the communication method comprising the steps of:
receiving a synchronization signal/physical broadcast channel (SS/PBCH) block and a first higher-layer parameter, the first higher-layer parameter comprising a first offset that is between a reference point, common to a plurality of resource blocks, and a lowest subcarrier of a common resource block (CRB);
determining the reference point based on a lowest subcarrier of the SS/PBCH block and the first offset;
receiving a second higher-layer parameter comprising a second offset that is between the reference point and a lowest subcarrier of a resource grid;
determining the resource grid based on the reference point and the second offset;
receiving a third high-layer parameter comprising at least a slot configuration period and a reference subcarrier spacing of the resource grid; and
determining whether the slot configuration period is valid, wherein
the slot configuration period is valid only for the reference subcarrier spacing in a case that the reference subcarrier spacing is set to a certain value.