FIRST WIRELESS COMMUNICATION DEVICE AND SECOND WIRELESS COMMUNICATION DEVICE
A first wireless communication device includes a controller configured to: operate in a first mode or a second mode, the first mode being a mode that has a first mode in which data communication with a second wireless communication device may be performed, the second mode being a mode in which limited data communication may be performed; and transmit, at timing when the second wireless communication device may receive data in the second mode, a code related to message authentication and first data, to the second wireless communication device via a downlink channel, by allocating the code related to message authentication and the first data to the downlink channel that does not accompany a corresponding uplink channel.
1 . A first wireless communication device comprising:
a controller configured to:
operate in a first mode or a second mode, the first mode being a mode that has a first mode in which data communication with a second wireless communication device may be performed, the second mode being a mode in which limited data communication may be performed; and
transmit, at timing when the second wireless communication device may receive data in the second mode, a code related to message authentication and first data, to the second wireless communication device via a downlink channel, by allocating the code related to message authentication and the first data to the downlink channel that does not accompany a corresponding uplink channel.
2 . The first wireless communication device according to claim 1 , wherein
the timing when the first data may be received in the second mode has a cycle shorter than a cycle of calling the second wireless communication device.
3 . The first wireless communication device according to claim 1 , wherein
the timing when the first data may be received in the second mode has a cycle shorter than a cycle of quasi-static scheduling that may be set in the first mode.
4 . The first wireless communication device according to claim 3 , wherein
the first data includes an identifier that may identify the first data.
5 . The first wireless communication device according to claim 1 , wherein
the downlink channel includes identification information that identifies the second wireless communication device.
6 . The first wireless communication device according to claim 1 , wherein
the second mode includes a mode in which the second wireless communication device activates a radio unit that may receive the data at predetermined timing and stops the radio unit when a series of processing at the predetermined timing is complete.
7 . The first wireless communication device according to claim 6 , wherein
the first mode includes a mode in which the second wireless communication device does not stop the radio unit.
8 . The first wireless communication device according to claim 6 , wherein
the second mode includes an RRC_INACTIVE state.
9 . The first wireless communication device according to claim 8 , wherein
the first mode includes an RRC_CONNECTED state.
10 . The first wireless communication device according to claim 1 , wherein
the first data includes data of equal to or smaller than a predetermined size.
11 . A second wireless communication device comprising:
a second controller configured to:
operate in a first mode or a second mode, the first mode being a mode in which data communication with a first wireless communication device may be performed, the second mode being a mode in which limited data communication may be performed; and
receive, at timing when the first wireless communication device may receive data in the second mode, a downlink channel that does not accompany a corresponding uplink channel and includes a message authentication code and first data.