Communication control method, wireless terminal, base station, and RIS device
A communication control method used in a mobile communication system including a gNB and a UE performing wireless communication with the gNB, the communication control method including: establishing, by an RIS-UE, a wireless connection with the gNB, the RIS-UE controlling an RIS device that changes a propagation direction of a radio wave incident from the gNB; and transmitting, by the gNB to the RIS-UE through the wireless communication, one or more pieces of RIS control information used to control the RIS device.
1 . A communication control method used in a mobile communication system that comprises a network node and a first wireless terminal configured to perform wireless communication with the network node, the communication control method comprising:
establishing, by the first wireless terminal, a wireless connection with the network node, the first wireless terminal configured to control a first device configured to change a propagation state of a radio wave from the network node;
controlling the first device by the first wireless terminal to change the propagation state of the radio wave between the network node and a user equipment different from the first wireless terminal; and
receiving, by the first wireless terminal from the network node through the wireless connection, one or more pieces of control information used to control the first device.
2 . The communication control method according to claim 1 , wherein
the wireless connection is a Radio Resource Control (RRC) connection, and
the receiving comprises receiving, by the first wireless terminal, an RRC message comprising the one or more pieces of control information as information elements.
3 . The communication control method according to claim 1 , wherein
the receiving comprises receiving, by the first wireless terminal, a Medium Access Control Control Element (MAC CE) comprising information for configuring a propagation direction of the radio wave as the one or more pieces of control information.
4 . The communication control method according to claim 1 , further comprising:
receiving, by the first wireless terminal, system information broadcast by the network node;
in a case where the system information includes support information indicating that the network node supports the first wireless terminal configured to control the first device, establishing, by the first wireless terminal, the wireless connection with the network node.
5 . The communication control method according to claim 1 , wherein the receiving comprises receiving, by the first wireless terminal, control timing information indicating a timing at which the one or more pieces of control information is applied.
6 . The communication control method according to claim 5 , wherein
the one or more pieces of control information are a plurality of pieces of control information, and
the control timing information comprises information indicating a timing at which each of the plurality of pieces of control information is applied.
7 . A wireless terminal for performing wireless communication with a network node in a mobile communication system, the wireless terminal comprising:
a receiver configured to receive, from the network node through wireless connection with the network node, one or more pieces of control information used to control a first device configured to change a propagation state of a radio wave from the network node; and
a controller configured to control the first device to change the propagation state of the radio wave between the network node and a user equipment different from the wireless terminal.
8 . A system comprising the wireless terminal according to claim 7 and a network node for performing wireless communication with the wireless terminal.