Kyocera

In a first aspect, a communication control method is used in a cellular communication system. The communication control method includes receiving, by a relay node involved between a parent node and a child node, a flow control feedback message from the parent node or the child node. The communication control method includes executing, by the relay node, local rerouting to transfer a data packet to an alternative path, which is different from a path to the parent node or the child node transmitting the flow control feedback message, in response to a certain period elapsing after receiving the flow control feedback message.

A communication method performed by a UE 100 in a mobile communication system for providing a Multicast Broadcast Service (MBS) includes: receiving, in an RRC idle state or an RRC inactive state, a multicast session from a network; measuring, in a multicast reception state in which the multicast session is being received, reception quality from the network; and performing processing of transitioning to an RRC connected state for multicast reception in response to the measured reception quality being lower than a threshold value.

In an embodiment, a communication control method is a communication control method in a mobile communication system that includes a first user equipment and a second user equipment and can perform sidelink communication between the first user equipment and the second user equipment. The communication control method includes, when the first user equipment transmits a Radio Resource Control (RRC) message including configuration information related to the sidelink communication, and discontinuous reception is configured between the first user equipment and the second user equipment, performing, by the first user equipment, waiting processing for reception of an RRC response message responding to the RRC message regardless of a configuration of the discontinuous reception. The communication control method includes transmitting, by the second user equipment, the RRC response message responding to the RRC message when receiving the RRC message, and receiving, by the first user equipment, the RRC response message.

In a first aspect, a communication control method is used in a cellular communication system. The communication control method includes transmitting, by a first relay node subordinate to a first donor base station, a first packet to a second donor base station different from the first donor base station. The communication control method includes forwarding, by the second donor base station, the first packet to the first donor base station by using a path for data forwarding, and transmitting, by the first donor base station, the first packet to a network.

In a first aspect, a communication control method is used in a mobile communication system for providing a multicast broadcast service (MBS) from a base station to a user equipment, the communication control method including: broadcasting, by a base station, an MBS system information block; and transmitting, by the base station, scheduling information of an MBS traffic channel on an MBS control channel, in which the MBS system information block includes a search space identifier for a user equipment to receive the MBS control channel, and the search space identifier indicates a search space that is a resource range to be decoded by the user equipment in a physical downlink control channel associated with the MBS control channel.

A communication control method used in a mobile communication system, the mobile communication system providing a multicast broadcast service (MBS) from a base station to a user equipment, the communication control method including, by the base station, performing header compression processing in which transmission of header information is omitted, the header information being static information included in a header of an MBS packet, and transmitting a compressed MBS packet subjected to the header compression processing, and transmitting, by the base station, after starting transmitting of the compressed MBS packet, the header information separately from the compressed MBS packet.

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