US Patent No. 10,993,144

TERMINAL APPARATUS, MME, COMMUNICATION METHOD OF TERMINAL APPARATUS, AND COMMUNICATION METHOD OF MME


Patent No. 10,993,144
Issue Date April 27, 2021
Title Terminal Apparatus, Mme, Communication Method Of Terminal Apparatus, And Communication Method Of Mme
Inventorship Yudai Kawasaki, Sakai (JP)
Masafumi Aramoto, Sakai (JP)
Assignee SHARP KABUSHIKI KAISHA, Sakai (JP)

Claim of US Patent No. 10,993,144

1. A User Equipment (UE) comprising:transmission and/or reception circuitry configured to:
perform communication by use of a User plane Cellular Internet of Things (CIoT) Optimisation after completion of a procedure which is initiated by the UE,
in a case of changing a communication method, transmit a first control message to a core network, and receive a second control message as a response to the first control message from the core network, and
perform communication by use of a Control plane CIoT Optimisation after receiving the second control message; and
control circuitry, wherein
the transmission and/or reception circuitry, in the procedure, is configured to:
transmit a Request message to the core network, and
receive an Accept message from the core network,
the Request message includes UE capability information indicating support of the User plane CIoT Optimisation and information indicating a request to use the User plane CIoT Optimisation,
the Accept message includes network capability information indicating support of the User plane CIoT Optimisation,
the control circuitry receives the network capability information indicating the support of the User plane CIoT Optimisation to interpret that use of the communication by use of the User plane CIoT Optimisation is accepted,
the first control message includes information indicating a request to use the Control plane CIoT Optimisation,
the second control message includes information indicating the Control plane CIoT Optimisation,
the control circuitry receives the information indicating the Control plane CIoT Optimisation to interpret that use of the communication by use of the Control plane CIoT Optimisation is accepted,
the communication by use of the User plane CIoT Optimisation is transport of user data using a communication path for transmitting and/or receiving the user data,
in a case where the control circuitry receives a message to suspend a Radio Resource Control (RRC) connection from a base station apparatus when the communication by use of the User plane CIoT Optimisation is used, the control circuitry enters an idle mode while keeping a UE context, and
the communication by use of the Control plane CIoT Optimisation is transport of user data using a communication path for transmitting and/or receiving a control message, and is performed through the core network.