Radio terminal, radio station, and method therefor
AssigneeNEC Corporation
InventorsHisashi Futaki, Sadafuku Hayashi
Life of this patent
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Abstract
A radio terminal (1) is configured to transmit data using a first communication architecture type, in response to an occurrence of a request for specific data transmission when the radio terminal (1) has already been configured by a network (3) to use a second communication architecture type. This contributes to, for example, when the radio terminal has already been configured by the network to use the second communication architecture type that involves suspension and resumption of an RRC connection, facilitating effectively performing communication according to the first communication architecture type that involves data transmission over a control plane.
Claims8
A radio terminal comprising:
- a memory;
- and
- at least one processor coupled to the memory, wherein
- the at least one processor is configured to support a plurality of communication architecture types,
- the plurality of communication architecture types include:
- (a) an optimization associated with a Control Plane Cellular Internet of Things (CIoT) in which a data packet is transmitted via a control plane and
- (b) an optimization associated with a User Plane CIoT in which a data packet is transmitted via a user plane and that involves suspension and resumption of a Radio Resource Control (RRC) connection,
- wherein the suspension of the RRC connection is performed by using a RRC message related to release of the RRC connection and with retaining an Access Stratum (AS) context in the radio terminal,
- wherein the resumption of the RRC connection is performed when a state of the radio terminal is transitioned from an RRC idle state to an RRC connected state, and
- wherein the at least one processor is further configured to perform the resumption of the RRC connection, based on trigger from a Non-Access Stratum(NAS) layer when the radio terminal is in IDLE mode and if the radio terminal attempts to send data using the optimization associated with the Control Plane CIoT.
A method for a radio terminal comprising:
- performing a resumption of a Radio Resource Control (RRC) connection, based on trigger from a Non-Access Stratum(NAS) layer when the radio terminal is in IDLE mode and if the radio terminal attempts to send data using an optimization associated with a Control Plane Cellular Internet of Things (CIoT)
- wherein the radio terminal supports a plurality of communication architecture types,
- wherein the plurality of communication architecture types include:
- (a) the optimization associated with the Control Plane CIoT in which a data packet is transmitted via a control plane and
- (b) an optimization associated with a User Plane CIoT in which a data packet is transmitted via a user plane and that involves suspension and resumption of the RRC connection,
- wherein the suspension of the RRC connection is performed by using a RRC message related of release of the RRC connection and with retaining an Access Stratum (AS) context in the radio terminal, and
- wherein the resumption of the RRC connection is performed when a state of the radio terminal is transitioned from an RRC idle state to an RRC connected state.
Dependencies are inferred from the claim text.