Radio Terminal Control Plane Data Transmission RRC Context

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Solution Overview

Problem

The existing communication architectures for Cellular Internet of Things (CIoT) do not clearly define the events triggering data transmission over the control plane when a radio terminal is configured for suspension and resumption of RRC connections, nor do they clarify how RRC connection context is handled during data transmission, leading to ambiguity in message types used for data transmission.

Innovation Solution

A radio terminal is configured to support multiple communication architecture types, including one for data transmission via the control plane and another involving suspension and resumption of RRC connections, by retaining RRC connection context in an idle state and reusing it for subsequent connections, allowing seamless transition between these architectures based on network configuration.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If the terminal uses the second communication architecture type (user plane with RRC suspension/resumption) for data transmission, then power consumption is reduced and coverage is extended, but flexibility in handling different data transmission scenarios is limited

Engineering Contradiction:

Improveterminal power consumptionVSAvoidcommunication architecture flexibility

Core Design Contradiction:

Use of energy by moving objectVSAdaptability or versatility

Solution Approach 1:

The terminal dynamically selects between first communication architecture type (control plane) and second communication architecture type (user plane with RRC suspension/resumption) based on data transmission requirements, network configuration, and current RRC state, enabling adaptive optimization of power consumption and communication flexibility

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The terminal is designed to support multiple communication architecture types simultaneously, allowing it to function effectively in both control plane and user plane modes depending on the scenario, thereby achieving both low power consumption and high adaptability

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Loss of time

If the terminal retains RRC connection context in idle state for suspension and resumption, then connection setup time is reduced, but memory resources are consumed

Engineering Contradiction:

Improveconnection setup timeVSAvoidmemory resources

Core Design Contradiction:

Loss of timeVSQuantity of substance

Solution Approach 1:

The terminal performs preliminary retention of RRC connection context when transitioning to idle state for the second communication architecture type, enabling rapid connection resumption without full re-establishment procedures, thus reducing connection setup time while managing memory resources efficiently

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS11388560B2Radio terminal, radio station, and method therefor

Publication Date: 2022.07.12 NEC CORP

AI summary

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.