UE TAU Request Active Flag for Paging Response in Control Plane IoT
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Solution Overview
Problem
In wireless communication systems, there is a challenge in efficiently managing data transmission during tracking area updates and maintaining signaling connections, especially when a UE cannot respond to mobile terminated paging, leading to resource shortages and inefficiencies.
Innovation Solution
A method is introduced where a UE sets specific flags in tracking area update requests to maintain or release NAS signaling connections and to initiate tracking area updates or service requests based on EPS update statuses, allowing for efficient data transmission through control plane CIoT EPS optimization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a UE uses service request procedure to respond to paging, then data transmission can be initiated, but the UE cannot respond to paging in specific situations leading to resource shortages
Solution Approach 1:
The patent dynamically adapts the paging response mechanism based on UE capability and network configuration. When service request procedure fails or is unavailable, the system transitions to using TAU procedure with active flag as an alternative response mechanism, ensuring continuous operational reliability while maintaining data transmission efficiency
Solution Approach 2:
The patent changes the response parameters by using different procedure types (service request vs. TAU with active flag) depending on the situation. The active flag parameter in TAU procedure is specifically set to indicate data transmission requirement, allowing the system to overcome the limitation of unable-to-respond scenarios
2Reliability
If a UE performs tracking area update procedure, then network registration is updated, but signaling connection may be released causing inefficiency
Solution Approach 1:
The patent performs preliminary action by setting the active flag in the TAU request message before the TAU procedure completes. This ensures that the signaling connection is maintained throughout the procedure and immediately available for data transmission, avoiding the complexity of re-establishing connections after TAU completion
3Productivity
If control plane CIoT EPS optimization is used, then data transmission over control plane is enabled, but paging response mechanisms become limited
Solution Approach 1:
The patent makes the TAU procedure multi-functional by using it both for its traditional purpose (network registration update) and as a paging response mechanism when service request is unavailable. The active flag enables the TAU procedure to simultaneously indicate data transmission requirements, providing versatility in paging response while maintaining control plane optimization
Data Source
AI summary
A method for controlling mobile terminated (MT) data in a wireless communication system and a device therefor are disclosed. The method for controlling MT data by a user equipment (UE) in a wireless communication system includes receiving paging from a network and transmitting a tracking area update (TAU) request message to a mobility management entity (MME) in response to the paging when an EPS update status of the UE is EU2 NOT UPDATED due to an unsuccessful attempt of a last TAU procedure of the UE upon receiving the paging, wherein when the UE is using only signaling optimization to enable delivery of user data over a control plane via the MME, a first active flag in the TAU request message is set.