User Equipment State Control for Signaling Overhead Reduction
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Solution Overview
Problem
In LTE systems, switching from an idle state to a connection state for data transmission incurs significant signaling overhead, while 5G introduces an inactive state to reduce this overhead for small packet transmissions, but there is a need for efficient state control mechanisms to manage these states effectively.
Innovation Solution
A method and device for state control in user equipment (UE) and base stations that detect preset state switching events, such as non-designated bearers, NAS messages, data buffer thresholds, and RSRP values, to determine when to switch from an inactive state to a connection state, thereby optimizing data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE switches from idle state to connection state for data transmission, then data transmission capability is improved, but signaling overhead increases significantly
Solution Approach 1:
The patent segments the connection state into two distinct states: inactive state for small packet transmissions and connection state for larger data transmissions. This segmentation allows the UE to remain in a low-overhead inactive state for simple communications while only transitioning to the full connection state when necessary, thereby reducing overall signaling overhead while maintaining data transmission capability when needed.
Solution Approach 2:
The patent implements dynamic state transition mechanisms where the UE can flexibly switch between inactive and connection states based on real-time communication needs. The state transition is triggered by specific conditions such as data buffer thresholds, bearer type requirements, and RSRP values, allowing the system to adaptively optimize signaling overhead while ensuring data transmission capability is available when required.
2Loss of substance
If the UE remains in inactive state to reduce signaling overhead, then signaling overhead is reduced, but the ability to handle complex data transmission scenarios is limited
Solution Approach 1:
The patent employs parameter-based decision-making for state transitions, including data buffer size thresholds, RSRP value thresholds, and bearer type classifications. These parameters dynamically determine whether the UE should remain in the inactive state or transition to the connection state, enabling the system to handle diverse transmission scenarios appropriately while minimizing unnecessary state transitions and signaling overhead.
Solution Approach 2:
The patent implements feedback mechanisms where the UE continuously monitors communication conditions such as data buffer status, signal quality (RSRP), and bearer requirements. Based on this feedback, the UE makes informed decisions about state transitions, ensuring that it transitions to the connection state only when the communication scenario requires enhanced capability, thus balancing signaling overhead reduction with scenario handling versatility.
3Adaptability or versatility
If the UE frequently transitions between states to handle varying data transmission needs, then adaptability is improved, but system complexity increases
Solution Approach 1:
The patent pre-defines specific triggering conditions for state transitions, including data buffer threshold values, RSRP threshold values, and bearer type classifications. By establishing these criteria in advance, the UE can automatically determine when state transitions are necessary without requiring complex real-time decision-making algorithms, thereby reducing control mechanism complexity while maintaining adaptability to varying transmission needs.
Data Source
AI summary
A method for state control of a user equipment includes: when in an inactive state, sending, a state indication message for indicating that the UE needs to switch to a connection state, to a base station, upon detecting that a preset state switching event is triggered; switching to the connection state according to a state switching instruction returned by the base station. The preset state switching event includes at least one of: a bearer corresponding to traffic data to be sent or received by the UE does not belong to a designated bearer that is a bearer capable of transmitting the service data in the inactive state; a message to be sent by the UE is a NAS message; a data buffer size of the UE exceeds a first threshold; and an RSRP value of a reference signal sent by the base station is less than a second threshold.