UE Intermediate State Signaling for Faster Cell Reselection
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Solution Overview
Problem
Existing LTE systems face high signaling overheads and data transmission delays due to frequent transitions between idle and connection states and cell handovers, which increase power consumption and signaling loads.
Innovation Solution
Implementing an intermediate state for user equipment (UE) based on configuration information that allows cell reselection within a specified list, reducing the need for full state transitions and context re-establishment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If UE transitions to idle state when not performing data transmission, then power consumption is reduced, but signaling overheads and data transmission delay increase when UE needs to transmit data again
Solution Approach 1:
The network side device performs preliminary actions by storing context information of the UE and configuring a cell list before the UE transitions to idle state. When UE moves within the configured cell list, the network already has the necessary context ready, eliminating the need for full state transition and context re-establishment, thus reducing data transmission delay while maintaining power savings.
Solution Approach 2:
The invention segments the traditional binary state model (idle/connection) into a more granular approach by introducing a configured idle state with cell list restrictions. This segmentation allows the system to maintain connection-like context storage and fast access capabilities while preserving idle-state power efficiency, resolving the contradiction between power consumption and transmission delay.
2Reliability
If UE performs cell handover when moving, then connection continuity is maintained, but signaling overheads and power consumption increase
Solution Approach 1:
Instead of performing full cell handover procedures with complete context transfer, the invention applies partial action by allowing UE to perform cell reselection within the pre-configured cell list without triggering full handover signaling. The network maintains context information for all cells in the list, enabling partial connectivity maintenance with reduced signaling overhead.
Solution Approach 2:
The pre-configured cell list acts as an intermediary mechanism between full connection state and idle state. It provides a middle ground where UE can move between cells without complete handover procedures, reducing signaling complexity while maintaining connection continuity through pre-stored context information at the network side.
3Productivity
If UE establishes RRC connection and data bearer before data transmission, then data can be transmitted immediately, but signaling overheads increase
Solution Approach 1:
The network side device performs preliminary actions by storing context information and configuring cell lists before UE actually needs to transmit data. This preliminary preparation enables UE to quickly resume data transmission without establishing full RRC connection and data bearers from scratch, reducing signaling overheads while maintaining productivity.
Solution Approach 2:
The invention changes the state parameters of the UE by introducing a configured idle state with specific parameters (cell list, context storage requirements) that differ from both traditional idle and connection states. This parameter change enables faster state transitions and reduced signaling overhead while maintaining data transmission readiness.
Data Source
AI summary
Disclosed are a signaling optimization method and device, to resolve a problem of heavy signaling overheads and long data transmission delay when a user equipment (UE) accesses a network side. The method includes: receiving, by the UE, configuration information sent by a first network side device, where the configuration information includes a list, and the list is a cell list or a base station list; and entering, by the UE, an intermediate state according to the configuration information, where the intermediate state means that: when the UE stores context information of the UE, if the UE moves and a cell movement range falls within a coverage area of a cell or a base station included in the list, the UE performs cell reselection according to the list. Embodiments of the present disclosure are applicable to optimization of signaling transmission between the UE and a network side.