Radio Communication System Intermediate State Transition
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current radio communication systems, particularly in the transition between RRC_Connected and RRC_Idle states, lack a defined process for intermediate transitions and inter-RAT state transitions, which complicates the management of user equipment state changes between different radio access technologies like NR and LTE.
Innovation Solution
A radio communication system with a user equipment that includes a state management unit and a state transition unit, capable of performing cell reselection and retaining radio parameter information to manage transitions between connected, sustained, and idle states across different radio access technologies, ensuring seamless state transitions and resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cell reselection for the second base station is performed while communicating with the first base station, then mobility between different radio access technologies is enabled, but radio parameter information and context identifiers may be lost during transition
Solution Approach 1:
The state management unit performs preliminary action by retaining radio parameter information and context identifiers before the cell reselection process begins. This ensures that when the user equipment transitions from the first base station to the second base station, the necessary communication parameters are already preserved and can be quickly reactivated, preventing information loss during the transition.
Solution Approach 2:
The state management unit acts as an intermediary between the radio parameter information storage and the cell reselection process. It temporarily holds the first radio parameter information and first context identifier, mediating the transition by ensuring these parameters are preserved during the cell reselection to the second base station, thus preventing information loss while enabling mobility.
2Productivity
If an intermediate sustained state is introduced between connected and idle states, then state transition granularity is improved, but system complexity increases due to additional state management requirements
Solution Approach 1:
The state management is segmented into distinct states: connected state, sustained state, and idle state. The state management unit specifically manages transitions between these segmented states, with the sustained state serving as an intermediate stage. This segmentation allows for more granular control of state transitions while organizing the complexity into manageable discrete states rather than a continuous spectrum.
Solution Approach 2:
The system implements dynamic state transitions where the user equipment can flexibly move between connected, sustained, and idle states based on communication needs. The state transition unit dynamically adjusts the communication state by retaining or releasing radio parameter information, enabling efficient transitions without permanently committing to a single state configuration.
3Speed
If radio parameter information is retained during cell reselection, then transition speed is improved, but memory resources are consumed
Solution Approach 1:
The state management unit extracts and retains only the essential first radio parameter information and first context identifier needed for rapid state transition, rather than storing all possible communication parameters. This selective extraction enables fast transitions while minimizing memory consumption by storing only the critical parameters required for resuming communication in the sustained state.
Data Source
AI summary
Disclosed is a radio communication system capable of implementing a state transition related to an intermediate state between a connected state and an idle state.An aspect of the present invention relates to a user equipment, wherein the user equipment includes a state management unit that manages a communication state of the user equipment, and a state transition unit that causes the communication state of the user equipment to transition, and when the user equipment is communicating with the first base station, if cell reselection for the second base station is performed, the state transition unit performs the cell reselection for the second base station while the state management unit retains first radio parameter information for radio communication between the user equipment and the first base station and a first context identifier specifying the first radio parameter information.