Remote UE RRC Re-Establishment in Multi-Path Relay Handover
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, remote user equipment (UE) in a multi-path operating mode faces ineffective Radio Resource Control (RRC) connection re-establishment upon receiving a notification from a relay UE during cell handover, leading to inefficiencies.
Innovation Solution
The remote UE determines its operating mode (single-path or multi-path) and the type of signaling radio bearer (SRB) to decide whether to initiate RRC connection re-establishment based on specific notification messages from the relay UE, considering different scenarios like radio link failure or cell reselection, thereby avoiding unnecessary re-establishments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the remote UE initiates RRC connection re-establishment procedure upon receiving notification from relay UE, then the connection reliability is improved, but unnecessary re-establishment occurs in multi-path mode leading to inefficiency
Solution Approach 1:
The invention changes the parameter of connection re-establishment decision by introducing mode-dependent behavior. The remote UE determines its operating mode (single-path or multi-path) and adjusts the re-establishment procedure accordingly: in single-path mode, re-establishment is always initiated; in multi-path mode, re-establishment is conditionally initiated based on SRB type and path status. This parameter change resolves the contradiction by making the system adaptive to different operational contexts.
Solution Approach 2:
The invention introduces dynamic decision-making based on real-time operating conditions. The remote UE dynamically evaluates its current mode and SRB configuration to determine whether to initiate re-establishment. This dynamic approach allows the system to optimize between reliability and efficiency based on the specific operational context, avoiding static one-size-fits-all behavior.
2Stability of the object's composition
If the remote UE always performs RRC connection re-establishment upon relay handover, then connection stability is ensured, but unnecessary signaling overhead and delay are introduced
Solution Approach 1:
The invention changes the parameter of re-establishment execution by introducing conditional logic based on operating mode and SRB type. Instead of always performing re-establishment, the system evaluates whether the current SRB configuration requires it. This parameter change eliminates unnecessary re-establishment operations in multi-path mode while maintaining stability when needed.
Solution Approach 2:
The invention extracts the unnecessary re-establishment operations from the universal procedure. By identifying that multi-path mode with direct SRB configuration does not require re-establishment, the system removes this redundant step from the standard procedure, thereby reducing signaling overhead and delay while preserving connection stability where actually needed.
3Productivity
If the remote UE operates in multi-path mode with direct connection, then transmission rate is improved, but complex determination of SRB type is required during handover
Solution Approach 1:
The invention segments the handover determination process into distinct decision branches based on operating mode and SRB type. The flowchart divides the complex determination into manageable segments: first check operating mode, then check SRB type, then apply appropriate re-establishment logic. This segmentation reduces cognitive complexity by organizing the decision-making into a structured, step-by-step process.
Solution Approach 2:
The invention introduces dynamic adaptability to handle the complexity of multi-path mode. The remote UE dynamically adjusts its handover behavior based on the detected operating mode and SRB configuration. This dynamic approach allows the system to simplify the determination process in multi-path mode by leveraging the existing direct connection information, rather than requiring complex re-evaluation of all connection parameters.
Data Source
AI summary
The present application provides a method performed by user equipment, and user equipment. The method is performed during communication performed between the UE and a base station via a single path or multiple paths, and includes the following steps: receiving, by a remote UE, a notification message from a relay UE, wherein the message includes a first information element representing an indication type, and the value of the first information element is set by the relay UE; and upon receiving the notification message, determining, by the remote UE in an RRC connected state, whether the remote UE is operating in a single-path mode or a multi-path mode; if the remote UE is operating in the single-path mode, initiating, by the remote UE, an RRC connection re-establishment procedure, and if the remote UE is operating in the multi-path mode, further determining, by the remote UE, whether an SRB is a direct bearer, an indirect bearer, or a split SRB.