P2P Handover via Link Performance Thresholds
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Solution Overview
Problem
In P2P communication mode, UEs face challenges in maintaining communication when the P2P link and signaling link deteriorate due to environmental changes or movement, requiring a seamless handover to adjacent cells that can satisfy Quality of Service (QoS) requirements without disrupting the communication.
Innovation Solution
A method for P2P UEs to measure downlink signals of active and adjacent cells, identify suitable cells with higher link performance, and initiate a handover procedure to continue P2P communication, ensuring that the new cell's link performance meets predefined QoS standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If P2P communication mode is used to save radio resources, then radio resource efficiency is improved, but communication reliability deteriorates when link performance deteriorates due to environmental changes or movement
Solution Approach 1:
The system dynamically switches between P2P communication mode and conventional relaying mode based on real-time link performance conditions. When link quality deteriorates below a threshold, the system automatically transitions from direct P2P communication to relayed communication through base stations, ensuring continuous reliable communication while maintaining resource efficiency when conditions permit P2P mode.
Solution Approach 2:
The system changes the communication mode parameter based on link performance parameters. By monitoring link quality metrics and comparing them against predefined thresholds, the system adjusts the communication architecture parameter (P2P vs. relaying mode) to optimize both resource efficiency and reliability under different channel conditions.
2Stability of the object's composition
If handover procedure is initiated when link performance deteriorates, then communication continuity is improved, but handover failure risk increases when suitable target cells are not available
Solution Approach 1:
The system performs preliminary measurements of adjacent cell link performance before initiating handover. By evaluating the link quality of potential target cells in advance and comparing against thresholds, the system identifies suitable handover targets proactively, reducing the risk of handover failure when link deterioration occurs.
Solution Approach 2:
The system continuously monitors link performance and provides feedback to the handover decision mechanism. This feedback loop enables the system to assess both current link quality and potential target cell quality, making informed handover decisions that balance communication continuity with handover success probability.
3Loss of energy
If measurement threshold for handover is set low to maintain P2P mode, then radio resource saving is improved, but communication quality deteriorates when handover is delayed
Solution Approach 1:
The system uses different measurement thresholds for different communication modes. By defining separate threshold levels for P2P mode maintenance versus handover initiation, the system optimizes resource usage by maintaining P2P mode when possible while ensuring timely handover when link quality deteriorates below acceptable levels.
Solution Approach 2:
The system dynamically adjusts the operational mode based on real-time link performance relative to thresholds. This dynamic adaptation allows the system to maintain resource-efficient P2P communication when conditions permit while automatically transitioning to handover when quality requirements would be compromised.
Data Source
AI summary
A method to be executed by a UE (user equipment) is proposed, for said UE in P2P communication mode to perform cell handover, comprising steps of: detecting downlink signals of the active cell in which said UE is camping and its adjacent cells (S205); judging whether there exists a suitable cell whose link performance is a predefined value higher than that of said active cell (S209), according to the detecting result; sending a detection report message to a network system (S210) to start a judging procedure of said network system if there exists said suitable cell, and said judging procedure deciding whether said UE and another UE in P2P communication can handover into said suitable cell to continue P2P communication.