Portable Subscriber Units Direct Link Switching
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Solution Overview
Problem
Wireless communication systems face limitations in coverage and signal strength, particularly in areas where vehicular repeaters (VRs) fail, leading to disrupted communication between Portable Subscriber Units (PSUs).
Innovation Solution
A method and system that enables PSUs to automatically switch to a direct channel link when a conventional communication link through a VR fails, allowing direct communication between PSUs without the VR, using a timer to manage the transition and maintain the direct channel link until the conventional link is restored.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If PSUs use vehicular repeaters (VRs) to extend coverage, then communication coverage is improved, but system reliability deteriorates when VRs fail
Solution Approach 1:
The patent introduces an intermediary mechanism (direct channel link establishment protocol) that enables PSUs to bypass the VR when it fails. When VR communication fails, the system automatically establishes direct channel links between PSUs, allowing them to communicate through alternative paths without requiring the VR as an intermediary, thus resolving the reliability issue while maintaining coverage extension capability
Solution Approach 2:
The system dynamically changes the communication parameter state by switching between VR-based conventional links and direct channel links. When the VR link fails, the system transitions to using direct channel links with different frequency parameters, allowing continuous communication by changing the operational parameters of the communication path
2Reliability
If PSUs switch to other mobile VRs when one fails, then communication continuity is improved, but device complexity increases due to multiple VR dependency management
Solution Approach 1:
The patent extracts the dependency on multiple VRs by enabling PSUs to communicate directly without requiring VR intermediaries. Instead of managing multiple VR connections and switching between them, the system allows PSUs to establish direct links, removing the complex VR dependency management layer while maintaining communication continuity
Solution Approach 2:
The system implements self-service by automatically detecting VR failure and establishing direct channel links without requiring manual intervention or complex switching logic. The PSU autonomously monitors communication status and transitions to direct links when needed, simplifying the management complexity while ensuring continuous operation
3Reliability
If PSUs establish direct channel links when VR fails, then communication reliability is improved, but loss of time occurs during transition
Solution Approach 1:
The system performs preliminary actions by pre-configuring direct channel link parameters and maintaining readiness to switch. The PSU continuously monitors VR link status and has pre-established the capability to activate direct links immediately upon failure detection, minimizing transition time through advance preparation of alternative communication paths
Data Source
AI summary
A method and system for communicating within a wireless communication network (200) is provided. The communication between Portable Subscriber Units (PSUs) (104 and 106) by using a Vehicular Repeater (110) over a conventional communication link (102) is attempted (404). If the conventional communication link attempt fails (406), the communication is initiated directly from one PSU (104) to at least one other PSU (106) by using a direct channel link (202).