Supplemental Resource Configuration for V2X Handover Interruption
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Solution Overview
Problem
In wireless communication systems, particularly during handover procedures, there is a service interruption due to the terminal device's inability to obtain resources for V2X transmission during the detach phase, leading to potential interference and resource wastage, as it cannot use pre-configured resources when under network coverage but out of coverage.
Innovation Solution
A method where a terminal device determines a time interval for supplemental resource availability based on a timer associated with the random access procedure during handover, allowing the use of supplemental resources from the source cell during the transition period, avoiding interference and optimizing resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the terminal device uses pre-configured resources during handover, then resource availability is improved, but interference with LTE traffic increases and resource utilization deteriorates
Solution Approach 1:
The network device pre-configures supplemental resources and associated timers before handover occurs. The terminal device receives this configuration in advance and activates the supplemental resources automatically when the timer triggers during the handover transition period, ensuring resource availability without ad-hoc allocation.
Solution Approach 2:
Supplemental resources act as an intermediary resource pool between the source cell and target cell resources. During the handover transition period when the terminal device cannot access either source or target resources, the supplemental resources provide a bridging mechanism to maintain V2X transmission continuity.
2Reliability
If the terminal device obtains resources during handover, then service continuity is improved, but resource complexity increases
Solution Approach 1:
The resource configuration is differentiated by time and state: normal resources are used during stable connection phases, while supplemental resources are activated only during the specific handover transition period. This localized resource allocation simplifies the overall system by avoiding the need for complex dynamic resource management across all states.
Solution Approach 2:
The terminal device dynamically switches between normal resources and supplemental resources based on its connection state and timer status. The resource configuration adapts automatically to the handover phase, using supplemental resources during transition and normal resources during stable connection, without requiring complex manual intervention.
3Reliability
If supplemental resources are used during the entire handover period, then service interruption is reduced, but resource wastage increases
Solution Approach 1:
The supplemental resources are activated periodically based on timer expiration events during handover. The timer is configured to trigger supplemental resource usage only during the specific transition period when the terminal device detaches from the source cell but has not yet connected to the target cell, rather than continuously throughout the entire handover process.
Solution Approach 2:
Instead of allocating supplemental resources for the entire handover duration, the system applies partial action by activating them only for the critical transition period when service interruption would otherwise occur. This minimizes resource wastage while still providing sufficient coverage for the most vulnerable phase of handover.
Data Source
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AI summary
Embodiments of the disclosure generally relate to resource configuration in a wireless communication network. A terminal device in the wireless communication network receives information about supplemental resource from a source cell. Then the terminal device determines a time interval, in which the supplemental resource is available to the terminal device, in a transition period of a handover from the source cell to a target cell based on a timer associated with a random access procedure in the handover. In this way, the terminal device may use the supplemental resource during the handover.