Base Station V2X Bearer Postponement
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Solution Overview
Problem
In wireless communication systems, particularly in V2X communication, the release of V2X bearers can generate significant signaling overhead, especially when the base station is configured to support only PC5-based V2X service, leading to inefficiencies in resource allocation and increased signaling burden.
Innovation Solution
A method is introduced where the base station postpones resource allocation for the V2X bearer and maintains its context, transmitting this information to the mobility management entity (MME) and user equipment (UE), allowing the V2X bearer to be used continuously without release, even when the base station is configured as 'PC5 only', thereby avoiding signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the base station releases the V2X bearer when configured as 'PC5 only', then the signaling overhead is reduced, but the communication continuity is disrupted and resource allocation efficiency deteriorates
Solution Approach 1:
The base station performs preliminary actions by maintaining the V2X bearer context in a suspended state rather than releasing it. This allows the bearer to be quickly reactivated when Uu interface resources become available, avoiding communication disruptions while minimizing signaling overhead compared to continuous active maintenance.
Solution Approach 2:
The system dynamically adapts the V2X bearer state based on network conditions. When Uu interface load is high, the bearer is suspended with minimal signaling. When resources are available, the bearer is reactivated. This dynamic state transition resolves the contradiction between minimizing signaling overhead and maintaining communication continuity.
2Reliability
If the base station continuously maintains the V2X bearer context, then the communication reliability is improved, but the signaling overhead increases and resource allocation efficiency deteriorates
Solution Approach 1:
Instead of continuous maintenance, the system uses periodic action by suspending the V2X bearer context during periods of high Uu interface load and reactivating it when resources are available. This periodic suspension and reactivation maintains communication reliability while significantly reducing signaling overhead compared to continuous maintenance.
Solution Approach 2:
The invention extracts the essential V2X bearer context information and maintains it in a suspended state at the base station, separating the context maintenance from continuous resource allocation. This extraction allows the system to maintain communication reliability without the full signaling overhead of continuous active bearer maintenance.
3Speed
If the base station allocates resources for the V2X bearer immediately, then the service delivery speed is improved, but the resource allocation efficiency deteriorates under high Uu interface load
Solution Approach 1:
The base station performs preliminary setup of the V2X bearer context without immediate resource allocation. When Uu interface resources become available, the pre-configured context allows rapid resource assignment, achieving fast service delivery without committing resources prematurely, thus maintaining allocation efficiency under high load conditions.
Solution Approach 2:
The system dynamically adjusts resource allocation timing based on Uu interface load conditions. Rather than immediate static allocation, the V2X bearer resources are allocated dynamically when network conditions permit, balancing service delivery speed with resource allocation efficiency.
Data Source
AI summary
Provided are a method by which a base station performs vehicle to everything (V2X) communication in a wireless communication system, and an apparatus for supporting the same. The method can comprise the steps of: receiving a V2X bearer indication indicating a V2X bearer, wherein the V2X bearer is a bearer used for a V2X service; determining that the base station supports only a PC5-based V2X service between the PC5-based V2X service or a Uu-based V2X service; postponing a resource allocation for the V2X bearer; and transmitting, to a mobility management entity (MME), information indicating that the resource allocation for the V2X bearer is postponed.