Sidelink Resource Reservation Limits for V2X Reliability
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Solution Overview
Problem
In 5G V2x Sidelink communication, there is a challenge in managing resource reservation to avoid interference and resource wastage due to excessive or unnecessary reservation of time-frequency resources, which affects the efficiency and utilization of system resources.
Innovation Solution
Implementing a reservation resource limit to determine the quantity of time-frequency resources needed for current and future transmissions, ensuring that the total reserved resources do not exceed predefined limits, and using sidelink control information to notify other terminals of these reservations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminals reserve time-frequency resources for current and future transmissions without limits, then transmission reliability is improved, but resource wastage increases and system efficiency deteriorates
Solution Approach 1:
The patent introduces a reservation resource limit parameter that constrains the maximum number of resources a terminal can reserve. This parameter change transforms the unlimited resource reservation scenario into a controlled one, where terminals must prioritize which transmissions to reserve resources for, thereby reducing overall resource wastage while maintaining essential transmission reliability
Solution Approach 2:
The patent implements partial action by allowing terminals to reserve resources for only the most critical current and future transmissions rather than all possible transmissions. The limit forces terminals to select a subset of transmissions to prioritize, achieving adequate reliability for essential communications while avoiding excessive resource consumption
2Reliability
If terminals reserve more time-frequency resources for future transmissions, then transmission reliability is improved, but resource utilization efficiency deteriorates
Solution Approach 1:
By introducing the reservation resource limit parameter, the patent changes the system's resource allocation dynamics. Terminals can no longer aggressively reserve resources for distant future transmissions, which improves overall resource utilization efficiency while still allowing sufficient reservations for near-term transmissions to maintain reliability
Solution Approach 2:
The patent creates a dynamic resource reservation system where terminals must continuously evaluate which transmissions to prioritize based on the limit constraint. This dynamic adjustment prevents static over-reservation and allows the system to adapt resource allocation to actual transmission needs, improving utilization efficiency
3Reliability
If terminals reserve resources without limits, then transmission reliability is improved, but system complexity increases due to need for limit management
Solution Approach 1:
The patent implements self-service by having terminals autonomously manage their own resource reservations within the configured limit. Each terminal independently determines which transmissions to prioritize and reserves resources accordingly, without requiring complex centralized coordination or additional system infrastructure, thus limiting the increase in overall system complexity
Data Source
AI summary
A communication apparatus includes: a receiver, which in operation, receives configuration information relating to an upper limit of a number of reservation resources; a transmitter, which in operation, transmits sidelink control information indicating resources of the reservation resources, where the resources are determined based on the configuration information.