Communication Node Direct Link Scheduling for V2X Interference
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Solution Overview
Problem
In vehicle communication environments, frequency interference occurs due to overlapping coverage areas of roadside units (RSUs) with different frequencies, affecting the continuity of services between RSUs and onboard units (OBUs).
Innovation Solution
An operation method for a communication node that involves obtaining scheduling information from a base station, identifying modulation and coding scheme (MCS) and radio resource information, and transmitting messages to other UEs based on these configurations, which are adjusted according to vehicle speed, density, and service coverage, to support direct communications through the PC5 interface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RSUs use different frequencies in overlapping coverage areas, then service continuity between RSUs and OBUs is maintained, but frequency interference occurs affecting communication reliability
Solution Approach 1:
The patent segments the communication system into multiple base stations (eNodeBs) with overlapping coverage areas, where each base station independently manages radio resources for V2V communications. By dividing the coverage area into multiple cells and assigning different resource pools to each, the system maintains service continuity while reducing frequency interference through spatial segmentation.
Solution Approach 2:
The patent implements dynamic resource allocation where base stations adjust radio resource configurations based on real-time conditions such as vehicle density, speed, and channel quality. This dynamic adaptation allows the system to optimize communication reliability while minimizing interference by adjusting MCS indices, resource block allocations, and power levels according to current network conditions.
2Productivity
If radio resources are allocated dynamically based on vehicle conditions, then communication efficiency is improved, but system complexity increases
Solution Approach 1:
The patent enables user equipment (OBUs) to autonomously select and configure radio resources based on pre-configured parameters and current channel conditions. The UE independently determines MCS indices, selects appropriate resource blocks, and adjusts transmission parameters without requiring continuous network control signaling, thereby improving communication efficiency while reducing system complexity through distributed decision-making.
Solution Approach 2:
The patent implements pre-configuration of radio resource pools and MCS tables by base stations before V2V communications begin. These preliminary configurations include predefined resource block allocations, modulation schemes, and coding rates that UEs can directly apply based on their vehicle conditions, eliminating the need for complex real-time negotiations and reducing system overhead.
3Reliability
If MCS and radio resources are configured based on vehicle speed and density, then data transmission reliability is improved, but scheduling overhead increases
Solution Approach 1:
The patent utilizes parameter changes in vehicle conditions (speed, density, channel quality) to dynamically adjust communication parameters such as MCS index and resource block allocation. By monitoring these parameters and adapting resource configurations accordingly, the system maintains high data transmission reliability while using efficient threshold-based decision-making to minimize scheduling overhead and avoid excessive signaling.
Data Source
AI summary
Disclosed are operation methods of communication node supporting direct communications in network. The operation method comprises obtaining scheduling information configured for the direct communications from a first base station; identifying modulation and coding scheme (MCS) information and radio resource information included in the scheduling information; and transmitting, to a second UE, a first message to which a MCS indicated by the MCS information is applied through radio resources indicated by the radio resource information. Therefore, performance of a communication system can be enhanced.