Sidelink Resource Allocation for Latency-Constrained V2X
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Solution Overview
Problem
Current wireless communication systems, particularly in public safety networks, face challenges in providing reliable and secure direct communication between devices, especially in scenarios where cellular coverage is limited or unavailable, and there is a need for efficient resource allocation to reduce latency in sidelink and V2X communications.
Innovation Solution
The proposed method dynamically allocates radio resources for sidelink/D2D/V2X communications, allowing for both contiguous and non-contiguous allocation based on latency and availability, optimizing data transmission time by switching between resource allocation methods as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If contiguous subchannels are allocated for sidelink transmission, then data transmission rate is improved, but resource allocation flexibility deteriorates
Solution Approach 1:
The patent implements dynamic resource allocation where the UE can switch between contiguous and non-contiguous subchannel allocation based on real-time conditions. The determination unit dynamically selects the allocation mode by evaluating whether contiguous subchannels are available before a first time threshold, allowing the system to adapt resource allocation flexibility while maintaining high transmission rates when possible.
2Loss of time
If resource allocation is optimized for low latency, then data transmission time is reduced, but resource utilization efficiency deteriorates
Solution Approach 1:
The patent applies preliminary action by checking the availability of contiguous subchannels before a first time threshold is reached. The determination unit proactively evaluates resource availability in advance, and if contiguous resources are not available before the deadline, it prepares to use non-contiguous resources to meet the latency requirement, thus preventing time loss while optimizing resource usage.
3Reliability
If dynamic resource allocation switching is implemented, then communication reliability is improved, but system complexity increases
Solution Approach 1:
The patent segments the resource allocation decision-making process into distinct functional units: a determination unit that evaluates contiguous subchannel availability, and a transmission unit that executes the selected allocation mode. This segmentation allows the system to implement complex dynamic switching logic while maintaining clear separation of concerns, thereby improving reliability without excessively increasing overall system complexity.
Data Source
AI summary
A method and apparatus for a sidelink of a wireless communication system are proposed. A transmission UE can contiguously or non-contiguously allocate radio resources through sidelink communication. A specific resource allocation method is selected in consideration of latency of sidelink data/packets or other factors. For example, a specific resource allocation method can be determined based on whether a plurality of contiguous subchannels is allocated to radio resources before a first time, which is determined based on latency of data/packets.