V2X Resource Allocation via Direction-Aware RSU Selection
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Solution Overview
Problem
Current mobile telecommunications systems, particularly those with D2D capabilities, face challenges in providing low-latency and high-reliability communications for V2X environments due to inefficient resource allocation and RSU selection processes, which result in delays and sub-optimal connections, especially in high-speed and dynamic scenarios.
Innovation Solution
A method for allocating resources to V2X-enabled terminals involves measuring link quality and direction information to proactively select suitable RSUs, allowing for semi-persistent resource allocation and dynamic de-allocation based on terminal movement, reducing delays and improving communication reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If resources are allocated on request from terminals with allocation periods of 40ms or more, then resource allocation can be performed in a controlled manner, but transmission delays increase significantly (up to 80ms round-trip delay)
Solution Approach 1:
The base station proactively allocates resources to terminals before they need to transmit data. The base station identifies terminals that may need resources (based on buffer status, QoS requirements, or predicted traffic patterns) and pre-assigns resources in advance, so when data needs to be transmitted, the terminal can immediately use the pre-allocated resources without waiting for the standard request-grant cycle.
Solution Approach 2:
The patent implements dynamic resource allocation where the base station continuously monitors terminal conditions and adjusts resource allocation in real-time. Instead of fixed periodic allocation, the system dynamically assigns resources based on current network conditions, terminal mobility, and immediate transmission needs, allowing allocation periods to be shorter than traditional 40ms when conditions permit.
2Reliability
If terminals autonomously select RSUs without base station coordination, then selection speed increases, but connection reliability decreases due to sub-optimal selections
Solution Approach 1:
The terminal provides feedback to the base station about available RSUs (measurement reports containing signal quality, direction, and other parameters). The base station uses this feedback to make informed decisions about which RSU should serve the terminal, combining terminal observations with network-wide knowledge to select the optimal RSU while maintaining fast response times.
Solution Approach 2:
The base station acts as an intermediary between the terminal and RSUs. Instead of direct terminal-RSU pairing, the base station receives terminal measurements, processes this information along with network state, and coordinates the assignment of terminals to RSUs. This intermediary role ensures optimal matching while maintaining fast selection through efficient information processing.
3Loss of time
If the base station waits for resource allocation requests from terminals, then resource utilization efficiency improves, but transmission delays increase for urgent communications
Solution Approach 1:
The base station performs preliminary resource allocation for terminals that are likely to need resources soon, based on buffer status reports, QoS profiles, or predicted traffic patterns. This pre-allocation ensures that when data becomes ready for transmission, resources are already assigned, eliminating the request-grant delay while allowing the base station to manage resources proactively rather than reactively.
4Adaptability or versatility
If resources are allocated for fixed allocation periods, then resource management simplifies, but adaptability to terminal movement and changing conditions decreases
Solution Approach 1:
The patent implements dynamic resource allocation where allocation periods and resource assignments are adjusted based on terminal mobility, signal conditions, and network load. The base station continuously monitors terminal conditions and re-allocates resources when terminals move or conditions change, making the system adaptive rather than static while managing complexity through efficient monitoring and decision-making algorithms.
Data Source
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AI summary
A method of allocating resources in a mobile telecommunications system, the system comprising a base station configured to communicate via a wireless interface with one or more terminals and one or more infrastructure nodes configured to communicate with the one or more terminals. The method comprises obtaining measurements wherein a measurement relates to a link between a first terminal of the one or more terminals and one of the one or more infrastructure node; obtaining direction information for the first terminal; determining, based the measurements and direction information, a candidate infrastructure node for the first terminal; and allocating resources for the first terminal to communicate with the candidate infrastructure node.