Resource Reservation in Private Wireless Networks
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Solution Overview
Problem
Existing V2X communication systems face challenges with outdated sensing and hidden incoming nodes, leading to a high risk of packet collisions due to limited sensing capabilities in time and space.
Innovation Solution
A resource reservation method is introduced in a private wireless communication network, where an application server uses trajectory, velocity, and radio communication range data to identify potential intersections and generate assistance data to adapt radio resource reservations, thereby reducing the risk of packet collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If UEs perform autonomous resource selection based on local sensing in SL mode 2, then device complexity and base station control overhead are reduced, but the reliability of resource reservation deteriorates due to outdated sensing information and hidden incoming nodes
Solution Approach 1:
The patent combines local sensing performed by UEs with centralized sensing performed by the base station. The base station aggregates sensing information from multiple UEs and provides centralized sensing results to assist autonomous resource selection, merging distributed and centralized approaches to improve reliability while maintaining device autonomy
Solution Approach 2:
The base station acts as an intermediary that collects sensing information from UEs, processes it centrally, and provides assisted sensing results back to UEs. This intermediary role enables UEs to benefit from extended sensing capabilities without performing complex autonomous sensing themselves, resolving the contradiction between simplicity and reliability
2Loss of time
If UEs use a sensing window of 1 second before resource selection, then the sensing process remains computationally simple, but the sensing information becomes outdated quickly leading to collisions
Solution Approach 1:
The base station performs sensing in advance and maintains updated sensing information about the radio environment, including resources reserved by other UEs. When UEs need to select resources, the base station provides this pre-computed sensing information, eliminating the need for UEs to perform lengthy sensing procedures immediately before resource selection
3Area of stationary object
If UEs rely on InterUE-coordination to share sensing results, then the spatial coverage of sensing is extended, but the temporal outdatedness of sensing information cannot be resolved
Solution Approach 1:
The patent replaces the mechanical limitation of UE communication range with base station coverage. Since the base station has broader coverage and can sense resources reserved by UEs outside individual UE ranges, it provides centralized sensing information that reflects the actual radio environment, substituting UE-based sensing with base station-based sensing for improved accuracy
Data Source
AI summary
A resource reservation method in a private wireless communication network comprises:Obtaining a trajectory, a velocity and a radio communication range for each terminal;Identifying, from obtained data, whether there is a space area and a corresponding time interval where at least two radio communication ranges are going to intersect;In the case of intersection, identifying whether there is a risk of collision in said time interval between packets to be sent or received by the terminals whose radio communication ranges intersect;In the case where a risk of collision is identified, generating assistance data in the form of preferred and/or non-preferred radio resources from metric values stored in a database and transmitting the generated assistance data to at least one terminal; andUsing, by said at least one terminal, the generated assistance data transmitted by the application server for adapting radio resource reservation.