Sidelink Resource Allocation via Spatial Sub-Zones
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Solution Overview
Problem
In vehicle-to-everything systems, the random selection of transmission resources by multiple terminal devices for sidelink communication increases the probability of conflicts, particularly in scenarios involving high-speed mobility and diverse service requirements.
Innovation Solution
The communication zone of a terminal device is divided into multiple communication sub-zones based on spatial geographic locations, including altitude, with each sub-zone corresponding to a specific resource pool, allowing devices to perform sidelink communication on the appropriate resource pool.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple terminal devices randomly select transmission resources from a large resource pool for sidelink communication, then the system has simple resource selection mechanism, but the probability of conflict between devices increases
Solution Approach 1:
The patent divides the communication zone into multiple communication sub-zones based on spatial geographic location (including altitude), and associates each sub-zone with a specific resource pool. This segmentation approach reduces conflict probability by ensuring that devices in different sub-zones use different resource pools, while maintaining simple random selection within each sub-zone's resource pool.
2Reliability
If terminal devices use dedicated resource pools associated with their specific sub-zones, then the probability of resource conflicts is reduced, but the system complexity increases due to sub-zone division and resource pool mapping
Solution Approach 1:
The network device performs preliminary division of the communication zone into sub-zones and pre-establishes the mapping relationship between sub-zones and resource pools before devices need to communicate. The network device transmits configuration information to terminal devices in advance, enabling them to determine their appropriate resource pools without complex real-time calculations.
Solution Approach 2:
The patent introduces the network device as an intermediary that manages the division of communication zones and the allocation of resource pools. The network device transmits configuration information to terminal devices, serving as a mediator that simplifies the system by centralizing the complex division and mapping logic in the network side.
3Productivity
If the communication zone is divided into multiple sub-zones based on spatial geographic location, then resource allocation becomes more efficient, but the measurement and detection complexity increases
Solution Approach 1:
The patent uses altitude as a key parameter for dividing the communication zone into sub-zones. By changing the spatial parameter from two-dimensional (longitude and latitude) to three-dimensional (including altitude), the system achieves more efficient resource allocation while relying on readily available altitude information from devices, thus reducing measurement complexity.
Data Source
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AI summary
Embodiments of the present application disclose a wireless communication method, a terminal device, and a network device. The method includes: determining, by a terminal device, according to information of a spatial location of the terminal device, an identity of a communication sub-zone of the terminal device, where the spatial location of the terminal device includes altitude of the terminal device in a communication zone, and the communication zone includes at least one communication sub-zone in terms of the spatial location; and performing, by the terminal device, sidelink communication on a target resource pool corresponding to the identity of the communication sub-zone of the terminal device. The method, the terminal device, and the network device in the embodiments of the present application help to reduce the probability of conflict for a terminal device when performing sidelink communication.