Base Station Semi-Persistent Scheduling for V2X Resource Allocation
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Solution Overview
Problem
V2X communication systems face challenges in efficiently utilizing resources due to the need for high reliability, low latency, and increased capacity to accommodate a larger number of terminals, particularly in scenarios involving vehicle-to-everything (V2X) communications, where conventional D2D communication methods are inadequate.
Innovation Solution
The implementation of a base station, terminal device, and communication method that leverage frequency division multiplexing (FDM) and semi-persistent scheduling (SPS) to optimize resource allocation, utilizing position information for space reuse and enhancing the PC5 interface to support V2X communication requirements, including the use of energy sensing and SA decoding for resource selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional D2D communication methods are used, then implementation simplicity is maintained, but resource utilization efficiency deteriorates and capacity is insufficient for V2X communication requirements
Solution Approach 1:
The resource pool is segmented into multiple resource blocks that can be independently allocated to different terminals. The base station divides available time-frequency resources into discrete units, allowing efficient allocation to multiple V2X terminals simultaneously, thereby improving resource utilization efficiency while maintaining manageable system complexity through structured organization.
Solution Approach 2:
The patent introduces spatial dimension through position information-based resource allocation. Terminals are allocated resources not only in time-frequency domain but also in spatial domain based on their geographic positions. This dimensional expansion enables space reuse where terminals in different locations can use the same time-frequency resources, significantly improving capacity and resource utilization for V2X communication.
2Quantity of substance
If more terminals are accommodated in V2X communication, then system capacity increases, but resource contention increases and resource utilization efficiency deteriorates
Solution Approach 1:
By incorporating spatial position information as an additional dimension for resource allocation, the system enables multiple terminals to be accommodated simultaneously without excessive resource contention. Terminals at different positions are allocated the same time-frequency resources through spatial separation, effectively increasing system capacity while maintaining resource utilization efficiency through space reuse.
Solution Approach 2:
The patent dynamically adjusts resource allocation parameters based on terminal position, traffic conditions, and resource availability. The base station modifies allocation decisions in real-time by changing which time-frequency-spatial combinations are assigned to which terminals, optimizing resource utilization efficiency even as the number of terminals fluctuates.
3Productivity
If position information is used for space reuse, then resource utilization efficiency improves, but measurement and detection complexity increases
Solution Approach 1:
The base station acts as an intermediary that centralizes position information acquisition and processing. Rather than requiring terminals to perform complex mutual position detection, the base station obtains position information (from GPS or other sources) and uses it to make resource allocation decisions. This mediator approach improves resource utilization through space reuse while reducing measurement and detection complexity at the terminal side.
Data Source
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AI summary
[Object] To provide a mechanism that enables resources to be efficiently utilized in V2X communication. [Solution] A base station including: a communication unit configured to perform radio communication; and a processing unit configured to allocate resources in semi-persistent scheduling for inter-terminal communication performed between a plurality of terminal devices and perform control such that control information regarding the allocation of the resources is transmitted to the terminal devices via the radio communication.