Dynamic SPS Resource Activation for V2X Communication
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Solution Overview
Problem
In LTE networks for Internet of Vehicles communication, semi-persistent scheduling (SPS) with short intervals leads to wastage of scheduling resources due to non-periodic V2X services, and existing methods fail to efficiently manage resource allocation and utilization.
Innovation Solution
A method where a second device configures different SPS resources for a first device, activates suitable resources based on service requirements, and allocates unused resources to other devices, using SPS configuration information, activation information, and instruction signals to optimize resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If SPS with short scheduling interval is used to respond to sudden data transmission, then responsiveness to non-periodic V2X services is improved, but scheduling resource waste increases
Solution Approach 1:
The patent implements dynamic SPS resource management where the network device can activate or deactivate SPS resources based on real-time service requirements. When V2X data transmission is needed, SPS resources are activated; when not needed, they are deactivated. This dynamic adjustment allows the system to respond quickly to non-periodic services while avoiding resource waste during idle periods, resolving the contradiction between responsiveness and resource efficiency.
2Ease of operation
If SPS resources are allocated for periodic transmission, then resource allocation simplicity is improved, but resource utilization efficiency deteriorates when services are non-periodic
Solution Approach 1:
The patent uses periodic SPS resource configuration as the base structure, which maintains allocation simplicity. However, it introduces activation and deactivation mechanisms that allow these periodic resources to be selectively used only when needed. The network device sends activation indications to start SPS resources when V2X services require transmission, and can deactivate them when not needed, thus maintaining the simplicity of periodic allocation while improving actual utilization efficiency for non-periodic services.
3Reliability
If SPS resources are continuously allocated to ensure availability, then service reliability is improved, but resource waste increases for non-periodic services
Solution Approach 1:
The patent pre-configures SPS resources in advance with proper parameters including scheduling interval, resource size, and validity duration. These resources are allocated and stored ready for use, ensuring immediate availability when needed (improving reliability). The network device can then activate these pre-configured resources on-demand rather than continuously using them, allowing rapid deployment for non-periodic V2X services while avoiding continuous resource consumption and waste.
Data Source
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AI summary
The present invention relates to the wireless communications field, and provides a scheduling method, a device, and a system, to resolve a problem that a scheduling resource is wasted when SPS transmission with a relatively short scheduling interval is applied to a V2X service. The scheduling method provided in the present invention includes: receiving, by a first device, semi-persistent scheduling SPS configuration information from a second device, where the SPS configuration information is used to indicate an SPS resource configuration used by the second device; receiving, by the first device, SPS activation information from the second device, where the SPS activation information is used to indicate an activated SPS resource, and the activated SPS resource is one or more SPS resources in the SPS resource configuration; and sending, by the first device, the SPS instruction information to the second device, where the SPS instruction information is used to instruct to use or not to use a scheduling resource of the activated SPS resource. Embodiments of the present invention are applied to V2X communication.