D2D Radio Resource Prioritization to Avoid Collision Interference
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Solution Overview
Problem
In device-to-device (D2D) communications, the lack of centralized control for radio resource allocation leads to increased likelihood of collisions and interference, as well as difficulty in prioritizing transmissions among terminal devices.
Innovation Solution
Implementing a method and apparatus for D2D communications where terminal devices select radio resources based on a priority status associated with the data and reserve certain subframes for high-priority transmissions, allowing other devices to interrupt or avoid using these resources if they have urgent data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If terminal devices autonomously select radio resources for D2D communications without centralized control, then communication flexibility and autonomy are improved, but the likelihood of collisions and interference increases
Solution Approach 1:
The patent segments the radio resources into multiple priority levels (high priority and low priority resources). Terminal devices select resources based on the priority of their data, which divides the resource selection space and reduces the probability of collisions between devices with different priority requirements. This segmentation allows autonomous selection while maintaining reliability through structured resource partitioning.
Solution Approach 2:
The patent applies local quality by assigning different resource pools to different priority levels. High priority data transmissions use dedicated high priority resources, while low priority data uses low priority resources. This local differentiation of resource quality ensures that critical communications are protected from interference with lower priority traffic, resolving the contradiction between autonomous selection and collision avoidance.
2Adaptability or versatility
If terminal devices autonomously select radio resources without centralized control, then device autonomy is improved, but the ability to prioritize transmissions among devices deteriorates
Solution Approach 1:
The patent implements preliminary action by pre-configuring multiple priority levels and associated resource pools before D2D communications occur. The network provides configuration information including high priority and low priority resources to terminal devices in advance. This allows devices to autonomously select appropriate resources based on data priority without requiring real-time centralized coordination, thus maintaining both autonomy and prioritization capability.
Solution Approach 2:
The patent enables self-service by allowing terminal devices to independently determine the priority of their data and autonomously select from appropriate resource pools based on pre-configured priority levels. Devices monitor their own transmission needs and self-manage resource selection according to the priority status of their data, eliminating the need for continuous centralized scheduling while maintaining effective prioritization.
3Productivity
If multiple terminal devices transmit on the same radio resources simultaneously, then resource utilization is improved, but interference and collision increase
Solution Approach 1:
The patent segments radio resources into high priority and low priority pools, allowing simultaneous transmissions within each segment while preventing interference between segments. This segmentation enables high resource utilization by keeping all resources active, while the hierarchical structure ensures that high priority transmissions are protected from low priority interference, thus resolving the contradiction between utilization and interference.
Solution Approach 2:
The patent changes the parameter of resource priority classification to manage interference. By introducing priority levels as a distinguishing parameter, the system allows multiple devices to transmit simultaneously on different priority levels without mutual interference. High priority transmissions can preempt low priority resources when necessary, maintaining high resource utilization while controlling interference through parameter-based differentiation.
Data Source
AI summary
A method of operating a first terminal device to transmit data to a second terminal device by performing device-to-device communication includes selecting radio resources, on which to transmit the data based on a priority status associated with the data, whereby certain radio resource are reserved for use in association with data classified as high priority. A method of operating the second terminal device to receive data from the first terminal device includes: receiving data from the first terminal device using the selected radio resources; determining if another terminal device is transmitting data on a radio resource which is not selected for transmitting data by the first terminal device and which is reserved for transmitting data classified as having a high priority; and, if so, stopping reception of data from the first terminal device on the selected radio resources and instead seeking to receive further transmissions from the other terminal device.