D2D Resource Selection Using Geo-Location Awareness
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Solution Overview
Problem
Current device-to-device (D2D) communication systems in cellular networks face challenges in efficiently reusing resources without causing interference, especially during peak usage when all resources are fully loaded, and require significant signaling overhead to manage resource allocation.
Innovation Solution
The system and method involve D2D devices receiving geo-location information from the cellular communications system to select resources that minimize interference with cellular transmissions, allowing D2D devices to reuse resources even when they are fully utilized by cellular users, using techniques such as geo-location awareness and low transmission power levels to avoid interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If D2D devices reuse cellular resources during peak usage, then resource utilization efficiency is improved, but interference to cellular transmissions increases
Solution Approach 1:
The system applies local quality by providing geo-location information to D2D devices, enabling them to identify specific geographic areas where cellular transmissions are active. D2D devices then selectively avoid using cellular resources only in those local areas while freely reusing resources in areas without cellular activity, thus achieving both high resource utilization and minimal interference.
Solution Approach 2:
The system implements preliminary action by having the cellular communications system proactively provide geo-location information to D2D devices before D2D transmissions occur. This advance information allows D2D devices to pre-determine which cellular resources to avoid in specific geographic areas, enabling efficient resource reuse without causing interference.
2Productivity
If D2D devices use cellular resources, then communication capacity is improved, but signaling overhead increases
Solution Approach 1:
The system applies self-service by enabling D2D devices to autonomously select and use cellular resources based on geo-location information they receive. The cellular communications system only needs to provide the initial geo-location data, after which D2D devices independently make resource selection decisions without requiring continuous signaling or explicit resource allocation messages, thereby minimizing signaling overhead.
3Reliability
If D2D devices transmit at higher power levels, then transmission reliability is improved, but interference to cellular users increases
Solution Approach 1:
The system applies local quality by enabling D2D devices to adjust their transmission power levels based on their geographic location. In areas where geo-location information indicates active cellular transmissions, D2D devices transmit at lower power levels to avoid interference. In areas without cellular activity, D2D devices can transmit at higher power levels to ensure reliable communication, thus achieving both transmission reliability and minimal interference.
Data Source
AI summary
A method for operating a first device-to-device (D2D) device in a cellular communications system includes receiving geo-location information from a first entity in the cellular communications system, the geo-location information including location information for cellular users of the cellular communications system and resources of the cellular communications system available to the cellular users, selecting one of the resources to avoid causing interference to a cellular transmission, the resource being selected in accordance with the geo-location information, and transmitting to a second D2D device over the selected resource.