D2D Discovery Resource Allocation Signaling
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing device-to-device (D2D) discovery resources, particularly in determining the allocation and utilization of D2D discovery resources by user devices, which is crucial for seamless D2D communication, especially when user devices transition between different base station coverage areas.
Innovation Solution
A method and apparatus for managing D2D discovery resources, where user devices request allocations from base stations, receive responses indicating whether resources are common or dedicated, and include mechanisms for identifying resource usage duration and identifiers for resource blocks, enabling efficient D2D communication by facilitating resource reallocation and release across different base station coverage areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If user devices autonomously select D2D discovery resources from common pools, then resource allocation flexibility is improved, but resource collision and interference increase
Solution Approach 1:
The patent segments D2D discovery resources into two distinct types: common D2D discovery resources (available for autonomous selection by multiple devices) and dedicated D2D discovery resources (allocated to specific devices). This segmentation allows devices to choose from common resources when flexibility is needed, while dedicated resources provide collision-free communication when reliability is prioritized, thus resolving the contradiction between flexibility and reliability.
2Reliability
If dedicated D2D discovery resources are allocated to user devices, then resource collision is reduced, but base station signaling overhead increases
Solution Approach 1:
The patent implements partial dedication of resources by introducing a reuse factor parameter that controls how many devices can reuse the same dedicated resources. When reuse factor is high, more devices share dedicated resources, reducing signaling overhead. When reuse factor is low, fewer devices share, reducing collisions. This partial action approach balances the contradiction between reliability and signaling overhead.
3Productivity
If common D2D discovery resources are used by multiple devices, then resource utilization efficiency is improved, but device complexity for resource management increases
Solution Approach 1:
The patent implements feedback mechanisms where devices monitor resource usage and collision conditions, then adjust their resource selection strategy. Devices receive feedback about resource availability and collision levels, and autonomously adapt their selection from common resources or request dedicated resources. This feedback-driven approach simplifies device complexity by providing clear guidance while maintaining high resource utilization efficiency.
Data Source
AI summary
A user device may transmit a request to a base station for an allocation of device-to-device (D2D) discovery resources. In response to the request, the user device may receive from the base station a response that indicates whether the D2D discovery resources allocated to the user device are common or dedicated.