D2D Resource Allocation via Dynamic Mode Switching
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Solution Overview
Problem
In scenarios with poor macro network coverage, direct terminal-to-terminal communication (D2D) may experience interruptions due to the unavailability of resources, leading to discontinuity in D2D communication services.
Innovation Solution
A resource allocation method that dynamically switches between two modes: direct scheduling and pre-distributing a time-frequency resource pool based on the D2D terminal's location and available resources, ensuring continuous communication by predicting resource needs and adjusting allocation modes accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If direct scheduling mode (mode A) is used for D2D communication, then resource allocation efficiency is improved, but communication reliability deteriorates in poor network coverage areas
Solution Approach 1:
The patent implements dynamic switching between direct scheduling mode (mode A) and shared resource mode (mode B) based on the terminal's connection status with the base station. When the terminal maintains good connection, mode A is used for efficient resource allocation. When connection deteriorates or is lost, the system switches to mode B where terminals use pre-configured resource pools, ensuring continuous D2D communication reliability in poor coverage areas.
Solution Approach 2:
The system changes the resource allocation parameter dynamically by switching between two distinct allocation modes. The base station configures resource pools in advance for mode B, and when switching occurs, the terminal transitions from receiving dynamic grants (mode A) to using pre-configured resources (mode B), adapting the allocation parameters to current network conditions.
2Reliability
If shared resource mode (mode B) is used for D2D communication, then communication continuity is improved, but resource allocation efficiency deteriorates
Solution Approach 1:
The system dynamically selects between mode A and mode B based on real-time connection quality. Mode B with pre-configured resource pools is activated only when necessary (poor coverage or connection loss), ensuring communication continuity while minimizing the impact on overall resource allocation efficiency by using the more efficient mode A when conditions permit.
3Adaptability or versatility
If mode switching is implemented based on connection status, then adaptability to network conditions is improved, but system complexity increases
Solution Approach 1:
The base station monitors the terminal's connection status and provides feedback through RRC connection state information. This feedback mechanism enables automatic mode switching without complex terminal-side decisions. The base station determines when to switch between mode A and mode B based on observed connection quality, simplifying the overall system complexity while maintaining high adaptability to network conditions.
Data Source
AI summary
The present disclosure provides a resource allocation method and system used for direct terminal-to-terminal communication, a device having base station functionality, and a terminal. The resource allocation method includes: obtaining time-frequency resource usage of the device having the base station functionality and/or state information of each D2D terminal within a coverage area of the device having the base station functionality; determining an allocation mode of allocating time-frequency resource to the each D2D terminal, according to the time-frequency resource usage of the device having the base station functionality and/or the state information of the each D2D terminal; and allocating time-frequency resource used for the direct terminal-to-terminal communication to the each D2D terminal according to the allocation mode, so as to enable the each D2D terminal to use the allocated time-frequency resource to perform the direct terminal-to-terminal communication.