Millimeter Wave D2D Spectrum Allocation via CBRS MAS
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Solution Overview
Problem
Conventional device-to-device (D2D) communication processes are inefficient due to base station management of spectrum, leading to decreased bandwidth utilization efficiency, especially in shared spectrum networks like Citizens Broadband Radio Service (CBRS), where D2D communications cannot be easily switched off once initiated.
Innovation Solution
A millimeter wave access system and method that allows Citizens Broadband Radio Service (CBRS) devices to register with a millimeter wave spectrum access system, allocate spectrum based on device type, location, and other parameters, enabling D2D communication links and automatically releasing spectrum when no longer needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If base station manages spectrum for D2D communication, then D2D communication can be established, but bandwidth utilization efficiency decreases
Solution Approach 1:
The patent extracts the spectrum management function from the base station and transfers it to the mobile devices themselves. Each mobile device autonomously selects and uses spectrum resources for D2D communication without base station intervention, thereby improving bandwidth utilization efficiency while maintaining reliable D2D communication establishment through device-autonomous spectrum selection mechanisms
Solution Approach 2:
Mobile devices perform self-service by autonomously managing their own spectrum resources for D2D communication. The devices independently identify available spectrum, select appropriate frequency resources, and maintain communications without requiring base station spectrum allocation, thus eliminating the bandwidth utilization efficiency problem caused by base station management
2Quantity of substance
If shared spectrum is used for D2D communication, then spectrum resources are utilized, but interference increases and spectrum cannot be released when no longer needed
Solution Approach 1:
The patent implements feedback mechanisms where mobile devices continuously monitor the D2D communication status and spectrum usage conditions. When D2D communication ends or idle time thresholds are exceeded, devices provide feedback to release spectrum resources back to the shared pool, thereby reducing interference while maintaining efficient spectrum resource utilization through dynamic allocation and release
Solution Approach 2:
The system dynamically adjusts spectrum allocation based on real-time communication needs. Mobile devices can dynamically select spectrum for active D2D communication and dynamically release it when communication ends, creating a flexible spectrum management system that reduces interference through opportunistic usage while maximizing resource utilization during active communications
3Reliability
If D2D communication is initiated in shared spectrum, then communication can occur, but spectrum cannot be switched off when no longer needed
Solution Approach 1:
Mobile devices autonomously manage the lifecycle of D2D communications including spectrum acquisition and release. When communication ends or idle thresholds are met, devices automatically release spectrum resources without requiring base station commands, making the system easy to operate while maintaining reliable communication capability throughout the active period
Solution Approach 2:
The system employs periodic monitoring of D2D communication status with defined idle time thresholds. If no data transmission occurs within these periodic intervals, the system automatically triggers spectrum release, providing easy operation through automated periodic checks while ensuring communication reliability during active data exchange periods
Data Source
AI summary
Millimeter wave access system and method for device-to-device communications (D2D) are described. A method includes registering, by one or more Citizens Broadband Radio Service (CBRS) devices (CBSDs) with a millimeter wave spectrum access system (MAS), establishing, by mobile devices, connections with a CBSD, receiving D2D communication mode capability from the mobile devices, receiving millimeter wave spectrum allocation requests for D2D communication from a number of the plurality of mobile devices, determining, by the MAS, millimeter wave spectrum allocation for the requests, sending, by the MAS and the CBSD, appropriate millimeter wave spectrum allocations to each of requesting mobile device and enabling D2D communication mode, establishing D2D communication links with other mobile devices to exchange data, monitoring idle time percentage on the D2D communication links, informing when D2D communication is not needed based on the idle time percentage, and releasing allocated millimeter wave spectrum when D2D communication is not needed.