Communication Control Apparatus for Partial Spectrum Use
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Solution Overview
Problem
Efficient utilization of underutilized radio frequency resources in wireless systems is hindered by the difficulty in distributing these resources among various wireless systems without causing interference to primary systems, especially when incumbent wireless systems occupy all available radio bands.
Innovation Solution
A communication control apparatus that periodically determines operation parameters for secondary wireless systems using the frequency bands of primary systems and decides on radio-wave use permissions for new systems, allowing immediate use without waiting for the next determination period by determining whether to forcibly stop secondary systems when primary systems use the radio waves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If cognitive radio technology is used to utilize underutilized radio waves, then radio frequency resource utilization is improved, but efficient distribution among multiple wireless systems becomes difficult
Solution Approach 1:
A communication control apparatus is introduced as an intermediary between primary and secondary wireless systems. This apparatus receives radio wave use requests from secondary systems, determines operation parameters, and coordinates spectrum sharing, thereby simplifying the complex distribution task among multiple wireless systems while improving radio frequency resource utilization
Solution Approach 2:
The communication control apparatus dynamically changes operation parameters (such as transmission power, frequency, time slots) of secondary wireless systems based on the usage patterns of primary systems. By adjusting these parameters in real-time, the system efficiently distributes underutilized radio waves among multiple secondary systems without causing interference to primary systems
2Device complexity
If operation parameters are determined periodically for secondary systems, then resource allocation is simplified, but new systems must wait for the next determination period causing delays
Solution Approach 1:
The communication control apparatus preliminarily determines whether a new secondary system should be forcibly stopped when primary systems use radio waves, before the next periodic operation parameter determination. This preliminary action allows new systems to receive immediate radio wave use permission without waiting for the next determination period, reducing delays while maintaining simple periodic allocation management
Solution Approach 2:
The system combines periodic determination with dynamic preliminary assessment for new systems. While operation parameters continue to be updated periodically for all systems, new systems undergo an immediate preliminary evaluation that can grant instant permission, creating a dynamic response that reduces waiting time without abandoning the simplified periodic management framework
3Productivity
If secondary systems are allowed to use radio waves immediately, then resource utilization efficiency is improved, but interference to primary systems may occur
Solution Approach 1:
The communication control apparatus performs preliminary anti-action by determining in advance whether a secondary system should be forcibly stopped when primary systems use radio waves. This preliminary determination prevents potential interference before it occurs, while still allowing secondary systems to use radio waves immediately under controlled conditions, thus maintaining high resource utilization efficiency without harmful interference to primary systems
Data Source
AI summary
A communication control apparatus (40) includes: a first determination unit (442) that periodically determines an operation parameter related to radio transmission of each of a single or a plurality of second wireless systems that perform wireless communication by utilizing a radio wave of a frequency band used by a single or a plurality of first wireless systems; a second determination unit (444) that determines, when a radio-wave use request is received from a new second wireless system in a determination period of the operation parameter, whether or not to define the new second wireless system as a system to be forcibly stopped when the first wireless system uses the radio wave; and a notification unit (445) that makes a notification to the new second wireless system regarding a radio-wave use permission before a next determination period of the operation parameter.