CBP Packet Transmission in Cognitive Radio Systems
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In Cognitive Radio (CR)-based wireless communication systems, the limited Self-Coexistence Window (SCW) slots lead to collisions during the transmission of Coexistence Beacon Protocol (CBP) packets, which can result in system operation failures due to incorrect reception of communication information.
Innovation Solution
A method and apparatus that identify the SCW regular pattern of neighbor Wireless Regional Area Networks (WRANs), select a proper contender for contention, and configure the SCW usage pattern to double the usage period when winning contention, thereby avoiding collisions and optimizing SCW slot sharing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple Base Stations transmit CBP packets simultaneously in limited SCW slots, then information sharing between BSs is enabled, but transmission collisions occur leading to system operation failures
Solution Approach 1:
The patent applies preliminary action by having BSs identify SCW regular patterns of neighbor WRANs before transmitting CBP packets. This advance identification allows BSs to select appropriate transmission timing and contenders, preventing collisions before they occur. The SCW usage pattern is configured in advance based on identified patterns, ensuring reliable transmission while maintaining efficient slot utilization.
2Reliability
If SCW usage period is extended to reduce contention, then CBP packet transmission reliability improves, but system responsiveness to channel changes decreases
Solution Approach 1:
The patent applies dynamics by making the SCW usage period configurable and adaptable. Instead of a fixed period, the system dynamically adjusts the SCW usage period based on channel conditions and contention requirements. When channel conditions change or contention is detected, the SCW usage period can be extended to improve reliability. This dynamic adjustment maintains system responsiveness while ensuring reliable CBP packet transmission when needed.
Data Source
AI summary
A method of and apparatus for operating a Coexistence Beacon Protocol (CBP) packet transmitter in a Cognitive Radio (CR)-based wireless communication system is provided. The method includes, identifying a Self-Coexistence Window (SCW) regular pattern of neighbor Wireless Regional Area Networks (WRANs), if vacant SCW slots are not periodically occurring, selecting a WRAN as a contender among the neighbor WRANs, performing a contention for transmitting the CBP packet with the contender within SCW slots that are occupied by the WRAN, and configuring an SCW usage pattern so that an SCW usage period of the CBP packet sender is double that of an SCW usage period of the contender when winning in the contention.