Cognitive Channel Switching for Zero-Delay Wireless Data Services
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Solution Overview
Problem
Current serial scheduling methods in wireless network communications result in significant interruptions of data services due to the need for frequent channel switching caused by incumbent signal detection, leading to delays of up to 4 seconds per switch and repeated interruptions as new channels may also carry incumbent signals.
Innovation Solution
A system and method for cognitive channel switching among a cluster of channels, where each channel is set up to transmit data services and store parameters, allowing for zero-delay switching between channels within the cluster, eliminating the need for repeated channel setup and minimizing service interruptions by using a channel setup module, spectrum sensing device, and channel switching module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If serial scheduling is used to detect incumbent signals, then spectrum sensing can be performed, but data services experience significant interruptions up to 4 seconds per channel switch
Solution Approach 1:
The patent pre-configures multiple channels with their parameters stored in a database before operation begins. When channel switching is needed, the system can immediately retrieve and activate pre-prepared channel parameters, eliminating the need for time-consuming channel setup during incumbent signal detection events.
Solution Approach 2:
The patent introduces a channel cluster as an intermediary structure between the data services and the incumbent signal detection process. The cluster contains multiple pre-configured channels that can be rapidly switched between, acting as a buffer that prevents direct interruption of data services when channel changes are required.
2Object-affected harmful factors
If channel switching is performed frequently to avoid incumbent signals, then signal interference is reduced, but service continuity deteriorates due to repeated setup delays
Solution Approach 1:
Multiple channels are pre-configured and stored in the database with all necessary parameters before operation. This preliminary preparation allows the system to perform frequent channel switching to avoid incumbent signals while maintaining service continuity, as the switching operation itself is rapid and does not require time-consuming setup procedures.
Solution Approach 2:
The system changes operational parameters by switching between pre-configured channel parameters stored in the database. This allows rapid adaptation to avoid incumbent signal interference while maintaining continuous data service transmission, as the parameter changes are retrieved and applied without requiring full channel reconfiguration.
3Device complexity
If a single channel is used for data services, then device complexity is reduced, but adaptability worsens when incumbent signals are detected
Solution Approach 1:
The patent segments the channel resource into a cluster of multiple channels, each with its own pre-configured parameters stored in the database. This segmentation allows the system to maintain simple device complexity by using a structured approach while significantly improving adaptability, as the system can switch between segmented channel options when incumbent signals are detected.
Solution Approach 2:
The channel cluster structure provides multi-functionality by enabling the system to perform both simple data transmission and adaptive incumbent signal avoidance using the same infrastructure. The pre-configured parameters in the database serve universal purposes, supporting rapid channel switching while maintaining a relatively simple overall device structure.
Data Source
AI summary
Data service transmission interruption is minimized by initially setting up a cluster of channels to transmit data services. As the need arises to switch channels due to the detection of an incumbent signal, the data services can be switched with substantially no delay. A group of channels from those available in a wireless network are chosen to form a cluster of channels. Each channel within the cluster is set up to convey data services with channel parameters being stored. A first operating channel is chosen from among the cluster of channels to transmit the data services. While the data services are being transmitted on the first operating channel, out-of-band spectrum sensing occurs on the other channels. Upon predetermined criteria a channel switch occurs. As each channel has already been set up the necessary channel parameters are retrieved from storage and restored without data service interruption.