Multi-Channel Sensor Network Control Information Transmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional sensor networks are limited by the transfer rate on a single wireless channel, which restricts the number of acceptable devices and fixed transfer rate, especially in multi-tier PAN structures where devices share a common channel, leading to inefficient resource utilization and limited communication coverage.
Innovation Solution
Implementing a method and device that support multi-channel operation by transmitting control information and data using a wireless frame structure, where control information is sent on an idle channel selected from multiple channels, and data is transmitted based on resource assignment information, enhancing wireless resource utilization and system throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If time-division multiplexing scheme is applied to share resources among multiple sensor devices on one channel, then device sharing capability is improved, but transfer rate is limited
Solution Approach 1:
The patent transitions from single-channel operation to multi-channel operation, adding the channel dimension to the communication system. By utilizing multiple channels simultaneously, the system can serve multiple sensor devices without being constrained by the transfer rate limitations of a single channel, thus resolving the contradiction between device sharing capability and transfer rate.
Solution Approach 2:
The patent segments the communication system into multiple independent channels, allowing different sensor devices to transmit data on different channels simultaneously. This segmentation enables parallel data transmission across multiple channels, thereby improving overall transfer rate while maintaining the ability to share resources among multiple devices.
2Reliability
If one PAN is configured per channel, then channel resource isolation is improved, but system complexity increases
Solution Approach 1:
The patent merges multiple PANs across different channels into a unified multi-channel sensor network system. Instead of managing separate PANs for each channel, the system integrates them into a single coordinated network that can utilize multiple channels simultaneously, thereby reducing system complexity while maintaining channel resource isolation through logical channel identification and management.
3Productivity
If multiple channels are used for transmission, then system throughput is improved, but channel management complexity increases
Solution Approach 1:
The patent implements feedback mechanisms where sensor devices report their transmission status and channel usage information back to the PAN coordinator. This feedback enables the coordinator to dynamically adjust channel assignments and management strategies, simplifying the complexity of multi-channel management while optimizing system throughput through adaptive resource allocation.
Solution Approach 2:
The patent introduces dynamic channel assignment and management capabilities, allowing the system to adaptively select and switch between channels based on real-time conditions. This dynamic approach enables the system to optimize throughput by utilizing available channels efficiently while managing complexity through flexible, condition-based channel selection rather than rigid fixed assignments.
Data Source
AI summary
A method of transmitting control information by an end node in a wireless communication system supporting multi-channel transmission includes: transmitting control information to a center node on a first channel among multiple channels within a control period of a wireless frame when the first channel is in an idle state; transmitting the control information to the center node on a second channel when the first channel is not in the idle state and the second channel is in the idle state, the second channel being selected from channels other than the first channel among the multiple channels; and transmitting the control information to the center node in a subsequent wireless frame when the second channel is not in the idle state.