Dynamic Access Module for Wireless Data Collection Networks
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Solution Overview
Problem
Existing data collection systems face connectivity issues due to 'dead zones' in work environments, particularly where metal structures and water obstruct radio wave propagation, leading to costly solutions like increasing the number of access points and requiring wire-line connections.
Innovation Solution
A data collection system with a dynamic access module in each device that enables switching between infrastructure and ad hoc modes, allowing for continuous switching between communicating in IEEE 802.11 infrastructure and ad hoc modes to maintain connectivity, and incorporates self-healing and self-routing components for efficient data packet transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional access points are integrated into the system to eliminate dead zones, then network coverage and reliability are improved, but system cost and device complexity increase significantly
Solution Approach 1:
The data collection device dynamically switches between infrastructure mode (when access point is available) and ad hoc mode (when access point is unavailable), enabling adaptive operation that maintains connectivity without requiring additional fixed access points. This dynamic mode switching resolves the contradiction by making the system flexible rather than requiring more static infrastructure.
Solution Approach 2:
The device performs self-healing by automatically detecting connectivity loss and switching to ad hoc mode with peer devices to maintain network functionality. This self-service capability eliminates dead zones without requiring manual intervention or additional access points, reducing both cost and complexity while maintaining reliability.
2Area of stationary object
If additional access points are integrated into the system to eliminate dead zones, then network coverage is improved, but installation cost and wire-line infrastructure requirements increase
Solution Approach 1:
Peer data collection devices act as intermediaries to extend network coverage in ad hoc mode when access points are unavailable. Instead of installing additional access points with wire-line connections, the system uses existing devices to relay data, expanding coverage area without additional installation costs or wire-line infrastructure.
Solution Approach 2:
Data collection devices serve multiple functions: they act as both data collectors and network relays in ad hoc mode. This multi-functionality allows existing devices to extend network coverage without requiring dedicated access points, reducing installation costs and infrastructure requirements while expanding coverage area.
3Ease of operation
If the system uses fixed infrastructure mode only, then network management is simplified, but adaptability to different environments and connectivity conditions deteriorates
Solution Approach 1:
The system dynamically adapts between infrastructure mode and ad hoc mode based on environmental conditions and connectivity availability. This dynamic behavior maintains ease of operation through automated mode selection while significantly improving adaptability to different work environments, obstructions, and connectivity conditions.
Solution Approach 2:
The system changes its operational parameters (communication mode) based on detected conditions such as access point availability and obstruction presence. This parameter change enables the system to adapt to different environments while maintaining simplified operation through automated detection and switching, resolving the contradiction between ease of management and adaptability.
4Stability of the object's composition
If data collection devices remain stationary to maintain stable connections, then connection stability is improved, but mobility and operational flexibility deteriorate
Solution Approach 1:
The connection mode dynamically adapts to device mobility: infrastructure mode provides stable connections when devices are stationary and access points are available, while ad hoc mode maintains connectivity when devices move or access points are obstructed. This dynamic adaptation preserves connection stability regardless of device mobility, eliminating the need to choose between stability and flexibility.
Data Source
AI summary
There is described a data collection device that can incorporate an encoded information reading unit that can operate within a system including an access point that is wireline connected to a server. The encoded information reading unit can include at least one of a bar code reading unit, an RFID tag reading unit and a credit/debit card reading unit. Further incorporated in the data collection device can be dynamic access module. The dynamic access communication module enables the data collection device to participate in a self organized network that supports multi-hop data packet transmissions between data collection devices and which further enables the device to transmit data received from a peer device to the system access point.