Coordinator Broadcast Filter for Secure M2M Device Association
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Solution Overview
Problem
Existing wireless M2M sensor networks require manual configuration of devices for network deployment and updates, leading to scalability issues and challenges in automatic security key distribution, especially in overlapping networks.
Innovation Solution
A method and system for a coordinator to obtain a token identifying a radio device, verify authorization, and broadcast a device filter using a Bloom filter to automatically connect authorized devices, reducing manual configuration and enabling secure association.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual configuration is used for M2M device deployment, then network security and control are improved, but deployment complexity and time consumption increase significantly
Solution Approach 1:
Device tokens are pre-configured in M2M devices during manufacturing or provisioning, and the coordinator maintains a pre-established device filter containing tokens of authorized devices. This preliminary configuration eliminates the need for manual device-by-device setup during deployment, allowing devices to automatically join the network by matching their pre-configured tokens against the coordinator's device filter.
2Reliability
If manual configuration is required for each device, then network control and security are maintained, but scalability is severely limited
Solution Approach 1:
Instead of manually configuring each individual device, the system uses a device filter that contains copies (tokens) of authorized device identifiers. The coordinator broadcasts this filter to multiple devices simultaneously, allowing批量 authorization. Each device independently checks its token against the broadcasted filter, enabling scalable deployment while maintaining centralized control through the filter management.
3Ease of operation
If devices automatically connect to the strongest beacon signal, then connection simplicity is improved, but network security deteriorates as devices may attach to wrong coordinators
Solution Approach 1:
The device filter acts as an intermediary authorization mechanism between the coordinator and devices. Instead of devices directly trusting the strongest signal, the filter serves as a verification layer that mediates the connection process. Devices use their pre-configured tokens to query the coordinator's device filter, and only devices with matching tokens are authorized to join, preventing unauthorized attachments while maintaining automatic connection simplicity.
Data Source
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AI summary
The present disclosure relates to a method in a coordinator (2) in a radio communication network (1). The method comprises obtaining a token identifying a radio device (3). The method also comprises obtaining information confirming that the radio device is authorised to connect to the coordinator. The method also comprises calculating a device filter comprising a plurality of tokens, wherein the plurality of tokens include the obtained token of the radio device and identifies a plurality of devices authorised to connect to the coordinator. The method also comprises sending a broadcast radio signal comprising the device filter. The method also comprises allowing the radio device to connect to the coordinator. The present disclosure also relates to a coordinator, as well as to a radio device and a method of a radio device.