Subscriber Station Security Key Management for Cooperative Base Stations
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Solution Overview
Problem
In high-frequency band wireless communication systems, the frequent handover of subscriber stations between base stations increases overhead due to the need for repeated verification and key management procedures, which complicates secure data transmission and reception.
Innovation Solution
A method and device for managing security keys in cooperative communication systems, where subscriber stations and base stations generate and transmit input values to create unique security keys for data transmission and reception, enabling efficient authentication and encryption across multiple base stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the number of base stations increases to cover a service area in high frequency band, then the service coverage is improved, but the overhead of handover and verification procedures increases
Solution Approach 1:
The patent applies preliminary action by pre-generating input values for security key generation at the subscriber station before handover occurs. When a base station change is anticipated, the subscriber station already has the necessary input values ready, allowing the new base station to quickly generate security keys without waiting for post-handover verification procedures. This reduces the overhead and delay associated with frequent handovers in high-frequency band systems with many base stations.
2Reliability
If verification procedures are performed frequently for each base station change, then communication security is maintained, but system overhead and processing time increase
Solution Approach 1:
The patent implements preliminary action by generating input values for security key generation in advance at the subscriber station. These pre-generated input values are stored and can be immediately used when a base station change occurs, eliminating the need for time-consuming verification procedures after handover. The security keys can be rapidly generated at the new base station using the pre-prepared input values, thus maintaining security while reducing processing time.
Solution Approach 2:
The subscriber station performs self-service by autonomously generating and managing the input values for security key generation. Instead of relying on the network infrastructure to perform verification procedures, the subscriber station independently prepares the necessary cryptographic materials in advance, reducing the burden on the network and minimizing the time required for security verification during handover.
3Reliability
If multiple base stations serve a single subscriber station for cooperative communication, then communication reliability is improved, but security key management complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the security key management into separate input values for each base station. The subscriber station generates distinct input values for each serving base station in the cooperative communication group. This segmentation allows each base station to independently generate its own security key using its specific input value, simplifying the overall key management architecture while supporting multiple base stations simultaneously.
Solution Approach 2:
The patent uses preliminary action by pre-generating and storing separate input values for each base station that may serve the subscriber station. When the set of serving base stations changes due to handover or cooperative communication reconfiguration, the subscriber station already has the appropriate input values ready, allowing immediate security key generation at the new base stations without additional verification overhead.
Data Source
AI summary
A subscriber station performs a method for managing a security key. The method includes generating, for each of the base stations, an input value for generation of the security key for data transmission and reception with the each base station; transmitting, to the each base station, the input value for a corresponding base station; and generating the security key of the corresponding base station by using the input value of the each base station. A base station provides cooperative communication to the subscriber station.