Wireless Relay Node Skipping Encryption to Reduce Latency
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Solution Overview
Problem
Conventional relay communications in Home Mesh APs face challenges in achieving low latency and high reliability due to lack of retransmission control between links and excessive packet buffering in Relay Nodes, which is incompatible with the required wireless characteristics.
Innovation Solution
A wireless communication device that performs retransmission processing and sets up relay communication by skipping encryption and decryption processing, directly generating an encryption key, and optimizing memory usage in Relay Nodes to reduce latency and enhance reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If encryption processing is performed in the Relay Node, then security is improved, but latency increases and reliability deteriorates due to additional processing time and packet buffering
Solution Approach 1:
The patent extracts the encryption processing function from the Relay Node and relocates it to the Source Node. The Relay Node is configured to forward packets without performing encryption or decryption operations, thereby eliminating the latency and reliability issues caused by encryption processing in the relay path while maintaining security through direct encryption at the source
Solution Approach 2:
The patent introduces a key management mechanism where the Source Node and Destination Node directly exchange encryption keys without the Relay Node's involvement in the cryptographic operations. The Relay Node acts merely as a transparent intermediary that forwards encrypted packets without accessing or processing the encryption keys
2Reliability
If packet buffering is performed in the Relay Node, then retransmission control is improved, but latency increases and the system becomes incompatible with low-latency requirements
Solution Approach 1:
The patent segments the retransmission control function and applies it independently to each link separately. The Source Node performs retransmission control for the backhaul link to the Relay Node, and the Destination Node performs retransmission control for the fronthaul link from the Relay Node, eliminating the need for centralized buffering in the Relay Node while maintaining reliable retransmission on each link
Solution Approach 2:
The patent extracts the packet buffering function from the Relay Node and relocates buffering operations to the endpoint nodes (Source Node and Destination Node). This eliminates latency caused by relay-side buffering while maintaining the ability to perform retransmission control through link-specific buffering at the endpoints
3Reliability
If relay communication is set up with encryption processing, then security is improved, but device complexity increases due to additional encryption key management and processing requirements
Solution Approach 1:
The patent extracts the encryption key management complexity from the Relay Node and concentrates it entirely at the Source Node and Destination Node. The Relay Node is configured with minimal functionality for relay communication, forwarding packets without requiring encryption keys or cryptographic processing capabilities, thereby significantly reducing device complexity at the relay while maintaining security through endpoint encryption
Data Source
AI summary
The present technology relates to a wireless communication device and method capable of improving low latency and high reliability.The wireless communication device performs retransmission processing with each of a first other wireless communication device and a second other wireless communication device in response to a request signal transmitted from the first other wireless communication device or the second other wireless communication device, and performs a setting of relay communication in which encryption processing and decryption processing are skipped. The present technology can be applied to a wireless communication system.