Radio Node Local Loopback Using Asymmetric Encryption
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The split-stack architecture in wireless communication networks, particularly in LTE, does not readily accommodate local loopback functions for local traffic, leading to security risks and cumbersome trust requirements for distributing ciphering keys between radio access points and gateway nodes.
Innovation Solution
Implementing a radio node with a local loopback mode that uses asymmetric or public-private key pair encryption for local traffic, allowing the radio node to loop traffic between devices without needing symmetric encryption keys, thereby reducing security risks and simplifying key distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If symmetric encryption keys are distributed between radio access points and gateway nodes for secure traffic handling, then security is improved, but device complexity and trust requirements increase
Solution Approach 1:
The patent introduces asymmetric encryption (public-private key pairs) as an intermediary mechanism between symmetric key distribution and plaintext communication. The radio access point and gateway node exchange public keys instead of symmetric keys, allowing secure communication without direct symmetric key sharing. This mediator approach resolves the contradiction by maintaining security through cryptographic intermediaries while reducing trust requirements.
Solution Approach 2:
The patent changes the cryptographic parameter from symmetric keys to asymmetric key pairs. This parameter change fundamentally alters the security model: instead of requiring both parties to share and protect identical secret keys, each party generates its own key pair and shares only the public component. This transformation maintains security while eliminating the complexity of symmetric key distribution and trust management.
2Reliability
If all traffic is forwarded to the gateway node for processing in split-stack architecture, then security is improved, but productivity and network efficiency deteriorate
Solution Approach 1:
The patent applies local quality by enabling the radio access point to perform local loopback operations for traffic that originates and terminates within the same cell. Instead of uniformly forwarding all traffic to the gateway node, the system selectively handles local traffic locally while maintaining gateway involvement for other traffic. This localized processing improves network efficiency while security is maintained through asymmetric encryption verification at the gateway.
Solution Approach 2:
The patent segments traffic handling into two distinct paths: local loopback path for intra-cell traffic and gateway forwarding path for other traffic. This segmentation allows the system to optimize each path independently - local traffic bypasses the gateway for efficient processing, while other traffic maintains security through gateway involvement. The segmentation resolves the contradiction by applying different handling strategies to different traffic types.
Data Source
AI summary
In one aspect of the teachings herein, a radio node provides a local loopback mode of operation in at least some operational instances, in which it loops “local” traffic between wireless devices operating within a local radio cell or cells, rather than forwarding such traffic along to a controlling gateway for handling. The wireless devices operating within the cell(s) and involved in the loopback operation switch over from symmetric encryption that involves the controlling gateway as a secure endpoint for their traffic, to asymmetric or public-private key pair encryption. The radio node uses a correspondingly derived loopback encryption key to enable security on the loopback traffic flow between the involved local devices. Use of the loopback encryption key means that the radio node need not know or otherwise have access to the symmetric encryption keys used by the involved devices and the controlling gateway for “normal” non-loopback operation.