OFDM Access Subsystem Hardware-Trust Integration via CPRI Scheduling

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Solution Overview

Problem

Existing OFDM access systems do not effectively integrate hardware-trusted systems into their standard systems and fail to efficiently share CPRI systems between hardware-trusted and standard subsystems, limiting the integration and communication of secure and non-secure data communications.

Innovation Solution

An OFDM data communication system with a trusted subsystem that encodes trust challenge data using physically-embedded keys for remote hardware validation, allocates OFDM resource blocks, and schedules user data to share a Common Public Radio Interface (CPRI) system with the access subsystem, enabling secure and efficient data exchange between hardware-trusted and standard subsystems.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If hardware-trusted subsystems are integrated into standard OFDM systems, then security and reliability are improved, but system complexity increases

Engineering Contradiction:

Improvehardware trust validationVSAvoidsystem integration complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent merges the hardware-trusted subsystem and standard OFDM subsystem into a single integrated system that shares common resources including the CPRI interface, OFDM resource blocks, and scheduling mechanisms. This integration allows secure and non-secure data to coexist while reducing overall system complexity compared to separate independent systems.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The system implements universal resource allocation where OFDM resource blocks and CPRI interfaces serve both hardware-trusted and standard subsystems. The scheduling mechanism universally manages data from both subsystems, allowing the same physical resources to perform multiple functions for different types of traffic.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Productivity

If CPRI systems are shared between hardware-trusted and standard subsystems, then resource utilization efficiency is improved, but data security and isolation are compromised

Engineering Contradiction:

ImproveCPRI resource utilizationVSAvoiddata security isolation

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent segments data traffic into distinct categories: trusted data from the hardware-trusted subsystem and non-trusted data from the standard subsystem. The scheduling mechanism applies different security policies to segmented data streams, ensuring that even though they share the same CPRI interface, their security boundaries are maintained through virtual separation.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The scheduling mechanism acts as an intermediary between the hardware-trusted and standard subsystems sharing the CPRI interface. It mediates resource allocation and data transmission, ensuring that secure data from the trusted subsystem is properly isolated while allowing efficient shared use of the physical CPRI resources through controlled access.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If OFDM resource blocks are allocated to trusted subsystem, then secure data transmission capacity is improved, but available resources for standard subsystem are reduced

Engineering Contradiction:

Improvesecure data transmissionVSAvoidstandard subsystem data capacity

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent implements dynamic resource allocation where OFDM resource blocks are flexibly assigned to hardware-trusted and standard subsystems based on real-time security requirements and traffic demands. The scheduling mechanism dynamically adjusts the allocation, allowing secure data to receive guaranteed resources when needed while standard data can utilize remaining capacity, optimizing both security and overall system productivity.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentEP3342200B1Hardware-trusted orthogonal frequency division multiplex (OFDM) access to a shared common public radio interface (CPRI)

Publication Date: 2019.10.09 SPRINT COMMUNICATIONS CO LP

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AI summary

An Orthogonal Frequency Division Multiplex (OFDM) data communication system (100) has an access subsystem (110) that exchanges user data with an access network (130). The OFDM system (100) has a trusted subsystem (120) that exchanges user data with a trusted network (140). The trusted subsystem (120) also encodes trust challenge data with a physically-embedded key and transfers the encoded trust challenge data for remote hardware trust validation. The access subsystem (110) allocates OFDM resource blocks to the trusted subsystem (120) and schedules its user data in the remaining OFDM resource blocks. The trusted subsystem (120) schedules its user data in the allocated OFDM resource blocks and determines a Common Public Radio Interface (CPRI) sequence for the user data based on the OFDM scheduling. The access subsystem (110) exchanges its user data with the trusted subsystem (120). The trusted subsystem (120) exchanges the user data with a CPRI communication system based on the CPRI sequence.