MulteFire Lite UE Implementation via LTE-TDD Frame Structure
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Solution Overview
Problem
The implementation of MulteFire (MF) 1.0 technologies faces challenges such as difficulty in UE LBT functionality, interlaced UL waveform, and new UE procedures, necessitating a lighter version for timely deployment without major device changes, while adhering to regulatory requirements like ETSI 5 GHz band regulations.
Innovation Solution
The proposed solution is a MulteFire Lite (MFIR) design based on LTE-TDD frame structure, which simplifies UE implementation, minimizes regulatory compliance modifications, and allows for easier deployment in controlled environments by using a Listen Before Talk (LBT) mechanism within the 5 GHz band, ensuring compatibility with existing regulations and reducing performance degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If MulteFire 1.0 technologies are implemented, then wireless communication capability is improved, but device complexity and difficulty of implementation increase
Solution Approach 1:
The patent segments the MulteFire implementation into two versions: MF 1.0 for full functionality and MF-Lite for simplified deployment. MF-Lite divides the feature set to exclude complex components like interlaced UL waveform and advanced LBT mechanisms, allowing simpler UE implementation while maintaining core wireless communication capability in the 5 GHz band
Solution Approach 2:
The patent extracts and removes complex features from the standard MF 1.0 specification to create MF-Lite. Specifically, it takes out interlaced UL waveform support, advanced Cat-4 LBT functionality, and certain HARQ procedures, retaining only essential features needed for basic operation in controlled environments
2Adaptability or versatility
If MulteFire 1.0 technologies are implemented, then wireless communication capability is improved, but deployment time increases due to major device changes
Solution Approach 1:
The patent performs preliminary action by defining MF-Lite as a pre-simplified version with clearly specified feature exclusions. This allows device manufacturers to prepare simpler implementations in advance knowing exactly which features are required, enabling timely deployment in controlled environments without waiting for full MF 1.0 readiness
3Reliability
If LBT mechanism is used in 5 GHz band, then regulatory compliance is improved, but channel access efficiency may deteriorate
Solution Approach 1:
The patent applies local quality by implementing LBT mechanisms selectively based on geographic location and regulatory requirements. MF-Lite configures LBT behavior locally for each deployment environment, allowing compliant operation in regions requiring it while optimizing channel access efficiency where regulations permit more aggressive access strategies
Data Source
AI summary
Systems, apparatuses, methods, and computer-readable media are provided for a user equipment (UE) device that includes one or more processors configured to determine, based on a DL signal in an LTE-TDD radio frame, that an eNB has assessed, based on a Cat-2 listen before talk (LBT) procedure, that a radio frame is valid; and in response to determining that the radio frame is valid, transmitting a UL burst within a predetermined period of time after a DL burst in the radio frame.