Dynamic Time-Domain Frame Allocation for Shared Spectrum Coexistence
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Solution Overview
Problem
Current mobile communication technologies face challenges in efficiently utilizing unlicensed spectrum for 5G communications, particularly in coordinating networks sharing the same channel, ensuring quality of service, and complying with region-specific regulations, while also accommodating the growing demand for wireless data usage.
Innovation Solution
The method involves dynamically allocating resources in time domain multiplexing between networks within a shared spectrum channel, using a network element to determine co-existence frame sizes and allocate airtime shares based on quality of service requirements, allowing for flexible and efficient use of unlicensed spectrum, including coexistence with existing WLAN systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple networks share the same unlicensed spectrum channel, then spectrum utilization efficiency is improved, but network coordination complexity and interference management difficulty increase
Solution Approach 1:
The patent segments the shared unlicensed spectrum channel into distinct time-domain coexistence frames, where each frame is further divided into network-specific portions allocated to different networks. This temporal segmentation allows multiple networks to share the channel without simultaneous interference, resolving the contradiction by maintaining high spectrum utilization while reducing coordination complexity through structured time division.
Solution Approach 2:
The patent implements dynamic optimization of coexistence frame parameters including frame size, portion allocation ratios, and resource distribution. The network element continuously adjusts these parameters based on real-time QoS requirements, traffic conditions, and network performance metrics, enabling adaptive spectrum sharing that maintains efficiency while managing coordination complexity through flexible, condition-based reconfiguration.
2Reliability
If airtime is dynamically allocated based on QoS requirements, then service quality is improved, but airtime allocation complexity and signaling overhead increase
Solution Approach 1:
The patent establishes preliminary QoS parameters and airtime share allocations for each network before the coexistence frame begins. The network element pre-configures the division of each coexistence frame into network portions based on anticipated QoS requirements, allowing networks to transmit without real-time negotiation. This preliminary configuration ensures QoS compliance while reducing allocation complexity during actual transmission.
Solution Approach 2:
The patent incorporates feedback mechanisms where the network element monitors actual QoS performance, packet delay budgets, and transmission queue status. Based on this feedback, the system dynamically adjusts airtime allocations and coexistence frame parameters in subsequent frames, ensuring QoS requirements are met while optimizing allocation complexity through data-driven adjustments rather than theoretical calculations.
3Measurement precision
If coexistence frame size is optimized for periodic reference and measurement signals, then measurement accuracy is improved, but flexibility in resource allocation is reduced
Solution Approach 1:
The patent optimizes coexistence frame parameters including frame size, duration, and internal structure specifically for periodic reference and measurement signals. By configuring frame parameters to align with measurement signal periodicity and timing requirements, the system ensures accurate channel state information and reference signal reception. Simultaneously, the dynamic optimization capability allows these parameters to be adjusted when QoS requirements or traffic patterns change, maintaining measurement accuracy while preserving allocation flexibility.
Data Source
AI summary
A method at a network element, and a system, for resource allocation in a shared spectrum band. The method is implemented to enable time domain multiplexing between networks in a shared spectrum channel. The method includes determining a co-existence frame size for each of a plurality of successive co-existence frames that are included within a coordination period, and dynamically allocating resources of each co-existence frame for a first network.