Base Station Frame Structure Configuration for 5G Unlicensed Band Coexistence
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Solution Overview
Problem
The 5G communication system faces challenges in achieving high frequency efficiency when using unlicensed bands due to interference with other radio access systems, especially when multiple frame formats are multiplexed, leading to deterioration in frequency utilization efficiency.
Innovation Solution
A base station and terminal apparatus configuration that includes configuring multiple frame structures in a second frequency band different from the first, with non-transmit periods and frame boundaries tailored for each frame structure, and scheduling information for uplink signals to manage radio resources effectively, reducing interference and enhancing coexistence with other radio access systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple frame formats are multiplexed in the 5G system to satisfy various required conditions, then the system can support diverse service scenarios (EMBB, eMTC, URLLC), but it causes unnecessary interference on other radio access systems and deteriorates frequency utilization efficiency
Solution Approach 1:
The patent applies periodic action by configuring multiple frame structures with different periodicities and cycle lengths in the unlicensed band. Each frame structure corresponds to different service scenarios (EMBB, eMTC, URLLC) and has its own transmission period. This allows the system to support diverse services while controlling interference through periodic transmission patterns that can be coordinated with other radio access systems.
Solution Approach 2:
The patent segments the unlicensed band resources by configuring multiple independent frame structures with different parameters (cycle lengths, symbol lengths, occupied bandwidths) for different service scenarios. Each frame structure operates semi-independently with its own time-frequency resources, allowing simultaneous support of multiple services while managing interference through resource segmentation.
2Adaptability or versatility
If different frame formats with different symbol lengths and occupied bandwidths are used, then various service requirements can be met, but frequency utilization efficiency of the unlicensed band deteriorates
Solution Approach 1:
The patent applies local quality by assigning different frame structure parameters (symbol lengths, occupied bandwidths, cycle lengths) to different time-frequency resources based on service requirements. Each service scenario (EMBB, eMTC, URLLC) receives optimized frame structure parameters locally suited to its needs, while the overall system maintains high frequency utilization through coordinated resource allocation.
Solution Approach 2:
The patent implements dynamics by allowing the base station to flexibly configure and switch between multiple frame structures with different parameters. The frame structures can be dynamically activated or deactivated based on traffic conditions and service requirements, enabling the system to adapt to changing demands while maintaining efficient frequency utilization.
Data Source
AI summary
To provide a base station apparatus, a terminal apparatus, and a communication method for achieving a high frequency efficiency while coexisting with other radio access systems in an environment where multiple frame formats are multiplexed for use. A base station apparatus according to the present invention includes a transmitter configured to configure at least one frame structure of multiple frame structures in the second frequency band, notify the terminal apparatus of control information relating to the frame structure, and configure a non-transmit period with prescribed length between multiple signal transmit periods of the frame structure.