Frequency Band Segmentation for HD-FD Coexistence
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Solution Overview
Problem
Existing wireless communication systems face challenges in enabling the coexistence of half-duplex (HD) and full-duplex (FD) terminals in the same frequency band, as HD operations are traditionally linked to specific frequency bands, preventing a mix of FD and HD terminals.
Innovation Solution
Assigning separate frequency bands for HD and FD operations, where the HD frequency band overlaps with the FD frequency band, allowing for simultaneous operation by determining the appropriate band based on user equipment type and controlling transmissions to avoid overlap in subframes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate frequency bands are assigned for HD and FD operations, then coexistence of HD and FD terminals is enabled, but frequency band resources are fragmented and overlap is required
Solution Approach 1:
The frequency band is segmented into a first frequency band for HD operations and a second frequency band for FD operations. The first frequency band is a subset of the second frequency band, allowing HD terminals to operate in the overlapping portion while FD terminals can utilize both bands. This segmentation enables coexistence by providing dedicated frequency resources for each terminal type while maintaining resource efficiency through the overlapping structure.
2Productivity
If the first frequency band for HD operations is a subset of the second frequency band for FD operations, then efficient resource utilization is achieved, but interference management becomes challenging
Solution Approach 1:
The system dynamically assigns the first frequency band (for HD operations) within the range of the second frequency band (for FD operations) based on actual terminal distribution and traffic conditions. When HD terminals are present, the overlapping portion is allocated to HD operations; when only FD terminals are active, the full second frequency band is utilized. This dynamic adjustment optimizes resource utilization while minimizing interference through adaptive frequency allocation.
Data Source
AI summary
Half-duplex (HD) operations enable low cost implementations of LTE terminals. Traditionally, HD operations may be linked to a particular frequency band which may not allow a mix of full-duplex (FD) and HD terminals in the same frequency band. Therefore, certain aspects of the present disclosure provide techniques for enabling coexistence, in a given frequency band, of HD and FD terminals, by introducing frequency bands designated for HD operation and overlapping existing frequency bands designated for FD operation.