Dynamic Carrier Frequency Switching for Sub-THz Repeater Coverage
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing different carrier frequencies for secondary cell coverage, particularly in high-frequency bands like sub-THz, which result in reduced coverage area, increased power consumption, and susceptibility to noise and interference due to Tx-to-Rx leakage in analog repeaters.
Innovation Solution
Implementing a method where repeaters and user equipment (UE) dynamically switch between different carrier frequencies within the same frequency band for receiving and transmitting operations based on location changes, improving Tx-to-Rx isolation and allowing increased transmit power and coverage area by using analog repeaters that perform frequency domain-based separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If analog repeaters are used for sub-THz communication, then transmit power and coverage area can be increased, but Tx-to-Rx leakage causes noise and interference
Solution Approach 1:
The patent divides the frequency band into separate carrier frequencies for transmit and receive operations. By segmenting the frequency spectrum, the system can simultaneously perform high-power transmit operations and sensitive receive operations without mutual interference, resolving the Tx-to-Rx leakage problem while maintaining high transmit power capability
Solution Approach 2:
The patent introduces frequency domain separation as an intermediary mechanism between transmit and receive paths. By using different carrier frequencies as a mediating layer, the system isolates the harmful Tx-to-Rx leakage from the sensitive receive signal, allowing both high power transmission and low noise reception to coexist
2Productivity
If high-frequency bands like sub-THz are used, then data rate and throughput are improved, but coverage area is reduced
Solution Approach 1:
The patent resolves the coverage-area limitation of high-frequency bands by introducing frequency diversity as an additional dimension. Instead of relying solely on spatial coverage, the system uses multiple carrier frequencies within the same frequency band to provide coverage, effectively extending the service area while maintaining high data rates through frequency aggregation
3Adaptability or versatility
If multiple carrier frequencies are used for secondary cell coverage, then coverage flexibility is improved, but device complexity increases
Solution Approach 1:
The patent implements a universal configuration mechanism where a single set of parameters can control multiple carrier frequencies for different coverage areas. The network node and UE use a standardized multi-frequency configuration approach that handles various coverage scenarios (first coverage area, second coverage area, and combined coverage) through a unified control framework, reducing configuration complexity despite supporting multiple frequencies
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, via a primary cell (PCell), first configuration information associated with a secondary cell (SCell) indicating a first carrier frequency associated with the SCell, the first carrier frequency being associated with a first coverage area of the SCell. The UE may communicate, via the SCell, a first one or more signals using the first carrier frequency. The UE may receive, via the PCell, second configuration information associated with the SCell indicating a second carrier frequency associated with the SCell based at least in part on a location of the UE changing from the first coverage area to a second coverage area of the SCell. The UE may communicate, via the SCell, a second one or more signals using the second carrier frequency. Numerous other aspects are described.