Full Duplex Subband Configuration in TDD Carriers
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Solution Overview
Problem
Current wireless communication systems using time division duplexing (TDD) component carriers face latency issues due to time division duplexing of downlink and uplink resources, which limits transmit power and increases communication delays, affecting reliability and throughput.
Innovation Solution
Implementing frequency division duplexing within TDD component carriers by configuring subbands for both uplink and downlink communications, allowing for simultaneous use of multiple frequency division duplexed subbands to reduce latency and increase transmit power and throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If time division duplexing is used for downlink and uplink resources, then frequency resources are efficiently utilized, but latency increases and transmit power is limited
Solution Approach 1:
The patent divides the frequency band into multiple subbands and assigns specific subbands for uplink and downlink communications simultaneously. This segmentation of frequency resources enables full duplex operation, allowing the system to overcome the latency and throughput limitations of time division duplexing by transmitting and receiving data concurrently on different frequency subbands.
Solution Approach 2:
The patent transitions from time-division multiplexing to frequency-division multiplexing by utilizing the frequency dimension. Instead of separating uplink and downlink in time, the system separates them in frequency by configuring specific subbands for each direction, enabling simultaneous transmission and reception thereby reducing latency and increasing throughput.
2Power
If time division duplexing is used, then frequency resources are efficiently utilized, but transmit power is limited
Solution Approach 1:
The patent segments the frequency spectrum into multiple subbands and allocates specific subbands for uplink and downlink transmissions. This frequency segmentation allows the system to increase transmit power by utilizing multiple frequency subbands simultaneously for full duplex communication, thereby improving throughput without the power limitations inherent in time division duplexing.
Solution Approach 2:
The patent merges uplink and downlink communications into the same time slot by using different frequency subbands. This combining of transmit and receive operations in the frequency domain enables the system to achieve higher transmit power and improved throughput compared to time division duplexing, where uplink and downlink are separated in time.
3Productivity
If frequency division duplexing is implemented within TDD component carriers, then latency is reduced and throughput is improved, but system complexity increases
Solution Approach 1:
The patent segments the frequency band into multiple subbands and configures specific subbands for uplink and downlink communications. This segmentation approach enables full duplex operation with reduced latency and improved throughput, while the complexity is managed through systematic subband configuration and resource allocation mechanisms.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a system information block (SIB) indicating a plurality of subband configurations. The UE may identify, based at least in part on one or more of the plurality of subband configurations, one or more uplink subbands in a time division duplexing (TDD) component carrier and one or more downlink subbands in the TDD component carrier. The one or more uplink subbands and the one or more downlink subbands may be frequency division duplexed within the TDD component carrier. Numerous other aspects are provided.