Sub-Band Slot Allocation for Dynamic TDD Signal Transmission
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently transmitting and receiving signals due to resource shortages and high-speed service demands, particularly in the context of 5G networks where sub-band operations and duplexing configurations complicate signal processing.
Innovation Solution
A user equipment (UE) is provided with a communication module and processor that acquires resource allocation information for downlink and uplink transmissions, employing sub-band operations to manage signal transmission and reception efficiently, including restrictions and adjustments based on sub-band configurations, channel state information, and symbol overlaps to optimize signal handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dynamic TDD is used to vary the number of OFDM symbols according to data traffic directions, then spectral efficiency is improved, but device complexity increases due to the need to transmit and process slot configuration information
Solution Approach 1:
The frequency band is divided into multiple sub-bands, and the slot configuration information is transmitted separately for each sub-band. This segmentation allows the base station to independently control downlink and uplink OFDM symbol allocations in different sub-bands, improving spectral efficiency while managing complexity through localized control rather than global reconfiguration.
Solution Approach 2:
The patent implements dynamic TDD by allowing the number of downlink and uplink OFDM symbols to vary based on real-time data traffic directions in each sub-band. The slot configuration information is dynamically adjusted and transmitted to terminals according to actual traffic conditions, enabling flexible adaptation to changing communication demands.
2Productivity
If sub-band operations are implemented for downlink and uplink transmissions, then resource allocation efficiency is improved, but measurement precision requirements increase due to channel state information processing in sub-bands
Solution Approach 1:
The frequency spectrum is segmented into multiple sub-bands, and channel state information is measured and processed separately for each sub-band. This segmentation enables precise resource allocation within each sub-band while reducing the overall measurement complexity by localizing channel conditions to specific frequency portions rather than requiring global precision.
Solution Approach 2:
The patent applies local quality by measuring and reporting channel state information specifically for the sub-bands where downlink and uplink transmissions occur. This localized measurement approach ensures that resource allocation is optimized based on actual local channel conditions in each sub-band, improving resource allocation efficiency while reducing unnecessary measurement overhead in other frequency regions.
3Productivity
If the number of downlink and uplink OFDM symbols is varied according to traffic directions, then data transmission capacity is improved, but loss of time increases due to slot configuration information transmission and processing
Solution Approach 1:
By dividing the frequency band into sub-bands and processing slot configuration information independently for each sub-band, the system reduces the overall processing time. The base station can transmit configuration information for multiple sub-bands in parallel or sequentially without waiting for complete processing of the entire frequency spectrum, thereby reducing time loss while maintaining high data transmission capacity.
Solution Approach 2:
The base station transmits slot configuration information to terminals in advance before the actual data transmission begins. This preliminary action allows terminals to prepare their receivers and processors ahead of time, reducing the processing time required during the actual data transmission phase and enabling faster adaptation to changing traffic directions.
Data Source
AI summary
The present invention relates to a wireless communication system and, more specifically, to a method wherein resource allocation information for downlink reception or uplink transmission is acquired, and if the downlink reception or uplink transmission is required on a sub-band slot/symbol, the downlink reception or uplink transmission is performed in consideration of sub-band operations, and a wireless device therefor.