5G Downlink Data Transmission With Synchronization Signal Segmentation
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Solution Overview
Problem
In 5G wireless communication systems, there is a need for efficient resource utilization when transmitting downlink data in slots where synchronization signal blocks are transmitted, as existing methods do not effectively manage resource allocation for data and demodulation reference signals (DMRS) in the presence of synchronization signals.
Innovation Solution
The method involves determining whether a slot for downlink data transmission corresponds to a slot with a synchronization signal block and identifying a resource region for data transmission that excludes the bandwidth of the synchronization signal block, allowing for efficient transmission of downlink data and DMRS by using resource regions other than those occupied by the synchronization signal block, and optionally transmitting mini-slot configuration information to the terminal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If downlink data is transmitted in a slot where synchronization signal block is transmitted, then resource utilization is improved, but interference between data and synchronization signals occurs
Solution Approach 1:
The patent divides the time-frequency resource grid into distinct regions: synchronization signal blocks occupy specific resource blocks in certain slots, while downlink data is transmitted in other resource blocks or other slots. This segmentation allows both synchronization signals and data to coexist without interference while maintaining high resource utilization.
Solution Approach 2:
The patent applies different transmission characteristics to different parts of the resource grid. Synchronization signal blocks use specific resource blocks with particular beamforming configurations, while downlink data uses other resource blocks with different configurations. This local differentiation enables coexistence without interference.
2Measurement precision
If resource allocation is optimized for synchronization signal transmission, then synchronization accuracy is improved, but data transmission efficiency deteriorates
Solution Approach 1:
The patent segments the resource grid to allocate specific resource blocks for synchronization signals and other resource blocks for data transmission. This ensures that synchronization signals receive dedicated resources for accurate timing and frequency synchronization, while data transmission utilizes remaining resources efficiently without compromising either function.
3Measurement precision
If demodulation reference signals are transmitted in the same slot as synchronization signals, then channel estimation accuracy is improved, but resource conflict occurs
Solution Approach 1:
The patent segments frequency resources by allocating demodulation reference signals in resource blocks that are frequency-division multiplexed with synchronization signal blocks. This segmentation allows both signals to be transmitted simultaneously in the same slot without resource conflict, while maintaining accurate channel estimation for data demodulation.
Solution Approach 2:
The patent resolves resource conflicts by introducing frequency division as an additional dimension for resource allocation. Instead of time-division multiplexing only, the system uses both time and frequency dimensions to separate synchronization signals and demodulation reference signals, enabling simultaneous transmission without interference.
Data Source
AI summary
Disclosed is a communication technique for merging, with IoT technology, a 5G communication system for supporting a data transmission rate higher than that of a 4G system, and a system therefor. The present disclosure can be applied to intelligent services (for example, smart home, smart building, smart city, smart car or connected car, healthcare, digital education, retail, security, and safety-related services, and the like) on the basis of 5G communication technology and IoT-related technology. The purpose of the present invention is to efficiently transmit downlink data in a slot in which a synchronization signal block is transmitted and, according to the present invention, a base station in a communication system checks whether a synchronization signal block and downlink data are transmitted in the same slot, determines a downlink data transmission method when the synchronization signal block and the downlink data are transmitted in the same slot, and transmits the downlink data and a demodulation reference signal for the downlink data to a terminal on the basis of the downlink data transmission method, and the downlink data transmission method can be determined on the basis of at least one of the transmission pattern of the synchronization signal block, the relationship between the synchronization signal block and a subcarrier interval applied to the downlink data, and the index of the slot in which the synchronization signal block is to be transmitted.