5G Reservation Resource Signaling for Low-Overhead Channel Estimation
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Solution Overview
Problem
The existing 5G wireless communication systems face challenges in efficiently performing channel estimation and minimizing reference signal overhead in high and low frequency bands, particularly above 6 GHz, due to varying channel characteristics and demands for low latency and high mobility.
Innovation Solution
The implementation of a time-contiguous reference signal (TCRS) to enhance channel estimation performance and minimize reference signal overhead by configuring it in a manner that considers both high and low frequency bands, allowing for efficient channel tracking and phase noise compensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If reference signals are transmitted frequently to improve channel estimation accuracy, then channel estimation performance is improved, but reference signal overhead increases
Solution Approach 1:
The patent applies preliminary action by configuring time-contiguous reference signals in advance at specific time intervals before data transmission. The reference signals are pre-positioned in the time domain to enable channel estimation before actual data reception, allowing the receiver to prepare channel compensation parameters proactively rather than reactively.
Solution Approach 2:
The patent implements periodic action by transmitting reference signals at regular time intervals (e.g., every 2.5ms or at specific subframe periods). This periodic transmission maintains channel estimation accuracy over time while controlling the total number of reference signals through optimized interval selection, balancing measurement precision with overhead reduction.
2Adaptability or versatility
If reference signals are transmitted across all frequency bands to support both high and low frequency operations, then compatibility and performance across bands are improved, but signal overhead and complexity increase
Solution Approach 1:
The patent applies local quality by configuring reference signals differently for high and low frequency bands based on their specific channel characteristics. For high frequency bands (e.g., mmWave), reference signals are configured with parameters optimized for high mobility and phase noise, while low frequency bands use configurations suited for their more stable channel conditions. This localized optimization achieves band-specific performance without requiring identical complex configurations across all bands.
Solution Approach 2:
The patent implements universality by designing a unified time-contiguous reference signal framework that can operate across multiple frequency bands with different configurations. The same basic reference signal structure and transmission mechanism serve both high and low frequency operations, allowing the system to maintain compatibility and simplified implementation while adapting parameters for different bands through a single versatile mechanism.
3Speed
If directional beam-based transmission is used to compensate for high frequency propagation loss, then transmission distance and data rate are improved, but system complexity and resource management difficulty increase
Solution Approach 1:
The patent applies preliminary action by performing beam management and channel estimation using time-contiguous reference signals before actual data transmission in directional beam-based systems. The reference signals enable the receiver to pre-determine optimal beam directions and channel conditions, allowing the transmitter to configure directional beams in advance based on predicted channel states, thereby reducing the complexity of real-time beam management during high-speed data transmission.
Data Source
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AI summary
Disclosed are a communication method for merging, with an 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 an intelligent service (for example, smart home, smart building, smart city, smart car or connected car, healthcare, digital education, retail business, security and safety-related services, and the like) on the basis of a 5G communication technology and an loT-related technology. Disclosed are a method and an apparatus for supporting a reservation resource, and according to the present invention, a method for a base station in a communication system comprises a step of transmitting reservation resource-related information to a terminal, determining, on the basis of the reservation-related information, whether a first signal is mapped to the reservation resource and a resource, in which the first signal to be transmitted to the terminal is overlapped, and transmitting the first signal to the terminal on the basis of the determination.