Variable Subcarrier Spacing for Reference and Data Signals
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Solution Overview
Problem
Existing network communication protocols use a uniform parameter set for data transmission, which limits the transmission of different types of data, resulting in poor communication performance due to inflexible subcarrier spacing configurations.
Innovation Solution
The method involves varying subcarrier spacings for data and control signals while maintaining a consistent spacing for reference signals, allowing for flexible resource allocation and reduced channel estimation delay, thereby improving communication performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a uniform parameter set is adopted for data transmission, then the communication protocol is simple and easy to implement, but the transmission of different types of data is limited and communication performance is poor
Solution Approach 1:
The patent segments the parameter set into multiple configurations (first parameter set and second parameter set) with different subcarrier spacings. The network device can select different parameter sets for different data types or transmission scenarios, allowing flexible adaptation without requiring complete redesign of the communication protocol.
Solution Approach 2:
The patent introduces dynamic parameter selection where the network device can switch between different parameter sets based on transmission requirements. The terminal device receives indication information to determine which parameter set to use, enabling adaptive adjustment of subcarrier spacing for different data types while maintaining protocol simplicity.
2Reliability
If a specific parameter set is used for data transmission, then the protocol implementation is simplified, but communication performance deteriorates due to inability to optimize for different data types
Solution Approach 1:
The patent applies different parameter sets to different local contexts or data types. Each parameter set is optimized for specific transmission scenarios, allowing the system to achieve high communication performance for each data type while keeping the overall system manageable through structured parameter set definitions.
Solution Approach 2:
The patent changes key parameters (subcarrier spacing) by defining multiple parameter sets with different configurations. The network device indicates which parameter set to use through signaling, allowing the system to optimize communication performance for different data types by selecting appropriate parameter configurations without increasing fundamental protocol complexity.
3Loss of time
If uniform subcarrier spacing is used for all signals, then device complexity is reduced, but channel estimation delay increases
Solution Approach 1:
The patent performs preliminary configuration of multiple parameter sets with different subcarrier spacings. The terminal device receives and stores these parameter sets in advance, along with indication information that specifies which set to use. This preliminary preparation enables quick switching to appropriate parameter sets, reducing channel estimation delay without requiring complex real-time processing.
Data Source
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AI summary
Embodiments of the present application provide an information transmission method and device, capable of transmitting reference signals and data by using different sub-carrier intervals, so as to support data having different sub-carrier intervals to use reference signals having the same sub-carrier intervals, thereby inhibiting the interference between reference signals, reducing the channel estimation complexity, and improving the communication performance. The method comprises: a first transmitting end transmits, on a first symbol in a first time-frequency region, a first signal by using a first sub-carrier interval, the first signal being a reference signal; the first transmitting end transmits, on a second symbol in the first time-frequency region, a second signal by using a second sub-carrier interval, the second signal being a data signal or control signal, wherein the first sub-carrier interval is different from the second sub-carrier interval, and the size of the first time-frequency region is the size of the minimum time-frequency scheduling unit of the data signal.