NR Terminal Data Mapping on Reference Signal OFDM Symbols
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Solution Overview
Problem
In new radio (NR) communications systems, the alignment of transmit and receive beams is crucial for effective communication, but existing methods face challenges in reliably receiving data due to limitations in beam management, particularly when data is mapped onto the same orthogonal frequency division multiplexing (OFDM) symbol as the reference signal, leading to potential reception issues.
Innovation Solution
A communication method and apparatus that utilize reference signal configuration information to determine whether data can be mapped onto another resource element on the same OFDM symbol as the reference signal, considering beam sweeping types and beam indications, ensuring reliable data reception by aligning beam management processes through proper configuration and prioritization of beam indications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data is mapped onto the same OFDM symbol as the reference signal, then time-frequency resource utilization is improved, but data reception reliability deteriorates due to beam direction mismatch
Solution Approach 1:
The patent changes the parameter of beam sweeping type (transmit beam sweeping, receive beam sweeping, or no sweeping) and reference signal beam indication to determine data mapping configuration. By adjusting these parameters, the system can dynamically decide whether data and reference signal share the same OFDM symbol, thus resolving the contradiction between resource utilization and reception reliability
Solution Approach 2:
The patent introduces dynamic beam management where beams of transmit end and receive end can change during communication. The system dynamically aligns beams by sending reference signals and performing measurement and feedback, allowing the beam configuration to adapt to changing communication conditions while maintaining reliable data reception
2Measurement precision
If beam sweeping is performed for reference signal transmission, then beam alignment capability is improved, but the capability limitation of receive end causes reception issues when data is mapped to the same symbol
Solution Approach 1:
The patent performs preliminary beam alignment by sending reference signals and performing measurement and feedback before data transmission. This preliminary action ensures that beams are properly aligned, and based on the beam sweeping type and reference signal beam indication, the system determines whether data can be mapped to the same OFDM symbol, preventing reception issues before they occur
Solution Approach 2:
The patent uses parameter changes in beam sweeping type and reference signal beam indication to control the mapping relationship between data and reference signal. When beam sweeping is performed, the system can configure different mapping scenarios based on these parameters, ensuring that data reception reliability is maintained while still allowing flexible resource utilization
Data Source
AI summary
This application discloses a communication method and a communications apparatus. The method includes: receiving, by a terminal device, reference signal configuration information sent by a network device, where the reference signal configuration information includes at least one of the following information: a beam sweeping type and a reference signal beam indication; receiving, by the terminal device, a reference signal and data that are sent by the network device; and determining, by the terminal device based on the reference signal configuration information, whether data can be mapped onto another resource element that is located on a same orthogonal frequency division multiplexing (OFDM) symbol as the reference signal. The corresponding apparatus is further disclosed. According to technical solutions provided in this application, reliable data reception can be implemented.