Terminal Device Reference Signal Configuration for Reliable Data Reception
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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 indication of beam priorities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data is mapped onto the same OFDM symbol as the reference signal to improve time-frequency resource utilization, then resource utilization improves, but data reception reliability deteriorates due to beam direction mismatch
Solution Approach 1:
The patent applies preliminary action by having the terminal device determine in advance whether data can be mapped onto resource elements on the same OFDM symbol as the reference signal, based on reference signal configuration information received beforehand. This allows the terminal to prepare appropriate reception beams before the actual data reception, ensuring reliable reception even when data and reference signals share the same symbol.
Solution Approach 2:
The patent applies dynamics by enabling flexible data mapping decisions based on beam sweeping types and beam indications. The system dynamically adjusts whether data can be mapped onto the same OFDM symbol as the reference signal, depending on the specific beam configuration and sweeping type, rather than using a fixed mapping rule.
2Measurement precision
If beam sweeping is performed for reference signal transmission to achieve beam alignment, then beam alignment accuracy improves, but the complexity of beam management increases
Solution Approach 1:
The patent applies feedback by using beam indications that provide information about the beam directions used for reference signal transmission. The terminal device uses this feedback information to determine whether data can be mapped onto the same OFDM symbol as the reference signal, enabling accurate beam alignment without excessive complexity.
Solution Approach 2:
The patent applies parameter changes by introducing beam sweeping types as a configurable parameter that can take different values (e.g., first type, second type). These parameter changes allow the system to adapt the beam management complexity and data mapping rules according to the specific beam alignment requirements.
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.