Reference Signal Port Grouping for Lower Wireless Overhead
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Solution Overview
Problem
The increasing size of antennas in wireless communication systems leads to high overheads of reference signals, particularly when a large number of transmit ports are used, which affects transmit power, signal-to-noise ratio, and channel estimation accuracy.
Innovation Solution
The method involves configuring reference signals to be sent through selected transmit port groups using orthogonal code sequences (OCS) to reduce overheads, improve transmit power and SNR, and enhance channel estimation accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If reference signals are sent through all transmit ports using all orthogonal code sequences, then channel estimation coverage is complete, but indication overheads increase greatly
Solution Approach 1:
The patent segments the complete set of transmit ports into multiple transmit port groups, where each group is associated with a specific orthogonal code sequence. Instead of configuring all transmit ports with all code sequences, the system selectively configures only certain transmit port groups with specific OCS configurations. This segmentation reduces the indication overhead while maintaining sufficient channel estimation coverage through the selected groups.
2Adaptability or versatility
If the quantity of transmit ports increases, then antenna size and communication capability improve, but reference signal overheads increase greatly
Solution Approach 1:
The patent applies partial action by configuring reference signals for only a subset of transmit port groups rather than all transmit ports. The configuration information indicates specific transmit port groups and their associated orthogonal code sequences, leaving other transmit ports unconfigured. This partial configuration reduces reference signal overheads while maintaining adequate channel estimation capability for the configured ports.
3Measurement precision
If reference signals are configured for all transmit ports, then channel estimation accuracy is maintained, but transmit power is reduced due to overhead distribution
Solution Approach 1:
By segmenting transmit ports into groups and selectively configuring only certain groups with orthogonal code sequences, the patent concentrates the available transmit power into fewer, more significant reference signal transmissions. This segmentation approach ensures that the configured transmit port groups receive adequate power for accurate channel estimation, while unconfigured groups do not consume reference signal resources.
Data Source
AI summary
Embodiments of this application provide a communication method and a related apparatus. The method includes: receiving configuration information; and sending a reference signal based on the configuration information. The configuration information indicates to send the reference signal through a first transmit port group using a first orthogonal code sequence, the configuration information includes a configuration of the first transmit port group and/or a configuration of the first orthogonal code sequence, a quantity of first transmit port groups is less than or equal to a total quantity X of transmit port groups of a terminal device, a quantity of first orthogonal code sequences is less than or equal to a total quantity NG of transmit ports in the first transmit port group.