Pilot Signal Timing Mapping for Directional Beam Alignment
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Solution Overview
Problem
In wireless communication systems where the terminal device and base station are unaware of their relative direction, transmitting and receiving pilot signals in a beam sweeping manner leads to low resource utilization, increased power consumption, and prolonged receiving delays.
Innovation Solution
Determine a resource for transmitting/receiving pilot signals based on a correspondence between beam sweeping directions and time domain locations using first information, allowing the terminal device and base station to align transmissions and receptions without beam sweeping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pilot signal is transmitted/received in beam sweeping manner, then relative direction can be discovered, but resource utilization is low
Solution Approach 1:
The base station configures the terminal device with predetermined correspondence relationships between beam sweeping directions and time domain locations before the actual communication. This preliminary configuration allows the terminal device to directly use the correct time domain location for pilot signal transmission without needing to perform beam sweeping to discover the relative direction, thereby improving resource utilization while maintaining direction discovery capability.
2Reliability
If pilot signal is transmitted/received in beam sweeping manner, then relative direction can be discovered, but receiving delay is prolonged
Solution Approach 1:
The correspondence relationship between beam sweeping directions and time domain locations is established in advance through configuration. This allows the terminal device to immediately know which time domain location corresponds to which beam direction, eliminating the need for time-consuming beam sweeping during actual communication and significantly reducing receiving delay.
Solution Approach 2:
Instead of having the terminal device perform beam sweeping to discover directions through trial and error, the system uses a pre-configured copy of the correspondence relationship that maps beam directions to time domain locations. This copied information allows direct transmission without iterative discovery, reducing time loss.
3Reliability
If pilot signal is transmitted/received in beam sweeping manner, then relative direction can be discovered, but device power consumption increases
Solution Approach 1:
The configuration of correspondence relationships between beam sweeping directions and time domain locations is performed in advance. This preliminary setup eliminates the need for the terminal device to perform power-intensive beam sweeping operations during actual communication, significantly reducing device power consumption while maintaining the ability to discover relative direction.
Solution Approach 2:
The terminal device uses the pre-configured correspondence relationship to autonomously determine the correct time domain location for pilot signal transmission without needing to perform beam sweeping. This self-service approach leverages the pre-established mapping to avoid redundant energy-consuming operations.
Data Source
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AI summary
Disclosed are a wireless communication method and a communications apparatus. The wireless communication method includes: transmitting/receiving, by a terminal device, a first pilot signal, where a resource for transmitting/receiving the first pilot signal is determined based on first information, and the first information is used to indicate a correspondence between one or more beam sweeping directions and one or more time domain locations.