Multi-Beam Downlink Control Signaling Across Shared Time Resources
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Solution Overview
Problem
In existing data transmission methods, the reliability of downlink control signaling is poor due to the use of single beam directions for data transmission, particularly when multiple transmission reception points or panels are involved, leading to inefficient communication.
Innovation Solution
Implementing a method where the same downlink control signaling is sent using a same time domain resource on multiple beam directions with different frequency domain resources, allowing for retransmission across multiple transmission reception points or panels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If single beam direction is used for data transmission, then device complexity is reduced, but reliability of downlink control signaling deteriorates
Solution Approach 1:
The patent segments the downlink control signaling transmission by dividing frequency domain resources into multiple parts, each associated with different beam directions. The network device configures multiple frequency domain resources for the same time domain resource, where each resource corresponds to a different beam direction, allowing the terminal to receive control signaling through multiple beams simultaneously, thereby improving reliability without requiring completely separate transmission systems
Solution Approach 2:
The patent makes the time domain resource universal by configuring it to serve multiple beam directions simultaneously. The same time domain resource is shared across multiple frequency domain resources that correspond to different beam directions, allowing a single time resource to fulfill multiple transmission functions and improving reliability without proportionally increasing time resource consumption
2Reliability
If multiple beam directions are used for data transmission, then reliability of downlink control signaling is improved, but use of energy increases
Solution Approach 1:
The patent merges multiple beam transmissions by configuring them to share the same time domain resource. Instead of transmitting control signaling on different time resources for different beams, the network device combines multiple beam transmissions in the frequency domain while reusing the time domain resource, thereby reducing overall energy consumption while maintaining improved reliability through multi-beam diversity
Solution Approach 2:
The patent changes the frequency domain parameters by configuring multiple frequency domain resources with different frequency allocations but the same time domain resource. This parameter change allows the system to transmit control signaling on multiple beams simultaneously without proportionally increasing energy consumption, as the time resource is reused across frequency divisions
Data Source
AI summary
A data transmission method is provided. The data transmission method is performed by a network device and includes: configuring a plurality of different frequency domain resources, and configuring a same time domain resource for the plurality of different frequency domain resources, where the plurality of different frequency domain resources having the same time domain resource correspond to a plurality of control resource sets (CORESETs) with different frequency domain resources, the plurality of CORESETs correspond to at least one same configuration parameter, the at least one same configuration parameter includes: a number of time domain symbols, a cycle of a search space, a slot offset of the search space, or a starting symbol position monitored in a slot of the search space; and sending a same downlink control signaling on a plurality of beam directions, using the same time domain resource with the plurality of different frequency domain resources.