Multi-Panel Uplink Timing for TRP-Specific Random Access
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing communication systems struggle to effectively manage uplink communication with terminals having multiple panels, particularly in scenarios requiring different downlink timings and timing advances, which can lead to suboptimal performance.
Innovation Solution
A method and apparatus for a terminal with multiple panels that involves receiving synchronization signals from multiple transmission and reception points (TRPs), determining distinct downlink timings, and transmitting random access preambles based on these timings, along with managing different timing advances to improve communication performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a terminal uses a single downlink timing for communication with multiple TRPs, then the device complexity is reduced, but the communication performance deteriorates due to inability to manage different timing advances for multiple panels
Solution Approach 1:
The patent segments the timing management by introducing separate downlink timing parameters (first DL timing and second DL timing) for different TRPs/panels. This allows each panel to have its own timing advance management, resolving the contradiction by dividing the unified timing system into multiple independent timing systems that can be optimized for each panel's specific requirements
2Reliability
If a terminal manages multiple downlink timings for different TRPs, then the communication performance is improved, but the device complexity increases due to additional timing management requirements
Solution Approach 1:
The patent applies local quality by configuring different downlink timing parameters (first DL timing from first SSB, second DL timing from second SSB) specifically for different TRPs/panels. Each panel receives customized timing configuration tailored to its specific downlink characteristics, allowing optimized communication performance for each local panel-TRP link while maintaining overall system coordination
3Ease of operation
If the terminal transmits random access preamble based on first DL timing to first TRP, then the timing synchronization is simplified, but the adaptability deteriorates when second TRP requires different timing
Solution Approach 1:
The patent introduces dynamic adaptability by enabling the terminal to select different downlink timing parameters based on the target TRP. When performing random access to a specific TRP, the terminal dynamically switches between first DL timing and second DL timing configurations, allowing the system to adapt to different TRP requirements while maintaining simple timing procedures for each individual TRP interaction
Data Source
Figure 1
Figure 2~3
Figure 4~6
AI summary
A method and a device for uplink communication in a communication system supporting multiple panels are disclosed. A method of a terminal comprises the steps of: receiving a first SSB from a first TRP; determining a first DL timing on the basis of the first SSB; receiving a second SSB from a second TRP; determining a second DL timing on the basis of the second SSB; receiving a PDCCH order from the first TRP; and when a first information element included in the PDCCH order indicates the second SSB or the second TRP, transmitting an RA preamble to the second TRP on the basis of the second DL timing.