NTN Uplink Capability Reporting for DMRS Bundling Coverage
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Solution Overview
Problem
In non-terrestrial network (NTN) systems, the long distance between satellites and terrestrial terminals leads to significant path loss, limiting the coverage of uplink channels due to challenges in maintaining phase continuity and power consistency for joint channel estimation.
Innovation Solution
Terminals report capability information indicating their ability to maintain power consistency and phase continuity for joint channel estimation, enabling DMRS bundling to improve uplink channel coverage by reporting this capability through various methods such as periodic reporting, condition-based triggering, or upon random access completion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If joint channel estimation is performed for uplink channels in NTN systems, then channel estimation accuracy is improved, but phase continuity and power consistency cannot be maintained due to long transmission distance
Solution Approach 1:
The patent segments the channel estimation process by introducing separate indication information for phase continuity capability and power consistency capability. This allows the terminal to independently indicate its ability to maintain phase continuity and power consistency, enabling the network to configure appropriate estimation strategies for each aspect rather than treating them as a unified constraint.
Solution Approach 2:
The patent implements dynamic capability indication where the terminal can flexibly report its phase continuity and power consistency capabilities through uplink signaling. The network device then dynamically configures channel estimation parameters based on the reported capabilities, allowing the system to adapt to varying transmission conditions and terminal capabilities in NTN environments.
2Manufacturing precision
If capability reporting mechanisms are implemented, then network configuration accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent merges the phase continuity capability indication and power consistency capability indication into a unified capability reporting framework. Both types of capability information are transmitted through the same uplink signaling resources, allowing the network to obtain comprehensive terminal capabilities while efficiently utilizing signaling resources rather than requiring separate dedicated signaling for each capability type.
Solution Approach 2:
The capability indication mechanism is designed to serve multiple functions: it provides phase continuity capability information, power consistency capability information, and enables the network to derive configuration parameters for channel estimation. This multi-functional approach reduces the need for separate signaling mechanisms and maximizes the utility of the reported capability information.
Data Source
AI summary
A method for reporting capability information is performed by a terminal, and includes: reporting the capability information, the capability information indicating a capability of demodulation reference signal (DMRS) bundling for an uplink channel in a non-terrestrial network (NTN).