Terminal Device Reporting Maximum Duration for Joint Channel Estimation
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Solution Overview
Problem
The 5G new radio (NR) system faces challenges in uplink coverage due to greater path loss at higher frequency spectra, necessitating improved uplink channel estimation performance.
Innovation Solution
A method where a terminal device reports the maximum duration of joint channel estimation to a network side device, which uses this duration as a reference for configuring the time window for joint channel estimation and retransmission, thereby enhancing uplink channel estimation performance and coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the time window for joint channel estimation is extended to improve uplink coverage, then the coverage area is improved, but the channel estimation accuracy deteriorates due to increased time dispersion
Solution Approach 1:
The patent applies dynamics by making the time window configuration adaptive rather than fixed. The network side device dynamically adjusts the time window length based on the terminal's reported maximum duration capability and current channel conditions, allowing the system to optimize between coverage and accuracy in real-time different conditions
Solution Approach 2:
The patent changes the parameter of time window length based on the terminal's maximum duration capability. By configuring the time window length according to the reported maximum duration, the system adapts the estimation parameters to match terminal-specific characteristics, resolving the contradiction between extended coverage and maintained accuracy
2Device complexity
If a fixed time window length is used for joint channel estimation, then the system complexity is reduced, but the uplink channel estimation performance deteriorates due to inability to adapt to different terminal capabilities
Solution Approach 1:
The patent applies preliminary action by having the terminal device pre-determine and report its maximum duration capability for joint channel estimation before actual communication. This advance reporting allows the network side device to configure appropriate time window lengths without increasing real-time processing complexity, thus maintaining low system complexity while improving estimation performance
Solution Approach 2:
The patent implements feedback through the terminal's reporting of its maximum duration capability to the network side device. This feedback mechanism enables the network to adaptively configure time window lengths according to each terminal's specific capabilities, improving channel estimation performance without significantly increasing system complexity
Data Source
AI summary
A method for reporting a maximum duration of joint channel estimation includes: receiving a first message sent by a network side device, the first message being used for instructing the terminal device to report the maximum duration of the joint channel estimation; and sending the maximum duration to the network side device. The terminal device reports the maximum duration of the joint channel estimation, so as to enable the network side device to take the maximum duration as a reference value of the time window for the joint channel estimation of the terminal, and configure a length of the time window for a retransmission of the joint channel estimation for the terminal device based on the reference value.