NTN Preamble Transmission Configuration for Connection Reliability
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Solution Overview
Problem
Current mobile communication networks face challenges in efficiently managing and optimizing communication protocols across diverse wireless devices and base stations, particularly in supporting multiple technologies and releases, which leads to suboptimal performance and resource utilization.
Innovation Solution
The implementation of a flexible and configurable architecture that selectively applies New Radio (NR) protocols and bandwidth parts based on criteria such as wireless device capabilities, traffic load, and system configurations, allowing for dynamic adjustment of communication parameters to optimize data flow and resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single preamble transmission is used in NTN, then device complexity is reduced, but connection reliability deteriorates due to high path loss and blocking in non-terrestrial networks
Solution Approach 1:
The patent implements dynamic preamble transmission by allowing the UE to transmit multiple preambles (e.g., 2-4 repetitions) based on network conditions and path loss characteristics of NTN. The number of preamble transmissions is configurable and can be adjusted dynamically to balance reliability requirements against device complexity and resource consumption.
Solution Approach 2:
The patent applies preliminary action by performing multiple preamble transmissions before establishing a reliable connection. Instead of attempting a single connection attempt and failing, the system proactively sends multiple preambles in advance to overcome the high path loss and potential blocking in NTN, ensuring connection establishment despite adverse conditions.
2Reliability
If multiple preamble transmissions are implemented in NTN, then connection reliability is improved, but uplink resource consumption increases
Solution Approach 1:
The patent changes key parameters including the number of preamble transmissions (configurable between 1-4), preamble format types (Format A, B, C), and time-frequency resource allocation. These parameter adjustments allow the system to optimize the balance between connection reliability and uplink resource consumption based on specific NTN conditions such as path loss, Doppler shift, and network load.
Solution Approach 2:
The patent applies partial action by implementing a configurable number of preamble repetitions rather than always using maximum transmissions. The network can select the appropriate number of repetitions (e.g., 2, 3, or 4) based on the specific NTN scenario, avoiding excessive resource consumption while achieving sufficient connection reliability for the given channel conditions.
3Reliability
If multiple preamble transmissions are used in NTN, then connection reliability is improved, but access latency increases
Solution Approach 1:
The patent implements periodic action by spacing multiple preamble transmissions across different time instances with specific periodicity. The preambles are transmitted in a structured repeating pattern (e.g., every slot or every few slots) to ensure reliable detection while managing access latency. This periodic transmission approach balances the need for multiple attempts against the time cost of each attempt.
Data Source
AI summary
A wireless device receives first configuration parameters that include a parameter for enabling multiple preamble transmissions. In response to the configuration parameters comprising the parameter for enabling multiple preamble transmissions, the wireless device transmits, for a random-access procedure, a plurality of preambles for the random-access procedure.