Prioritized Uplink Transmission for Satellite Cell-Edge Connectivity
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Solution Overview
Problem
In non-terrestrial wireless communication networks, particularly those using low-earth orbit satellites, discontinuous coverage due to rapid satellite movement poses challenges for user equipment (UE) to maintain connectivity and efficiently transmit data, leading to potential loss of critical information and increased power consumption.
Innovation Solution
The implementation of a prioritized transmission method for user equipment (UE) near the cell-edge condition, where the UE is configured with a dedicated priority indicator and triggering criteria to initiate last-minute uplink data transmission before leaving satellite coverage, utilizing configured grant physical uplink shared channel resources and satellite assistance information to manage power efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional transmission methods are used in non-terrestrial networks, then network coverage can be provided, but critical data may be lost and power consumption increases due to discontinuous coverage
Solution Approach 1:
The system performs preliminary actions by detecting cell-edge conditions and predicting satellite coverage loss before it occurs. When the UE detects it is approaching the cell edge, it proactively initiates prioritized transmission of critical data using pre-configured resources, ensuring data is sent before coverage is lost entirely. This prevents data loss by acting in advance of the coverage discontinuity.
Solution Approach 2:
The system implements feedback mechanisms where the UE continuously monitors its position relative to satellite coverage and reports cell-edge conditions to the network. Based on this feedback, the network can adjust resource allocation and transmission parameters dynamically. The UE also receives feedback about configured grant resources and uses this information to make informed decisions about when to initiate prioritized transmission.
2Reliability
If conventional transmission methods are used in non-terrestrial networks, then network coverage can be provided, but power consumption increases due to discontinuous coverage
Solution Approach 1:
The system performs preliminary actions by detecting cell-edge conditions and predicting satellite coverage loss before it occurs. When the UE detects it is approaching the cell edge, it proactively initiates prioritized transmission of critical data using pre-configured resources, ensuring data is sent before coverage is lost entirely. This prevents data loss by acting in advance of the coverage discontinuity.
Solution Approach 2:
The system implements feedback mechanisms where the UE continuously monitors its position relative to satellite coverage and reports cell-edge conditions to the network. Based on this feedback, the network can adjust resource allocation and transmission parameters dynamically. The UE also receives feedback about configured grant resources and uses this information to make informed decisions about when to initiate prioritized transmission.
3Reliability
If prioritized transmission resources are allocated to all UEs, then data transmission reliability improves, but network resource efficiency deteriorates
Solution Approach 1:
The system applies local quality by providing prioritized transmission resources selectively only to UEs that are at the cell edge and likely to experience coverage discontinuity. Not all UEs receive this special treatment - only those in specific locations with specific needs. This localized approach ensures high reliability for vulnerable UEs while avoiding wasteful allocation of premium resources to UEs that don't need them, thus maintaining network resource efficiency.
Solution Approach 2:
The system changes parameters dynamically based on UE conditions. When a UE is in good coverage, it uses standard transmission resources. When the UE approaches the cell edge and detects cell-edge conditions, the system transitions the UE to use prioritized transmission resources with different parameters (higher priority, pre-configured grants). This parameter change ensures reliability only when needed, optimizing overall network resource efficiency.
Data Source
AI summary
Systems, methods, apparatuses, and computer program products for connected mode mobility management for group of users in a vehicle and served by the non-terrestrial network deployments are provided. For example, a method can include detecting, by a user equipment, a cell-edge condition while the user equipment is being served through non-terrestrial radio access. The user equipment can also initiate prioritized transmission conditioned on the detected cell-edge condition and can transmit uplink data transmission using the prioritized transmission before leaving coverage provided by the non-terrestrial radio access.