NTN Paging Area Mapping for Reliable PEI Monitoring
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Solution Overview
Problem
In non-terrestrial networks (NTNs) with moving network entities like satellites, the use of paging early indications (PEIs) for UEs leads to inefficiencies due to changing geographic coverage areas, resulting in wasted signaling and increased power consumption as UEs may not receive PEIs or incorrectly monitor paging occasions.
Innovation Solution
UEs determine their virtual coverage area based on geographic location and use area information to decide whether to monitor for PEIs or downlink control information (DCI) associated with paging occasions, optimizing power consumption and reducing signaling overhead by correctly receiving PEIs even with changing network entities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UEs monitor paging occasions in NTNs with moving network entities, then paging messages can be received, but power consumption increases and signaling overhead is wasted due to incorrect monitoring
Solution Approach 1:
The network entity transmits area information indicating virtual coverage areas before the UE monitors paging occasions. The UE uses this preliminary information to determine whether to monitor or skip, avoiding wasted power consumption on incorrect monitoring while ensuring reliable paging reception when needed.
Solution Approach 2:
The patent introduces dynamic virtual coverage areas that change as network entities move. The UE dynamically adjusts its monitoring behavior based on current virtual coverage area information, transitioning between monitoring and skipping states according to area information received from the network.
2Reliability
If UEs monitor paging occasions in NTNs with moving network entities, then paging messages can be received, but signaling overhead increases due to wasted paging transmissions
Solution Approach 1:
The network entity transmits area information indicating virtual coverage areas before the UE monitors paging occasions. The UE uses this preliminary information to determine whether to monitor or skip, avoiding wasted signaling overhead on incorrect paging transmissions while ensuring reliable paging reception when needed.
3Productivity
If PEIs are transmitted in NTNs with moving network entities, then paging efficiency can be improved, but reliability decreases as UEs may not receive PEIs due to changing coverage areas
Solution Approach 1:
The patent introduces dynamic virtual coverage areas that change as network entities move. The UE dynamically adjusts its monitoring behavior based on current virtual coverage area information, transitioning between monitoring and skipping states according to area information received from the network.
Solution Approach 2:
The patent changes the parameter used for PEI monitoring from static cell identity to dynamic virtual coverage area information. The UE compares area information indicating virtual coverage areas with its current location to determine monitoring behavior, adapting to network entity movement.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may release a connection with a first network entity and determine a first virtual coverage area of the UE based on a geographic location of the UE associated with the release of the connection. The UE may obtain a message that includes area information. The area information may be indicative of one or more second virtual coverage areas, which the UE may use in determining whether to monitor for a paging early indication (PEI). Based on the first virtual coverage area and the one or more second virtual coverage areas may monitor for a paging message, such as the PEI or downlink control information (DCI) associated with a paging occasion.