UE Blacklist for Satellite In-Line Interference Management
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Solution Overview
Problem
In wireless communication systems, particularly in satellite communications, in-line interference occurs when a non-geostationary Earth orbit (NGEO) satellite crosses the line of sight path of an Earth station and a geostationary Earth orbit (GEO) satellite, violating regulatory constraints and potentially causing unacceptable interference.
Innovation Solution
The implementation of a user device (UE) and transmission point (TP) configuration that utilizes a list or signaling to prevent in-line interference by avoiding transmission to specific transmission points. The UE stores or receives a blacklist indicating blocked transmission points, and based on this information, it controls access to ensure compliance with regulatory constraints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a movable transmission point (NGEO satellite) is used to provide wireless communication service, then coverage and service flexibility are improved, but in-line interference occurs when it crosses the line of sight path between a user device and a non-movable transmission point (GEO satellite)
Solution Approach 1:
The system performs preliminary actions by generating and distributing a blacklist indicating future in-line interference events before they occur. User devices receive advance notification of blocked transmission points and time windows, allowing them to proactively avoid accessing transmission points that would cause interference, rather than reacting after interference occurs.
Solution Approach 2:
A blacklist mechanism acts as an intermediary between the movable and non-movable transmission points. This intermediary contains identification information of transmission points and associated time windows, mediating the interaction by informing user devices which transmission points to avoid during specific periods, thus preventing interference without directly controlling the transmission points themselves.
2Reliability
If access control measures are implemented to prevent in-line interference, then regulatory compliance is improved, but system complexity increases due to blacklist management and access control procedures
Solution Approach 1:
Instead of implementing complex real-time calculation and prediction mechanisms at each user device, the system uses a simplified approach by distributing a copy of the blacklist information generated by the network. User devices simply store and consult this pre-computed blacklist, which contains identification information and time windows, dramatically reducing device complexity while ensuring regulatory compliance.
Solution Approach 2:
User devices autonomously manage their own access control by locally storing and consulting the blacklist information. Each device independently determines whether to access a transmission point based on its own consultation of the blacklist, without requiring complex centralized control or inter-device coordination, thereby simplifying the overall system architecture.
Data Source
AI summary
A wireless communication system, including: a plurality of time variant transmission points for communicating with a user device, UE, wherein the UE is in a tracking region, wherein the UE is configured to receive and store a list including identifiers, IDs, of time variant transmission points for the tracking region, and wherein the list includes IDs of time variant transmission points which are available or visible for the UE in the one tracking region at different times or time periods.