Dynamic Neighbor List Updates for Mobile Relay Discovery
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Solution Overview
Problem
In wireless communication systems, mobile relays with changing locations lead to inefficient UE reselections due to static neighbor lists, causing resource wastage and potential decoding failures from PCI collisions, especially in environments with limited base station coverage.
Innovation Solution
A method where a network entity determines the proximity of mobile relays to UEs and sends assistance information to dynamically update the neighbor list, allowing UEs to efficiently discover and select suitable mobile relays based on distance and load conditions, thereby minimizing reselections and PCI collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If static neighbor lists are used in wireless communication systems, then device complexity is reduced and ease of operation is improved, but reliability deteriorates due to PCI collisions and inefficient UE reselections in mobile relay environments
Solution Approach 1:
The patent implements dynamic neighbor list updates by having the network entity determine current relay locations and identify suitable relays based on UE location and relay load conditions. This transforms the static neighbor list into a dynamic structure that adapts to mobile relay movements, resolving the contradiction between connection stability and system complexity.
Solution Approach 2:
The system establishes feedback loops where UEs report received power measurements and relay load conditions to the network entity, which then updates neighbor lists accordingly. This feedback mechanism enables the system to maintain reliable connections while automatically adapting to changing relay positions without manual intervention.
2Reliability
If dynamic neighbor list updates are implemented to track mobile relay locations, then reliability improves by reducing PCI collisions, but device complexity increases due to continuous location tracking and list updates
Solution Approach 1:
The network entity serves as an intermediary that centralizes the complexity of location tracking and neighbor list management. Instead of individual UEs tracking relay locations independently, the network entity performs this function centrally and provides updated neighbor lists to UEs, thereby improving handover success rates while managing complexity at the network level rather than device level.
Solution Approach 2:
The system performs preliminary actions by pre-calculating and providing neighbor lists to UEs before handovers are needed. The network entity identifies suitable target relays in advance based on current locations and load conditions, so when handovers are required, UEs can quickly execute them without performing complex real-time searches, thus improving reliability while reducing instantaneous device complexity.
3Adaptability or versatility
If UEs perform frequent reselections to track mobile relays, then adaptability improves by maintaining connectivity, but productivity deteriorates due to resource wastage and increased reselection overhead
Solution Approach 1:
The network entity performs preliminary identification of suitable target relays and provides this information to UEs in advance through updated neighbor lists. This allows UEs to adapt to mobile relay movements efficiently by following pre-computed recommendations rather than performing frequent independent searches, thereby maintaining connectivity while reducing resource wastage from excessive reselections.
Solution Approach 2:
The system uses feedback mechanisms where UEs report their current status and received power measurements to the network entity, which then optimizes neighbor list updates accordingly. This feedback loop enables the system to balance adaptability and productivity by updating neighbor lists only when necessary, avoiding unnecessary reselections while maintaining connectivity as relays move.
Data Source
AI summary
A configuration for dynamically updating the neighbor list sent to a UE based on the location of the UE and the location of one or more mobile relays. The apparatus receives first location information for one or more UEs. The apparatus receives second location information for one or more mobile relays. The apparatus determines a distance between the one or more UEs and each of the one or more mobile relays. The apparatus sends assistance information to at least one of the one or more UEs in an area, the assistance information identifying at least one mobile relay of the one or more mobile relays based on the determined distance between the one or more UEs and the at least one mobile relay.