Layer-Based Mobility Handling in Ultra Dense Networks
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Solution Overview
Problem
In Ultra Dense Networks (UDNs), frequent service area transitions due to the close proximity of network nodes lead to significant burdens on communication and processing resources, as current LTE systems require handover processing for every transition, which is inefficient and resource-intensive.
Innovation Solution
A communication signal 'layer' approach is proposed, where joint detection and decoding methods like Successive Interference Cancellation (SIC), Message Passing Algorithm (MPA), or Maximum Likelihood Detection (MLD) allow User Equipment (UE) to jointly receive and decode signals from multiple network nodes, with dynamic network node associations, enabling transparent service area transitions without explicit handover processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If handover processing is performed for every service area transition, then mobility support is maintained, but communication and processing resources are significantly consumed
Solution Approach 1:
The patent merges the service area transition function with the existing handover mechanism. When a UE moves between service areas, the source network node directly forwards data to the target network node without requiring explicit handover processing, combining location management and data transmission into a single operation.
Solution Approach 2:
The patent extracts the handover processing step from the service area transition procedure. By separating the data forwarding function from the handover signaling, the system maintains mobility support while eliminating redundant processing for transitions that occur within the same handover context.
2Adaptability or versatility
If handover processing is performed for every service area transition, then service area transitions are supported, but system efficiency decreases
Solution Approach 1:
The patent combines service area transition handling with existing data routing mechanisms. The source network node uses its routing table to directly forward data to the target network node based on the UE's current service area, merging location tracking and data transmission into a unified process that maintains adaptability while improving efficiency.
Solution Approach 2:
The patent performs preliminary routing setup by maintaining routing tables at network nodes that map UEs to their current serving network nodes. This pre-established routing information enables direct data forwarding during service area transitions without requiring real-time handover processing, improving system efficiency while maintaining full transition support.
3Measurement precision
If explicit handover processing is required, then mobility management is precise, but resource utilization is suboptimal
Solution Approach 1:
The patent extracts the essential mobility management function from the handover processing procedure. By separating the data forwarding operation from the handover signaling sequence, the system maintains precise tracking of UE location and service area transitions while eliminating redundant processing steps that consume resources.
Solution Approach 2:
The patent enables the source network node to autonomously forward data to the target network node using pre-stored routing information. The network node itself performs the data redirection without requiring external handover commands,实现ing self-service mobility management that maintains precision while reducing resource consumption.
Data Source
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AI summary
User Equipment (UE) mobility in Ultra Dense Networks (UDNs) is based on communication signal layers, which could include respective data streams in an Orthogonal Frequency Division Multiplexing (OFDM) domain, a code domain using respective codebooks, and/or a spatial domain, for example. A UE uses candidate layer decoding parameters in applying layer-based decoding to communication signals that it received from network nodes. Layers could be allocated to UEs and transition between network nodes as UEs move between different network service areas. Layers could instead be allocated to network nodes. Layer-based decoding provides for UE mobility without requiring explicit handover processing every time a UE moves between different service areas.