Prioritized Neighbor Cell Scanning in Heterogeneous Networks
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Solution Overview
Problem
Heterogeneous network deployments complicate the exchange of neighbor cell information between base stations and mobile stations, leading to inefficiencies in scanning procedures, increased power consumption, and degraded communication quality due to the configuration differences between various cell types in hierarchical cell structures.
Innovation Solution
A communication apparatus with a radio transceiver module and processor that receives a neighbor cell advertisement message, prioritizes and scans neighbor base stations based on their properties, categorizes them by cell type, and segments the message into sub-advertisement messages to efficiently manage neighbor cell information, reducing the need to scan all base stations and minimizing bandwidth overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If all neighbor base stations are scanned in heterogeneous networks, then complete neighbor cell information is obtained, but scanning time and power consumption increase significantly
Solution Approach 1:
The neighbor base stations are segmented into different priority levels (first priority, second priority, third priority) based on their cell types and network importance. The scanning process is divided into multiple stages, where high-priority stations are scanned first and low-priority stations are scanned later or skipped under certain conditions. This segmentation allows the system to obtain critical neighbor cell information while significantly reducing the overall scanning time and power consumption.
2Loss of information
If all neighbor base stations are scanned in heterogeneous networks, then complete neighbor cell information is obtained, but power consumption increases significantly
Solution Approach 1:
The scanning process is segmented into priority-based stages, allowing the mobile station to focus power consumption on scanning high-priority neighbor base stations first. When battery power is sufficient, lower-priority stations can be scanned; when power is limited, the system can skip low-priority stations while still maintaining essential connectivity information.
Solution Approach 2:
The system dynamically changes the scanning parameter (priority threshold) based on current power availability and network conditions. By adjusting which priority level of base stations to scan, the system optimizes the balance between information completeness and power consumption, enabling adaptive power management during neighbor cell scanning.
3Loss of information
If neighbor cell advertisement message contains all base station information, then complete information is provided, but bandwidth overhead increases
Solution Approach 1:
The neighbor cell advertisement message is segmented to include only high-priority neighbor base station information in the mandatory portion, while low-priority station information is placed in optional or deferred portions. This segmentation reduces the immediate bandwidth overhead while still providing complete information when needed, allowing the system to balance between message size and information completeness.
4Productivity
If scanning is performed without prioritization, then all base stations are scanned uniformly, but scanning efficiency decreases
Solution Approach 1:
The system performs preliminary classification of neighbor base stations into priority categories before the actual scanning process. By pre-organizing the scanning list based on cell types, network importance, and handover probability, the system enables more efficient scanning execution. This preliminary action adds some complexity to the setup phase but significantly improves overall scanning efficiency by avoiding uniform scanning of all stations.
Data Source
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AI summary
A communication apparatus is provided. The communication apparatus includes a radio transceiver module and a processor. The processor receives a neighbor cell advertisement message from a serving base station via the radio transceiver module and scans neighbor base stations according to information carried in the neighbor cell advertisement message to obtain a measurement result. The neighbor base stations are scanned in a prioritized order