Wireless Device Access Node Selection Using Signal Quality and Bandwidth Criteria
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Solution Overview
Problem
Wireless devices often experience network entry failures due to insufficient signal quality and available bandwidth when selecting access nodes, leading to delays in establishing communication sessions.
Innovation Solution
The method involves determining signal level and quality criteria from access nodes and comparing them with application requirements to instruct the wireless device to perform an initial access procedure using appropriate radio access technologies, ensuring that the communication link meets the necessary standards for signal quality and data rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If access node selection is based only on received signal level assessment, then the selection process is simple and fast, but the communication link may fail to meet required service levels due to insufficient signal quality or bandwidth
Solution Approach 1:
The patent applies preliminary action by evaluating multiple criteria (signal quality, bandwidth, achievable data rate) before the access node selection is finalized. The network node determines whether the communication link meets required service levels before confirming the connection, preventing future failures and reducing the need for reselection.
Solution Approach 2:
The patent segments the access node selection process into distinct evaluation stages: signal level assessment, signal quality evaluation, bandwidth checking, and service level verification. This segmentation allows each aspect to be evaluated independently and systematically, improving both reliability and operational clarity.
2Reliability
If comprehensive signal quality and bandwidth assessment is performed before access node selection, then communication link reliability is improved, but the selection process complexity and time increase
Solution Approach 1:
The network node performs preliminary determination of service level requirements and compares them against available resources before the wireless device completes the selection process. This preliminary action reduces the burden on the device and streamlines the overall complexity while maintaining high reliability.
Solution Approach 2:
The network node acts as an intermediary that centralizes the complex evaluation of signal quality, bandwidth, and service level requirements. By handling the comprehensive assessment at the network side rather than the device side, the patent reduces device complexity while ensuring reliable link establishment.
3Speed
If access node selection is performed quickly based on signal level, then network entry speed is improved, but network entry failures occur due to insufficient signal quality
Solution Approach 1:
The patent implements preliminary action by having the network node pre-evaluate signal quality, bandwidth, and service level compatibility before confirming access node selection. This preliminary check ensures that quickly selected nodes actually meet service requirements, preventing failures while maintaining fast entry speeds.
Solution Approach 2:
The system uses feedback mechanisms where the network node communicates service level requirements and availability information back to the wireless device during the selection process. This feedback enables the device to make informed quick decisions without compromising reliability, as the feedback provides real-time guidance on suitable access nodes.
Data Source
AI summary
In systems and methods of access node selection, signal level criteria and a signal quality criteria are provided, and a received signal level and a received signal quality are determined based on a signal from the access node to the wireless device. An application requirement is determined of an application running on the wireless device. Based on a comparison of the received signal level and the signal level criteria, a comparison of the received signal quality and the signal quality criteria, and the application requirement, the wireless device is instructed to perform an initial access procedure with the access node.