Network Connection Selection Using Neighbor Information
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Solution Overview
Problem
The simultaneous operation of multiple radio access layers in telecommunication networks leads to long call setup times due to the need for user equipment (UE) to search for available base stations of lower-tier radio access layers, which may not be available, especially in emergency situations where quick connection is critical.
Innovation Solution
The UE uses neighbor information from the serving base station to determine the availability of base stations on different radio access layers, allowing it to skip searching for unavailable layers and directly retry the call on a more likely available layer or an alternate network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE searches for available base stations of lower-tier radio access layers when a call attempt fails, then the UE can potentially retry the call on an older radio access layer, but the call setup time increases due to the search process
Solution Approach 1:
The serving base station pre-calculates and provides neighbor information for lower-tier radio access layers in system information blocks before the UE needs to retry a call. This preliminary action allows the UE to immediately identify available base stations without performing a search, thus reducing call setup time while maintaining reliable call retry capability
Solution Approach 2:
The system introduces an intermediary mechanism where the serving base station acts as a mediator between the UE and lower-tier base stations. The base station provides pre-computed neighbor information that guides the UE directly to available base stations, eliminating the need for the UE to independently search and significantly reducing the time required for call retry
2Productivity
If the UE attempts to retry the call on a lower-tier radio access layer without knowing base station availability, then the UE might find an available base station, but it may waste time searching for unavailable base stations
Solution Approach 1:
The serving base station autonomously performs the task of identifying and providing information about available lower-tier base stations. Instead of the UE independently searching (which wastes energy), the system self-services by pre-calculating and broadcasting neighbor information, allowing the UE to efficiently connect without energy-consuming searches
Data Source
AI summary
User equipment (UE) can select a connection type for a retry of a failed call based on system information blocks (SIBs) received from a serving base station of a first radio access layer of a telecommunication network. When the UE experiences a call setup failure of a call attempted through the serving base station of the first radio access layer, the UE can determine whether neighbor information within the SIBs includes information about a neighboring base station of a second radio access layer. If it does, the UE can select a retry connection type as a connection to the neighboring base station of the second radio access layer. If it does not, the UE can select the retry connection type as a connection to an alternate network. The UE can then retry the call through the selected retry connection type.