MME LTE Access Rejection with Extended Cause Information
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
LTE capable wireless devices without LTE access permission often experience service delays and no-service issues due to unauthorized access attempts, leading to inefficient network usage and user experience problems.
Innovation Solution
The Mobility Management Entity (MME) provides additional information when rejecting LTE access requests, indicating forbidden tracking areas or disabling LTE capabilities to prevent unauthorized access, thereby reducing no-service delays and optimizing network usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If LTE capable wireless devices attempt to access LTE networks without permission, then the device can potentially use LTE services, but this causes service delays and no-service issues due to rejection
Solution Approach 1:
The MME performs preliminary authentication and authorization checks before allowing LTE access. By pre-determining whether the device has permission to access LTE in a tracking area, the system prevents unauthorized access attempts that would otherwise result in rejection delays. The device is provided with authorization information in advance, allowing it to avoid futile access attempts and switch to alternative networks proactively.
2Reliability
If the MME rejects LTE access requests from unauthorized devices, then network security and proper service allocation are maintained, but this causes service delays and user experience problems
Solution Approach 1:
The MME provides feedback to the wireless device regarding its LTE access authorization status in a tracking area. This feedback mechanism allows the device to understand whether it is permitted to access LTE services, enabling it to make informed decisions about network selection. The device receives authorization information that guides its access behavior, preventing repeated rejection cycles and improving user experience while maintaining network control.
3Adaptability or versatility
If wireless devices continuously attempt LTE access in forbidden areas, then the device maintains LTE capability readiness, but this causes repeated access failures and network congestion
Solution Approach 1:
The system applies preliminary anti-action by providing the device with authorization information that indicates whether LTE access is permitted in a tracking area before the device attempts access. This pre-information allows the device to avoid unauthorized access attempts proactively. When authorization information indicates that LTE access is not permitted, the device can switch to alternative networks (such as 3G or 2G) without attempting LTE access, thereby eliminating the harmful effect of repeated access failures and reducing network congestion from rejected attempts.
Data Source
AI summary
This disclosure relates to reducing or mitigating no-service delays for LTE capable wireless devices which do not have permission to access one or more LTE networks. According to some embodiments, a MME of a first PLMN may receive an LTE NAS request corresponding to a tracking area from a wireless device. The MME may determine to reject the request, and may send a rejection response to the request indicating that access to the first PLMN in the tracking area according to LTE is not available to the wireless device. The rejection response may further include extended cause information relating to whether or not the wireless device is permitted to access the first PLMN in other tracking areas according to LTE.