Mobile Station Call Restriction via Time-Bound NAS Rejection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current mobile communication systems are limited in their ability to flexibly restrict calls from specific mobile stations, as they can only restrict the establishment of all connections, failing to address the need for selective call management.
Innovation Solution
A mobile communication method and system that includes a mobile station and a mobile switching center, where the mobile station restricts AS and NAS connection establishment requests after receiving a rejection signal with a specified restriction time, allowing for flexible call restriction based on predetermined conditions such as traffic thresholds or contract terms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the mobile communication system rejects calls from a mobile station to preserve radio resources, then radio resource preservation is improved, but the mobile station will repeatedly make calls after rejection causing loss of time and increased device complexity
Solution Approach 1:
The system performs preliminary action by sending a rejection signal with restriction time information before the mobile station can repeatedly attempt call establishment. This preemptive measure prevents the mobile station from wasting time on futile reconnection attempts during the restriction period, thereby resolving the contradiction between resource preservation and time loss.
2Ease of operation
If the mobile communication system restricts establishment of all connections by a specific mobile station, then call management is simplified, but flexibility in managing specific communication types is reduced
Solution Approach 1:
The invention segments the call restriction mechanism by introducing cause values that categorize different rejection reasons (e.g., emergency calls, roaming calls, specific APN connections). This segmentation allows the system to maintain simple overall management while enabling flexible, differentiated restriction policies for specific communication types, thereby resolving the contradiction between ease of operation and adaptability.
3Device complexity
If the system sends a rejection signal without restriction time information, then the signal format is simpler, but the mobile station cannot know when to resume connections causing increased loss of time
Solution Approach 1:
The rejection signal includes restriction time information that specifies when the mobile station can resume connection attempts. This preliminary information provision eliminates the need for complex retry logic and timing calculations at the mobile station, maintaining signal format simplicity while preventing time loss through informed resumption timing.
4Reliability
If the mobile station continuously attempts to establish connections after rejection, then connectivity reliability is improved, but radio resource consumption increases
Solution Approach 1:
The system dynamically adjusts connection attempt behavior by implementing time-based restriction periods. During the restriction period, connection attempts are suppressed to conserve resources. After the restriction period expires, the mobile station can resume connection attempts, maintaining reliability. This dynamic approach resolves the contradiction between reliability and resource consumption.
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
A mobile communication method according to the present invention includes the steps of: transmitting, to a mobile switching center MME/SGSN, a NAS connection establishment request for the specific communication, while an AS connection is established between the mobile station UE and a radio access network apparatus eNB/RNC; determining, at the mobile switching center MME/SGSN, to restrict establishment of the NAS connection for the specific communication, when the NAS connection establishment request signal is received and when a predetermined condition is satisfied; and restricting, at the mobile station UE, transmission of a first connection establishment request signal and transmission of the NAS connection establishment request signal, after reception of a rejection signal including a restriction time period for restricting establishment of the NAS connection for the specific communication until expiry of the restriction time period.