MSC/VLR Paging Optimization for 2G and 3G Networks
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Solution Overview
Problem
In existing paging technologies, Mobile Switching Centre/Visitor Location Register (MSC/VLR) systems face high load and resource wastage due to issuing paging messages on both Base Station Controller (BSC) and Radio Network Controller (RNC) without identifying the specific network accessed by a mobile station, affecting the process of paging other mobile stations.
Innovation Solution
The MSC/VLR determines the types of networks accessed by a mobile station and issues paging messages accordingly, either on the BSC, RNC, or both, based on International Mobile Subscriber Identifier (IMSI)/MSISDN, Access Restriction Data (ARD), or version information, thereby optimizing resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the MSC/VLR issues paging messages on both BSC and RNC without identifying the specific network accessed by the MS, then the paging coverage is ensured, but the load on BSC and RNC increases greatly and radio paging channel resources are wasted
Solution Approach 1:
The invention segments the paging process by dividing MS into different categories (2G-only, 3G-only, dual-mode) and applying different paging strategies to each segment. This is achieved by determining network access types through IMSI/MSISDN analysis, ARD checking, and version information verification, then routing paging messages only to the appropriate network (BSC for 2G, RNC for 3G), thereby avoiding unnecessary paging on both networks simultaneously.
Solution Approach 2:
The invention applies local quality by tailoring the paging approach to the specific network access characteristics of each MS. Instead of a uniform paging strategy, the system adapts the paging behavior locally based on the determined network access type of each individual MS, ensuring optimal resource utilization for each user while maintaining overall system efficiency.
2Reliability
If the MSC/VLR issues paging messages on both BSC and RNC to ensure all MS are reached, then the paging reliability is improved, but the radio paging channel resources are occupied and wasted
Solution Approach 1:
The invention extracts and removes the unnecessary paging action from the system. By determining the specific network access type of each MS, the system extracts only the required paging path (either BSC or RNC) and eliminates the redundant paging on the other network, thereby preventing radio resource waste while maintaining paging reliability.
Solution Approach 2:
The invention applies partial action by issuing paging messages only on the necessary network based on MS type determination, rather than excessively paging on both networks for all MS. This partial paging approach is sufficient to reach the target MS while avoiding the harmful effects of excessive paging on unnecessary networks.
3Device complexity
If the MSC/VLR cannot identify the network accessed by the MS, then the paging process is simplified, but the load on BSC or RNC increases greatly
Solution Approach 1:
The invention performs preliminary action by determining the network access type of each MS before issuing paging messages. This preliminary determination is achieved through checking IMSI/MSISDN against stored information, verifying ARD, and analyzing version information, allowing the system to prepare the correct paging path in advance and avoid unnecessary paging operations.
Solution Approach 2:
The invention implements feedback mechanisms by using stored information about MS network access characteristics (IMSI/MSISDN, ARD, version information) to guide the paging decision. The system continuously updates and uses this feedback information to make informed paging decisions, optimizing the balance between process complexity and network load efficiency.
Data Source
AI summary
The embodiments of the present invention disclose a method for issuing paging messages and an MSC/VLR, the method includes: determining types of networks terminating the process, if the MS only accesses a 2G network; issuing, by the MSC/VLR, paging messages on an RNC, and terminating the process, if the MS only accesses a 3G network; and issuing, by the MSC/VLR, paging messages on both the BSC and RNC, if the MS accesses both the 2G network and the 3G network. According to the embodiments of the present invention, the MSC/VLR can choose to issue paging messages on the BSC or the RNC separately or on both the BSC and the RNC, since it can determine the types of networks accessed by the MS. Thus, unnecessary paging messages issued on the BSC same time, a great deal of radio paging channel resources on the BSC or the RNC is saved, which greatly reduces effects on the process of paging other MSs.