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Long-term evolution is the next-generation network beyond 3G. In order to initiatively imitate and improve network performance, by research and analysis of signaling message which is transmitted in the LTE network architecture, a decoder module is needed. In this paper, the decoding modules for decoding S3, S4, S5/S8, S10 and S11 interfaces, which...
Citations
... The basics of network monitoring applied to LTE core system monitoring are summarized in [9]. In [10] the authors describe protocol decoders for LTE, and raise similar issues that our current paper raises and solves.There are also descriptions availale for complete performance management solutions for the backhaul [12] and for end-to-end services [11] -these use the results of LTE EPC monitoring systems, for which an example is presented in the current paper. A CDR synthesis-system for the S1-MME interface is described in [13] -this system shares the fundamentals with the SGA system described in the following sections. ...
Gathering and processing data for performance and fault management continues to be a burning issue, from LTE operations and maintenance point of view. Regarding the Evolved Packet Core (EPC), this is especially true, since it has newly defined interfaces, with new protocols - some of them are even ciphered. Network-wide data capture and analysis for the EPC requires new processing methods. These would allow operators to correlate control and user plane information of various interfaces and protocols. There are many obstacles to overcome here, including ciphered control messages and global identifiers hidden by temporary ones. This paper presents a system for S1AP session data record assembling, it shows what key parameters are needed to be extracted in order to enable expert analysis. The deciphering mechanism is especially important here, hence we discuss how its success affects analysis results. We present Call Data Record assembling methods for various scenarios - such as network attachments or tracking area changes. Furthermore, this paper presents the methods for gathering cross-correlated data on specific fault management use-cases, especially for unsuccessful voice calls.
Due to the rapid development of communication networks and content services, the Serving GPRS Support Node (SGSN) plays an important role in the GPRS core network. However, as the number of users' population and requirement both keep increasing, the conventional architecture cannot provide a satisfied performance. Therefore, in this paper firstly we present a novel solution to use SGSN pool based on path diversity. Then the related theoretical analysis is given to prove that the method is effective in reducing network load and improving system reliability. Finally, we show the experiment results by the implementation of the systems.
In view of the existing decoding scheme of poor portability and low efficiency, the article analyzes the basic concepts, functions and message structure of the Diameter protocol in LTE (Long Term Evolution) network, then puts forward innovative decoding solutions by using dictionary method to resolve Diameter protocol. After testing by the current network data, the scheme has been verified to be correct and feasible, and effectively solves the decoding issue of Diameter protocol different message types in the LTE network.
