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gprs sgsn capacity testing 2008

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Core Network Trends  A trend in wireless core infrastructure development is that fewer network elements (such as SGSN’s – Serving GPRS Support Node) handle more subscriber s and more traffic. This trend is driven by demand from operators to lower operating costs of their networks. To day, an increasing number of mobile phones that are sold glob- ally are GPRS capable . As a result, most subscrib ers that ent er the network consume system resources from the SGSN: the mobile phone “atta ches” to the SGSN and remains regi stered. For network equipment manufacturer s, the growth and evolution of mobile data applications results in challenges to develop and test large and sc aled networ k elements. Usually , several shelv es of processing cards have to be combined to one network element in order to be able to provide the required levels of performance. What are the side effects of combining multiple shelves to one network element? What happens if the number of subscribers in a service area reaches the limit of what the network element can handle? – Testing real-world and worst-case scenarios prior to deployment becomes essential. Capacity Testing The way to verify and ensure the ability of a network element to handle large quantitie s of subscribers is capacity test ing. The focus of capacity testing is to emulate the maximum number of expected subscribers with their typical signaling and service usage behavior. Capacity Test Objectives Following is a list of the main capacity test objectives: – Te st the system to it's maxi mum subscriber capability – Overload the network elements to point of failure to determine weak design elements – Verify the syst em stability over extended period s of time with high and changing subscriber volumes – Find memory l eak s – Generate background traffic for funct ional tests GPRS SGSN Capacity Testing Ensure GPRS SGSN products operate at full load under various traffic conditions and create load conditions that support comprehensive  functional and diagnostic testing. Build mobile networks that process  traffic reliably and error free under real-world load conditions.  Application Note 1 www.tektronix.com/signaling

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Page 1: GPRS SGSN Capacity Testing 2008

8/3/2019 GPRS SGSN Capacity Testing 2008

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