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USSD Gateway - Wikipedia, the free encyclopedia.pdf

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9/6/14 USSD Gateway - Wikipedia, the free encyclopedia USSD Gateway From Wikipedia, the free encyclopedia Jump to: navigation, search USSD is a protocol used by GSM cellular telephones to communicate with the service provider's computers. USSD stands for Unstructured Supplementary Services Data. A gateway is the collection of hardware and software required to interconnect two or more disparate networks, including performing protocol conversion.[1] Contents [hide] 1 What is a USSD Gateway? 1.1
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  9/6/14USSD Gateway - Wikipedia, the free encyclopediafile:///D:/New folder (3)/  ر ﺷ /USSD Gateway - Wikipedia, the free encyclopedia.htm1/4 USSD Gateway From Wikipedia, the free encyclopediaJump to: navigation, search USSD is a protocol used by GSM cellular telephones to communicate with the service provider's computers. USSD stands for Unstructured Supplementary Services Data . A gateway is the collection of hardware andsoftware required to interconnect two or more disparate networks, including performing protocol conversion. [1   ] Contents  [hide] 1 What is a USSD Gateway?1.1 Difference between USSD and other Gateways2 Modular Operation2.1 Notes3 References What is a USSD Gateway?[edit] A USSD Gateway routes USSD messages from the signaling network to a service application and back. A USSD gateway service is also called a USSD center . USSD Gateway  is based upon the ability of the delivery agent or the source to send and receive USSDmessages. A USSD is a session-based protocol. USSD messages travel over GSM signaling channels and areused to query information and trigger services. Unlike similar services(SMS and MMS), which are store andforward  based, USSD establishes a real time session between mobile handset and application handling theservice Difference between USSD and other Gateways[edit] The difference between USSD Gateways and other messaging gateways is that USSD gateways maintain asingle interactive session once the connection is established... (SMS and MMS store and forward messages independently of the user session, similar to the way email is sent over the internet. Modular Operation[edit] 1. Session Module : As per directions from the SS7 (Signaling System 7) protocol stack’s MAP (Mobile Application Part), it receives and sends out session IDs from the session ID pool, and maintains anddestroys the sessions.2. MAP layer: Mobile Application Part is present both on the server and on the MS.3. Gateway: A Gateway will wait for messages from the MAP layer and work to route these messages into  9/6/14USSD Gateway - Wikipedia, the free encyclopediafile:///D:/New f older (3)/  ر ﺷ /USSD Gateway - Wikipedia, the free encyclopedia.htm2/4 SMPP protocol which is then delivered to the server applications. This is the most important operation,and this is the reason why USSDs are primarily used, as it helps to directly connect users to applicationslike  bill checking and others.4. Locator: This tries to find out the current cell and relays it to the Gateway. Then the messages are routed using Routing Numbers.5. Home Location Register : This is the home zone where the given cell phone’s number is registered in the data base. This is different from the Visitor Location Register  which is where the user is roaming. 6. The reason why USSD is commonly used is because it enhances the WCDMA signalling and multiplexesthe coherent signals.Typical A p plications:Balance Check: The user can send a Process Supplementary Service request (PSSR) to the home zonewhich will forward this, under guidance from the Gateway, to the correct application. Then, the applicationsends an acknowledgement via USSD Gateway, HLR etc. known as PSSR response back to the user.Balance Notification at the end of charged call can also be given using Unstructured SupplementarySer vice Notify (USSN) message.Voice Chat: Using the same process as above, one can use voice chat. This is highly useful when VoIP ena bled phones are not available.Advertising: The application can advertise their product using USSD which is less invasive thantelemarketing.Roaming: This has huge advantages while roaming. This is because USSD services are well available inroaming networks and all the USSD messages are directed towards the subscriber's Home Network itself , thus, same set of services that are available in home network can be given in visited network too,giving subscribers a Virtual Home Environment (VHE).Apart from PSSR and USSN, there is another method called Unstructured Supplementary Service Request(USSR) message that initiates a session by USSD Gateway to a Mobile User. This message can be used inconjunction with USSR initiated session to provide session based services like Menu services through USSD.Also, in the earlier phases of MAP (Mobile Application Part), PSSR message was called PSSD (PSS Data). Notes[edit] 1. ^  Webster's New World Telecom Dictionary Copyright © 2010 by Wiley Publishing, Inc., Indianapolis,Indiana. http://computer.yourdictionary.com/gateway References[edit] 1. SS7 Protocol Architecture, Lee Dryburgh & Jeff Hewett, Third Edition.2. USSD https://www.facebook.com/USSD2 Retrieved f rom http://en.wikipedia.org/w/index.php?title=USSD_Gateway&oldid=590664063 Categories:Mo bile telecommunications standards3GPP standards  9/6/14USSD Gateway - Wikipedia, the free encyclopediafile:///D:/New folder (3)/  ر ﺷ /USSD Gateway - Wikipedia, the free encyclopedia.htm3/4 GSM standard Navigation menu Personal tools Create accountLog in Namespaces ArticleTalk  VariantsViews ReadEditView history MoreSearch   SearchGo Navigation Main pageContentsFeatured contentCurrent eventsRandom articleDonate to WikipediaWikimedia Shop Interaction HelpAbout WikipediaCommunity portalRecent changes  9/6/14USSD Gateway - Wikipedia, the free encyclopediafile:///D:/New folder (3)/  ر ﺷ /USSD Gateway - Wikipedia, the free encyclopedia.htm4/4 Contact page Tools What links hereRelated changesUpload fileSpecial pagesPermanent link Page informationWikidata itemCite this page Print/export Create a book Download as PDFPrintable version Languages Edit linksThis page was last modified on 14 January 2014 at 13:45.Text is available under the Creative Commons Attribution-ShareAlike License; additional terms mayapply. 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