Unstructured Supplementary Service Data (USSD) is a protocol used by GSM cellphones to communicate with their service provider’s computers. USSD can be . Unstructured Supplementary Service Data (USSD), sometimes referred to as ” Quick Codes” or USSD can be used to provide independent calling services such as a callback service (to . GSM (ETSI EN , V) Specification (USSD) Stage 3 – 3GPP; USSD Technology and packet flow in GSM network. USSD Call FLowThere are two types of USSD — 1. Network Initiated – Push Mode 2. User Initiated – Pull Mod.
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Figure 5 shows the flow diagram for a mobile-initiated USSD request. USSD can be used for WAP browsing, prepaid callback service, mobile-money services, location-based content services, menu-based information services, and as part of configuring the phone on the network. For many operators, prepaid now represents up to 80 percent or more of their subscriber base.
Messages sent over USSD are not defined by any standardization body, so each network operator can implement whatever is most suitable for its customers. Please help improve this section or discuss this issue on the talk page. When a user sends a message to the phone company network, it is received by a computer dedicated to USSD. But some of these newly introduced services are not recognized by older Mobile Stations MSs. The offered services are also not transparent, as the user needs to initiate the service by using a special service code.
That means a customer served via self-driven USSD service is times cheaper than a dedicated live agent answering customer queries and 10 times cheaper than the IVR system. If the MS releases the transaction at any time e. It is a messaging service that is almost seven times faster than SMS and is highly cost effective.
The mobile user responds with the amount to add. The analysis given should not to be considered an exhaustive or fully objective list. The asterisk and hash codes are much like simple programming codes in that they signify the beginning and end of the request.
The MS processes the operation if it is in a state in which it can handle the operation. This indicates that the requested task could not be completed because of a problem in another entity.
If the caller does not qualify, an appropriate notification is sent by using the unstructured SS notify procedure. There, it is typically stored in an unencrypted form, making it unsecure at also the second step.
This parameter contains the alphabet and the language information used for the unstructured information in a USSD operation. The benefits of the USSD technology look promising. As GSM networks evolved, packet-oriented data transmission was introduced.
Because the MSC initiated the transaction, it is also responsible for controlling the transaction. This is clearly valued by the users.
Unstructured Supplementary Service Data
Retrieved from ” https: This kind of service can both generate a lot of revenue for the operator and help mobile manufacturers service their customers with updated software. If the application requests more information, it initiates a USSD requestusing the ongoing transaction.
Some operators use USSD to provide access to real-time updates from social-networking websites like Facebook and Twitter. If the application in the MSC needs to send further operations to the same MS, it will continue to use the same transaction until all operations are completed.
In other words, an SMSC is not present in the processing path. Once the call is established between roamer and intended called party, the HPLMN monitors the service usage against the available balance in real time.
USSD Call Back | Rauf’s Knowledge Portal
The possible error types are as follows: Notify me of new posts via email. Still, many more innovative M-commerce applications can be thought of and serviced to make our communication easier. Using the latest USSD calp, the operator can float new services and various applications at much cheaper rates while enhancing operational efficiency and generating incremental revenues by delivering practical value to the prepaid customer base.
The string is sent either by the mobile user or the network.
Unstructured Supplementary Service Data – Wikipedia
By continuing to use this website, you agree to their use. You are commenting using your Twitter account. However, the churn rate is very high, and gaining the loyalty of prepaid subscribers poses a great challenge for mobile operators. This medical care application was just an example to demonstrate how USSD can be used in the health sector.
There are many ways to implement prepaid roaming.
USSD can be accessed via two locations: Client-side technologies include J2ME. If the alphabet is not understood. The process unstructured SS request message contains the following parameters: Taking early disease-prevention measures, educating people about their symptoms, providing anonymous counseling, gathering data, linking patients to services, and many other such acts can go a long way in improving the health of developing nations. Data security with SMS banking SMS service is deemed to be the least secured of the technologies suggested for mobile banking because of the number of points where the SMS data is available to others in a clear or unencrypted format.
Subscriber does not have to create a message.
If the application decides to terminate the dialogue, the network side sends a release complete message.