Mobile Broadband Service » RADIUS http://telecomandinternet.com Telecommunication, Mobile, Modem, Plans and Unlock of Broadband Services Sun, 05 Feb 2012 05:19:24 +0000 en hourly 1 http://wordpress.org/?v=3.2.1 The basic flow of Data service on CDMA platform http://telecomandinternet.com/2009/12/the-basic-flow-of-data-service-on-cdma-platform/ http://telecomandinternet.com/2009/12/the-basic-flow-of-data-service-on-cdma-platform/#comments Thu, 24 Dec 2009 22:42:45 +0000 engineer http://telecomandinternet.com/?p=236 Continue reading]]> Wireless or mobile broadband internet service such as CDMA1x Rtt, GPRS, 3G or EVDO actually involve many telecommunication infrastructures while a session sending by mobile telecommunication subscribers arrive to the core network. Wireless or mobile broadband internet service requires that the telecommunication service involved to this service should run perfectly to avoid an outage of service. The main of telecommunication infrastructures which involve to the wireless or mobile broadband internet service especially on CDMA 1x Rtt are Public Data Serving Node (PDSN), Authentication, Authorization and Accounting (AAA) and charging system. Meanwhile the call flow of data service on CDMA platform are as below

Basically the flow is as follows -

–        the subscriber dials #777 and places a data call

–        the MIN is validated by the MTX

–        the BSC forwards the session request from the PCF to the PDSN

–        the PDSN and the handset begin negotiating a PPP session (LCP phase)

–        the MN supplies a user name and password

–        the PDSN forwards an Authentication request to the RADIUS Authentication server

  • if the Authentication server reply with a REJECT the PDSN tears down the session
  • if the Authentication server does not reply the PDSN retries until it receives a reply or retries are exhausted.  If retries are exhausted the PDSN tears down the session
  • If the Authentication server reply with an ACCEPT the PDSN continues with the session setup

–        the PDSN completes setting up the PPP session to the MN and allocates an IP address

–        the PDSN sends an Accounting START request to the RADIUS Accounting server

  • if the Accounting server does not reply the PDSN keeps retrying
  • if the Accounting server reply  with an acknowledgement the subscriber’s session is allowed to start

–        traffic flows over the subscriber’s session until the session is terminated

–        radio resources are released

–        the PDSN sends an Accounting STOP request to the RADIUS Accounting server

If the Accounting server does not reply the PDSN keeps retrying

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