Roles and Responsibilities: As Lead Engineer I was responsible for the development of the IMS based RCS messaging application and VoLTE solution for mobile devices.The solution development involved the implementation of messaging solutions complying with the RCS specification, for IMS/Internet domain using SIP protocol.The Messaging features developed include 1:1 chat, File Transfer and Group Chat solutions.The RCS features developed uses SIP as the signalling protocol… Show more Roles and Responsibilities: As Lead Engineer I was responsible for the development of the IMS based RCS messaging application and VoLTE solution for mobile devices.The solution development involved the implementation of messaging solutions complying with the RCS specification, for IMS/Internet domain using SIP protocol.The Messaging features developed include 1:1 chat, File Transfer and Group Chat solutions.The RCS features developed uses SIP as the signalling protocol with MSRP as the media protocol.RCS 1:1 chat service is SIP session based peer to peer messaging session with delivery/display notification feature which notifies the message sender about the message delivery and display at the remote user.RCS Group Chat which uses SIP Adhoc conference to establish a group session where in multiple users are involved.RCS File Transfer service allows user to transfer files to a remote user over a SIP/MSRP session.SLM features like Pager/Large mode messaging is used as fall back mechanism when the session based 1:1 messaging fails.The solution also caters to ePDG based handover from LTE to WiFi and vice-versa. Also worked as part of VoLTE solution development complying with IR92. Show less

Roles and Responsibilities: Realize a home networking solution of networked UPnP A/V components on Linux platform and mobile hand held devices communicating among each other. C/C++ based Open source applications were used for the above mentioned UPnP Device classes. Analyzed and modified the open source applications to realize functionality required for the above mentioned home networking solution. This involved modifying the Gstreamer based UPnP media renderer (player)… Show more Roles and Responsibilities: Realize a home networking solution of networked UPnP A/V components on Linux platform and mobile hand held devices communicating among each other. C/C++ based Open source applications were used for the above mentioned UPnP Device classes. Analyzed and modified the open source applications to realize functionality required for the above mentioned home networking solution. This involved modifying the Gstreamer based UPnP media renderer (player). The POC also involved integrating a SIP telephony module into the home networking setup, allowing the user to consume the audio/video stream of the incoming video call on any of the networked UPnP devices he possessed.As part of this use case, developed a control point functionality interacting with SIP module on Java based OSGi Framework which exposed SIP and UpnP APIs. Worked as a developer to develop an web based NMS(Network Management System) tool to measure the KPIs of the network femtocell access points. Show less