Dec 2020 – Mar 2023 · 2 yrs 3 mos

Mar 2019 – Nov 2020 · 1 yr 8 mos

Oct 2016 – Mar 2019 · 2 yrs 5 mos · Bangaon Area, India

Oct 2014 – Oct 2016 · 2 yrs · Bengaluru Area, India

Mar 2013 – Sep 2014 · 1 yr 6 mos · Gurgaon, India

• EPS Bearer-Modify Implementation in L3 of eNodeB
• The purpose of the EPS bearer context modification procedure is to modify an EPS bearer context with a specific QoS and TFT. The EPS bearer context modification procedure is initiated by the network, but it may also be initiated as part of the UE requested bearer resource allocation procedure or the UE requested bearer resource modification procedure.
• The network may also initiate the EPS bearer context modification procedure to update the APN-AMBR of the UE. The MME shall initiate the EPS bearer context modification procedure by sending a MODIFY EPS BEARER CONTEXT REQUEST message to the UE. The MME shall include an EPS bearer identity that identifies the EPS bearer context to be modified in the MODIFY EPS BEARER CONTEXT REQUEST message.
• If this procedure was initiated by a UE requested bearer resource allocation procedure or a UE requested bearer resource modification procedure, the MODIFY EPS BEARER CONTEXT REQUEST shall contain the procedure transaction identity (PTI) value received by the MME in the BEARER RESOURCE ALLOCATION REQUEST or BEARER RESOURCE MODIFICATION REQUEST respectively.
• S1-Based Intra-LTE Handover Implementation for Source eNodeB Side
• In this feature we have implemented the source eNodeB call flow messages coming from/to MME and eNodeB also messages between eNodeB and UE.The S1-based handover procedure is used when the X2-based handover cannot be used. This can be triggered e.g. by no X2 connectivity to the target eNodeB, or by an error indication from the target eNodeB after an unsuccessful X2-based handover, or by dynamic information learnt by the source eNodeB.The source eNodeB initiates a handover by sending Handover Required message over the S1-MME reference point. The source eNodeB decides which of the EPS bearers are subject for forwarding of downlink and optionally also uplink data packets from the source eNodeB to the target eNodeB.

Sep 2011 – Feb 2013 · 1 yr 5 mos · Bhubaneshwar Area, India

• CSFB Handling due to “UE Context Modification” in eNodeB
• Circuit Switched Fallback (CSFB) is a technology whereby voice and SMSservices are delivered to LTE devices through the use of GSM or another circuit-switched network.
• Circuit Switched Fallback is needed because LTE is a packet-based all-IP network that cannot support circuit-switched calls. When an LTE device is used to make or receive a voice call or SMS, the device "falls back" to the 3G or 2G network to complete the call or to deliver the SMS text message.
• In this Feature we have received csfb indicator in UE Context modification coming from MME.
• MME sends the UCM after receiving Extended Service request from UE.We have developed the handling of UCM as per the decision taken by RRM.