Author: prodevelopertutorial

Question: Given a binary tree, get the total number of nodes in it. Example: Consider the image given below: Form the image above, The total number of nodes are 7. Solution: This problem can be solved by recursive traversal. Assume if you have only one node, …

Question: Given a binary tree, get the difference of the sum of the nodes at odd level and sum of the nodes at even level. Example: Consider the image given below: Form the image above, The sum of nodes at odd level is 16 + 7 …

As we discussed in previous chapter, handover is based on 3 steps as below: 1. HO Preparation 2. HO Execution 3. HO Completion 1. HO preparation Consider the image below We have 2 eNB, source eNB and Target eNB. We have MME and SGW. SGW is …

In this chapter we shall learn about 1. RSRP and RSRQ 2. Handover events 3. Introduction to handover. RSRP: Reference Signal Receive Power. It is the average power of Resource Element that carry cell specific Reference Signal.   RSRQ: Reference Signal Received Quality Both of the …

Types of SIP Request INVITE : We will send INVITE request to invite a user to a call. ACK : Acknowledgment (ACK) message is sent in response to INVITE request. BYE : It is used to terminate a SIP session. CANCEL : Terminates an INVITE request. …

In this chapter we shall see SIP Registration and SIP Invite call flow.   SIP REGISTRATION Call flow: User1 SIP Server | | | REGISTER M1 | |------------------------------>| | 401 Unauthorized M2 | |<------------------------------| | REGISTER M3 | |------------------------------>| | 200 OK M4 | |<------------------------------| | …

In this chapter we shall look at VoLTE IMS Invite Call Flow. Below image shows in brief of INVITE request if both UE are in same IMS Network Below image shows in brief of INVITE request if both UE are in same IMS Network Before UE …