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How the handover handled in UMTS and its types?

How the handover handled in UMTS and its types?

UMTS handover types Within UMTS it is possible to define a number of different types of UMTS handover or handoff. Soft handover: This form of handover is a more gradual and the UE communicates simultaneously with more than one Node B or base station during the handover process.

What is UMTS hard handover?

Hard Handover. Hard handover means that all the old radio links in the UE are removed before the new radio links are established. Hard handover can be seamless or non-seamless. Seamless hard handover means that the handover is not perceptible to the user.

What are the types of handover in mobile computing?

There are two types of handover, vertical and horizontal. Horizontal handover occurs when a device moves within one type of network technology under one operator. For instance a mobile phone user moving within their provider’s network must switch cellular towers as they move in and out of range of different towers.

How many types of handover are there in mobile communication?

two types
Handover is a core element in deploying mobile transmission as it creates data sessions or connects phone calls between mobile devices which are constantly on the move. There are two types of handover. Soft handover and hard handover.

What are the two reasons for handover?


  • Handover Changing the base station.
  • Reasons for Handover Two reasons for handover  Mobile Station moves out of station causes decrease in received signal.

What is handover and its types?

There are two types of handover which are as follows : Hard Handoff : hard handoff is the process in which the cell connection is disconnected from the previous cell before it is made with the new one. Soft Handoff : It is the process in which a new connection is established first before disconnecting the old one.

What is blind handover?

Blind handover or redirection refers to that a base station directly orders a UE to switch or redirect to a certain target cell without requiring the UE to measure an adjacent cell and to report a measurement result.

What is handover procedure?

Handover procedures are a key function of LTE eNBs. They are intended to reduce interruption time compared to the circuit-switched handover process in 2G networks. Handover within an E-UTRAN. The procedure for when a UE is leaving a cell managed by the eNB and entering a cell managed by a second eNB.

What are the different types of handover for UMTS?

For UMTS the following types of handover are specified: Handover 3G -3G (i.e. between UMTS and other 3G systems) FDD soft/softer handover FDD inter-frequency hard handover FDD/TDD handover (change of cell) TDD/FDD handover (change of cell) TDD/TDD handover Handover 3G – 2G (e.g. handover to GSM)

Is there Handbook of UMTS / WCDMA call flows for handovers?

It is a handbook of UMTS/WCDMA call flows for Handovers. This document is originally edited by Justin MA and it is free to share to everyone who are interested. All reference/resource are from internet. If there is any copy-right issue, please kindly inform Justin by [email protected].

How often is the UE in soft handover?

In a typical UMTS system, the UE is in soft/softer handover around 50% of the time. One of the very important requirements for the soft/softer handover is that the frames from different cells should be within 50ms of each other or this would not work.

When does UE reach end of coverage area for UMTS services?

When UE reaches end of coverage area for UMTS services, it can handover to a 2G service like GSM (if the UE supports multiple RAT). Inter-RAT handover procedure can be initiated in variety of ways.