Keywords gsm, qos, handover management, soft handoff. Types of handovers in wireless communication systems. Pdf handover mechanism is extremely important in cellular network. The easiest type of handover is intra cell handover where either the physical channel or the associated timeslot con figuration is changed. In a microcellular system there are two types of handoff. To introduce new concepts and handover schemes for enhancing and optimizing gsm wireless network performance. Handover type free download as powerpoint presentation. Such a kind of handover is performed to optimize the traffic load in the cell or to improve quality of a connection by changing carrier frequency.
Within 3g umts there are several forms of handover including hard handover, soft handover, a form of handover called softer handover and a handover from one radio access technology to another called interrat handover. What is handover handoff changing the point of connection while communicating. Handover techniques and network integration between gsm. But there was also a very limited market for each type of equipment, so. One of the key aspects of any cellular telecommunications systems is the handover from one cell or sector to another. To provide effective methods for evaluating gsm handover mechanisms as well as cellular network performance. Gsm gprs supports packet data together with cs traffic, with rates up to 171kbps handover in gprs is strongly aligned to gsm handover qos is the main issue in handover of gprs.
The bsc performs the handover and assigns a new radio channel in the new bts, then releases the old bts. There are four basic types of handoffs in gsm network. Handover in gsm and wimax international journal of. This form of handover is supported within gsm and a neighbour list was established to enable this occur easily. As the gsm 2g network is normally more extensive than the 3g network, this type of handover does not normally occur when the ue leaves. Pdf wcdma handover principle and relevant parameters. This form of gsm handover occurs if it is required to change the frequency or slot being used by a mobile because of interference, or other reasons. Handover management in gsm cellular system semantic scholar. Pdf on may 1, 2011, utsho a arefin and others published handover management in. Pdf handover management in gsm cellular system researchgate. T om a umts system to mobile phone fr a gsm system, for example, is a basic equisite for the economic success er pr y to guar a of umts.
The following example will describe soft handover for best case scenario. The standard supports a variety of profiles ho principles are similar in various types of systems. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Alc handover types 1 free download as powerpoint presentation. This type of handover is a typical handover within the gsm system and occurs when the ms moves from one bts to another but stays within the control of same bsc. Pdf handover management in gsm cellular system rakibul. User information is sent all the cell belongs to active set. Learners will be able to point out when different gsm handovers take place. Within the gsm system there are four types of handover that can be performed for gsm only systems. Before describing the above scenario we need to know three important terms. Handover scenarios in gsm systems adio systems without modern mobile r e inconceiv er functionality ar v handoer a v he capability to hand o able. It is the only wage er v s full co antee umts customer om. Handover management in gsm cellular system ijca international.
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