cellular system in mobile communication ppt

Added load on the processor of the MS in comparing signal strength of nearby BTS.Reduced traffic at the BSC/ MSC as the decision to switch is taken by the MS.Reduced handoff time as the device is responsible for facilitating the handoff.Mobile-Assisted HandoffĪ mobile-assisted handoff (MAHO) is a process used specifically in GSM networks where a mobile phone assists or helps the BTS to transfer a call to another BTS, with stronger signal strength and improved connectivity. Chances of calls being dropped are very high.ĭelayed handoffs are generally used when users are somewhere where dead spots (areas where there is no network coverage) are quite common.

The quality of the call could go for a toss.Help in handling the call more adequately.If it goes below the threshold, the call is dropped. In such a case, the call generally continues until the signal strength reaches a certain threshold. First, we will see inter-MSC handoffs, which are the ones that occur when the user moves from one MSC to another.Ī delayed handoff occurs when no BTS is available to accept the transfer. Next, we will have a look at the above types of handoffs, their advantages and disadvantages, and where they are used. There are various types of handoffs as listed below, each of which are used in different scenarios. It can be assumed to be an example of “make before break” as a standby connection is supposed to be present before the switch is done.It is also to be noted that a handoff may also be triggered when the number of subscribers in a particular cell has already reached the cell’s maximum limit, keeping the network safe from the threat of being congested and overloaded.Handoffs play a major role in allowing users to move across cells without the fear of being disconnected.One of the building blocks of cellular communication is mobility, which refers to providing users with the freedom of movement while they still are connected to the network.However, the signal from another (now closer) BS grows, and a handoff is imminent. The need for Handoff As the user (MS) moves away from the cell of one tower (BS), the signal strength of that BS reduces.

Cellular system in mobile communication ppt