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Can anyone explain about Soft Handoff? hameznick 19-April-2008 02:14:59 PMComments www.freepatentsonline.com/7394790.html Posted by crouse doi.wiley.com/10.1002/0470048298.ch3 Posted by crouse Go to Wikipedia...... Posted by waqqas1 soft hand is used in CDMA and WCDMA telecom system softhand :- first in make the connection to the other sectors than brack the call from use sectors is softhand off Posted by satpal Friends also read from http://wireless.stanford.edu/papers/DWongsoftHandoff.pdf Posted by jzhang Soft handoff is so called to distinguish it from the more traditional hard handoff process. With hard handoff, a definite decision is made on whether to handoff or not. On a positive decision, the handoff is initiated and executed without the user attempting to have simultaneous traffic1 channel communication with the two base stations 2. With soft handoff, a conditional decision is made on whether to hand off. Depending on the changes in pilot signal strength from the two or more base stations involved, a hard decision will eventually be made to communicate with only one. This normally happens after it is clear that the signal from one base station is considerably stronger than those from the others. In the interim period, the user has simultaneous traffic channel communication with all candidate base stations. The difference between hard and soft handoffs is like the difference between swimming relay events and track-and-field relay events. In swimming relays, the next swimmer starts just as the preceding one touches the wall, analogous to the switch from one base station to another in a hard handoff. In track-and field relays, the baton is passed from one runner to the next after the second runner starts running, and so for a short time they are both running together, analogous to a soft handoff. Posted by Charlie_ng Soft handover or soft handoff refers to a feature used by the CDMA and WCDMA standards, where a cell phone is simultaneously connected to two or more cells (or cell sectors) during a call. If the sectors are from the same physical cell site (a sectorised site), it is referred to as softer handoff. This technique is a form of mobile-assisted handover, for IS-95/CDMA2000 CDMA cell phones continuously make power measurements of a list of neighboring cell sites, and determine whether or not to request or end soft handover with the cell sectors on the list. Posted by sagitraz |
Posted: 20-April-2008 07:52:20 AM By: sagitraz Soft handover or soft handoff refers to a feature used by the CDMA and WCDMA standards, where a cell phone is simultaneously connected to two or more cells (or cell sectors) during a call. If the sectors are from the same physical cell site (a sectorised site), it is referred to as softer handoff. This technique is a form of mobile-assisted handover, for IS-95/CDMA2000 CDMA cell phones continuously make power measurements of a list of neighboring cell sites, and determine whether or not to request or end soft handover with the cell sectors on the list. | |
Posted: 21-April-2008 12:57:00 PM By: Charlie_ng Soft handoff is so called to distinguish it from the more traditional hard handoff process. With hard handoff, a definite decision is made on whether to handoff or not. On a positive decision, the handoff is initiated and executed without the user attempting to have simultaneous traffic1 channel communication with the two base stations 2. With soft handoff, a conditional decision is made on whether to hand off. Depending on the changes in pilot signal strength from the two or more base stations involved, a hard decision will eventually be made to communicate with only one. This normally happens after it is clear that the signal from one base station is considerably stronger than those from the others. In the interim period, the user has simultaneous traffic channel communication with all candidate base stations. The difference between hard and soft handoffs is like the difference between swimming relay events and track-and-field relay events. In swimming relays, the next swimmer starts just as the preceding one touches the wall, analogous to the switch from one base station to another in a hard handoff. In track-and field relays, the baton is passed from one runner to the next after the second runner starts running, and so for a short time they are both running together, analogous to a soft handoff. | |
Posted: 21-April-2008 12:58:57 PM By: jzhang Friends also read from http://wireless.stanford.edu/papers/DWongsoftHandoff.pdf | |
Posted: 29-December-2008 05:46:21 AM By: satpal soft hand is used in CDMA and WCDMA telecom system softhand :- first in make the connection to the other sectors than brack the call from use sectors is softhand off | |
Posted: 31-December-2008 12:36:32 PM By: waqqas1 Go to Wikipedia...... | |
Posted: 07-September-2009 02:27:20 PM By: crouse doi.wiley.com/10.1002/0470048298.ch3 | |
Posted: 07-September-2009 02:34:37 PM By: crouse www.freepatentsonline.com/7394790.html |