sniffs
Well-known member
- Dec 3, 2009
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I think you're mistaken on this ..at&t is the one that. Doesn't. Have true 3g coverage ..everyone knows their network runs off of wifi signals primarily..their. 3g is minimal and spotty. Why do you think people complain so much about loss if signal? Where as Verizon atually has the best coverage out there..it always beats out all other carriers every year come reviews time..can't do that. W/O a TRUE 3G network..
I've never ever heard that a cellular network runs on wifi signals.
Where'd you get your info from?
I'm pretty knowledgable about cellular networks and can even break it down for you spec by spec, connection by connection and I've never heard it uses WIFI.
The reason you lose signal is because GSM handoff's are what's called a "hard handoff".
CDMA networks, you're almost always connecting to 3 towers and their handoff's are called "soft handoffs". During a hard handoff, you're basically being thrown randomly to another tower where the connection get's iffy.. during this time, you may experience a dropped call.
http://en.wikipedia.org/wiki/Handover
A hard handover is one in which the channel in the source cell is released and only then the channel in the target cell is engaged. Thus the connection to the source is broken before the connection to the target is made—for this reason such handovers are also known as break-before-make. Hard handovers are intended to be instantaneous in order to minimize the disruption to the call. A hard handover is perceived by network engineers as an event during the call.
A soft handover is one in which the channel in the source cell is retained and used for a while in parallel with the channel in the target cell. In this case the connection to the target is established before the connection to the source is broken, hence this handovers is called make-before-break. The interval, during which the two connections are used in parallel, may be brief or substantial. For this reason the soft handovers is perceived by network engineers as a state of the call, rather than a brief event. Soft handovers may involve using connections to more than two cells, e.g. connections to three, four or more cells can be maintained by one phone at the same time. When a call is in a state of soft handovers the signal of the best of all used channels can be utilised for the call at a given moment or all the signals can be combined to produce a clearer copy of the signal. The latter is more advantageous, and when such combining is performed both in the downlink (forward link) and the uplink (reverse link) the handover is termed as softer. Softer handovers are possible when the cells involved in the handovers have a single cell site .