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kashkanantambu · 11-22-2005, 11:42 PM

Why is important for the downlink to be balanced with the uplink?

Jay2TheRescue · 11-23-2005, 12:38 PM

Could you elaborate a bit more? I'm not sure if you are asking a physics or a technology question. (Or both??)

hillbilly44 · 11-23-2005, 3:35 PM

The reason for downlink & uplink to be balanced is you want the receive & transmit signal levels to be as close to the same as possible. You definitely want the uplink (from the mobile) to be as good (if not better) although some systems are downlink limited. Hope this helps

Jay2TheRescue · 11-23-2005, 4:18 PM

Quote:

Originally Posted by hillbilly44

The reason for downlink & uplink to be balanced is you want the receive & transmit signal levels to be as close to the same as possible. You definitely want the uplink (from the mobile) to be as good (if not better) although some systems are downlink limited. Hope this helps

That sounds good. I wasn't quite sure if that was what they were asking. Thanks! Jay

kashkanantambu · 11-23-2005, 6:02 PM

Quote:

Originally Posted by Jay2TheRescue

Could you elaborate a bit more? I'm not sure if you are asking a physics or a technology question. (Or both??)

It is a technology question. Specifically cellular systems.

To put another way,

If the down link is 174 dBm, then the uplink should be 174 dB - why is this crucial?

Thanks.

hillbilly44 · 11-23-2005, 8:01 PM

Quote:

Originally Posted by kashkanantambu

It is a technology question. Specifically cellular systems.

To put another way,

If the down link is 174 dBm, then the uplink should be 174 dB - why is this crucial?

Thanks.

Because you want the downlink to match to uplink of the mobile. In other words if the site is transmitting a signal at -90db then you want the recieve path to be the same to enable the mobile to process the call. if you have a -10db difference then it is more difficult for the base station to complete the call from the mobile.

bobolito · 11-28-2005, 5:16 PM

To put it in plain English, a phone call is a two-way call. Therefore, it must be balanced in both directions in order for your voice to reach the network as well as the other person's voice to reach your handset. If one of the links is not equal to the other you can have all kinds of side effects, such as the person can hear you but you can't hear them and so on. So it is important the system works equally well under all conditions, near or far from the base station or inside a basement, through concrete walls, etc. so that when you hear the voice of the other person is starting to break up you automatically know that your voice is also likely to break up in their end as well.

11-22-2005, 11:42 PM	#1
kashkanantambu Junior Member Join Date: Oct 2005 Location: Georgia Posts: 97 Phone(s): Palm Treo 700w Provider(s): Verizon Wireless Thanks: 0 Thanked 0 Times in 0 Posts My Auctions	Antennas Why is important for the downlink to be balanced with the uplink?

11-23-2005, 12:38 PM	#2
Jay2TheRescue Drycleaner extraordinaire Join Date: Dec 2002 Location: Sterling, Virginia Posts: 11,149 Phone(s): V3, HTC Tilt, HTC Pure, Moto V551, iPAQ 6515, Western Electric 302, 500, Ericsson Ericaphone Provider(s): AT&Tingular 310-410 Devices: Zune 30gb & way too many BT devices to list Thanks: 52 Thanked 43 Times in 41 Posts Images: 157	Re: Antennas Could you elaborate a bit more? I'm not sure if you are asking a physics or a technology question. (Or both??) __________________ GET A FREE $25 AT&T GIFTCARD WITH ACTIVATION OF NEW AT&T SERVICE FROM ANY DEALER. PM ME FOR DETAILS

11-23-2005, 3:35 PM	#3
hillbilly44 Join Date: Mar 2003 Posts: 713 Thanks: 0 Thanked 0 Times in 0 Posts	Re: Antennas The reason for downlink & uplink to be balanced is you want the receive & transmit signal levels to be as close to the same as possible. You definitely want the uplink (from the mobile) to be as good (if not better) although some systems are downlink limited. Hope this helps

11-28-2005, 5:16 PM	#7
bobolito iPhone 3G 16GB (White) Join Date: May 2002 Location: in front of my computer Posts: 12,575 Phone(s): iPhone 3G, Sierra 875 3G Aircard Provider(s): AT&T Mobility Devices: WiFi cards/Access points Thanks: 3 Thanked 17 Times in 14 Posts Images: 50 My Auctions	Re: Antennas To put it in plain English, a phone call is a two-way call. Therefore, it must be balanced in both directions in order for your voice to reach the network as well as the other person's voice to reach your handset. If one of the links is not equal to the other you can have all kinds of side effects, such as the person can hear you but you can't hear them and so on. So it is important the system works equally well under all conditions, near or far from the base station or inside a basement, through concrete walls, etc. so that when you hear the voice of the other person is starting to break up you automatically know that your voice is also likely to break up in their end as well. __________________

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