TDMA - Revision history

.FUF: Reverted edits by Jeansonsale (talk) to last revision by Clrorick

2011-08-20T07:35:22Z

Reverted edits by Jeansonsale (talk) to last revision by Clrorick

Jeansonsale: /* Usage */

2011-08-16T01:12:04Z

‎Usage

Clrorick: /* How it works */

2009-05-09T21:25:05Z

‎How it works

Clrorick: /* Features */

2009-05-09T21:21:45Z

‎Features

Clrorick at 20:07, 9 May 2009

2009-05-09T20:07:02Z

Clrorick at 20:06, 9 May 2009

2009-05-09T20:06:48Z

Clrorick at 20:04, 9 May 2009

2009-05-09T20:04:54Z

Clrorick at 21:40, 5 May 2009

2009-05-05T21:40:11Z

Clrorick at 21:39, 5 May 2009

2009-05-05T21:39:20Z

HweY9k at 17:54, 11 April 2007

2007-04-11T17:54:44Z

@@ Line 1: / Line 1: @@
 '''Time Division Multiple Access (TDMA)''' is a digital communication channel allowing many users to access a single communication channel.
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+==Usage==
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+TDMA is used in the largest available networks in the world.    TDMA is aimed at dealing with multiple access to the same communication medium.  Each individual user is given a unique time slot within the defined communication channel.  This methodology increases the efficiency of transmission by allowing multiple users simultaneous access to a time slot.  TDMA can be easily adapted to transmission of data as well as voice communication.
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 ==Features==

@@ Line 1: / Line 1: @@
 '''Time Division Multiple Access (TDMA)''' is a digital communication channel allowing many users to access a single communication channel.
-==Usage==
+design of ring that may 		http://huahua0801.webs.com	jewelry for example belt
-TDMA is used in the largest available networks in the world.    TDMA is aimed at dealing with multiple access to the same communication medium.  Each individual user is given a unique time slot within the defined communication channel.  This methodology increases the efficiency of transmission by allowing multiple users simultaneous access to a time slot.  TDMA can be easily adapted to transmission of data as well as voice communication.
+possibly be put on for an 		http://wuwu85.blogspot.com/	buckles are not just a
 ==Features==

@@ Line 7: / Line 7: @@
 TDMA offers the ability to carry date rates of 64 kbps to 120 MBPS, which enables options of communication such as fax, voiceband data, sms, as well as bandwidth intensive apps.  TDMA allows the mobile device to have extended battery life, since the cellular device is only transmitting a portion of the time during sessions.  In addition, TDMA is the most cost effective technology for upgrading an analog system to digital [http://www.iec.org/online/tutorials/tdma/topic04.html].  TDMA also enables some vital features for system operation in an advanced cellular or PCS environment.
-==How it works==
+==How It Works==
-It’s necessary for TDMA to rely upon that fact that the audio signal has been digitized.  These signals are divided into a number of milliseconds and distributed into time slots.  TDMA is also the access technique used in the European digital cellular standard, GSM, and the Japanese digital standard, personal digital cellular (PDC).  A single channel can carry all four conversations if each conversation is divided into relatively short fragments, is assigned a time slot, and is transmitted in synchronized timed.  For instance, if there are four people: Jan, Tom, Bill, and Bob making calls, each would be assigned a time slot on a single channel.  However, if Bob was no longer using his phone, his time slot would still be used, wasting bandwidth.  (http://www.iec.org/online/tutorials/tdma/topic04.html).
+It’s necessary for TDMA to rely upon that fact that the audio signal has been digitized.  These signals are divided into a number of milliseconds and distributed into time slots.  TDMA is also the access technique used in the European digital cellular standard, GSM, and the Japanese digital standard, personal digital cellular (PDC).  A single channel can carry all four conversations if each conversation is divided into relatively short fragments, is assigned a time slot, and is transmitted in synchronized timed.  For instance, if there are four people: Jan, Tom, Bill, and Bob making calls, each would be assigned a time slot on a single channel.  However, if Bob was no longer using his phone, his time slot would still be used, wasting bandwidth.  [http://www.iec.org/online/tutorials/tdma/topic04.html].

@@ Line 5: / Line 5: @@
 ==Features==
-TDMA offers the ability to carry date rates of 64 kbps to 120 MBPS, which enables options of communication such as fax, voiceband data, sms, as well as bandwidth intensive apps.  TDMA allows the mobile device to have extended battery life, since the cellular device is only transmitting a portion of the time during sessions.  In addition, TDMA is the most cost effective technology for upgrading an analog system to digital (http://www.iec.org/online/tutorials/tdma/topic04.html).  TDMA also enables some vital features for system operation in an advanced cellular or PCS environment.
+TDMA offers the ability to carry date rates of 64 kbps to 120 MBPS, which enables options of communication such as fax, voiceband data, sms, as well as bandwidth intensive apps.  TDMA allows the mobile device to have extended battery life, since the cellular device is only transmitting a portion of the time during sessions.  In addition, TDMA is the most cost effective technology for upgrading an analog system to digital [http://www.iec.org/online/tutorials/tdma/topic04.html].  TDMA also enables some vital features for system operation in an advanced cellular or PCS environment.
 ==How it works==
 It’s necessary for TDMA to rely upon that fact that the audio signal has been digitized.  These signals are divided into a number of milliseconds and distributed into time slots.  TDMA is also the access technique used in the European digital cellular standard, GSM, and the Japanese digital standard, personal digital cellular (PDC).  A single channel can carry all four conversations if each conversation is divided into relatively short fragments, is assigned a time slot, and is transmitted in synchronized timed.  For instance, if there are four people: Jan, Tom, Bill, and Bob making calls, each would be assigned a time slot on a single channel.  However, if Bob was no longer using his phone, his time slot would still be used, wasting bandwidth.  (http://www.iec.org/online/tutorials/tdma/topic04.html).

@@ Line 6: / Line 6: @@
 ==Features==
 TDMA offers the ability to carry date rates of 64 kbps to 120 MBPS, which enables options of communication such as fax, voiceband data, sms, as well as bandwidth intensive apps.  TDMA allows the mobile device to have extended battery life, since the cellular device is only transmitting a portion of the time during sessions.  In addition, TDMA is the most cost effective technology for upgrading an analog system to digital (http://www.iec.org/online/tutorials/tdma/topic04.html).  TDMA also enables some vital features for system operation in an advanced cellular or PCS environment.
 ==How it works==
 It’s necessary for TDMA to rely upon that fact that the audio signal has been digitized.  These signals are divided into a number of milliseconds and distributed into time slots.  TDMA is also the access technique used in the European digital cellular standard, GSM, and the Japanese digital standard, personal digital cellular (PDC).  A single channel can carry all four conversations if each conversation is divided into relatively short fragments, is assigned a time slot, and is transmitted in synchronized timed.  For instance, if there are four people: Jan, Tom, Bill, and Bob making calls, each would be assigned a time slot on a single channel.  However, if Bob was no longer using his phone, his time slot would still be used, wasting bandwidth.  (http://www.iec.org/online/tutorials/tdma/topic04.html).

← Older revision		Revision as of 20:06, 9 May 2009
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−	~~{{Wikify}}~~
−
	'''Time Division Multiple Access (TDMA)''' is a digital communication channel allowing many users to access a single communication channel.		'''Time Division Multiple Access (TDMA)''' is a digital communication channel allowing many users to access a single communication channel.

← Older revision		Revision as of 21:39, 5 May 2009
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	{{Wikify}}		{{Wikify}}

−	'''~~TDMA -~~ Time Division Multiple Access'''	+	'''Time Division Multiple Access (TDMA)'''

@@ Line 13: / Line 13: @@
 It’s necessary for TDMA to rely upon that fact that the audio signal has been digitized.  These signals are divided into a number of milliseconds and distributed into time slots.  TDMA is also the access technique used in the European digital cellular standard, GSM, and the Japanese digital standard, personal digital cellular (PDC).  A single channel can carry all four conversations if each conversation is divided into relatively short fragments, is assigned a time slot, and is transmitted in synchronized timed.  For instance, if there are four people: Jan, Tom, Bill, and Bob making calls, each would be assigned a time slot on a single channel.  However, if Bob was no longer using his phone, his time slot would still be used, wasting bandwidth.  (http://www.iec.org/online/tutorials/tdma/topic04.html).
-==Pros & Cons==
+==Pros
-−
-===Pros===
-−
-ETDMA fixes the problem TDMA causes with wasting timeslots. ETDMA dynamically assigned time slots on an as needed basis (http://mobilex.sourceforge.net/art1/index4.html).
-The data is sent through pauses which normal speech contains.  If the subscriber has something they would like to transmit, it is placed as one bit in the buffer queue.  The system then scans the buffer and notices the user has something to transmit, allocating the bandwidth accordingly.  However, if there is nothing to transmit, it goes to the next subscriber.  This well proven multiple access technique can be 10 times more efficient as analog transmission of TDMA (http://www.iec.org/online/tutorials/tdma/topic04.html).
-−
-TDMA is better for international plans and debately has better battery life.
-−
-[[CDMA]] is can be considered more secure, due to the fact it encodes data ( http://www.cdmauniversity.com/ProdTech/cdma/training/cdma25/m5/m5p02.html).
-−
-[[CDMA]] claims it has better battery life and coverage, however, Cingular, in the US, is the largest TDMA carrier.
-−
-===Cons===
-−
-TDMA can be wasteful of bandwidth because time slots are allocated to specific conversations whether or not anyone was speaking at the given moment.
-−
-CDMA is not typically used for international plans.
-−
-TDMA has lower aggregate throughput than [[CDMA]] (http://www.hpl.hp.com/personal/Jean_Tourrilhes/Linux/Linux.Wireless.mac.html).
-−
-==Cell Phone Providers==
-−
-There are several cell phone companies competing to sell their phones and advertise their network coverage area.  They will primarily be competing within two categories:  TDMA and [[CDMA]].  The pros and cons of TDMA have been mentioned, and the companies that offer TDMA are the following:  Cingular, Nextel, T-Mobile.  The companies that support [[CDMA]] are:  Verizon, sprint, quest, virgin, Alltel.  More companies support [[CDMA]]in the US, but for the majority of cellular providers world wide, this is not the case, more companies are supporting [[CDMA]] (http://www.cellphoneinfo.com/index.html).
-−
-==TDMA Vs. [[CDMA]]==
-−
-[[CDMA]] was introduced in 1989, and the wireless world has been in debate over merits of TDMA and [[CDMA]].  Those who are for [[CDMA]] have claimed that its technology has bandwidth efficiency of up to 13 times that of TDMA and between 20 to 40 times that of analog transmission.  Those who favor TDMA point out that there has been no successful major trial of [[CDMA]] technology that supports the capacities it claims.  Not to mention, theoretical improvements in bandwidth efficiency claimed [[CDMA]] is now being approached by enhancements to TDMA technology.  TDMA's evolution allows capacity increases of 20 to 40 fold over analog in the near future.  [[CDMA]] is a very expensive technology that needs $300,000 per base station, compared to $80,000 for TDMA.  Lastly, TDMA is the proven leader as the most economical digital migration path for existing AMPS networks.  No one has the final word in this debate, however, it is evident that TDMA will remain the dominant technology in the wireless market (http://www.iec.org/online/tutorials/tdma/topic04.html).
-−
-== External Links ==
-−
-http://en.wikipedia.org/wiki/Time_division_multiple_access <br>
-http://www.iec.org/online/tutorials/tdma/topic04.html <br>
-http://www.cellphoneinfo.com/index.html <br>
-http://mobilex.sourceforge.net/art1/index4.html <br>
-http://www.cdmauniversity.com/ProdTech/cdma/training/cdma25/m5/m5p02.html
-http://www.hpl.hp.com/personal/Jean_Tourrilhes/Linux/Linux.Wireless.mac.html