RE: [manet] What is the difference between TDM and TDMA?

"Amoakoh Gyasi-Agyei" <a.gyasi-agyei@cqu.edu.au> Wed, 17 August 2005 23:44 UTC

Received: from localhost.localdomain ([127.0.0.1] helo=megatron.ietf.org) by megatron.ietf.org with esmtp (Exim 4.32) id 1E5XaW-00035z-7Z; Wed, 17 Aug 2005 19:44:52 -0400
Received: from odin.ietf.org ([132.151.1.176] helo=ietf.org) by megatron.ietf.org with esmtp (Exim 4.32) id 1E5XaU-000355-Ud for manet@megatron.ietf.org; Wed, 17 Aug 2005 19:44:51 -0400
Received: from ietf-mx.ietf.org (ietf-mx [132.151.6.1]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id TAA12667 for <manet@ietf.org>; Wed, 17 Aug 2005 19:44:47 -0400 (EDT)
Received: from mx2sophos.cqu.edu.au ([138.77.5.126]) by ietf-mx.ietf.org with esmtp (Exim 4.43) id 1E5YA7-0002ef-2u for manet@ietf.org; Wed, 17 Aug 2005 20:21:40 -0400
Received: from neutron.staff.ad.cqu.edu.au ([138.77.34.42] helo=ROKEMAIL.staff.ad.cqu.edu.au) by mx2sophos.cqu.edu.au with esmtp (Exim 4.44) id 1E5XaK-0004Mv-RU; Thu, 18 Aug 2005 09:44:40 +1000
X-MimeOLE: Produced By Microsoft Exchange V6.0.6603.0
content-class: urn:content-classes:message
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
Subject: RE: [manet] What is the difference between TDM and TDMA?
Date: Thu, 18 Aug 2005 09:35:22 +1000
Message-ID: <E924F679D556A345B865717377DCDFC404D0E2B4@ROKEMAIL.staff.ad.cqu.edu.au>
Thread-Topic: [manet] What is the difference between TDM and TDMA?
Thread-Index: AcWjdxprIvzo63HxTkqiQOzKD9bnHQACoHnAAACAQiA=
From: Amoakoh Gyasi-Agyei <a.gyasi-agyei@cqu.edu.au>
To: "Farrag, Osama" <Osama.Farrag@jhuapl.edu>, MANET Newsgroup <manet@ietf.org>
X-Spam-Score: 0.0 (/)
X-Scan-Signature: e8a67952aa972b528dd04570d58ad8fe
Content-Transfer-Encoding: quoted-printable
Cc:
X-BeenThere: manet@ietf.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Mobile Ad-hoc Networks <manet.ietf.org>
List-Unsubscribe: <https://www1.ietf.org/mailman/listinfo/manet>, <mailto:manet-request@ietf.org?subject=unsubscribe>
List-Post: <mailto:manet@ietf.org>
List-Help: <mailto:manet-request@ietf.org?subject=help>
List-Subscribe: <https://www1.ietf.org/mailman/listinfo/manet>, <mailto:manet-request@ietf.org?subject=subscribe>
Sender: manet-bounces@ietf.org
Errors-To: manet-bounces@ietf.org

Leon,

The main difference between tdm and tdma (also fdm/fdma, etc) is that
with tdm (also fdm, etc.) the signals multiplexed (i.e. sharing a
resource) come from the same node, whereas for tdma (also fdm, etc.) the
signals multiplexed come from different sources/transmitters. This is
the reason why we use tdm for downlink (forward link) and tdma for
uplink (reverse link).

Cheers,
Amoakoh

-----Original Message-----
From: manet-bounces@ietf.org [mailto:manet-bounces@ietf.org] On Behalf
Of Farrag, Osama
Sent: Thursday, August 18, 2005 9:16 AM
To: MANET Newsgroup
Subject: RE: [manet] What is the difference between TDM and TDMA?

Leon,

- Time Division Multiplexing (TDM) imply partitioning the bandwidth of
the channel connecting two nodes into finite set of time slots. 

- Time Division multiple Access (TDMA) imply partitioning the bandwidth
of a channel shared by many nodes, typically an infrastructure node and
several mobile nodes, where each node gets to access its dedicated time
slot. 

Hope this helps
Osama Farrag

-----Original Message-----
From: manet-bounces@ietf.org [mailto:manet-bounces@ietf.org] On Behalf
Of Leon Martin
Sent: Wednesday, August 17, 2005 5:59 PM
To: MANET Newsgroup
Subject: [manet] What is the difference between TDM and TDMA?

See the title for the question.

Thanks.

- Leon


		
____________________________________________________
Start your day with Yahoo! - make it your home page
http://www.yahoo.com/r/hs 
 

_______________________________________________
manet mailing list
manet@ietf.org
https://www1.ietf.org/mailman/listinfo/manet

_______________________________________________
manet mailing list
manet@ietf.org
https://www1.ietf.org/mailman/listinfo/manet



_______________________________________________
manet mailing list
manet@ietf.org
https://www1.ietf.org/mailman/listinfo/manet