Subject: [manet] QoS over shared media

From: "Yasser A. Lotfy" <[email-masked]>
Date: Tue, 09 Jul 2002 23:35:29 -0400

Good day,

In responce to Nilsson's e-mail, I can't help but think of QoS based on transimission over shared media. To make my point clear ckeck this simple example. Assume A, B, C, D, E, & F are nodes geographically positioned as drawn (just for simplicity). If A needs to transfer a high bandwidth stream to E via C, while B needs a low bandwidth transfer to F via D. It is possible to increase the share of link AC of the bandwidth (since link AC & BD share the same media).

A ====> C ====> E
B ----> D ----> F

The problem is that QoS solutions have always been implemented on IP layer. Implementing this kind of solution will require tight marriage with MAC layer. In addition, the dynamics of varying MAC resources based on the need seem to carry lots of difficulties.

My question is whether you can point me to any research done on that area? INSIGNIA, and FQMM (not quite sure about SWAN) they all work on IP layer without investigating this kind of otimization. Does Bluetooth, or 802.11b provide any mean to carry over such ideas?

Inputs are highly appreciated.

Yasser
Carleton University

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