← Back to team overview

rohc team mailing list archive

Re: ROHC on a wireless link

 

Hello,
The reason I wanted to run it at the PHY or MAC layer is to avoid every incoming
Ethernet frames to be dent to all WDS associated AP's. Therefore, it sounds
better to add ROHC at the PHY or before the MAC layers. Currently we propose to
run B.A.T.M.A.N which only deals with the Ethernet frames. However it is not
efficient. As it is, the 802.11 frames gets encapsulated in the Ethernet frames.
In this process all the 4 address fields are used: sender/receiver of Ethernet
frames & sender/receiver of the WLAN frames.
As you have suggested that ROHC packets may be transmitted in replacement to the
IP packets....could you please elaborate on this ?
I am beginning to think it might be a lot more efficient to run a routing daemon
or use the iproute2 in the kernel mode to achieve this based on the address
fields. Then again, my thoughts are the processing would be too much task.
What do you think ?

Regards,
Abdul Hakeem


-----Original Message-----
From: rohc-bounces+alhakeem=gmail.com@xxxxxxxxxxxxxxxxxxx
[mailto:rohc-bounces+alhakeem=gmail.com@xxxxxxxxxxxxxxxxxxx] On Behalf Of Didier
Barvaux
Sent: Sunday, July 17, 2011 10:25 AM
To: rohc@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Rohc] ROHC on a wireless link

Hi,

> I was wondering if someone on the list could help in my
> implementation of ROHC on a wireless point to point link.
> Layer 2 bridge is implemented between the links, what I hope to
> achieve is to add the ROHC mechanism before or at the PHY or MAC
> layer. I look forward to your response.

I don't know how to integrate the ROHC mechanisms at the PHY or MAC
layers. However the ROHC packets may be easily transmitted above the MAC
layer in replacement to the IP packets.

For example, with 802.11 wireless links, simply use the Ethertype
dedicated to ROHC [1] in the Ethernet frame, then transmit the ROHC
packet in the Ethernet payload.

Why do you want to achieve that at the PHY or MAC layers ?

Regards,
Didier

[1] http://standards.ieee.org/develop/regauth/ethertype/eth.txt




Follow ups

References