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Re: [STDS-802-16] regarding service flow in 802.16

Title:

Hi,will Lee

Thanks for your prompt reply…your reply was very useful.

But still I have some doubts; I will list it below,

1. I don't understand the concept of classifier priority (they say it takes value from 0 to 255).

2. In 802.16 specification, address based rules define how data packet of different users are mapped to different service flows (your previous reply also states the same). This shows the Convergence sub layer should maintain the mapping information between upper protocols defined address.

a. So this will force the 802.16 CS to implement some upper layer functions???

b. Whenever there is a change in upper layer protocol, the change should be updated in MAC CS, this makes MAC CS non-generic???



Plz clear my doubt.



Thanks & regard
 subodh kumar







On 8/30/06, Will Lee <will.lee@cosmobic.com> wrote:
Hi,
 
It depends on the implementation of MAC_packet_CS.
 
For example, the stream is: IPv4->UDP->RTP
 
1. Classifier:
Source Address + Destination Address +   Protocol + Type of Service
If any packet matches the classifier,  the packet can be classified to the
SF and CID. But if Source  Port  or Destination Port is different, the MAC_packet_CS
can apply a DSC_REQ to request a Qos change.
 
 
2. Classifier:
Source Address + Destination Address +   Protocol + Type of Service
Source  Port   + Destination Port 

3. Classifier:
Source Address + Destination Address +   Protocol + Type of Service +
Source  Port   + Destination Port +
synchronization source (SSRC) identifier + contributing source (CSRC) identifiers
In the case, each session can apply a SFID and CID. It is rather tricky.
 
----- Original Message -----
Sent: Tuesday, August 29, 2006 10:25 PM
Subject: [STDS-802-16] regarding service flow in 802.16

hi all,

I had read in some doc as stating below

"An 802.16 system should not be forced to open a different CID for each upper layer protocol if packets for upper layer protocols have the same QoS requirements (802.16 scheduling service types)"

So it means if a SS has multiple RTPS connection with same Qos parameters then is it all RTPS connections have same transport CID and SFID??



Plz clear my doubt???

Thanks in advance
subodh kumar