[Asterisk-Users] iax2 wireless and Multicast

[Francisco Pérez Botella]

Hi.

I'm proposing a wireless distribution system in infraestructure mode for a 
valley with no cables and distant houses, respect to Asterisk, I can get a 
company I work with to provide me with E1 and use LCR to get 4 different 
telcos based on prefix.

I've been reading a very interesting paper about voip on wireless, i recommend 
it really

http://wwwcsif.cs.ucdavis.edu/~wangw/VoIP_ISCC_CameraReady.pdf

Second is more Radio spectrum oriented but its worth reading
http://wwwcsif.cs.ucdavis.edu/~wangw/VTC_Final2.pdf

I will have to manage From asterisk to clients IP-phones, so biefly the idea 
is to multiplex voip flows in large packets and multicast them from 
asterisk/AP to client stations. flows from client stations to asterisk 
gateway go unicast. I wonder how iax2 protocol will be good for multiplex 
(trunk) and multicast ??

Can I treat all client stations as diferent peers with the same multicast 
address (group address) or maybe like a one peer (with multicast address) and 
then configure same peer in all client stations and define users at the same 
client station to let know them what flow is for who ???

Second challenge is client stations transmit voice flows binding unicast IP I 
guess defining unicast asterisk IP address (acting like a gateway) will work, 
but... what about transmitting bettween client sattions ???

a liitle draw for explanation
                                                                |---------|
                                            /---<unicast<-|client-st|
                                          /                    /_______|
        |------------|        |-----|                   /       |-----------|
-------|*iax2trunk|------|AP   |->multicast-trunk->|client-st2|
	|_________|       |____|<unicast-st2-\---<-|________| 
                                           \                   \                     
                                             \                   |----------|
                                               \--<unicast<|client-st3|
                                                                  |_______|

Do I need an entire asterisk system on client stations to demultiplex and 
extract the flow they need or merely a small version with protocol 
libraries ??

Of course I will employ a pseudo TDM on AP like frottle and priorization 
queues on all nodes

Do you think is this possible ??

please comment about... has anybody with some experience on this ?

Regards

-- 
Francisco J. Pérez Botella