[hpsdr] Hermes BBmesh??

[John Laur]

It uses UDP, yes, but the protocol includes a sequence number. At the
current time I do not believe the software or FPGA firmware attempts
to resequence OOP, so practically there will be problems; of course
once you get a couple of hops away you lack both the bandwidth and the
latency to run the protocol anyway, so the routing and out of order
packets will be the absolute least important concern.

If you do want to run over a topology like this you would be better
served using ghpsdr3-alex and a client like qtradio.

On Sat, May 30, 2015 at 4:07 PM, George Byrkit <ghbyrkit at chartermi.net> wrote:
> But then, doesn't its (Metis, Hermes, OpenHPSDR Ethernet protocol) use of UDP rather than
> TCP mostly preclude any proper sequencing of packets (either way) by the protocol stack,
> thus meaning that a mesh network with ever-changing routing is not suitable.  Wi-Fi is of
> course not the same as a mesh network...  There are many different kinds of 'wireless
> networks', each with its own topology and issues.
>
> 73,
> George K9TRV
>
> -----Original Message-----
> From: Hpsdr [mailto:hpsdr-bounces at lists.openhpsdr.org] On Behalf Of John Laur
> Sent: Saturday, May 30, 2015 4:59 PM
> To: John; HPSDR list
> Subject: Re: [hpsdr] Hermes BBmesh??
>
> ***** High Performance Software Defined Radio Discussion List *****
>
> It does not perform that well over wireless networks. A mesh network
> would be likely even worse. If you want to try it, run the sample rate
> as low as you can (48000, limit to 1 receiver). This will give you the
> maximum amount of network receive buffer time in Hermes. You will have
> to keep the round trip time solidly < 5ms. You will probably also need
> to use 802.11n or 802.11ac equipment. You may also need to use a
> static IP; discovery broadcast packets are not going to route properly
> on the mesh.
>
> Other than those requirements (which are quite steep) I might expect
> that it would technically work, and there is nothing in the protocol
> that would preclude its use. While I was previously worried that the
> FPGA firmware does not support routing, it turns out that it's 'speak
> only when spoken to' nature should actually do the right thing.
>
> 73, John K5IT
>
> On Fri, May 29, 2015 at 7:59 PM, John <radio at mediacombb.net> wrote:
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>>
>>
>> Has anyone tried to run Hermes with OpenHPSDR using Broadband-Hamnet??
>>
>> John WoGN
>>
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