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Re: [Discuss-gnuradio] updated packet format on USRP inband signaling
From: |
Eric Blossom |
Subject: |
Re: [Discuss-gnuradio] updated packet format on USRP inband signaling |
Date: |
Sun, 25 Feb 2007 17:07:29 -0800 |
User-agent: |
Mutt/1.5.9i |
On Sun, Feb 25, 2007 at 07:29:01PM -0500, Brian Padalino wrote:
> Some preliminary questions:
>
> How are the operations linked with the transmit sequences?
I'm not sure I understand this question.
> Are operations sent down in bulk, or one at a time?
You can send as many as will fit in the payload.
Unless you doing something like hopping, I suspect that command
packets are relatively infrequent.
> Will the RX chain simply start and return 504-byte length packets
> until the next TX timestamp is sent down?
I think this depends on how everything is configured. I think you'll
have to do something (set some register) to enable the Rx at all.
Likewise for Tx. As to how the Rx and Tx interact, I think that's
still to be worked out. The right answer may depend on the
application.
E.g., a half-duplex "push to talk" radio (simplex or trunked) would
probably run the Rx all the time, except when it was transmitting.
A packet based radio may run some power measurement / RSSI code in the
FPGA and only return Rx data when it wasn't transmitting and the power
exceeded some threshold.
> Could this starve the USB bandwidth?
Only if the sum total of IN + OUT is > 32MB/s
Eric
- [Discuss-gnuradio] updated packet format on USRP inband signaling, Eric Blossom, 2007/02/25
- Re: [Discuss-gnuradio] updated packet format on USRP inband signaling, Brian Padalino, 2007/02/25
- Re: [Discuss-gnuradio] updated packet format on USRP inband signaling,
Eric Blossom <=
- Re: [Discuss-gnuradio] updated packet format on USRP inband signaling, Brian Padalino, 2007/02/25
- Re: [Discuss-gnuradio] updated packet format on USRP inband signaling, Eric Blossom, 2007/02/25
- Re: [Discuss-gnuradio] updated packet format on USRP inband signaling, Eric Blossom, 2007/02/25
- Message not available
- Re: [Discuss-gnuradio] updated packet format on USRP inband signaling, Eric Blossom, 2007/02/25
- Re: [Discuss-gnuradio] updated packet format on USRP inband signaling, Brian Padalino, 2007/02/25
- Re: [Discuss-gnuradio] updated packet format on USRP inband signaling, Eric Blossom, 2007/02/25
- Re: [Discuss-gnuradio] updated packet format on USRP inband signaling, Brian Padalino, 2007/02/25
- Re: [Discuss-gnuradio] updated packet format on USRP inband signaling, Eric Blossom, 2007/02/25
- Re: [Discuss-gnuradio] updated packet format on USRP inband signaling, Brian Padalino, 2007/02/25
- Message not available
- Re: [Discuss-gnuradio] updated packet format on USRP inband signaling, Eric Blossom, 2007/02/26