Hi Harald, yeah, the hardware is layer0, then I will also implement L1 code in PC side. I have download osmo-bts source but I dont very understand the source architecture. can you introduce the architecture or if there is a design document. I need to know where should I implement my L1 code. and the interface with higher layer. On Mon, Sep 5, 2011 at 7:19 PM, Harald Welte <laforge@gnumonks.org> wrote:
Hi John,
On Mon, Sep 05, 2011 at 05:20:17PM +0800, John Wu wrote:
We are just planning on this project which use usb based sdr board and will be open design and source.
In that case, what do you plan to use as layer1? A simple SDR board only implements "Layer 0", but what about layer1?
osmo-bts and openbsc implement layers >= 2.
So what is your plan for L1 ?
sounds like sysmocom already working on this.
sysmocom is not building a USB based SDR, but a complete embedded BTS product (picocell). That's quite something different.
And while osmo-bts and openbsc are free software available in source code, the sysmoBTS L0 (hardware) and L1 (FPGA+DSP image) are not.
So by all means, don't be discouraged from building more hardware that interoperates with GSM related Free and Open Source software!
Regards, Harald -- - Harald Welte <laforge@gnumonks.org> http://laforge.gnumonks.org/
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