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/ ============================================================================ "Privacy in residential applications is a desirable marketing option." (ETSI EN 300 175-7 Ch. A6)