Re: Inexpensive Huawei GSM Picocells

12.02.2021 dátummal, 19:40 időpontban Harald Welte <laforge(a)gnumonks.org> írta: On Fri, Feb 12, 2021 at 05:45:45PM +0100, Saturn Rocket wrote: Well, the fact that Huawei calls their Macro BTS 3900 and the Pico 3900B doesn't really mean they have anything in common, except the branding. I would typically be very surprised if a lot of similarity in terms of code / system architecture is found between femto/picocells and the large macro cells. However, the Abis protocol dialect will more likely be the same, as a vendor doesn't want to rewrite the BSC just because a new BTS model is released. Based on what I read about the 3900B, I think it will be very hard to support it. Contrary to all the other vendors / BTSs we've worked with, there doesn't really seem to be a real LMT for it (LMT means Local Maintenance Terminal). That LMT is what you connect via UART or Ethernet to the BTS in order to configure it. Ericsson calls it OMT. For Huawei, there's also a "LMT", but it actually connects over IP to the BSC (!) and then accesses the BTS over the Backhaul from the BSC side. I guess they didn't really understand the "Local" part? The actual BTS software is then also installed from the BSC. So without having the BSC, It will definitely be much harder to even configure such a BTS. Nokia/Siemens/Ericsson/ip.access are definitely simpler that way (not listing osmobts based BTSs here, as they obviously are easiest to set up). -- - Harald Welte <laforge(a)gnumonks.org> http://laforge.gnumonks.org/ ============================================================================ "Privacy in residential applications is a desirable marketing option." (ETSI EN 300 175-7 Ch. A6)