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Re: [Openbts-discuss] SWLOOPBACK mode in OpenBTS2.8
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From: Akibsayyed <aki...@gm...> - 2012-04-15 10:05:46
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Hello partul Concept you are talking is completely new for list people. could you please foucus more on this. Laying fibre network is not feasible in rural area but in urban area. Still i doubt on part processing baseband stack on cloud part. Please focus more on this. Akib Sayyed Matrix Shell Mob +91-966-514-2243 Sent from Android Parul Gupta <par...@gm...> wrote: Thanks for your response David. Let me give you some background on what I am trying to do. We are trying to simulated a "Cloud RAN scenario" which has lately been seeing a lot of interest in operators and equipment providers (China mobile, ALU, NSN, IBM are all talking about this new architecture with different names). The basic idea is to run all the Baseband processing of a wireless stack (PHY MAC and upwards) in a centralized "cloud"-like platform and connect this to remote radio heads via fiber. Besides OpenBTS GSM stack, we have some other technology stacks (wimax, LTE) and I want to simulate a scenario how many such virtual BS can fit on to a server from a compute and memory requirements standpoint. The next step would be to test with I/O. This is why I need the SWLOOPBACK mode - to test only the compute part of multiple OpenBTS instances running with multiple instances of other technology BS. Now if the SWLOOPBACK feature is outdated, would there be quick alternate to do this? If not, and if I were to start coding this feature, would it be straight-forward or involve massive rewriting of the code? Any pointers would be very helpful. Thanks much in advance! Parul On Fri, Apr 13, 2012 at 10:04 PM, David Burgess <da...@ra...> wrote: Parul - I'm surprised you got loopback to work in 2.6. It was originally put in there to support unit testing of some of the channel components. We have not supported it for a while and were planning to remove it. -- David On Apr 13, 2012, at 3:29 AM, Parul Gupta wrote: > Dear all, > > I am new to the list and also somewhat new to OpenBTS 2.8, but excited :) > > Does anyone know if the SWLOOPBACK functionality is tested and > supported in 2.8? It is supposed to be a feature for loopback > testing/debugging without any hardware and I have used it in OpenBTS > 2.6 without any problems. But for v2.8, when I compiled with this flag > defined in Transceiver52M/USRPDevice.h and > TransceiverRAD1/RAD1Device.h, I got some compilation errors (in > RAD1Device.cpp, RAD1ping.cpp). I was able to fix these easily, but it > seems to question whether SWLOOPBACK is supported in this release. > Also, after fixing these errors, when I run OpenBTS, it seems to hang > after printing "Starting the system..." > > I also couldn't find anything on it in the User Manual > (SoftwareP2.8Manual.pdf) that came with the code. > > Thanks very much in advance > Parul > David A. Burgess, CEO Range Networks, Inc. San Francisco cell +1 707 208 2622 ____________________________________________ Cellular networks made simple and affordable. http://www.rangenetworks.com ____________________________________________ -- Knowledge sharing and collaboration for social welfare - http://ngopost.org/ http://twitter.com/ngopost |