在最近召开的HAR2009会展上，Harald Welte向参展人员展示了一种“开源GSM网络”系统的图片，原理和安装方法，并称这种开源网络符合荷兰当地法律。这种GSM网络的核心由两台BTS收 发器基站组成，每台收发器传送的功率可达100mw，可以直接绑在树上工作。而这两台基站则由基站控制器BSC进行控制。  

在Harald Welte展示的开源GSM网络上，使用的是基于Linux的服务器负责基站控制器的功能，称为OpenBSC。系统通过短信形式向用户发送授权信息，总共可授权391名用户。目前研究者们正在积极测试这种开源GSM网络的硬件设备和软件功能。
 

slashdot
 

Mobile: Open Source GSM Network At Dutch Hacker Convention

communications networking solevita writes
"Harald Welte, who's been interviewed previously by Slashdot, has written on his blog about operating an Open Source GSM network at the recent HAR2009 conference. Photographs and a description and of the setup, run under license of the Dutch regulatory authority, are provided; essentially the setup consisted of a pair of BTS' (Base Transceiver Stations) running at 100mW transmit power each and tied to a tree. In turn these provided access to the Base Station Controller (BSC), in this case a Linux server in a tent running OpenBSC. The system authenticated users with a token sent via SMS; in total 391 users subscribed to the service and were able to use their phones as if they were on any other network. Independent researchers are increasingly examining GSM networks and equipment, Welte's work proves that GSM is in the realm of the hackers now and that this realm of mobile networking could be set for a few surprises in the future."