There are a lot of different standards in Telecommunication area, which based on patents created, by telecom corporations.
For example, there is a technology LTE - standard for high-speed wireless communication, patents of it certain parts belongs to various telecom companies, such as Ericsson, Nokia, Motorola.
Usually, they form a consortium, supported by the International Telecommunication Union(ITU), which publishes standards and specifications for these technologies. So when you use the LTE hardware as third party, you pay royalties to this consortium. Money then distributed, depending on the patents, between corporations.
Lets consider abstract situation: I am implementing software, not the hardware method, which is implementation of standard, such as LTE base station module in Haskell(programming language) and publishing it under the GPL.
Will it be infringement of the patents associated with standard, or not?
How OSS projects like openBTS, who implemented GSM standard in C++ and published it under GPL licence, do note face problems of infringement?