A method for determining a delay time between two wireless communication entities (12, 16), the method comprising the following steps: - Synchronizing a global navigation satellite system clock of a global navigation satellite system unit with a global navigation satellite system master clock, wherein a first time stamp device, having said global navigation satellite system unit, a first payload data interface unit as well as a second payload data interface unit, is connected to a first wireless communication entity such that said global navigation satellite system unit is allocated to said first wireless communication entity; - Synchronizing said global navigation satellite system clock with a hardware clock in said first payload data interface unit by using a clock synchronization protocol; - Synchronizing a global navigation satellite system clock of a global navigation satellite system unit with a global navigation satellite system master clock, wherein a second time stamp device, having said global navigation satellite system unit, a first payload data interface unit as well as a second payload data interface unit, is connected to a second communication entity such that said global navigation satellite system unit is allocated to said second wireless communication entity; - Synchronizing said global navigation satellite system clock with a hardware clock in said first payload data interface unit by using a clock synchronization protocol; - Routing in said first time stamp device at least one data packet relating to payload data from said second payload data interface unit to said first payload data interface unit; - Providing a first time stamp of said data packet by using said hardware clock when processed by said first time stamp device, thereby hardware time stamping of said data packet, wherein the timing information is stamped into the data packet; - Transmitting said data packet by means of said first wireless communication entity; - Receiving said data packet by means of said second wireless communication entity; - Providing a second time stamp by using said second time stamp device allocated to a receiving side, thereby hardware time stamping of said data packet processed by said second time stamp device, wherein said second time stamp relates to said data packet while being processed by said second time stamp device; and - Comparing said first and said second time stamps with each other, wherein a processing and propagation delay time is determined based on the result of said comparison. - Synchronizing a global navigation satellite system clock of a global navigation satellite system unit with a global navigation satellite system master clock, wherein a first time stamp device, having said global navigation satellite system unit, a first payload data interface unit as well as a second payload data interface unit, is connected to a first wireless communication entity such that said global navigation satellite system unit is allocated to said first wireless communication entity; - Synchronizing said global navigation satellite system clock with a hardware clock in said first payload data interface unit by using a clock synchronization protocol; - Synchronizing a global navigation satellite system clock of a global navigation satellite system unit with a global navigation satellite system master clock, wherein a second time stamp device, having said global navigation satellite system unit, a first payload data interface unit as well as a second payload data interface unit, is connected to a second communication entity such that said global navigation satellite system unit is allocated to said second wireless communication entity; - Synchronizing said global navigation satellite system clock with a hardware clock in said first payload data interface unit by using a clock synchronization protocol; - Routing in said first time stamp device at least one data packet relating to payload data from said second payload data interface unit to said first payload data interface unit; - Providing a first time stamp of said data packet by using said hardware clock when processed by said first time stamp device, thereby hardware time stamping of said data packet, wherein the timing information is stamped into the data packet; - Transmitting said data packet by means of said first wireless communication entity; - Receiving said data packet by means of said second wireless communication entity; - Providing a second time stamp by using said second time stamp device allocated to a receiving side, thereby hardware time stamping of said data packet processed by said second time stamp device, wherein said second time stamp relates to said data packet while being processed by said second time stamp device; and - Comparing said first and said second time stamps with each other, wherein a processing and propagation delay time is determined based on the result of said comparison.