Method of detecting a jamming transmitter affecting a communication user equipment

Communication user equipment configured to operate in a cellular network supporting uplink and downlink communication on one frequency band in a time-division manner, the cellular network comprising a plurality of base stations, including at least one active base station, on which the communication user equipment is camping,

• the communication user equipment is adapted to detect a jamming transmitter,
• the communication user equipment further comprising a channel detection unit, a measuring unit and an analyzing unit, wherein
• the channel detection unit being configured to detect that at least one downlink radio channel from the active base station is not decodable,
• the measuring unit being configured to measure signal levels received on said downlink radio channel for a plurality of time units,
• the analyzing unit being configured to:
• in response to the channel detection unit indicating that the downlink radio channel is not decodable
• analyze said signal level measurements measured by the measuring unit,
• the analyzing unit is further configured in case at least one time unit is detected with a signal level exceeding a predefined threshold, to detect a jamming transmitter by verifying a condition that, in a predefined amount of successive time units, a pattern of a first time unit with signal level exceeding the predefined threshold, directly followed by a second time unit with a signal level below the predefined threshold, is not detected.