Method of detecting a loss of service availability, in particular a jamming transmitter and/or an out of service situation, affecting a communication user equipment, user equipment and evaluation unit with interfaces to the user equipment

摘要

The invention relates to a method of detecting a jamming transmitter affecting a communication user equipment, wherein said communication user equipment (UE) and a number of base node stations (BNS) are components of a cellular code division multiple access (CDMA) based radio network (RN), wherein a communication signal unit (SU) is correlated with a pseudonoise spread code (SC) in a serving cell coverage area (CA) of a serving base node station (sBNS) and transmitted as a pseudonoise chip (CHI) in a multiple shared communication frequency channel spectrally located between an upper frequency and a lower frequency of a communication frequency band (FB I-XIX) and the pseudonoise spread code (SC) is received by the communication user equipment (UE) as a serving pseudonoise spread code (sSC) from said serving base node station (BNS) in a serving downlink channel (sCPICH).

主权项

1. A method of detecting a loss of service availability, in particular detecting a jamming transmitter and/or an out of service situation, affecting a communication user equipment, wherein said communication user equipment and a number of base node stations are components of a cellular code division multiple access based radio network adapted for transmitting a signal comprising multiple communication signal units between the communication user equipment and a serving base node station, in particular in a frequency division duplex or time division duplex mode, wherein: a communication signal unit is correlated with a pseudonoise spread code in a serving cell coverage area of the serving base node station and transmitted as a pseudonoise chip in a multiple shared communication frequency channel spectrally located between an upper frequency and a lower frequency of a communication frequency band and comprising the steps of: measuring a set of power parameters at a first earlier time and at a second later time, the power parameters comprising a channel biased parameter significant for the received power at the communication user equipment antenna connector, an unbiased received wide band power within the bandwidth of the communication user equipment receiver at the communication user equipment antenna connector; and —verifying the conditions, (a) that as compared to the first earlier time the biased parameter is not or less detectable at the second later time, and (b) that the unbiased parameter has increased at the second later time as compared to the first earlier time it is indicated, that a jamming transmitter is affecting a communication user equipment, and/or that the unbiased parameter has decreased at the second later time as compared to the first earlier time it is indicated, that an out of service situation is affecting a communication user equipment.