Patent ID: 6970436

Claim:
In a communication system including a base transceiver station and a base station controller controlling the base transceiver station, an apparatus for monitoring asynchronous transfer mode cells in a communication system comprising: a receive interface part established in the base station controller, the receive interface part recording a cell to be monitored in a storage part by checking latched VPI/VCI of asynchronous transfer mode cells received from the base transceiver station by the base station controller, the receive interface part counting and recording a number of error occurrences by checking header errors of the cells; and a transmission interface part established in the base station controller, the transmission interface part transferring a test cell produced for checking a cell transmission time between the base transceiver station and the base station controller, wherein the receive interface part includes: a first storage part storing the cell to be monitored temporarily; a second storage part outputting a data corresponding to the latched VPI/VCI of the cell; a third storage part outputting a VPI index value of an address designated by the data outputted from the second storage part; and a fourth storage part storing the number of error occurrence of the cell at the other address designated by the VPI index value.