Automatic detection and modification of channel usage in TDMA wireless communication networks

摘要

A mobile switching center switches telephone calls in a time division multiplex access wireless communications network architecture. A communications controller in the mobile switching center is adapted to control communications between the mobile switching center and at least one base station controller. An interworking function in the mobile switching center is adapted to transfer information between the mobile switching center and another network other than the wireless communications network. A compact data services unit (CDSU) causes said mobile switching center to automatically detect, whenever a downgrade procedure occurs during a data call switched through said mobile switching center, the subchannels of the telephone call dropped in the downgrade procedure network.