The invention relates to a system for transmitting packet data in the air interface of a digital cellular system based on TDMA, Time Division Multiple Access. The mobile terminated logical channels comprise information channels designated for transmitting information and control channels, which can be...http://www.google.com.au/patents/US5640395?utm_source=gb-gplus-sharePatent US5640395 - System for transmitting packet data in digital cellular time division multiple access (TDMA) air interface
