Abstract: Method and apparatus of data transmission in a cellular communication system which can increase the efficiency of the information signal transmission in the downlink and, thus, maximize the information signal reception quality at the mobile station. The solution can also reduce the feedback channel (from mobile to base station) load. The apparatus operates along with the base station and provides M diversity groups of transmission channels, each group having K transmission channels.

Abstract: A latch for securing the cover to the housing of a network interface device including a shaft having a bayonet-type projection at its tail end rotatable to lock with one of two tabs fabricated as part of the housing, and with a stop projection at its opposite end to capture the shaft within the cover. In a preferred embodiment of the invention, the housing, the cover, the tabs and the shaft are all constructed of a substantially plastic composition, and with a controlled rotation of ±90° from the quiescent insertion of the shaft for locking and unlocking the network interface device in allowing for automated manufacture and assembly of the interface device in telephone and data equipment test accessing port.