| 摘要 |
<p>PCT No. PCT/FI93/00322 Sec. 371 Date Apr. 15, 1994 Sec. 102(e) Date Apr. 15, 1994 PCT Filed Aug. 16, 1993 PCT Pub. No. WO94/05104 PCT Pub. Date Mar. 3, 1994An arrangement for enhancing data transmission in a digital cellular radio network, including a radio data terminal (A), a network terminating unit (IWF) connected to a mobile exchange (MSC) and including a data modem (MOD1), and a remote data modem (MOD2). The radio data terminal (A) and the remote data modem (MOD2) include features for providing data compression and decompression. The digital transmission connection between the radio data terminal (A) and the data modem (MOD1) is a non-transparent asynchronous data connection of a cellular radio system, over which compressed data is transmitted using the error correction of the cellular system. The error correction protocol of the remote modem is used for the transmission of compressed data over the modem connection between the data modem (MOD1) and the remote data modem (MOD2). At the beginning of a data session the data modem transmits compression parameters to the radio data terminal; these parameters are determined on the basis of a handshaking procedure between the data modem and the remote data modem.</p> |
