Meaning – The term logical channel, refers to a sending channel and a receiving channel that together are used to send and receive data over a data link at the same time. Several logical channels can be established on the same data link by interleaving the transmission of packets.
GSM needs to transmit a large amount of signaling information apart from the payload data. These different types of data are transmitted via several logical channels. The name stems from the fact that each of the data types is transmitted on specific timeslots that are parts of physical channels.
Example of usage – “Logical channel means just a part of unique information meant for a unique user or a group of users. All these logical pieces of information require a carrierfrequency to be transmitted.”