"报文分组通信" can be translated into English as "packet communication" or "packet-switched communication".
"Packet communication" emphasizes the communication method that uses packets (报文分组) as the basic unit for data transmission.
"Packet-switched communication" further specifies that this communication occurs over a packet-switched network, where data is divided into packets and transmitted independently.
Both terms are commonly used in the field of telecommunications and networking.