FIELD: communications engineering.
SUBSTANCE: proposed device and method are used for voice frame/ data frame transmission in mobile communication system supporting ALL-IP network.Mobile phone sends heading information using synchronization frame and then separately transfers voice frame only; communication center B detects heading information in synchronization frame received, memorizes detected heading information, and upon receiving voice frame adds heading information to voice frame and transfers voice frame with added headings to base network.
EFFECT: provision for preventing addition of headings to traffics in mobile communication line.
39 cl, 7 dwg
