FIELD: methods and devices for broadcast or multi-address transmission.
SUBSTANCE: receiver receives notification signals about IP-sessions from ground-based system for broadcasting digital video data. Each notification about IP-session (RM) contains information, related to notification at next lower level, and also information, identifying amount of notification data, such as number of notification messages and allocation of waiting time. Quantitative data are reported to receiver, how many messages (from X1 to X3) it is supposed to receive, before it receives all relevant notification messages. Waiting time value informs receiver, how long it may wait, before receiving messages from X1 to X3 again, which may have altered content. After original receipt of messages, receiver may be in inactive state (E), or may receive notification messages from another channel Y(D).
EFFECT: saving of resources of radio receiver and power.
5 cl, 7 dwg
