| 摘要 |
The invention relates to communications systems, and especially to real-time data (two-party or multi-party) communication in communications systems. A real-time data item is sent from a sending terminal to a number of receiving terminals over a communication system. In accordance with the present invention, each receiving user terminal acknowledges the reception of the item by sending an item acknowledgement report after the end of the item. The acknowledgement report may be sent after a successful reception of the item, unsuccessful reception of the item or in both cases.
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