Читать книгу Mobile Communications Systems Development - Rajib Taid - Страница 109

To reduce the exchange of signaling messages overhead between mobile devices and the network over the air interface or other interface, sometimes a signaling message is attached to another signaling message that is being scheduled and already transmitted. Such a mechanism of attaching a signaling message as part of another signaling message is known as the piggybacking of a message. The piggybacked message may be used to request additional RRs from the network to start data transfer in the opposite direction or to trigger the start of a new signaling procedure between the mobile device and the network. The following Examples 4.5 to 4.7 shall clarify the concept and purpose of piggybacking a signaling message into another message.

 Air Interface Signaling Messages