Addressing Race Handoff Conditions in Wireless Networks
A network and switching process technology, applied in wireless network protocol, wireless communication, electrical components, etc., can solve problems such as call failure
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[0020] figure 1 Schematically showing how IMS fits into the 3GPP cellular network architecture in the case of a packet service access network. Such as figure 1 As shown in , control of communication occurs at three layers (or planes). The lowest layer is the connectivity layer 1, also known as the bearer plane, and through which signals to / from user equipments (UEs) of the access network are steered. The entities within the connectivity layer 1 that connect IMS subscribers to IMS services form a network commonly referred to as the IP Connectivity Access Network IP-CAN (which in this case is the 3GPP Packet Services Access Network). The middle layer is the control layer 4 and on top is the application layer 6 .
[0021] The IMS 3 includes a core network 3a and a service network 3b operating through an intermediate control layer 4 and a connectivity layer 1 . The IMS core network 3a comprises: nodes at connectivity layer 1 that send signals to or receive signals from the 3GP...
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