Patent ID: 9451457
Filing Date: 2016-09-20
CPC Classification: H04L,H04W

Claim Text:
1. A method for enhancing high availability in a secure telecommunications network, the telecommunications network comprising a plurality of remote nodes, one or a plurality of further network nodes in communication with the plurality of remote nodes, and at least one security gateway, the method comprising: operating, during normal operation of the at least one security gateway, each of the plurality of remote nodes in a first operational mode, wherein in the first operational mode, each of the plurality of remote nodes communicates with the one or the plurality of further network nodes through the at least one security gateway via a secure communication tunnel; switching, in response to failure of the secure communications tunnel, from the first operational mode to a second operational mode for at least one specific remote node of the plurality of remote nodes based on an exchange of at least a first message and a second message between at least one specific remote node and the one or the plurality of further network nodes using Dynamic Host Configuration Protocol (DHCP), wherein the first message comprises a request from the at least one specific remote node and the second message comprises an answer to the first message by a network management node, the second message comprising a one-time password, and wherein the first message is sent in response to verifying the following conditions: operating, during failure of the secure communication tunnel, the at least one specific remote node in the second operational mode by connecting the at least one specific remote node to the one or the plurality of further network nodes by bypassing the at least one security gateway; wherein the at least one specific remote node and the one or the plurality of further network nodes are controlled by the telecommunications network's operator; wherein the first message is sent from the at least one specific remote node after a predetermined first time interval (T