US 11,917,023 B2
Fast session restoration for latency sensitive middleboxes
Mate Imre Nagy, Budapest (HU); Dietmar Fiedler, Kirkkonummi (FI); Péter Mátray, Budapest (HU); Dániel Géhberger, Montréal (CA); Gábor Németh, Budapest (HU); and Balázs Pinczel, Budapest (HU)
Assigned to TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
Appl. No. 17/293,984
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Nov. 21, 2019, PCT No. PCT/IB2019/060031
§ 371(c)(1), (2) Date May 14, 2021,
PCT Pub. No. WO2020/104988, PCT Pub. Date May 28, 2020.
Claims priority of provisional application 62/779,313, filed on Dec. 13, 2018.
Claims priority of provisional application 62/770,550, filed on Nov. 21, 2018.
Prior Publication US 2022/0124159 A1, Apr. 21, 2022
Int. Cl. H04L 67/148 (2022.01); H04L 41/0654 (2022.01); H04L 67/1095 (2022.01); H04L 67/1097 (2022.01); H04L 67/142 (2022.01); H04L 67/146 (2022.01); H04L 67/145 (2022.01)
CPC H04L 67/148 (2013.01) [H04L 41/0654 (2013.01); H04L 67/1095 (2013.01); H04L 67/1097 (2013.01); H04L 67/142 (2013.01); H04L 67/145 (2013.01); H04L 67/146 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method implemented by a redundancy controller for providing protection for a session managed by a network node in a telecommunications network, the network node implemented by a hierarchy of service layers including a media plane layer and a control plane layer that manages media sessions, the method comprising:
generating, a layer-specific descriptor for at least the control plane layer, each layer-specific descriptor representing a state of a respective service layer for an active session;
storing the layer-specific descriptor for at least the control plane layer in an external database; and
restoring, responsive to a loss of the active session, the states of the control plane layer and media plane layer for the lost session based on the stored layer-specific descriptors.