公开(公告)号：US20230396673A1

公开(公告)日：2023-12-07

申请号：US18033998

申请日：2020-10-29

Applicant: Telefonaktiebolaget LM Ericsson (PUBL)

Inventor： Balazs Pinczel ,  Dániel Géhberger ,  Pêter Mátray ,  Gábor Németh ,  Mate Imre Nagy

IPC: H04L67/1095

CPC classification number: H04L67/1095

Abstract: According to an aspect there is provided a computer-implemented method of operating a leader server in a leader server-follower server log replication configuration. The method comprises (i) storing (801) a current master state of a system and maintaining a master log relating to the current master state, wherein the master log comprises a plurality of log entries each having a respective log index, wherein each log entry indicates a respective change to the master state of the system; (ii) performing (803) a log compaction procedure to remove from the master log any log entry for which the respective change to the master state of the system has been overridden by a change to the master state in a subsequent log entry; (iii) storing (805) a compaction index that is the highest log index of the log entries removed in the log compaction procedure; (iv) storing (807) an override index that is the highest log index of the log entries for which the respective change to the master state overrode a change to the master state by an earlier log entry; and (v) sending (809) the compaction index and the override index to one or more follower servers that are to store a replica of the master log relating to the current master state.

公开(公告)号：US20220124159A1

公开(公告)日：2022-04-21

申请号：US17293984

申请日：2019-11-21

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Mate Imre Nagy ,  Dietmar Fiedler ,  Péter Mátray ,  Dániel Géhberger ,  Gábor Németh ,  Balázs Pinczel

IPC: H04L67/142 ,  H04L67/146 ,  H04L67/148 ,  H04L67/1095 ,  H04L67/145

Abstract: Methods and apparatus for fast session restoration of user sessions in a network node are suitable for latency sensitive applications. The fast session restoration techniques take advantage of the layered architecture of a network node and stores layer-specific descriptors that describe the states of corresponding service layers of a network node for an active session. When a failure of the network nodes occurs, the descriptors are used to achieve a seamless and fast session restoration.

公开(公告)号：US11917023B2

公开(公告)日：2024-02-27

申请号：US17293984

申请日：2019-11-21

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Mate Imre Nagy ,  Dietmar Fiedler ,  Péter Mátray ,  Dániel Géhberger ,  Gábor Németh ,  Balázs Pinczel

IPC: H04L67/148 ,  H04L41/0654 ,  H04L67/1095 ,  H04L67/1097 ,  H04L67/142 ,  H04L67/146 ,  H04L67/145

CPC classification number: H04L67/148 ,  H04L41/0654 ,  H04L67/1095 ,  H04L67/1097 ,  H04L67/142 ,  H04L67/145 ,  H04L67/146

Abstract: Methods and apparatus for fast session restoration of user sessions in a network node are suitable for latency sensitive applications. The fast session restoration techniques take advantage of the layered architecture of a network node and stores layer-specific descriptors that describe the states of corresponding service layers of a network node for an active session. When a failure of the network nodes occurs, the descriptors are used to achieve a seamless and fast session restoration.

公开(公告)号：US20220006868A1

公开(公告)日：2022-01-06

申请号：US17295645

申请日：2019-11-21

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： András Császár ,  Péter Mátray ,  Dániel Géhberger ,  Gábor Németh ,  Balázs Pinczel ,  Mate Imre Nagy ,  Dietmar Fiedler

IPC: H04L29/08 ,  H04L12/24

Abstract: Fail-over protection is provided for a server cluster including a plurality of primary nodes supporting user sessions and a standby node. When the standby node determines that a primary node in a cluster has failed, the standby node configures its network interface to use an Internet Protocol (IP) address of the failed primary node. The standby node further retrieves session data for user sessions supported by the failed primary node from a low latency database for the cluster and restores the user sessions at the standby node. When the user sessions are restored, the standby node switches from a standby mode to an active mode.