Method for redirecting packet data traffic to an alternative access point/router
First Claim
1. A method of protecting a data link (1-10, 1-20) established via an access point (GGSN1, GGSN2, ROUTER1, ROUTER2) to a mobile subscriber node (MN), characterized by the following steps:
- (i) a monitoring network element (HA) monitors the operation of the data link (1-10, 1-20);
(ii) in case the operation of the data link (1-10, 1-20) becomes unsuitable for communication, the monitoring network element (HA) starts to set up an alternative data link (1-10, 1-20) via an alternative access point (GGSN1, GGSN2, ROUTER1, ROUTER2); and
(iii) after the alternative data link has been set up, the mobile subscriber node (MN) completes a Mobile IP handover to it.
2 Assignments
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Accused Products
Abstract
The invention relates to a method of protecting a data link (1-10, 1-20) established via an access point (GGSN1, GGSN2, ROUTER1, ROUTER2) to a mobile subscriber node (MN). The invention further includes the steps in which: (i) a monitoring network element (HA) observes the operation of the data link (1-10, 1-20); and (ii) in case the operation of the data link (1-10, 1-20) becomes unsuitable for communication, the monitoring network element (HA) starts to set up an alternative data link (1-10, 1-20) via an alternative access point (GGSN1, GGSN2, ROUTER1, ROUTER2).
65 Citations
28 Claims
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1. A method of protecting a data link (1-10, 1-20) established via an access point (GGSN1, GGSN2, ROUTER1, ROUTER2) to a mobile subscriber node (MN), characterized by the following steps:
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(i) a monitoring network element (HA) monitors the operation of the data link (1-10, 1-20);
(ii) in case the operation of the data link (1-10, 1-20) becomes unsuitable for communication, the monitoring network element (HA) starts to set up an alternative data link (1-10, 1-20) via an alternative access point (GGSN1, GGSN2, ROUTER1, ROUTER2); and
(iii) after the alternative data link has been set up, the mobile subscriber node (MN) completes a Mobile IP handover to it. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A network element (HA) monitoring the Internet data link of a mobile node, characterized in that
(i) the monitoring network element (HA) is arranged to observe the operation of a data link (1-10, 1-20) (ii) in case the operation of the data link (1-10, 1-20) becomes unsuitable for communication, the monitoring network element (HA) starts to set up an alternative data link (1-10, 1-20) via an alternative access point (GGSN1, GGSN2, ROUTER1, ROUTER2).
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24. An access network comprising at least one centralized router or gateway (GGSN1, GGSN2, ROUTER1, ROUTER2) via which an IP data link.
(1-10, 1-20) is set up from an outside data network to a mobile subscriber node (MN), characterized in that said router or gateway is arranged to send state data associated with the link to an outside network element that monitors the operation of the router or gateway to protect said IP data link, and said router or gateway is responsive to a set-up request that is sent by said network element and comprises data on a data link that was set up via another router or gateway to a mobile node but failed, for setting up an IP data link from said router or gateway to said mobile node on the basis of said received data.
Specification