Method for improving the handing over a connection from one SGSN to another SGSN
AssigneeTelefonaktiebolaget LM Ericsson
InventorsKnut Bakke, Bjorn Holen
Life of this patent
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Abstract
A method and system (i) for improving the handing over of a connection from one SGSN (I) to another, i.e. when an MS (Mobile Station) moves from one SGSN service area to another, (ii) for not interrupting the packet transmission and possible layer 3 procedures, and (iii) for optimizing the network utilization without adding complexity to SGSN. Upon an inter SGSN routing area update, the old SGSN (I) is given the role as a temporary anchor, whereas the other (new) SGSN (II) is temporarily working as a serving SGSN.
Claims26
A method for handing over of a connection from a first serving GPRS support node (SGSN) to a second SGSN in response to an inter SGSN routing area update, the method comprising the steps of:
- operating the first SGSN as a temporary anchor in response to the inter SGSN routing area update;
- and
- redirecting signaling traffic to and from the second SGSN via the first SGSN while the first SGSN is operating as the temporary anchor.
A system for handing over of a connection between at least two GPRS nodes in response to an inter SGSN routing area update, the system comprising:
- a first SGSN operating as a temporary anchor in response to the inter SGSN routing area update;
- and
- a second SGSN in communication with the first SGSN, the first SGSN redirecting signaling traffic to and from the second SGSN via the first SGSN while the first SGSN is operating as the temporary anchor.
A method for handing over of a connection between GPRS support nodes (SGSN), the method comprising the steps of:
- receiving a routing update;
- forming a temporary leg between an old and a new SGSN after receiving the routing update;
- and
- redirecting signaling traffic across the temporary leg.
Dependencies are inferred from the claim text.