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Packet core function and method of selecting packet data service node/foreign agent in packet data network

A technology of packet data service and packet data network, which is applied in the direction of network data management, selection device, radio/inductive link selection arrangement, etc., and can solve the problems of expensive and wasteful network resources, etc.

Inactive Publication Date: 2003-05-07
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since PPP resources are expensive for the operator, this is an expensive waste of network resources

Method used

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  • Packet core function and method of selecting packet data service node/foreign agent in packet data network
  • Packet core function and method of selecting packet data service node/foreign agent in packet data network
  • Packet core function and method of selecting packet data service node/foreign agent in packet data network

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Embodiment Construction

[0026] The method of the present invention is a simple selection process mainly performed in the radio network, and does not require the introduction of new nodes or new signaling in the core network to handle the functionality. In the selection process, if the PCF is acting as the host of an unexpired binding, it re-selects a PDSN with which it already has an R-P connection.

[0027] Three embodiments of the present invention are described here. In the first embodiment, the PCF serving the MN uses a simple hash function to initially select a PDSN and reselect the same PDSN after switching to another PCF from sleep. The second embodiment also uses a hash function for the initial selection of the PDSN, but provides an alternative method of reselecting the PDSN after switching between PCF / PDSN. After the initial selection of the PDSN and handover, the cache in the initial PCF retains the IP address of the PDSN and the mobile station identification (MSID) of the MN for a predetermine...

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Abstract

A packet Core Function (PCF(53, 75, 88, 89)) and method of consistently selecting a Packet Data Service Node (PDSN(54, 81, 90)) from a plurality of PDSNs in a packet data network to host a data session for a Mobile Node (MN(40)). In a first embodiment, a static lookup table (34) in the PCF (42, 44, 46) is used to associate a list of identifiers for MNs and a list of the plurality of PDSNs in the network. The PCF obtains an identifier for the MN and utilizes the lookup table and a hash function to associate the identifier for the MN with a PDSN. The PDSN is then selected by the PCF to host the data session for the MN. In another embodiment, the PCF also includes a cache timer (49) and a cache memory that stores the identifier for the MN and the IP address of the selected PDSN for a predetermined time period following the handoff of the MN to another PCF. If the MN returns to the PCF within the predetermined period of time, the PCF reselects the same PDSN to host the data session. In another embodiment, following the initial selection of a PDSN to host the data session, the IP address of the PDSN is sent to the MN which then passes the IP address of the PDSN to any subsequent PCFs where the MN roams. A PDSN zone ID may be utilized instead of the full IP address.

Description

[0001] Priority declaration under 35 U.S.C.§119(e) and 37 C.F.R.§1.78 [0002] This non-provisional application requires priority based on the prior U.S. provisional patent application named "Method for Selecting a PacketData Service Node / Foreign Agent in a Wireless Access" The provisional patent application was filed on March 10, 2000 in the name of Lila Madour, Louis Segura, Karim Shafik, John Barna and Jean-Charles Gonthier, and its application number is 60 / 188,529. Background of the invention [0003] Invention Technical Field [0004] The present invention relates to a radio telecommunication system, and more specifically, to a packet core function (PCF) and method for selecting a packet data service node (PSDN) / foreign agent (FA) in a packet data network. [0005] Related technology description [0006] Code Division Multiple Access (CDMA) 2000 is a third-generation system used in CDMA networks. It provides packet-switched call routing via a packet data service node (PDSN...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H04M15/00H04W8/06H04W36/12H04W48/18
CPCH04M2215/22H04M2215/7442H04M2215/34H04W48/18H04M2215/96H04M15/43H04W36/12H04W8/06H04M15/00H04M15/31H04M2215/204H04M2215/32H04M15/8038H04W36/36H04L45/54
Inventor L·马杜尔L·塞古拉K·沙菲克
Owner TELEFON AB LM ERICSSON (PUBL)
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