WO2009132704A1 - Système de station de base intérieure - Google Patents

Système de station de base intérieure Download PDF

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Publication number
WO2009132704A1
WO2009132704A1 PCT/EP2008/055305 EP2008055305W WO2009132704A1 WO 2009132704 A1 WO2009132704 A1 WO 2009132704A1 EP 2008055305 W EP2008055305 W EP 2008055305W WO 2009132704 A1 WO2009132704 A1 WO 2009132704A1
Authority
WO
WIPO (PCT)
Prior art keywords
anchor point
base station
data packet
tunnel
indoor base
Prior art date
Application number
PCT/EP2008/055305
Other languages
English (en)
Inventor
Hans-Åke LUND
Ulf JÖNSSON
Original Assignee
Telefonaktiebolaget Lm Ericsson (Publ)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Telefonaktiebolaget Lm Ericsson (Publ) filed Critical Telefonaktiebolaget Lm Ericsson (Publ)
Priority to PCT/EP2008/055305 priority Critical patent/WO2009132704A1/fr
Publication of WO2009132704A1 publication Critical patent/WO2009132704A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems
    • H04W84/045—Public Land Mobile systems, e.g. cellular systems using private Base Stations, e.g. femto Base Stations, home Node B
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/04—Interfaces between hierarchically different network devices
    • H04W92/12—Interfaces between hierarchically different network devices between access points and access point controllers

Definitions

  • An indoor base station system An indoor base station system
  • the present invention relates to an indoor base station system, comprising an indoor base station, an external anchor point and an external connection, the indoor base station being connected to the external anchor point via the external connection, the external anchor point being arranged for routing data packet traffic to and from certain services provided and the external connection being arranged for routing data packet traffic to and from broadband services, the system being arranged to set up a direct connection, a tunnel, between the indoor base station and the external anchor point.
  • the present invention also relates to a method for forwarding data packet traffic messages from an indoor base station and an anchor point.
  • a Femto cell base station is thus a small local radio base-station that normally is placed in residential or small business environments, supporting a relatively small number of users.
  • a Femto cell base station enhances in- house coverage and lowers the radio network resource requirements on ordinary radio base stations, and is especially useful where access would otherwise be limited or unavailable.
  • DSL Digital Subscriber Line
  • a Femto cell base station may for example use any one of the known networks/standards GSM (Global System for Mobile communications), WCDMA (Wideband Code Division Multiple Access) or LTE (Long Term Evolution) for the radio technology.
  • GSM Global System for Mobile communications
  • WCDMA Wideband Code Division Multiple Access
  • LTE Long Term Evolution
  • a central anchor-point such as a node of the type GGSN (Gateway GPRS (General Packet Radio Service) Support Node) or a PDN- GW (Packet Data Network Gateway) before it is forwarded to the different services that a user wants to access.
  • GGSN General Packet Radio Service
  • PDN- GW Packet Data Network Gateway
  • node The type of node used depends on which radio technology that is used. For existing solutions, all traffic to and from connected Femto cell base stations is routed via the anchor point, the GGSN or PDN-GW, which means that high bandwidth broadband traffic always has to pass the anchor point. This of course constitutes a problem, since the anchor point's capacity will be a limiting factor for all the Femto cell base station traffic. Furthermore, this means that the traffic is transmitted an unnecessarily long route, which results in unnecessarily high transmission costs.
  • the object of the present invention is to provide an indoor base station system, where the traffic load on anchor points is reduced, relieving anchor points of traffic load and reducing transmission costs.
  • an indoor base station system comprising an indoor base station, an external anchor point and an external connection.
  • the indoor base station is connected to the external anchor point via the external connection, where the external anchor point is arranged for routing data packet traffic to and from certain services provided.
  • the external connection is arranged for routing data packet traffic to and from broadband services.
  • the system is arranged to set up a direct connection, a tunnel, between the indoor base station and the external anchor point.
  • the method comprises the steps: - Determining if a data packet traffic message should be forwarded to an external anchor point, used for routing data packet traffic to and from certain services provided, or to an external connection, used for routing data packet traffic to and from broadband services.
  • an anchor point in an indoor base station system which system further comprises an indoor base station, and an external connection.
  • the indoor base station is connected to the external anchor point via the external connection, the external anchor point being arranged for routing data packet traffic to and from certain services provided and the external connection being arranged for routing data packet traffic to and from broadband services.
  • the system is arranged to set up a direct connection, a tunnel, between the indoor base station and the external anchor point. Only data packet traffic that is desired to be handled by the anchor point is forwarded via the tunnel, and all other data packet traffic is handled by the external connection, the forwarding being determined by means of forwarding policies which are transmitted from the anchor point to the indoor base station via a tunnel.
  • the indoor base station comprises a router arrangement for routing outgoing data packet traffic either to the external connection or to the anchor point.
  • the forwarding policies comprise a list of Internet protocol, IP, addresses, which IP addresses determine which data packet traffic that should be forwarded to the anchor point .
  • a data packet traffic message that is intended to be forwarded to the anchor point via a tunnel is equipped with a certain IP tunnel head.
  • the router arrangement may be arranged for adding said IP tunnel head to a data packet traffic message that is intended to be forwarded to the anchor point.
  • the forwarding policies are transmitted from the anchor point to the indoor base station via a tunnel, for example a Gateway Tunnel Protocol, GTP, tunnel, where the GTP then is extended in order to carry out the present invention.
  • a tunnel for example a Gateway Tunnel Protocol, GTP, tunnel, where the GTP then is extended in order to carry out the present invention.
  • GTP Gateway Tunnel Protocol
  • broadband user traffic between a device at home and the external services may be routed directly via an external connection, and not via a central anchor point, enabling a user to obtain a faster service.
  • the anchor point may be relieved of those traffic messages that do not have to pass via the anchor point.
  • Figure 2a shows a first type of traffic message
  • Figure 2b shows a second type of traffic message
  • Figure 3 shows a flowchart for a method according to the present invention.
  • a Femto cell base station is shown, being placed indoors.
  • the Femto cell base station 1 is connected to a broadband connection 2 via a residential gateway 3, such as a broadband modem.
  • a mobile phone 4 and a computer 5 are shown as examples of equipment that may communicate via the Femto cell base station 1.
  • the Femto cell base station 1 When connected, the Femto cell base station 1 will, with normal 3GPP (3rd Generation Partnership Project) standardized methods, set-up a GTP (GPRS) (GPRS).
  • 3GPP 3rd Generation Partnership Project
  • Tunneling Protocol tunnel connection 6 to a GGSN or Serving/PDN-GW i.e. an anchor point 7.
  • the tunnel passes an access and backbone network 8, comprising the nearest internet connection point 9 in the operator's network.
  • This connection point 9 is commonly called Access Edge Router.
  • the Access Edge Router 9 is normally used for connecting the broadband user to his or hers ordinary broadband services, such as the Internet 10, via an ordinary connection 1 1 a, 1 1 b.
  • the ordinary connection 11 a to the Access Edge Router 9 and the tunnel connection 6 seems to be physically different in Figure 1 , but between the residential gateway 3 and the Access Edge Router they are constituted by one and the same physical connection, and are drawn separately in order to increase the comprehension of the present invention.
  • tunnel connection 6 hereafter referred to as tunnel
  • the traffic between the Femto cell base station 1 and the anchor point 7 will pass directly between them, only passing via the Access Edge Router 9.
  • the anchor point 7 routes traffic to and from certain services provided, such as TV 7a, web-servers 7b etc.
  • the forwarding policies in the Femto cell base station 1 will be controlled by the anchor point 7 such that only traffic that is desired to be handled by the anchor point 7 is forwarded via the tunnel 6.
  • traffic for example Internet traffic, which need not pass the anchor point 7, will not be transmitted via the tunnel 6; instead it is transmitted directly to the Internet 10 via the Access Edge Router 9.
  • broadband traffic such as Internet traffic, will not have to pass via an anchor point 7 at all, relieving the anchor point 7 of that burden, thus increasing system capacity and reducing transmission costs.
  • traffic relating to services which an anchor point operator charges is directed to and from the anchor point 7 directly, via the Access Edge Router 9, by means of the tunnel 6. All other traffic is directed to and from the Access Edge Router 9 for further connection to other services 10, 12, such as the Internet 10.
  • the traffic is bi-directional during a so-called session when it has been set up, i.e. when the initial traffic has been directed to the anchor point 7 or the Access Edge Router 9, the following traffic in the session is bi-directional.
  • a session thus relates to traffic associated with the initial traffic, setting up the session. When the session ends, a new session will have to be set up, using the directing procedure according to the present invention.
  • IP Internet Protocol
  • a first type of a traffic message 13, in the form of a packet, which does not use a tunnel 6, comprises an IP head 14 and data 15, where the IP head 14 determines the destination of the data 15.
  • a traffic message 13 does thus not reach an anchor point 7.
  • a second type of a traffic message 16 which does use a tunnel 6, comprises an IP head 17, similar to the one described with reference to Figure 2a, an IP tunnel head 18 and data 19.
  • the Femto cell base station 1 suitably comprises a router arrangement 20 for routing an outgoing message either to the Access Edge Router 9 directly to other services 10, 12 or to the anchor point 7.
  • the router arrangement 20 adds an IP tunnel head 18 to the outgoing traffic message 16, otherwise it doesn't.
  • the traffic is bi-directional during that session.
  • payload traffic from and to user devices connected to the Femto cell base station 1 does not always has to go through a single point such as the GGSN or Serving/P DN-GW anchor points 7.
  • a single point such as the GGSN or Serving/P DN-GW anchor points 7.
  • broadband user traffic between a device at home 4, 5 and the Internet 10 can go directly through the Access Edge Router 9, and not via the anchor point 7.
  • the present invention also relates to a method for forwarding a traffic message 13, 16 from an indoor base station 1 , where the method comprises the steps: 21 : determining if the traffic message 13, 16 should be forwarded to an external anchor point 7, used for routing traffic to and from certain services provided, or an external connection 9, used for routing traffic to and from broadband services; and
  • the invention is not limited to the embodiment described above, but may vary freely within the scope of the appended claims.
  • the actual contents of the forwarding policies may be configured in the anchor point 7 or sent to them from an external service policy server that in essence supplies a list of services, based on destination IP addresses or IP subnets, that has to be routed through the anchor point 7.
  • the default should be that the user intends to use other services than those connected to the anchor point 7, for example the Internet.
  • the anchor point may be any suitable node, the GGSN or Serving/PDN-GW are mentioned as examples only.
  • the present invention is applicable to any suitable indoor base station, not only the one using Femto cell base stations.
  • the forwarding policies may be any form of controlling means, intended for directing messages a desired route.
  • the fact that a message is routed to an anchor point does not necessarily mean that it is related to a service which the anchor point operator charges, but merely that the anchor point operator desires routing to take place, whatever the reason.
  • the router arrangement 20 is normally based on a standard routing functionality in the Femto cell base station 1 , where the forwarding policies may be constituted by a table of IP subnets and/or host routes to different destinations, where the table is stored in the Femto cell base station 1.
  • the default setting is to send data packet traffic directly to the other services 10, 12.
  • Any suitable protocol may be used for setting up the tunnel between the Femto cell base station 1 and the anchor point 7.
  • the protocol which originally is a basic protocol, has to be extended in order to handle the forwarding policies. If the GTP is used between the Femto cell base station 1 and the anchor point 7, the forwarding policies are sent from the anchor point 7, with extensions to the GTP protocol that is used, towards the Femto cell base station. The protocol used is then an extended GTP.
  • the actual format of the information elements for carrying the forwarding policies has to be extended from their original format.
  • the extended format may for example be modeled according to a format that is described in the Internet standards track protocol RFC 3442; Classless Static Route Option for Dynamic Host Configuration Protocol (DHCP).
  • DHCP Dynamic Host Configuration Protocol
  • PoP point-of presence
  • the PoP may be situated in the Access Edge Router.
  • PoP is primarily used for mobile phone traffic, where, in this invention, the broadband data packet traffic may be re-directed to another PoP, typically a PoP in the wire-bound telephone network.

Abstract

L'invention concerne un système de station de base intérieure qui comprend: une station de base intérieure (1); un point d'ancrage externe (7) et une connexion externe (9), la station de base intérieure (1) étant reliée au point d'ancrage externe (7) via la connexion externe (9). Le point d'ancrage externe (7) est conçu pour acheminer le trafic de paquets de données vers et depuis certains services fournis et la connexion externe (9) est conçue pour acheminer le trafic de paquets de données vers et depuis les services à large bande. Le système précité est conçu pour établir une connexion directe, un tunnel, entre la station de base intérieure (1) et le point d'ancrage externe (7). Seul le trafic de paquets de données que l'on souhaite voir traiter par le point d'ancrage (7) est acheminé via le tunnel (6), tout le reste du trafic de paquets de données étant traité par la connexion externe (9), l'acheminement étant déterminé sur la base de politiques d'acheminement. L'invention se rapporte également à un procédé et à un point d'ancrage correspondants.
PCT/EP2008/055305 2008-04-30 2008-04-30 Système de station de base intérieure WO2009132704A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2008/055305 WO2009132704A1 (fr) 2008-04-30 2008-04-30 Système de station de base intérieure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2008/055305 WO2009132704A1 (fr) 2008-04-30 2008-04-30 Système de station de base intérieure

Publications (1)

Publication Number Publication Date
WO2009132704A1 true WO2009132704A1 (fr) 2009-11-05

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020080752A1 (en) * 2000-12-22 2002-06-27 Fredrik Johansson Route optimization technique for mobile IP
US20040208153A1 (en) * 2003-04-16 2004-10-21 Jerry Mizell Policy based mobile IP

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020080752A1 (en) * 2000-12-22 2002-06-27 Fredrik Johansson Route optimization technique for mobile IP
US20040208153A1 (en) * 2003-04-16 2004-10-21 Jerry Mizell Policy based mobile IP

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
3RD GENERATION PARTNERSHIP PROJECT (3GPP): "3GPP TS 23.401 v8.0.0 - 3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; GPRS enhancements for E-UTRAN access (Release 8)", 3RD GENERATION PARTNERSHIP PROJECT (3GPP); TECHNICALSPECIFICATION (TS), XX, XX, vol. 23.401v, no. 8.0.0, 1 December 2007 (2007-12-01), pages 1 - 167, XP002471565 *

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