US20130258900A1 - Method and apparatus for communicating via a gateway - Google Patents

Method and apparatus for communicating via a gateway Download PDF

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Publication number
US20130258900A1
US20130258900A1 US13/807,247 US201113807247A US2013258900A1 US 20130258900 A1 US20130258900 A1 US 20130258900A1 US 201113807247 A US201113807247 A US 201113807247A US 2013258900 A1 US2013258900 A1 US 2013258900A1
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local area
area network
network
gateway
local
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US13/807,247
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Heikki Kokkinen
Mika Rinne
Sami Kekki
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Nokai Corp
Nokia Technologies Oy
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Nokai Corp
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Publication of US20130258900A1 publication Critical patent/US20130258900A1/en
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/18Selecting a network or a communication service
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W92/00Interfaces specially adapted for wireless communication networks
    • H04W92/02Inter-networking arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • H04W24/10Scheduling measurement reports ; Arrangements for measurement reports
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W28/00Network traffic management; Network resource management
    • H04W28/16Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18Negotiating wireless communication parameters
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/08Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/14Access restriction or access information delivery, e.g. discovery data delivery using user query or user detection

Definitions

  • the present application relates generally to mobile communications and local-area network connectivity.
  • local-area networks may be employed to offer connectivity in specific high-volume locations such as homes, enterprises, railway stations or department stores.
  • Local-area networks may be bundled with cellular networks, so that one operator offers connectivity via both options. Some local-area cells may cover areas that are comparable in size to medium-sized cellular cells. Typically local-area cells are isolated, while cellular networks support handovers whereby mobile terminals can roam from one cell to another without experiencing a substantial discontinuity in service.
  • Local area networks may be suited to high-volume traffic such as downloading or streaming. Operators may desire to compile statistics on subscriber behaviour.
  • cellular traffic may be voice-centric and local-network traffic may be data-centric.
  • Data-centric traffic may be conveyed as internet protocol, IP, traffic, for example.
  • Statistics such as traffic volume or talk times may be used as a basis for billing subscribers.
  • an apparatus comprising logic circuitry configured to cause a connection to be established to a local area network, memory configured to store information relating to the local area network, the logic circuitry being configured to cause at least part of the information relating to the local area network to be transmitted from the apparatus to a gateway selection function; and transceiver circuitry configured to receive configuration information from the gateway selection function, wherein the gateway selection function is comprised in a core network of a cellular communication network.
  • a connection to be established to a local area network comprising causing information relating to the local area network to be transmitted from a user equipment to a gateway selection function in a core network of a cellular communication network; and receiving reconfiguration information from the gateway selection function.
  • an apparatus comprising at least one processor; and at least one memory including computer program code, the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus to perform at least the following: receive information relating to a local area network from a user equipment; determine whether at least one method to control the local area network can be obtained, responsive to at least one method to control the local area network being successfully obtained, cause the local area network to be configured by using the method, and cause local area network parameters in the user equipment to be configured.
  • FIG. 1 illustrates data traffic according to an example embodiment of the present invention
  • FIG. 2 illustrates an example apparatus 201 capable of supporting embodiments of the present invention
  • FIG. 3 illustrates data traffic according to an example embodiment of the present invention.
  • FIG. 4 illustrates data traffic according to an example embodiment of the present invention.
  • FIG. 5 is a flowchart of a process in a user equipment according to an example embodiment of the invention.
  • FIG. 6 is a flowchart of a process in a gateway selection function according to an example embodiment of the invention.
  • FIG. 7 is a signaling diagram relating to an example embodiment of the invention.
  • FIGS. 1 through 7 of the drawings An example embodiment of the present invention and its potential advantages are understood by referring to FIGS. 1 through 7 of the drawings.
  • Base station 120 may be alternatively be a base station according to long term evolution, LTE, technology, known as an eNB. Base station 120 may alternatively conform to other standards, such as GSM, IS-95, cdma2000 or to a combination of two or more technologies.
  • Cellular gateway 130 may be configured between base station 120 and internet 140 . Cellular gateway 130 may be controlled by an operator of a cellular network wherein it and base station 120 are comprised. Cellular gateway 130 may be configured to provide mobility services. Cellular gateway 130 may be configured to collect statistics of use for cellular subscribers. For example, cellular gateway 130 may record the volume of traffic a subscriber uploads to or downloads from the Internet 140 .
  • cellular gateway 130 may be configured to enable an operator to control flows of data between subscribers and external networks such as Internet 140 .
  • Cellular gateway 130 may also provide configurations related to policy control, routing or charging options.
  • Cellular gateway 130 may be configured to cause traffic shaping, traffic flow quality of service labeling and/or traffic flow quality control.
  • Cellular gateway 130 may include a user context profile that allows discretisation of the user from other users, or the traffic of a user from the traffic of other users. The user context profile may further include differentiation for the traffic flows based on profiles derived from the subscription information, for example the mentioned restriction on gambling.
  • UE 110 enables it's user to access information on an external network such as, for example, the Internet 140 via a local route of a local area network.
  • the local route comprises a local access point 150 , which may be a wireless local area network, WLAN, access point, a 3 rd generation partnership project, 3GPP, local internet protocol access, LIPA, access point or an access point or base station according to another local connectivity technology.
  • local access point 150 may be a wire-line access such as, for example, a LAN/Ethernet connection or a serial port.
  • the local route may also comprise a local gateway 160 , which may be configured to control, enable and/or restrict traffic between UE 110 and external networks such as, for example, the Internet 140 .
  • Local gateway 160 may collect statistics on usage of the local route.
  • the operator of the local route may desire the statistics to be able to invoice cellular operators for traffic incurred by their subscribers along the local route, for example.
  • FIG. 3 illustrates data traffic according to an example embodiment of the present invention.
  • Reference numerals and units 110 , 120 , 130 , 140 , 150 and 160 in FIG. 3 substantially correspond to like reference numerals and units in FIG. 1 .
  • FIG. 3 additionally illustrates a gateway selection function, GWSF, 310 .
  • GWSF 310 may be comprised in the core part of the cellular network, in detail in a home network of the subscriber of UE 110 .
  • GWSF may alternatively be comprised in a visited network of the subscriber of UE 110 .
  • GWSF 310 may be configured to communicate with UE 110 and an operator gateway 320 , which may be owned by an operator of a cellular network, for example.
  • GWSF 310 may be configured to cause local data traffic of UE 110 , that is, the traffic to and from UE 110 that is communicated via the local route, to be routed via the operator gateway 320 . Routing may be accomplished by tunneling, for example.
  • the operator gateway controls, enables and/or restricts traffic between UE 110 and external networks such as, for example, the Internet 140 .
  • both local gateway 160 and operator gateway 320 may control local traffic of UE 110 .
  • both local and cellular operators have control over the local traffic of UE 110 .
  • Local traffic which may be data intensive, is routed through both the local route and a cellular core network, which causes network load and possibly adds delay.
  • GWSF 310 may accomplish causing local data of UE 110 to be routed to operator gateway 320 by signaling to UE 110 that an address of operator gateway 320 must be used for all outgoing traffic, for example.
  • Directing traffic between the local gateway 160 and an operator gateway 320 may happen based on the routing policies, and its actual implementation may be based on tunneled transport between the local gateway 160 and the operator gateway 320 .
  • Traffic may be divided into tunneled and non-tunneled traffic based on traffic flow attributes such as, for example, a port number and/or an IP quintuple comprising a source address, a destination address, a source port, a destination port and a traffic class.
  • FIG. 4 illustrates data traffic according to an example embodiment of the present invention.
  • Reference numerals and units 110 , 120 , 130 , 140 , 150 , 160 and 310 in FIG. 4 substantially correspond to like reference numerals and units in FIG. 1 and FIG. 3 .
  • UE 110 After UE 110 connects to the local route, it may obtain information on the local area network. This information may comprise at least one of: an internet protocol, IP, address of UE 110 via the local area network, a network mask, a default gateway identity, a name-to-address mapping server identity, a local area network identity, and location information.
  • a network mask may comprise a part of an IP address that defines a set of IP addresses comprised in the local area network.
  • a default gateway identity may comprise an identity of local gateway 160 , for example. The identity of a default gateway may be presented as an IP address or fully qualified domain name, FQDN, for example.
  • a name-to-address mapping server identity may be a domain name system, DNS, server identity, for example.
  • a name-to-address mapping server may be specific to the local area network or a server hosted by another network.
  • a local area network identity may enable to uniquely identify which local area network the local route accessed by UE 110 is comprised in.
  • a local area network identity may comprise a service set identifier, SSID, or another kind of network identifier.
  • Location information may comprise an indication of a location of UE 110 , or a location of local access point 150 , for example.
  • UE 110 may store at least part of the information on the local area network into memory comprised in UE 110 .
  • the memory may be e.g. DRAM, SDRAM or magnetic media memory.
  • UE 110 may contact a GWSF 310 and provide at least a part, and in some embodiments all, of the obtained information to GWSF 310 .
  • the terminal may provide the information via the local route or via the cellular route, depending on the embodiment.
  • the local area network is not capable of modifying the information en route, which may increase the level of control a cellular operator has.
  • GWSF 310 may compare a provided IP address to one that is indicated as a source of the information, for example indicated in a lower layer header such as an IP header. If the information was provided via the local route and the addresses do not match, GWSF 310 may be configured to stop processing the information. Alternatively responsive to the provided address and the indicated address not matching, GWSF 310 may be configured to contact the indicated address and to request information. GWSF 310 may be configured to access a database to compare provided information with information in the database to determine whether the database comprises information relating to the local area network UE 110 is attached to. The database may comprise information on local area networks that GWSF 310 is enabled to control and/or configure.
  • the database may comprise methods capable of controlling or configuring gateways such as, for example, local gateway 160 .
  • Methods capable of controlling or configuring gateways may comprise protocol definitions and/or templates GWSF 310 may use to communicate configuration information to gateways in a format the gateways can understand. Protocol definitions may be defined, for example, by semantic descriptions to enable GWSF functions to take the described protocols into use by processing the semantic descriptions. Responsive to determining that the database has no information on the local area network accessed by UE 110 , GWSF 310 may be configured to communicate with local gateway 160 and request at least one method capable of configuring local gateway 160 .
  • local gateway 160 may be configured to advise GWSF 310 how GWSF 310 can configure local gateway 160 , for example by providing the requested method. Responsive to determining that the database has no information on the local area network accessed by UE 110 and a failure to obtain a method capable of configuring local gateway 160 by requesting, GWSF 310 may be configured to configure UE 110 to cause at least a part of local route traffic from UE 110 to be tunneled to an operator gateway 320 .
  • GWSF 310 is in this case configured to configure UE 110 to cause a part of the local route traffic of UE 110 to be tunneled to operator gateway 320 , for example by providing at least one traffic template to define traffic to be tunneled to operator gateway 320 .
  • GWSF 310 may configure UE 110 via either the local route or via the cellular route. Local route traffic from UE 110 not tunneled to an operator gateway 320 may be sent directly to an external network such as the Internet.
  • Determining whether at least one method capable to configure, for example, local gateway 160 can be obtained may comprise firstly searching a database and secondly requesting at least one method from the local gateway 160 .
  • a determination that a database doesn't comprise a method and a failure to obtain a method by querying constitutes an example of a determination that at least one method to configure local gateway 160 cannot be obtained.
  • the database may be comprised in GWSF 310 , or it may be comprised in a central database shared by a plurality of operators.
  • a shared database may be comprised in a different domain than the network of the cellular operator.
  • the database may reflect contractual agreements between network operators and define the extent to which GWSF 310 is enabled to configure the local area networks.
  • the database may comprise methods enabling GWSF functions of operators to control local area networks of different types. Responsive to finding information in the database on the local area network accessed by UE 110 or to obtaining a method by requesting, GWSF 310 may be configured to contact the local area network, for example GWSF 310 may be configured to contact local gateway 160 . GWSF 310 may request that local gateway 160 configure parameters relating to UE 110 .
  • FIG. 6 is a flowchart of a process in a gateway selection function according to an example embodiment of the invention.
  • information relating to a local area network is received in a gateway selection function, the information originating in a user equipment.
  • the information may be conveyed from the user equipment to the gateway selection function via a local area network or via a cellular network.
  • the obtaining may comprise that the gateway selection function queries a database for a suitable method, wherein the local area network may be identified using at least in part the received information.
  • the database may be comprised in the gateway selection function or it may be external to it.
  • the gateway selection function may configure the local area network by using the obtained method.
  • the configuring may comprise controlling. For example traffic filters may be inserted between a user equipment and external networks, and/or the gateway selection function may request traffic statistics concerning data exchanged between user equipment and external networks.
  • the gateway selection function may configure local area network parameters in the user equipment. This configuring may take place via either the local area network or via a cellular network.
  • the configuration parameters sent to the user equipment may comprise, for example, context and/or bearer parameters and traffic filters. If in phase 620 it was determined that a method could not be obtained, the process may move to optional phase 650 .
  • the gateway selection function may cause the user equipment to cause at least part of its local route traffic to be tunneled to an operator gateway.
  • the memory may be solid-state memory, dynamic random access memory (DRAM), magnetic, holographic or other kind of memory.
  • the apparatus may comprise logic circuitry 210 c configured to access the memory 210 b and control the transceiver circuitry 210 a .
  • the logic circuitry 210 c may be implemented as software, hardware or a combination of software and hardware.
  • the logic circuitry 210 c may execute program code stored in memory 210 b to control the functioning of the apparatus 201 and cause it to perform functions related to embodiments of the invention.
  • the logic circuitry 210 c may be configured to initiate functions in the apparatus 201 , for example the sending of data units via the transceiver circuitry 210 a .
  • the logic circuitry 210 c may be control circuitry.
  • the transceiver circuitry 210 a , memory 210 b and/or logic circuitry 210 c may comprise hardware and/or software elements comprised in the control apparatus 210 .
  • Memory 210 b may be comprised in the control apparatus 210 , be external to it or be both external and internal to the control apparatus 210 such that the memory is split to an external part and an internal part. If the apparatus 201 does not comprise a control apparatus 210 the transceiver circuitry 210 a , memory 210 b and logic circuitry 210 c may be comprised in the apparatus as hardware elements such as integrated circuits or other electronic components.
  • FIG. 7 is a signaling diagram relating to an example embodiment of the invention.
  • FIG. 7 comprises messages all of which are not mandatory features of the invention, and FIG. 7 may not illustrate a particularly advantageous embodiment.
  • FIG. 7 illustrates an embodiment to which the invention is not limited. Some phases of signaling may be effected in a different order than illustrated. Time flows from the top to the bottom of the signaling diagram.
  • UE may obtain access selection policies, for example from an ANDSF function via any of the available network connections it may have.
  • the local radio access functionality within the UE labeled LA, may be configured to receive beacons from local area network local access points, labeled AP in FIG. 7 .
  • UE may be configured to select from among a plurality of accessible local area networks.
  • Beacons may comprise, for example, SSID and/or local network name information.
  • Local area networks may be configured according to wireless local area network, WLAN, standards, for example.
  • the NAT function may manage IP connections in the subnet domain of the selected local area network for example to control private IP addresses.
  • the UE may then be configured to contact a MME in a cellular network to obtain assistance in selecting a local gateway, LGW.
  • the MME may be, responsive to the message from the UE, configured to check if it can configure, control, or otherwise communicate with the dGW to the extent that dGW could operate as a LGW.
  • the MME may be, responsive to the message from the UE, configured to run a local gateway, LGW, selection algorithm whereby the MME may select the dGW as the LGW.
  • the MME may be configured to configure the dGW by loading operator policies into the dGW, which the dGW may be configured to take into use and acknowledge to the MME. Responsive to the acknowledgement, the MME may be configured to configure the UE by confirming it may continue to use the dGW.
  • the MME may perform at least some functionalities of a gateway selection function, GWSF, as described in this document. As a special embodiment, the MME could negatively acknowledge that a UE is not recommended to use that dGW.
  • the UE accesses network services, for example Internet or Intranet services via the network labeled Net in FIG. 7 , through the dGW, which acts as a local gateway, LGW.
  • the UE may communicate with the MNO core by means of a network labeled “Net” in FIG. 7 .
  • the UE may be configured to request policy updates from an ANDSF function, and responsively to receive new policies in a UE context message, for example, and to take the new policies into use.
  • the UE may be configured to form a data connection to a server in an external network, for example the Internet or an Intranet, via the dGW acting as LGW.
  • the dGW may provide NAT services between the local area network and external networks.
  • the IP address of the UE at the dGW is labelled as IP UE dGW in FIG. 7 .
  • a technical effect of one or more of the example embodiments disclosed herein is that an operator is enabled to control a subscriber's local route traffic without routing the local route traffic through a network of the operator.
  • a GWSF can configure local route parameters of a user equipment via the cellular route, rendering it impossible for a local network operator to tamper with the configuration.
  • operators can share methods to control how local area networks handle traffic to/from their subscribers when they are using a local route.
  • Embodiments of the present invention may be implemented in software, hardware, application logic or a combination of software, hardware and application logic.
  • the software, application logic and/or hardware may reside on memory 210 b , for example.
  • the application logic, software or an instruction set is maintained on any one of various conventional computer-readable media.
  • a “computer-readable medium” may be any media or means that can contain, store, communicate, propagate or transport the instructions for use by or in connection with an instruction execution system, apparatus, or device, such as a computer, with one example of a computer described and depicted in FIG. 2 .
  • the different functions discussed herein may be performed in a different order and/or concurrently with each other. Furthermore, if desired, one or more of the above-described functions may be optional or may be combined.

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Abstract

In accordance with an example embodiment of the present invention, a user equipment establishes a connection to a local area network, transmits information relating to the local area network to a gateway selection function, the gateway selection function determines whether a method to configure the local area network can be obtained, and the gateway selection function configures the local area network and local route parameters in the user equipment either via the local area network or via a cellular network.

Description

    TECHNICAL FIELD
  • The present application relates generally to mobile communications and local-area network connectivity.
  • BACKGROUND
  • Parallel to a proliferation of cellular communications, a proliferation of local-area communications has been observed. Whereas cellular communications take place over cellular networks covering large areas, even entire countries or substantial sections thereof, local-area networks may be employed to offer connectivity in specific high-volume locations such as homes, enterprises, railway stations or department stores.
  • Local-area networks may be bundled with cellular networks, so that one operator offers connectivity via both options. Some local-area cells may cover areas that are comparable in size to medium-sized cellular cells. Typically local-area cells are isolated, while cellular networks support handovers whereby mobile terminals can roam from one cell to another without experiencing a substantial discontinuity in service.
  • Local area networks may be suited to high-volume traffic such as downloading or streaming. Operators may desire to compile statistics on subscriber behaviour. In some cases, cellular traffic may be voice-centric and local-network traffic may be data-centric. Data-centric traffic may be conveyed as internet protocol, IP, traffic, for example. Statistics such as traffic volume or talk times may be used as a basis for billing subscribers.
  • SUMMARY
  • Various aspects of examples of the invention are set out in the claims.
  • According to a first aspect of the present invention, there is provided an apparatus, comprising logic circuitry configured to cause a connection to be established to a local area network, memory configured to store information relating to the local area network, the logic circuitry being configured to cause at least part of the information relating to the local area network to be transmitted from the apparatus to a gateway selection function; and transceiver circuitry configured to receive configuration information from the gateway selection function, wherein the gateway selection function is comprised in a core network of a cellular communication network.
  • According to a second aspect of the present invention, there is provided method, comprising causing a connection to be established to a local area network, causing information relating to the local area network to be transmitted from a user equipment to a gateway selection function in a core network of a cellular communication network; and receiving reconfiguration information from the gateway selection function.
  • According to a third aspect of the present invention, there is provided an apparatus, comprising at least one processor; and at least one memory including computer program code, the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus to perform at least the following: receive information relating to a local area network from a user equipment; determine whether at least one method to control the local area network can be obtained, responsive to at least one method to control the local area network being successfully obtained, cause the local area network to be configured by using the method, and cause local area network parameters in the user equipment to be configured.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • For a more complete understanding of example embodiments of the present invention, reference is now made to the following descriptions taken in connection with the accompanying drawings in which:
  • FIG. 1 illustrates data traffic according to an example embodiment of the present invention;
  • FIG. 2 illustrates an example apparatus 201 capable of supporting embodiments of the present invention;
  • FIG. 3 illustrates data traffic according to an example embodiment of the present invention.
  • FIG. 4 illustrates data traffic according to an example embodiment of the present invention.
  • FIG. 5 is a flowchart of a process in a user equipment according to an example embodiment of the invention;
  • FIG. 6 is a flowchart of a process in a gateway selection function according to an example embodiment of the invention;
  • FIG. 7 is a signaling diagram relating to an example embodiment of the invention.
  • DETAILED DESCRIPTION OF THE DRAWINGS
  • An example embodiment of the present invention and its potential advantages are understood by referring to FIGS. 1 through 7 of the drawings.
  • FIG. 1 illustrates data traffic according to an example embodiment of the present invention. FIG. 1 illustrates a user equipment, UE, 110, which may be for example a mobile phone, smartphone, communicator, Internet tablet, cellular organizer, personal digital assistant with wireless connectivity or another wireless user device. The UE may be configured to enable it's user to access information on the Internet 140. According to a first option, the UE enables it's user to access information on an external network such as, for example, the Internet 140 via a cellular communication route, which goes through a cellular base station 120. Base station 120 may be a base station according to wideband code division multiple access, WCDMA, technology, known as a node-B. WCDMA may include high speed packet access, HSPA, technology as well. Base station 120 may be alternatively be a base station according to long term evolution, LTE, technology, known as an eNB. Base station 120 may alternatively conform to other standards, such as GSM, IS-95, cdma2000 or to a combination of two or more technologies. Cellular gateway 130 may be configured between base station 120 and internet 140. Cellular gateway 130 may be controlled by an operator of a cellular network wherein it and base station 120 are comprised. Cellular gateway 130 may be configured to provide mobility services. Cellular gateway 130 may be configured to collect statistics of use for cellular subscribers. For example, cellular gateway 130 may record the volume of traffic a subscriber uploads to or downloads from the Internet 140. Alternatively or in addition the time-of-day of data usage may be recorded and access to certain domains may be restricted by cellular gateway 130. For example, a subscription purchased for a child may be configured to disallow access to gambling services. In general, cellular gateway 130 may be configured to enable an operator to control flows of data between subscribers and external networks such as Internet 140. Cellular gateway 130 may also provide configurations related to policy control, routing or charging options. Cellular gateway 130 may be configured to cause traffic shaping, traffic flow quality of service labeling and/or traffic flow quality control. Cellular gateway 130 may include a user context profile that allows discretisation of the user from other users, or the traffic of a user from the traffic of other users. The user context profile may further include differentiation for the traffic flows based on profiles derived from the subscription information, for example the mentioned restriction on gambling.
  • According to a second option, UE 110 enables it's user to access information on an external network such as, for example, the Internet 140 via a local route of a local area network. The local route comprises a local access point 150, which may be a wireless local area network, WLAN, access point, a 3rd generation partnership project, 3GPP, local internet protocol access, LIPA, access point or an access point or base station according to another local connectivity technology. In addition or alternatively to a wireless access point, local access point 150 may be a wire-line access such as, for example, a LAN/Ethernet connection or a serial port. The local route may also comprise a local gateway 160, which may be configured to control, enable and/or restrict traffic between UE 110 and external networks such as, for example, the Internet 140. Local gateway 160 may collect statistics on usage of the local route. The operator of the local route may desire the statistics to be able to invoice cellular operators for traffic incurred by their subscribers along the local route, for example.
  • FIG. 3 illustrates data traffic according to an example embodiment of the present invention. Reference numerals and units 110, 120, 130, 140, 150 and 160 in FIG. 3 substantially correspond to like reference numerals and units in FIG. 1. FIG. 3 additionally illustrates a gateway selection function, GWSF, 310. GWSF 310 may be comprised in the core part of the cellular network, in detail in a home network of the subscriber of UE 110. GWSF may alternatively be comprised in a visited network of the subscriber of UE 110. GWSF 310 may be configured to communicate with UE 110 and an operator gateway 320, which may be owned by an operator of a cellular network, for example. GWSF 310 may be configured to cause local data traffic of UE 110, that is, the traffic to and from UE 110 that is communicated via the local route, to be routed via the operator gateway 320. Routing may be accomplished by tunneling, for example. When local data traffic of UE 110 is routed via the operator gateway 320, the operator gateway controls, enables and/or restricts traffic between UE 110 and external networks such as, for example, the Internet 140. In the arrangement illustrated in FIG. 3, therefore, both local gateway 160 and operator gateway 320 may control local traffic of UE 110. In this case, both local and cellular operators have control over the local traffic of UE 110. Local traffic, which may be data intensive, is routed through both the local route and a cellular core network, which causes network load and possibly adds delay.
  • GWSF 310 may accomplish causing local data of UE 110 to be routed to operator gateway 320 by signaling to UE 110 that an address of operator gateway 320 must be used for all outgoing traffic, for example. Directing traffic between the local gateway 160 and an operator gateway 320 may happen based on the routing policies, and its actual implementation may be based on tunneled transport between the local gateway 160 and the operator gateway 320. Traffic may be divided into tunneled and non-tunneled traffic based on traffic flow attributes such as, for example, a port number and/or an IP quintuple comprising a source address, a destination address, a source port, a destination port and a traffic class. Traffic may also or alternatively be divided based on traffic statistics, subscription information, or traffic offload policy definitions, for example. GWSF 310 may be configured to provide at least one filter comprising criteria for allocating traffic to tunneled and non-tunneled traffic. GWSF 310 may be configured to provide the at least one filter to the local gateway 160.
  • FIG. 4 illustrates data traffic according to an example embodiment of the present invention. Reference numerals and units 110, 120, 130, 140, 150, 160 and 310 in FIG. 4 substantially correspond to like reference numerals and units in FIG. 1 and FIG. 3.
  • Compared to FIG. 3, the arrangement of FIG. 4 omits the operator gateway 320 of FIG. 3. Some functions of the operator gateway 320 are implemented instead in local gateway 160 as will be described hereinbelow. GWSF 310 may be arranged to communicate with UE 110 and local gateway 160. GWSF 310 may be owned or operated by a cellular operator, or be in substantial communication with a cellular operator allowing the cellular operator access to information contained in GWSF 310. When UE 110 uses the local route in the illustrated embodiment, UE 110 may initially obtain information on a local area network accessible to it, for example from an apparatus in a cellular network tasked to assist cellular terminals to find local area networks. Alternatively, the UE 110 may scan for local area networks itself and attempt to attach to a local area network discovered in such a scan. UE 110 may also be pre-provisioned with lists of preferred local area networks.
  • After UE 110 connects to the local route, it may obtain information on the local area network. This information may comprise at least one of: an internet protocol, IP, address of UE 110 via the local area network, a network mask, a default gateway identity, a name-to-address mapping server identity, a local area network identity, and location information. A network mask may comprise a part of an IP address that defines a set of IP addresses comprised in the local area network. A default gateway identity may comprise an identity of local gateway 160, for example. The identity of a default gateway may be presented as an IP address or fully qualified domain name, FQDN, for example. A name-to-address mapping server identity may be a domain name system, DNS, server identity, for example. A name-to-address mapping server may be specific to the local area network or a server hosted by another network. A local area network identity may enable to uniquely identify which local area network the local route accessed by UE 110 is comprised in. A local area network identity may comprise a service set identifier, SSID, or another kind of network identifier. Location information may comprise an indication of a location of UE 110, or a location of local access point 150, for example. UE 110 may store at least part of the information on the local area network into memory comprised in UE 110. The memory may be e.g. DRAM, SDRAM or magnetic media memory.
  • After obtaining information on the local area network, UE 110 may contact a GWSF 310 and provide at least a part, and in some embodiments all, of the obtained information to GWSF 310. The terminal may provide the information via the local route or via the cellular route, depending on the embodiment. When providing information via the cellular route, the local area network is not capable of modifying the information en route, which may increase the level of control a cellular operator has.
  • GWSF 310 may compare a provided IP address to one that is indicated as a source of the information, for example indicated in a lower layer header such as an IP header. If the information was provided via the local route and the addresses do not match, GWSF 310 may be configured to stop processing the information. Alternatively responsive to the provided address and the indicated address not matching, GWSF 310 may be configured to contact the indicated address and to request information. GWSF 310 may be configured to access a database to compare provided information with information in the database to determine whether the database comprises information relating to the local area network UE 110 is attached to. The database may comprise information on local area networks that GWSF 310 is enabled to control and/or configure. The database may comprise methods capable of controlling or configuring gateways such as, for example, local gateway 160. Methods capable of controlling or configuring gateways may comprise protocol definitions and/or templates GWSF 310 may use to communicate configuration information to gateways in a format the gateways can understand. Protocol definitions may be defined, for example, by semantic descriptions to enable GWSF functions to take the described protocols into use by processing the semantic descriptions. Responsive to determining that the database has no information on the local area network accessed by UE 110, GWSF 310 may be configured to communicate with local gateway 160 and request at least one method capable of configuring local gateway 160. Responsive to the request, local gateway 160 may be configured to advise GWSF 310 how GWSF 310 can configure local gateway 160, for example by providing the requested method. Responsive to determining that the database has no information on the local area network accessed by UE 110 and a failure to obtain a method capable of configuring local gateway 160 by requesting, GWSF 310 may be configured to configure UE 110 to cause at least a part of local route traffic from UE 110 to be tunneled to an operator gateway 320. In an embodiment, GWSF 310 is in this case configured to configure UE 110 to cause a part of the local route traffic of UE 110 to be tunneled to operator gateway 320, for example by providing at least one traffic template to define traffic to be tunneled to operator gateway 320. GWSF 310 may configure UE 110 via either the local route or via the cellular route. Local route traffic from UE 110 not tunneled to an operator gateway 320 may be sent directly to an external network such as the Internet.
  • Determining whether at least one method capable to configure, for example, local gateway 160 can be obtained may comprise firstly searching a database and secondly requesting at least one method from the local gateway 160. A determination that a database doesn't comprise a method and a failure to obtain a method by querying constitutes an example of a determination that at least one method to configure local gateway 160 cannot be obtained.
  • The database may be comprised in GWSF 310, or it may be comprised in a central database shared by a plurality of operators. A shared database may be comprised in a different domain than the network of the cellular operator. The database may reflect contractual agreements between network operators and define the extent to which GWSF 310 is enabled to configure the local area networks. The database may comprise methods enabling GWSF functions of operators to control local area networks of different types. Responsive to finding information in the database on the local area network accessed by UE 110 or to obtaining a method by requesting, GWSF 310 may be configured to contact the local area network, for example GWSF 310 may be configured to contact local gateway 160. GWSF 310 may request that local gateway 160 configure parameters relating to UE 110. For example, GWSF 310 may request local gateway 160 to collect statistics on local route traffic of UE 110 and report it to the GWSF 310 or another node, for example a node comprised in a network operated by the operator of GWSF 310. Responsive to determining that a subscription of UE 110 comprises access restrictions, GWSF 310 may request that local gateway 160 configure the restriction parameters into use. For example, GWSF 310 may request that local gateway 160 disallow local route traffic between UE 110 and internet sites hosting gambling or pornography. GWSF 310 may provide local gateway 160 a list of disallowed hosts, or local gateway 160 may have access to lists of disallowed hosts. For example, if GWSF 310 indicates UE 110 isn't allowed to access gambling sites, local gateway 160 may access a list of gambling sites and apply filters to block messages between UE 110 and hosts comprised on the list.
  • GWSF 310 may request the local gateway 160 to re-assign a new IP address to UE 110. GWSF 310 may also or alternatively request local gateway 160 to change dynamic host configuration protocol, DHCP, parameters of UE 110. By controlling the local gateway 160, the cellular operator is enabled to control local route traffic of UE 110 without routing the traffic through the operator's cellular core network.
  • GWSF 310 may configure traffic parameters relating to the local route also to UE 110. GWSF 310 may effect this configuration via either the cellular route or via the local route. When providing information via the cellular route, the local area network is not capable of modifying the information en route, which may increase the level of control a cellular operator has. GWSF 310 may request and receive from a cellular network accessibility information of UE 110 via the cellular route. For example, GWSF 310 may insert traffic filters similar to those configured to local gateway 160 also to UE 110. GWSF may alternatively insert filters only to UE 110. GWSF may configure bearer or context parameters to UE 110, allowing the operator to control local route traffic of UE 110 also at UE 110. As another example of configuring UE 110, GWSF 310 may indicate that UE 110 may continue to use the local route and local gateway 160. In this case, local area network parameters in the user equipment are configured by confirming them.
  • FIG. 5 is a flowchart of a process in a user equipment according to an example embodiment of the invention; In phase 510 connectivity is established from the user equipment to a local area network. The connectivity may be established based on advice received over a non-local interface such as a cellular network interface, for example. A cellular network may comprise an access network discovery and selection function, ANDSF, configured to advise user equipments on interfaces to contact. Alternatively the user equipment may be configured to discover and attach to a local interface autonomously. In phase 520, the user equipment may store information relating to a local area network the user equipment has established connectivity to. The information may comprise at least one of: an internet protocol, IP, address of UE 110 via the local area network, a network mask, a default gateway identity, a name-to-address mapping server identity, a local area network identity, and location information.
  • In phase 530, the user equipment may at least in part transmit the information relating to the local area network to a gateway selection function. The gateway selection function may reside in a home network or a visited network of a subscriber of the user equipment, for example. The transmitting may take place over a cellular interface or via the local area network the user equipment has attached itself to. In phase 540, the user equipment may receive configuration information from the gateway selection function. The receiving may take place over a cellular interface or via the local area network the user equipment has attached itself to. The configuration information may comprise at least one of: a traffic filter, charging advice, a bandwidth quota or bearer or context parameters. Responsive to receiving the configuration information, the user equipment may take the configuration information into use and apply it to subsequent traffic sent and received via the local route.
  • FIG. 6 is a flowchart of a process in a gateway selection function according to an example embodiment of the invention. In phase 610, information relating to a local area network is received in a gateway selection function, the information originating in a user equipment. The information may be conveyed from the user equipment to the gateway selection function via a local area network or via a cellular network. In phase 620, it may be determined whether at least one method to control the local area network can be obtained. The obtaining may comprise that the gateway selection function queries a database for a suitable method, wherein the local area network may be identified using at least in part the received information. The database may be comprised in the gateway selection function or it may be external to it. The database may be a shared database in another domain, wherein the database service may be offered to the operator of the gateway selection function on a commercial or collaborative basis. The determining may alternatively or additionally comprise that the gateway selection function queries the local area network for a suitable method. For example, the gateway selection function may query for a template that it may use to transmit configuration data to the local area network. Responsive to the determination, the gateway selection function may obtain at least one method to control the local area network or alternatively to conclude that one cannot be obtained.
  • In phase 630, the gateway selection function may configure the local area network by using the obtained method. The configuring may comprise controlling. For example traffic filters may be inserted between a user equipment and external networks, and/or the gateway selection function may request traffic statistics concerning data exchanged between user equipment and external networks. In phase 640, the gateway selection function may configure local area network parameters in the user equipment. This configuring may take place via either the local area network or via a cellular network. The configuration parameters sent to the user equipment may comprise, for example, context and/or bearer parameters and traffic filters. If in phase 620 it was determined that a method could not be obtained, the process may move to optional phase 650. In phase 650 the gateway selection function may cause the user equipment to cause at least part of its local route traffic to be tunneled to an operator gateway.
  • FIG. 2 illustrates an example apparatus 201 capable of supporting embodiments of the present invention. The apparatus may correspond to UE 110 of FIG. 1, for example. The apparatus is a physically tangible object, for example a mobile telephone, personal digital assistant, data dongle or a similar device. The apparatus may comprise a control apparatus 210, for example a digital signal processor (DSP), processor, field-programmable gate array (FPGA), application-specific integrated circuit (ASIC), chipset or controller. The apparatus may further comprise transceiver circuitry 210 a configured to enable the apparatus 201 to connect to a network. The apparatus may comprise memory 210 b configured to store information, for example information on a local area network. The memory may be solid-state memory, dynamic random access memory (DRAM), magnetic, holographic or other kind of memory. The apparatus may comprise logic circuitry 210 c configured to access the memory 210 b and control the transceiver circuitry 210 a. The logic circuitry 210 c may be implemented as software, hardware or a combination of software and hardware. The logic circuitry 210 c may execute program code stored in memory 210 b to control the functioning of the apparatus 201 and cause it to perform functions related to embodiments of the invention. The logic circuitry 210 c may be configured to initiate functions in the apparatus 201, for example the sending of data units via the transceiver circuitry 210 a. The logic circuitry 210 c may be control circuitry. The transceiver circuitry 210 a, memory 210 b and/or logic circuitry 210 c may comprise hardware and/or software elements comprised in the control apparatus 210. Memory 210 b may be comprised in the control apparatus 210, be external to it or be both external and internal to the control apparatus 210 such that the memory is split to an external part and an internal part. If the apparatus 201 does not comprise a control apparatus 210 the transceiver circuitry 210 a, memory 210 b and logic circuitry 210 c may be comprised in the apparatus as hardware elements such as integrated circuits or other electronic components. The same applies if the apparatus 201 does comprise a control apparatus 210 but some, or all, of the transceiver circuitry 210 a, memory 210 b and logic circuitry 210 c are not comprised in the control apparatus 210. In embodiments where apparatus 201 is a mobile user equipment, apparatus 201 may comprise an antenna.
  • FIG. 7 is a signaling diagram relating to an example embodiment of the invention. FIG. 7 comprises messages all of which are not mandatory features of the invention, and FIG. 7 may not illustrate a particularly advantageous embodiment. FIG. 7 illustrates an embodiment to which the invention is not limited. Some phases of signaling may be effected in a different order than illustrated. Time flows from the top to the bottom of the signaling diagram.
  • The topmost part of FIG. 7, labeled “Internet access via cellular”, relates to a user equipment, UE, accessing internet services via a cellular route according to LTE technology. A wide area, WA, interface in the UE may be configured to communicate with a LTE system. Internet services are obtained in the UE by means of a packet data network, PDN, connection between the UE and a LTE core network comprising at least a packet data network gateway, PDN GW, and a mobility management entity, MME. The PDN GW and MME are comprised in a mobile network operator, MNO, core network. From this signaling, the UE gains knowledge of the IP address of the MME, labeled IP_MME.
  • In the second part of FIG. 7, labeled “Local area Access network selection”, it is illustrated how a UE chooses a local area network to attach to. Initially, UE may obtain access selection policies, for example from an ANDSF function via any of the available network connections it may have. The local radio access functionality within the UE, labeled LA, may be configured to receive beacons from local area network local access points, labeled AP in FIG. 7. Based at least in part on the received access selection policies and contents of received beacons, UE may be configured to select from among a plurality of accessible local area networks. Beacons may comprise, for example, SSID and/or local network name information. Local area networks may be configured according to wireless local area network, WLAN, standards, for example.
  • In the third part of FIG. 7, labeled “Internet access”, the UE accesses a network, for example an Intranet or Internet, via a selected local route gateway. Initially in this part, the UE establishes a connection to a selected access point. The connection, for example, may be established between the UE and a wireless local area network, WLAN, local area evolution, LAE, local area radio network, or other local area radio network access point or base station. The UE may then be configured to obtain configuration information from a dynamic host configuration protocol, DHCP, server. UE may then be configured to participate in the establishment of an IP connection to a default gateway, labeled dGW in FIG. 7. The dGW may be configured to utilize a network address translation, NAT, function. The NAT function may manage IP connections in the subnet domain of the selected local area network for example to control private IP addresses. The UE may then be configured to contact a MME in a cellular network to obtain assistance in selecting a local gateway, LGW. The MME may be, responsive to the message from the UE, configured to check if it can configure, control, or otherwise communicate with the dGW to the extent that dGW could operate as a LGW. The MME may be, responsive to the message from the UE, configured to run a local gateway, LGW, selection algorithm whereby the MME may select the dGW as the LGW. The MME may be configured to configure the dGW by loading operator policies into the dGW, which the dGW may be configured to take into use and acknowledge to the MME. Responsive to the acknowledgement, the MME may be configured to configure the UE by confirming it may continue to use the dGW. In this context, the MME may perform at least some functionalities of a gateway selection function, GWSF, as described in this document. As a special embodiment, the MME could negatively acknowledge that a UE is not recommended to use that dGW.
  • In the fourth part of FIG. 7, labeled “Internet Services”, the UE accesses network services, for example Internet or Intranet services via the network labeled Net in FIG. 7, through the dGW, which acts as a local gateway, LGW. The UE may communicate with the MNO core by means of a network labeled “Net” in FIG. 7. The UE may be configured to request policy updates from an ANDSF function, and responsively to receive new policies in a UE context message, for example, and to take the new policies into use. Using the new policies, the UE may be configured to form a data connection to a server in an external network, for example the Internet or an Intranet, via the dGW acting as LGW. The dGW may provide NAT services between the local area network and external networks. The IP address of the UE at the dGW is labelled as IP UE dGW in FIG. 7.
  • Without in any way limiting the scope, interpretation, or application of the claims appearing below, a technical effect of one or more of the example embodiments disclosed herein is that an operator is enabled to control a subscriber's local route traffic without routing the local route traffic through a network of the operator. Another technical effect of one or more of the example embodiments disclosed herein is that a GWSF can configure local route parameters of a user equipment via the cellular route, rendering it impossible for a local network operator to tamper with the configuration. Another technical effect of one or more of the example embodiments disclosed herein is that operators can share methods to control how local area networks handle traffic to/from their subscribers when they are using a local route.
  • Embodiments of the present invention may be implemented in software, hardware, application logic or a combination of software, hardware and application logic. The software, application logic and/or hardware may reside on memory 210 b, for example. In an example embodiment, the application logic, software or an instruction set is maintained on any one of various conventional computer-readable media. In the context of this document, a “computer-readable medium” may be any media or means that can contain, store, communicate, propagate or transport the instructions for use by or in connection with an instruction execution system, apparatus, or device, such as a computer, with one example of a computer described and depicted in FIG. 2. A computer-readable medium may comprise a computer-readable non-transitory storage medium that may be any media or means that can contain or store the instructions for use by or in connection with an instruction execution system, apparatus, or device, such as a computer. The scope of the invention comprises computer programs configured to cause methods according to embodiments of the invention to be performed.
  • If desired, the different functions discussed herein may be performed in a different order and/or concurrently with each other. Furthermore, if desired, one or more of the above-described functions may be optional or may be combined.
  • Although various aspects of the invention are set out in the independent claims, other aspects of the invention comprise other combinations of features from the described embodiments and/or the dependent claims with the features of the independent claims, and not solely the combinations explicitly set out in the claims.
  • It is also noted herein that while the above describes example embodiments of the invention, these descriptions should not be viewed in a limiting sense. Rather, there are several variations and modifications which may be made without departing from the scope of the present invention as defined in the appended claims.

Claims (23)

1. An apparatus, comprising:
logic circuitry configured to cause a connection to be established to a local area network;
memory configured to store information relating to the local area network;
the logic circuitry configured to cause at least part of the information relating to the local area network to be transmitted from the apparatus to a gateway selection function; and
transceiver circuitry configured to receive configuration information from the gateway selection function, wherein the configuration information comprises at least one of: a traffic filter, charging advice, a bandwidth quota, bearer parameters, and context parameters,
wherein the gateway selection function is comprised in a core network of a cellular communication network.
2. An apparatus according to claim 1, wherein the information relating to the local area network is caused to be transmitted via the local area network.
3. An apparatus according to claim 1, wherein the information relating to the local area network is caused to be transmitted via a cellular network.
4. An apparatus according to claim 1, wherein the configuration information is received via the local area network.
5. An apparatus according to claim 1, wherein the configuration information is received via a cellular network.
6. An apparatus according to claim 1, wherein the gateway selection function is comprised in a core network of either a home or a visited cellular network of a subscriber associated with the apparatus.
7. An apparatus according to claim 1, wherein the information relating to the local area network comprises at least one of: internet protocol address of the apparatus via the local area network, a network mask, a default gateway identity, a name-to-address mapping server identity, a local area network identity, and location information.
8. An apparatus according to claim 1, wherein the apparatus comprises a user equipment and an antenna.
9. A method, comprising:
causing a connection to be established to a local area network;
causing information relating to the local area network to be transmitted from a user equipment to a gateway selection function in a core network of a cellular communication network; and
receiving reconfiguration information from the gateway selection function, wherein the reconfiguration information comprises at least one of: a traffic filter, charging advice, a bandwidth quota, bearer parameters, and context parameters.
10. A method according to claim 9, wherein the information relating to the local area network is caused to be transmitted via the local area network.
11. A method according to claim 9, wherein the information relating to the local area network is caused to be transmitted via a cellular network.
12. A method according to claim 9, wherein the configuration information is received via the local area network.
13. A method according to claim 9, wherein the configuration information is received via a cellular network.
14. A method according to claim 9, wherein the information relating to the local area network comprises at least one of: internet protocol address of the apparatus via the local area network, a network mask, a default gateway identity, a name-to-address mapping server identity, a local area network identity, and location information.
15. An apparatus, comprising:
at least one processor; and
at least one memory including computer program code,
the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus to perform at least the following:
receive information relating to a local area network from a user equipment;
determine whether at least one method to control the local area network can be obtained;
responsive to at least one method to control the local area network being successfully obtained, cause the local area network to be configured by using the method; and
cause local area network parameters in the user equipment to be configured.
16. An apparatus according to claim 15, wherein the method to control the local area network is obtained from a database.
17. An apparatus according to claim 15, wherein the database is shared and is comprised in a different domain than the apparatus.
18. An apparatus according to claim 15, wherein the method to control the local area network is obtained by requesting if from the local area network.
19. An apparatus according to claim 15, wherein the local area network parameters in the user equipment are configured via the local area network.
20. An apparatus according to claim 15, wherein the local area network parameters in the user equipment are configured via a cellular network.
21. An apparatus according to claim 16, wherein responsive to a determination that at least one method to control the local area network cannot be obtained, the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus to configure the user equipment to cause at least a part of local area network traffic originating from the user equipment to be tunneled to an operator gateway.
22. A computer program product comprising a computer-readable non-transitory storage medium bearing computer program code embodied therein for use with a computer, the computer program code comprising:
code for causing a connection to be established to a local area network;
code for causing information relating to the local area network to be transmitted from a user equipment to a gateway selection function in a core network of a cellular communication network; and
code for receiving reconfiguration information from the gateway selection function.
23. A computer program product comprising a computer-readable non-transitory storage medium bearing computer program code embodied therein for use with a computer, the computer program code comprising:
code for receiving information relating to a local area network from a user equipment;
code for determining whether at least one method to control the local area network can be obtained;
code for causing the local area network to be configured by using the method responsive to at least one method to control the local area network being successfully obtained; and
code for causing local area network parameters in the user equipment to be configured.
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