US20100214991A1 - Method and mobile communication appliance for selecting a transmission path - Google Patents

Method and mobile communication appliance for selecting a transmission path Download PDF

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Publication number
US20100214991A1
US20100214991A1 US11/922,150 US92215006A US2010214991A1 US 20100214991 A1 US20100214991 A1 US 20100214991A1 US 92215006 A US92215006 A US 92215006A US 2010214991 A1 US2010214991 A1 US 2010214991A1
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Prior art keywords
transmission path
statement
database
communication
entry
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Abandoned
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US11/922,150
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English (en)
Inventor
Jürgen Luers
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Unify GmbH and Co KG
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Siemens AG
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Assigned to SIEMENS AKTIENGESELLSCHAFT reassignment SIEMENS AKTIENGESELLSCHAFT ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LUERS, JURGEN
Publication of US20100214991A1 publication Critical patent/US20100214991A1/en
Assigned to SIEMENS ENTERPRISE COMMUNICATIONS GMBH & CO. KG reassignment SIEMENS ENTERPRISE COMMUNICATIONS GMBH & CO. KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SIEMENS AKTIENGESELLSCHAFT
Assigned to UNIFY GMBH & CO. KG reassignment UNIFY GMBH & CO. KG CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: SIEMENS ENTERPRISE COMMUNICATIONS GMBH & CO. KG
Abandoned legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/025—Services making use of location information using location based information parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria

Definitions

  • the invention relates to a method for a mobile communication appliance and to a communication terminal for wirelessly accessing a plurality of transmission paths.
  • radio-based voice networks that is to say GSM networks, DECT networks and UMTS networks, for example
  • the radio-based voice networks can also be used for data transmission
  • radio-based data networks that is to say WLAN networks, WiMax networks and Bluetooth networks, for example
  • VoIP Voice Over Internet Protocol
  • multimodal mobile communication appliances are frequently used.
  • these are PCs which have both Bluetooth and WLAN transmission devices, or else mobile radios (telephones) which selectively support connections based on the GSM standard, the UMTS standard and/or the DECT standard.
  • mobile radios telephones
  • a user of such a communication appliance can thus select the transmission path which is to be used for the next communication link.
  • GSM Global System for Mobile communications
  • GPRS General Packet Radio Access
  • a transmission path is also selected automatically by the communication appliances by checking the availability of the various transmission paths at the time at which a communication link is initiated.
  • a field strength measurement is used to check whether the various base stations of different transmission paths (for example DECT, WLAN) can be received. If it is available, the (inexpensive) WLAN network is then selected, for example, using a priority list, whereas a GSM mobile radio link is selected as the transmission path if a WLAN network or a DECT cell is not available.
  • the object is achieved by a method in accordance with an independent patent claim and by a communication appliance in accordance with a further independent patent claim.
  • the object is achieved by using a method for selecting a transmission path for a communication link from a mobile communication appliance, where the mobile communication appliance can select at least two transmission paths.
  • a first step involves a statement about the location of the communication appliance being ascertained
  • a second step involves the ascertained statement being used to access a database for transmission paths
  • a third step involves at least one entry in the database being used to determine a preferred transmission path
  • a fourth step involves the preferred transmission path being selected and being used for a communication link.
  • This method allows location-dependent selection of the transmission path, with the entry in the database being able to be used to prescribe various preferred transmission paths for various locations.
  • the object is also achieved by proposing a communication appliance for wirelessly accessing a plurality of transmission paths, one of the plurality of transmission paths being able to be selected for a communication link.
  • the communication appliance is equipped with a position-finding device for ascertaining a statement about a geographical position of the communication appliance, and the communication appliance is equipped for accessing a database, the database having at least one entry with a statement, based on empirical values from past communication links, about a quality which can be expected for one of the transmission paths with at least one associated statement about a location.
  • the communication appliance is equipped with a selection device for one of the plurality of transmission paths, the selection device being in a form such that the statement about the location and the at least one database entry are used to select and use a transmission path which corresponds to a minimum quality requirement.
  • a communication appliance is always used to select that transmission path which, empirically, meets a prescribed minimum quality requirement for the location of the communication appliance. This means that it is always possible to select a transmission path which, although it is powerful enough, permits the most inexpensive and/or power-saving mode of operation possible for the communication appliance.
  • a user advantageously defines various criteria as aims, for example cost criteria, energy criteria, time criteria (duration of connection setup, transmission time for a particular volume of data, delay times etc.).
  • the database may be stored in the communication appliance itself, which means that access to the database is particularly rapid and simple, and it is a simple matter to prevent manipulation of the database by third parties.
  • a database which is available centrally in a communication network may also be used for this purpose, which means that a communication appliance can also use the empirical values and rules (routing rules) from other communication appliances.
  • the parallel use of both a local and a central database is also advantageous in many cases, because it firstly allows redundancy requirements to be met, and secondly allows “one's own” entries to be used preferably, in order to be able to resort to the centrally stored entries if such entries “of one's own” are not present.
  • the structure of radio networks and their locally differing reception circumstances and also the time-variant utilization level of transmission paths can easily be taken into account by virtue of use of the selected transmission path being followed by a quality registered in the process for the transmission path and the statement about the location being used by the communication appliance for a fresh entry in the database and/or for correcting an existing entry in the database.
  • the quality stored and taken into account may advantageously be a combination of individual criteria, e.g. costs, bandwidths, reliabilities (for example number of connections cut off per unit time), delay times (for example in the case of VoIP links) etc.
  • the data obtained through the continuous and automatic “care” of the entries in the database may advantageously also be used for optimizing a radio network to which an associated transmission path belongs. It is therefore possible in many cases to dispense with the separate measurement of radio areas and nevertheless to obtain a constantly up-to-date overview of radio ranges, “radio holes”, field strength distributions or the like. In this case, it is also possible for a central location (for example a system administrator) to make changes in the data records in the database such that future selection decisions are influenced. This makes it possible to control the utilization level of individual connecting paths and to avoid bottlenecks.
  • the database providing statistical statements about the quality of at least one transmission path for a particular time and/or time of day and/or day of the week, it is also possible to take account of changes on the transmission paths which are recurrent on the basis of time. By way of example, this involves taking account of cases in which particular transmission paths (for example a company WLAN) have a high utilization level at particular times of day (for example during normal business hours) and therefore provide reduced bandwidth.
  • particular transmission paths for example a company WLAN
  • particular times of day for example during normal business hours
  • the inventive method can be used particularly flexibly and often universally if a WLAN radio network, a GSM mobile radio network and/or a UMTS voice data radio network is selected for the transmission path. Accessing these widespread transmission paths means that there is a high likelihood of one or even more transmission paths always being available for selection.
  • FIGURE uses a schematic illustration to show a control device (“Call Processing”), a selection device and access units (“Connectors”) for a communication appliance.
  • the FIGURE shows a schematic illustration of components of a mobile communication appliance.
  • the mobile communication appliance is what is known as a “smart phone”, that is to say an appliance in which the functions of a mobile computer (“PDA”—Personal Digital Assistant) and the functions of a mobile radio (mobile telephone) are combined with one another.
  • PDA Personal Digital Assistant
  • the communication appliance is in multimodal form, that is to say has access units K (connectors) for various radio networks, in this case GSM, WLAN, Bluetooth, WiMax, UMTS, etc.
  • the communication appliance also has access units K for wired communication; for this, the FIGURE shows an Ethernet access unit by way of example.
  • each access unit K is associated with precisely one transmission method (GSM, Internet Protocol, ISDN . . . ), which means that the access units K in the FIGURE simultaneously represent transmission methods.
  • GSM Global System for Mobile communications
  • a transmission method can be used to access a plurality of transmission paths; by way of example, a single GSM connector can be used to access a plurality of mobile radio networks (even with different network operators) and a single LAN port can be used to access different VoIP gateways/gatekeepers or the like.
  • GSM Global System for Mobile communications
  • the communication appliance also has a control device CP (“Call Processing”) which the applications (not shown) on the communication appliance use as a control device and as an interface for external communication.
  • the control device CP is a call processing unit for switching voice links, as is known from circuit-switched communication installations (“PBX”).
  • PBX circuit-switched communication installations
  • control device CP uses a selection device AE to access different access units K.
  • the control device CP is in a form such that it sets up a communication link or a data channel to the selection device AE by transmitting not only a communication address (telephone number, IP address or the like) but also a statement about a quality requirement.
  • the statement about the quality requirement comprises a plurality of criteria.
  • the control device CP uses internal signaling to notify the selection device AE of a type (type statement) for the next communication link on the basis of the application which requires the communication link (or data channel or the like). That is to say that for voice links, for example, there is different signaling than for the transmission of an e-mail message or an SMS message.
  • a desired minimum bandwidth for example 128 kbit/s
  • the selection device AE works like a-single-access unit K.
  • the selection device AE therefore “conceals” the peculiarities of the individual access units K which are actually present. It is therefore also possible and advantageous for only an abstract descriptor (e.g. the name) for the desired call party to be transmitted from the control device CP to the selection device AE instead of a specific communication address (telephone number, IP address).
  • The—subsequently selected—transmission path and transmission method (and hence the access unit K to be used) are then used to retrieve the “appropriate” communication address from an address directory (preferably likewise stored in the database DB). It is therefore possible to change the transmission path and transmission method even during an ongoing call, for example from a VoIP link (with an IP address as communication address) to an ISDN link (with a “conventional” telephone number as communication address).
  • the selection device AE and the control device CP access a common database DB (empirical database), this database DB being integrated in the communication appliance DB in the present exemplary embodiment.
  • a common database DB empirical database
  • this database DB being integrated in the communication appliance DB in the present exemplary embodiment.
  • the communication appliance has a technical device, a position-finding device which assures at least coarse geographical position-finding for the communication appliance.
  • this is done by detecting the identification numbers (“base station IDs”) of the various radio cells in whose reception area the communication appliance is currently active.
  • the identification numbers and the reception field strengths of the respective radio cells are reported to the selection device AE by the various access units K at regular intervals of time. From the statements from the various access units K, the selection device AE creates an up-to-date location profile.
  • position-finding is also possible using a satellite-assisted system, for example GPS.
  • a “default location” can be prescribed for different times of day (e.g. week days between 12.00 and 16.00 hours: in the office having the coordinates xy).
  • a routing decision is made primarily on the basis of the current location and secondarily on the basis of other requirements.
  • a distinction can also be drawn primarily on the basis of the type of user or use (private/business etc.), or cost or quality features are considered first.
  • These settings can be influenced either by users or by an administrator, according to an authorization model.
  • a communication application is to be used to set up a video telephony link.
  • the selection device AE decides that only some of the available transmission paths and hence certain access units K are suitable for the communication link required, namely Ethernet, WLAN, WiMax and UMTS. To make this decision, the selection device AE loads a data record, describing the basic performance of the relevant access unit K and of the transmission path linked to it at the current location, from the database DB at least once for each available access unit K.
  • the selection device AE now ascertains the current availability of the previously selected access units K and hence of the transmission paths selected with them. This establishes that the access unit “Ethernet” is currently not available, that is to say that no Ethernet network port is connected or active.
  • the two WLAN access units (2.4 GHz; 5 GHz), the WiMax transmission path and the UMTS radio module are suitable for meeting the requirements transmitted with the request message.
  • the selection device AE therefore accesses the database DB again and loads a respective cost table for the suitable access units K in order to select the cheapest transmission path and hence the most suited access unit K according to the situation.
  • the selection device AE When the selection device AE has decided to use a particular access unit K (in this case the cheap 2.4 GHz WLAN is used), the desired connection is set up and the selection device awards the control device CP what is known as a “quality monitoring order”. On the basis of the “quality monitoring order”, the control device CP transmits a quality message, which is known as “feedback”, which is also known as a “QoS (Quality of Service) data collection (QDC)”, when the communication link previously set up has been terminated. With this quality message, the selection device AE receives statements about any connections which may have been cut off, the average, minimum and maximum transmission bandwidth and, if available, statements about the costs incurred.
  • feedback which is also known as a “QoS (Quality of Service) data collection (QDC)
  • the selection device AE uses these data to update the database DB, with a new data record first of all being created.
  • Already available empirical values about the location and about the transmission path used may alternatively or additionally involve an existing data record being updated.
  • a filter algorithm ensures that “outliers”, for example a single instance of a connection being cut off, do not result in the affected transmission path no longer being selected long term.
  • the filter algorithm ensures that “more recent” quality statements are given a higher weighting than statements from longer ago; this relates particularly also to cost statements, because providers are frequently changing the costs for their services. Statistical methods can thus be used to compile a plurality of data records.
  • the database DB has an optional interface to a network management system (not shown).
  • a network management system (not shown).
  • Such network management systems allow an overview to be obtained about data infrastructures and in so doing are used for error searches and network planning.
  • the QoS statements “automatically” ascertained when communication links are used and hence when transmission paths are used are—as described—used for constantly updating the database DB, so that the information in the database DB can be used as a replacement for complex separate network measurements.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
US11/922,150 2005-06-29 2006-06-13 Method and mobile communication appliance for selecting a transmission path Abandoned US20100214991A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102005030796A DE102005030796A1 (de) 2005-06-29 2005-06-29 Verfahren und mobiles Kommunikationsgerät zur Auswahl eines Übertragungsweges
DE102005030796.5 2005-06-29
PCT/EP2006/063162 WO2007000391A1 (de) 2005-06-29 2006-06-13 Verfahren und mobiles kommunikationsgerät zur auswahl eines übertragungsweges

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PCT/EP2006/063162 A-371-Of-International WO2007000391A1 (de) 2005-06-29 2006-06-13 Verfahren und mobiles kommunikationsgerät zur auswahl eines übertragungsweges

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US14/706,230 Continuation US9763181B2 (en) 2005-06-29 2015-05-07 Method and mobile communication appliance for selecting a transmission path

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EP (1) EP1897393B1 (de)
CN (2) CN104066157B (de)
AT (1) ATE450126T1 (de)
DE (2) DE102005030796A1 (de)
WO (1) WO2007000391A1 (de)

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Also Published As

Publication number Publication date
EP1897393B1 (de) 2009-11-25
US9763181B2 (en) 2017-09-12
WO2007000391A1 (de) 2007-01-04
CN101218840A (zh) 2008-07-09
DE102005030796A1 (de) 2007-01-04
DE502006005462D1 (de) 2010-01-07
CN104066157A (zh) 2014-09-24
US20150237570A1 (en) 2015-08-20
EP1897393A1 (de) 2008-03-12
CN104066157B (zh) 2019-01-11
ATE450126T1 (de) 2009-12-15

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