EP1228604A2 - Communications sans fil par voie hertzienne courte distance - Google Patents

Communications sans fil par voie hertzienne courte distance

Info

Publication number
EP1228604A2
EP1228604A2 EP01914703A EP01914703A EP1228604A2 EP 1228604 A2 EP1228604 A2 EP 1228604A2 EP 01914703 A EP01914703 A EP 01914703A EP 01914703 A EP01914703 A EP 01914703A EP 1228604 A2 EP1228604 A2 EP 1228604A2
Authority
EP
European Patent Office
Prior art keywords
network
wireless
short haul
wireless network
protocol
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP01914703A
Other languages
German (de)
English (en)
Inventor
Peter J. Hartmaier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Openwave Technologies Inc
Original Assignee
Openwave Technologies Inc
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 Openwave Technologies Inc filed Critical Openwave Technologies Inc
Publication of EP1228604A2 publication Critical patent/EP1228604A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/22—Alternate routing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/253—Telephone sets using digital voice transmission
    • H04M1/2535—Telephone sets using digital voice transmission adapted for voice communication over an Internet Protocol [IP] network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks

Definitions

  • the present invention is related to wireless communications and, more particularly, to the cooperative interaction between conventional wireless telephone networks and short haul radio networks, such as Bluetooth networks.
  • VoIP Voice over Internet Protocol
  • IP Internet Protocol
  • PSTN Public Switched Telephone Network
  • VoIP generally derives from the VoIP Forum, an effort by major equipment providers, to promote the use of ITU-T H.323, the standard for sending voice (audio) and video using IP on the public Internet and within private intranets and networks.
  • VoIP uses the Real Time Protocol (RTP) to help ensure that audio packets get delivered in a timely way. It is currently difficult to guarantee quality of service for Internet calls over the existing Internet connections. Better service is possible through private networks managed by an enterprise or by an Internet Telephony Service Provider (ITSP).
  • RTP Real Time Protocol
  • a VoIP device such as an access server with the VoIP feature, is positioned as a gateway.
  • the gateway receives packetized voice transmissions from users and then routes them to other users over an intranet, such as a Local or Wide Area Network(LAN/WAN) or, using a T-l or E-l interface, sends them over the PSTN.
  • LAN/WAN Local or Wide Area Network
  • E-l E-l interface
  • VoIP capabilities have improved to the point where it is now reasonable to use the Internet or other computer networks to handle voice calls.
  • a key requirement for successful VoIP deployment is the capability of the underlying IP-based network.
  • CATV Cable television or community access television
  • CATV is an increasingly popular way to interact with the World Wide Web and to access other forms of multimedia information and entertainment services.
  • CATV service providers have begun to offer support for high speed Internet access connections in the home.
  • Internet connections provide a much higher bandwidth than what is available from a traditional wireline telephone connection to the home.
  • Short haul radio systems such as Bluetooth or the HomeRF Shared Wireless Access Protocol (SWAP) are examples of systems that can provide local computer network access via wireless connections. These projects use the unlicensed 2.4 GHz spectrum to establish localized voice and data connections. These short haul radio systems can be used to link multiple devices within a short range.
  • SWAP HomeRF Shared Wireless Access Protocol
  • Bluetooth is a microchip-based technology with protocols that enable wireless digital communication between disparate electronic products. Instead of using proprietary cable connections or other wireline connections, Bluetooth uses a universal short-range radio link to link two or more devices in an ad hoc network. A group of devices connected via Bluetooth technology is called a piconet.
  • the Bluetooth-capable devices are peer units in that all units implement the RF, Baseband and Link Manager network layers.
  • a piconet may contain up to eight active devices in which one device acts as the Master and the other devices act as Slaves.
  • the Master device is simply a unit in the piconet to which the other, Slave units synchronize.
  • Bluetooth uses a pseudo-random hopping frequency schedule through 79 RF channels.
  • the typical transmission power for a Bluetooth device is 1 milliwatt, which gives the devices a normal transmission range of approximately 10-100 meters.
  • One of the existing attributes of Bluetooth is that two devices with this technology can be set to automatically recognize each other when they are close together.
  • General and specific inquiry messages are used by Bluetooth-capable devices to discover either all or a particular class of nearby Bluetooth devices. Upon receipt of an inquiry message, a device will broadcast its device address, access code and its clock information.
  • a device When a device does not have a connection, it monitors the RF channels in accordance with its own hopping schedule for access request messages. To establish a connection to another device, the Master unit must determine the Device Address of the other device to determine the proper hopping schedule. In addition, access requires knowledge of the Slave unit's Device Access Code (DAC).
  • the Master unit transmits a train of DACs at different hop frequencies. When a Slave unit detects its DAC, it signals a page response at the same hop frequency as the page signal. The Master unit then transits a Frequency Hop Synchronization (FHS) packet including the Master unit's clock, device address and device class. The Slave unit acknowledges the FHS and then the Master unit begins sending traffic packets.
  • FHS Frequency Hop Synchronization
  • the link manager protocol defines procedures for connection management activities, such as authentication, encryption, mode, quality of service and link type selection.
  • the telephony protocol defines procedures and messaging for call control and signaling functionality.
  • the Bluetooth specification supports 64 kbits/sec mu-law and A-law logarithmic PCM voice encoding and 64 kbit/sec Continuous Variable Slope Delta Modulation (CVSD).
  • the HomeRF SWAP system operates as either an ad hoc network or as a managed network under the control of a Connection Point.
  • control of the network is distributed among the participating stations.
  • a Connection Point is required to coordinate the system.
  • the Connection Point provides a gateway to the PSTN and can support both voice and data services.
  • wireless devices monitor the availability of short haul radio networks and register on the short haul networks when one is detected.
  • the short haul radio network may comply with the Bluetooth, HomeRF or other protocol or standard.
  • the wireless devices that use the present invention may include wireless telephones, wireless modems, pagers, and the like.
  • the wireless devices are equipped with short haul radio functionality in addition to normal cellular or PCS functions and are capable of communicating over short haul radio frequencies, such as the 2.4 GHz band, in addition to conventional wireless and cellular frequencies.
  • the short haul radio network is connected to the Public Switched Telephone Network (PSTN) or to the wireless network through a computer network or the Internet.
  • PSTN Public Switched Telephone Network
  • the wireless device can register with the wireless network and originate and receive calls through the computer network.
  • the short haul radio detects the presence of the edge device and switches to the short haul radio network frequencies.
  • the wireless device establishes a connection with the edge device, which then converts signals from the wireless device to a format compatible with the computer network. Signals from the wireless device may then be routed to other devices or servers on the computer network.
  • an application processor on the computer network provides an interface with the wireless network.
  • the application processor allows the wireless device to register on the wireless network.
  • the wireless network updates the device's location and sends information to the wireless device via the applications processor and the computer network.
  • Incoming calls to the wireless device are routed under the control of the application processor.
  • a VoIP server or gateway may be associated with the applications processor to facilitate routing voice calls to the device.
  • outgoing calls are routed through the edge device to a gateway into the PSTN.
  • the present invention provides a system and method for establishing wireless communications with a wireless device that is capable of communicating with both a wireless network and a short haul network.
  • the wireless device may be a wireless or cellular telephone, a pager, Personal Digital Assistants (PDA), wireless modem or the like.
  • PDA Personal Digital Assistants
  • the wireless device detects an edge device in a short haul radio network and establishes a communications link between the wireless device and the short haul network.
  • the existing communications links between the wireless device and the wireless network are courtesy terminated, and the wireless device registers with the wireless network as active on the short haul network through an applications processor that couples the short haul network and connected VoIP network to the wireless network.
  • the short haul network may comply with the Bluetooth protocol or any short haul communications protocol.
  • the wireless device communicates with the edge device using the Bluetooth protocol or other short haul protocol as appropriate.
  • the edge device may be any device that is capable of using the short haul network protocol, such as a personal computer, a WebTV device or any Internet or computer network device or appliance.
  • call setup messages from the wireless network may be directed to the short haul network for calls directed to the wireless device.
  • Call connections between the wireless network and the wireless device may be established to allow voice or data communications between the wireless device and a caller or device.
  • the wireless device can initiate calls, so that the wireless network receives call setup messages for calls initiated by the wireless device on the short haul network.
  • the wireless network or an application processor establishes call connections between the wireless network and the wireless device to complete calls initiated by the wireless device.
  • the present invention further provides a system and method for coupling a computer network to a wireless network, wherein the computer network is coupled to a short haul radio network.
  • the system comprises a device for receiving registration messages from the short haul radio network, such as an intelligent network node, a processor, a server or the like.
  • the registration messages are received via the computer network and have a format that is adapted for transmission over the computer network.
  • the registration messages from the computer network are typically converted to a different format that is adapted for the wireless network. These converted registration messages are then sent to the wireless network.
  • the system also includes a device for establishing a voice call connection between the wireless network and wireless devices that are active on the short haul radio network.
  • a converter device converts voice communication signals on said wireless network to a format that can be transmitted across said computer network to said short haul network.
  • This device may convert packet-based messages on the computer network to IS-41 messages on the wireless network or Intelligent Network Application Protocol (INAP) messages on the PSTN in order to set up the call connections and route calls between the networks.
  • INAP Intelligent Network Application Protocol
  • Voice communication signals are converted between PCM or compressed signals on said wireless network and packet-based signals on said computer network and then to the format used by the short haul radio.
  • the system may also comprise means for converting voice communications signals between a packetized voice format used by the wireless telephone and the packet-based signals on said computer network.
  • the means for converting voice communications signals does no conversion and, instead, encapsulates the message for transmission through the computer network and short haul radio link to the wireless telephone.
  • no conversion is required and the signal is transmitted directly to the wireless telephone.
  • the packet- based signals may be Voice over Internet Protocol (VoIP) signals.
  • the wireless network may comprise an HLR and a means for communicating with the HLR allows the wireless telephone to register on the short haul radio network.
  • the means for communicating with an HLR may be a processor, a server or the like, and further comprises a means for updating a current location of the wireless telephone.
  • the computer network may be connected to the wireless network as a functional entity of the wireless network, such as a functional entity defined in the IS-41 standard. Such a configuration enables the wireless network to interact with the computer network and to provide local mobility and profile information to the computer network.
  • the means for connecting the computer network to the wireless network can also operate to allow the computer network to function as a MSC on the wireless network.
  • the invention also provides an apparatus for integrating a wireless network to a computer network.
  • the wireless network has a protocol that facilitates interaction among network elements and provides enhanced and customized services to wireless devices.
  • the computer network has a protocol that facilitates transmission of signals across the computer network.
  • a device such as processor, computer or the like, translates signals from the wireless network protocol to the computer network protocol and from the computer network protocol to the wireless network protocol.
  • the apparatus also exchanges messages with the wireless network and with wireless devices that are active on a short haul radio network extension of said computer network.
  • the wireless network protocol may be an IS-41 protocol and the computer network protocol may be a packet- based protocol. INAP messages may also be exchanged with the PSTN.
  • Registration messages are received from the wireless devices that are active on the short haul radio network and translated to registration messages for the wireless network.
  • the wireless devices that are active on the short haul network are registered with an HLR on the wireless network.
  • Call connections may be established between the wireless network and the wireless telephones that are active on the short haul radio network.
  • a VoIP gateway converts between voice signals on the wireless network and packet-based voice signals on the computer network to allow voice calls to be completed from the wireless network to the wireless devices on the short haul network.
  • the present invention also provides a wireless device that is capable of communicating with both a wireless network and a short haul radio network.
  • the wireless telephone comprises circuitry and associated software, such as microprocessors, digital signal processors, Application Specific Integrated Circuits (ASIC) and the like.
  • the wireless telephone is capable of establishing a communications link with and registering on a wireless network that complies with any applicable wireless standard.
  • the wireless telephone also has the capability of establishing a communications link with and registering on a short haul radio network. These features allow the wireless device to register on either type of network independently.
  • the wireless telephone may be in communication with only one type of network or with both the wireless and short haul networks at the same time.
  • the wireless telephone can detect edge devices on the short haul radio network while still registered on the wireless network.
  • registration messages are sent to the wireless network when the communications link is established between the wireless device and the short haul network.
  • the communications link with the wireless network may be maintained while the wireless telephone sends registration messages over the short haul radio network.
  • the registration messages sent on the short haul radio network are used to update the wireless device's location in a database on the wireless network. This allows the wireless device to maintain communication through the wireless network while using more accurate location information from the short haul network.
  • the wireless device may move between short haul networks.
  • the wireless telephone may have the capability to detect a second short haul radio network while in communication with a first short haul radio network.
  • the wireless telephone moves from the first short haul network to the second by completing a handoff between the networks.
  • the voice communications may be incoming calls routed to a wireless telephone that is registered on the short haul network and associated computer network. Additionally, the voice communications may be outgoing calls routed from the wireless device to the PSTN through the short haul network edge device, a computer network and a PSTN gateway.
  • a wireless network such as a Mobile Switching Center or Home Location Register (HLR).
  • HLR Home Location Register
  • Another advantage of the present invention allows a wireless telephone to register with a database in the wireless network while the telephone is in communication with a short haul network, thereby allowing the wireless telephone to access the services available in the wireless network.
  • FIGURE 1 is a diagram of a system embodying the present invention
  • FIGURE 2 is a diagram of an alternative embodiment of the present invention.
  • FIGURE 3 illustrates messages that are exchange during an outgoing call from a wireless device using the present invention
  • FIGURE 4 illustrates messages that are exchanged during an incoming call to a wireless device using the present invention.
  • FIGURE 5 illustrates messages that are exchanged during an incoming call to a busy wireless device using the present invention.
  • FIG. 1 illustrates an exemplary embodiment of the present invention.
  • Wireless telephone 105 communicates through wireless link 109 with an antenna at base station 104. Such communication is well known in the art and is employed in cellular, PCS and other wireless networks throughout the world.
  • Base station 104 and other base stations (not shown) are connected to, and controlled by, MSC 103.
  • Wireless control network 106 links MSC 103 with other MSCs and other network components, such as MSC 102 and HLR 107. These network components communicate with each other and exchange information through wireless network 106 using, for example, messages defined in Interim Standard (IS) 41 or GSM MAP.
  • IS Interim Standard
  • the wireless network may be any wireless network, such as wireless telephony networks complying with the Global System for Mobile communications (GSM), Digital- Advanced Mobile Phone Service (DAMPS), Interim Standard (IS) 136, IS 95 standards; or any other Personal Communications Services (PCS) wireless network.
  • GSM Global System for Mobile communications
  • DAMPS Digital- Advanced Mobile Phone Service
  • IS Interim Standard
  • PCS Personal Communications Services
  • wireless network refers generally to typical infrastructure and components of a wireless network, such as base station 104, MSCs 102, 103, HLR
  • VLR Visitor Location Registers
  • Signaling Control Points message centers and the like.
  • Applications Processor 112 is connected to the wireless network though control network 106. Applications Processor 112 is also connected to VoIP Gateway 113.
  • Applications Processor 112 and VoIP Gateway 113 may appear as an MSC to the wireless network.
  • Applications Processor 112 functions as an interface by converting and reformatting messages between VoIP Gateway 113 and the wireless network.
  • Applications Processor 112 may convert IS-41 messages from Control Network 106 to IP messages that can be processed by VoIP Gateway 113.
  • VoIP Gateway 113 can also communicate with other devices through connections to PSTN 101 and Internet 111.
  • edge devices such as Web TV device 108
  • the term edge device in this context refers to a device on the edge or end of an IP network, Internet, Asynchronous Transfer Mode (ATM) network, Ethernet network or other legacy type of network.
  • the edge device can pass packets between the legacy network and other devices or networks.
  • Edge devices may include Internet appliances, Personal Computers (PCs), and the like.
  • edge device 108 may connect to other devices, such as portable computer 114, PDAs, wireless telephone 105, cordless telephones, other Internet appliances, and the like.
  • the short haul radio systems allow these devices to access the Internet or IP network through a wireless connection by establishing a piconet or other relatively short- range wireless network that allows the devices to share data.
  • the edge device communicates with one or more other devices via links 110.
  • wireless telephone 105 is equipped with a short haul radio capability, for example, the Bluetooth technology, in addition to the capability to communicate with a conventional wireless telephone network, such as a GSM, DAMPS or IS-95 network.
  • Wireless telephone 105 may also have the capability to communicate with future wireless networks, such a third generation networks or Enhanced Data Rates for GSM Environment (EDGE) networks.
  • EDGE Enhanced Data Rates for GSM Environment
  • the short haul or Blue tooth technology is integrated into wireless telephone 105 so that the handset can detect an edge device when it is within range.
  • wireless telephone 105 may detect inquiry protocol messages or access protocol messages from WebTV edge device 108 when the user is at home or near device 108.
  • wireless telephone 105 Prior to detection of an edge device, wireless telephone 105 is in communication with the wireless telephone network via link 109 to base station 104.
  • wireless telephone 105 powers down link 109 and establishes link 110 with edge device 108.
  • the order and timing in which link 109 is terminated and link 110 is established is pertinent to the present invention.
  • wireless telephone 105 may not be currently registered with the wireless network or control network 106 or wireless telephone 105 may not be in communication with base station 103 when edge device 108 is detected.
  • wireless device 105 may be roaming, searching for service, or in a building so that link 109 cannot be maintained due to range or environmental conditions; or wireless telephone 105 may be initializing after being turned on.
  • device 105 has been referred to as a wireless telephone in the present example, it will be understood by those skilled in the art that the present system and methods can also be applied to other wireless devices, such as modems, pagers, PDAs, and the like.
  • wireless telephone 105 When wireless telephone 105 powers down link 109 in favor of link 110, it has effectively de-registered from the wireless network. Therefore, the wireless network does not have information on how to route calls to wireless telephone 105.
  • Edge device 108 is equipped with short haul radio capability and communicates with wireless device 105 to authorize and establish a valid connection. Once connection 110 is established, a signal is sent from edge device 108 to application processor 112, which recognizes the existence of an authorized wireless telephone.
  • Applications processor 112 causes registration messages to be sent through switch control network 106 to HLR 107 and re-registers wireless telephone 105 with the wireless network as described in U.S. Patent No. 5,978,672.
  • Application Processor 112 and VoIP Gateway 113 may appear as an MSC to HLR 107 and the wireless network during this registration process. Calls to wireless telephone 105 can be completed once the device has reregistered via Applications Processor 112.
  • VoIP Gateway 113 sends the call to wireless telephone 105 through Internet 111 and edge device 108.
  • the call may be set up using techniques described in pending U.S. patent application serial number 09/154,977, entitled DATA NETWORK COMPUTING DEVICE CALL PROCESSING, filed September 17, 1998, the disclosure of which is hereby incorporated by reference herein.
  • Calls initiated by wireless telephone 105 are transmitted through VoIP Gateway 113 to PSTN network 101. If the mobile dials a normal PSTN call, the call may be routed directly to PSTN 101 from VoIP Gateway 113. If the dialed digits represent something other than a call origination message or telephone number, then VoIP Gateway 113 and Applications Processor 112 will decode the dialed digits and formulate a suitable message for control network 106. For example, if the dialed digits correspond to a feature request, VoIP 113 and Applications Processor 112 recognize the feature request message, convert the message from the IP format received via Internet 111 to an IS-41 format, and route it to the correct wireless network element or node via control network 106 for processing. Any response to the feature request message or returned values from the wireless network can be interpreted by Application Processor 112 and the requested feature or call processing service can be implemented.
  • edge device 108 is connected by a link
  • MSC 103 may implement the logic contained in Application
  • Processor 112 and VoIP Gateway 113 to register wireless telephone 105 on the short haul network and to route calls to and from device 105.
  • the edge device has been illustrated in Figure 1 as WebTV device 108, other Internet appliances in the home, business or other establishment may be used.
  • the edge device can be any computer or data device on any computer network including enterprise networks.
  • the use of the short haul radio detection allows wireless users to be detected when they are near an edge device. This enhances existing wireless networks by allowing positive control over the "in office” or "out of office” states defined in the 5,978,672 patent.
  • the mobile When the mobile is close to the edge device, the mobile will register using the short haul radio system.
  • the device is registered on the wireless network HLR as "in office" or "at home” as appropriate and calls can be rerouted by the application processor to an office telephone or home telephone. If the wireless telephone is away from the edge device, the application processor can reroute calls that are directed to an office telephone to the wireless device.
  • Figure 2 illustrates a system in which the present invention can be used to route calls to the appropriate wireless or wireline telephone or other device.
  • the subscriber has a wireless telephone 201, which travels with the subscriber from home (201a), to work (201b) and to other places within a home or roaming wireless network (201c).
  • Wireless network 202 may be the subscriber's home network or a roaming network.
  • the subscriber's telephone 201c communicates with wireless network 202 through base stations 203 and 204 and MSC 205 using well known methods.
  • a database in HLR 206 tracks the current location of wireless device 201c so that incoming calls to telephone 201c can be routed to the currently serving MSC 205.
  • calls may also be routed to other wireless subscribers (not shown) via wireless network 202 or to other devices via Internet 208.
  • Wireless device 201 may receive voice or data calls. Voice calls may be routed over Internet 208 using VoIP technology.
  • Applications Processor/Gateway Server 209 functions as an interface between wireless network 202 and other computer networks.
  • a short haul radio capable edge device such as WebTV 210.
  • WebTV 210 edge device and wireless telephone 201a detect each other.
  • wireless telephone 201a powers down its link with wireless network 202 and re-registers with the wireless network through edge device 210, as described above.
  • Applications Processor/Gateway 209 receives a message of this registration from the edge device that is directly communicating to telephone 201 and translates this message into a normal wireless registration message expected by HLR 206.
  • the HLR then up dates its location information such that the mobile is now registered to Gateway Server 209.
  • Applications Processor/Gateway 209 will function as an MSC in relation to the wireless network for this feature and the current Internet 208 location of wireless device 201 or the edge device serving 201 may be maintained in a database in Processor 209 allowing it to act as the HLR for the mobile in the Internet 208.
  • the logic and functionality of Applications Processor/Gateway 209 may be incorporated into some other wireless network node or device.
  • calls to wireless telephone 201a may be routed in different ways.
  • calls to wireless device 201 are routed via Internet 207 and the short haul network directly to telephone 201a.
  • calls to telephone 201 may be routed to fixed wireline telephone 211 instead of to wireless device 201a.
  • the actual call routing selection may be based upon network demands and capabilities or upon a user configured profile. For example, if edge device 210 is unable to stream voice packets to wireless telephone 201a or if traffic Internet 208 is congested or unreliable, then calls may be redirected to telephone 211.
  • HLR 206 or Processor 209 may maintain a user profile that directs wireless calls to home telephone 211 when device 201a is registered on the short haul network.
  • the subscriber's office or work place may also employ a short haul radio system.
  • An edge device such as PC 212, is in communication with other devices over the office- based short haul radio system.
  • edge device 212 and telephone 201b detect each other. Again, as described above, wireless telephone 201b shuts down any existing connections with wireless network 202 and establishes a connection to the office short haul network.
  • wireless device de-registers the original wireless link with wireless network 202, if necessary, and re-registers with network 202 through Applications Processor/Gateway Server 209.
  • calls to wireless device 201 may be routed to telephone 201b through the office short haul network via device 212 and Internet 208.
  • telephone 201b is registered with the office short haul network, calls to the telephone number for device 201 may be routed to office telephone 213.
  • wireless device 201c When wireless device 201c leaves the home or office (or moves too far from edge device 210 or 212), the connection between device 201 and the short haul network is broken. Unless wireless telephone 201c detects another short haul network, it begins to search for standard wireless network 202 in the normal manner. When a connection to wireless network 202 is reestablished, HLR 206 and/or Processor 209 update wireless telephone 201c's current location. Future calls to device 201 's telephone number will then be routed to wireless telephone 201c via the wireless network.
  • wireless device 201 can arbitrarily shut down the connection in favor of the other. Alternatively, it can conduct a courtesy switchover whereby the existing connection is maintained until the connection is terminated by the user or data application in the case of data transmission. After the connection is terminated and before another is initiated, wireless device 201 connects to the preferred network. In yet another embodiment, the connection can be switched or handed off to the other network without disconnection.
  • the present invention will also be operable with a short haul network that uses Infrared signaling to maintain voice or data connections between devices.
  • the wireless device can be equipped with appropriate Infrared capabilities to communicate with the system.
  • Internet also includes private packet networks, or public packet networks specifically designed for voice transmission.
  • a series of edge devices can be arranged to provide effective coverage to a larger area than that of a single short haul radio receiver.
  • the wireless device will connect to the closest short haul receiver. If the wireless device moves to another receiver's coverage area, the communications will be switched over to the second receiver using techniques well known in the art of wireless handoffs. It will be understood that such handoffs may be accomplished between different types of short haul networks, such as a HomeRF to Bluetooth or Bluetooth to Infrared handoff, depending only upon the systems incorporated into the wireless device.
  • the application processor can be configured to track the location of the wireless device based upon the active edge device. Furthermore, the applications processor maybe configured to deliver services or information to the user based on the wireless devices current location. Current user location information may also be provided to other entities and third parties.
  • the edge device and the wireless device can be configured to only notify each other of their presence.
  • the wireless telephone does not power down from the wireless network, but simply sends a reference notification to the edge device.
  • This can be forwarded to the applications processor or the wireless network to serve as a specific location detection.
  • This would allow the application processor or other device to deliver services or information to the wireless telephone via the normal wireless network.
  • short haul radio edge devices can be placed along roads, sidewalks, or in shopping malls.
  • location-specific services and info ⁇ nation such as local traffic information or sales information, can be provided directly to the mobile.
  • This information may be sent as a voice call, such as a prerecorded message, or a Short Message Service (SMS) text message that is displayed to the user on the wireless telephone.
  • SMS Short Message Service
  • FIG 3 illustrates the messages that may be exchanged in the system of Figure 1 to set up an outgoing voice call from wireless device 105 via the short haul network.
  • Wireless telephone 105 first establishes a connection with edge device 108 using the appropriate short haul network protocol messages 301.
  • Edge device 108 converts the setup messages and routes the messages 302 to VoIP Gateway 113 over the Internet or packet network.
  • VoIP Gateway 113 then converts the messages as necessary and routes the setup messages 303 either to PSTN 101 or to the wireless network through Applications Processor 112.
  • message 302 is sent in a packet format across the Internet.
  • the format of message 303 may be an IS-41 format to be routed to the wireless network or an INAP format to be routed to the PSTN.
  • the voice call 304 is routed from wireless telephone 105 to the called destination via edge device 108 and VoIP Gateway 113.
  • FIG. 4 illustrates messages exchanged to establish an incoming call to wireless device 105 in the present invention.
  • Wireless telephone 105 detects edge device 108, the short haul radio system, and registers on the short haul network with messages 401.
  • Edge device 108 sends registration message 402 to Applications Processor 112 in a TCP/IP format via Internet 111 or via another computer network.
  • Application Processor 112 sends message 403 to HLR 107 and updates the registration information for device 105.
  • the MIN for wireless telephone 105 is assigned to a particular service provider's wireless network or MSC 102.
  • call setup messages are directed to the home wireless network to request routing instructions.
  • the device's home network is queried for routing information no matter where telephone 105 is actually located.
  • incoming call 404 for device 105 is first routed to home MSC 102, which queries HLR 107 (by message 405) for routing information. Since HLR 107 knows that wireless 105 telephone is currently registered on a short haul network, HLR 107 sends location request message 406 to Applications Processor 112. In response, Applications Processor 112 returns location request response 408 to HLR 107 and sends resource setup message 407 to VoIP Gateway 113.
  • the location request return result message 408 includes a Temporary Local
  • TLDN Directory Number
  • MSC 102 uses this information to complete a call connection to telephone 105 for call 404.
  • the voice call is routed from MSC 102 to VoIP Gateway 113 as connection
  • Message 410 includes the previously selected TLDN, which is used by VoIP Gateway 113 to route the call to the correct wireless telephone.
  • VoIP Gateway 113 converts the incoming voice call 410 to packet data 411 that is routed to edge device 108, which then converts the packets to the short haul radio format and sends it to telephone 105 in wireless message 412.
  • FIG. 5 illustrates messages that are exchanged in the present system when the called wireless telephone is busy.
  • wireless telephone 105 When wireless telephone 105 is active on the short haul network, all calls or other communications will be routed through a VoIP Gateway, such as 113. Therefore, whenever wireless telephone 105 is on a voice call, such as an incoming or outgoing telephone call, or on a data call, such as an Internet access connection, VoIP 113 is used in the connection (501) and will be aware that wireless telephone 105 is busy. Alternatively, if VoIP Gateway 113 is not directly part of the voice or data connection, wireless device 105 may send a message 501 to VoIP Gateway 113 to indicate a busy state.
  • Incoming calls 502 like incoming call 404, are routed to the home MSC 102 for the wireless telephone's MIN. MSC 102 sends route request message 503 to HLR 107. Knowing that wireless telephone 105 is registered on the short haul network, HLR 107 in turn sends location request 504 to Applications Server 112, which sends resource setup message 505 to VoIP Gateway 113. Since VoIP Gateway 113 is aware that telephone 105 is busy, it returns device-busy setup return message 506.
  • Messages 503, 504, 505 basically correspond to messages 405, 406, 407, respectively, from the previous example in Figure 4.
  • MSC 102, HLR 107 and Applications Server 112 do not know if wireless device is currently free or busy. Therefore, incoming calls to wireless telephone 105 are setup as normal until they reach a device, such as VoIP Gateway 113 in this example, that knows whether device 105 is busy.
  • MSC 102, HLR 107 or Applications Server 112 may monitor the current busy status of wireless telephone 105 and one of these components may return a device-busy message.
  • Applications Server 112 sends location request redirection message 507 to HLR 107 to indicate that wireless telephone 105 is not available to accept the call.
  • HLR 107 determines whether the incoming call should be redirected to some other destination, such as another telephone number, a voice mail system, or the like, and returns route request return message 508 to home MSC 102 with a redirection number for the appropriate destination. MSC 102 then completes the call connection to the destination and establishes a voice circuit 509 to the alternate destination for incoming call 502.
  • VoIP 113 may send a call waiting message 510 to wireless telephone 105 to notify the user of a second call.
  • Message 510 may include CLID information to indicate who is waiting on the second call.
  • message 511 is returned to VoIP Gateway 113 indicating the second call should be connected to telephone 105. Following receipt of message 511, VoIP Gateway 113 causes a call connection to be completed as described above for messages 408 to 412.
  • VoIP Gateway will return busy message 506 to Applications Server 112 indicating that the user is not available and the call will either be redirected or the caller will receive a busy indication.

Abstract

L'invention concerne un système permettant à des dispositifs sans fil, tels que des téléphones mobiles, des récepteurs d'appel de personnes et des ordinateurs de poche équipés de moyens radio courte distance en plus des fréquences cellulaires normales ou PCS, de se connecter, de lancer et de recevoir des appels par un réseau informatique ou l'Internet. Les systèmes radio courte distance peuvent utiliser les protocoles « Bluetooth » ou « HomeRF ». Quand le dispositif sans fil se situe dans la plage d'un commutateur d'accès du réseau courte distance, le dispositif sans fil détecte la présence du commutateur d'accès et passe à des fréquences utilisées par le système à courte distance. Le commutateur d'accès convertit les signaux provenant du système radio courte distance en un format compatible avec le réseau informatique. Un processeur d'application du réseau informatique sert d'interface au réseau de signalisation et de commande sans fil pour permettre au mobile de se connecter au réseau sans fil. Les appels entrants vers le mobile sont ensuite sous la commande du processeur d'application, qui déclenche un routage de ces appels vers le commutateur d'accès par une passerelle associée. Les appels sortants sont routés par le commutateur d'accès vers la passerelle dans le RTPC.
EP01914703A 2000-03-06 2001-03-06 Communications sans fil par voie hertzienne courte distance Withdrawn EP1228604A2 (fr)

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US51967700A 2000-03-06 2000-03-06
US519677 2000-03-06
PCT/US2001/007109 WO2001067684A2 (fr) 2000-03-06 2001-03-06 Communications sans fil par voie hertzienne courte distance

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WO2001067684A2 (fr) 2001-09-13
WO2001067684A3 (fr) 2002-06-13

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