WO2008011825A1 - Procédé de prestation de service en temps réel et système à interaction d'insertion d'hyperfréquence globale - Google Patents

Procédé de prestation de service en temps réel et système à interaction d'insertion d'hyperfréquence globale Download PDF

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Publication number
WO2008011825A1
WO2008011825A1 PCT/CN2007/070293 CN2007070293W WO2008011825A1 WO 2008011825 A1 WO2008011825 A1 WO 2008011825A1 CN 2007070293 W CN2007070293 W CN 2007070293W WO 2008011825 A1 WO2008011825 A1 WO 2008011825A1
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WIPO (PCT)
Prior art keywords
access device
fixed
terminal
real
time service
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PCT/CN2007/070293
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English (en)
Chinese (zh)
Inventor
Jianhua Yu
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Huawei Technologies Co., Ltd.
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Publication of WO2008011825A1 publication Critical patent/WO2008011825A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/04—Network layer protocols, e.g. mobile IP [Internet Protocol]

Definitions

  • the present invention relates to a broadband wireless access network technology, and more particularly to a method for realizing real-time services in a global microwave access interoperability system, a method for implementing roaming services in a global microwave access interoperability system, and a method A global microwave access interoperability system, and a fixed access device.
  • broadband wireless access systems are characterized by high spectrum utilization, low radiation, and low cost. Therefore, broadband wireless access technology is considered by the industry to be the technology of choice for next-generation wireless communications.
  • WiMAX Worldwide Worldwide Interoperability for Microwave Access
  • WiMAX networks are networked separately or integrated with existing networks. At present, it is more promising, and the second way is to study more.
  • FIG 1 shows a typical WiMAX network in the prior art.
  • the network adopts a separate networking mode and provides mobile roaming services using Mobile IP Protocol (MIP).
  • MIP Mobile IP Protocol
  • MIP is a network layer mobility management protocol. It introduces two new functional entities and tunneling technologies, such as Home Agent (HA) and Foreign Agent (FA), without changing the Internet (Internet) routing rules. Under the premise, the routing problem when the mobile node roams is solved.
  • HA Home Agent
  • FA Foreign Agent
  • the network shown in Figure 1 is mainly composed of a terminal (MS, Mobile Station), an access service network (ASN, Access Service Network), and a connection service network (CSN, Connect Service). Network ) and the Internet.
  • the ASN is composed of a base station (ASN-BS) and an access service gateway (ASN-GW), and provides a physical layer and a media access control (MAC) function of the 802.16, and also serves as a FA of the protocol.
  • There are two ASNs in the network one roaming network in the MS, providing the Internet access service of the roaming place to the MS; and another home network in the MS providing the Internet access service of the home.
  • the MS supports the IP/MIP protocol and the 802.16 protocol, and accesses the base station through the 802.16 air interface, and the base station is connected to the ASN-GW through the local area network.
  • the MS obtains a home address (HoA) from the HA, and when the MS roams from the foreign agent FA1 to the foreign agent FA2, obtains a care-of address (CoA) from the FA2, and registers with the HA by the CoA, thereby binding.
  • the HoA and CoA of the MS establish a tunnel between the HA and the FA or the HA and the MS. This is the MIP registration process.
  • the CSN is sent as the default router directly; and since all IP packets destined for the MS must be filtered by the firewall of the MS home network, the MS receives the data through three-way routing: the home CSN receives the MS to the MS.
  • the data packet is forwarded to the foreign CSN or ASN through the MIP tunnel, and then forwarded to the MS by the foreign CSN or ASN.
  • the existing fixed communication network resources are not fully utilized, resulting in high network construction cost and difficulty. Due to the small coverage of the WiMAX network, it is impossible to separately set up a wide-area coverage network like the Global System of Mobile Communication (GSM). Therefore, it is necessary to integrate the network with the existing network, especially with existing ones.
  • the fixed communication network resources are converged in the networking to reduce the cost and difficulty of network construction, and the above existing networking methods do not fully utilize the existing fixed communication network resources.
  • embodiments of the present invention provide a method for implementing real-time services in a WiMAX network to implement an IP voice service that provides carrier-grade QoS in a WiMAX network.
  • a method for implementing a real-time service in a WiMAX network system where the WiMAX network system includes a wireless access device, a fixed access device, and a fixed switching device, the method includes:
  • the wireless access device separates the real-time service data from the user data from the first terminal, and sends the real-time service data to the fixed access device;
  • the fixed access device performs media conversion on the real-time service data, and sends the data to the fixed switching device;
  • Embodiments of the present invention also provide a method for implementing a roaming service in a WiMAX network to implement roaming in a WiMAX network.
  • a method for implementing a roaming service in a WiMAX network system where the WiMAX network system includes a wireless access device, a fixed access device, and a solid The switching device, the method includes:
  • the wireless access device separates data service data from the roaming terminal from real-time service data
  • the wireless access device, the fixed access device access, and the fixed switching device provide real-time services for the roaming terminal.
  • the embodiment of the present invention also proposes a WiMAX network system to fully utilize the resources of the existing fixed communication network to construct a WiMAX network, thereby reducing the construction cost and difficulty of the WiMAX network.
  • a WiMAX network system provided by an embodiment of the present invention includes: a radio access device, a fixed access device and a fixed switching device in a fixed communication network;
  • the wireless access device is configured to separate real-time service data from user data from the first terminal, send the real-time service data to the fixed access device, and receive the real-time service from the fixed access device.
  • the fixed access device is configured to perform media conversion on real-time service data transmitted between the wireless access device and the fixed switching device;
  • the fixed switching device is configured to send real-time service data from the fixed access device to the corresponding second terminal through the fixed communication network, and send the real-time service data from the second terminal to the corresponding fixed access device.
  • the embodiment of the invention further provides a fixed access device, so as to fully utilize the resources of the existing fixed communication network to construct a WiMAX network, and reduce the construction cost and difficulty of the WiMAX network.
  • a communication module configured to send real-time service data from the wireless access device to the protocol conversion adaptation module, and send the real-time service data processed by the protocol conversion adaptation module to a fixed switching device; and configured to send the real-time service data from the fixed switching device to the protocol conversion adaptation module, and send the real-time service data processed by the protocol conversion adaptation module to the wireless access device;
  • a protocol conversion adaptation module that includes a media conversion unit, configured to perform media conversion on real-time service data between the wireless access device and the fixed switching device.
  • the WiMAX network system transmits the real-time service data of the user through the wireless access device, the fixed access device, and the fixed switching device, and fully utilizes the existing fixed communication network resources.
  • the wireless access operator can share rich fixed communication network resources, including fixed switching equipment resources, access equipment resources, transmission resources, and service resources, thereby reducing the cost and difficulty of network construction.
  • the real-time service data is separated from the user data by the wireless access device on the basis of the original WiMAX network, and the real-time service is sent to the fixed switching device through the fixed access device, and then the fixed communication is performed.
  • the network handles it.
  • the real-time service transmission has high-quality QoS, thereby realizing the purpose of providing carrier-grade IP voice service in the broadband wireless access network.
  • the data service data and the real-time service data of the roaming terminal are separated by the wireless access device by using the wireless access device on the WiMAX network that uses the MIP to implement roaming, and the wireless access device, the fixed access device, and the fixed switching device are
  • the roaming terminal provides a real-time service, and provides a data service for the roaming terminal through the three-side routing of the mobile IP, thereby providing a new roaming mode for the real-time service, and realizing the roaming of the data service and the real-time service respectively;
  • the coverage has been expanded through inter-network roaming, which has made up for the lack of coverage of 802.16, enabling operators to quickly launch services.
  • FIG. 1 is a schematic diagram of a network structure of a separate networking of a WiMAX network in the prior art.
  • FIG. 2 is a schematic structural diagram of a WiMAX network system according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a signaling processing process for implementing an IP voice service by using the network system shown in FIG. 2 according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of an uplink voice processing process for implementing an IP voice service by using the network system shown in FIG. 2 according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a downlink voice processing process for implementing an IP voice service by using the network system shown in FIG. 2 according to an embodiment of the present invention.
  • the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
  • the real-time service data of the user is transmitted through the wireless access device in the WiMAX network, the fixed access device in the fixed communication network, and the fixed switching device, thereby realizing the full use of the existing
  • the resources of fixed communication networks to build WiMAX networks reduce the construction cost and difficulty of WiMAX networks.
  • VoIP services with carrier-grade QoS are provided in the broadband wireless access network, and the coverage of the WiMAX network is expanded through inter-network roaming.
  • the following is an example of a wireless access device in a WiMAX network, a CSN, and a fixed switching device in a fixed communication network, a local exchange (LE), and a fixed access device, an access network (AN). Specific embodiments of the technical solutions provided are described.
  • the WiMAX network system includes: LE210, a foreign network 220, a home network 230, a terminal 240, and the like.
  • the foreign network 220 includes: an AN 221, a CSN 222, an ASN-GW 223, and a base station 224.
  • the home network 230 includes: an AN 231, a CSN 232, an ASN-GW 233, a base station 234, and a firewall/router 235.
  • the local exchange LE 210 communicates with each AN to establish a connection between the terminal and the terminal through the fixed communication network.
  • the fixed communication network may include a circuit switched network such as a Public Switched Telephone Network (PSTN) or a Public Land Mobile Network (PLMN).
  • PSTN Public Switched Telephone Network
  • PLMN Public Land Mobile Network
  • the AN 221 in the foreign network is connected to the CSN 222 in the foreign network, and the CSN 222 is connected to the LE 210 through the V5.2 interface; the AN 231 in the home network is connected to the CSN 232 in the home network, and is connected through the V5.2 interface.
  • the CSN 232 is connected to the LE 210.
  • the AN 221 in the foreign network and the AN 231 in the home network are used to perform signaling message conversion, address translation, and media conversion between the CSN and the LE.
  • the CSN 222 in the foreign network communicates with the ASN-GW 223 in the foreign network, and accesses the LE 210 through the V5.2 interface through the AN 221 in the foreign network; the CSN 232 in the home network and the ASN-GW 233 in the home network Communication, and access to the LE 210 via the home network AN 231 with a V5.2 interface.
  • the CSN 222 in the foreign network and the CSN 232 in the home network are used to separate real-time service data and data service data of the user, and send the real-time service data of the user to the AN.
  • the CSN 232 in the home network can be used to implement the functions of the HA, and the ASN-GW 223 in the foreign network and the ASN-GW 233 in the home network can be used to implement the FA function.
  • the network system adds AN and LE on the cornerstone of the original WiMAX network.
  • the CSN separates the user's real-time service data, and transmits the user's real-time service data through AN and LE.
  • the connection relationship of other parts is shown in Figure 1.
  • the prior art network system shown remains unchanged.
  • the AN of the WiMAX network system includes a protocol conversion adaptation module and a communication module.
  • the protocol conversion adaptation module is used to implement mutual conversion of WiMAX network protocol messages to fixed communication network protocol messages.
  • the protocol conversion adaptation module includes the following functions:
  • the conversion to V5.2 protocol message is sent to the LE; the V5.2 protocol message from the LE is converted to an H.323 or SIP protocol message and sent to the CSN.
  • the communication module is configured to send the signaling message from the wireless access device to the protocol conversion adaptation module, and send the signaling message processed by the protocol conversion adaptation module to the fixed switching device;
  • the signaling message of the fixed switching device is sent to the protocol conversion adaptation module, and the signaling message processed by the protocol conversion adaptation module is sent to the wireless access device.
  • the communication module is configured to send an address from the wireless access device to the protocol conversion adaptation module, and send the address processed by the protocol conversion adaptation module to the fixed switching device; and used to be from the fixed exchange
  • the address of the device is sent to the protocol conversion adaptation module, and the address processed by the protocol conversion adaptation module is sent to the wireless access device;
  • the IP packet from the CSN is converted into 64 kbit/s PCM (Pulse Code Modulation) voice to the LE; the 64 kbit/s PCM voice from the LE is converted into an IP packet and sent to the CSN.
  • the communication module is configured to send real-time service data from the wireless access device to the protocol conversion adaptation module, and send the real-time service data processed by the protocol conversion adaptation module to the fixed switching device;
  • the real-time service data from the fixed switching device is sent to the protocol conversion adaptation module, and the real-time service data processed by the protocol conversion adaptation module is sent to the wireless access device.
  • the protocol conversion adaptation module can be divided into three units: a signaling message conversion unit, an address conversion unit and a media conversion unit, which are respectively used to perform the above three functions.
  • the LE in the WiMAX network system of the embodiment of the present invention can be registered according to the MIP, and obtain the AN number currently accessed by the MS.
  • the implementation of this feature is:
  • the HA modifies the correspondence between the CoA and the AN number, or the HA forwards the location update message to the LE, and the LE modifies the correspondence between the CoA and the AN number;
  • the LE can search for the correspondence between the CoA and the AN number according to the CoA, and obtain the AN number currently accessed by the MS.
  • the LE can identify the MS by the L3 address and can combine the accounting information of the same MS.
  • the charging process is as follows: Before and after roaming, the MS accesses the LE through different ANs; the LE identifies the MS through the L3 address and the location update message of the MS, and combines the call original records (CDRs) to implement charging.
  • the LE can also cooperate with the AAA server to bundle the data service and voice service of the MS.
  • the charging module can be set in the LE to implement the above charging function.
  • the above is a description of the structure of the WiMAX network system in the embodiment of the present invention.
  • the user data of the user is separated by the CSN, and the real-time service data of the user is sent to the LE through the AN in the fixed communication network, and finally transmitted by the LE to the user of the communication peer through the fixed communication network.
  • the existing fixed communication network resources are fully utilized to form a WiMAX network, so that the wireless access operators can share rich fixed communication network resources, thereby reducing the cost and difficulty of network construction.
  • the real-time services in communication include IP voice services and IP video telephony services.
  • IP voice services include IP voice services and IP video telephony services.
  • IP video telephony services include IP voice services and IP video telephony services.
  • the data service of the roaming MS user is still provided through the three-way routing of the MIP, and the IP voice service is processed by the CSN, AN and LE.
  • FIG. 3 is a schematic diagram of a signaling processing process for implementing an IP voice service by using the network system shown in FIG. 2 according to an embodiment of the present invention. Referring to Figure 3, the process includes a calling process and a called process.
  • the calling process includes the following steps:
  • Step 311 The calling MS stores the dialing information and picks up the phone, establishes a wireless connection with the ASN, and the ASN allocates the wireless channel resource to the calling MS.
  • Step 312 The calling MS obtains an IP connection service from the CSN through the ASN, and the CSN allocates the ground transmission resource to the MS.
  • Step 313 The CSN initiates a session call to the AN.
  • the CSN can initiate a session call to the AN through H.323 or SIP call signaling.
  • Step 314 The AN converts the call signaling into a V5.2 off-hook (ESABLISH) message and sends it to the LE.
  • ESABLISH V5.2 off-hook
  • Step 315 The LE allocates a time slot channel on the switch. After the allocation is successful, the sequence passes through The AN, CSN, and ASN send a dial tone (DIAL TONE) to the calling MS, indicating that the dialing can be dialed.
  • Step 316 The calling MS sends the pre-stored dialing information to the LE through ASN, CSN, and AN.
  • the dialing information is preferably dual tone multi-frequency (DTMF), because the DTMF information can be transmitted through the voice channel; and if the dialing information is a digital signal, the dialing information needs to be converted into an audio signal in the AN. Send to LE.
  • DTMF dual tone multi-frequency
  • Step 317 The LE analyzes the number, selects a route to send the call signal to the PSTN or PLMN, and finally sends it to the called MS.
  • Step 318 The called MS rings, and the LE sends a ringback tone (ALERTING) to the calling MS.
  • the ringback tone passes through the AN, the CSN, the ASN, and finally reaches the calling MS.
  • Step 319 The called MS picks up the phone, and the LE sends a connection message (CONNECT) to the calling MS. At this point, a call connection is established.
  • CONNECT connection message
  • the called process includes the following steps:
  • Step 321 The remote user (ie, the calling MS) calls the local MS, and the HA sends the paging message to the LE. After the slot channel on the LE distribution switch succeeds, step 322 is performed.
  • Step 322 The LE obtains the current access of the called MS according to the CoA registered by the called MS.
  • the LE can obtain the AN number currently accessed by the called MS according to the correspondence between the CoA and the AN number.
  • Step 323 The AN sends a paging message (PAGING) to the called MS.
  • PAGING paging message
  • Step 324 The called MS sends a paging response (PAGING ACK) to the AN.
  • PAGING ACK paging response
  • Step 325 The called MS establishes a wireless connection with the ASN, and the ASN allocates a wireless channel resource to the called MS.
  • Step 326 The called MS obtains an IP connection service from the CSN through the ASN, and the CSN allocates a terrestrial transmission resource to the MS.
  • Step 327 The AN converts the paging response signaling (PAGING ACK) received from the called MS into a V5.2 ringing (ALERTING) message, sends it to the LE, and the called MS rings.
  • PAGING ACK paging response signaling
  • ALERTING V5.2 ringing
  • Step 328 The called MS picks up the phone, sends a connection message (CONNECT) to the LE through the AN, and establishes a call connection.
  • CONNECT connection message
  • FIG. 4 is a schematic diagram of an uplink voice processing process for implementing an IP voice service by using the network system shown in FIG. 2 in the embodiment of the present invention. Referring to Figure 4, the process includes the following steps:
  • Step 401 The ASN sends the user data packet to the CSN.
  • the MS sends the user data packet (including the HoA and the user data) to the base station through 802.16; the base station completes the convergence sub-layer (CS) processing of the user data, obtains an IP packet containing the user data, and then obtains the obtained IP packet.
  • the IP packet is sent to the ASN-GW through the internal data channel (DP) of the ASN; the ASN-GW adds the IP packet to the Generic Routing Encapsulation (GRE) to become a CoA IP packet and sends it to the CSN.
  • GRE Generic Routing Encapsulation
  • Step 402 The CSN restores the CoAIP packet to an IP packet, and separates the voice service data from the voice packet, and sends the voice service data of the tens of thousands of voices to the AN.
  • voice service data, data service data, and signaling are transmitted on different air channels in the physical layer of the air interface, respectively, but in the case of the ground transmission line passing through the ASN to the CSN, the mixing is transmitted in the same transmission line.
  • voice service data, data service data, and signaling are uniformly encapsulated and transmitted in an IP packet through a LAN.
  • Both ASN and CSN have the ability to restore logical channels from IP packets. For example, by physically separating, configuring an IP address for the data service processing board and another IP address for the voice service processing board, the voice service data and the data service data are easily separated.
  • the method for separating the voice service data, the data service data, and the signaling by the CSN is distinguished according to the difference of the wireless channels. For example, when the MS sends voice service data or data service data, the data of different service types is automatically sent through different types of physical channels.
  • the base station receives the data, it also receives the voice according to different wireless channel types. Data and data business data are distinguished.
  • Step 403 After the AN solves the payload in the IP packet, it restores the PCM voice into 64 kbit/s, puts it on the time slot channel of E1, and transmits it to the LE through the V5.2 protocol.
  • Step 404 The LE sends the 64 kbit/s PCM voice to the circuit switching network such as PSTN, PLMN, and finally to the other MS.
  • the circuit switching network such as PSTN, PLMN, and finally to the other MS.
  • FIG. 5 is a schematic diagram of a downlink voice processing process for implementing an IP voice service by using the network system shown in FIG. 2 in the embodiment of the present invention. Referring to Figure 5, the process includes the following steps:
  • Step 501 The LE receives 64 kbit/s PCM voice sent to the MS of the local network from a circuit switched network such as PSTN or PLMN.
  • Step 502 The LE puts the voice on the time slot channel of E1 and transmits it to the AN through the V5.2 protocol.
  • Step 503 The AN converts 64 kbit/s PCM voice into an IP voice packet and sends it to the CSN.
  • Step 504 The CSN sends the user data to the ASN.
  • the ASN-GW decapsulates the CoA IP packet and sends it to the base station through the ASN's internal data channel (DP); the base station transmits the data to the MS through 802.16.
  • DP ASN's internal data channel
  • Detach can be sent actively; however, when leaving the network coverage area, Detach will not be actively sent, which will cause paging failure.
  • the ASN-GW notifies the LE to remove the MS from the paging area. Remove to improve efficiency.
  • the foregoing is a description of a specific implementation method for providing an IP voice service in a WiMAX network system according to an embodiment of the present invention.
  • the method separates real-time service data from user data by a CSN on an original WiMAX network basis, and the real-time service data is The service data is sent to the fixed switching device through the fixed access device, and then processed through the fixed communication network, thereby realizing the provision of the IP voice service in the WiMAX network.
  • the AN and the LE are devices in the fixed communication network, the circuit switching is used for voice transmission. Therefore, the IP voice service provided by the method of the embodiment of the present invention has high quality QoS, and is provided in the broadband wireless access network. The purpose of carrier-grade IP voice services.
  • the data service of the roaming MS user is still provided by the three-way routing of the MIP, and the voice service of the user is separated by the AN and the LE after being separated by the CSN, thus providing a voice service.
  • a new roaming method realizes roaming of data services and real-time services separately. And through the inter-network roaming to expand the coverage, to make up for the 802.16 coverage, so that operators can quickly carry out services.

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  • Computer Networks & Wireless Communication (AREA)
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  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé de prestation de service en temps réel dans un système de réseau à interaction d'insertion d'hyperfréquence globale (WiMAX). Le système WiMAX comprend un dispositif d'accès sans fil, un dispositif d'accès fixe et un dispositif d'échange fixe. Selon ledit procédé, le dispositif d'accès sans fil sépare les données de service en temps réel des données d'utilisateur du premier terminal et les transmet au dispositif d'accès fixe qui convertit les données de service en temps réel par conversion de support et les transmet au dispositif d'échange fixe, lequel dispositif d'échange fixe transmet les données de service en temps réel au second terminal sur le réseau de communication fixe. Cette invention concerne également un procédé permettant de mettre en oeuvre un service d'itinérance dans un système WiMAX, un système de réseau WiMAX et un dispositif d'accès fixe. Cette invention permet de réduire le coût et la difficulté de la construction du réseau, de fournir un service de voix sur IP (VoIP) d'une qualité de service niveau télécommunication dans un réseau d'accès à large bande sans fil et d'agrandir la zone de chevauchement WiMAX grâce à l'itinérance entre les réseaux.
PCT/CN2007/070293 2006-07-17 2007-07-13 Procédé de prestation de service en temps réel et système à interaction d'insertion d'hyperfréquence globale WO2008011825A1 (fr)

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