WO2012126331A1 - Procédé et système de transfert de données - Google Patents

Procédé et système de transfert de données Download PDF

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Publication number
WO2012126331A1
WO2012126331A1 PCT/CN2012/072387 CN2012072387W WO2012126331A1 WO 2012126331 A1 WO2012126331 A1 WO 2012126331A1 CN 2012072387 W CN2012072387 W CN 2012072387W WO 2012126331 A1 WO2012126331 A1 WO 2012126331A1
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Prior art keywords
access network
network element
address information
information
identifier
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PCT/CN2012/072387
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English (en)
Chinese (zh)
Inventor
邓云
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ZTE Corp
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ZTE Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/22—Interfaces between hierarchically similar devices between access point controllers

Definitions

  • FIG. 1 is a schematic diagram of a 3GPP access system architecture according to the related art.
  • an architectural diagram of a 3GPP access system includes a radio access network part and a core network part, wherein the radio access network part includes GSM EDGE.
  • GERAN GSM EDGE Radio Access Network
  • UMTS Universal Mobile Telecommunications System
  • LTE Long-Term Evolution
  • both the access network of the GERAN and the UMTS are connected to the Serving General Packet Radio Service Supporting Node (SGSN) of the core network element service, and the mobility of the LTE access network and the core network element
  • the management entity Mobility Management Entity, MME for short
  • the RANTS includes a Base Station Subsystem (BSS), and includes a Base Station Controller (BSC) and a Base Station (BS).
  • the UMTS access network element includes a wireless network.
  • the controller Radio Network Controller, RNC for short
  • NodeB base station
  • the access network element of the LTE is an Evolved NodeB (abbreviated as e B).
  • 3GPP proposes a carrier aggregation (Carrier Aggregation, CA for short) technical solution, which uses multiple carriers (or multiple serving cells) to simultaneously serve user equipment.
  • the existing carrier aggregation scheme mainly utilizes multiple carriers in a single system to simultaneously provide services for user equipment. For example, two or more carriers in UMTS use two or more carriers to simultaneously communicate with user equipment, or two or two in LTE. The above carrier simultaneously maintains communication with the user equipment.
  • UMTS and LTE long-time
  • different system joint transmission schemes are usually adopted, which may also be called cross-system carrier aggregation.
  • . 2 is a schematic diagram of joint transmission according to the related art. As shown in FIG. 2, the user equipment uses two access technologies simultaneously, and two wireless links are established for transmitting data, which can not only obtain higher throughput.
  • the load balancing between the systems can only be implemented by the method of switching and redirection.
  • the network side can dynamically adjust each user equipment according to the load dynamics of different access systems. The transmission rate on different links can better achieve load balancing.
  • the user equipment adopts the joint transmission scheme the data needs to be split and aggregated between the two systems, and the data is transmitted through the core network, but this will cause a large data delay.
  • the manner of switching through the core network may also cause a large delay in the handover process, and may even cause handover failure.
  • the present invention provides a data transmission method and system to solve at least the problem of data transmission between two access networks through a core network in the related art, thereby causing a large data delay.
  • a data transfer method is provided.
  • the data transmission method according to the present invention includes: an access network element of the first access network acquires address information of an access network element of the second access network; and an access network element of the first access network according to the address information And establishing an interface with the access network element of the second access network; the access network element of the first access network and the access network element of the second access network perform signaling and/or data transmission through the interface.
  • the method further includes: the access network element of the first access network passes through the core network
  • the access network element of the second access network sends an address information acquisition request.
  • the address information obtaining request includes at least one of the following: an identifier of an access network element of the first access network, a location area identifier information of an access network element of the first access network, and an access network of the second access network.
  • the address information acquisition request is a radio access network information management RIM information request data packet, where the RIM information request data packet includes an application layer identifier of the newly added address information.
  • the access network element of the first access network and the access network element of the second access network each include one of the following: a base station of a long term evolution system, a radio network controller of a universal mobile communication system, and a universal mobile communication system.
  • Base station global mobile communication enhanced data rate Global mobile communication evolution technology base station controller of the radio access network system.
  • the address information includes one of the following: an IP address of an access network element of the second access network; an IP address of the access network element of the second access network; and a port of the access network element of the second access network number.
  • the data delivery system includes an access network element of the first access network and an access network element of the second access network, where the access network element of the first access network includes: an acquisition module, In order to obtain the address information of the access network element of the second access network, the establishing module is configured to establish an interface with the access network element of the second access network according to the address information; and the data transmission module is set to be the second The access network element of the access network performs signaling and/or data transmission through the interface.
  • the access network element of the first access network further includes: a sending module, configured to send an address information obtaining request to the access network element of the second access network through the core network.
  • the address information obtaining request includes at least one of the following: an identifier of an access network element of the first access network, a location area identifier information of an access network element of the first access network, and an access network of the second access network.
  • the address information acquisition request is a radio access network information management RIM information request data packet, where the RIM information request data packet includes an application layer identifier of the newly added address information.
  • FIG. 1 is a schematic diagram of a 3GPP access system architecture according to the related art
  • FIG. 2 is a schematic diagram of joint transmission according to the related art
  • FIG. 3 is a flowchart of a data transfer method according to an embodiment of the present invention
  • FIG. 1 is a schematic diagram of a 3GPP access system architecture according to the related art
  • FIG. 2 is a schematic diagram of joint transmission according to the related art
  • FIG. 3 is a flowchart of a data transfer method according to an embodiment of the present invention
  • FIG. 5 is an interaction flowchart according to a preferred embodiment 2 of the present invention
  • 6 is an interaction flowchart according to a preferred embodiment 3 of the present invention
  • FIG. 7 is a structural block diagram of a data delivery system according to an embodiment of the present invention.
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. The invention will be described in detail below with reference to the drawings in conjunction with the embodiments.
  • the embodiment of the present invention provides a data transfer method.
  • FIG. 3 is a flowchart of a data transfer method according to an embodiment of the present invention. As shown in FIG. 3, the following steps S302 to S306 are included.
  • Step S302 The access network element of the first access network acquires address information of the access network element of the second access network.
  • Step S304 the access network element of the first access network establishes an interface with the access network element of the second access network according to the address information.
  • Step S306 the access network element of the first access network and the access network element of the second access network perform signaling and/or data transmission through the interface.
  • two access networks transmit data through the core network, thereby causing a large data delay; switching between systems needs to be performed through the core network, which also causes a large handover delay.
  • by establishing a direct interface across the system data delay can be reduced, handover delay can be reduced, and network maintenance cost of the operator can be reduced.
  • the method further includes: accessing the network element of the first access network through the core The network sends an address information acquisition request to the access network element of the second access network.
  • the address information obtaining request includes at least one of: an identifier of an access network network element of the first access network, a location area identifier information of an access network element of the first access network, and a second access network The identifier of the access network element and the location area identification information of the access network element of the second access network.
  • the address information acquisition request is a RIM information request data packet, wherein the RIM information request data packet includes an application layer identifier of the newly added address information.
  • the access network element of the first access network and the access network element of the second access network each comprise one of the following: a base station of the long term evolution system, a radio network controller of the universal mobile communication system, and a universal mobile Base of communication system Station, Global Mobile Telecommunications Enhanced Data Rate Global Mobile Telecommunications Evolution Technology Base Station Controller for Radio Access Network Systems.
  • the address information includes one of: an IP address of an access network element of the second access network; an IP address of the access network element of the second access network and an access network of the second access network The port number of the meta. It should be noted that the address information in the present invention refers to the transport layer address information (Transport Layer).
  • an Iub interface exists between the RNC in the UMTS system and the base station (base station 1) under its jurisdiction, and the RNC learns the existence according to the measurement report of the user equipment in the cell (cell 1) under the control of the base station 1.
  • the RNC decides to establish a direct interface with the base station 2, and the process of establishing a direct interface is as follows: FIG.
  • step S401 the RNC sends a request for obtaining information to the core network element SGSN, where the request includes the identifier of the base station 2, the Tracking Area Code (TAC) of the cell 2, and the IP address information to be acquired.
  • TAC Tracking Area Code
  • the identifier of the RNC and the location area identifier LAI Location Area Identifier
  • Step S402 After receiving the request for obtaining information, the SGSN sends the request to the MME through the S3 interface according to the tracking area identifier TAC. Step S403, after receiving the request for obtaining information, the MME sends the request to the base station 2 according to the identity of the base station therein. Step S404, after receiving the request for obtaining information, the base station 2 knows that the RNC wants to establish a direct interface with the RNC, and the base station 2 needs to send its own IP address to the RNC. Therefore, the base station 2 carries its own IP address in the response to the information, and then sends the IP address to the MME. Obtain an information response, which also contains the identity of the RNC and its LAI.
  • Step S405 After receiving the response to the acquisition information, the MME sends an acquisition information response to the SGSN.
  • Step S406 After receiving the response information, the SGSN sends a response information response to the RNC.
  • Step S407 after receiving the response information, the RNC obtains the IP address of the base station 2.
  • the RNC can establish a direct interface with the base station 2 through IP transmission.
  • the RNC can send a direct interface setup request to the base station 2, requesting the base station 2 to establish a direct interface with it. If the base station 2 accepts the request, the RNC establishes a direct interface with the base station 2.
  • the RNC and the base station 2 can perform joint transmission on some user equipments; through the direct interface, the delay of the cross-system switching between the RNC and the user equipment in the base station 2 is greatly reduced, and the data transmission rate caused by the cross-system handover is also suddenly dropped. Significant changes will be made, and the shortening of the switching delay will increase the success rate of the handover.
  • the RNC and the base station 2 can directly exchange load information, and the delay is reduced; and other information of the cell under the jurisdiction is exchanged.
  • the RNC and the base station 2 automatically obtain the IP address used by the other party to establish a direct interface through the core network, thereby realizing the automation of the interface establishment.
  • the IP address of the other party is obtained in the manner of the request.
  • the direct interface is established by directly transmitting the IP address to the other party.
  • the specific method is in the request signaling sent by the RNC to the SGSN in step S401.
  • the identifier of the RNC and the IP address of the RNC are included, and the identifier and the TAC of the base station 2 are included.
  • the base station 2 determines whether to establish a direct interface with the RNC.
  • the base station 2 directly sends a direct interface setup request to the RNC through the IP transmission, so that the direct interface can be established faster.
  • the preferred embodiment 1 describes a scenario in which a direct interface is established between the UMTS and the LTE system.
  • the RNC can access the GERAN system through the shared SGSN.
  • the base station or the base station controller BSC
  • the acquisition information request and obtains the IP address of the base station (or the base station controller)
  • the establishment process of the direct interface can be initiated. If the SGSN to which the RNC is connected in the UMTS system is different from the SGSN to which the BSC in the GERAN system is connected, the signaling for obtaining the information request needs to pass through the two SGSNs.
  • a radio access network information management (Radio Access Network Information Management, RIM for short) process may be used to obtain cell radio access network information between different systems.
  • RIM Radio Access Network Information Management
  • a network element that initiates information acquisition of radio access network information of other systems is called a Controlling Base System (Controlling BSS)
  • a network element that provides radio access network information is called a Serving BSS, and controls the base station system and
  • the serving base station system needs to support the Base Station Subsystem GPRS Protocol (BSSGP).
  • BSSGPRS Protocol Base Station Subsystem GPRS Protocol
  • the control base station system sends a RIM Information Request PDU to the serving base station system through the core network, where the request PDU includes a RIM Container and RIM Routing Information.
  • the RIM container contains the RIM Application Identity (Application Application) and the RIM Sequence Number.
  • the RIM application layer identifier contains the need to obtain cell wireless access.
  • the network information content is SON Transfer, System Information ⁇ MBMS data channel, etc. (the information content of the cell needs to be acquired), where SON Transfer refers to the information including the cell load report (Cell Load Reporting); and the application layer container contains the cell to be acquired.
  • the RIM routing information includes a source cell identifier (Source Cell Identifier) and a target cell identifier (Destination Cell Identifier). It should be noted that if it is a BSS in the GERAN system, the source or target cell identifier (Source Cell Identifier or Destination Cell Identifier) is the identifier of the cell under the jurisdiction of the BSS; if it is the RNC in the UMTS system, the source or target The identifier of the cell (Source Cell Identifier or Destination Cell Identifier) refers to the identifier of the RNC; if it is e B in the LTE system, the source or destination cell identifier (Source Cell Identifier or Destination Cell Identifier) is the e B identifier in LTE ( This does not refer to the identity of the cell under the jurisdiction of e B).
  • the existing protocol uniformly uses the identity of the source cell and the identity of the target cell when defining the routing information because the cell is used for routing in the GERAN system.
  • the routing information is different (in the UMTS system).
  • the route is identified by the RNC; in LTE, the eNB is used to identify the route, and the meanings of the source cell identifier (Source Cell Identifier) and the target cell identifier (Destination Cell Identifier) are changed.
  • 5 is an interaction flowchart according to a preferred embodiment of the present invention. As shown in FIG.
  • the preferred embodiment extends the application of the existing RIM process to enable it to acquire the IP address of the different system serving base station system, so that different systems are available. Establish a direct interface between them and implement IP address acquisition through the RIM process.
  • Step S501 the base station system is controlled to send a RIM information request packet to the core network (RIM Information).
  • the newly added RIM application layer identifier is included in the request PDU, and the newly added RIM application layer identifier refers to IP address information (or Transport Layer Address). Similar to the existing RIM process, the RIM information request packet also includes RIM routing information: Source Cell Identifier and Destination Cell Identifier.
  • the control base station system may be a base station controller in the GERAN system, or in a UMTS system.
  • the object of the RIM information request packet transmission is a base station controller (in the GERAN system) or an RNC0JMTS system in the different system; or a base station (in the LTE system).
  • Step S502 After receiving the data packet requested by the RIM information, the core network sends the data packet requested by the RIM information to the serving base station system by using the routing information contained therein.
  • Step S503 After receiving the data packet requested by the RIM information, the serving base station system generates a radio access network information packet (RAN INFORMATION PDU), where the IP address (or transport layer address) of the serving base station system is included.
  • RAN INFORMATION PDU radio access network information packet
  • the serving base station system transmits a radio access network information packet to the core network.
  • the core network forwards the data packet to the control base station system according to the routing information included in the radio access network information data packet.
  • the control base station system obtains the IP address of the serving base station system by parsing the received radio access network information data packet, and can initiate a direct interface establishment request to the serving base station system by using the IP transmission, thereby realizing the purpose of establishing the direct interface.
  • control base station system can obtain the IP address of the serving base station system, for example, the RNC can acquire the IP address of the base station in the LTE system, or the base station in the LTE can acquire the IP address of the RNC, and then the RNC and the base station in the LTE system A direct interface can be established.
  • the network node that schedules the user equipment is the base station (the base station to which the user equipment accesses the cell), in order to achieve cross-system Joint transmission requires a base station in the UMTS system and a base station in the LTE system (or a base station controller in the GERAN system) to establish a direct interface.
  • the RIM process can still be used to establish the direct interface.
  • the base station in the LTE system sends the RIM information request data packet to the RNC through the core network, and the data packet includes the existing RIM routing information and the newly added RIM application layer.
  • the identifier (IP address information) further includes a cell identifier for requesting reporting, where the cell identifier requested to be reported refers to the identifier of the cell managed by the base station managed by the RNC; the RNC receives the data packet requested by the RIM information, and returns the data packet to the base station in the LTE.
  • the IP address of the base station to which the cell to be reported belongs. After the base station in the LTE system obtains the IP address of the base station in the UMTS system, a direct interface can be established. Through the direct interface, the delay of the user equipment for cross-system switching is greatly reduced, and the data transmission rate drop caused by the cross-system switching will also be significantly improved, and the shortening of the switching delay can improve the success rate of the handover.
  • the cell managed by the base station B1 under the RNC and the cell under the base e b in the LTE system have overlapping coverage areas, so it is desirable to establish a direct interface between the two base stations. So that the two systems can implement joint transmission to the user equipment.
  • the network node implementing the scheduling is a base station (e.g., B1), so a direct connection between the base stations of the two systems is required.
  • FIG. 6 is an interaction flowchart according to a preferred embodiment 3 of the present invention. As shown in FIG. 6, the following steps S601 to S605 are included.
  • Step S601 e Bl sends a request for acquiring an address information to the core network, where the identifier of the RNC is included in the request, and the location area identifier LAL where the RNC is located further includes the identifier of B1 or the identifier of the cell under the jurisdiction of B1.
  • the identifier of the eNB 1 and the tracking area identifier TAC where the eNB 1 is located are also included in the request for obtaining the address information.
  • Step S602 After receiving the request for obtaining the address information, the core network sends the request to the RNC according to the routing information.
  • Step S603 after receiving the request for obtaining the address information, the RNC may send the acquisition address information to obtain the address information by requesting the acquisition of the address information from the B1, and then return the response to the core network to obtain the address information response; if the RNC has already learned the address of the B1, Information, you can immediately return to get the address information response.
  • the IP address and port number of B1 are included.
  • the response also includes the identity of eNB1 and the TAC in which it is located.
  • Step S604 After receiving the response to obtain the address information, the core network sends the response signaling to the eNB1.
  • Step S605 after receiving the address information response, the eNB1 obtains the IP address information and the port number of the B1, and can initiate an interface establishment request directly to the NB1 through the IP transmission, so as to establish an interface for joint transmission.
  • the preferred embodiment describes the process of obtaining the address information initiated by the eNB. If the process of obtaining the address information by the B1 is similar to the above description, the only difference is that the B1 needs to send the address information request to the core network through the RNC. In the request, the identifier of the RNC and the location area identifier LAI where the RNC is located need to be included in order to obtain the address information response and can be routed back to the RNC.
  • FIG. 7 is a structural block diagram of a data delivery system according to an embodiment of the present invention. As shown in FIG. 7, an access network element 72 of a first access network and an access network element 74 of a second access network are included, where The access network element 72 of the first access network includes an acquisition module 722, an establishment module 724, and a data delivery module 726.
  • the obtaining module 722 is configured to obtain the address information of the access network element of the second access network.
  • the establishing module 724 is connected to the obtaining module 722, and is configured to obtain the address information acquired by the obtaining module 722, and the second access network.
  • the access network element establishes an interface;
  • the data delivery module 726 is coupled to the establishing module 724, and configured to perform signaling and/or data transmission with an interface established by the access network element of the second access network through the establishing module 724.
  • the access network element 72 of the first access network further includes: a sending module 728, configured to send an address information obtaining request to the access network element of the second access network through the core network.
  • the address information obtaining request includes at least one of: an identifier of an access network network element of the first access network, a location area identifier information of an access network element of the first access network, and a second access network The identifier of the access network element and the location area identification information of the access network element of the second access network.
  • the address information acquisition request is a RIM information request data packet, wherein the RIM information request data packet includes an application layer identifier of the newly added address information.
  • a data transfer method and system are provided.
  • the present invention can reduce data latency and reduce operator network maintenance costs.
  • modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices.
  • they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device, or they may be separately fabricated into individual integrated circuit modules, or they may be Multiple modules or steps are made into a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.

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

Abstract

La présente invention concerne un procédé et un système de transfert de données. Le procédé comprend les étapes suivantes : un élément de réseau d'accès d'un premier réseau d'accès acquiert des informations d'adresse d'un élément de réseau d'accès d'un second réseau d'accès; l'élément de réseau d'accès du premier réseau d'accès établit une interface avec l'élément de réseau d'accès du second réseau d'accès sur la base des informations d'adresse; et l'élément de réseau d'accès du premier réseau d'accès et l'élément de réseau d'accès du second réseau d'accès transfèrent une signalisation et/ou des données via l'interface. La présente invention établit une interface directe entre des systèmes, cela réduit non seulement un retard des données, mais réduit également le retard de transfert entre des systèmes et abaisse les coûts de maintenance du réseau pour l'opérateur.
PCT/CN2012/072387 2011-03-22 2012-03-15 Procédé et système de transfert de données Ceased WO2012126331A1 (fr)

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CN101742690A (zh) * 2008-11-27 2010-06-16 华为技术有限公司 一种ap网络传输优化方法、系统及设备
CN101945374A (zh) * 2009-07-03 2011-01-12 华为终端有限公司 一种网络切换方法及通讯系统以及相关设备

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