WO2017118191A1 - Procédé et dispositif de transmission d'informations de plan de commande - Google Patents

Procédé et dispositif de transmission d'informations de plan de commande Download PDF

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Publication number
WO2017118191A1
WO2017118191A1 PCT/CN2016/104238 CN2016104238W WO2017118191A1 WO 2017118191 A1 WO2017118191 A1 WO 2017118191A1 CN 2016104238 W CN2016104238 W CN 2016104238W WO 2017118191 A1 WO2017118191 A1 WO 2017118191A1
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configuration information
wireless network
communication node
network communication
rrc
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PCT/CN2016/104238
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English (en)
Chinese (zh)
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王昕�
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中兴通讯股份有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/04—Arrangements for maintaining operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
    • H04L69/161—Implementation details of TCP/IP or UDP/IP stack architecture; Specification of modified or new header fields
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/40—Network security protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/12—Setup of transport tunnels
    • 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
    • H04W84/22—Self-organising networks, e.g. ad-hoc networks or sensor networks with access to wired networks

Definitions

  • the present application relates to, but is not limited to, the field of communication for wireless heterogeneous access network deployment, and in particular, to a method and device for transmitting control plane information.
  • the 5G network strives to achieve an order of magnitude increase in data capacity and transmission speed compared to 4G networks, and can be applied to various scenarios and compatible with various terminals at a lower cost.
  • the communication industry basically believes that the service capability provided by the communication network of only the traditional macro base station and the micro base station is difficult to meet the requirements of the 5G system, so the new transmission technology and/or deployment is additionally utilized on the basis of the existing network.
  • the new base station is even more important.
  • the new type of base station involved in this paper is one of the many prototypes of the new type of base station that has been developed.
  • the new type of base station is evolved from 4G.
  • the small evolved Node B (SeNB) is used as the standard to It is different from the traditional macro base station (Moma evolved Node B, MeNB) and the micro base station.
  • FIG. 1 is a schematic diagram of deployment of a communication system.
  • the communication system includes a User Equipment (UE), an access network, and a Core Network (CN).
  • the SeNB and the MeNB are deployed in the access network.
  • MME Mobility Management Entity
  • the types and attributes of the wired interfaces between the SeNB and the MeNB may be various, such as the X2 interface in the related art.
  • the control plane interface S1-MME between the access network and the core network is established in the MeNB and the MME.
  • UE-related control plane signaling needs to be transmitted between the MeNB and the UE via the SeNB.
  • the user interface data and control plane signaling are transmitted on the wireless interface established between the UE and the SeNB.
  • the wireless establishment between the UE and the MeNB An interface that transmits user plane data and control plane signaling.
  • the control plane protocol stack between the access network and the MME and the UE in which the SeNB is deployed is as shown in FIG. 2 .
  • the SeNB does not have a Radio Resource Control (RRC) entity on the control plane, and has at least no Packet Data Convergence Protocol (PDCP) sublayer on the Layer 2 protocol stack, that is, the SeNB.
  • RRC Radio Resource Control
  • PDCP Packet Data Convergence Protocol
  • the radio link control (RLC) sublayer, the medium access control (MAC) sublayer, and the physical layer (PHY) may be configured.
  • the peer entity corresponding to the RRC entity and the PDCP entity on the UE side is established on the MeNB, that is, the responsibilities for the UE's mobility control, radio resource configuration, and encryption of the radio interface remain in the MeNB, and the data of the UE is Transmission, mobility and other aspects are very beneficial.
  • the underlying transmission technology, deployment scenarios, and types of UEs that can be supported by the SeNB are very extensive.
  • the SeNB can provide services for the UE; in addition, in terms of the radio interface, the SeNB can provide services for the UE separately (ie, support single-connected UEs), and can also cooperate.
  • the MeNB provides a joint service for the UE (ie, supports dual connectivity UE).
  • the control plane information related to the UE is mainly transmitted through RRC signaling.
  • the generation/transmission and reception/processing of RRC signaling can only be performed by the MeNB having the RRC entity, and the RRC that should have been transmitted only in the wireless Uu port is loaded with RRC.
  • the PDCP packet of the configuration information needs to be transmitted not only on the Uu interface between the SeNB and the UE but also on the wired X2 interface between the SeNB and the MeNB. Therefore, how to efficiently and reliably transmit RRC configuration information on the X2 interface is a problem that needs to be solved at present.
  • the embodiment of the invention provides a method and a device for transmitting control plane information, which can effectively and reliably transmit control plane information on a wired interface.
  • An embodiment of the present invention provides a method for transmitting control plane information, which is applied to a wireless network communication node deployed in an access network, including: a wireless network communication node acquires RRC configuration information; and the wireless network communication node passes at least one of the following manners Transmitting the RRC configuration information on a wired interface:
  • X2-AP X2 Application Layer Protocol
  • the data packet carrying the RRC configuration information is transmitted through a tunnel.
  • the transmitting, by the wireless network communication node, the RRC configuration information on the wired interface includes at least one of the following:
  • the wireless network communication node receives the RRC configuration information on a wired interface.
  • the acquiring, by the wireless network communications node, the RRC configuration information includes:
  • the wireless network communication node receives an RRC message carrying RRC configuration information
  • the RRC entity of the wireless network communication node generates RRC configuration information.
  • the method further includes: determining, by the wireless network communication node, whether the RRC message that carries the RRC configuration information received from the user equipment (UE) needs to be sent to another A wireless network communication node, wherein the basis for the judgment comprises at least one of the following terms:
  • the wireless network communication node processes the RRC message when the wireless network communication node decides not to forward the received RRC message.
  • the another wireless network communication node is a pre-configured wireless network communication node or a wireless network communication node dynamically selected by content in the RRC message.
  • the method further includes:
  • RLC Radio Link Control
  • SDU RLC Service Data Unit
  • the packet convergence protocol (PDCP) entity of the wireless network communication node encapsulates the RRC configuration information generated by the RRC entity to obtain a PDCP protocol data unit (PDU) carrying the RRC configuration information, and the wireless network communication node passes the X2 interface.
  • the control plane protocol stack entity encapsulates the PDCP PDU carrying the RRC configuration information in a container of X2-AP signaling.
  • the wireless network communication node transmits the RRC configuration information on a wired interface, including:
  • the wireless network communication node sends the X2-AP signaling by using the X2 interface, where the container of the X2-AP signaling is encapsulated with an RLC SDU carrying RRC configuration information, or the X2-AP signaling
  • the container is encapsulated with a PDCP PDU carrying RRC configuration information.
  • the foregoing method further includes at least one of the following:
  • the wireless network communication node establishes at least one common universal data packet wireless system tunneling protocol user plane (GTP-U) on the wired interface and another wireless network communication node connected to the wireless network communication node through the wired interface. a tunnel for transmitting information carried by the SRB0 on the radio interface;
  • GTP-U universal data packet wireless system tunneling protocol user plane
  • the wireless network communication node establishes at least one GTP-U tunnel on the wired interface and another wireless network communication node connected to the wireless network communication node through the wired interface, for transmitting on the wireless interface with SRB1 or Information carried by SRB2.
  • the wireless network communication node transmits the RRC configuration information on a wired interface, including at least one of the following:
  • the wireless network communication node sends the RRC configuration information in an encapsulated form of a user plane protocol stack of the X2 interface by using the GTP-U tunnel.
  • the wireless network communication node includes: a small base station (SeNB), or a macro base station (MeNB) connected to the SeNB through a wired interface, or meets a third generation partnership plan (3GPP) access network specification requirement.
  • a small base station SeNB
  • MeNB macro base station
  • 3GPP third generation partnership plan
  • the embodiment of the invention further provides a transmission device for controlling plane information, which is applied to a wireless network communication node deployed in an access network, and includes:
  • the transmission module is configured to transmit the RRC configuration information on the wired interface by using at least one of the following methods:
  • the data packet carrying the RRC configuration information is transmitted through a tunnel.
  • the transmission module is configured to perform at least one of the following:
  • the RRC configuration information is received on a wired interface.
  • the obtaining module includes:
  • a receiving unit configured to receive an RRC message carrying RRC configuration information
  • the RRC entity is configured to generate RRC configuration information.
  • the foregoing apparatus further includes: a determining module, configured to determine, when the acquiring module receives an RRC message carrying RRC configuration information from the UE, whether the RRC message needs to be sent to another wireless network communication node, where The basis for the judgment includes at least one clause:
  • the foregoing apparatus further includes: a first processing module, configured to process the RRC message when the determining module determines not to forward the received RRC message.
  • a first processing module configured to process the RRC message when the determining module determines not to forward the received RRC message.
  • the another wireless network communication node is a pre-configured wireless network communication node or a wireless network communication node dynamically selected by content in the RRC message.
  • the foregoing apparatus further includes: a second processing module, configured to decapsulate the received RRC message to the RLC layer, and obtain an RLC SDU that carries the RRC configuration information, by using X2
  • the control plane protocol stack entity of the interface carries the RLC SDU of the RRC configuration information and is encapsulated in the container of the X2-AP signaling.
  • the foregoing apparatus further includes: a PDCP entity and an encapsulating module; the PDCP entity is configured to encapsulate the RRC configuration information generated by the RRC entity to obtain a PDCP PDU that carries the RRC configuration information; and the encapsulating module is configured to pass The control plane protocol stack entity of the X2 interface encapsulates the PDCP PDU carrying the RRC configuration information in a container of X2-AP signaling.
  • the apparatus further includes: a tunnel establishment module, configured to perform at least one of: establishing at least one public on the wired interface and another wireless network communication node connected to the wireless network communication node through the wired interface a GTP-U tunnel for transmitting information carried by the SRB0 on the wireless interface; establishing at least one GTP-U on the wired interface and another wireless network communication node connected to the wireless network communication node through the wired interface A tunnel for transmitting information carried on the radio interface with SRB1 or SRB2.
  • a tunnel establishment module configured to perform at least one of: establishing at least one public on the wired interface and another wireless network communication node connected to the wireless network communication node through the wired interface a GTP-U tunnel for transmitting information carried by the SRB0 on the wireless interface; establishing at least one GTP-U on the wired interface and another wireless network communication node connected to the wireless network communication node through the wired interface A tunnel for transmitting information carried on the radio interface with SRB1 or SRB2.
  • the transmission module is configured to perform at least one of the following:
  • the wireless network communication node includes: an SeNB, or an MeNB connected to the SeNB through a wired interface, or another network node that meets the requirements of the 3GPP access network specification.
  • an embodiment of the present invention further provides a computer readable storage medium storing computer executable instructions, and the method for transmitting the control plane information is implemented when the computer executable instructions are executed.
  • the wireless network communication node acquires RRC configuration information, and transmits RRC configuration information on the wired interface by transmitting at least one of the following: transmitting X2-AP signaling, where the X2-AP signaling container The RRC configuration information is included; the data packet carrying the RRC configuration information is transmitted through the tunnel.
  • the embodiment of the present invention can effectively and reliably transmit the control plane information on the wired interface.
  • the embodiment of the present invention is applicable to various wired interfaces, various capabilities, and UEs of various states, and ensures that the RRC configuration information is Reliability of transmission over wired interfaces.
  • embodiments of the present invention enable the RRC configuration information to be efficiently transmitted between the SeNB configuring only the partial control plane protocol stack and the MeNB configuring the full control plane protocol stack.
  • FIG. 1 is a schematic diagram of deployment of a communication system
  • FIG. 2 is a schematic diagram of a control plane protocol stack of the system architecture shown in FIG. 1;
  • FIG. 3 is a flowchart of a method for transmitting control plane information according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of a protocol stack of a system control plane according to Embodiment 1 of the present invention.
  • FIG. 5 is a schematic diagram of a protocol stack of a system control plane according to Embodiment 2 of the present invention.
  • FIG. 6 is a schematic diagram of a system control plane protocol stack and a tunnel establishment process according to Embodiment 3 of the present invention.
  • FIG. 7 is a schematic diagram of a system control plane protocol stack and a tunnel establishment process according to Embodiment 4 of the present invention.
  • FIG. 8 is a schematic diagram of a device for transmitting control plane information according to an embodiment of the present invention.
  • FIG. 9 is another schematic diagram of a device for transmitting control plane information according to an embodiment of the present invention.
  • FIG. 3 is a flowchart of a method for transmitting control plane information according to an embodiment of the present invention. As shown in FIG. 3, the method for transmitting control plane information provided in this embodiment is applied to a wireless network communication node deployed in an access network, and includes the following steps:
  • Step 11 The wireless network communication node acquires RRC configuration information.
  • Step 12 The wireless network communication node transmits the RRC configuration information on the wired interface by using at least one of the following manners:
  • X2-AP Transmitting X2 Application Protocol (AP) (X2-AP) signaling, where the container of the X2-AP signaling includes RRC configuration information;
  • the data packet carrying the RRC configuration information is transmitted through the tunnel.
  • the wireless network communication node is, for example, a small base station (SeNB) in the communication system shown in FIG. 1 or a macro base station (MeNB) connected to the SeNB through a wired interface (such as an X2 interface).
  • the wireless network communication node may also be, for example, other network nodes (such as next generation communication network access network devices) that meet the requirements of the 3rd Generation Partnership Project (3GPP) access network specification.
  • 3GPP 3rd Generation Partnership Project
  • step 12 includes at least one of the following:
  • the wireless network communication node sends RRC configuration information on the wired interface
  • the wireless network communication node receives the RRC configuration information on the wired interface.
  • step 11 includes:
  • the wireless network communication node receives the RRC message carrying the RRC configuration information
  • the RRC entity of the wireless network communication node generates RRC configuration information.
  • acquisition includes, but is not limited to, “receive” and “generate”.
  • the method further includes: determining, by the wireless network communication node, whether the RRC message that carries the RRC configuration information received from the UE needs to be sent to another wireless network communication node, where the basis for the determination includes the following at least One clause:
  • the physical resource is a physical resource related to the current RRC message transmission, for example, a random access resource received before sending the RRC message, and the like;
  • the wireless network communication node such as the wireless network communication node 1
  • SRB Signaling Radio Bearer
  • the wireless network communication node When the RRC message from the UE is received by the wireless network communication node, it is determined that the RRC message uses a common transport channel, and then the RRC message is forwarded to another wireless network communication node;
  • the wireless network communication node Determining the RRC when the wireless network communication node receives an RRC message from the UE If the pre-configured random access resource is used in the message sending process, the RRC message is forwarded to another wireless network communication node;
  • the wireless network communication node When the wireless network communication node receives the RRC message from the UE, the RRC message is forwarded to another wireless network communication node according to one or more of the following in the message content:
  • the RRC message type is a specific RRC message, for example, the RRC message is an RRC setup request;
  • the UE ID of the RRC message is determined. For example, when it is determined that the RRC message is from a UE that has established a context on the communication node of the wireless network, or has a context and the context indicates that forwarding is not performed, no forwarding is performed.
  • the another wireless network communication node (such as the wireless network communication node 2) is a pre-configured wireless network communication node or a wireless network communication node dynamically selected by content in the RRC message.
  • the wireless network communication node 2 selects the cause value by, for example, RRC, or selects it through a public land mobile network (PLMN) or other ID.
  • PLMN public land mobile network
  • the wireless network communication node processes the RRC message when the wireless network communication node decides not to forward the received RRC message.
  • the method further includes:
  • the wireless network communication node decapsulates the received RRC message to the RLC layer to obtain an RLC Service Data Unit (SDU) carrying the RRC configuration information; the wireless network communication node carries the control plane protocol stack through the X2 interface.
  • the RLC SDU of the RRC configuration information is encapsulated in a container of X2-AP signaling; or,
  • the PDCP entity of the wireless network communication node encapsulates the RRC configuration information generated by the RRC entity to obtain a PDCP protocol data unit (PDU) carrying the RRC configuration information; the wireless network communication node passes the control plane protocol stack entity of the X2 interface.
  • the PDCP PDU carrying the RRC configuration information is encapsulated in a container of X2-AP signaling.
  • the step 12 includes: the wireless network communication node sends the X2-AP signaling by using the X2 interface, where the container of the X2-AP signaling is encapsulated with an RLC SDU carrying RRC configuration information, or the X2- The container of the AP signaling encapsulates a PDCP PDU carrying RRC configuration information.
  • the foregoing method further includes at least one of the following:
  • the wireless network communication node establishes at least one common universal packet wireless system tunneling protocol user plane (General Packet Radio System (GPRS)) on the wired interface and another wireless network communication node connected to the wireless network communication node through the wired interface.
  • GPRS General Packet Radio System
  • GTP-U Tunneling Protocol User Plane tunnel for transmitting information carried by SRB0 on the radio interface;
  • the wireless network communication node establishes at least one GTP-U tunnel on the wired interface and another wireless network communication node connected to the wireless network communication node through the wired interface, for transmitting information carried by the SRB1 or SRB2 on the wireless interface. .
  • step 12 includes at least one of the following:
  • the wireless network communication node sends the RRC configuration information in the form of a User Datagram Protocol (UDP) through a public GTP-U tunnel;
  • UDP User Datagram Protocol
  • the WLAN configuration node sends the RRC configuration information in a package form of the user plane protocol stack of the X2 interface through the GTP-U tunnel.
  • the control plane information related to the UE is mainly transmitted by using RRC signaling, where the control plane information is mapped on the control channel for transmission in the MAC entity, and the control channel is further divided according to the current RRC state of the UE. for:
  • the common control channel is used when the RRC connection is not established between the UE and the access network, and the corresponding bearer is a Signaling Radio Bearer (SRB) 0;
  • SRB Signaling Radio Bearer
  • the base station does not have a complete context of the UE, and the PDCP entity is not yet established between the base station and the UE, that is, SRB0 is a PDCP transparent mode (TM);
  • the corresponding bearer may be SRB1 or SRB2;
  • SRB1, and 2 have their own PDCP entities, that is, encryption and integrity protection are required.
  • the information carried by the SRB0 is suitable for carrying in the container of the X2-AP signaling for transmission. Since SRB0 does not require the processing of the PDCP entity, that is, the RRC entity of the MeNB and the control plane protocol stack entity of the X2 interface can directly interact with each other, the implementation complexity is not improved compared to the related art.
  • the base station For information carried by SRB1 or SRB2, it is suitable for transmission through a tunnel.
  • the base station has the context of the UE, that is, the operation of establishing the GTP-U for the SRB1 or the SRB2 is similar to the operation when the GTP-U is established for the Data Radio Bearer (DRB) in the related art.
  • DRB Data Radio Bearer
  • a common GTP-U tunnel needs to be established between the SeNB and the MeNB, so that the information of the SRB0 bearer of the UE that initiates the access to the SeNB can be transmitted through the public GTP-U tunnel.
  • the RRC configuration information that needs to be carried by the SRB0 is transmitted on the X2 interface by using a control plane signaling flow.
  • the RRC configuration information is carried in an RRC container (Container) in the X2-AP signaling, and is transmitted by using an X2 interface in an existing X2 Control Plane (CP) message.
  • the control plane protocol stack of the communication system is as shown in FIG.
  • the process of performing a one-way control plane signaling transmission is as follows:
  • Step 101 When the UE in the RRC idle state needs to access the network, the UE selects an appropriate base station according to the measurement result of the wireless signal and the like, and requests the RRC connection establishment from the base station.
  • the UE after the UE selects the SeNB, the UE generates RRC configuration information in the RRC entity, and carries the RRC configuration information in an RRC Connection Request message, and sends the message through the wireless Uu interface.
  • the SeNB is sent, wherein the RRC message is carried by SRB0.
  • SRB0 belongs to PDCPTM and is mapped on the CCCH in the MAC entity.
  • Step 102 After receiving the RRC message on the SRB0, the SeNB decapsulates the RRC message to the RLC layer and obtain the RLC service data unit (Service Data Unit) according to the configuration of the protocol stack and the identity of the receiving end. SDU), the RLC SDU is encapsulated in a Container carried in the X2-AP signaling according to the control plane protocol stack of the X2 interface, and the X2-AP signaling is sent to the MeNB through the X2 interface.
  • RLC service data unit Service Data Unit
  • the X2-AP signaling is transmitted to the MeNB, which is signaling indicating that the UE attempts to access the network, and the Container carries an RLC SDU including inter-node RRC configuration information, where the RRC The configuration information indicates the RRC Connection Request related information required on the network side.
  • Step 103 The MeNB extracts the RLC SDU included in the Container from the received X2-AP signaling, and submits the RLC SDU to the upper RRC entity for processing. If the MeNB agrees to the access request of the UE, the MeNB continues to request access of the UE to the core network through the S1 interface.
  • the technology of the subsequent access process is the same as the related standard, so it will not be described here.
  • the RRC configuration information that needs to be carried by SRB1 or SRB2 is transmitted on the X2 interface by using a control plane signaling flow.
  • the RRC configuration information is carried in the RRC Container in the X2-AP signaling, and the reliable message transmission is performed through the X2 interface and using the Stream Control Transmission Protocol (SCTP).
  • SCTP Stream Control Transmission Protocol
  • the control plane protocol stack of the communication system is as shown in FIG. 5.
  • the process of performing a one-way control plane signaling transmission is as follows:
  • Step 201 The MME in the core network triggers an S1 procedure (such as parameter modification of an Evolved Packet System (EPS) bearer) of the UE-side radio resource configuration modification, and the S1 procedure is performed by the MME through the S1-
  • the MME interface sends S1-AP signaling (such as E-RAB MODIFY REQUEST signaling) to the MeNB as a start.
  • S1-AP signaling such as E-RAB MODIFY REQUEST signaling
  • step 201 is optional, that is, the MeNB can autonomously trigger the RRC signaling procedure facing the UE, and does not have to be triggered by the signaling indication from the MME.
  • Step 202 The MeNB generates corresponding RRC configuration information in the RRC entity according to the received S1-AP signaling indication, and the RRC configuration information is delivered by the RRC entity to the PDCP entity in the lower layer, and then the PDCP entity performs the The RRC configuration information is encapsulated and processed such as encryption and integrity protection.
  • the PDCP entity submits the processed PDCP Protocol Data Unit (PDU) to the control plane protocol stack of the X2 interface (ie, SCTP and the following layers) for transmission on the wired interface.
  • PDU PDCP Protocol Data Unit
  • X2-AP signaling carries a new Container, and the Container is loaded with The PDCP PDU of the RRC configuration information.
  • the MeNB transmits the X2-AP signaling to the SeNB.
  • Step 203 As a receiving end of the X2 interface, the SeNB extracts the received signaling flow from the X2 control plane protocol stack to obtain the PDCP PDU, and submits the protocol stack to the wireless interface (ie, the RLC and the following layers). And then sent to the UE through SRB1 or SRB2.
  • the wireless interface ie, the RLC and the following layers
  • Step 204 The receiving end UE decapsulates the control plane signaling received on the SRB1 or the SRB2 according to the relevant protocol stack, and obtains the RRC configuration information indicated by the MeNB in the RRC entity.
  • the user plane (UP) data transmission is adopted, that is, the RRC configuration information is sent through the GTP-U tunnel.
  • the SeNB and the MeNB establish a common GTP-U tunnel for the SRB0 of all UEs on the X2 interface, and transmit the signaling transmitted on the SRB0.
  • the protocol stack for transmitting SRB0 (wireless Uu port) in the communication system is shown in Figure 6(a), and the X2 interface tunnel is established as shown in Figure 6(b).
  • the process of performing a one-way control plane signaling transmission is as follows:
  • Step 301 When the UE in the RRC idle state needs to access the network, the UE selects an appropriate base station according to the measurement result of the wireless signal, and requests the RRC connection establishment to the base station.
  • the UE_2 after the UE_2 selects the SeNB, the UE_2 generates the RRC configuration information in the RRC entity, and the RRC configuration information is carried in the RRC Connection Request message, and is sent to the SeNB through the wireless Uu interface, where the RRC The message is carried over SRB0.
  • SRB0 belongs to PDCPTM and is mapped on the CCCH in the MAC entity.
  • Step 302 The SeNB and the MeNB establish a common GTP-U tunnel (GTP-U_Common) on the X2 interface, and the SRB0 signaling (such as UE_1 and UE_2) of at least one UE may be transmitted on the tunnel.
  • GTP-U_Common GTP-U tunnel
  • SRB0 signaling such as UE_1 and UE_2
  • the SeNB After receiving the RRC message on the SRB0, the SeNB decapsulates the RRC message to the RLC layer and obtains the RLC SDU according to the configuration of the protocol stack, and then obtains the RLC SDU by using the GTP-U_Common.
  • the RLC SDU is sent to the MeNB in the form of a User Datagram Protocol (UDP).
  • UDP User Datagram Protocol
  • Step 303 The MeNB extracts the UDP data received from the GTP-U_Common and submits it to the upper layer (RRC entity) for processing. If the MeNB agrees to the UE's access request, the MeNB continues to request the UE's access to the core network through the S1 interface.
  • the technology of the subsequent access procedure (such as establishing a signaling connection on the S1-MME) is the same as the relevant standard. Therefore, it will not be repeated here.
  • the user plane data transmission is adopted, that is, the RRC configuration information is sent through the GTP-U tunnel.
  • the SeNB and the MeNB respectively establish a GTP-U tunnel for each UE's SRB1 or SRB2 on the X2 interface, and use the signaling that each UE needs to transmit on SRB1 or 2.
  • the protocol stack for transmitting SRB1 or SRB2 (wireless Uu port) in the communication system is shown in Figure 7(a), and the X2 interface tunnel establishment process is shown in Figure 7(b).
  • the process of performing a one-way control plane signaling transmission is as follows:
  • Step 401 When the MeNB triggers the RRC signaling of the UE_1, the RRC configuration information is first generated in the RRC entity, and the RRC configuration information is delivered by the RRC entity to the PDCP entity in the lower layer.
  • the RRC configuration information is encapsulated and processed such as encryption and integrity protection.
  • the PDCP PDU is signaling data that is mapped on SRB2.
  • GTP-U_1 a GTP-U tunnel
  • the MeNB and the SeNB exchange the transport layer address (Transport Layer Address) allocated to the GTP-U_1 on the X2 interface control plane. And the tunnel port (GTP TEID) number.
  • the MeNB encapsulates the PDCP PDU in the form of an X2 interface user plane protocol stack, and sends the PDCP PDU to the SeNB through the GTP-U_1.
  • Step 402 The SeNB extracts the data packet received on the GTP-U_1 from the X2 user plane protocol stack to obtain the PDCP PDU, and further encapsulates the RLC packet transmitted by the wireless interface, and then sends the RLC packet to the UE1 through the SRB2. .
  • Step 403 UE_1 decapsulates the information received on the SRB2 according to the protocol stack, and obtains the RRC configuration information indicated by the MeNB in the RRC entity.
  • GTP-U_2 Another GTP-U tunnel (GTP-U_2) is established between the MeNB and the SeNB for the SRB2 of the UE_2, and the operation details are similar to those of the GTP-U_1. Therefore, it will not be repeated here.
  • the difference between this embodiment and the first embodiment is that, in this embodiment, after receiving the RRC message from the UE, the SeNB determines whether to send the RRC message to the MeNB.
  • the physical resource is a physical resource related to the current RRC message transmission, for example, a random access resource received before sending the RRC message, and the like;
  • the SeNB When the SeNB receives the RRC message from the UE and determines that the RRC message belongs to the logical channel SRB0, the SeNB determines to forward the RRC message to the MeNB.
  • the SeNB when the SeNB decides not to forward the received RRC message, the SeNB processes the RRC message.
  • the transmission process of the RRC configuration information between the SeNB and the MeNB in this embodiment is the same as that in the first embodiment, and therefore will not be further described herein.
  • an embodiment of the present invention further provides a transmission device for controlling plane information, which is applied to a wireless network communication node deployed in an access network, including:
  • the transmission module is configured to transmit the RRC configuration information on the wired interface by using at least one of the following methods:
  • the data packet carrying the RRC configuration information is transmitted through a tunnel.
  • the transmission device of the control plane information is applied, for example, to the SeNB in the communication system shown in FIG. 1 or the MeNB connected to the SeNB through a wired interface (such as an X2 interface).
  • a wired interface such as an X2 interface
  • the transmission device of the control plane information can also be applied, for example, to other network nodes (such as next generation communication network access network devices) that meet the requirements of the 3GPP access network specification.
  • the transmission module is configured to perform at least one of the following:
  • the RRC configuration information is received on a wired interface.
  • FIG. 8 is a schematic diagram of a device for transmitting control plane information according to an embodiment of the present invention.
  • the apparatus for transmitting control plane information provided in this embodiment is applied to an SeNB, and includes: an acquisition module, a determination module, a first processing module, a second processing module, and a transmission module.
  • the obtaining module includes: a receiving unit, configured to receive, by using a wireless interface, an RRC message that carries RRC configuration information from a UE, where the determining module is configured to determine whether the RRC message needs to be sent to another wireless network.
  • a first processing module configured to process the RRC message when the determining module determines not to forward the received RRC message; and the second processing module is configured to: when the determining module decides to forward And receiving the RRC message, decapsulating the received RRC message to the RLC layer, obtaining the RLC SDU carrying the RRC configuration information, and encapsulating the RLC SDU carrying the RRC configuration information by using a control plane protocol stack entity of the X2 interface In a container of X2-AP signaling; the transmission module is configured to send the X2-AP signaling through the X2 interface.
  • the judging module judges the basis for including at least one clause: determining according to the logical channel type used by the received RRC message; determining according to the type of the transport channel used by the received RRC message; according to the received RRC message The physical resource used is judged; it is judged according to the content in the received RRC message.
  • FIG. 9 is another schematic diagram of a device for transmitting control plane information according to an embodiment of the present invention.
  • the apparatus for transmitting control plane information provided in this embodiment for example, is applied to an MeNB, including: an acquisition module, a PDCP entity, a package module, and a transmission module.
  • the acquiring module includes: an RRC entity, configured to generate RRC configuration information, and deliver the RRC configuration information to the PDCP entity; the PDCP entity is configured to perform encapsulation processing on the RRC configuration information, and obtain a PDCP PDU of the RRC configuration information; the encapsulating module is configured to encapsulate the PDCP PDU carrying the RRC configuration information in a container of the X2-AP signaling by using a control plane protocol stack entity of the X2 interface; the transmission module And configured to send the X2-AP signaling by using the X2 interface.
  • an RRC entity configured to generate RRC configuration information, and deliver the RRC configuration information to the PDCP entity
  • the PDCP entity is configured to perform encapsulation processing on the RRC configuration information, and obtain a PDCP PDU of the RRC configuration information
  • the encapsulating module is configured to encapsulate the PDCP PDU carrying the RRC configuration information in a container of the X2-AP signaling by using a control
  • the transmission device of the control plane information further includes: a tunnel establishment module, configured to perform at least one of: communicating with the wireless network node on the wired interface and through the wired interface
  • the connected another wireless network communication node establishes at least one common GTP-U tunnel for transmitting information carried by the SRB0 on the wireless interface; and connecting to the wireless network communication node on the wired interface and through the wired interface
  • Another wireless network communication node establishes at least one GTP-U tunnel for communicating information carried on the radio interface with SRB1 or SRB2.
  • the transmission module is configured to perform at least one of the following:
  • the embodiments of the present invention can effectively and reliably transmit control plane information related to a UE on a wired interface between a SeNB configured only with a part of the control plane protocol stack and a MeNB configured with a complete control plane protocol stack. Moreover, the embodiments of the present invention are applicable to UEs of various wired interfaces, various capabilities, and various states.
  • an embodiment of the invention further provides a computer readable storage medium storing computer executable instructions, the method of transmitting the control plane information being implemented when the computer executable instructions are executed.
  • the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation.
  • the technical solution of the present application which is essential or contributes to the related art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk, CD-ROM).
  • the instructions include a number of instructions for causing a terminal device (which may be a cell phone, computer, server, or network device, etc.) to perform the methods described in each embodiment of the present application.
  • modules or steps of the present application can be implemented by a general-purpose computing device, which can be centralized on a single computing device or distributed over a network 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 for execution by the computing device and, in some cases, may be performed in a different order than that illustrated herein. Or describing the steps, or making them into a single integrated circuit module, or making multiple modules or steps into a single integration The circuit module is implemented. Thus, the application is not limited to any particular combination of hardware and software.
  • the embodiment of the present invention provides a method and a device for transmitting control plane information, which can effectively and reliably transmit control plane information on a wired interface, and is applicable to UEs with various wired interfaces, various capabilities, and various states, and The reliability of the transmission of the RRC configuration information on the wired interface is guaranteed.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé permettant de transmettre des informations de plan de commande, qui est appliqué à un nœud de communication réseau sans fil déployé dans un réseau d'accès. Le procédé comprend les étapes suivantes dans lesquelles : un nœud de communication réseau sans fil acquiert des informations de configuration RRC ; et le nœud de communication réseau sans fil transmet les informations de configuration RRC sur une interface câblée au moyen d'au moins un des modes suivants : une transmission de signalisation X2-AP, un contenant de la signalisation X2-AP comprenant les informations de configuration RRC, et une transmission d'un paquet de données contenant les informations de configuration RRC par l'intermédiaire d'un tunnel. Grâce à ce procédé, des informations de plan de commande peuvent être transmises de manière efficace et fiable sur une interface câblée.
PCT/CN2016/104238 2016-01-04 2016-11-01 Procédé et dispositif de transmission d'informations de plan de commande WO2017118191A1 (fr)

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