WO2009132565A1 - 网元间公共控制消息的同步方法 - Google Patents

网元间公共控制消息的同步方法 Download PDF

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Publication number
WO2009132565A1
WO2009132565A1 PCT/CN2009/071424 CN2009071424W WO2009132565A1 WO 2009132565 A1 WO2009132565 A1 WO 2009132565A1 CN 2009071424 W CN2009071424 W CN 2009071424W WO 2009132565 A1 WO2009132565 A1 WO 2009132565A1
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Prior art keywords
network element
message
information
update
distributed network
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PCT/CN2009/071424
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English (en)
French (fr)
Inventor
艾建勋
姚翠峰
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中兴通讯股份有限公司
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to JP2011506559A priority Critical patent/JP5184698B2/ja
Priority to EP09737675.0A priority patent/EP2278831B1/en
Priority to KR1020107026761A priority patent/KR101195538B1/ko
Priority to US12/988,633 priority patent/US8483205B2/en
Publication of WO2009132565A1 publication Critical patent/WO2009132565A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W56/00Synchronisation arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/30Resource management for broadcast services

Definitions

  • the present invention relates to the field of communications, and in particular, to a method for synchronizing common control messages between network elements.
  • BACKGROUND OF THE INVENTION nowadays, the demand for mobile communication is no longer limited to telephone and message services.
  • multimedia services With the rapid development of the Internet, a large number of multimedia services have emerged.
  • Some of these applications multiple users can receive the same data at the same time, such as video on demand, TV broadcast, video conferencing, online education, interactive games and so on.
  • the Multimedia Broadcast Multicast Service (MBMS) technology is proposed to achieve the most efficient use of mobile network resources. It refers to a point-to-multipoint service in which a data source sends data to multiple users, and realizes network resource sharing.
  • the MBMS defined by the 3rd Generation Partnership Project (3GPP) can not only realize plain text low-rate message-like multicast and broadcast, but also realize high-speed multimedia service multicast and broadcast. Comply with the trend of future mobile data development.
  • 3GPP 3rd Generation Partnership Project
  • the MBMS Single Frequency Network (MBSFN) technology requires all neighboring base stations to simultaneously transmit the same wireless signal, and the user equipment (user equipment, referred to as UE) Signals from different base stations can be considered as multipath signals.
  • the public physical channel transmits a broadcast service to obtain a relatively large signal gain, thereby improving the quality of service (QoS) performance of the MBMS service.
  • QoS quality of service
  • MBSFN cells A group of cells that simultaneously transmit MBMS service radio signals form an MBSFN synchronization area i or these cells are called MBSFN cells. Simultaneously transmitting the same radio signal, including MBMS service signal, and all or part of system message content, point-to-multipoint control channel message (MCCH message), MBMS notification indicator channel (MICH), in the MBSFN synchronization area i or within the cell Message.
  • MCCH message point-to-multipoint control channel message
  • MICH MBMS notification indicator channel
  • system messages are composed of information blocks (IB), which are functionally divided into a main information block (MIB), a scheduling information block, and a system information block.
  • the information block When the information block is transmitted on the wireless interface, it is further divided into several segment segments, which are further classified into the first segment, the intermediate segment, the last segment, the complete segment, and the like according to their types, and According to the schedule Send.
  • SFN modulo repetition period segmentation position.
  • the scheduling of the confidence block is changed as follows: A Scheduling Unit (SU) is defined, and one or more information blocks are mapped to one scheduling unit. in.
  • SU Scheduling Unit
  • the MCCH is a logical channel
  • the MCCH channel message includes a series of MBMS service control messages
  • the scheduling information includes: a modification period, and a repetition period.
  • a modification period the MCCH message is repeatedly used according to the repetition period.
  • the wireless interface sends, but its contents cannot be modified during the modification period.
  • the MICH is a physical channel, which is used to notify the UE about the change of the MBMS service in the MCCH channel message.
  • TD-SCDMA Time Division Synchronous Code Division Multiple Access
  • MBSFN dedicated carrier frequency is used, which is at a frequency point. All physical channels in each time slot are synchronized with the desired frequency, time slot and physical channel of the neighboring cell, wherein the system message of the neighboring cell, the MCCH channel message, and the MICH channel are also Need to send synchronously.
  • WCDMA Wideband Code Division Multiple Access
  • the system message, MCCH channel message, and MICH channel of the neighboring cell also need to be sent synchronously.
  • FDD Frequency Division Duplex
  • HSPA+ High Speed Packet Access Plus
  • the cells that use the MBSFN network are required to signal all the channels in the cell.
  • the same frequency point of the neighboring cell the physical channel keeps the content and time synchronization, and the system message, the MCCH channel message, and the MICH channel of the neighboring cell also need to be sent synchronously.
  • the system messages are divided into global system messages and local system messages.
  • the MCCH channel in the MBSFN area needs to be transmitted synchronously.
  • all the neighboring cells need to synchronously transmit all or part of the radio interface control message.
  • the MBMS service is a service for the entire network, and the same MBMS service may be established on different distributed network element nodes. In this way, the cells between different distributed network element nodes also need to keep all or part of the system messages synchronously transmitted. Otherwise, the UE does not receive the receiving gain when receiving the system message, and may cause strong co-frequency interference.
  • the following is a method for implementing MBSFN synchronization between multiple network elements in the related art. FIG.
  • FIG. 1 is a diagram showing an example of a UM-based MBMS service synchronization networking of TD-SCDMA and WCDMA according to the related art.
  • one of the primary radio network controllers Radio network controllers, RNC for short
  • RNC Radio network controllers
  • DRNC1 slave RNC1
  • FIG. 2 is a diagram showing an example of a HSPA+ Flat Architecture MBMS service synchronization networking according to the related art. As shown in FIG.
  • Multimedia gateway MGW Media GateWay, MGW for short
  • a logical network element for example, a Multi-cell/Multicast Coordination Entity (MCE)
  • MCE Multi-cell/Multicast Coordination Entity
  • E evolved universal terrestrial radio access network base stations Node B
  • evolved universal terrestrial radio access network base stations
  • a common control message of each cell for example, a system message, an MCCH channel message, and an MICH channel message are separately constructed and scheduled to be sent on each network element node, if the MBSFN area exceeds the cell of one network element. Scope, if there is no coordination mechanism between cells of multiple network elements, the radio interface control messages between these cells will be difficult or even impossible to achieve. Step.
  • the radio interface control message of the MBSFN cell will not be able to transmit and receive in the MBSFN mode, and bring about strong interference between adjacent cells.
  • the radio interface control message of the MBSFN cell will not be able to transmit and receive in the MBSFN mode, and bring about strong interference between adjacent cells.
  • SUMMARY OF THE INVENTION The present invention has been made in view of the lack of a coordination mechanism in the related art.
  • the main purpose of the present invention is to provide a synchronization scheme for a common control message between network elements, to solve the single frequency of the multimedia broadcast multicast service in the related art.
  • the multimedia broadcast multicast service carried out by the network method lacks the problem that the business cannot be performed due to ten adjustments.
  • a method for synchronizing common control messages between network elements is provided, which is applied to a network for performing multimedia broadcast multicast services in a multimedia broadcast multicast service single frequency network manner, where the networking includes a central network element. And at least one distributed network element.
  • the method includes: the central network element instructing the distributed network element to synchronously update the common control message of each specific cell of the distributed network element.
  • the central network element sends a first control plane message to instruct the distributed network element to update the common control message of each of the distributed network elements, where the first control plane message includes an update condition; and the distributed network element updates according to the first control plane message.
  • Common control message after the distributed network element receives the indication from the central network element correctly, before the update or after the update, the method may further include: the distributed network element returns a second control plane message to the central network element, indicating the distribution network The element successfully received the indication or successfully updated.
  • the distributed network element after the distributed network element receives the indication from the central network element, if the distributed network element cannot be updated correctly, the method may further include: the distributed network element returns a third control plane indicating that the update fails to the central network element. Message.
  • the foregoing update condition includes at least one of the following: an update time, specific target cell information for performing message update, where the specific target cell is a cell specified by the target cell information in all cells or update conditions.
  • the public control message may include at least one of the following: a system message, a multimedia broadcast multicast service point-to-multipoint control channel message, and a media broadcast multicast service notification indication channel message.
  • the update condition further includes at least one of the following: an information block list of the system message, an operation indication corresponding to the information block in the information block list.
  • the operation indication includes one of the following: deleting the information block; updating the information block and the updated data information, and further including scheduling information of the information block.
  • the update condition further includes at least one of the following: multimedia broadcast multicast service point-to-multipoint control channel message Update information, scheduling information of the multimedia broadcast multicast service point-to-multipoint control channel, and identification of the multimedia broadcast multicast service point-to-multipoint control channel.
  • the update condition further includes at least one of the following: the multimedia broadcast multicast service notification indication channel message update information, the multimedia broadcast group The broadcast service notification indicates the scheduling information of the channel.
  • the update time specifically includes one of the following: a wireless interface system frame number, a wireless interface connection frame number, a time, and a ten-time adjustment time in the group network element.
  • the target cell information is specifically at least one of the following: a cell identifier, a multimedia broadcast multicast service, a single frequency network synchronization area identifier, and a cell frequency point information.
  • the central network element sends the updated radio interface control plane common control message to the distributed network element by sending a user plane message, and the distributed network element updates the public control message of its specific specific cell according to the user plane message, and the user plane message includes the wireless
  • the common control message data processed by the network protocol layer and the time information indicating the common control message data contained therein are sent on the wireless interface.
  • the central network element is the primary control radio network controller
  • the distributed network element is the subordinate radio network controller
  • the networking belongs to the high-speed packet access power.
  • the central network element is the master Node B + and the distributed network element is the slave Node B +; or when the networking belongs to the long term evolution system, the central network element is a multi-cell/multicast coordination entity, and the distribution network The element is an evolved universal terrestrial radio access network Node B.
  • the central network element is used to instruct the distributed network element to synchronously update the common control message of each specific cell of the distributed network element, and the single frequency of the multimedia broadcast multicast service is solved.
  • the problem that the multimedia broadcast multicast service performed by the network mode cannot be performed due to the lack of coordination can realize the synchronous update and synchronous transmission of the common control messages between cells of different network elements.
  • FIG. 1 is a diagram of an MBMS synchronization networking in a UTRAN system according to the related art
  • FIG. 2 is a diagram of an MBMS synchronization networking in an HSPA+ flat architecture according to the related art
  • 3 is a block diagram of an MBMS synchronization network in an E-UTRAN architecture according to the related art
  • FIG. 1 is a diagram of an MBMS synchronization networking in a UTRAN system according to the related art
  • FIG. 2 is a diagram of an MBMS synchronization networking in an HSPA+ flat architecture according to the related art
  • 3 is a block diagram of an MBMS synchronization network in an E-UTRAN architecture according to the related art
  • FIG. 1 is a diagram of an MBMS synchronization networking in a UTRAN system according to the related art
  • FIG. 2 is a diagram of an MBMS synchronization networking in an HSPA+ flat architecture according to the related art
  • 3 is a block diagram of an MBMS synchronization network in
  • FIG. 4 is a schematic diagram of a distributed network element and a central network element in a method according to an embodiment of the present invention
  • FIG. FIG. 6 is a signaling flowchart of a processing example 1 of a method according to an embodiment of the present invention
  • FIG. 7 is a processing example of a method according to an embodiment of the present invention
  • 2 is a signaling flow chart of FIG. 8
  • FIG. 8 is a signaling flow chart of processing example 3 of the method according to an embodiment of the present invention
  • FIG. 9 is a signaling flow chart of processing example 4 of the method according to the embodiment of the present invention.
  • the present invention provides a method for synchronizing common control messages between network elements, which is applied to a multimedia broadcast multicast service single frequency network.
  • the networking of the broadcast multicast service includes a central network element and at least one distributed network element.
  • the method includes: the central network element instructing the distributed network element to synchronously update the common control message of each specific cell of the distributed network element.
  • An embodiment of the present invention provides a method for synchronizing common control messages between network elements, which is applied to a network for performing multimedia broadcast multicast services in a multimedia broadcast multicast service single frequency network manner. Including a central network element and at least one distributed network element, the logical structure of which can be as shown in FIG.
  • the embodiment of the present invention provides a method for synchronizing common control messages between network elements, which is applied to a multimedia broadcast multicast service in a multimedia broadcast multicast service single-frequency network manner, where the networking includes a central network element and at least A distributed network element.
  • 5 is a flowchart of a method for synchronizing common control messages between network elements according to an embodiment of the present invention.
  • a method for synchronizing common control messages between network elements according to an embodiment of the present invention includes: Step S502, The central network element instructs the distributed network element to synchronously update the common control message of each specific cell of the distributed network element.
  • the distributed network element performs update.
  • the central network element sends a first control plane message to instruct the distributed network element to update the common control message of each of the distributed network elements, where the first control plane message includes an update condition; and the distributed network element updates according to the first control plane message.
  • Common control message after the distributed network element receives the indication from the central network element correctly, before the update or after the update, the method may further include: the distributed network element returns a second control plane message to the central network element, indicating the distribution network The element successfully received the indication or successfully updated.
  • the distributed network element after the distributed network element receives the indication from the central network element, if the distributed network element cannot be updated correctly, the method may further include: the distributed network element returns a third control plane message indicating that the update fails to the central network element. .
  • the update condition may include at least one of the following: update time, specific target cell information for performing message update, where the specific target cell is a cell specified by the target cell information in all cells or update conditions.
  • the public control message may include at least one of the following: a system message, a multimedia broadcast multicast service point-to-multipoint control channel message, and a media broadcast multicast service notification indication channel message.
  • the update condition further includes at least one of the following: an information block list of the system message, an operation indication corresponding to the information block in the information block list.
  • the operation indication includes one of the following: deleting the information block; updating the information block and the updated data information, and further including scheduling information of the information block.
  • the update condition further includes at least one of the following: multimedia broadcast multicast service point-to-multipoint control channel message Update information, multimedia broadcast multicast service point-to-multipoint control Scheduling information of the channel, the identification of the multimedia broadcast multicast service point-to-multipoint control channel.
  • the update condition further includes at least one of the following: the multimedia broadcast multicast service notification indication channel message update information, the multimedia broadcast group The broadcast service notification indicates the scheduling information of the channel.
  • the update time may specifically include one of the following: a wireless interface system frame number, a wireless interface connection frame number, a time, and a ten-time adjustment time in the group network element.
  • the target cell information is specifically at least one of the following: a cell identifier, a multimedia broadcast multicast service, a single frequency network synchronization area identifier, and a cell frequency point information.
  • the central network element sends the updated radio interface control plane common control message to the distributed network element by sending a user plane message, and the distributed network element updates the public control message of its specific specific cell according to the user plane message, and the user plane message includes the wireless
  • the common control message data processed by the network protocol layer and the time information indicating the common control message data contained therein are sent on the wireless interface. That is, through a one-to-one signaling process between a central network element in the networking and each distributed network element, the central network element indicates that one or more distributed network elements are in the same target cell, in the same At the moment, the same common control message content is updated synchronously.
  • Common Control Message Common Control Message Common Control Message Common Control Message.
  • the central network element is the primary control radio network controller, the distributed network element is the subordinate radio network controller, or the networking belongs to the high-speed packet access power.
  • the central network element is the master Node B + and the distributed network element is the slave Node B +; or when the networking belongs to the long term evolution system, the central network element is a multi-cell/multicast coordination entity, and the distribution network The element is an evolved universal terrestrial radio access network Node B.
  • one central network element and one or more distributed network elements may be the same network element in physical function, or may be different network elements, and are divided into a central network element and a distributed network element only for cooperation.
  • the central network element and the distributed network element may be a combination of the following network elements, but Not limited to the following combinations:
  • the central network element is the primary RNC
  • the distributed network element is the subordinate RNC
  • the interface between the central network element and the distributed network element is the Iur interface. That is, as shown in Figure 1.
  • the central network element and the distributed network element are network elements with the same physical function.
  • the central network element is the RNC or the master Node B +
  • the distributed network element is the slave ( slave ) Node B + , between the central network element and the distributed network element.
  • the interface is the Iur interface, as shown in Figure 2.
  • the central network element and the distributed network element are network elements with the same physical function.
  • the central network element is the MCE
  • the distributed network element is the evolved UTRAN Node B (ENB)
  • the interface between the central network element and the distributed network element is the M2 interface, that is, Figure 3 shows the mouth.
  • EMBMS evolved UTRAN Node B
  • FIG. 6 is a signaling flowchart of the processing example 1 of the method according to the embodiment of the present invention. As shown in FIG.
  • Step 601 The central network element sends a first control plane message of the control plane message to one or more distributed network elements.
  • the content carried by the message includes part or all of the following information: system message update information, system message update time, update target cell, if the target cell belongs to the same MBSFN synchronization area, the message sent to each distributed network element has the same Update time information, system message update information;
  • the network element responds to the central network element that it has correctly received the first control plane message; the distributed network element updates the system message of the target cell at the time specified by the system message update time according to the content carried by the first control plane message.
  • the following content ie, the above update condition
  • System message update time T This information specifies the update time of the system message, that is, the system message update information carried in the message.
  • the time can be the following two ways: The system frame number SFN of the wireless interface; (b) an absolute time value; (c) a coordinated time for other central network elements and distributed network elements;
  • Target cell information of system message update This information specifies which target cell or cells are updated in the system message update information carried by the message.
  • the information may be expressed in the following manners: (a) the identity of the target cell, (b) the MBSFN synchronization area i or the identity, in which case the system message update information carried by the message is in all cells in the MBSFN synchronization area. Internally updated, (c) the frequency point information of the cell, in which case the system message update information carried by the message is updated in all cells specified by the frequency point;
  • Update information of the system message The information may further include a list of information blocks (IB), operation indication information of each information block in the list.
  • the operation indication referred to here may be (a) deleting the information block, and (b) not deleting the information block (update information block). If the operation is not deleting the information block, each item of the list further includes the following contents: (1) the data content of the information block, where the data content may be several pieces of piecewise data information of one information block, or one complete Data information of the information block; (2) scheduling information of the information block.
  • the scheduling information mentioned herein includes the repetition period information of the information block, and further includes one of the following information: (1) if the information block is segmented, including location information of each segment within one repetition period; 2) mapping information of each information block in a scheduling unit; (3) or other scheduling information if the information block is transmitted.
  • the above system message block includes, but is not limited to, all of the following information block types or "means: Master Information Block (MIB), System Information Block 3 (SIB3), system Information block 5 (system information block 5, SIB5, ), system information block 11 (SIB 11).
  • MIB Master Information Block
  • SIB3 System Information Block 3
  • SIB 5 system information block 5
  • SIB 11 system information block 11
  • the distributed network element updates the system message of the target cell, which refers to the following situation.
  • the distributed network element is the RNC, and the distributed network element sends the Iub message to the Node B where the target cell is located, and carries the corresponding system message update information, and the system message update time information; (2) the distributed network element is If the ENB or Node B+ or other similar network element, the distributed network element directly updates the system message of the target cell, and starts to send on the wireless interface at the update time.
  • the central network element sends the first control plane message to the distributed network element in the following situations: (1) when the central network element needs to update the system message of the MBSFN cell on the distributed network element; (2) the distributed network element passes The control plane message indicates the central network element, which requires the central network element to update the system message of its MBSFN cell.
  • Example 2 MCCH channel message synchronization
  • the central network element and each distributed network element are used.
  • the interface between the central network element and each of the distributed network elements performs the update process of the control plane information.
  • FIG. 7 is a signaling flowchart of the processing example 2 of the method according to the embodiment of the present invention. As shown in FIG. The following steps 701 to 702 are included: Step 701: The central network element sends a first control plane message to one or more distributed network elements.
  • the content carried by the message includes part or all of the following information: MCCH message update information, MCCH message update time information, MCCH channel scheduling information, target cell information, target MCCH channel information, if the target cell belongs to the same MBSFN synchronization area, then The messages to the target cells have the same MCCH message update time information and MCCH message update information.
  • Step 702 Each distributed network element correctly receives the first control plane message, and responds to the message respectively through an interface with the central network element. a second control plane message, the message is used by the distributed network element to respond to the central network element that the first control plane message has been correctly received.
  • the distributed network element updates the time information according to the MCCH according to the content carried by the first control plane message.
  • MCCH channel scheduling information updating the MCCH message in the target cell.
  • at least one of the following contents may be carried:
  • MCCH message update time information that is, the MCCH update information carried by the message starts at the time when the radio interface of the target cell starts to be updated, and the time may be one of the following ways: System frame number SFN of the wireless interface; Time value; the radio interface connection frame number CFN of the FCH channel mapped by the MCCH; indicating that the first modification period starts to be updated after receiving the message; or other central network elements and the distributed network element ten times are consistent;
  • Target cell information specifies which target cell or cells are updated by the MCCH message update information carried in the message.
  • the information may be expressed in the following manners: (a) an identifier of one or more target cells; (b) an MBSFN synchronization area identifier, in which case the MCCH message update information carried by the message is in the MBSFN synchronization area.
  • MCCH channel scheduling information including MCCH repetition period information, and/or MCCH modification period information
  • Target MCCH channel information This information specifies that the MCCH channel identifier needs to be updated.
  • the central network element when the central network element needs to update the MCCH message of the MBSFN cell on one or more distributed network elements, it refers to one of the following situations: (1) The central network element periodically sends according to the MCCH modification period. The first control plane message is sent to each distributed network element; (2) the central network element periodically sends the first control plane message to each distributed network element according to the MCCH repetition period; (3) the central network element is in the MCCH message, or the MCCH scheduling When the information changes, the first control plane message is sent to each distributed network element; (4) The distributed network element indicates the central network element, and the MCCH message needs to be updated.
  • the distributed network element updates the MCCH message of the target cell, which refers to one of the following situations: (a) The distributed network element is an RNC, and the distributed network element performs radio link control on the received MCCH message. After (RLC), media access control (MAC), and FP protocol layer processing, it is sent to the Node B where the target cell is located through the Iub interface; (b) the distributed network element is ENB or Node B+ or other similar network element, After the distributed network element performs the RLC, MAC, and radio interface physical protocol layer processing on the received MCCH message, the wireless interface sends the MCCH message.
  • RLC radio link control
  • MAC media access control
  • FP protocol layer processing it is sent to the Node B where the target cell is located through the Iub interface
  • the distributed network element is ENB or Node B+ or other similar network element, After the distributed network element performs the RLC, MAC, and radio interface physical protocol layer processing on the received MCCH message, the wireless interface sends the MCCH
  • Example 3 MICH channel message synchronization
  • the central network element when the central network element needs to update the MICH channel message of the MBSFN cell on one or more distributed network elements, the central network element and each distribution network The interface between the elements, the central network element and each of the distributed network elements perform the update process of the control plane information.
  • FIG. 8 is a signaling flowchart of the processing example 3 of the method according to the embodiment of the present invention, as shown in FIG. The process specifically includes the following steps 801 to 802: Step 801: The central network element sends a first control plane message to one or more distributed network elements.
  • the content carried by the message includes part or all of the following information: MICH message update information, MICH The message update time information, the MICH channel scheduling information, the target cell information, and the target MICH channel information. If the target cells belong to the same MBSFN synchronization area, the messages sent to the target cells have the same MICH message update time information and MICH message update information.
  • Step 802 Each distributed network element correctly receives the first control plane message, and responds to the message second control plane message by using an interface with the central network element, where the message is used to distribute the network element direction
  • the central network element responds that it has correctly received the first control plane message; the distributed network element updates the MICH channel message in the target cell according to the MICH update time information and the MICH channel scheduling information according to the content carried by the first control plane message.
  • the following content is carried:
  • the MICH message update time information that is, the MICH update information carried by the message is started at the time when the radio interface of the target cell starts to be updated, and the time may be one of the following ways: (1) a system frame number SFN of the wireless interface; (2) an absolute time value; (3) indicating that the first tampering period begins to update after receiving the message; (4) or other central network element and the distributed network element coordinate time;
  • Target cell information specifies which target cell or cells are updated by the MICH message update information carried in the message.
  • the information may be expressed in the following manners: (a) an identifier of one or more target cells; (b) an MBSFN synchronization area identifier, in which case the MICH message update information carried by the message is in the MBSFN synchronization area. All intra-cell updates; (c) frequency information of the cell, in which case the MICH update information carried by the message is updated in all cells specified by the frequency point;
  • MICH channel scheduling information includes MICH channel modification period information.
  • the central network element needs to update the MICH message of the MBSFN cell on one or more distributed network elements, it refers to one of the following situations: The central network element periodically sends the first control plane message to each distribution according to the MICH modification period. The network element; when the MICH message needs to be changed; when the MICH channel scheduling information changes; the distributed network element indicates the central network element, and the MICH message needs to be updated.
  • the distributed network element updates the MICH message of the target cell, which means One of the following cases: the distributed network element is the RNC, and the distributed network element sends the received MICH channel update information, the MICH channel scheduling information, and the MICH update time information to the Node B where the target cell is located through the Iub interface control plane message; If the distributed network element is ENB or Node B+ or other similar network element, the distributed network element starts to update the MICH channel message according to the scheduling period at the time specified by the update time.
  • Example 4 In this example, the processing in the case where the update failed is described.
  • FIG. 9 is a signaling flowchart of a processing example 4 of a method according to an embodiment of the present invention. As shown in FIG.
  • Step 901 Update a distributed network element in a central network element.
  • the central network element sends the first control plane message of the control plane message to one or more distributed network elements through the interface at both times.
  • the content carried by the message includes: public control message update information, update time information, update target cell, if the target cell belongs to the same MBSFN synchronization area, the message sent to each distributed network element has the same update time information, public control Message update information.
  • Step 902 The distributed network element receives the first control plane message, and if the processing fails, responds to the message third control plane message by using an interface with the central network element, indicating that the central network element cannot process the public control message update request.
  • the message carries the reason for the failure.
  • the invention will be described below for the user's face.
  • the central network element when the central network element needs to synchronously send the common control message to the MBSFN cell on one or more distributed network elements, the central network element will be carried by the user plane between the central network element and each distributed network element.
  • the public control message processed by the wireless network user plane protocol is sent to each distributed network element.
  • a user plane transport payload is established between the central network element and one or more distributed network elements, and is used to carry the public control message that needs to be sent synchronously. data.
  • the central network element constructs a common control message content, performs wireless network protocol layer user plane processing, and marks the message data with time information, and identifies the time it transmits on the wireless interface.
  • the central network element transmits the common control message data and the transmission time information to one or more distributed network elements by distributing the user plane transmission bearers between the network elements.
  • a distributed network element that receives the public control message data and its time, and follows the message Afterwards, at the time specified by the timestamp, the common control message data is sent on the cell radio interface that needs to send the common control message.
  • the user plane processing of the wireless network protocol refers to one of the following ways: 1) the central network element performs a radio link control layer (RLC) on the common control message, and marks the time of the output RLC PDU, Then, in the form of a Frame Protocol (FP) frame, the transmission between the central network element and the distributed network element is transmitted to one or more distributed network elements.
  • the distributed network element reads the RLC PDU in the FP frame and performs the MAC protocol layer processing, and performs subsequent processing.
  • the central network element performs the radio link control layer RLC and the medium access control layer MAC processing on the common control message.
  • the output MAC PDU is marked with time, and then transmitted to one or more distributed network elements through the transmission between the central network element and the distributed network element in the form of a frame protocol FP frame.
  • the distributed network element reads the MAC PDU in the FP frame for subsequent processing.
  • the timestamp information mentioned above specifies the time when the related common control message data is sent on the wireless interface in the following manner: (1) system frame number SFN of the wireless interface, (2) connection frame of the wireless interface No. CFN, (3) Absolute time value.
  • the central network element When the central network element needs to send a common control message by the MBSFN cell on one or more distributed network elements, it refers to one of the following situations: (a) The central network element periodically sends a public control message by using the above method to Each of the distributed network elements; (b) the central network element sends the public control message data to each of the distributed network elements when the public control message or the public control message scheduling information changes.
  • the distributed network element performs subsequent processing on the MCCH message data, and also includes one of the following situations:
  • the distributed network element is the RNC, and the distributed network element sends the common control message data processed by the MAC protocol to the Node B through the Iub interface in the form of an FP frame;
  • the distributed network element is ENB or Node B + or
  • the distributed network element is sent to the radio interface after being processed by the radio interface physical protocol layer through the common control message data.

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

Description

网元间公共控制消息的同步方法
技术领域 本发明涉及通信领域, 并且特别地, 涉及一种网元间公共控制消息的同 步方法。 背景技术 现在人们对移动通信的需求已不再仅限于电话和消息业务,随着因特网 ( Internet ) 的迅猛发展, 大量多媒体业务涌现出来。 其中一些应用业务, 多 个用户能同时接收相同数据, 如视频点播、 电视广播、 视频会议、 网上教育、 互动游戏等。 多媒体广播组播业务 ( Multimedia Broadcast Multicast Service, 简称为 MBMS )技术为实现最有效地利用移动网络资源而提出, 指一个数据 源向多个用户发送数据的点到多点业务, 实现网络资源共享, 包括移动核心 网和接入网资源共享, 尤其是空口资源。 第三代移动通讯伙伴计划 (3rd Generation partnership project, 简称为 3GPP )定义的 MBMS不仅能实现纯文 本低速率的消息类组播和广播,而且能实现高速率的多媒体业务组播和广播, 这无疑顺应了未来移动数据发展的趋势。 作为一种提高 MBMS业务频 i普利用率的技术, MBMS单频网 (MBMS Single Frequency Network, 简称为 MBSFN )技术, 要求所有相邻基站同步发 送相同的无线信号, 用户设备 ( user equipment , 简称为 UE ) 可以将来自于 不同基站的信号视为多径信号。 使得公共物理信道传送广播业务获得比较大 的信号增益, 从而提高了 MBMS业务的服务质量 (Quality of Service, 简称 为 QoS )性能。在同步发送 MBMS业务无线信号的一组小区组成 MBSFN同 步区 i或, 这些小区称为 MBSFN小区。 在 MBSFN同步区 i或内的小区, 同步 发送相同的无线信号, 包括 MBMS 业务信号, 和全部或者部分的系统消息 内容、点到多点控制信道消息( MCCH消息)、 MBMS通知指示信道 ( MICH ) 消息。 在 3GPP UTRAN架构协议中, 系统消息由信息块 ( IB ) 组成, 信息块 在功能上分为主信息块(MIB ), 调度信息块, 系统信息块。 这些信息块在无 线接口传输时, 又分为若干个分段 Segment, 这些分段按照其类型又分为第 一个分段、 中间分段、 最后一个分段、 完整分段等等类型, 并按照调度进行 发送。 每个分段的发送时刻可以由下列公式确定: SFN 取模 重复周期=分 段位置。 在 3GPP长期演进 ( Long Term Evolution, 简称为 LTE ) 架构中, 信心 块的调度故了如下的变化: 定义了调度单元 ( Scheduling Unit, 简称为 SU ), 一个或者多个信息块映射到一个调度单元中。 按照 3GPP现有协议的定义, MCCH为逻辑信道, MCCH信道消息包 括一系列 MBMS业务控制消息, 其调度信息包括: 修改周期, 和重复周期, 在一个修改周期内, MCCH消息按照重复周期多次在无线接口发送, 但是其 内容在修改周期内不能修改。 从同步的要求出发, 显然每个小区的重复周期 和爹改周期应该保持一致。 按照 3GPP现有十办议的定义, MICH 为物理信道, 用于通知 UE有关 MBMS业务在 MCCH信道消息中的变化。 下列是已知的釆用 MBSFN载频的组网技术: 在时分同步码分多址 ( TD-SCDMA ) 技术中, 釆用了一种 MBSFN 专 用载频的组网技术, 该技术在一个频点内的各个时隙的所有物理信道, 均和 相邻小区的相想用频点、 时隙和物理信道保持内容和时间的同步, 其中, 相 邻小区的系统消息、 MCCH信道消息、 MICH信道也需要同步发送。 在宽带码分多址 ( WCDMA ) 技术中, 对釆用了 MBSFN组网的小区, 要求小区内所有信道的信号均和相邻小区的相同频点、 物理信道保持内容和 时间的同步, 其中相邻小区的系统消息、 MCCH信道消息、 MICH信道也需 要同步发送。 在频分双工 ( Frequency Division Duplex, 简称为 FDD ) 高速分组接入 力口 ( High Speed Packet Access Plus, 简称为 HSPA+ ) 中, 对釆用了 MBSFN 组网的小区, 要求小区内所有信道的信号均和相邻小区的相同频点、 物理信 道保持内容和时间的同步, 其中相邻小区的系统消息、 MCCH 信道消息、 MICH信道也需要同步发送。 在 LTE 系统中, 对釆用 MBSFN组网的小区, 在相同的频点上的相同 无线资源块上, 各个小区要求同步发送相同的无线信号, 其系统消息分为全 局系统消息和本地的系统消息, 其中, 相邻小区的全局系统消息、 MCCH MBSFN区域内的 MCCH信道需要同步发送。 在上述的多种技术中,均涉及到相邻小区需要同步发送全部或者部分的 无线接口控制消息。 并且, MBMS业务是面向全网的服务, 同一个 MBMS业务可能建立在 不同分布网元节点上。 这样, 在不同分布网元节点间的小区, 也需要保持其 全部或者部分系统消息的同步发送, 否则 UE接收系统消息时得不到接收增 益, 并可能造成强烈的同频干 ·ί尤。 下面为相关技术中实现多个网元间的 MBSFN同步的方法。 图 1是才艮据相关技术的 TD - SCDMA、 WCDMA的 UTRAN架构 MBMS 业务同步组网示例图。 如图 1 所示, 其中一个主控无线网络控制器 (Radio network controller , 简称为 RNC ) 和多个从属 RNC之间通过 lur接口连接, 主控 RNC ( SRNC )和从属 RNC1 ( DRNC1 )通过 Iu接口与服务通用分组无 线业务支持节点 ( Serving General Packet Radio Service Supporting Node, 简 称为 SGSN ) -1相连接, 从属 RNCn ( DRNCn )通过 Iu接口与 SGSN-2相连 接,从属 RNC1与基站 -1 ( NodeB-1 )相连接, 主控 RNC与基站 -2 ( NodeB-2 ) 相连接, 从属 RNCn与基站 -3 ( NodeB-3 )相连接。 图 2是才艮据相关技术的 HSPA +扁平架构( Flat Architecture ) MBMS业 务同步组网示例图。 如图 2所示, 其中一个主基站 + ( master Node B+ ) 网元 (或 RNC)和一个或多个从属基站 + ( slave Node B+ )通过 lur接口连接, Master NodeB +或者 RNC 与 SGSN— 1 相连接。 MGW 为多媒体网关 (Media GateWay , 简称为 MGW )0 图 3是才艮据相关技术的 LTE的 E _ UTRAN架构下 MBMS业务同步组 网示例图。 如图 3 所示, 逻辑网元 (例如, 多小区多播协调实体 ( Multi-cell/multicast Coordination Entity, 简称为 MCE ) )和一个或多个演进 的通用陆地无线接入网络基站 Node B ( E-UTRAN Node B , 简称为 ΕΝΒ )通 过 Μ2接口连接。 在现有技术中, 每个小区的公共控制消息, 例如, 系统消息、 MCCH 信道消息、 MICH信道消息分别在各个网元节点上分别构建并调度发送, 如 果 MBSFN区域超过了一个网元的小区的范围, 多个网元的小区间如果没有 一种协调机制, 那么这些小区间的无线接口控制消息将很难甚至无法实现同 步。 对 UE来说, MBSFN小区的无线接口控制消息将不能实现 MBSFN方式 收发, 并且带来相邻小区间的强烈干 4尤。 而现有技术中, 在多个协调发送 MBMS业务的同层次网元间, 缺少在 例如主控 RNC和从属 RNC直接、 LTE中的 MCE和 ENB之间进行十办调的技 术方案, 针对相关技术中缺少协调机制的问题, 目前尚未提出有效的解决方 案。 发明内容 考虑到相关技术中缺少协调机制而做出本发明, 为此, 本发明的主要目 的在于提供一种网元间公共控制消息的同步方案, 以解决相关技术中多媒体 广播组播业务单频网方式进行的多媒体广播组播业务缺少十办调而导致的业务 无法进行的问题。 根据本发明的实施例, 提供了一种网元间公共控制消息的同步方法, 应 用于以多媒体广播组播业务单频网方式进行多媒体广播组播业务的组网, 组 网包括一个中心网元和至少一个分布网元。 该方法包括:中心网元指示分布网元对分布网元各自特定小区的公共控 制消息进行同步更新。 其中,中心网元发送第一控制面消息来指示分布网元对分布网元各自的 公共控制消息进行更新, 第一控制面消息中包含更新条件; 分布网元才艮据第 一控制面消息更新公共控制消息。 并且, 在分布网元正确接收到来自中心网元的指示之后, 在进行更新之 前、 或者成功更新之后, 该方法可进一步包括: 分布网元向中心网元返回第 二控制面消息, 指示分布网元成功接收指示或成功更新。 另一方面, 在分布网元接收到来自中心网元的指示之后, 如果该分布网 元不能正确进行更新, 该方法可进一步包括: 分布网元向中心网元返回指示 更新失败的第三控制面消息。 其中, 上述更新条件包括以下至少之一: 更新时间、 进行消息更新的特 定目标小区信息, 其中, 特定目标小区为全部小区或更新条件中目标小区信 息所指定的小区。 上述公共控制消息可以包括以下至少之一: 系统消息、 多媒体广播组播 业务点到多点控制信道消息、 媒体广播组播业务通知指示信道消息。 其中, 在需要更新的公共控制消息为系统消息的情况下, 更新条件进一 步包括以下至少之一: 系统消息的信息块列表、 对应于信息块列表中的信息 块的操作指示。 并且, 该操作指示包括以下之一: 删除信息块; 更新信息块 及更新后的数据信息, 其中还包括信息块的调度信息。 另一方面,在需要更新的公共控制消息为多媒体广播组播业务点到多点 控制信道消息的情况下, 更新条件进一步包括以下至少之一: 多媒体广播组 播业务点到多点控制信道消息的更新信息、 多媒体广播组播业务点到多点控 制信道的调度信息、 多媒体广播组播业务点到多点控制信道的标识。 再一方面,在需要更新的公共控制消息为多媒体广播组播业务通知指示 信道消息的情况下, 更新条件进一步包括以下至少之一: 多媒体广播组播业 务通知指示信道消息的更新信息、 多媒体广播组播业务通知指示信道的调度 信息。 此夕卜, 更新时间具体包括以下之一: 无线接口系统帧号、 无线接口连接 帧号, 时刻、 组网元内的十办调时间。 此外, 目标小区信息具体为以下至少之一: 小区标识、 多媒体广播组播 业务单频网同步区域标识、 小区频点信息。 优选地,中心网元通过发送用户面消息发送更新的无线接口控制面公共 控制消息到分布网元, 分布网元根据用户面消息更新其各自的特定小区的公 共控制消息, 用户面消息包含经过无线网路协议层处理后的公共控制消息数 据和指示其包含的公共控制消息数据在无线接口发送的时间 信息。 可选地, 在组网属于通用陆地无线接入网的情况下, 中心网元为主控无 线网络控制器, 分布网元为从属无线网络控制器; 或在组网属于高速分组接 入力。系统的情况下, 中心网元为主控 Node B + , 分布网元为从属 Node B +; 或在组网属于长期演进系统的情况下, 中心网元为多小区 /多播协调实体, 分 布网元为演进的通用陆地无线接入网络 Node B。 通过本发明的上述技术方案,釆用中心网元指示分布网元对分布网元各 自特定小区的公共控制消息进行同步更新, 解决了多媒体广播组播业务单频 网方式进行的多媒体广播组播业务缺少协调而导致的业务无法进行的问题, 从而实现了可以在不同网元间小区间实现公共控制消息的同步更新和同步发 送。 附图说明 此处所说明的附图用来提供对本发明的进一步理解,构成本申请的一部 分, 本发明的示意性实施例及其说明用于解释本发明, 并不构成对本发明的 不当限定。 在附图中: 图 1是才艮据相关技术的 UTRAN系统下的 MBMS同步组网的才匡图; 图 2是才艮据相关技术的 HSPA +扁平架构下 MBMS同步组网的才匡图; 图 3是才艮据相关技术的 E-UTRAN架构下 MBMS同步组网的框图; 图 4是才艮据本发明实施例的方法中分布网元与中心网元的逻辑示意图; 图 5是根据本发明实施例的网元间公共控制消息的同步方法的流程图; 图 6是根据本发明实施例的方法的处理实例 1的信令流程图; 图 7是根据本发明实施例的方法的处理实例 2的信令流程图; 图 8是根据本发明实施例的方法的处理实例 3的信令流程图; 以及 图 9是才艮据本发明实施例的方法的处理实例 4的信令流程图。 具体实施方式 功能相无述 考虑到相关技术中缺少协调机制的问题,本发明实施例提供了一种网元 间公共控制消息的同步方法, 应用于以多媒体广播组播业务单频网方式进行 多媒体广播组播业务的组网, 组网包括一个中心网元和至少一个分布网元。 该方法包括: 中心网元指示分布网元对分布网元各自特定小区的公共控制消 息进行同步更新。 本发明的实施例提供了一种网元间公共控制消息的同步方法,应用于以 多媒体广播组播业务单频网方式进行多媒体广播组播业务的组网, 该组网包 括一个中心网元和至少一个分布网元, 其逻辑架构可如图 4所示。 本发明的实施例提供了一种网元间公共控制消息的同步方法,应用于以 多媒体广播组播业务单频网方式进行多媒体广播组播业务的组网, 组网包括 一个中心网元和至少一个分布网元。 图 5是根据本发明实施例的网元间公共控制消息的同步方法的流程图, 如图 5所示, 才艮据本发明实施例的网元间公共控制消息的同步方法包括: 步 骤 S502, 中心网元指示分布网元对分布网元各自特定小区的公共控制消息进 行同步更新; 步骤 S504, 分布网元进行更新。 其中,中心网元发送第一控制面消息来指示分布网元对分布网元各自的 公共控制消息进行更新, 第一控制面消息中包含更新条件; 分布网元才艮据第 一控制面消息更新公共控制消息。 并且, 在分布网元正确接收到来自中心网元的指示之后, 在进行更新之 前、 或者成功更新之后, 该方法可进一步包括: 分布网元向中心网元返回第 二控制面消息, 指示分布网元成功接收指示或成功更新。 另一方面, 在分布网元接收到来自中心网元的指示之后, 如果该分布网 元不能正确进行更新, 则可以进一步包括: 分布网元向中心网元返回指示更 新失败的第三控制面消息。 此外, 更新条件可以包括以下至少之一: 更新时间、 进行消息更新的特 定目标小区信息, 其中, 特定目标小区为全部小区或更新条件中目标小区信 息所指定的小区。 上述公共控制消息可以包括以下至少之一: 系统消息、 多媒体广播组播 业务点到多点控制信道消息、 媒体广播组播业务通知指示信道消息。 其中, 在需要更新的公共控制消息为系统消息的情况下, 更新条件进一 步包括以下至少之一: 系统消息的信息块列表、 对应于信息块列表中的信息 块的操作指示。 并且, 该操作指示包括以下之一: 删除信息块; 更新信息块 及更新后的数据信息, 其中还包括信息块的调度信息。 另一方面,在需要更新的公共控制消息为多媒体广播组播业务点到多点 控制信道消息的情况下, 更新条件进一步包括以下至少之一: 多媒体广播组 播业务点到多点控制信道消息的更新信息、 多媒体广播组播业务点到多点控 制信道的调度信息、 多媒体广播组播业务点到多点控制信道的标识。 再一方面,在需要更新的公共控制消息为多媒体广播组播业务通知指示 信道消息的情况下, 更新条件进一步包括以下至少之一: 多媒体广播组播业 务通知指示信道消息的更新信息、 多媒体广播组播业务通知指示信道的调度 信息。 此外, 更新时间具体可以包括以下之一: 无线接口系统帧号、 无线接口 连接帧号、 时刻、 组网元内的十办调时间。 此外, 目标小区信息具体为以下至少之一: 小区标识、 多媒体广播组播 业务单频网同步区域标识、 小区频点信息。 优选地,中心网元通过发送用户面消息发送更新的无线接口控制面公共 控制消息到分布网元, 分布网元根据用户面消息更新其各自的特定小区的公 共控制消息, 用户面消息包含经过无线网路协议层处理后的公共控制消息数 据和指示其包含的公共控制消息数据在无线接口发送的时间 信息。 也就是说,通过组网中的一个中心网元和每个分布网元之间的一对一的 信令过程, 中心网元指示一个或多个分布网元在指定的目标小区、 在相同的 时刻, 同步更新相同公共控制消息内容。 公共控制消息公共控制消息公共控 制消息。 可选地, 在组网属于通用陆地无线接入网的情况下, 中心网元为主控无 线网络控制器, 分布网元为从属无线网络控制器; 或在组网属于高速分组接 入力。系统的情况下, 中心网元为主控 Node B + , 分布网元为从属 Node B +; 或在组网属于长期演进系统的情况下, 中心网元为多小区 /多播协调实体, 分 布网元为演进的通用陆地无线接入网络 Node B。 应当注意,这里的一个中心网元和一个或多个分布网元在物理功能上可 以是相同的网元, 也可以是不同的网元, 将其分为中心网元和分布网元只是 为了协作完成无线接口公共控制这样一个功能, 从逻辑上进行的划分, 即, 将若干个相同或不同的物理网元才艮据逻辑上的功能划分为一个中心网元和若 干个分布网元, 这些网元协同合作实现在分布网元小区以 MBSFN方式发送 MBMS业务。 在本发明中, 中心网元和分布网元可以是下列网元的组合方式, 但是并 不限于下列组合:
1、 在通用陆地无线接入网 (UTRAN ) 系统的 MBMS业务同步组网中, 中心网元为主控 RNC, 分布网元为从属 RNC, 中心网元和分布网元间的接 口为 Iur接口, 即, 如图 1所示。 在该组合中, 中心网元和分布网元为物理 功能相同的网元。
2、 在 HSPA +的 MB MS业务同步组网中, 中心网元为 RNC或者主控 ( master ) Node B + , 分布网元为从属 ( slave ) Node B + , 中心网元和分布 网元间的接口为 Iur接口, 即如图 2所示。 在该组合中, 中心网元和分布网 元为物理功能相同的网元。
3、 在 LTE系统的 MBMS业务同步组网中, 中心网元为 MCE, 分布网 元为演进的 UTRAN Node B ( ENB ), 中心网元和分布网元间的接口为的接 口为 M2接口, 即 口图 3所示。 下面将结合具体的实例描述本发明。 实例 1 : 系统消息更新 在一组网元中, 中心网元需要更新一个或多个分布网元上的 MBSFN小 区的系统消息时, 通过中心网元和每个分布网元间的接口, 中心网元和每个 分布网元进行控制面信息的更新过程, 图 6是根据本发明实施例的方法的处 理实例 1的信令流程图, 如图 6所示, 该流程具体包括如下的步骤 601至步 骤 602: 步骤 601 , 中心网元向一个或者多个分布网元发送控制面消息第一控制 面消息。 该消息携带的内容包括下列信息的部分或者全部: 系统消息更新信 息, 系统消息更新时间, 更新目标小区, 如果目标小区属于同一个 MBSFN 同步区域, 则发送到每个分布网元的消息具有相同的更新时间信息、 系统消 息更新信息; 步骤 602, 每个分布网元正确接收到第一控制面消息, 通过与中心网元 之间的接口, 分别回应消息第二控制面消息, 该消息用于分布网元向中心网 元响应其已经正确地接收到第一控制面消息; 分布网元根据接收到第一控制 面消息携带的内容, 在系统消息更新时间指定的时刻, 更新目标小区的系统 消息。 在上述的第一控制面消息中, 可以携带的如下的内容(即, 上述的更新 条件):
1、 系统消息更新时间 T: 该信息指定系统消息的更新时间, 也就是该 消息携带的系统消息更新信息, 在目标小区的无线接口开始更新的时刻, 该 时间可以是以下两种方式: (a ) 无线接口的系统帧号 SFN; ( b ) —个绝对时 间值; ( c ) 为其它的中心网元和分布网元协调一致的时间;
2、 系统消息更新的目标小区信息: 该信息指定了该消息携带的系统消 息更新信息在哪个或者哪些目标小区进行更新。 该信息可以表现为如下的几 种方式: ( a ) 目标小区的标识, ( b ) MBSFN同步区 i或标识, 在这种情况下, 该消息携带的系统消息更新信息在 MBSFN同步区域内所有小区内更新,( c ) 小区的频点信息, 在这种情况下, 该消息携带的系统消息更新信息在该频点 指定的所有小区内更新;
3、 系统消息的更新信息: 该信息可以进一步包括, 信息块( Information Block, IB )的列表, 该列表的内的每个信息块的操作指示信息。 这里所说的 操作指示可以是(a ) 删除该信息块, (b ) 不删除该信息块 (更新信息块)。 如果操作为不删除信息块, 则该列表的每个项还包括以下内容: (1 )信息块 的数据内容, 这里的数据内容, 可以是一个信息块的若干个分段数据信息, 或者一个完整的信息块的数据信息; (2 ) 信息块的调度信息。 这里所说的调 度信息, 包括信息块的重复周期信息, 还包括以下信息的一种: (1 ) 如果信 息块是分段的, 则包括每个分段在一个重复周期内的位置信息; ( 2 )每个信 息块在在调度单元( scheduling Unit ) 内的映射信息; (3 )或者其它定义信息 块如果发送的调度信息。 在该实例中,上述系统消息块包括但不限于下列的信息块类型的全部或 者"^分: 主信息块(Master Information Block, MIB )、 系统信息块 3 ( system information block 3 , SIB3 ),系统信息块 5( system information block 5 , SIB5, ), 系统信息块 11 ( system information block 11 , SIB 11 )。 在本实例的步骤 602中, 分布网元更新目标小区的系统消息, 是指如下 情况的一种: ( 1 )分布网元为 RNC , 则分布网元发送 Iub消息到目标小区所 在的 Node B , 并携带相应的系统消息更新信息, 和系统消息更新时间信息; ( 2 )分布网元为 ENB或者 Node B +或者其它类似的网元, 则分布网元直接 更新目标小区的系统消息, 并在更新时间开始在无线接口发送。 在该实例中, 中心网元在以下情况下发送第一控制面消息到分布网元: ( 1 )中心网元需要更新分布网元上的 MBSFN小区的系统消息时; ( 2 )分布 网元通过控制面消息指示中心网元, 其需要中心网元更新其 MBSFN小区的 系统消息时。 实例 2: MCCH信道消息同步 在本实例中, 在一组网元中, 中心网元需要更新一个或多个分布网元上 的 MBSFN小区的 MCCH消息时, 通过中心网元和每个分布网元间的接口, 中心网元和每个分布网元进行控制面信息的更新过程, 图 7是根据本发明实 施例的方法的处理实例 2的信令流程图, 如图 7所示, 该流程具体包括如下 的步骤 701至步骤 702: 步骤 701 , 中心网元向一个或者多个分布网元发送第一控制面消息。 该 消息携带的内容包括下列信息的部分或者全部: MCCH 消息更新信息、 MCCH消息更新时间信息、 MCCH信道调度信息、目标小区信息、目标 MCCH 信道信息, 如果目标小区属于同一个 MBSFN同步区域, 则发送到这些目标 小区的消息具有相同的 MCCH消息更新时间信息、 MCCH消息更新信息; 步骤 702, 每个分布网元正确接收到第一控制面消息, 通过与中心网元 之间的接口, 分别回应消息第二控制面消息, 该消息用于分布网元向中心网 元响应其已经正确地接收到第一控制面消息; 分布网元根据接收到第一控制 面消息携带的内容, 根据 MCCH更新时间信息和 MCCH信道调度信息, 在 目标小区更新 MCCH消息。 在上述的第一控制面消息中, 可以携带有如下内容中的至少之一:
1、 MCCH消息更新时间信息: 也就是该消息携带的 MCCH更新信息 在目标小区无线接口开始更新的时刻, 该时间可以是以下几种方式的一种: 无线接口的系统帧号 SFN; —个绝对时间值; MCCH映射的 FACH信道的无 线接口连接帧号 CFN; 指示为从接收到消息后, 第几个修改周期开始更新; 或者其它的中心网元和分布网元十办调一致的时间;
2、 目标小区信息: 该信息指定了该消息携带的 MCCH消息更新信息在 哪个或者哪些目标小区进行更新。 该信息可以表现为如下的几种方式: (a ) 一个或多个目标小区的标识; ( b ) MBSFN 同步区域标识, 在这种情况下, 该消息携带的 MCCH消息更新信息在 MBSFN同步区域内所有小区内更新; ( c ) 小区的频点信息, 在这种情况下, 该消息携带的 MCCH系统消息更新 信息在该频点指定的所有小区内更新; ( d ) MCCH MBSFN同步区域标识, 在这种 'It况下, 该消息携带的 MCCH消息更新信息在该 MCCH MBSFN同 步区域内的所有 'j、区进行更新; 3、 MCCH消息的更新信息: 经过 ASN.1编码后的 MCCH消息。
4、 MCCH信道调度信息: 包括 MCCH重复周期信息、 和 /或 MCCH修 改周期信息;
5、 目标 MCCH信道信息: 该信息指定需要更新 MCCH信道标识。 在本实例中, 中心网元需要更新一个或多个分布网元上的 MBSFN小区 的 MCCH消息时, 是指如下的情况的一种: ( 1 ) 中心网元按照 MCCH修改 周期, 周期性的发送第一控制面消息到各个分布网元; (2 ) 中心网元按照 MCCH重复周期, 周期性的发送第一控制面消息到各个分布网元; (3 ) 中心 网元在 MCCH消息、 或者 MCCH调度信息发生变化时, 发送第一控制面消 息到各个分布网元; (4 )分布网元指示中心网元, 需要进行 MCCH消息更新 时。 在本实例的步骤 702中, 分布网元更新目标小区的 MCCH消息, 是指 如下情况的一种: (a ) 分布网元为 RNC, 则分布网元对接收到的 MCCH消 息进行无线链路控制 (RLC )、 媒体接入控制 (MAC )、 FP 协议层处理后, 经过 Iub接口发送到目标小区所在的 Node B; ( b )分布网元为 ENB或者 Node B +或者其它类似的网元, 则分布网元对接收到的 MCCH 消息进行 RLC、 MAC和无线接口物理协议层处理后 , 无线接口发送。 实例 3: MICH信道消息同步 在本实例中, 在一组网元中, 中心网元需要更新一个或多个分布网元上 的 MBSFN小区的 MICH信道消息时, 通过中心网元和每个分布网元间的接 口, 中心网元和每个分布网元进行控制面信息的更新过程, 图 8是才艮据本发 明实施例的方法的处理实例 3的信令流程图, 如图 8所示, 该流程具体包括 口下的步骤 801至步骤 802: 步骤 801 , 中心网元向一个或者多个分布网元发送第一控制面消息。 该 消息携带的内容包括下列信息的部分或者全部: MICH消息更新信息、 MICH 消息更新时间信息、 MICH信道调度信息、 目标小区信息、 目标 MICH信道 信息, 如果目标小区属于同一个 MBSFN同步区域, 则发送到这些目标小区 的消息具有相同的 MICH消息更新时间信息、 MICH消息更新信息、 MICH 信道调度信息; 步骤 802, 每个分布网元正确接收到第一控制面消息, 通过与中心网元 之间的接口, 分别回应消息第二控制面消息, 该消息用于分布网元向中心网 元响应其已经正确地接收到第一控制面消息; 分布网元根据接收到第一控制 面消息携带的内容, 根据 MICH更新时间信息和 MICH信道调度信息, 在目 标小区更新 MICH信道消息。 在上述的第一控制面消息中, 携带的如下的内容:
1、 MICH消息更新时间信息: 也就是该消息携带的 MICH更新信息在 目标小区无线接口开始更新的时刻,该时间可以是以下几种方式的一种: ( 1 ) 无线接口的系统帧号 SFN; ( 2 ) 一个绝对时间值; (3 )指示为从接收到消息 后, 第几个爹改周期开始更新; ( 4 ) 或者其它的中心网元和分布网元协调一 致的时间;
2、 目标小区信息: 该信息指定了该消息携带的 MICH消息更新信息在 哪个或者哪些目标小区进行更新。 该信息可以表现为如下的几种方式: ( a ) 一个或多个目标小区的标识; ( b ) MBSFN 同步区域标识, 在这种情况下, 该消息携带的 MICH消息更新信息在 MBSFN同步区域内所有小区内更新; ( c ) 小区的频点信息, 在这种情况下, 该消息携带的 MICH 更新信息在该 频点指定的所有小区内更新;
3、 MICH消息的更新信息;
4、 MICH信道调度信息: 包括 MICH信道修改周期信息。 中心网元需要更新一个或多个分布网元上的 MBSFN小区的 MICH消息 时, 是指如下的情况的一种: 中心网元按照 MICH修改周期, 周期性的发送 第一控制面消息到各个分布网元; 中心网元在 MICH消息需要变化时; MICH 信道调度信息发生变化时; 分布网元指示中心网元, 需要进行 MICH消息更 新时。 在本实例的步骤 802 中, 分布网元更新目标小区的 MICH消息, 是指 如下情况的一种: 分布网元为 RNC, 则分布网元对接收到的 MICH信道更新 信息、 MICH信道调度信息、 MICH更新时间信息, 经过 Iub接口控制面消 息发送到目标小区所在的 Node B; 分布网元为 ENB或者 Node B +或者其它 类似的网元, 则分布网元在更新时间指定的时刻, 根据调度周期, 开始更新 MICH信道消息。 实例 4: 在本实例中, 描述了更新失败的情况下的处理过程。 图 9是根据本发明 实施例的方法的处理实例 4的信令流程图, 如图 9所示, 该流程具体包括如 下的步骤 901至步骤 902: 步骤 901、 在中心网元需要更新分布网元上的 MBSFN小区的公共控制 消息时, 通过二者时间的接口, 中心网元向一个或者多个分布网元发送控制 面消息第一控制面消息。 该消息携带的内容包括: 公共控制消息更新信息, 更新时间信息, 更新目标小区, 如果目标小区属于同一个 MBSFN同步区域, 则发送到每个分布网元的消息具有相同的更新时间信息、 公共控制消息更新 信息。 步骤 902、 分布网元接收到第一控制面消息, 处理失败, 则通过与中心 网元之间的接口, 回应消息第三控制面消息, 指示中心网元不能处理公共控 制消息更新请求。 消息中携带失败原因信息。 下面将针对用户面描述本发明。 在一组网元中, 中心网元需要向一个或多个分布网元上的 MBSFN小区 同步发送公共控制消息时, 通过中心网元和每个分布网元间的用户面承载, 中心网元将经过无线网络用户面协议处理后的公共控制消息发送到各个分布 网元, 具体的: 中心网元和一个或多个分布网元间建立用户面传输 载,用于 载需要 同步发送的公共控制消息数据。 中心网元构建公共控制消息内容, 对其进行 无线网络协议层用户面处理, 并对消息数据标记时间 信息, 标识其在无线 接口发送的时间。 中心网元通过分布网元间的用户面传输承载, 发送公共控 制消息数据、 以及其发送时间 信息到一个或多个分布网元。 接收到公共控制消息数据及其时间 的分布网元,对该消息进行后续处 理后, 在时间戳指定的时刻, 在需要发送该公共控制消息的小区无线接口发 送公共控制消息数据。 在上述的方法中, 的无线网络协议用户面处理是指如下方式的一种: 1 ) 中心网元对公共控制消息, 进行无线链路控制层 (RLC ), 并对输出的 RLC PDU标记时间 , 然后以帧协议(FP )帧形式, 通过中心网元和分布网元间 的传输 载发送到一个或多个分布网元。分布网元读取 FP帧中的 RLC PDU , 并进行 MAC协议层处理后, 进行后续处理; 2 ) 中心网元对公共控制消息, 进行无线链路控制层 RLC、 媒体接入控制层 MAC处理, 并对输出的 MAC PDU标记时间 , 然后以帧协议 FP帧形式, 通过中心网元和分布网元间的 传输 载发送到一个或多个分布网元。 分布网元读取 FP帧中的 MAC PDU , 进行后续处理。 上述的时间戳信息,指定相关的公共控制消息数据在无线接口发送的时 间, 其形式为下列方式中的任一种: ( 1 ) 无线接口的系统帧号 SFN、 ( 2 ) 无 线接口的连接帧号 CFN、 ( 3 ) 绝对时间值。 该中心网元需要一个或多个分布网元上的 MBSFN 小区同步发送公共 控制消息时, 是指如下的情况的一种: (a ) 中心网元周期性的发送通过上述 方法发送公共控制消息到各个分布网元; ( b ) 中心网元在公共控制消息、 或 者公共控制消息调度信息发生变化时, 发送公共控制消息数据到各个分布网 元。 分布网元对 MCCH消息数据进行后续处理, 还包括如下情况的一种:
( a ) 分布网元为 RNC , 则分布网元对经过 MAC协议处理后的公共控制消 息数据, 经过 Iub接口以 FP帧形式发送到 Node B ; ( b )分布网元为 ENB或 者 Node B +或者其它类似的网元,则分布网元对经过公共控制消息数据进行 无线接口物理协议层处理后, 在无线接口发送。 综上所述,本发明通过中心网元节点协调多个分布网元节点实现同步发 送相同的公共控制消息的方式解决了相关技术中存在的问题, 并且尤其适用 于一组 RNC以 MBSFN方式组网实现 MBMS业务同步发送、 一组 ENB以 MBSFN 专用载频组网实现 MBMS 业务同步发送、 以及一组 Node B +以 MBSFN专用载频组网实现 MBMS业务同步发送的情况下, 并且, 本领 i或的 技术人员应当理解, 除了上述三种架构之外本发明还有更多的应用场景, 这 里不再——列举。 借助于本发明的技术方案,可以在不同网元间小区间实现公共控制消息 的同步更新和同步发送, 并且实现了 MBSFN方式的发送, 提高了 UE接收 系统消息的增益, 并且具有 4艮好的适用性。 以上所述仅为本发明的优选实施例而已, 并不用于限制本发明, 对于本 领域的技术人员来说, 本发明可以有各种更改和变^^ 凡在本发明的 4青申和 原则之内, 所作的任何修改、 等同替换、 改进等, 均应包含在本发明的保护 范围之内。

Claims

权 利 要 求 书
1. 一种网元间公共控制消息的同步方法, 应用于以多媒体广播组播业务单 频网方式进行多媒体广播组播业务的组网, 所述组网包括一个中心网元 和至少一个分布网元, 其特征在于, 所述方法包括: 所述中心网元指示所述分布网元对所述分布网元各自特定小区的 公共控制消息进行同步更新。
2. 根据权利要求 1所述的方法, 其特征在于, 所述中心网元发送第一控制 面消息来指示所述分布网元对所述分布网元各自的公共控制消息进行更 新, 所述第一控制面消息中包含更新条件; 所述分布网元才艮据所述第一 控制面消息更新公共控制消息。
3. 根据权利要求 2所述的方法, 其特征在于, 在所述分布网元正确接收到 来自所述中心网元的指示之后, 在进行更新之前、 或者成功更新之后, 进一步包括:
所述分布网元向所述中心网元返回第二控制面消息,指示所述分布 网元成功接收指示或成功更新。
4. 根据权利要求 2所述的方法, 其特征在于, 在所述分布网元接收到来自 所述中心网元的指示之后, 如果该分布网元不能正确进行更新, 则进一 步包括:
所述分布网元向所述中心网元返回指示更新失败的第三控制面消 息。
5. 根据权利要求 2所述的方法, 其特征在于, 所述更新条件包括以下至少 之一: 更新时间、 进行消息更新的特定目标小区信息, 其中, 所述特定 目标小区为全部小区或所述更新条件中目标小区信息所指定的小区。
6. 才艮据权利要求 1所述的方法, 其特征在于, 所述公共控制消息包括以下 至少之一: 系统消息、 多媒体广播组播业务点到多点控制信道消息、 媒 体广播组播业务通知指示信道消息。
7. 根据权利要求 6所述的方法, 其特征在于, 在需要更新的公共控制消息 为系统消息的情况下, 所述更新条件进一步包括以下至少之一: 所述系 统消息的信息块列表、 对应于所述信息块列表中的信息块的操作指示。
8. 根据权利要求 7所述的方法, 其特征在于, 所述操作指示包括以下之一: 删除信息块; 更新信息块及更新后的数据信息, 其中还包括所述信息块 的调度信息。
9. 根据权利要求 6所述的方法, 其特征在于, 在需要更新的公共控制消息 为多媒体广播组播业务点到多点控制信道消息的情况下, 所述更新条件 进一步包括以下至少之一: 所述多媒体广播组播业务点到多点控制信道 消息的更新信息、 多媒体广播组播业务点到多点控制信道的调度信息、 所述多媒体广播组播业务点到多点控制信道的标识。
10. 根据权利要求 6所述的方法, 其特征在于, 在需要更新的公共控制消息 为多媒体广播组播业务通知指示信道消息的情况下, 所述更新条件进一 步包括以下至少之一: 所述多媒体广播组播业务通知指示信道消息的更 新信息、 多媒体广播组播业务通知指示信道的调度信息。
11. 根据权利要求 5所述的方法, 其特征在于, 所述更新时间具体包括以下 之一: 无线接口系统帧号、 无线接口连接帧号, 时刻、 所述组网元内的 协调时间。
12. 根据权利要求 5所述的方法, 其特征在于, 所述目标小区信息具体为以 下至少之一: 小区标识、 多媒体广播组播业务单频网同步区域标识、 小 区频点信息。
13. 根据权利要求 1所述的方法, 其特征在于, 所述中心网元通过发送用户 面消息发送更新的无线接口控制面公共控制消息到所述分布网元, 所述 分布网元才艮据所述用户面消息更新其各自的特定小区的公共控制消息, 所述用户面消息包含经过无线网路协议层处理后的公共控制消息数据和 指示其包含的公共控制消息数据在无线接口发送的时间 信息。
14. 根据权利要求 1至 13中任一项所述的方法, 其特征在于,
在所述组网属于通用陆地无线接入网的情况下,所述中心网元为主 控无线网络控制器, 所述分布网元为从属无线网络控制器; 或 在所述组网属于高速分组接入加系统的情况下,所述中心网元为主 控 Node B + , 所述分布网元为从属 Node B +; 或
在所述组网属于长期演进系统的情况下, 所述中心网元为多小区 / 多播协调实体, 所述分布网元为演进的通用陆地无线接入网络 Node B。
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KR101195538B1 (ko) 2012-10-29
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US20110058513A1 (en) 2011-03-10
JP5184698B2 (ja) 2013-04-17
US8483205B2 (en) 2013-07-09
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EP2278831A4 (en) 2014-03-05
CN101572859A (zh) 2009-11-04
KR20110014615A (ko) 2011-02-11

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