WO2011143992A1 - 一种实现mbms业务调度的方法及系统 - Google Patents

一种实现mbms业务调度的方法及系统 Download PDF

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Publication number
WO2011143992A1
WO2011143992A1 PCT/CN2011/073143 CN2011073143W WO2011143992A1 WO 2011143992 A1 WO2011143992 A1 WO 2011143992A1 CN 2011073143 W CN2011073143 W CN 2011073143W WO 2011143992 A1 WO2011143992 A1 WO 2011143992A1
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Prior art keywords
mbms service
scheduling
enb
cell
mbms
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PCT/CN2011/073143
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English (en)
French (fr)
Inventor
王斌
苟伟
马子江
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中兴通讯股份有限公司
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Priority claimed from CN201010189486.XA external-priority patent/CN102256210B/zh
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
Publication of WO2011143992A1 publication Critical patent/WO2011143992A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/20—Services signaling; Auxiliary data signalling, i.e. transmitting data via a non-traffic channel
    • H04W4/23—Services signaling; Auxiliary data signalling, i.e. transmitting data via a non-traffic channel for mobile advertising
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/30—Resource management for broadcast services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/20—Services signaling; Auxiliary data signalling, i.e. transmitting data via a non-traffic channel

Definitions

  • the present invention relates to a Multimedia Broadcast Multicast Service (MBMS) technology, and more particularly to a method and system for implementing MBMS service scheduling.
  • MBMS Multimedia Broadcast Multicast Service
  • Mobile data multimedia services and various high-bandwidth multimedia services require multiple users to receive the same data at the same time. Compared with general data services, they have the characteristics of large data volume, long duration, and delay sensitivity.
  • 3GPP, 3rd Generation Partnership Project proposes Multimedia Broadcast Multicast Service (MBMS), which is a data source to multiple
  • MBMS Multimedia Broadcast Multicast Service
  • the MBMS service defined by 3GPP can not only realize plain text low-rate message class multicast and broadcast, but also realize high-speed multimedia service broadcast and multicast, and provide a variety of rich video, audio and multimedia services, which undoubtedly conforms to future mobile
  • 3G, 3rd Generation third-generation digital communication
  • the MBMS service carries the common transmission of control signaling and user data in the system to implement. among them, The control signaling will inform the receiving end (or terminal, user equipment (UE)) corresponding control parameters, and direct the UE to the corresponding location to receive the MBMS service (ie, corresponding user data) of interest.
  • the control signaling is transmitted through a Multicast Control Channel (MCCH).
  • the MBMS service is transmitted through a Multicast Traffic Channel (MTCH).
  • MCCH Multicast Control Channel
  • MTCH Multicast Traffic Channel
  • the MBMS control signaling and the MBMS service are area-divided by a MBSFN (MBSFN Area) (MBSFN Area), where the MBSFN Area is composed of a series of cells.
  • one MBSFN area includes one or more cells controlled by an evolved base station (eNB).
  • eNB evolved base station
  • 1 is a schematic diagram of a conventional MBSFN area.
  • an MBSFN area (such as a circle) includes 19 cells, wherein a cell indicated by a left oblique shadow is a cell 1 , 2 , . . . controlled by eNB1. .6;
  • the cell indicated by the right oblique shadow is the cell 7,8, ..., 13 controlled by eNB2;
  • the cell indicated by the small square hatching is the cell 14, 15 , ... 19 controlled by eNB3.
  • the control signaling and the user data are transmitted in units of cells or eNBs, and the MBSFN technology is used for synchronous transmission (the purpose is to enable the UE to The corresponding combining gain can be obtained when receiving. Therefore, the MBSFN technology requires each cell in the MBSFN area to send the same data content on the same time-frequency resource, so that the resources of each cell need to be uniformly scheduled and planned.
  • a multi-cell/multicast coordination entity (MCE) network element is used for unified scheduling and planning of radio resources. For specific implementation, reference may be made to the international standard 3GPP 36.300 v910.
  • one MCE controls the transmission of the MBMS service in the entire MBSFN area, that is, the MCE determines the MBMS service transmitted on the MBSFN subframe of the MBSFN area, and the eNB controls the transmission of the MBMS service of each cell under its control.
  • the MCE configures a multicast resource of MBMS service (MTCH) and control signaling (MCCH) carried by an MBSFN area, that is, an MBSFN subframe (frame) and an MBSFN frame (frame).
  • MBSFN multicast resource of MBMS service
  • MCCH control signaling
  • Multiple eNBs under the coverage of the MCE (such as eNB1, eNB2, and eNB3 in FIG. 1) configure these multicast resources into all cells through system broadcast messages (such as cells 1, 2, ... in FIG. 1). 19), at the same time, the MBMS service data of the Broadcast Multicast Service Centre (BM-SC) is also sent to the multiple eNBs of the MBSFN area through the MBMS gateway (MBMS-GW) (such as eNB1 in FIG. 1 , eNB2, eNB3).
  • MBMS-GW MBMS gateway
  • FIG. 2 is a schematic diagram of the MBMS service bearer architecture in the prior art, where Ml is the user plane interface ( user Plane interface ) , M2 is the E-UTRAN internal control plane interface, and M3 is the control plane interface between E-UTRAN and EPC.
  • a particular cell may be covered by multiple MBSFN Areas at the same time, which is commonly referred to as MBSFN Area overlap coverage.
  • MBSFN Area overlap coverage is commonly referred to as MBSFN Area overlap coverage.
  • the cell supports overlapping coverage of 1 to 8 MBSFN Areas.
  • the cell is the smallest unit covered by the MBSFN Area, and one eNB may correspond to multiple cells.
  • the cell may have multiple MCCHs at the same time (because each MBSFN Area corresponds to one MCCH).
  • MP MCCH Modification Period
  • the MCCH MP the content carried by the MCCH is not allowed to change; in the MCCH MP, the MCCH information is also repeated.
  • the transmission interval which is called the MCCH repetition period (RP, Repeat Period), is repeated in the repetition period mainly to improve the reliability of the UE receiving the MCCH information.
  • the relationship between the MCCH MP and the MCCH RP is as shown in FIG.
  • Figure 3 is a schematic diagram showing the relationship between MCCH MP and MCCH RP in the prior art.
  • MCCH MP ( n )
  • the MCCH RP indicates Repeated transmission of MCCH content in MCCH MP.
  • SIB 13 System Information Block
  • BCCH Broadcast Control Channel
  • Corresponding parameters such as MP and RP of MCCH.
  • the UE can obtain the control information of the MBSFN Area corresponding to the MBSFN Area by reading the MCCH message, for example, the configuration information of the multicast subframe resource of the MBSFN Area, and all the network sides in the MBSFN Area have started to send (continuous) the MBMS service and the ingoing
  • the control parameters of the MBMS service are as parameters MBMS-SessionInfo-r9, sessionId-r9, serviceld-r9, and so on.
  • the Multicast Channel is a transport channel that performs point-to-multipoint transmission.
  • the corresponding physical resource is the multicast resource allocated by the system for transmitting MBMS services.
  • a carrier frequency can carry multiple MCHs.
  • the physical channel carrying a specific MCH is determined by a set of subframes. These subframes are not necessarily time-continuously allocated. This pattern is called subframe allocation of a multicast channel.
  • MSAP MH subframe allocation pattern
  • an MSAP describes the physical resources of an MCH channel.
  • the multicast resources of each MBSFN area can be divided according to a certain pattern in units of subframes, and the resources indicated by each pattern constitute an MCH.
  • the Multicast Traffic Channel is a logical channel.
  • One MTCH carries data of one or more services (such as a TV program called a service).
  • One service is carried only in one MTCH, and the MTCH is mapped to the MCH.
  • one or more MTCHs can be mapped to one or more MCHs, that is, multiple MBMS services can be mapped to one MCH.
  • the characteristics of the MBMS transmission using the multi-cell transmission mode include synchronous transmission in the MBSFN area; support for combining the multi-cell MBMS transmission data; MTCH and MCCH mapping to the MCH transmission channel in the p-T-m mode, and the like.
  • the UE can learn the specific multicast resource corresponding to a specific MCH.
  • the MCH contains one or more MBMS service data (such as one or more MTCHs)
  • the MBMS dynamic scheduling information needs to specify the specific physical resources corresponding to a certain MBMS service.
  • the UE can learn the exact resource of the MBMS service through the indication of the MBMS dynamic scheduling information, thereby realizing accurate reception of the MBMS service.
  • the UE remains silent and does not receive its subframe information, thereby saving UE energy consumption.
  • the resources scheduled or governed by the MBMS dynamic scheduling information are defined as a dynamic schedule period, such as 320 ms, 640 ms, and the like.
  • 4 is a schematic diagram showing the logical relationship between the setting of the scheduling block in the dynamic scheduling period and the MBMS service in the prior art, as shown in FIG. 4, wherein the bold horizontal line shading indicates the scheduling block, and the other shadows indicate different MBMS services.
  • the blank portion indicates no data or padding.
  • the uplink feedback refers to a UE that is being/prepared to receive the MBMS service by the network side or by the UE passing the uplink feedback channel.
  • the status attribute is sent to the network side, for example, the MBMS service identifier that the UE is receiving/interested to receive.
  • the information reported by the UE can be used by the network side to obtain more detailed information of the subordinate UE, such as a cell in the MBSFN area.
  • a typical application example is as follows: Each eNB in the MBSFN area requests its subordinate UE to feed back the MBMS service name that it is preparing/receiving (the uplink feedback procedure is triggered by the eNB), and the UE that is preparing/receiving the MBMS service will be in the uplink feedback channel.
  • the MBMS service identifier such as the MBMS service ID, is being prepared/received, and is fed back to the eNB to which it belongs.
  • Each eNB may receive the MBMS service according to the obtained information, such as the number of users receiving/interested to receive a certain MBMS service, and combining the determination conditions, such as in the eNB in the MBSFN area.
  • the number of users or the number of users receiving the MBMS service is lower than a threshold, etc., to determine whether the MBMS service data is turned on or off on the eNB.
  • the MBMS service coverage is transmitted based on the corresponding MBSFN area, that is, the MBSFN area corresponding to the MBMS service includes several cells, and the MBMS service It will be transmitted in these cells.
  • the MBSFN area corresponding to the MBMS service is currently operated. Once the OAM (Operation, Administration, and Maintenance) is configured, it will not change or rarely change.
  • the main object of the present invention is to provide a method and system for implementing MBMS service scheduling, which can improve the utilization of radio resources and avoid waste of transmission power.
  • a method for implementing MBMS service scheduling which pre-sets scheduling conditions, further includes: scheduling the network element to perform scheduling of the MBMS service of the multimedia broadcast multicast service for the cell in the multicast single frequency network (MBSFN) area according to the scheduling condition.
  • MBSFN multicast single frequency network
  • the scheduling condition is: receiving uplink feedback of the user equipment UE, and/or the number of radio resources that the non-MBMS service needs to occupy, and/or the request from the operation management and maintenance OAM.
  • the scheduling condition is that the uplink feedback of the UE is received; the scheduling of the MBMS service by using the cell in the MBSFN area includes:
  • the scheduling network element determines, according to the information obtained from the uplink feedback, the MBMS service data of each cell in the MBSFN area to be turned on or off in the cell according to the preset determination condition.
  • the information obtained from the uplink feedback is: the number of users of the MBMS service being received/prepared to be received in a cell in the MBSFN area.
  • the discriminating condition is:
  • the scheduling condition is the number of radio resources that need to be occupied by the non-MBMS service, and the scheduling of the MBMS service by using the cell in the MBSFN area includes:
  • the scheduling network element turns off/on the sending of the MBMS service according to the size of the radio resource that is required to be occupied by the non-MBMS service.
  • the scheduling condition is a request from the OAM, and the scheduling of the MBMS service by using the cell in the MBSFN area as the object includes:
  • the scheduling network element determines whether the MBMS service data in each cell in the MBSFN area is turned on or off according to the request of the OAM.
  • the MBMS service scheduling for the cell in the MBSFN area is: in the MBSFN area, the cell and/or the evolved base station eNB are granular, and one or more MBMS services are turned on/off.
  • the cell is granularity: when the one or more MBMS services are sent/disabled, one or more cells under the control of one eNB are respectively turned on/off.
  • the eNB is granularity: all cells under the control of one eNB are granular, and when the one or more MBMS services are transmitted/disabled, all cells under the control of the eNB are simultaneously turned on/off.
  • the scheduling network element is an eNB.
  • the scheduling network element is a multi-cell/multicast coordination entity MCE, or a broadcast multicast service center BM-SC, or an MBMS gateway MBMS-GW;
  • the scheduling network element performs the multimedia broadcast multicast service for the cell in the MBSFN area of the multicast single frequency network according to the scheduling condition.
  • the scheduling of the MBMS service includes:
  • the scheduling network element determines whether to enable/disable the MBMS service according to the information from the eNB and the effect of turning on/off the MBMS service transmission of a certain cell to the MBSFN combining gain of the adjacent cell; and turning on/off the MBMS service
  • the incoming decision is sent to the corresponding eNB; the eNB that receives the decision turns the corresponding MBMS service on/off.
  • the information from the eNB is: the number of UEs that are receiving/interesting in the received MBMS service, or the eNB making a decision of the cell under its control to enable/turn off the corresponding MBMS service.
  • the indication information that the scheduling network element sends to the eNB to enable/disable the MBMS service decision includes one or any combination of the following:
  • An on/off indication of one or more cells under a certain eNB the indication information including a cell identifier
  • All cells under the entire scheduling network element have simultaneous on/off indications.
  • a system for implementing MBMS service scheduling includes at least a scheduling network element, wherein a scheduling condition is set, and the MBMS service scheduling is performed on a cell in the MBSFN area according to a scheduling condition.
  • the scheduling network element is an eNB
  • the scheduling network element is an MCE, or a BM-SC, or an MBMS-GW.
  • the system further includes an eNB;
  • the scheduling network element is configured to perform a decision to enable or disable the MBMS service according to the scheduling condition, and notify the eNB of the decision;
  • the eNB is configured to perform specific control on the MBMS service.
  • the scheduling condition is set in the scheduling network element, and the scheduling of the MBMS service is performed on the cell in the MBSFN area according to the scheduling condition.
  • the MBMS service scheduling for the cell in the MBSFN area is implemented by the method of the present invention, and the MBMS service is closed when the number of users receiving the MBMS service is not lower than the threshold.
  • the transmission in the cell improves the utilization of radio resources and avoids waste of transmission power.
  • Figure 1 is a schematic diagram of an existing MBSFN area
  • FIG. 2 is a schematic diagram of a bearer architecture of an MBMS service in the prior art
  • FIG. 3 is a schematic diagram showing the relationship between MCCH MP and MCCH RP in the prior art
  • FIG. 4 is a schematic diagram showing a logical relationship between a setting of a scheduling block in a dynamic scheduling period and an MBMS service in the prior art
  • FIG. 5 is a flowchart of a method for implementing MBMS scheduling according to the present invention.
  • FIG. 6 is a flowchart of a first embodiment of a method for implementing MBMS scheduling according to the present invention
  • FIG. 7 is a flowchart of a second embodiment of a method for implementing MBMS scheduling according to the present invention
  • FIG. 8 is a block diagram of an MBSFN area according to an embodiment of the present invention.
  • FIG. 9 is a schematic diagram of radio resource bearer after MBMS service B is turned off according to an embodiment of the present invention
  • FIG. 10 is a schematic diagram of radio resource bearer after MBMS service C is turned off according to an embodiment of the present invention.
  • FIG. 5 is a flowchart of a method for implementing MBMS scheduling according to the present invention. As shown in FIG. 5, the method includes the following steps: Step 500: Set a scheduling condition in advance.
  • the scheduling condition may be that the UE receives uplink feedback, and/or non-MBMS industry. (Non-MBMS service) The number of radio resources that need to be occupied, and/or requests received from OAM.
  • the uplink feedback of the UE is received, and the network side (eNB or other network element) triggers or the UE sends the status information of the UE that is receiving/preparing the received MBMS service to the network side through the uplink feedback channel.
  • the network side eNB or other network element
  • the network side eNB or other network element
  • the MBMS service identifier that the UE is receiving/interested to receive.
  • the number of radio resources that the non-MBMS service needs to occupy is the size of the radio resources that the non-MBMS service, also known as the unicast service.
  • the request from OAM refers to the operational configuration indication from OAM.
  • Step 501 The scheduling network element performs scheduling of the MBMS service for the cell in the MBSFN area according to the scheduling condition.
  • the uplink feedback received by the UE is used, and the scheduling network element, according to the obtained information, for example, the number of users of a certain MBMS service being received/prepared in a cell in the MBSFN area, combined with the determination condition, such as in the MBSFN area In a certain cell, there may be no user receiving the MBMS service or the number of users receiving the MBMS service is lower than a threshold, etc., to determine whether the MBMS service data of each cell in the MBSFN area is turned on or off in the cell;
  • the scheduling network element For the scheduling condition, the number of radio resources to be occupied by the non-MBMS service is used, and the scheduling network element turns off/on the transmission of a certain MBMS service according to the size of the radio resource that the non-MBMS service needs to occupy. For example, when the scheduling network element discovers that the radio resources occupied by the unicast service are insufficient, the radio resource may be released by closing the MBMS service of a certain cell or some cells in the MBSFN area. Further, the released radio resource may be used. Carrying unicast services to further improve resource utilization;
  • the scheduling network element determines whether the MBMS service data in each cell in the MBSFN area is turned on or off according to the request of the OAM.
  • the scheduling network element may be an eNB, or one or more of other network elements on the network side, such as an MCE, a BM-SC, and an MBMS-GW.
  • the scheduling network element is an eNB, according to the scheduling by the eNB Conditionally performing scheduling of turning on or off the MBMS service; when the scheduling network element is another network element, the other network element performs a decision to turn on or off the MBMS service according to the scheduling condition, and notifies the eNB of the decision, The eNB performs specific control.
  • the MBMS service scheduling for the cells in the MBSFN area is such that, in the MBSFN area, the cell/and/or eNB is granular, and one/some MBMS services are turned on/off.
  • the eNB is granular, which means that all cells under the control of one eNB are granular, that is, when one/some MBMS service transmission is turned on/off, all cells under the control of the eNB are simultaneously turned on/
  • the cell is granular, it means that one/multiple cells under the control of one eNB can be turned on/off separately when turning on/off one/some MBMS service transmission.
  • the eNB turns on/off one or a certain MBMS service as:
  • Several MBMS services have been sent from the BM-SC to the eNB, and the eNB performs ON/OFF of the MBMS service, that is, although The eNB has obtained MBMS service data, but the eNB performs whether to transmit these MBMS services on the Uu (eNB to UE air interface) interface.
  • the BM-SC transmits several MBMS services in one MBSFN area
  • the eNB may not send these MBMS services on the Uu interface, and the UE will not receive these MBMS services.
  • the MBMS services have arrived from the BM-SC to the eNB via the MBMS-GW, but are opened or closed by the eNB on the air interface. Send off.
  • the eNB controls, according to its own or from other network elements (e.g., MCE, BM-SC, MBMS-GW), to control the transmission of some or all of the MBMS services of some or all of the cells under it.
  • network elements e.g., MCE, BM-SC, MBMS-GW
  • FIG. 6 is a flowchart of a first embodiment of a method for implementing MBMS scheduling according to the present invention.
  • the scheduling network element is an eNB, and there are several eNBs in the MBSFN area, and the eNB determines whether it is under its control. Or multiple cells or all cells, turning on/off the transmission of one or several MBMS services.
  • Step 600 The UE uplink feedback is receiving/interesting the received MBMS service.
  • Step 601 Each eNB in the MBSFN area receives uplink feedback information of its subordinate UE.
  • the scheduling condition used by the eNB may be the uplink feedback of the UE in the cell under its control, or the number of radio resources that need to be occupied according to the Non-MBMS, or one or more of the requests from the OAM.
  • the eNB receives the uplink feedback of the UE in the MBSFN area as the scheduling condition as an example. After the eNB obtains the uplink feedback of the UEs in the MBSFN area, according to the comparison between the number of UEs that the MBMS service is receiving or interested in receiving, and the threshold value, the current eNB controls or disables the current eNB.
  • Step 602 The eNB determines to enable/disable the corresponding MBMS service according to the received uplink feedback information.
  • the method for the eNB to enable or disable one or several MBMS services in the cell under the control of the eNB includes: turning on or off one or more cells under its control by using the cell as granularity; Granularity, simultaneously turning on or off all cells under its control.
  • the present invention emphasizes that the scheduling of the MBMS service is implemented for the cell in the MBSFN area, and the specific scheduling, that is, how to decide to enable/disable one or some MBMS, is a common technical means by those skilled in the art, and the specific implementation thereof The solution is not intended to limit the scope of the invention.
  • Step 603 The eNB performs on/off of the corresponding MBMS service.
  • FIG. 7 is a flowchart of a second embodiment of a method for implementing MBMS scheduling according to the present invention.
  • several eNBs in an MBSFN area receive other network elements (such as MCE or BM-SC or MBMS-GW, this implementation).
  • the description of the MCE is taken as an example, and one or more or all cells under its control are executed, and the sending of one or several MBMS services is turned on/off.
  • the method includes:
  • Step 700 The UE uplinks the MBMS service that is being/interested to receive the uplink.
  • Step 701 Each eNB to which the MBSFN area belongs receives uplink feedback information of its subordinate UE.
  • the eNBs in the MBSFN area obtain the uplink feedback of the subordinate UEs, Feedback the obtained information to the MCE.
  • the information that is specifically fed back to the MCE may be the number of UEs that are receiving/interested to receive the MBMS service, or the eNB determines the cell to turn on/off the corresponding MBMS service under the control of the eNB; If the cell turns on/off the corresponding MBMS service decision, the eNB may perform uplink feedback according to the UE in the cell under its control, and/or according to the number of radio resources that the Non-MBMS needs to occupy, and/or the request from the OAM. Scheduling.
  • Step 703 The MCE integrates the uplink feedback information of the eNB and the impact on the combining gain, and determines to turn on/off the corresponding MBMS service.
  • the MCE considers whether the MBMS service is enabled/disabled according to the information received by the MCE, considering the effect of turning on/off the MBMS service transmission of the cell to the MBSFN merge gain of the adjacent cell.
  • the specific implementation is a technical means that is common to those skilled in the art, and the specific implementation does not limit the scope of the present invention, and will not be described in detail herein.
  • Step 704 The MCE sends an ON/OFF MBMS service decision to the corresponding eNB.
  • the indication information that the MCE sends to the eNB to enable/disable the MBMS service decision may be one or any combination of the following:
  • an on/off indication of one or more cells under a certain eNB the indication information needs to include a cell identifier
  • An on/off indication of all cells in a certain eNB the indication information needs to include an eNB identifier, and may not include a cell identifier;
  • All cells in the entire MCE are simultaneously turned on/off, that is, the on/off indications of all cells under all eNBs under the control of the MCE.
  • Step 705 The eNB turns on/off the corresponding MBMS service.
  • the eNB receives indication information from other network elements, and the eNB turns on or off the transmission of one/several MBMS services in one or more or all cells under its control.
  • the system of the present invention further provides a system for implementing MBMS service scheduling, which includes at least a scheduling network element, where a scheduling condition is set, which is used to perform small conditions in the MBSFN area according to scheduling conditions.
  • the area performs scheduling of the MBMS service for the object.
  • the scheduling network element is one or more of the eNB, or other network elements on the network side, such as MCE, BM-SC, and MBMS-GW.
  • the scheduling network element is another network element on the network side
  • the system further includes an eNB, where the other network element is configured to perform a decision to enable or disable the MBMS service according to the scheduling condition, and notify the eNB of the decision; Used to perform specific control of the MBMS service.
  • FIG. 8 is a schematic diagram of the composition of the MBSFN area in the embodiment of the present invention.
  • the MBSFN area is composed of 7 cells (the cells shown by the shaded parts in the circle in FIG. 8).
  • the MBSFN area carries three MBMS services: MBMS service A, MBMS service B, and MBMS service C.
  • MBMS service A the cells shown by the shaded parts in the circle in FIG. 8
  • MBMS service C the number of the MBSFN area
  • the MBSFN area carries three MBMS services: MBMS service A, MBMS service B, and MBMS service C.
  • the specific radio resource bearer is shown in FIG. 4, and the bold horizontal line shadow indicates the scheduling block, and other shadows indicate different
  • the MBMS service A, MBMS service B, and MBMS service C in Figure 4 of the MBMS service indicate that there is no data or padding.
  • the UEs that are receiving the MBMS service in each of the eNBs in the MBSFN area report the MBMS service names that they are receiving to the eNBs to which they belong, and the eNBs perform the feedback information obtained by the eNBs.
  • An eNB, such as eNB X, is taken as an example, as shown in Table 1:
  • Each eNB uses the integrated information to schedule the MBMS service to determine whether to turn on/off some/some MBMS services.
  • the specific implementation in the first embodiment is as follows: The eNB X knows that the number of UEs that are receiving the MBMS service B in the cell to which it belongs is 0. Therefore, the eNB X decides to turn off the transmission of the MBMS service B in the cell to which it belongs.
  • FIG. 9 is a schematic diagram of radio resource bearer after MBMS service B is disabled according to an embodiment of the present invention.
  • the multicast subframe configuration and application of eNB X are as shown in FIG. 9, and the radio resource corresponding to MBMS service B is shown.
  • the service data of MBMS service B is no longer sent.
  • the MBMS service B needs to send the MBMS service to the radio resources multiplexed with the MBMS service A and the MBMS service C at the first/last end. B business data; therefore, the filling indicated by the double vertical line in Fig. 9 is represented.
  • the multicast resource corresponding to the MBMS service B service can be transmitted to the unicast service, thereby further improving resource utilization.
  • the UEs that are receiving the MBMS service in each of the eNBs in the MBSFN area report the MBMS service names that they are receiving to the eNBs to which they belong, and the eNBs perform the feedback information obtained by the eNBs.
  • An eNB, such as eNB Y, is taken as an example, as shown in Table 2:
  • the eNB reports the integrated information to the MCE; the information reported to the MCE may be the number of UEs being received by each MBMS service, or the eNB's decision to send or not to each MBMS service.
  • the eNB reports to the MCE whether to send or not for each MBMS service; the details are as follows:
  • the eNB Y learns that the number of UEs that are receiving the MBMS service C in the cell to which it belongs is 0. Therefore, the eNB Y initially decides to turn off the transmission of the MBMS service C in the cell to which it belongs, and The initial decision is sent to the MCE; after receiving the feedback information from each eNB in the MBSFN area, the MCE comprehensively considers the decision of the eNB Y to initially close the MBMS service C, and closes the transmission of the MBMS service C in the eNB Y for the receiving of the MBMS service C. Impact, making the decision to finally close MBMS service C on eNB Y;
  • FIG. 10 is a schematic diagram of a radio resource bearer after the MBMS service C is turned off according to an embodiment of the present invention.
  • the multicast subframe configuration and application of the eNB Y are as shown in FIG. 10, and the MBMS service C is no longer sent by the radio resource corresponding to the MBMS service C.
  • Business data Considering the limitation of the MBSFN technology merge, in order not to affect the transmission of the MBMS service B, the MBMS service C still needs to send the MBMS service C service data in the first radio resource multiplexed with the MBMS service B, as indicated by the cross slash in FIG. The padding is shown. Since MBMS service C is located at the end of the scheduling period, it does not affect its subsequent MBMS service transmission during the scheduling period, so the end padding is no longer considered.
  • the unicast service is transmitted by using the multicast resource corresponding to the MBMS service C service that is turned off (such as the multicast subframe shown in the blank in FIG. 10) to further improve resource utilization.
  • each eNB in the MBSFN area determines whether the MBMS service transmission of the cell to which it belongs is turned on or off. Each eNB will perform the transmission of turning on or off a certain MBMS service.
  • an eNB such as eNB Z turns off the MBMS service B as an example for description.
  • the eNB Z determines and performs the transmission of the MBMS service B in the cell to which it belongs. From the perspective of the radio resource, the multicast subframe configuration and application of the eNB Z are as shown in FIG.
  • the MCE determines whether the MBMS service transmission of the cell to which each eNB belongs is turned on or off in the MBSFN area; each eNB performs to enable or disable the transmission of some/some MBMS services according to the decision of the MCE.
  • the eNB M determines and performs the transmission of the MBMS service B in the cell to which it belongs. From the perspective of the radio resource, the multicast subframe configuration and application of the eNB M are as shown in FIG. 9 . Show.
  • each eNB in the MBSFN area determines whether the MBMS service transmission of the cell to which it belongs is turned on or off.
  • Each eNB will perform the transmission of turning on or off some/some MBMS services.
  • eNB such as eNB N to turn off the MBMS service B
  • the eNB N shuts down the MBMS according to the insufficient radio resources required for its Non-MBMS service.
  • the service B is transmitted in the cell to which it belongs. From the perspective of radio resources, the multicast subframe configuration and application of the eNB N are as shown in FIG. 9.
  • each eNB in the MBSFN area determines whether the MBMS service transmission of the cell to which it belongs is turned on or off.
  • Each eNB will perform the transmission of turning on or off some MBMS services.
  • the eNB Q turns off the MBMS service B in the cell to which it belongs according to the configuration of the OAM to which it belongs. Transmit, from the perspective of radio resources, the multicast subframe configuration and application of eNB Q is as shown in FIG. 9.

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Description

一种实现 MBMS业务调度的方法及系统 技术领域
本发明涉及多媒体广播多播业务 （ MBMS , Multimedia Broadcast Multicast Service )技术， 尤指一种实现 MBMS业务调度的方法及系统。 背景技术
随着互联网的迅猛发展和大屏幕多功能手机的普及， 出现了大量移动 数据多媒体业务和各种高带宽多媒体业务， 例如： 视频会议、 电视广播、 视频点播、 视频广告、 网上教育、 互动游戏等。 这些移动数据多媒体业务 和高带宽多媒体业务， 不仅满足了移动用户不断上升的业务需求， 同时也 为移动运营商带来了新的业务增长点。
移动数据多媒体业务和各种高带宽多媒体业务要求多个用户能够同时 接收相同数据， 与一般的数据业务相比， 具有数据量大、 持续时间长、 时 延敏感等特点。为了有效地利用移动网络资源，第三代合作伙伴计划（ 3GPP, 3rd Generation Partnership Project )提出了多媒体广播多播业务（MBMS, Multimedia Broadcast Multicast Service ) , MBMS业务是一种从一个数据源 向多个目标传送数据的技术， 实现了网络（包括核心网和接入网） 资源的 共享， 提高了网络资源 （尤其是空中接口资源） 的利用率。 3GPP 定义的 MBMS业务不仅能够实现纯文本低速率的消息类组播和广播， 还能够实现 高速多媒体业务的广播和组播， 提供多种丰富的视频、 音频和多媒体业务， 这无疑顺应了未来移动数据发展的趋势， 为第三代数字通信 （3G , 3rd Generation ) 的发展提供了更好的业务前景。
目前，在长期演进版本 9 ( LTE R9 )系统中引入了 MBMS业务。 MBMS 业务在系统中承载需要控制信令和用户数据的共同传输来进行实现。 其中， 控制信令将会告知接收端（或终端、 用户设备（UE, User Equipment ) )相 应的控制参数， 指引 UE到相应的位置去接收其感兴趣的 MBMS业务（即 相应的用户数据） 。 这种控制信令在 LTE R9 系统中是通过多播控制信道 ( MCCH, Multicast Control Channel )来进行传输的， MBMS业务是通过多 播业务信道 ( MTCH, Multicast Traffic Channel )来进行传输的。 MBMS控 制信令和 MBMS业务是以多播单频网络 ( MBSFN, MBMS over a Single Frequency Network )区域（ MBSFN Area )来进行区域划分的，其中 MBSFN Area由一系列小区所组成。
具体来说， 一个 MBSFN区域包括 1个或多个由演进基站（ eNB )控制 下的小区。图 1为现有 MBSFN区域逻辑示意图，如图 1所示，一个 MBSFN 区域（如圓圈内）包括 19个小区， 其中， 釆用左斜阴影表示的小区为 eNBl 控制的小区 1 , 2 , ...,6; 釆用右斜阴影表示的小区为 eNB2 控制的小区 7,8, ...,13; 釆用小方格阴影表示的小区为 eNB3控制的小区 14,15 , ...19。
由于现有技术中， 在 MBSFN Area (圓圈内的 19 个小区构成了一个 MBSFN区域） 中发送控制信令和用户数据是以小区或 eNB为单位， 使用 MBSFN技术进行同步发送（目的是使得 UE在接收时可以获得相应的合并 增益） 的， 因此， MBSFN技术要求 MBSFN area内各个小区在相同的时频 资源上发送相同的数据内容， 这样就需要对各个小区的资源进行统一的调 度和规划。 现有技术中使用的是多小区 /多播协调实体 （ MCE , Multi-cell/multicast Coordination Entity ) 网元来进行无线资源的统一调度和 规划， 具体实现可参考国际标准 3GPP 36.300 v910。 具体来说， 一个 MCE 控制整个 MBSFN区域的 MBMS业务的发送， 即： MCE决定该 MBSFN区 域的 MBSFN子帧上发送的 MBMS业务，而由 eNB来控制其控制下的各个 小区的 MBMS业务的发射。
MCE配置一个 MBSFN区域所承载的 MBMS业务（ MTCH )和控制信 令（ MCCH )的多播资源即 MBSFN子帧（ subframe )和 MBSFN帧（ frame )。 MCE覆盖下的多个 eNB (如图 1中的 eNBl , eNB2, eNB3 )通过系统广播 消息， 将这些多播资源配置到所有的小区中 （如图 1中的小区 1,2,...,19 ) , 同时， 广播组播业务中心 （BM-SC, Broadcast Multicast Service Centre ) MBMS业务数据也通过 MBMS网关（ MBMS-GW )发送到这个 MBSFN区 域的多个 eNB中 （如图 1中的 eNBl , eNB2, eNB3 ) 。 本文中， 将传输路 径 BM-SC->MBMS-GW->eNB, 称为用户面数据传输 (用于传输 MBMS业 务数据） ， 将传输路径 BM-SC->MBMS-GW->MCE->eNB , 称为控制面信 令传输（用于配置多播资源等控制参数） ， 具体如图 2所示， 图 2为现有 技术中 MBMS业务承载架构的逻辑示意图， 其中 Ml为用户面接口 （user plane interface ) , M2为 E-UTRAN控制面接口 （ E-UTRAN internal control plane interface ) 、 M3为 E-UTRAN与 EPC间的控制面接口 （control plane interface between E-UTRAN and EPC ) 。
某一特定小区可能同时被多个 MBSFN Area所覆盖， 这就是通常所说 的 MBSFN Area重叠覆盖（ overlapping )。 目前，小区支持 1至 8个 MBSFN Area的重叠覆盖。 其中， 小区是 MBSFN Area覆盖的最小单位， 一个 eNB 可能对应多个小区。
当某一小区存在重叠覆盖情况时， 该小区就可能同时具有多个 MCCH (因为每一个 MBSFN Area对应一个 MCCH )。对于每一个特定 MCCH来 说， 都具有 MCCH修改周期（MP, Modification Period ) , 且在 MCCH MP 中， MCCH所承载的内容是不允许发生变更的； 在 MCCH MP中， MCCH 信息还将重复的进行发送， 其中发送的时间间隔称之为 MCCH 重复周期 ( RP, Repeat Period ) , 以重复周期进行重复发送主要是为了提高 UE接收 MCCH信息的可靠性； MCCH MP与 MCCH RP的关系如图 3所示， 图 3 为现有技术中 MCCH MP与 MCCH RP的关系示意图， 在 MCCH MP ( n ) 中， MCCH发送的内容不能发生变更， 只能到下一个 MCCH MP处才可能 发生变更， MCCH RP表示了在 MCCH MP中 MCCH内容的重复发送。 UE 通过广播控制信道 ( BCCH, Broadcast Control Channel ) 的系统信息块 13 ( SIB 13 , System Information Block )即可获知该小区中所有的 MCCH以及 其相应的配置信息， 比如该小区中有多少条 MCCH, 每条 MCCH的 MP、 RP等相应参数。
MCCH与 MBSFN Area是——对应的。 UE通过读取 MCCH消息就可 以获知与其对应的 MBSFN Area的控制信息， 比如该 MBSFN Area的多播 子帧资源的配置信息， 该 MBSFN Area 中所有网络侧已经开始发送 ( ongoing ) 的 MBMS业务以及 ongoing的 MBMS service的控制参数如参 数 MBMS-SessionInfo-r9、 sessionId-r9、 serviceld-r9等。
多播信道（ MCH )是传输信道， 进行点到多点的传输， 对应的物理资 源是系统为传输 MBMS 业务所分配的多播资源。 一个载频可以承载多个 MCH, 承载特定 MCH 的物理信道是由一组图样的子帧所决定的， 这些子 帧未必是时间连续分配的， 这个图样被称为多播信道的子帧分配图样 ( MSAP, MCH subframe allocation pattern ) , 一个 MSAP描述一个 MCH 信道的物理资源。 在 LTE系统中， 每个 MBSFN区域的多播资源可以以子 帧为单位按照一定的图样进行划分， 每个图样所指示的资源构成一个 MCH。
多播业务信道（MTCH, Multicast Traffic Channel )是逻辑信道， 一个 MTCH承载一个或者多个业务（比如一个 TV节目叫做一个业务）的数据， 一个业务仅承载在一个 MTCH中， MTCH被映射到 MCH上进行传输， 一 个或者多个 MTCH可以映射到一个或者多个 MCH上， 即多个 MBMS 业 务可以映射到一个 MCH上。
釆用多小区发送模式进行 MBMS传输的特征包括，在 MBSFN 区域内 同步传输； 支持多小区 MBMS传输数据的合并； MTCH和 MCCH在 p-T-m 模式下映射到 MCH传输信道上等。
通过 MSAP信息， UE可以获知某一具体 MCH所对应的具体多播资源， 但是， 由于 MCH中包含了一个或多个 MBMS业务数据（比如一个或多个 MTCH ) , 所以， 需要通过 MBMS 动态调度信息来具体指明某一 MBMS 业务所对应的具体物理资源。 这样， UE在接收到某一特定 MBMS业务时 (比如该 UE感兴趣的 MBMS业务 MTCH1 ) , 就可以通过 MBMS动态调 度信息的指示获知该 MBMS业务的确切资源， 从而实现 MBMS业务的准 确接收，而对于 MCH中的其它多播子帧（比如承载非 MTCH1的多播子帧 ), UE保持静默状态， 不接收其子帧信息， 从而节省了 UE能耗。
现有公开的技术中， MBMS动态调度信息所调度或管辖的资源在时间 长度上被定义为动态调度周期（ Schedule period ) , 比如 320ms、 640ms等。 图 4为现有技术中调度块在动态调度周期中的设置与 MBMS业务的逻辑关 系示意图， 如图 4所示， 其中加粗的横线阴影表示调度块， 其它阴影表示 不同的 MBMS业务如图中的 MBMS service A、 MBMS service B和 MBMS service C, 空白部分表示没有数据或填充位。
在 MBMS业务的传输过程中， 上行反馈的应用也是现有技术中重要的 技术手段； 上行反馈是指， 由网络侧触发或 UE自行通过上行反馈信道， 将 正在 /准备接收 MBMS业务的 UE的某些状态属性上 ^艮给网络侧， 比如 UE 正在接收 /感兴趣接收的 MBMS业务标识）； 通过 UE上报的信息， 网络侧 可以获知其下属的 UE目前较为详细的信息， 比如 MBSFN area中某小区中 正在接收 /感兴趣接收的某一 MBMS业务的用户数量；网络侧通过获得的信 息可以进行一些设置调整或资源调度，比如开启 /关闭某一 MBMS业务的发 送。 典型的应用实例为： MBSFN area中各个 eNB分别要求其下属 UE反馈 其正在 /准备接收的 MBMS业务名称 （由 eNB触发上行反馈流程 ) , 正在 / 准备接收 MBMS业务的 UE会在上行反馈信道将其正在 /准备接收 MBMS 业务标识， 比如 MBMS业务 ID等， 反馈给其所属的 eNB。 各个 eNB根据 获得的信息， 比如正在接收 /感兴趣接收某一 MBMS业务的用户数，再结合 判别条件如在 MBSFN area中的 eNB中可能并没有用户在接收该 MBMS业 务或接收该 MBMS业务的用户数低于门限值等， 来决定该 MBMS业务数 据在 eNB上的开启或关断。
在现有 MBMS业务传输过程中， 对 MBMS业务调度时， MBMS业务 覆盖范围是以其所对应的 MBSFN area为基础进行传输的， 即该 MBMS业 务所对应的 MBSFN area包含几个小区 , 该 MBMS业务就会在这些小区中 进行传输。考虑到 MBMS业务在 MBSFN area中承载传输的复杂性（例如： 需要统一的资源调度、 用户面数据同步传输、 资源调度对于系统信息的影 响等）， 目前， MBMS 业务所对应的 MBSFN area一旦通过操作管理维护 ( OAM, Operation, Administration and Maintenance ) 配置好后, 将不会再 发生变化或极少发生变化。
可以看出， 对于 MBSFN area中某一具体 MBMS业务来说， 将会在整 个 MBSFN area 内进行传输； 而在实际应用中， 某一 MBMS 业务在整个 MBSFN area中进行发送有时是并不需要的， 例如， 在 MBSFN area中的某 个 /些小区中可能并没有用户在接收该 MBMS业务， 或接收该 MBMS业务 的用户数低于门限值时， 要是该 MBMS 业务继续在这个 /些小区中进行发 送， 无疑降低了无线资源的利用率， 并造成了发射功率的浪费。 发明内容
有鉴于此， 本发明的主要目的在于提供一种实现 MBMS业务调度的方 法及系统， 能够提高无线资源的利用率， 避免发射功率的浪费。
为达到上述目的， 本发明的技术方案是这样实现的：
一种实现 MBMS业务调度的方法， 预先设置调度条件， 还包括： 调度 网元按照调度条件， 以多播单频网络（MBSFN ) 区域内的小区为对象进行 多媒体广播多播业务 MBMS业务的调度。
所述调度条件为： 接收到用户设备 UE的上行反馈， 和 /或非 MBMS业 务需要占用的无线资源数， 和 /或来自操作管理维护 OAM的请求。 所述调度条件为接收到 UE的上行反馈；所述以 MBSFN区域内的小区 为对象进行 MBMS业务的调度包括：
所述调度网元根据从上行反馈获得的信息， 结合预设判别条件， 决定 所述 MBSFN区域内各小区的 MBMS业务数据在该小区的开启或关断。
所述从上行反馈获得的信息为：所述 MBSFN区域中某小区中正在接收 /准备接收的所述 MBMS业务的用户数量。
所述判别条件为：
在所述 MBSFN区域中的小区中是否存在接收所述 MBMS业务的用户， 或接收所述 MBMS业务的用户数低于预设门限值。
所述调度条件为非 MBMS业务需要占用的无线资源数，所述以 MBSFN 区域内的小区为对象进行 MBMS业务的调度包括：
所述调度网元根据非 MBMS业务所需要占用的无线资源的大小， 关闭 /开启所述 MBMS业务的发送。
所述调度条件为来自 OAM的请求，所述以 MBSFN区域内的小区为对 象进行 MBMS业务的调度包括：
所述调度网元根据 OAM的请求决定 MBSFN区域内各小区中的 MBMS 业务数据的开启或关断。
所述以 MBSFN 区域内的小区为对象的 MBMS 业务调度为： 在所述 MBSFN区域中， 以小区和 /或演进基站 eNB为颗粒度， 开启 /关断一个或一 个以上 MBMS业务。
所述以小区为颗粒度为：所述开启 /关断一个或一个以上 MBMS业务发 送时， 分别开启 /关断一个 eNB控制下的一个或多个小区。
所述 eNB为颗粒度为： 以一个 eNB控制下的所有小区为颗粒度， 所述 开启 /关断一个或一个以上 MBMS业务发送时， 针对该 eNB控制下的所有 小区同时开启 /关断。
所述调度网元为 eNB。 所述调度网元为多小区 /多播协调实体 MCE , 或广播组播业务中心 BM-SC, 或 MBMS网关 MBMS-GW;
调度网元按照调度条件，以多播单频网络 MBSFN区域内的小区为对象 进行多媒体广播多播业务 MBMS业务的调度具体包括：
所述调度网元根据来自 eNB 的信息， 以及开启 /关断某小区的 MBMS 业务传输后对于临小区 MBSFN合并增益的影响， 决定是否开启 /关断该 MBMS业务； 并将开启 /关闭 MBMS业务放入决定发送给相应 eNB; 收到 决定的 eNB开启 /关闭相应的 MBMS业务。
所述来自 eNB的信息为： 正在接收 /感兴趣接收的 MBMS业务的 UE 个数， 或 eNB做出其控制下的小区开启 /关断相应 MBMS业务的决定。
所述调度网元发送给 eNB的开启 /关闭 MBMS业务决定的指示信息包 括以下一种或任意组合：
某个 /某些 eNB下的一个或多个小区的开启 /关断指示，该指示信息中包 括小区标识； 或，
某个 /某些 eNB下的全部小区的开启 /关断指示，该指示信息中包括 eNB 标识 或,
整个调度网元下的所有小区同时开启 /关断指示。
一种实现 MBMS业务调度的系统， 至少包括调度网元， 其中设置有调 度条件， 用于按照调度条件， 以 MBSFN区域内的小区为对象进行 MBMS 业务的调度。
所述调度网元为 eNB;
或者， 所述调度网元为 MCE、 或 BM-SC、 或 MBMS-GW。
当所述调度网元为 MCE、 或 BM-SC、 或 MBMS-GW时， 该系统还包 括 eNB;
其中， 所述调度网元， 用于根据调度条件执行对 MBMS业务的开启或 关断的决定， 并将决定告知给 eNB; 所述 eNB , 用于执行对 MBMS业务的具体控制。
从上述本发明提供的技术方案可以看出， 本发明在调度网元中设置调 度条件， 并按照调度条件， 以 MBSFN区域内的小区为对象进行 MBMS业 务的调度。 通过本发明方法， 实现了以 MBSFN 区域内的小区为对象的 MBMS业务调度，避免了在没有用户接收 MBMS业务的小区， 或该小区接 收 MBMS业务的用户数低于门限值时， 关闭 MBMS业务在该小区的发送， 从而提高了无线资源的利用率， 避免了发射功率的浪费。 附图说明
图 1为现有 MBSFN区域逻辑示意图；
图 2为现有技术中 MBMS业务承载架构的示意图；
图 3为现有技术中 MCCH MP与 MCCH RP的关系示意图；
图 4为现有技术中调度块在动态调度周期中的设置与 MBMS业务的逻 辑关系示意图；
图 5为本发明实现 MBMS调度的方法的流程图；
图 6为本发明实现 MBMS调度的方法的第一实施例的流程图； 图 7为本发明实现 MBMS调度的方法的第二实施例的流程图； 图 8为本发明实施例中的 MBSFN区域组成逻辑示意图；
图 9为本发明实施例中，关闭 MBMS service B后无线资源承载示意图； 图 10为本发明实施例中， 关闭 MBMS service C后无线资源 载示意 图。 具体实施方式
图 5为本发明实现 MBMS调度的方法的流程图， 如图 5所示， 包括： 步骤 500: 预先设置调度条件。
本步骤中， 调度条件可以是接收到 UE的上行反馈， 和 /或非 MBMS业 务（Non-MBMS业务） 需要占用的无线资源数， 和 /或接收到来自 OAM的 请求等。
其中， 接收到 UE的上行反馈， 是指网络侧 （eNB或其他网元）触发 或 UE自行通过上行反馈信道， 将正在接收 /准备接收的 MBMS业务的 UE 的某些状态属性上报给网络侧， 比如 UE正在接收 /感兴趣接收的 MBMS业 务标识。
非 MBMS业务需要占用的无线资源数，是指 non-MBMS业务，也称为 单播业务（unicast业务） 所需要占用的无线资源的大小。
来自 OAM的请求， 是指来自 OAM的操作配置指示。
步骤 501 : 调度网元按照调度条件， 以 MBSFN区域内的小区为对象进 行 MBMS业务的调度。
对于调度条件釆用接收到 UE的上行反馈， 调度网元根据获得的信息， 比如 MBSFN area中某小区中正在接收 /准备接收的某一 MBMS业务的用户 数量，再结合判别条件如在 MBSFN area中的某个小区中可能并没有用户接 收该 MBMS 业务或接收该 MBMS 业务的用户数低于门限值等， 来决定 MBSFN区域内各小区的 MBMS业务数据在该小区的开启或关断；
对于调度条件釆用非 MBMS业务需要占用的无线资源数， 调度网元根 据 non-MBMS业务所需要占用的无线资源的大小， 关闭 /开启某一 MBMS 业务的发送。 比如， 当调度网元发现其单播业务所占用的无线资源不足时， 可以通过关闭 MBSFN区域内某小区或某些小区的 MBMS业务来释放部分 无线资源， 进一步地， 可以将释放的无线资源用于承载单播业务， 以进一 步提高资源利用率；
对于调度条件釆用来自 OAM的请求，调度网元根据 OAM的请求决定 MBSFN区域内各小区中的 MBMS业务数据的开启或关断。
本步骤中，调度网元可以是 eNB ,或网络侧的其它网元如 MCE、 BM-SC、 MBMS-GW其中的一个或多个。 当调度网元为 eNB时， 由 eNB根据调度 条件执行对 MBMS业务的开启或关断的调度； 当调度网元为其它网元时， 由其他网元根据调度条件执行对 MBMS业务的开启或关断的决定， 并将决 定告知给 eNB, 由 eNB来执行具体控制。
本发明中， 以 MBSFN区域内的小区为对象的 MBMS业务调度为， 在 MBSFN 区域中， 以小区和 /或 eNB 为颗粒度， 开启 /关断某一个 /某一些 MBMS业务。 其中， 以 eNB为颗粒度， 是指以一个 eNB控制下的所有小 区为颗粒度，即开启 /关断某一个 /某一些 MBMS业务发送时，将针对该 eNB 控制下的所有小区同时地开启 /关断； 以小区为颗粒度， 是指开启 /关断某一 个 /某一些 MBMS业务发送时， 可以分别开启 /关断一个 eNB控制下的一个 或多个小区。
本发明中， eNB 开启 /关断某一个或一某些 MBMS 业务为： 若干个 MBMS业务已经从 BM-SC发送到 eNB , 由 eNB执行开启 /关断这个或这些 MBMS业务，也就是说， 虽然 eNB已经得到了 MBMS业务数据，但由 eNB 执行是否在 Uu ( eNB到 UE的空口）接口上发射这些 MBMS业务， 更清楚 地说就是， 虽然 BM-SC在一个 MBSFN区域发送了若干个 MBMS业务， 但 eNB可以在 Uu接口上不发送这些 MBMS业务， UE不会接收到这些 MBMS业务。 这样， 在一个 MBSFN区域内， 无论其中的若干个 eNB是否 发送某个或某些 MBMS 业务， 这些 MBMS 业务都已经从 BM-SC 经过 MBMS-GW到达了 eNB, 只是在空口上被 eNB开启或关断发送。
eNB根据其自身或来自其它网元（如： MCE, BM-SC, MBMS-GW ) 的指示，控制其下的部分或全部小区开启 /关断部分或全部的 MBMS业务的 发送。
图 6为本发明实现 MBMS调度的方法的第一实施例的流程图， 如图 6 所示， 调度网元为 eNB, 在 MBSFN区域中有若干个 eNB , eNB 自身决定 是否在其控制下的一个或多个小区或全部小区， 开启 /关断某个或某几个 MBMS业务的发送。 包括： 步骤 600： UE上行反馈正在接收 /感兴趣接收的 MBMS业务。 步骤 601 : MBSFN区域内的各个 eNB接收其下属 UE的上行反馈信息。 eNB釆用的调度条件， 可以是接收到其控制下小区中 UE的上行反馈， 也可以是根据其 Non-MBMS需要占用的无线资源多少， 还可以是来自 OAM 的请求中的一个或多个。 本实施例中， 以 MBSFN区域中各个 eNB获取到其 下属的 UE上行反馈作为调度条件为例进行描述。 在 MBSFN区域中各个 eNB 获取到其下属的 UE上行反馈后， 根据各个 MBMS业务所正在接收或感兴趣 正准备接收的 UE的个数与门限值的比较， 开启或者关断当前 eNB所控制下 的一个或多个小区或全部小区中的某个 /某几个 MBMS业务的发送。
步骤 602: eNB 根据接收到的上行反馈信息， 决定开启 /关闭相应的 MBMS业务。 本步骤中， eNB在其控制下的小区开启或关断某个或某几个 MBMS业务的方法包括： 以小区为颗粒度， 开启或关断其控制下的一个或 多个小区； 以 eNB为颗粒度， 同时开启或关断其控制下的全部小区。
本发明强调的是以 MBSFN区域中的小区为对象实现 MBMS业务的调 度， 而具体的调度即如何决定开启 /关断某个或某些 MBMS , 属于本领域技 术人员的惯用技术手段， 其具体实现方案不用于限定本发明的保护范围。
步骤 603： eNB执行开启 /关闭相应的 MBMS业务。
图 7为本发明实现 MBMS调度的方法的第二实施例的流程图， 本实施 例中， MBSFN区域中若干个 eNB接收到来自其它网元（如 MCE或 BM-SC 或 MBMS-GW, 本实施例中以 MCE为例进行描述） 的指示信息， 执行在 其控制下的一个或多个或全部小区，开启 /关断某个或某几个 MBMS业务的 发送， 如图 7所示， 包括：
步骤 700: UE上行反馈正在 /感兴趣接收的 MBMS业务。
步骤 701 : MBSFN区域所属各个 eNB接收其下属 UE的上行反馈信息。 步骤 702: eNB将获取到的上行反馈信息发送给 MCE。
本步骤中， MBSFN区域中各个 eNB获取到其下属的 UE上行反馈后， 将获取的信息反馈给 MCE。 具体反馈给 MCE的信息， 可以是正在接收 /感 兴趣接收的 MBMS业务的 UE个数， 或 eNB做出其控制下小区开启 /关断 相应 MBMS业务的决定； 其中， 若由 eNB 出其控制下小区开启 /关断相 应 MBMS业务决定的话， eNB可以根据接收到其控制下小区中 UE的上行 反馈， 和 /或根据其 Non-MBMS需要占用的无线资源多少， 和 /或来自 OAM 的请求来进行调度。
步骤 703: MCE综合 eNB上行反馈信息和对合并增益的影响， 决定开 启 /关闭相应的 MBMS业务。
本步骤中， MCE根据其收到的信息， 同时考虑开启 /关断该小区的 MBMS业务传输后对于临小区 MBSFN合并增益的影响， 做出是否开启 /关 断该 MBMS业务。 具体实现属于本领域技术人员惯用技术手段， 其具体实 现方案不用限定本发明的保护范围， 这里不再详述。
步骤 704: MCE将开启 /关闭 MBMS业务决定发送给相应 eNB。
本步骤中， MCE发送给 eNB的开启 /关闭 MBMS业务决定的指示信息， 可以是以下方式的一种或任意组合：
1) 某个 /某些 eNB下的一个或多个小区的开启 /关断指示， 该指示信息 需要包括小区标识；
2) 某个 /某些 eNB下的全部小区的开启 /关断指示， 该指示信息需要包 括 eNB标识， 可以不包括小区标识；
3) 整个 MCE下的所有小区同时开启 /关断指示， 即该 MCE控制下的 全部 eNB下的全部小区的开启 /关断指示。
步骤 705: eNB开启 /关闭相应的 MBMS业务。 本步骤中， eNB接收来 自其它网元的指示信息， 由 eNB开启或者关断其控制下的一个或多个或全 部小区中， 某个 /某几个 MBMS业务的发送。
针对本发明方法还提供一种实现 MBMS业务调度的系统， 至少包括调 度网元， 其中设置有调度条件， 用于按照调度条件， 以 MBSFN区域内的小 区为对象进行 MBMS业务的调度。
调度网元为 eNB, 或网络侧的其它网元如 MCE、 BM-SC、 MBMS-GW 其中的一个或多个。 当调度网元为网络侧的其它网元时， 该系统还包括 eNB, 其中， 其他网元， 用于根据调度条件执行对 MBMS业务的开启或关 断的决定， 并将决定告知给 eNB; eNB , 用于执行对 MBMS业务的具体控 制。
下面结合图 8所示的 MBSFN区域组成逻辑图 ,对本发明方法进行详细 描述。图 8为本发明实施例中的 MBSFN区域组成逻辑示意图，如图 8所示， 4叚设 MBSFN 区域由 7小区组成（图 8 中圓圈内阴影部分显示的小区）。 MBSFN区域中承载了 3个 MBMS业务： MBMS service A、 MBMS service B 和 MBMS service C。为了简化，假设这三个 MBMS业务都已经处于 ongoing 状态， 且这三个业务对应同一 MCH, 具体的无线资源承载如图 4所示， 加 粗的横线阴影表示调度块， 其它阴影表示不同的 MBMS 业务图 4 中的 MBMS service A、 MBMS service B和 MBMS service C, 空白部分表示没有 数据或填充位。
第一实施例，假设 MBSFN area中各个 eNB下正在接收 MBMS业务的 UE通过上行反馈， 将其正在接收的 MBMS 业务名称上报给各自所属的 eNB;各个 eNB将其获得的反馈信息进行整，以某一 eNB比如 eNB X为例， 具体如表 1所示：
Figure imgf000016_0001
表 1
各个 eNB利用整合的信息， 对 MBMS业务进行调度， 确定开启 /关断 某个 /某些 MBMS业务。 第一实施例中具体实现如下： eNB X获知其所属小区中正在接收 MBMS service B的 UE个数为 0, 因此， eNB X决定关闭 MBMS service B在其所属小区的发送。 从无线资源 角度来看， 图 9为本发明实施例中， 关闭 MBMS service B后无线资源承载 示意图， eNB X的多播子帧配置和应用如图 9所示， MBMS service B所对 应的无线资源处不再发送 MBMS service B的业务数据。 进一步地， 考虑到 MBSFN技术合并的限制， 为了不影响 MBMS service A和 MBMS service C 的发送， MBMS service B在首 /尾处与 MBMS service A和 MBMS service C 复用的无线资源仍需要发送 MBMS service B业务数据； 因此， 图 9中以双 竖线标识的填充进行表示。
进一步地， 可以将关断的 MBMS service B业务所对应的多播资源， 如 图 9中空白所示的多播子帧来传输单播业务， 进一步提高了资源利用率。
第二实施例，假设 MBSFN area中各个 eNB下正在接收 MBMS业务的 UE通过上行反馈， 将其正在接收的 MBMS 业务名称上报给各自所属的 eNB;各个 eNB将其获得的反馈信息进行整，以某一 eNB比如 eNB Y为例， 具体如表 2所示：
Figure imgf000017_0001
表 2
eNB将整合的信息上报给 MCE;上报给 MCE的信息可以是各个 MBMS service正在接收的 UE个数，或者是 eNB对于各个 MBMS service发送与否 的决定。 第二实施例中， 以 eNB上报给 MCE其对于各个 MBMS service发 送与否的决定； 具体如下：
eNB Y获知其所属小区中正在接收 MBMS service C的 UE个数为 0, 因此， eNB Y初步决定关闭 MBMS service C在其所属小区的发送， 并将其 初步决定发送给 MCE; MCE接收到来自 MBSFN area中各个 eNB的反馈 信息后，综合考虑 eNB Y初步关闭 MBMS service C的决定， 以及关闭 eNB Y中 MBMS service C的发送对于临小区 MBMS service C接收的影响， 做 出最终关闭 eNB Y上 MBMS service C的决定；
MCE将最终决定发送给 eNB Y, eNB Y关闭 MBMS service C在其所 属小区的发送。 图 10为本发明实施例中， 关闭 MBMS service C后无线资 源 载示意图， eNB Y的多播子帧配置和应用如图 10所示， MBMS service C 所对应的无线资源处不再发送 MBMS service C 的业务数据。 考虑到 MBSFN技术合并的限制， 为了不影响 MBMS service B 的发送， MBMS service C在首处与 MBMS service B 复用的无线资源仍需要发送 MBMS service C业务数据， 如图 10中以交叉斜线标识的填充所示。 由于 MBMS service C位于调度周期的末尾， 调度周期内不会对于其后续的 MBMS业务 发送产生影响， 因此不再考虑末尾的填充。
进一步地， 利用将关断的 MBMS service C业务所对应的多播资源（如 图 10中空白所示的多播子帧）来传输单播业务，以进一步提高资源利用率。
第三实施例， 假设 MBSFN area中各个 eNB决定其所属小区的 MBMS 业务发送的开启或关断。 各个 eNB将执行开启或关断某一 /某些 MBMS业 务的发送， 第三实施例中以某一 eNB如 eNB Z关断 MBMS service B为例 进行说明。
eNB Z决定并执行关闭 MBMS service B在其所属小区的发送； 从无线 资源角度， eNB Z的多播子帧配置和应用如图 9所示。
第四实施例， 假设 MBSFN area中由 MCE决定各个 eNB所属小区的 MBMS业务发送的开启或关断； 各个 eNB根据 MCE的决定， 执行开启或 关断某一 /某些 MBMS业务的发送。 以某一 eNB如 eNB M 关断 MBMS service B为例， eNB M决定并执行关闭 MBMS service B在其所属小区的发 送， 从无线资源角度， eNB M的多播子帧配置和应用如图 9所示。 第五实施例， 假设 MBSFN area中各个 eNB决定其所属小区的 MBMS 业务发送的开启或关断。 各个 eNB将执行开启或关断某一 /某些 MBMS业 务的发送； 以某一 eNB如 eNB N关断 MBMS service B为例， eNB N依据 其 Non-MBMS业务所需要的无线资源不足， 关闭 MBMS service B在其所 属小区的发送， 从无线资源角度， eNB N的多播子帧配置和应用如图 9所 示。
第六实施例， 假设 MBSFN area中各个 eNB决定其所属小区的 MBMS 业务发送的开启或关断。 各个 eNB将执行开启或关断某一 /些 MBMS业务 的发送， 以某一 eNB如 eNB Q关断 MBMS service B为例， eNB Q依据其 所属 OAM的配置， 关闭 MBMS service B在其所属小区的发送 , 从无线资 源角度， eNB Q的多播子帧配置和应用如图 9所示。
以上所述， 仅为本发明的较佳实施例而已， 并非用于限定本发明的保 护范围， 凡在本发明的精神和原则之内所作的任何修改、 等同替换和改进 等， 均应包含在本发明的保护范围之内。

Claims

权利要求书
1、 一种实现 MBMS业务调度的方法， 其特征在于， 预先设置调度条 件，还包括： 调度网元按照调度条件， 以多播单频网络 MBSFN区域内的小 区为对象进行多媒体广播多播业务 MBMS业务的调度。
2、 根据权利要求 1所述的方法， 其特征在于， 所述调度条件为： 接收 到用户设备 UE的上行反馈， 和 /或非 MBMS业务需要占用的无线资源数， 和 /或来自操作管理维护 OAM的请求。
3、 根据权利要求 1所述的方法， 其特征在于， 所述调度条件为接收到 UE的上行反馈； 所述以 MBSFN区域内的小区为对象进行 MBMS业务的 调度包括：
所述调度网元根据从上行反馈获得的信息， 结合预设判别条件， 决定 所述 MBSFN区域内各小区的 MBMS业务数据在该小区的开启或关断。
4、 根据权利要求 3所述的方法， 其特征在于， 所述从上行反馈获得的 信息为： 所述 MBSFN区域中某小区中正在接收 /准备接收的所述 MBMS业 务的用户数量。
5、 根据权利要求 3所述的方法， 其特征在于， 所述判别条件为： 在所述 MBSFN区域中的小区中是否存在接收所述 MBMS业务的用户， 或接收所述 MBMS业务的用户数低于预设门限值。
6、根据权利要求 1所述的方法，其特征在于，所述调度条件为非 MBMS 业务需要占用的无线资源数， 所述以 MBSFN 区域内的小区为对象进行 MBMS业务的调度包括：
所述调度网元根据非 MBMS业务所需要占用的无线资源的大小， 关闭 /开启所述 MBMS业务的发送。
7、 根据权利要求 1 所述的方法， 其特征在于， 所述调度条件为来自 OAM的请求， 所述以 MBSFN区域内的小区为对象进行 MBMS业务的调 度包括：
所述调度网元根据 OAM的请求决定 MBSFN区域内各小区中的 MBMS 业务数据的开启或关断。
8、根据权利要求 1~7任一项所述的方法，其特征在于，所述以 MBSFN 区域内的小区为对象的 MBMS业务调度为： 在所述 MBSFN区域中， 以小 区和 /或演进基站 eNB为颗粒度， 开启 /关断一个或一个以上 MBMS业务。
9、根据权利要求 8所述的方法， 其特征在于， 所述以小区为颗粒度为： 所述开启 /关断一个或一个以上 MBMS业务发送时，分别开启 /关断一个 eNB 控制下的一个或一个以上个小区。
10、根据权利要求 8所述的方法， 其特征在于， 所述 eNB为颗粒度为： 以一个 eNB 控制下的所有小区为颗粒度， 所述开启 /关断一个或一个以上 MBMS业务发送时， 针对该 eNB控制下的所有小区同时开启 /关断。
11、 根据权利要求 1所述的方法， 其特征在于， 所述调度网元为 eNB。
12、 根据权利要求 1 所述的方法， 其特征在于， 所述调度网元为多小 区 /多播协调实体 MCE, 或广播组播业务中心 BM-SC , 或 MBMS 网关 MBMS-GW;
调度网元按照调度条件，以多播单频网络 MBSFN区域内的小区为对象 进行多媒体广播多播业务 MBMS业务的调度具体包括：
所述调度网元根据来自 eNB 的信息， 以及开启 /关断某小区的 MBMS 业务传输后对于临小区 MBSFN合并增益的影响， 决定是否开启 /关断该 MBMS业务； 并将开启 /关闭 MBMS业务放入决定发送给相应 eNB; 收到 决定的 eNB开启 /关闭相应的 MBMS业务。
13、根据权利要求 12所述的方法， 其特征在于， 所述来自 eNB的信息 为： 正在接收 /感兴趣接收的 MBMS业务的 UE个数， 或 eNB做出其控制 下的小区开启 /关断相应 MBMS业务的决定。
14、 根据权利要求 12或 13所述的方法， 其特征在于， 所述调度网元 发送给 eNB的开启 /关闭 MBMS业务决定的指示信息包括以下一种或任意 组合：
某个 /某些 eNB下的一个或多个小区的开启 /关断指示，该指示信息中包 括小区标识； 或，
某个 /某些 eNB下的全部小区的开启 /关断指示，该指示信息中包括 eNB 标识 或,
整个调度网元下的所有小区同时开启 /关断指示。
15、 一种实现 MBMS业务调度的系统， 其特征在于， 至少包括调度网 元， 其中设置有调度条件， 用于按照调度条件， 以 MBSFN区域内的小区为 对象进行 MBMS业务的调度。
16、根据权利要求 15所述的系统，其特征在于，所述调度网元为 eNB; 或者， 所述调度网元为 MCE、 或 BM-SC、 或 MBMS-GW。
17、 根据权利要求 15 所述的系统， 其特征在于， 当所述调度网元为 MCE、 或 BM-SC、 或 MBMS-GW时， 该系统还包括 eNB；
其中， 所述调度网元， 用于根据调度条件执行对 MBMS业务的开启或 关断的决定， 并将决定告知给 eNB;
所述 eNB , 用于执行对 MBMS业务的具体控制。
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