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WO2012171293A1 - 一种多媒体广播多播业务传输方法、系统及用户设备 - Google Patents

一种多媒体广播多播业务传输方法、系统及用户设备 Download PDF

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Publication number
WO2012171293A1
WO2012171293A1 PCT/CN2011/081280 CN2011081280W WO2012171293A1 WO 2012171293 A1 WO2012171293 A1 WO 2012171293A1 CN 2011081280 W CN2011081280 W CN 2011081280W WO 2012171293 A1 WO2012171293 A1 WO 2012171293A1
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WO
WIPO (PCT)
Prior art keywords
mbms
carrier
cell
request
mbms service
Prior art date
Application number
PCT/CN2011/081280
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English (en)
French (fr)
Inventor
许辉
马子江
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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 WO2012171293A1 publication Critical patent/WO2012171293A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services

Definitions

  • Multimedia broadcast multicast service transmission method system and user equipment
  • the present invention relates to the field of mobile communications, and in particular, to a Multimedia Broadcast Multicast Service (MBMS) service transmission method, system, and user equipment.
  • MBMS Multimedia Broadcast Multicast Service
  • the 3rd Generation Partnership Project (3GPP) proposed the MBMS service, which is a technology that transmits data from one data source to multiple targets, and implements the network ( The sharing of resources, including the core network and the access network, improves the utilization of network resources, especially air interface resources.
  • the MBMS service defined by 3GPP can not only realize the multicast and broadcast of plain text low-rate message classes, but also realize the broadcast and multicast of high-speed multimedia services, provide a variety of rich video, audio and multimedia services, and conform to future mobile data.
  • the development trend provides a better business prospect for the development of third-generation (3G) digital communications.
  • MBMS service is introduced in the Long Term Evolution (LTE) Release 9 (R9) system and optimized in LTE Release 10 (R10).
  • MBMS services carry control signaling (also known as MBMS control signaling) and user data in the system (also The common transmission is called MBMS service.
  • the control signaling will inform the receiving end, such as the terminal, user equipment (User Equipment, UE) and other corresponding control parameters, and direct the receiving end to the corresponding location to receive it.
  • UE User Equipment
  • Interested MBMS services ie corresponding user data).
  • the MBMS control signaling (control information, including: configuration information of the MBMS service, etc.) is transmitted in the LTE system through a Multicast Control Channel (MCCH), and the MBMS service is through a multicast traffic channel (MTCH, Multicast Traffic Channel) for transmission.
  • MCCH Multicast Control Channel
  • MTCH Multicast Traffic Channel
  • the configuration parameters of the MCCH repetition period and the modification period are all configured by the network side, and the network side sends the UE to the UE through the System Information Blockl 3 (SIB 13) in the Broadcast Control Channel (BCCH).
  • SIB 13 System Information Blockl 3
  • the UE can learn the configuration parameters of the MCCH repetition period and the modification period by reading the SIB13 in the BCCH, and the UE can read the MCCH information in the corresponding position.
  • the MBMS control signaling and the MBMS service are transmitted by using a Multicast Broadcast Single Frequency Network Area (MBSFN Area), and the control signaling and user data are sent in the MBSFN area.
  • MBSFN Area Multicast Broadcast Single Frequency Network Area
  • the cell or eNB uses the MBSFN technology for the synchronous transmission. The purpose is to enable the UE to obtain the corresponding combining gain when receiving.
  • the MBSFN technology requires each cell in the MBSFN area to send the same data content on the same time-frequency resource. Unified scheduling and planning of resources of each cell.
  • a multi-cell/multicast coordination entity (MCE) network element is used for unified scheduling and planning of radio resources.
  • MCE multi-cell/multicast coordination entity
  • a cell has only one uplink carrier and downlink carrier.
  • LTE-A Long Term Evolution-Advance
  • an uplink and downlink of one LTE-A cell may be configured with multiple component carriers (Component Carrier, CO, multiple CCs).
  • Component Carrier, CO, multiple CCs can be aggregated to form a transmission bandwidth of up to 100 MHz, and the UE can perform data transmission and reception on one or more CCs (depending on the capabilities of the UE itself), which is called carrier aggregation.
  • Carrier Aggregation CA
  • the idle mode UE always resides in a certain one.
  • the component carrier On the component carrier.
  • a component carrier activation process is required to manage the carrier, so that the UE can perform data scheduling on multiple component carriers at the same time.
  • multiple carriers may be deployed in the same geographic area.
  • a primary cell (Pcell) and one or more secondary cells (Scells) may be defined, and a Pcell and an Scell corresponding to one UE are collectively referred to as a service.
  • Serving cell a radio resource control connected (RRC Connected) UE
  • Pcell primary cell
  • Scells secondary cells
  • a Pcell and an Scell corresponding to one UE are collectively referred to as a service.
  • Serving cell The MBMS and CA capable UEs in 3GPP Rel-10 can receive MBMS services on at least the Pcell.
  • FIG. 1 shows the flow of the MBMS service.
  • the first phase is the service announcement.
  • the purpose of the service announcement is to send the MBMS service related information, such as service profile, service parameters, service start time, and so on.
  • the second phase is Session Start; the third phase is MBMS notification; the fourth phase is Data Transfer; the fifth phase is Session Stop.
  • the UE may be in idle mode (RRC Idle) or RRC Connected for MBMS service reception; to reduce system load, the MBMS service may be deployed on one component carrier or multiple component carriers.
  • RRC Idle idle mode
  • RRC Connected for MBMS service reception to reduce system load
  • the MBMS service may be deployed on one component carrier or multiple component carriers.
  • the MBMS service is transmitted in a multi-carrier environment.
  • the main object of the present invention is to provide an MBMS transmission method, system, and user equipment, which can receive MBMS services in a multi-carrier environment.
  • An MBMS service transmission method comprising:
  • the network side sends indication information for indicating the carrier where the MBMS service is located to the UE;
  • the UE receives the MBMS service according to the indication information.
  • the network side sends indication information for indicating a carrier where the MBMS service is located to the UE:
  • the network side sends the indication information of the physical cell identifier (PCI), the frequency point information, the bandwidth information, and the component carrier index information of the MBMS carrier to the UE through the MBMS advertisement information or the system message.
  • PCI physical cell identifier
  • the network side sends the indication information of the physical cell identifier (PCI), the frequency point information, the bandwidth information, and the component carrier index information of the MBMS carrier to the UE through the MBMS advertisement information or the system message.
  • the MBMS announcement information is an Electronic Service Guide (ESG) information
  • the system message is one or more of SIB3, SIB5, SIB 13, and a new system message.
  • the network side sends the indication information for indicating the carrier where the MBMS service is located to the UE:
  • the network side sends indication information for indicating the carrier where the MBMS service is located on each carrier deployed in the system.
  • the UE receives the MBMS service according to the indication information: when the serving cell of the UE includes the carrier where the MBMS service is located, the UE directly receives the MBMS service on the carrier where the MBMS is located;
  • the UE When the serving cell of the UE does not include the carrier where the MBMS service is located, the UE turns to the cell where the MBMS is located to receive the MBMS service.
  • the receiving of the MBMS service by the UE to the carrier where the MBMS is located is: When the UE is in the idle mode, the UE determines whether the MBMS carrier cell satisfies the cell reselection condition, and if yes, enters the MBMS carrier cell through the cell reselection process, and receives the MBMS service.
  • the UE moves to the carrier where the MBMS is located to receive the MBMS service: when the UE is in the connected mode, the UE sends a request to the network side;
  • the network side After receiving the request, the network side determines whether the MBMS carrier cell satisfies the handover condition. If yes, sends an acceptance response to the UE, and switches the UE to the MBMS carrier cell to receive the MBMS service.
  • the UE sends the request to: the UE carries the request by using the RRC signaling; where the content of the request includes one or more of a request indication, an MBMS service identifier, an MBSFN area identifier, and an MBMS carrier indication.
  • the method further includes:
  • the network side sends a rejection response to the UE. After receiving the rejection response, the UE sends the request again within a preset time, and waits for the handover to the MBMS carrier cell.
  • the method further includes: when the number of times the UE sends the request exceeds the preset number of allowed requests, or the waiting time exceeds When the preset request timer is set, the request is stopped.
  • An MBMS service transmission system where the system includes: a network side and a UE; wherein, the network side is configured to send indication information for indicating a carrier where the MBMS service is located
  • the UE is configured to receive the MBMS service according to the indication information.
  • the network side further includes an indication unit, configured to include PCI, frequency point information, bandwidth information, and component carrier of the MBMS carrier by using MBMS advertisement information or system message.
  • an indication unit configured to include PCI, frequency point information, bandwidth information, and component carrier of the MBMS carrier by using MBMS advertisement information or system message.
  • One or more indication information of the index information is sent to the UE.
  • the UE is specifically configured to: when the serving cell includes the carrier where the MBMS service is located, directly receive the MBMS service on the carrier where the MBMS is located; when the serving cell does not include the carrier where the MBMS service is located, switch to the MBMS The cell where the carrier is located receives the MBMS service.
  • the UE further includes a selecting unit, a requesting unit, and a receiving unit, where the selecting unit is configured to determine, when the UE is in an idle mode, whether the MBMS carrier cell satisfies a cell reselection condition, and if yes, pass the cell weight The selection process is to enter the MBMS carrier cell; the requesting unit is configured to send the request to the network side when the UE is in the connected mode, and is further configured to: after the receiving unit receives the reject response returned by the network side, Send a request, waiting to switch to the MBMS carrier cell;
  • the receiving unit is configured to receive carrier indication information of the MBMS service, a response returned by the network side, and receive the MBMS service;
  • the network side further includes a response unit, a switching unit, where
  • the response unit is configured to: after receiving the request sent by the requesting unit, determine whether the MBMS carrier cell satisfies a handover condition, and if yes, send an acceptance response to the receiving unit; if not, send a rejection response to the Receiving unit
  • the switching unit is configured to switch the UE to an MBMS carrier cell.
  • the requesting unit is further configured to stop sending the request when the number of times the request is sent exceeds a preset number of allowed requests, or when the waiting time exceeds a preset request timer.
  • An MBMS service transmission user equipment where the user equipment includes: a selection unit, a request unit, and a receiving unit;
  • the determining unit when in the idle mode, determines whether the MBMS carrier cell in the received indication information satisfies the cell reselection condition, and if yes, enters the MBMS carrier cell by using a cell reselection process;
  • the requesting unit is configured to: when in the connected mode, send a request to the network side; and further, after receiving the reject response returned by the network side, send the request again within a preset time, and wait for the handover to the MBMS carrier cell;
  • the receiving unit is configured to receive carrier indication information of the MBMS service, a response returned by the network side, and perform reception of the MBMS service.
  • the requesting unit is further configured to stop sending the request when the number of times the request is sent exceeds a preset number of allowed requests, or when the waiting time exceeds a preset request timer.
  • the present invention sends the indication information for indicating the carrier where the MBMS service is located to the UE, and the UE performs the MBMS service according to the indication information, and solves the problem that the MBMS is received when the carrier that the UE camps on or serves is different from the carrier where the MBMS service is located.
  • the problem of the service realizes the transmission of the MBMS service in the multi-carrier environment, and satisfies the requirement of the UE to receive the MBMS service in the multi-carrier environment.
  • Figure 1 is a schematic diagram of a transmission phase of an existing MBMS service
  • FIG. 2 is a schematic flowchart of an implementation process of an MBMS service transmission method according to the present invention
  • FIG. 3 is a schematic flowchart of an implementation of a method for transmitting an MBMS service according to a first embodiment of the present invention
  • FIG. 4 is a schematic flowchart of a second embodiment of an MBMS service transmission method according to the present invention
  • FIG. 6 is a schematic structural diagram of a structure of a user equipment for transmitting MBMS services according to the present invention. detailed description
  • the network side sends indication information indicating a carrier where the MBMS service is located to the UE; and the UE receives the MBMS service according to the indication information.
  • FIG. 2 shows an implementation flow of an MBMS service transmission method according to the present invention. As shown in FIG. 2, the method includes the following steps:
  • Step 201 the network side sends indication information to the UE
  • the indication information is used to indicate the carrier information of the MBMS service, and may specifically include one of a physical cell identifier (PCI) of the MBMS carrier, frequency point information, bandwidth information, and component carrier index information.
  • PCI physical cell identifier
  • the network side includes a radio access network (RAN) and a core network (Core Network, CN);
  • RAN radio access network
  • CN Core Network
  • the network side sending indication information may be sent by using the MBMS advertisement information, that is, all users in the MBMS service area are broadcasted by the Broadcast Multicast Service Centre (BM-SC) before the start of the MBMS service session, where
  • the broadcasted MBMS advertisement information may be ESG information; or may be sent by using a system message, specifically, the evolved node (eNB) transmits on the air interface (Uu) to all UEs in the eNB lower cell; here, in order to ensure all users or UEs
  • the indication information may be received, where the MBMS advertisement information or system message is sent on all carriers deployed by the system.
  • the system message is one or more of SIB3, SIB5, SIB 13, and newly added system information.
  • the system message is one or more of SIB3, SIB5, SIB 13, and newly added system information.
  • Step 202 The UE receives the MBMS service according to the indication information.
  • the UE when the serving cell of the UE includes the carrier where the MBMS service is located, the UE directly receives the MBMS service on the carrier where the MBMS is located; otherwise, the UE, with the assistance of the network side, turns to the carrier receiving where the MBMS is located.
  • MBMS business when the serving cell of the UE includes the carrier where the MBMS service is located, the UE directly receives the MBMS service on the carrier where the MBMS is located; otherwise, the UE, with the assistance of the network side, turns to the carrier receiving where the MBMS is located.
  • MBMS business when the serving cell of the UE includes the carrier where the MBMS service is located, the UE directly receives the MBMS service on the carrier where the MBMS is located; otherwise, the UE, with the assistance of the network side, turns to the carrier receiving where the MBMS is located.
  • FIG. 3 is a flowchart of an implementation of the first embodiment of the method for transmitting an MBMS service according to the present invention.
  • the UE is in an idle mode, the component carrier that the UE camps on is CC1, and the MBMS service is deployed in one or more CCs other than the CC1.
  • the UE receives or is interested in receiving the MBMS service.
  • the first embodiment includes the following steps:
  • Step 301 The network side uses MBMS announcement information or system message to indicate MBMS.
  • the indication information of the carrier where the service is located is sent to the UE;
  • the network side sends the MBMS advertisement information or the system message on all the carriers, and the advertisement information may specifically be the ESG information, and the system message may specifically be one or more of SIB3, SIB5, SIB13, and the newly added system message.
  • the indication information is used to indicate the carrier information of the MBMS service, and may specifically include one or more of PCI, frequency point information, bandwidth information, and component carrier index information of the MBMS carrier;
  • Step 302 The UE receives and reads the indication information.
  • Step 303 the UE determines whether the MBMS carrier cell meets the cell reselection condition; if yes, step 304 is performed, otherwise, step 305 is performed;
  • the UE first determines whether the MBMS carrier cell satisfies the condition of cell reselection, that is, performs measurement ordering on the neighboring cells according to the S-criterion and the R-criterion; and when the MBMS carrier cell When the cell reselection condition is met, the MBMS carrier cell is used as the highest priority for cell reselection;
  • Step 304 The UE enters the MBMS carrier cell by using the cell reselection process, and receives the MBMS service in the MBMS carrier cell, and the current processing procedure ends.
  • the specific cell reselection process refers to the MBMS service that the UE is interested in receiving when the MBMS carrier cell satisfies the cell reselection condition. Therefore, the carrier cell that provides the MBMS service may be used as the highest priority cell first, if present. For a plurality of such cells, the carrier cell that provides the received MBMS service that is of interest to the UE is further used as the highest priority cell, or the priority is determined according to the order of the MBMS carrier index, such as the lowest index value or the highest index value. As the highest priority, the UE can reselect to the MBMS carrier cell;
  • the UE After the UE enters the MBMS carrier cell, it receives the system message and the MCCH message, and then receives the MBMS service according to the above message.
  • Step 305 The UE camps on the original cell or other non-MBMS carrier cell, and the current processing procedure ends.
  • FIG. 4 shows an implementation flow of Embodiment 2 of the MBMS service transmission method of the present invention.
  • the UE is in the connection mode and has no CA capability.
  • the UE deploys the component carrier CC1 and the MBMS service in one or more other than CC1.
  • the UE receives or is interested in receiving the MBMS service.
  • the second embodiment includes the following steps:
  • Step 401 The network side sends the indication information for indicating the carrier where the MBMS service is located to the UE by using the MBMS advertisement information or the system message.
  • the network side sends the MBMS advertisement information or the system message on all the carriers, and the MBMS advertisement information may specifically be the ESG information, and the system message may specifically be one of the SIB3, the SIB5, the SIB 13 and the newly added system message.
  • the indication information is used to indicate the carrier information of the MBMS service, and may specifically include one or more of PCI, frequency point information, bandwidth information, and component carrier index information of the MBMS carrier;
  • Step 402 The UE receives and reads the indication information.
  • the UE reads the MBMS advertisement message or system message on CC1 to obtain the indication information.
  • Step 403 The UE sends a request to the network side to request to receive the MBMS service.
  • the request may be carried in RRC signaling, where the RRC signaling may be RRC connection reconfiguration complete information, RRC connection reestablishment request information, RRC connection reestablishment completion information, connection setup complete information, cell update information, and random access request information. , measurement report, or dedicated RRC signaling;
  • the content of the request includes a request indication, an MBMS service identifier, an MBSFN area identifier,
  • One or more of the MBMS carrier indications are provided.
  • Step 404 after receiving the request sent by the UE, the network side determines whether the MBMS carrier cell satisfies the handover condition, if yes, step 405 is performed, otherwise step 407 is performed;
  • the network side comprehensively considers the link signal quality, the Radio Resource Management (RRM) algorithm, and the cell load to determine the MBMS carrier. Whether the cell can serve as the target cell of the UE.
  • RRM Radio Resource Management
  • Step 405 The network side sends an acceptance response to the UE.
  • the network side When the network side determines that the MBMS carrier cell can serve as the target cell of the UE, the network side sends the acceptance response information to the UE; the acceptance response information may be carried by the RRC signaling, where the RRC signaling may be the existing RRC signaling. Or dedicated RRC signaling.
  • Step 406 The network side switches the UE to the MBMS carrier cell, and the UE receives the MBMS service in the MBMS carrier cell, and the current processing procedure ends.
  • the UE releases the RRC connection in the original cell, and enters the target MBMS carrier cell to receive the MBMS service in the MBMS carrier cell.
  • the UE may be in the idle mode or the connected mode in the target MBMS carrier cell.
  • Step 407 The network side sends a reject response to the UE.
  • the network side When the network side determines that the MBMS carrier cell cannot be the target cell of the UE, the network side sends the reject response information to the UE; the reject response information may be carried by the RRC signaling, where the RRC signaling may be the existing RRC signaling. Or dedicated RRC signaling.
  • Step 408 The UE continues to send a request to the network side on the CC1, and waits for the handover to the MBMS carrier cell, and the current processing procedure ends.
  • the UE continues to send the request, after the UE receives the reject response message sent by the network side, waits for a period of time, and then sends the request again.
  • the time when the UE sends the request may be randomly determined within a period of time, such as a network side definition.
  • the UE randomly selects a time value to send a request within (0, t) time;
  • the UE may send multiple requests, and the network side may preset the number of allowed requests N or the request timer T to limit the number of times the UE sends the request.
  • the number of requests N or the waiting time > T, the UE still does not enter the target MBMS carrier. In the cell, the UE stops transmitting the request.
  • the UE when the UE is a UE with limited CA capability, such as when the serving cell of the UE includes carriers CC1 and CC2, the MBMS service is deployed in one or more other than CC1 and CC2.
  • the UE On the CC, when the UE is in the connected mode and receives or is interested in receiving the MBMS service, at this time, in the process of MBMS service transmission, the UE may read the MBMS announcement on CC1 or CC2 when performing step 402.
  • the message or the system message is the same as the above except that the indication information is obtained, and details are not described herein again.
  • Figure 5 is a block diagram showing the structure of the MBMS service transmission system of the present invention. As shown in Figure 5, the system includes: a network side and a UE;
  • the network side is configured to send indication information for indicating a carrier where the MBMS service is located.
  • the UE is configured to receive the MBMS service according to the indication information.
  • the network side further includes an indication unit 50, configured to, by using an MBMS advertisement information or a system message, an indication of one or more of PCI, frequency point information, bandwidth information, and component carrier index information including an MBMS carrier.
  • the information is sent to the UE.
  • the MBMS advertisement information may be specifically ESG information
  • the system message may be one or more of SIB3, SIB5, SIB13, and a newly added system message.
  • the UE is specifically configured to: when the serving cell includes the carrier where the MBMS service is located, directly receive the MBMS service on the carrier where the MBMS is located; when the serving cell does not include the carrier where the MBMS service is located, the UE turns to The cell where the MBMS is located receives the MBMS service.
  • the UE further includes a selecting unit 53, a requesting unit 54, and a receiving unit 55;
  • the selecting unit 53 is configured to determine whether the MBMS carrier cell satisfies the cell reselection condition when the UE is in the idle mode, and if yes, enter the MBMS carrier cell by using the cell reselection process; specifically, first determining whether the MBMS carrier cell satisfies the cell weight
  • the selected condition is that the neighboring cells are sorted according to the S-criterion and the R-criterion; and when the MBMS carrier cell satisfies the cell reselection condition, the MBMS carrier cell is regarded as the highest priority. District re-election
  • the requesting unit 54 is configured to send the request to the network side when the UE is in the connection mode, and is further configured to: after the receiving unit 55 receives the rejection response returned by the network side, send the request again within a preset time, and wait for the handover.
  • the MME signaling may be RRC connection reconfiguration completion information, RRC connection reestablishment request information, RRC connection reestablishment completion information, connection establishment completion information, cell update information, Random access request information, measurement report, or dedicated RRC signaling; the content of the request includes one or more of a request indication, an MBMS service identifier, an MBSFN area identifier, and an MBMS carrier indication;
  • the receiving unit 55 is configured to receive a response returned by the network side, and receive the MBMS service.
  • the network side further includes a response unit 52, a switching unit 51, wherein
  • the response unit 52 is configured to: after receiving the request sent by the requesting unit 54, determine whether the MBMS carrier cell satisfies the handover condition, and if yes, send an acceptance response to the receiving unit 55; if not, send a rejection response To the receiving unit 55; specifically, the network side comprehensively considers factors such as the link signal quality, the RRM algorithm, and the cell load, and determines whether the MBMS carrier cell can serve as the target cell of the UE; the accept/reject response information can pass the RRC.
  • Signaling bearer where the RRC signaling may be existing RRC signaling or dedicated RRC signaling.
  • the switching unit 51 is configured to switch the UE to an MBMS carrier cell
  • the requesting unit 54 is further configured to: when the number of times the request is sent exceeds a preset number of allowed requests, or when the waiting time exceeds a preset request timer, stopping the sending request; here, the requesting unit 54 may send more
  • the network side may preset the number of allowed requests N or the request timer T to limit the number of times the UE sends the request.
  • N or the waiting time > T the UE still does not enter the target MBMS carrier cell, and then stops transmitting the request.
  • Figure 6 is a block diagram showing the structure of the MBMS service transmission user equipment of the present invention. As shown in Figure 6, the user equipment includes: a selection unit 61, a request unit 62, and a receiving unit 63.
  • the MBMS carrier cell in the received indication information satisfies the cell reselection condition, and if yes, enters the MBMS carrier cell by using the cell reselection process; specifically, first determining whether the MBMS carrier cell satisfies the cell reselection The condition is that the neighboring cells are sorted according to the S-criterion and the R-criterion; and when the MBMS carrier cell satisfies the cell reselection condition, the MBMS carrier cell is used as the highest priority for cell weighting. selected;
  • the requesting unit 62 is configured to: when in the connected mode, send a request to the network side; and further, after receiving the reject response returned by the network side, send the request again within a preset time, and wait for the handover to the MBMS carrier cell.
  • the request may be carried in RRC signaling, and the RRC signaling may be RRC connection reconfiguration complete information, RRC connection reestablishment request information, RRC connection reestablishment completion information, connection setup complete information, cell update information, random access request Information, measurement report, or dedicated RRC signaling;
  • the content of the request includes one or more of a request indication, an MBMS service identifier, an MBSFN area identifier, and an MBMS carrier indication;
  • the receiving unit 63 is configured to receive a response returned by the network side, and receive the MBMS service.
  • the requesting unit 62 is further configured to: when the number of times the request is sent exceeds a preset number of allowed requests, or when the waiting time exceeds a preset request timer, stop sending the request; where, the requesting unit 62 may send more
  • the network side may preset the number of allowed requests N or the request timer T to limit the number of times the UE sends the request.
  • N or the waiting time > T the UE still does not enter the target MBMS carrier cell, and then stops transmitting the request.

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Abstract

本发明提供了一种MBMS业务传输方法、系统及用户设备,所述方法包括:网络侧发送用于指示MBMS业务所在载波的指示信息给UE;UE根据所述指示信息,接收所述MBMS业务。本发明通过将用于指示MBMS业务所在载波的指示信息发送至UE,UE根据所述指示信息进行MBMS业务的接收,解决了当UE驻留或服务的载波与MBMS业务所在载波不同时,接收MBMS业务的问题,实现了MBMS业务在多载波环境中的传输,满足了UE在多载波环境中接收MBMS业务的需求。

Description

一种多媒体广播多播业务传输方法、 系统及用户设备 技术领域
本发明涉及移动通信领域, 尤其涉及一种多媒体广播多播(Multimedia Broadcast Multicast Service, MBMS )业务传输方法、 系统及用户设备。 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 各种高带宽多媒体业务, 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。 这些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 (3rd Generation Partnership Project, 3 GPP )提出了 MBMS业务, 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的多播和广播, 还能够 实现高速多媒体业务的广播和多播, 提供多种丰富的视频、 音频和多媒体 业务, 顺应了未来移动数据发展的趋势, 为第三代(3rd Generation, 3G ) 数字通信的发展提供了更好的业务前景。
目前, 在长期演进( Long Term Evolution, LTE )版本 9 ( R9 ) 系统中 引入了 MBMS业务, 并在 LTE版本 10 ( R10 ) 中进行了优化。 MBMS业 务在系统中承载需要控制信令(也称为 MBMS控制信令)和用户数据(也 称为 MBMS业务)的共同传输来进行实现; 其中, 控制信令将会告知接收 端, 如终端、 用户设备(User Equipment, UE )等相应的控制参数, 指引接 收端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 MBMS控制信令(控制信息, 包括: MBMS业务的配置信息等)在 LTE系统中是通过多播控制信道( Multicast Control Channel , MCCH )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。
MCCH重复周期和修改周期的配置参数都是由网络侧进行配置的, 网 路侧通过广播控制信道( Broadcast Control Channel, BCCH ) 中的系统信息 块 13 ( System Information Blockl 3 , SIB 13 )发送给 UE; UE通过读取 BCCH 中的 SIB13可以获知 MCCH重复周期和修改周期的配置参数, UE可以在 相应的位置上读取 MCCH信息。
现有技术中, MBMS控制信令和 MBMS业务是以多播广播单频网络区 域 ( Multicast Broadcast Single Frequency Network Area, MBSFN Area )来进 行传输的, 在 MBSFN区域中发送控制信令和用户数据将以小区或 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, MBSFN技术需要 MBSFN区域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。 目前使用多小区 /多播协调实体( Multi-cell/multicast Coordination Entity, MCE ) 网元来进行无线资源的统一调度和规划。
LTE 系统中, 小区只有一个上行载波和下行载波。 在长期演进 -高级 ( Long Term Evolution- Advance, LTE-A ) 阶段, 为了提高上下行的传输速 率,一个 LTE-A小区的上下行可以配置有多个分量载波( Component Carrier, CO , 多个 CC可以汇聚在一起形成最大 100MHz的传输带宽, UE可以在 一个或多个 CC上进行数据收发(取决于 UE自身的能力), 这称为载波聚 合(Carrier Aggregation, CA )。 假设一个 LTE-A小区有多个上下行分量载 波, 那么对于小区内一个处于空闲模式的 UE, 为了简化空闲模式 UE的行 为, 降低 UE的功耗, 所以空闲模式 UE总是驻留在某一个分量载波上。 但 是当 UE进入连接模式以后, 为了能让 UE以更高的速率收发数据, 需要有 一个分量载波激活过程,对载波进行管理,让 UE能同时在多个分量载波上 进行数据调度。
在 CA场景中,相同的地理区域可能部署多个载波。针对一个连接模式 ( Radio Resource Control Connected, RRC Connected ) UE, 可以定义一个 主小区( Primary cell, Pcell)和一个或多个辅小区( Secondary cell, Scell ) , 一个 UE对应的 Pcell和 Scell统称为服务小区( Serving cell )。在 3GPP Rel-10 中具有 MBMS和 CA能力的 UE至少可以在 Pcell上接收 MBMS业务。
图 1 为 MBMS 业务发送的流程示意; 其中第一个阶段为业务公告 ( Service announcement ), 业务公告的目的是向用户发送 MBMS业务的相 关信息, 如业务简介, 业务参数, 业务开始时间等等; 第二阶段为会话开 始 ( Session Start ); 第三阶段为 MBMS业务通知( MBMS notification ); 第 四阶段为数据传输( Data transfer ); 第五阶段为任务结束( Session Stop )。
UE可以处于空闲模式(RRC Idle )或者 RRC Connected进行 MBMS 业务的接收; 为了降低系统负载, MBMS业务可以部署在一个分量载波或 者多个分量载波上。
在多载波环境中传输 MBMS 业务, 存在以下问题: 对于空闲模式的 UE和没有 CA能力的 UE只能驻留在一个 CC上,如果 MBMS部署在另外 的 CC上, 则 UE可能无法接收 MBMS业务; 对于 CA能力受限的 UE, 如 果 MBMS部署在 UE所汇聚 CC之外的 CC上, UE同样无法接收 MBMS 业务。 发明内容
有鉴于此, 本发明的主要目的在于提供一种 MBMS传输方法、 系统及 用户设备, 能够实现在多载波环境下接收 MBMS业务。
为达到上述目的, 本发明的技术方案是这样实现的:
一种 MBMS业务传输方法, 所述方法包括:
网络侧发送用于指示 MBMS业务所在载波的指示信息给 UE;
UE根据所述指示信息, 接收所述 MBMS业务。
进一步地, 所述网络侧发送用于指示 MBMS业务所在载波的指示信息 给 UE为:
网络侧通过 MBMS公告信息或系统消息, 将包含有 MBMS载波的物 理小区标识(PCI )、 频点信息、 带宽信息、 分量载波索引信息的一种或多 种的指示信息发送给 UE。
所述 MBMS公告信息为电子业务导航( Electronic Service Guide, ESG ) 信息;
其中, 所述系统消息为 SIB3、 SIB5、 SIB 13和新增的系统消息的一种 或多种。
进一步地, 所述网络侧发送用于指示 MBMS业务所在载波的指示信息 给 UE为: 网络侧在系统中部署的每一个载波上发送用于指示 MBMS业务 所在载波的指示信息。
进一步地, 所述 UE根据所述指示信息, 接收所述 MBMS业务为: 当 UE的服务小区中包含有 MBMS业务所在的载波时, UE直接在所 述 MBMS所在的载波上接收 MBMS业务;
当 UE的服务小区中不包含 MBMS业务所在的载波时, UE转向 MBMS 所在载波的小区接收 MBMS业务。
进一步地, 所述 UE转向 MBMS所在的载波接收 MBMS业务为: 当所述 UE处于空闲模式, UE判断 MBMS载波小区是否满足小区重 选条件, 若满足, 则通过小区重选过程进入 MBMS载波小区, 接收 MBMS 业务。
进一步地, 所述 UE转向 MBMS所在的载波接收 MBMS业务为: 当所述 UE处于连接模式, UE发送请求至网络侧;
网络侧接收到所述请求后, 判断 MBMS载波小区是否满足切换条件, 若满足, 则发送接受响应至 UE, 切换所述 UE至 MBMS载波小区, 进行 MBMS业务的接收。
进一步地, 所述 UE发送请求为: UE通过 RRC信令承载所述请求; 其中 ,所述请求的内容包括请求指示、 MBMS业务标识、 MBSFN区域标识、 MBMS载波指示的一种或多种。
进一步地, 所述判断 MBMS载波小区是否满足切换条件之后, 所述方 法还包括:
当 MBMS载波小区不满足切换条件时, 网络侧发送拒绝响应至 UE, UE接收到所述拒绝响应后, 在预设的时间内再次发送请求, 等待切换到 MBMS载波小区。
进一步地, 所述在预设的时间内再次发送请求, 等待切换到 MBMS载 波小区之后, 所述方法还包括: 当所述 UE发送请求的次数超过预设的允许 请求次数, 或, 等待时间超过预设的请求定时器时, 停止发送请求。
一种 MBMS业务传输系统, 所述系统包括: 网络侧和 UE; 其中, 所述网络侧, 用于发送用于指示 MBMS 业务所在载波的指示信息给
UE;
所述 UE, 用于根据所述指示信息, 接收所述 MBMS业务。
其中, 所述网络侧进一步包括指示单元, 用于通过 MBMS公告信息或 系统消息, 将包含有 MBMS载波的 PCI、 频点信息、 带宽信息、 分量载波 索引信息的一种或多种的指示信息发送给 UE。
其中, 所述 UE, 具体用于当服务小区中包含有 MBMS业务所在的载 波时, 直接在所述 MBMS所在的载波上接收 MBMS业务; 当服务小区中 不包含 MBMS业务所在的载波时,转向 MBMS所在载波的小区接收 MBMS 业务。
其中,所述 UE进一步包括选择单元、请求单元、以及接收单元;其中, 所述选择单元, 用于 UE处于空闲模式时, 判断 MBMS载波小区是否 满足小区重选条件, 若满足, 则通过小区重选过程进入 MBMS载波小区; 所述请求单元, 用于 UE处于连接模式, 发送请求至网络侧; 还用于在 所述接收单元接收到网络侧返回的拒绝响应后, 在预设的时间内再次发送 请求, 等待切换到 MBMS载波小区;
所述接收单元, 用于接收 MBMS业务的载波指示信息, 网络侧返回的 响应, 并进行 MBMS业务的接收;
所述网络侧进一步包括响应单元、 切换单元; 其中,
所述响应单元, 用于接收到所述请求单元发送的请求后, 判断 MBMS 载波小区是否满足切换条件, 若满足, 则发送接受响应至所述接收单元; 若不满足, 发送拒绝响应至所述接收单元;
所述切换单元, 用于切换所述 UE至 MBMS载波小区。
进一步地, 所述请求单元, 还用于当发送请求的次数超过预设的允许 请求次数, 或, 等待时间超过预设的请求定时器时, 停止发送请求。
一种 MBMS业务传输用户设备, 所述用户设备包括: 选择单元、 请求 单元、 以及接收单元; 其中,
所述选择单元,用于处于空闲模式时,判断接收到的指示信息中 MBMS 载波小区是否满足小区重选条件,若满足,则通过小区重选过程进入 MBMS 载波小区; 所述请求单元, 用于处于连接模式时, 发送请求至网络侧; 还用于在 接收到网络侧返回的拒绝响应后, 在预设的时间内再次发送请求, 等待切 换到 MBMS载波小区;
所述接收单元, 用于接收 MBMS业务的载波指示信息, 网络侧返回的 响应, 并进行 MBMS业务的接收。
其中, 所述请求单元, 还用于当发送请求的次数超过预设的允许请求 次数, 或, 等待时间超过预设的请求定时器时, 停止发送请求。
本发明通过将用于指示 MBMS业务所在载波的指示信息发送至 UE, UE根据所述指示信息进行 MBMS业务的接收, 解决了当 UE驻留或服务 的载波与 MBMS业务所在载波不同时, 接收 MBMS业务的问题, 实现了 MBMS业务在多载波环境中的传输,满足了 UE在多载波环境中接收 MBMS 业务的需求。 附图说明
图 1为现有 MBMS业务的发送阶段示意图;
图 2为本发明 MBMS业务传输方法的实现流程示意图;
图 3为本发明 MBMS业务传输方法的实施例一的实现流程示意图; 图 4为本发明 MBMS业务传输方法的实施例二的实现流程示意图; 图 5为本发明 MBMS业务传输系统的组成结构示意图;
图 6为本发明 MBMS业务传输用户设备的组成结构示意图。 具体实施方式
本发明的基本思想为: 网络侧发送用于指示 MBMS业务所在载波的指 示信息给 UE; UE根据所述指示信息, 接收所述 MBMS业务。
为使本发明的目的、 技术方案和优点更加清楚明白, 以下举实施例并 参照附图, 对本发明进一步详细说明。 图 2示出了本发明 MBMS业务传输方法的实现流程, 如图 2所示, 所 述方法包括下述步驟:
步驟 201 , 网络侧发送指示信息给 UE;
本步驟中, 所述指示信息用于指示 MBMS业务所在的载波信息, 具体 可以包括 MBMS载波的物理小区标识( Physical Cell ID, PCI )、 频点信息、 带宽信息、 分量载波索引信息的一种或多种;
这里, 所述网络侧包括无线接入网 ( Radio Access Network, RAN )和 核心网 ( Core Network, CN );
网络侧发送指示信息可以通过 MBMS公告信息进行发送,即在 MBMS 业务会话开始之前, 由广播组播业务中心 (Broadcast Multicast Service Centre , BM-SC )在 MBMS业务区域中的所有用户进行广播, 其中所述广 播的 MBMS公告信息可以为 ESG信息;也可以通过系统消息进行发送,具 体由演进节点 ( eNB )在空口 ( Uu )上对 eNB下小区中的所有 UE发送; 这里, 为了保证所有用户或 UE能够收到所述指示信息, 所述 MBMS公告 信息或系统消息在系统部署的所有载波上发送, 优选地, 所述系统消息为 SIB3、 SIB5、 SIB 13和新增的系统信息的一种或多种。
步驟 202, UE根据所述指示信息, 接收所述 MBMS业务;
本步驟中, 当 UE的服务小区中包含有 MBMS业务所在的载波时, 则 UE直接在所述 MBMS所在的载波上接收 MBMS业务; 否则 , UE在网络 侧的协助下, 转向 MBMS所在的载波接收 MBMS业务。
图 3示出了本发明 MBMS业务传输方法的实施例一的实现流程, 实施 例一中 UE处于空闲模式, UE驻留的分量载波为 CC1 , MBMS业务部署在 CC1以外的其他一个或多个 CC上, UE接收或感兴趣接收 MBMS业务; 如图 3所示, 所述实施例一包括下述步驟:
步驟 301 ,网络侧通过 MBMS公告信息或系统消息,将用于指示 MBMS 业务所在载波的指示信息发送给 UE;
这里, 网络侧在所有载波上发送 MBMS公告信息或系统消息, 所述公 告信息具体可以为 ESG信息,所述系统消息具体可以为 SIB3、 SIB5、 SIB13, 和新增的系统消息的一种或多种; 所述指示信息用于指示 MBMS业务所在 的载波信息, 具体可以包括 MBMS载波的 PCI、 频点信息、 带宽信息、 分 量载波索引信息的一种或多种;
步驟 302, UE接收并读取所述指示信息;
步驟 303 , UE判断 MBMS载波小区是否满足小区重选条件; 若是, 则 执行步驟 304, 否则, 执行步驟 305;
具体地, 本步驟中, UE首先判断 MBMS载波小区是否满足小区重选 的条件, 即根据 S准则( S-criterion )和 R准则( R-criterion )对邻小区进行 测量排序; 且当 MBMS载波小区满足小区重选条件时, 将 MBMS载波小 区作为最高优先级进行小区重选;
步驟 304, UE通过小区重选过程进入 MBMS载波小区, 并在 MBMS 载波小区接收 MBMS业务, 当前处理流程结束;
这里,具体的小区重选过程是指 MBMS载波小区满足小区重选条件时, 考虑到 UE感兴趣接收的 MBMS业务, 因此,可先将提供 MBMS业务的载 波小区作为最高优先级的小区, 如果存在多个这样的小区, 则进一步将提 供所述 UE感兴趣的接收的 MBMS业务的载波小区作为最高优先级的小区, 或根据 MBMS载波索引的排序确定优先级, 如将最低索引值或者最高索引 值作为最高优先级, 如此, UE便可以重选到 MBMS载波小区;
UE进入 MBMS载波小区后, 接收系统消息和 MCCH消息, 然后根据 上述消息, 进行 MBMS业务的接收。
步驟 305 , UE驻留在原小区或其他非 MBMS载波小区, 当前处理流程 结束。 图 4示出了本发明 MBMS业务传输方法的实施例二的实现流程, 实施 例二中 UE处于连接模式, 且没有 CA能力, UE在分量载波 CC1 , MBMS 业务部署在 CC1 以外的其他一个或多个 CC 上, UE接收或感兴趣接收 MBMS业务; 如图 4所示, 所述实施例二包括下述步驟:
步驟 401 ,网络侧通过 MBMS公告信息或系统消息,将用于指示 MBMS 业务所在载波的指示信息发送给 UE;
这里, 网络侧在所有载波上发送 MBMS公告信息或系统消息, 所述 MBMS公告信息具体可以为 ESG信息, 所述系统消息具体可以为 SIB3、 SIB5、 SIB 13 和新增的系统消息的一种或多种; 所述指示信息用于指示 MBMS业务所在的载波信息,具体可以包括 MBMS载波的 PCI、频点信息、 带宽信息、 分量载波索引信息的一种或多种;
步驟 402, UE接收并读取所述指示信息;
具体地, UE在 CC1上读取所述 MBMS公告消息或系统消息, 得到所 述指示信息。
步驟 403 , UE发送请求至网络侧, 请求接收 MBMS业务;
所述请求可以承载于 RRC信令, 这里, RRC信令可以为 RRC连接重 配置完成信息、 RRC连接重建请求信息、 RRC连接重建完成信息、 连接建 立完成信息、 小区更新信息、 随机接入请求信息、 测量报告、 或专用 RRC 信令;
所述请求的内容包括请求指示、 MBMS业务标识、 MBSFN区域标识、
MBMS载波指示的一种或多种。
步驟 404, 网络侧收到 UE发送的请求后, 判断 MBMS载波小区是否 满足切换条件, 如果满足, 则执行步驟 405, 否则执行步驟 407;
具体地, 网络侧根据链路信号质量、 无线资源管理 (Radio Resource Management, RRM ) 算法和小区负载等因素综合考虑, 判断 MBMS载波 小区是否可以作为 UE的目标小区。
步驟 405 , 网络侧向 UE发送接受响应;
当网络侧判断 MBMS载波小区可以作为 UE的目标小区时, 网络侧向 UE发送接受响应信息; 所述接受响应信息可以通过 RRC信令承载, 这里, 所述 RRC信令可以为现有 RRC信令或者专用 RRC信令。
步驟 406, 网络侧将 UE切换到 MBMS载波小区, UE在所述 MBMS 载波小区接收 MBMS业务, 当前处理流程结束;
这里, UE在原小区释放 RRC连接, 进入目标 MBMS载波小区, 在所 述 MBMS载波小区进行 MBMS业务的接收; 其中, UE在目标 MBMS载 波小区可以为空闲模式, 也可以为连接模式。
步驟 407 , 网络侧向 UE发送拒绝响应;
当网络侧判断 MBMS载波小区不能作为 UE的目标小区时, 网络侧向 UE发送拒绝响应信息; 所述拒绝响应信息可以通过 RRC信令承载, 这里, 所述 RRC信令可以为现有 RRC信令或者专用 RRC信令。
步驟 408, UE在 CC1上继续向网络侧发送请求, 等待切换到 MBMS 载波小区, 当前处理流程结束;
这里, UE继续发送请求是指 UE接收到网络侧发送的拒绝响应消息后, 等待一段时间, 然后再次发送请求; 其中, 所述 UE发送请求的时间可以在 一段时间内随机确定, 如网络侧定义一个时间 t, 则 UE在( 0, t )时间内, 随机选择一个时间值发送请求;
进一步地, UE可以发送多次请求, 网络侧可以预先设置允许请求次数 N或请求定时器 T来限制 UE发送请求的次数, 当请求次数 =N或者等待时 间 > T, UE仍未进入目标 MBMS载波小区, 则 UE停止发送请求。
应当理解, 当所述 UE为 CA能力有限的 UE, 如 UE的服务小区包括 载波 CC1和 CC2时, MBMS业务部署在 CC1和 CC2之外的其他一个或多 个 CC上, UE处于连接模式, 并且接收或感兴趣接收 MBMS业务时, 此 时,在 MBMS业务传输的过程中,除去在执行步驟 402时, UE可以在 CC1 或 CC2上读取所述 MBMS公告消息或系统消息,得到所述指示信息外,其 他处理过程与上述相同, 不再赘述。
图 5示出了本发明 MBMS业务传输系统的组成结构示意,如图 5所示, 所述系统包括: 网络侧和 UE; 其中,
所述网络侧, 用于发送用于指示 MBMS 业务所在载波的指示信息给
UE;
所述 UE, 用于根据所述指示信息, 接收所述 MBMS业务。
优选地 , 所述网络侧进一步包括指示单元 50 , 用于通过 MBMS公告信 息或系统消息, 将包含有 MBMS载波的 PCI、 频点信息、 带宽信息、 分量 载波索引信息的一种或多种的指示信息发送给 UE; 其中, 所述 MBMS公 告信息具体可以为 ESG信息,所述系统消息具体可以为 SIB3、 SIB5、 SIB13, 和新增的系统消息的一种或多种。
进一步地, 所述 UE, 具体用于当服务小区中包含有 MBMS业务所在 的载波时, 直接在所述 MBMS所在的载波上接收 MBMS业务; 当服务小 区中不包含 MBMS业务所在的载波时, 转向 MBMS所在载波的小区接收 MBMS业务。
优选地, 所述 UE进一步包括选择单元 53、 请求单元 54、 以及接收单 元 55; 其中,
所述选择单元 53 , 用于 UE处于空闲模式时, 判断 MBMS载波小区是 否满足小区重选条件, 若是, 则通过小区重选过程进入 MBMS载波小区; 具体为, 首先判断 MBMS载波小区是否满足小区重选的条件, 即根据 S准 则( S-criterion )和 R准则( R-criterion )对邻小区进行测量排序;且当 MBMS 载波小区满足小区重选条件时, 将 MBMS载波小区作为最高优先级进行小 区重选;
所述请求单元 54, 用于 UE处于连接模式, 发送请求至网络侧; 还用 于在所述接收单元 55接收到网络侧返回的拒绝响应后, 在预设的时间内再 次发送请求, 等待切换到 MBMS 载波小区; 这里, 所述请求可以承载于 RRC信令, RRC信令可以为 RRC连接重配置完成信息、 RRC连接重建请 求信息、 RRC连接重建完成信息、 连接建立完成信息、 小区更新信息、 随 机接入请求信息、 测量报告、 或专用 RRC信令; 所述请求的内容包括请求 指示、 MBMS业务标识、 MBSFN区域标识、 MBMS载波指示的一种或多 种;
所述接收单元 55, 用于接收网络侧返回的响应, 并进行 MBMS业务的 接收;
所述网络侧进一步包括响应单元 52、 切换单元 51 ; 其中,
所述响应单元 52, 用于接收到所述请求单元 54发送的请求后, 判断 MBMS载波小区是否满足切换条件, 若满足, 则发送接受响应至所述接收 单元 55; 若不满足, 发送拒绝响应至所述接收单元 55; 具体地, 网络侧根 据链路信号质量、 RRM算法和小区负载等因素综合考虑, 判断 MBMS载 波小区是否可以作为 UE 的目标小区; 所述接受 /拒绝响应信息可以通过 RRC信令承载, 这里, 所述 RRC信令可以为现有 RRC信令或者专用 RRC 信令。
所述切换单元 51 , 用于切换所述 UE至 MBMS载波小区;
进一步地, 所述请求单元 54, 还用于当发送请求的次数超过预设的允 许请求次数, 或, 等待时间超过预设的请求定时器时, 停止发送请求; 这 里, 请求单元 54可以发送多次请求, 网络侧可以预先设置允许请求次数 N 或请求定时器 T来限制 UE发送请求的次数, 当请求次数 =N或者等待时间 > T, UE仍未进入目标 MBMS载波小区, 则停止发送请求。 图 6示出了本发明 MBMS业务传输用户设备的组成结构,如图 6所示, 所述用户设备包括: 选择单元 61、 请求单元 62、 以及接收单元 63; 其中, 所述选择单元 61 , 用于在处于空闲模式时, 判断接收到的指示信息中 MBMS载波小区是否满足小区重选条件, 若是, 则通过小区重选过程进入 MBMS载波小区; 具体为, 首先判断 MBMS载波小区是否满足小区重选的 条件, 即根据 S准则( S-criterion )和 R准则( R-criterion )对邻小区进行测 量排序; 且当 MBMS载波小区满足小区重选条件时, 将 MBMS载波小区 作为最高优先级进行小区重选;
所述请求单元 62, 用于在处于连接模式时, 发送请求至网络侧; 还用 于在接收到网络侧返回的拒绝响应后, 在预设的时间内再次发送请求, 等 待切换到 MBMS载波小区; 这里, 所述请求可以承载于 RRC信令, RRC 信令可以为 RRC连接重配置完成信息、 RRC连接重建请求信息、 RRC连 接重建完成信息、 连接建立完成信息、 小区更新信息、 随机接入请求信息、 测量报告、 或专用 RRC信令; 所述请求的内容包括请求指示、 MBMS业务 标识、 MBSFN区域标识、 MBMS载波指示的一种或多种;
所述接收单元 63 , 用于接收网络侧返回的响应, 并进行 MBMS业务的 接收。
进一步地, 所述请求单元 62, 还用于当发送请求的次数超过预设的允 许请求次数, 或, 等待时间超过预设的请求定时器时, 停止发送请求; 这 里, 请求单元 62可以发送多次请求, 网络侧可以预先设置允许请求次数 N 或请求定时器 T来限制 UE发送请求的次数, 当请求次数 =N或者等待时间 > T, UE仍未进入目标 MBMS载波小区, 则停止发送请求。
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。

Claims

权利要求书
1、 一种多媒体广播多播 MBMS业务传输方法, 其特征在于, 所述方 法包括:
网络侧发送用于指示 MBMS业务所在载波的指示信息给用户设备 UE; UE根据所述指示信息, 接收所述 MBMS业务。
2、 根据权利要求 1所述的方法, 其特征在于, 所述网络侧发送用于指 示 MBMS业务所在载波的指示信息给 UE为:
网络侧通过 MBMS公告信息或系统消息, 将包含有 MBMS载波的物 理小区标识 PCI、 频点信息、 带宽信息、 分量载波索引信息的一种或多种的 指示信息发送给 UE。
3、 根据权利要求 2所述的方法, 其特征在于, 所述 MBMS公告信息 为电子业务导航 ESG信息,所述系统消息为系统消息块 SIB3、 SIB5、 SIB 13 和新增的系统消息一种或多种。
4、 根据权利要求 1所述的方法, 其特征在于, 所述网络侧发送用于指 示 MBMS业务所在载波的指示信息给 UE为: 网络侧在系统中部署的每一 个载波上发送用于指示 MBMS业务所在载波的指示信息。
5、 根据权利要求 1所述的方法, 其特征在于, 所述 UE根据所述指示 信息, 接收所述 MBMS业务为:
当 UE的服务小区中包含有 MBMS业务所在的载波时, UE直接在所 述 MBMS所在的载波上接收 MBMS业务;
当 UE的服务小区中不包含 MBMS业务所在的载波时, UE转向 MBMS 所在载波的小区接收 MBMS业务。
6、 根据权利要求 5所述的方法, 其特征在于, 所述 UE转向 MBMS 所在的载波接收 MBMS业务为:
当所述 UE处于空闲模式, UE判断 MBMS载波小区是否满足小区重 选条件, 若满足, 则通过小区重选过程进入 MBMS载波小区, 接收 MBMS 业务。
7、 根据权利要求 5所述的方法, 其特征在于, 所述 UE转向 MBMS 所在的载波接收 MBMS业务为:
当所述 UE处于连接模式, UE发送请求至网络侧;
网络侧接收到所述请求后, 判断 MBMS载波小区是否满足切换条件, 若满足, 则发送接受响应至 UE, 切换所述 UE至 MBMS载波小区, 进行 MBMS业务的接收。
8、 根据权利要求 7所述的方法, 其特征在于, 所述 UE发送请求为: UE通过 RRC信令承载所述请求; 其中, 所述请求的内容包括请求指示、 MBMS业务标识、 MBSFN区域标识、 MBMS载波指示的一种或多种。
9、 根据权利要求 7所述的方法, 其特征在于, 所述判断 MBMS载波 小区是否满足切换条件之后, 所述方法还包括:
当 MBMS载波小区不满足切换条件时, 网络侧发送拒绝响应至 UE, UE接收到所述拒绝响应后, 在预设的时间内再次发送请求, 等待切换到 MBMS载波小区。
10、 根据权利要求 9所述的方法, 其特征在于, 所述在预设的时间内 再次发送请求, 等待切换到 MBMS载波小区之后, 所述方法还包括: 当所 述 UE发送请求的次数超过预设的允许请求次数,或,等待时间超过预设的 请求定时器时, 停止发送请求。
11、 一种 MBMS业务传输系统, 其特征在于, 所述系统包括: 网络侧 和 UE; 其中,
所述网络侧, 用于发送用于指示 MBMS 业务所在载波的指示信息给
UE;
所述 UE, 用于根据所述指示信息, 接收所述 MBMS业务。
12、 根据权利要求 11所述的系统, 其特征在于, 所述网络侧进一步包 括指示单元, 用于通过 MBMS公告信息或系统消息, 将包含有 MBMS载 波的 PCI、 频点信息、 带宽信息、 分量载波索引信息的一种或多种的指示信 息发送给 UE。
13、 根据权利要求 11所述的系统, 其特征在于, 所述 UE, 具体用于 当月良务小区中包含有 MBMS业务所在的载波时, 直接在所述 MBMS所在 的载波上接收 MBMS业务; 当服务小区中不包含 MBMS业务所在的载波 时, 转向 MBMS所在载波的小区接收 MBMS业务。
14、 根据权利要求 13所述的系统, 其特征在于, 所述 UE进一步包括 选择单元、 请求单元、 以及接收单元; 其中,
所述选择单元, 用于 UE处于空闲模式时, 判断 MBMS载波小区是否 满足小区重选条件, 若满足, 则通过小区重选过程进入 MBMS载波小区; 所述请求单元, 用于 UE处于连接模式, 发送请求至网络侧; 还用于在 所述接收单元接收到网络侧返回的拒绝响应后, 在预设的时间内再次发送 请求, 等待切换到 MBMS载波小区;
所述接收单元, 用于接收 MBMS业务的载波指示信息, 网络侧返回的 响应, 并进行 MBMS业务的接收;
所述网络侧进一步包括响应单元、 切换单元; 其中,
所述响应单元, 用于接收到所述请求单元发送的请求后, 判断 MBMS 载波小区是否满足切换条件, 若满足, 则发送接受响应至所述接收单元; 若不满足, 发送拒绝响应至所述接收单元;
所述切换单元, 用于切换所述 UE至 MBMS载波小区。
15、 根据权利要求 14所述的系统, 其特征在于, 所述请求单元, 还用 于当发送请求的次数超过预设的允许请求次数, 或, 等待时间超过预设的 请求定时器时, 停止发送请求。
16、一种 MBMS业务传输用户设备,其特征在于, 所述用户设备包括: 选择单元、 请求单元、 以及接收单元; 其中,
所述选择单元,用于处于空闲模式时,判断接收到的指示信息中 MBMS 载波小区是否满足小区重选条件,若满足,则通过小区重选过程进入 MBMS 载波小区;
所述请求单元, 用于处于连接模式时, 发送请求至网络侧; 还用于在 接收到网络侧返回的拒绝响应后, 在预设的时间内再次发送请求, 等待切 换到 MBMS载波小区;
所述接收单元, 用于接收 MBMS业务的载波指示信息, 网络侧返回的 响应, 并进行 MBMS业务的接收。
17、 根据权利要求 16所述的用户设备, 其特征在于, 所述请求单元, 还用于当发送请求的次数超过预设的允许请求次数, 或, 等待时间超过预 设的请求定时器时, 停止发送请求。
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