KR100790086B1 - Method for transceiving/receiving service availability information of multimedia broadcast/multicast service - Google Patents

Abstract

The present invention relates to a mobile communication system that provides a multimedia broadcasting / multicast service (MBMS service) to a plurality of terminals located in a plurality of cells using a code division multiple access technique. In order to support mobility of a terminal receiving an MBMS service, a radio network controller (RNCS) transmits an MBMS service validity message indicating availability and resource information of at least one MBMS service valid in a corresponding cell to each of a plurality of managed cells. do. The terminal determines whether the desired MBMS service can be received in the current cell now or later by receiving the MBMS service validity message, and requests the desired MBMS service or reselects another cell. The present invention not only improves the continuity of MBMS service reception when the terminals using the MBMS service move, but also can reduce the overhead of RRC connection establishment for the indiscriminate MBMS service request.

MBMS, MBMS Service Availability, Lack of Resource, Non Service Area (NSA), Service Area (SA), Out of Service Area (OSA), MCCH

Description

METHOOD FOR TRANSCEIVING / RECEIVING SERVICE AVAILABILITY INFORMATION OF MULTIMEDIA BROADCAST / MULTICAST SERVICE}

1 is a block diagram of a mobile communication system for a conventional multimedia broadcasting / multicast service (MBMS).

2 is a message flow diagram illustrating a typical multimedia broadcast / multicast service procedure.

3A and 3B illustrate control messages transmitted over a Multimedia Broadcast / Multicast Service Control Channel (MCCH).

4 is a diagram illustrating a movement of a terminal provided with a multimedia broadcasting / multicast service.

5 is a diagram illustrating a procedure for transmitting control information for a multimedia broadcast / multicast service according to a preferred embodiment of the present invention.

6 is a format form of a service validity message transmitted through MCCH

7 is a flow diagram illustrating operation of a radio network controller (RNC) for transmitting MBMS paging messages in accordance with a preferred embodiment of the present invention.

8 is a flow diagram illustrating the operation of a radio network controller (RNC) initially transmitting a service validity message in accordance with a preferred embodiment of the present invention.

9A and FIG. 10 are flowcharts illustrating operations of a terminal (UE) for determining service validity according to a preferred embodiment of the present invention.

11 is a flowchart illustrating the operation of a radio network controller (RNC) that periodically transmits a service validity message in accordance with a preferred embodiment of the present invention.

The present invention relates to a method for providing a multimedia broadcast / multicast service (hereinafter referred to as an MBMS service) in a mobile communication system. In particular, a service validity for an MBMS service in order to support mobility of a terminal is provided. Availability (hereinafter referred to as SA) relates to a method for transmitting and receiving information.

Due to the development of communication technology and increasing user demands, mobile communication systems using Code Division Multiple Access (CDMA) technology are not only used for voice services but also for circuit communication and packet communication. It is evolving toward supporting multimedia multicasting services that transmit data. In order to support multimedia multicasting communication, third generation standardization organizations provide a multimedia broadcast / multicast (MBMS) service that provides the same data from one data source to a plurality of user equipments (hereinafter referred to as UEs). Various criteria are provided to provide.

1 is a diagram illustrating a configuration of a mobile communication system for a typical MBMS service. Here, a configuration example in which MBMS service is applied to 3GPP (3rd Generation Project Partnership) system, which is a standard of 3G asynchronous mobile communication based on Global System for Mobile Communications (GSM) and General Packet Radio Services (GPRS), is illustrated.

Referring to FIG. 1, user terminals (UEs) 101, 102, 103, 104, 105, 106, 107, and 108 refer to devices capable of receiving MBMS data, and cells 111, 112, and 113. Refers to the cell area of the base station where the UEs 101 to 108 are located. Node B 121 is a base station for exchanging radio signals and wired signals according to the 3GPP standard, and provides MBMS to UEs 101 to 108 belonging to cells 111, 112, and 113.

A radio network controller (hereinafter referred to as RNC) 131 manages a plurality of Node Bs, and a plurality of Node Bs (not shown) supporting MBMS multimedia data with the Node B 121 and MBMS. To control the radio channels established between the Node Bs and the UEs. The RNC 131 and the Node B 121 constitute a UMTS Terrestrial Radio Access Network (hereinafter referred to as UTRAN), and the UTRAN forms UEs 101 to 108 as a core network. Called CN).

The Serving GPRS Support Node (SGSN) 141 controls the services of each of the MBMS subscribers. As a representative example, it manages service billing data of each subscriber and selectively provides multimedia data to a specific RNC. A Home Location Register (HLR) 151 is connected to the SGSN 141 to authenticate subscribers. The Gateway GPRS Support Node (GGSN) 161 provides MBMS data to be supplied to the UEs 101 to 108 through a broadcast / multicast service center (BM-SC) 181 and a border gateway (BG) 171. (Contents Provider) 191 and the Multicast Broadcast Sources (Multicast Broadcast Sources) (192, 193) is provided and transmitted to the SGSN 141, the management of the mobile situation of the UEs (101 to 108) and UEs (101 to 108) manages the quality of service for the MBMS serviced. The content provider 191 and the multicast / broadcasting sources 192 and 193 represent the source of MBMS data transmission.

The BG 171 receives MBMS data from the multicast broadcast source 192 in the network not currently managed by the service provider, and delivers the MBMS data to the GGSN 161. The BM-SC 181 receives the MBMS data from the content provider 191 and delivers it to the GGSN 161, and the authentication of the content provider 191, determination of the quality of service of the MBMS, error correction function for the loss of MBMS data, Performs functions such as content provider 191, and notifies UEs 101-108 which MBMS services are currently being serviced.

The MBMS data stream passes through the BM-SC 181 from the content provider 191, or through the BG 171 from the multicast broadcast source 192 of the external network, or the multicast broadcast source 193 of the internal network. ) And directly to the UEs 101-108 in the cells 111, 112, 113 through the Node B 121 under the control of the SGSN 141 and the RNC 131.

Although not shown, there may be multiple SGSNs and multiple RNCs connected to each SGSN for one MBMS service. The SGSN and the RNC perform selective data transmission to the RNC and the Node B, respectively, and store a list of nodes (List of RNC in SGSN, Node B in RNC) for data transfer.

FIG. 2 is a message flow diagram illustrating a typical multimedia broadcasting / multicast service procedure, in which a terminal 201 receiving an MBMS service and an RNC 211 for an MBMS service are described to explain a procedure in which an MBMS service is provided in a specific cell. ) And only the signal flow between SGSN 221 for MBMS service.

Referring to FIG. 2, in step 231, the SGSN 221 provides basic information about MBMS services to the terminal 201 through the RNC 211, for example, the MBMS services and the MBMS services. Announcement, etc. If there is a desired service among MBMS services recognized through the announcement process 231, the terminal 201 sends a SGSN 221 to the SGSN 221 through the RNC 211 to the desired MBMS service in step 241. Announce the joining. In the joining process 241, the terminal 201 notifies the SGSN 221 of an identifier of the MBMS service to be received by the terminal 201 and the terminal 201 after the SGSN 221 authenticates the terminal 201. ) Is informed whether or not the MBMS service can be received. The SGSN 221 stores a list and locations of terminals to receive a specific MBMS service through the join process 241.

When the BM-SC announces the start of the MBMS service joined by the terminal 201, in step 251, the SGSN 221 sends a session start message to the RNC 211 in which the terminal 201 is located. Send it. In step 252, the RNC 211 transmits an MBMS call message to the terminal 201 to notify that the MBMS service is started. Since the MBMS paging message is transmitted to a plurality of terminals joined to the MBMS service, the process 252 is referred to as group paging in a meaning that is different from the existing paging procedure.

In step 261, the terminal 201 transmits a notification response to the call. Through the transmission process 261, the RNC 211 determines the number of terminals to receive the MBMS service for each cell and determines the type of radio channel of the cell, that is, the service type. In this case, the RNC 211 provides an MBMS service through a common channel in a point-to-multipoint (hereinafter referred to as PtM) scheme if the number of terminals to receive the MBMS service is not smaller than a predetermined predetermined threshold. In this case, a radio resource control (RRC) connection is established for each terminal by a point-to-point (hereinafter referred to as PtP) scheme and a dedicated channel is provided to provide an MBMS service.

In step 271, the RNC 211 transmits MBMS RB (Radio Bearer) information to the terminal 201. The MBMS RB information includes radio channel information to be provided with MBMS service, for example, Orthogonal Variable Spreading Factor (OVSF) code information, transport format information, radio link control (RFC) information, Packet data collision control (PDCP) information and the like. In step 281, the terminal 201 receives the MBMS service according to the MBMS RB information.

MBMS RB information to be used when providing a specific MBMS service in a specific cell becomes valid for all UEs that want to receive the MBMS service in the cell. Therefore, the control signal related to the MBMS service is efficiently transmitted through the common control channel configured in the cell. In 3GPP, the MBMS control signal is periodically transmitted through a logical channel called an MBMS Control Channel (hereinafter referred to as MCCH).

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However, the plurality of cells in which the terminal may be located may or may not be able to provide a particular MBMS service according to an agreement with a service provider or availability of radio resources. However, the terminal cannot know whether the MBMS service that it wants to receive is available in the cell where it is located or whether the resources for providing the MBMS service are valid. Therefore, there is a problem of generating unnecessary signaling overhead and increasing service delay time by establishing an RRC connection and performing a procedure for requesting an MBMS service for an MBMS service that a terminal cannot provide or lack of resources.

Accordingly, the present invention, which was devised to solve the problems of the prior art operating as described above, provides a service availability and resource for the validity of MBMS service in each cell in a mobile communication system that provides a multimedia broadcasting / multicast (MBMS) service. It provides a method for notifying the terminal of the availability informations.

In the present invention, a mobile communication system that provides a multimedia broadcasting / multicast (MBMS) service requests a MBMS service or other service after recognizing that the terminal enters a cell in which the MBMS service is not available or the resource for the MBMS service is insufficient. Provides a method for selecting a cell.

The present invention provides a current service because the MBMS service is NSA (Not Service Availability) or SA (Service Availability) or SA in each cell in a mobile communication system providing a multimedia broadcasting / multicast (MBMS) service. A method of notifying a terminal of service validity information indicating whether an out of service area (OSA) is provided is provided.

A preferred embodiment of the present invention devised to achieve the above object is a mobile including a wireless network controller for controlling a multimedia broadcasting / multicast service (hereinafter referred to as MBMS service) of terminals located in a plurality of cells. In a communication system, a method for transmitting service validity information for the MBMS service from the radio network controller to the terminals,
Determining whether a specific MBMS service is valid for each of the plurality of cells and whether there is sufficient resources to provide the MBMS service;
A call message including service validity information indicating whether the specific MBMS service is valid and resource validity information indicating whether the MBMS service has valid resources and to terminals located in the cells among the plurality of cells. Transferring the process,

The resources for at least one MBMS service valid in a corresponding cell, to terminals located in the plurality of cells.
And transmitting a service validity message including information.

Another embodiment of the present invention, in a mobile communication system including a wireless network controller for controlling a multimedia broadcasting / multicast service (hereinafter referred to as MBMS service) of terminals located in a plurality of cells, to receive the MBMS service A method for a terminal to receive service validity information for the MBMS service from the wireless network controller,

Service validity information indicating whether the corresponding MBMS service is valid and resource validity information indicating whether sufficient resources for the corresponding MBMS service are sufficient for at least one MBMS service valid in the cell where the terminal is currently located from the radio network controller. Receiving a service validity message,
Determining, according to the service validity message, whether a desired MBMS service is valid in a cell in which the terminal is currently located and whether sufficient resources for the desired MBMS service are sufficient;

And if the desired MBMS service is valid and resources for the desired MBMS service are sufficient, receiving the desired MBMS service in the cell in which the cell is currently located.

Hereinafter, with reference to the accompanying drawings will be described in detail the operating principle of the preferred embodiment of the present invention. In the following description of the present invention, detailed descriptions of well-known functions or configurations will be omitted if it is determined that the detailed description of the present invention may unnecessarily obscure the subject matter of the present invention. Terms to be described later are terms defined in consideration of functions in the present invention, and may be changed according to intentions or customs of users or operators. Therefore, the definition should be made based on the contents throughout the specification.

The present invention described below is MBMS periodically transmitted through the MCCH to transmit information on the service validity from the radio network controller (RNC) to the terminal (UE) in a mobile communication system providing a multimedia broadcasting / multicast (MBMS) service Use control messages.

The states for MBMS services in the destination cell to which the terminal enters or the cell in which communication is initially started are defined in three ways as follows. Firstly, the MBMS service that cannot be supported by the cell is Non Service Availability (NSA), and secondly, the MBMS service that can be supported by the cell but cannot be temporarily provided due to lack of resources at the present time is OSA Third, the MBMS service that can be currently provided by the cell is a case of Service Availability (SA).
If a specific MBMS service is NSA or OSA in a specific cell, the terminal does not perform RRC connection establishment for the request of the MBMS service. If the MBMS service is an NSA, the cell cannot provide an MBMS service, so a procedure for calling an MBMS is not necessary. However, if the MBMS service is an OSA, the cell may access the MBMS service when resources are later available. Because it can provide, a procedure for calling MBMS is necessary. If the MBMS service is SA in the cell, the cell is providing the MBMS service in a PtP or PtM scheme or is not providing the MBMS service due to the absence of a terminal that has requested the MBMS service. The MBMS service can be started immediately. As described above, the information indicating whether the MBMS service is SA, NSA, or OSA in a specific cell is included in a control message transmitted through MCCH when the MBMS service is started or while the MBMS service is being serviced.
3A and 3B illustrate control messages transmitted through MCCH to support mobility of a terminal during MBMS service. The following control messages support the MBMS service of a terminal in PMM (ID) and PMM CONNECTED modes.
3A illustrates the transmission of an MBMS service validity message 301. The MBMS service validity message 301 is used to notify a terminal from a wireless network controller of validity information of a corresponding MBMS service during an MBMS service. The MBMS service validity message 301 transmitted in a specific cell includes validity information for each of at least one MBMS service valid in the cell. The validity information includes an MBMS service identifier and a service type.
FIG. 3B illustrates the transmission of the MBMS REAR BEARER INFORMATION message 302. The MBMS RB bearer information message 302 is an MBMS traffic channel (MBMS) in which a radio network controller carries MBMS data to a terminal. Radio bearer (hereinafter referred to as RB) information for a Traffic Channel (hereinafter referred to as MTCH) is informed. When the MBMS service is serviced by PtP, since the RB is set for each terminal, it is impossible to inform the RB information for each terminal through the MCCH. Therefore, the RB information of the MBMS radio bearer information message 302 is valid only for an MBMS service serviced by PtM. The MBMS radio bearer information includes an MBMS service identifier, information on a logical channel, a transport channel, and a physical channel.
4 illustrates an example of a mobile terminal receiving a multimedia broadcast / multicast service, wherein reference numerals 401 and 402 denote cells, and reference numeral 411 denotes a cell 1 (401) to a cell 2 (402) receiving MBMS C. Indicates the terminal that is moving. Here, cell 1 401 supports MBMS C, but cell 2 402 may not support MBMS C, or may support MBMS C but does not have sufficient resources for MBMS C. MBMS C is therefore SA in cell 1 401 and NSA or OSA in cell 2 402. When the terminal 411 learns that the MBMS C is NSA or OSA in the cell 2 402, the terminal 411 performs cell reselection to the cell capable of the MBMS C without performing unnecessary RB connection and service request or the cell 2 ( 402, and so on. The operation of terminal 411 in cell 2 402, which is an NSA, depends on the configuration of the system or the user's request.

5 is a message flow diagram illustrating an operation of notifying a terminal through MCCH of information on the validity of an MBMS service according to an exemplary embodiment of the present invention. Here, reference numerals 501 and 502 denote terminals receiving MBMS service, and 511 denotes an RNC controlling radio connection of the terminals 501 and 502 for MBMS service, and reference numeral 521 denotes the RNC 511. Represents SGSN. The terminals 501 and 502 join the same single MBMS service, but the terminal UE # 1 501 is located in a cell which is SA or OSA, and the terminal UE # M 502 is located in a cell which is an NSA. have.

Referring to FIG. 5, in step 531, the RNC 511 receives a session start message for a specific MBMS service from the SGSN 521. Since the session start message includes parameters such as MBMS service identifier and quality of service (QoS), the RNC 511 refers to the parameters in step 514 so that the RNC 511 may refer to the parameters. For each of the cells to manage, it is determined whether the MBMS service is NSA, SA, or OSA. Here, the lack of resources for the MBMS service can be determined by checking whether an OVSF code that can satisfy the QoS of the session start message is currently available.

In step 551, the RNC 511 transmits an MBMS call message for the MBMS service to the terminal 501 through a call channel associated with MBMS services. The MBMS paging message indicates that an event such as a session start for the MBMS service has occurred. An MBMS service identifier, a cause value, an NSA / SA indicator, a resource availability indicator, and parameters required for effective terminal counting And the like. The coarse value is set to a value indicating that the MBMS call message has occurred due to the thin start message. Additionally, parameters necessary for terminal counting may be further included as an optional value (hereinafter referred to as OP) or a conditional value (CV). The value of the NSA / SA indicator and the resource availability indicator is set according to the resource and service state of cells in which the MBMS call message is transmitted, indicating whether the cells are SA, NSA, or OSA. Here SA may be considered to include OSA.

 The MBMS paging message may be transmitted even while an MBMS service is in progress and has corresponding parameters according to a service event and a type of MBMS control message to be received.

If the MBMS service is OSA in a particular cell, the MBMS call message sent to the cell includes only an MBMS service identifier, a Cause value, an NSA / SA indicator, and a resource availability indicator. On the other hand, if the MBMS service is an SA, the MBMS call message includes all the aforementioned parameters.

Terminals located in cells where the MBMS service is an SA or OSA perform operations according to the MBMS service identifier and the coarse value included in the MBMS call message, and their connection state.
If the desired MBMS service is NSA and cell reselection is possible, the terminal reselects and moves another cell capable of the desired MBMS service, and if the cell reselection is not possible and there is no other desired MBMS service, the terminal stays in the current cell. Abandon the reception of the service.

If the desired MBMS service is OSA and cell reselection is possible, the terminal reselects and moves to another cell capable of the desired MBMS service, and if cell reselection is not possible, when resources are available while monitoring the MCCH in the current cell. Wait until In other cases, the terminal may give up the MBMS service in the current cell at the request of the user. The terminal may know whether the resource is available by receiving the MBMS call message or additionally receiving the MBMS service validity message transmitted through the MCCH according to the scheduling, that is, whether the desired MBMS service in the current cell has become an SA.

As a specific example, the terminal UE # 1 (501) in the idle mode located in the cell where the MBMS service is SA may send an RRC connection setup request message for receiving the MBMS service in response to the MBMS call message. It transmits to the RNC 511 through uplink. The RNC 511 counts terminals to receive the MBMS service in a specific cell in step 561 if the counting of the number of effective terminals is necessary and the service type for the MBMS service and the service according to the counted value. Determine the RB information according to the type. In step 562, the RNC 511 informs the terminal 501 by putting the determined RB information in an RB setting message. When the RB setting procedure according to the RB information is completed, the terminal 501 can receive the MBMS service in step 563.

After the MBMS service is started, in step 571, the RNC 511 services information about NSA, OSA, and SA of the MBMS service to support mobility of terminals moving between cells while receiving the MBMS service. The message is periodically transmitted through the MCCH. The service validity message includes an MBMS service identifier, resource availability information, a current service type, and mapping information of an MBMS Radio Network Temporary Identifier (mRNTI) to the MBMS service identifier.

Not being able to find the service identifier of the desired MBMS service in the service validity message means that the MBMS service cannot be received in the current cell (NSA). The terminal may also read resource availability information and determine whether the desired MBMS service is OSA or SA. If the MBMS service is an SA, information on a service type of the MBMS service is included. The service type information indicates whether the MBMS service is serviced in the PtP type, the PtM type in the current cell, or whether the terminal requesting the MBMS service does not exist in the cell (no UE).

If the PtM type, the terminal finds the RB information from the radio bearer information message transmitted through the MCCH and receives the MBMS service through the MTCH according to the RB information. If the PtP type, the terminal establishes an RRC connection and requests the MBMS service. On the other hand, if there is no UE, the UE establishes an RRC connection to request the MBMS service or to perform another designated operation. If the operation performed by the terminal in the case of the PtP type and the case of no UE is the same, the amount of information transmitted may be reduced by replacing the service type information with the PtM indicator.

As described above, a terminal entering a specific cell may know whether a desired MBMS service is NSA, OSA, or SA based on a service validity message transmitted from the cell, and in the case of SA, a service type of the current MBMS service. It can be seen. If the NSA, the terminal reselects another cell capable of the MBMS service or abandons the MBMS reception in the current cell. If it is OSA, it checks the resource availability by reselecting another cell capable of the MBMS service or periodically receiving the MCCH until the resource becomes available in the current cell. If SA, the terminals each take appropriate action by the service type.

6 illustrates a format of a service validity message transmitted through MCCH according to a preferred embodiment of the present invention. As shown, the service validity information includes a message type and at least one message information element (IE) corresponding to an MBMS service that is SA or OSA.

Referring to FIG. 6, the message information element includes MBMS service identifier, resource availability information, service type, and mapping information of mRNTI to the MBMS service identifier. The service type may indicate no UE, PtP and PtM, or may be a PtM indicator. The current service type may be a conditional value (CV) included only when a resource is available, and the mapping information may be a conditional value (CV) included only when the service type is PtP or PtM. The resource availability information may be 1 bit indicating whether or not there is a resource available, or may be content about resource availability. A detailed description of the resource availability information will be described later.

7 and 8 are flowcharts illustrating an operation of a radio network controller (RNC) for transmitting an MBMS call message and a service validity message according to a preferred embodiment of the present invention.

Referring to FIG. 7, when a session start message for a specific MBMS service is received from SGSN in step 601, the RNC determines whether the MBMS service is an SA for the managed cell in step 611. Here, the RNC determines whether the MBMS service is allowed in the cell according to the parameters included in the session message, not whether the resource for the MBMS service is available in the cell.

If the MBMS service is not an SA, the RNC proceeds to step 612 to set a service identifier of the MBMS service in a MBMS paging message, set a Cause value indicating that the session is started, and indicate whether or not it is valid. After setting the NSA / SA indicator to the NSA, the MBMS call message is transmitted in step 624. In another modified embodiment, the RNC does not send an MBMS call message to cells in which a particular MBMS service is an NSA. If the MBMS service is an SA, in step 621, the RNC checks whether there are enough resources for the MBMS service in the cell. Here, the RNC determines whether the resource has sufficient resources to support QoS of the MBMS service according to the QoS parameter of the MBMS service included in the session start message.

If there are not enough resources for the MBMS service, the RNC proceeds to step 622 to set a service identifier of the MBMS service in the MBMS call message and set a Cause value indicating that the session is started, and NSA / Set the SA indicator to SA and the resource availability indicator to false. This means that the MBMS service is OSA.

On the other hand, if there are enough resources for the MBMS service, the RNC proceeds to step 623 to set the service ID of the MBMS service in the MBMS call message and set a coarse value indicating that the session is started, and the NSA / SA indicator to SA. , Set the resource availability indicator to true. If it is determined that it is necessary to count the number of terminals requesting the MBMS service, the MBMS call message includes parameter values for counting the number of terminals for which the MBMS service is desired. In step 624, the MBMS call message set in step 622 or step 623 is transmitted.
FIG. 8 shows transmission of a service validity message initially transmitted following the procedure of FIG. 7.

Referring to FIG. 8, in step 631, the RNC determines whether a specific MBMS service is an NSA in a cell managed by the RNC, and if so, terminates the operation and does not transmit any message related to the MBMS service in the cell. On the other hand, if not the NSA, the RNC proceeds to step 632 to determine whether the cell has resources that can satisfy the QoS of the MBMS service. If the cell does not have enough resources, go to Step 671. Although not shown, to indicate that the cell does not have sufficient resources, the service identifier of the MBMS service is set in the MBMS service validity message for transmission to the terminal, and the resource validity information is set to false. MRNTI mapping information for the MBMS service identifier may be set.

If the cell has sufficient resources in step 632, the RNC determines in step 633 if the number of terminals in RRC connected mode is large enough to provide MBMS service in PtM mode. This is determined by checking whether the number of terminals in the RRC connected mode is not smaller than a predetermined threshold value according to the number of terminals counted in the service initialization process. If the number of terminals in the RRC connected mode is not smaller than the threshold, go to step 661. On the other hand, if small, in step 634, the RNC counts the number of terminals that are in the connected mode and want to receive the MBMS service to determine the RB type of the cell.

 In step 641, the RNC determines whether the counting value is zero. If 0, the process proceeds to step 642 and the service validity message includes the service identifier of the MBMS service, mRNTI mapping information, resource availability information set to true, and service type information set to no terminal.

If the counting value is not 0, in step 651, the RNC determines whether the counting value is smaller than a threshold for serving the MBMS with PtM. If the counting value is less than the threshold, the process proceeds to step 652 where the RNC determines the RB type for the MBMS service as PtP and determines the RB information of the PtP type. At this time, the service validity message includes a service identifier of the MBMS service, mRNTI mapping information, resource validity information set to true, and service type information set to PtP. If the counting value is not less than the threshold, go to step 661. In step 661, the RNC sets the RB type for the MBMS service to PtM and determines RB information of the PtM type. In this case, the service validity message includes a service identifier of the MBMS service, mRNTI mapping information, resource validity information set to true, and service type information set to PtM.

The service validity message set in the processes 632, 642, 652, and 661 is transmitted on the MCCH in process 671. Although not shown, the PtM RB information determined in the procedure 661 is transmitted in the radio bearer information message through the MCCH, and the PtP RB information determined in the processes 642 and 652 is carried in the radio bearer information message through the control channel. Is sent.

9A and 9B are flowcharts illustrating an operation of a terminal receiving a service validity message according to a preferred embodiment of the present invention. Here, an operation flow performed when the mobile terminal reselects a cell is illustrated. That is, the operations shown in FIGS. 9A and 9B are performed every time the cell is reselected regardless of the start of the session.

9A and 9B, in step 701, the terminal reads system information transmitted through a BCCH (Broadcasting Control Channel) of the cell as it enters a specific cell through cell reselection. In step 711, the terminal determines whether the information about the MCCH configuration is included in the system information. If the information on the MCCH configuration is not included in the system information, in step 713, the terminal does not support the MBMS service itself (all MBMS services) (Non MBMS service Area: NMA) I judge it. Therefore, another cell supported by the MBMS service is searched for and reselected, or the reception of the MBMS service is abandoned. At this time, the terminal does not request the desired MBMS service or monitor the call channel associated with the MBMS services by establishing an RRC connection to prevent unnecessary power consumption.

On the other hand, if the MCCH configuration information is found through the system information, in step 712, the UE connects an MCCH using the MCCH configuration information and transmits an MBMS radio bearer information message and / or MBMS service validity message through the MCCH. Receive. In step 713, the terminal checks whether the MBMS radio bearer information message includes the identifier of the MBMS service to be received by the terminal. If the identifier of the MBMS service is included, the process proceeds to step 714 where the terminal receives the data of the MBMS service through the MTCH.

If the MBMS radio bearer information message does not include the identifier of the MBMS service, in step 721, the terminal checks whether the service validity message includes the identifier of the MBMS service to be received by the terminal. If the service identifier of the MBMS service is not included, the process proceeds to step 722 to update a Routing Area (RA) as necessary. A detailed description of the process 722 is shown in FIG.

On the other hand, if the service validity message includes the identifier of the MBMS service, in step 731 the terminal checks the resource availability information included in the service validity message. If the resource availability information is false, in step 732, the terminal determines that the MBMS service is OSA in the cell. The terminal then reselects another cell capable of the MBMS service or stays in the cell waiting for the MBMS service to become available. At this time, the terminal monitors call channels related to MBMS services to confirm whether the MBMS service is enabled.
On the other hand, if the resource availability information is true, in step 741, the terminal determines whether the service type included in the service validity message is no UE.

 If the service type is no UE, an operation according to the current state of the terminal is performed in step 742. The process 742 is described in more detail as follows. In the idle mode, the terminal enters the connected mode by performing an RRC connection establishment procedure. In the connection mode, the operation of the terminal is as follows. If the CELL_FACH or CELL_PCH state monitors a forward access channel (FACH) or a paging channel (PCH), the terminal may receive a cell update confirmation message or a radio bearer setup message from the RNC. Wait to obtain PtP radio bearer information by the cell update confirmation message or the radio bearer setup message. If the URA_PCH state performs the cell update less frequently than in the case of the CELL_PCH state, the terminal performs the cell update procedure and the PtP radio bearer by the cell update confirmation message or the radio bearer setup message received from the RNC by the cell update procedure. Obtain information. Lastly, if the CELL_DCH state monitors a dedicated channel (DCH), the terminal performs a handover procedure and receives PtP radio bearer information through a dedicated control channel during the handover procedure.

However, if the service type information is no UE in step 741, the terminal determines whether the service type information is PtP in step 751. If the current service type information is PtP, the process proceeds to step 752 and an operation according to the current state of the terminal is performed. The process 752 will be described in more detail as follows. In the idle mode, the terminal enters the connected mode by performing an RRC connection establishment procedure. In the connection mode, the operation of the terminal is as follows. If the CELL_FACH or CELL_PCH state, the terminal obtains the PtP radio bearer information by the cell update confirmation message or the radio bearer setup message received from the RNC. In the URA_PCH state, the terminal performs a cell update procedure and acquires PtP radio bearer information by a cell update confirmation message or a radio bearer setup message received by the cell update procedure. Finally, if the CELL_DCH state, the terminal receives the PtP radio bearer information by handover.

In step 753, the terminal receives data of the MBMS service through a dedicated traffic channel (DTCH) using the PtP radio bearer information obtained in step 742 or 752.

If the service type information is not PtP, the terminal determines whether the service type information is PtM in step 761. If neither PtM is determined to be an error, the operation ends. If the service type information is PtM, in step 762, the UE receives a radio bearer information message including PtM radio bearer information through an MCCH and is activated by the PtM radio bearer information in step 763. Receive the MBMS service through MTCH.

10 is a flowchart illustrating a case of performing RA update in a terminal according to an embodiment of the present invention.

Referring to FIG. 10, if the desired MBMS service is not valid (NSA), the terminal determines whether a routing area (RA) update is necessary as in step 771. The determination may be made depending on whether the current cell is included in a different routing area than the previous cell. If the RA update is not necessary, in step 773, the UE finds and reselects another cell supporting the MBMS service or stays in the current cell. Here, the terminal periodically monitors the call channels related to the MBMS services to check whether the desired MBMS service starts in the current cell.

On the other hand, if the RA update is necessary, the terminal transmits the RA update request message to the RNC in step 772 and waits for the reception of the RA update confirmation message from the RNC. In step 781, the terminal checks whether MBMS service information is included in the RA update confirmation message received from the RNC. In this case, the MBMS service information may include all information included in the aforementioned MBMS service validity message and MBMS radio bearer information message, that is, service identifier, service type, PtP radio bearer information, etc. for MBMS services which are SAs. have.

If the RA update confirmation message includes the MBMS service information, in step 782, the terminal determines whether the MBMS service to be received is SA, NSA, or OSA according to the MBMS service information read from the RA update confirmation message. Judge. If the MBMS service to be received is NSA or OSA, the terminal performs a corresponding operation. If the MBMS service to be received is an SA, the terminal sets a PtP RB according to the PtP RB information included in the RA update confirmation message and receives the MBMS service.

On the other hand, if the MBMS service information is not included in the RA update confirmation message, in step 783, the terminal determines whether the MBMS service is SA, NSA, or OSA according to the first service validity message received after the RA update confirmation message. To judge. That is, if the MBMS service is NSA or OSA, the terminal performs a corresponding operation. If the MBMS service is an SA, the terminal requests the MBMS service. If a radio bearer setup message including PtP RB information for the MBMS service is received before the process 783, the terminal receives the MBMS service according to the PtP RB information.

Meanwhile, when the service validity message received after the routing area update of FIG. 10 is not included in the service identifier of the desired MBMS service, the terminal determines that it is not necessary to perform the routing area update again. This is to prevent unnecessary routing area updates from being repeatedly performed.

11 is a flowchart illustrating an operation of a radio network controller (RNC) for periodically transmitting a service validity message during an MBMS service according to a preferred embodiment of the present invention.

Referring to FIG. 11, in step 801, the RNC checks whether a specific MBMS service is an NSA in a managed cell. If the MBMS service is the NSA at 801, the process proceeds to step 851. If the MBMS service is not an NSA in step 801, then in step 811 the RNC checks whether the cell has sufficient resources for the MBMS service. If there are not enough resources for the MBMS service, the service validity message in step 812 includes the service ID and mRNTI of the MBMS service and resource availability information set to false. If the resource for the MBMS service is sufficient, in step 821, the RNC checks whether there is no terminal to receive the MBMS service in the cell. If there is no terminal to receive the MBMS service, in step 822, the service validity message includes service ID and mRNTI mapping information of the MBMS service, resource availability information set to true, and service type information set to no UE. Include. If there is at least one terminal to receive the MBMS service, in step 831, the RNC checks whether the service type of the MBMS service is PtP according to the number of terminals to receive the MBMS service. If the service type is PtP, the service validity message in step 832 includes service ID and mRNTI mapping information of the MBMS service, resource availability information set to true, and service type information set to PtP. If the service type is not PtP, in step 841, the RNC includes a service ID and mRNTI mapping information of the MBMS service, resource availability information set to true, and a service type set to PtM in a service validity message.
If the service validity message is configured as described above, the RNC confirms through step 851 whether validity information of all available MBMS services in the cell is set. This is because the service validity message includes as many service validity information as the number of available services in the cell. If service validity information is set for all available MBMS services in the cell in step 851, the RNC transmits the service validity message in step 861.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by those equivalent to the scope of the claims.

In the present invention operating as described in detail above, the effects obtained by the representative ones of the disclosed inventions will be briefly described as follows.

According to the present invention, in a mobile communication system providing a multimedia broadcasting / multicast service, it is possible to know whether a terminal can service a desired MBMS service in a current cell and has sufficient resources by using control messages received through an MCCH. In addition, it is possible not only to improve the continuity of receiving MBMS service when the terminals using the MBMS service move, but also to allow the terminals to selectively perform RRC setup only when the desired MBMS service is available in the current cell, thereby signaling over unnecessary RRC connection setup. The head can be reduced.

Claims (90)

In a mobile communication system including a wireless network controller for controlling a multimedia broadcasting / multicast service (hereinafter referred to as MBMS service) of terminals located in a plurality of cells, a service for the MBMS service from the wireless network controller to the terminals In the method of transmitting the validity information, Determining whether a specific MBMS service is valid for each of the plurality of cells and whether there is sufficient resources to provide the MBMS service; Transmitting a call message including service validity information and resource validity information to terminals located in cells where the MBMS service is available among the plurality of cells; And transmitting a service validity message including the resource validity information on at least one MBMS service valid in a corresponding cell to terminals located in the plurality of cells. The method of claim 1, wherein the service validity message, And the service type information of a corresponding MBMS service when the resource validity information is true. delete The method as claimed in claim 2, wherein the service type information indicates whether the corresponding MBMS service is in point-to-point mode (PtP), point-to-multimode (PtM), or no UE. delete The method of claim 1, wherein the service validity message, Wherein the at least one MBMS service is periodically transmitted through an MBMS control channel. The method of claim 1, wherein the call message, When the service validity information is true and the resource validity information is true, further comprising session start indication information indicating that the specific MBMS service is started and counting parameters for counting terminals to receive the specific terminals. The method. delete delete delete delete In a mobile communication system including a wireless network controller for controlling a multimedia broadcasting / multicast service (hereinafter referred to as MBMS service) of the terminals located in a plurality of cells, the terminal to receive the MBMS service from the wireless network controller In the method for receiving service validity information for the MBMS service, Receiving, from the radio network controller, a service validity message including service validity information and resource validity information for at least one MBMS service valid in a cell in which the terminal is currently located; Determining, according to the service validity message, whether a desired MBMS service is valid in a cell in which the terminal is currently located and whether sufficient resources for the desired MBMS service are sufficient; And if the desired MBMS service is valid and there are enough resources for the desired MBMS service, receiving the desired MBMS service in the currently located cell. The method of claim 12, wherein the service validity message, And the service type information of a corresponding MBMS service when the resource validity information is true. The method as claimed in claim 13, wherein the service type information indicates whether the corresponding MBMS service is in point-to-point mode (PtP), point-to-multimode (PtM), or no UE. The method of claim 13, wherein receiving the desired MBMS service comprises: Determining whether the service validity message includes a service identifier of the desired MBMS service; Checking the resource validity information of the desired MBMS service if the service validity message includes a service identifier of the desired MBMS service; And if the resource validity information is true, receiving the desired MBMS service according to the service type information of the desired MBMS service. delete delete The method of claim 15, wherein receiving the desired MBMS service comprises: If the service validity message does not include a service identifier of the desired MBMS service, moving to another cell capable of the desired MBMS service; If the resource validity information is false, moving to another cell where the desired MBMS service is available. The method of claim 18, wherein receiving the desired MBMS service comprises: And if the service validity message does not include a service identifier of the desired MBMS service, performing a routing area update. The method of claim 19, wherein the performing of the routing area update comprises: Determining whether the routing area update is necessary; If the routing area update is not needed, moving to another cell capable of providing the desired MBMS service or waiting for resources of the desired MBMS service to become available in the current cell; Requesting a routing area update and receiving a routing area update confirmation message from the wireless network controller if the routing area update is necessary; Confirming whether the routing area update confirmation message includes service information on at least one MBMS service valid in a cell in which the terminal is currently located; If the service information is not included in the routing area update confirmation message, determining whether the desired MBMS service is valid according to a service validity message received after performing the routing area update. Way. The method of claim 20, wherein the performing of the routing area update comprises: If it is determined that the desired MBMS service is valid according to the service information included in the routing area update confirmation message, receiving the desired MBMS service according to PtP radio bearer information for the desired MBMS service included in the service information. Wow, And if it is determined that the desired MBMS service is not valid according to the service information, reselecting another cell capable of providing the desired MBMS service. The method of claim 12, wherein the service validity message, And receiving periodically through an MBMS control channel while the at least one MBMS service is effective in a cell in which the terminal is currently located. 16. The method of claim 15, wherein if the service type information indicates a PtM mode, the UE receives PtM radio bearer information for the desired MBMS service through an MBMS control channel and performs the desired MBMS service through a common channel according to the PtM radio bearer information. Receiving; If the service type information indicates a PtP mode or no UE, acquiring PtP radio bearer information for the desired MBMS service and receiving the desired MBMS service through a dedicated channel according to the PtP radio bearer information; Said method comprising a. The method of claim 11, wherein receiving the desired MBMS service through the dedicated channel comprises: And if the terminal is in an idle mode, performing a radio connection setting procedure with the radio network controller and obtaining the PtP radio bearer information through the radio connection. The method of claim 11, wherein receiving the desired MBMS service through the dedicated channel comprises: If the terminal is in a CELL_FACH or CELL_PCH state, the PtP radio bearer information is obtained by a cell update confirmation message or a radio bearer setup message received from the radio network controller; If the terminal is in the URA_PCH state, perform a cell update procedure with the radio network controller to obtain the PtP radio bearer information according to a cell update confirmation message received from the radio network controller; And if the terminal is in the CELL_DCH state, performs the handover procedure with the radio network controller to receive the PtP radio bearer information from the radio network controller through a dedicated control channel. The method of claim 21, wherein the performing of the routing area update comprises: If it is determined that the desired MBMS service is valid according to the received service validity message after receiving the routing area update confirmation message, requesting the desired MBMS service from the wireless network controller; If it is determined that the desired MBMS service is not valid according to the received service validity message after receiving the routing area update confirmation message, moving to another cell capable of providing the desired MBMS service; If a radio bearer setup message including PtP radio bearer information of the desired MBMS service is received after receiving the routing area update confirmation message, receiving the desired MBMS service according to the PtP radio bearer information; Characterized in that the method. The method of claim 21, wherein the performing of the routing area update comprises: If it is determined that the desired MBMS service is valid according to the service validity message received after the routing area update confirmation message, requesting the desired MBMS service from the wireless network controller; If it is determined that the desired MBMS service is not valid according to the service validity message received after the routing area update confirmation message, terminating the desired MBMS service; Receiving a desired MBMS service according to the PtP radio bearer information when a radio bearer setup message including PtP radio bearer information of the desired MBMS service is received after the routing area update confirmation message; The method. The method of claim 20, wherein the performing of the routing area update comprises: If it is determined that the desired MBMS service is valid according to service information included in the routing area update confirmation message, receiving the desired MBMS service according to PtP radio bearer information of the MBMS service included in the service information; And waiting for the desired MBMS service to be valid for the service. The method of claim 28, wherein performing the routing area update comprises: If it is determined that the desired MBMS service is valid according to the received service validity message after receiving the routing area update confirmation message, requesting the desired MBMS service from the wireless network controller; If it is determined that the desired MBMS service is not valid according to the received service validity message after receiving the routing area update confirmation message, moving to another cell capable of providing the desired MBMS service; If a radio bearer setup message including PtP radio bearer information of the desired MBMS service is received after receiving the routing area update confirmation message, receiving the desired MBMS service according to the PtP radio bearer information; Characterized in that the method. The method of claim 28, wherein performing the routing area update comprises: If it is determined that the desired MBMS service is valid according to the service validity message received after the routing area update confirmation message, requesting the desired MBMS service from the wireless network controller; If it is determined that the desired MBMS service is not valid according to the service validity message received after the routing area update confirmation message, terminating the desired MBMS service; Receiving a desired MBMS service according to the PtP radio bearer information when a radio bearer setup message including PtP radio bearer information of the desired MBMS service is received after the routing area update confirmation message; The method. The method of claim 19, wherein the performing of the routing area update comprises: Determining whether the routing area update is necessary; If the routing area update is not needed, waiting for resources to be available for the desired MBMS service in the current cell; If the routing area update is required, requesting a routing update from the RNC to receive a routing area update confirmation message; Determining whether the routing region update confirmation message includes information on at least one MBMS service in a cell; If the routing area update confirmation message does not include the service information, determining whether the desired MBMS service is valid according to the service validity message received by the desired MBMS service after the routing area update. The method. 32. The method of claim 31, wherein performing the routing area update comprises: If it is determined that the desired MBMS service is valid according to the received service validity message after receiving the routing area update confirmation message, requesting the desired MBMS service from the wireless network controller; If it is determined that the desired MBMS service is not valid according to the received service validity message after receiving the routing area update confirmation message, moving to another cell capable of providing the desired MBMS service; If a radio bearer setup message including PtP radio bearer information of the desired MBMS service is received after receiving the routing area update confirmation message, receiving the desired MBMS service according to the PtP radio bearer information; Characterized in that the method. 33. The method of claim 32, wherein performing the routing area update comprises: If it is determined that the desired MBMS service is valid according to the service information included in the routing area update confirmation message, receiving the desired MBMS service according to PtP radio bearer information for the desired MBMS service included in the service information. Wow, And if it is determined that the desired MBMS service is not valid according to the service information, reselecting another cell capable of providing the desired MBMS service. 33. The method of claim 32, wherein performing the routing area update comprises: If it is determined that the desired MBMS service is valid according to the service validity message received after the routing area update confirmation message, requesting the desired MBMS service from the wireless network controller; If it is determined that the desired MBMS service is not valid according to the service validity message received after the routing area update confirmation message, terminating the desired MBMS service; Receiving a desired MBMS service according to the PtP radio bearer information when a radio bearer setup message including PtP radio bearer information of the desired MBMS service is received after the routing area update confirmation message; The method. 32. The method of claim 31, wherein performing the routing area update comprises: If it is determined that the desired MBMS service is valid according to service information included in the routing area update confirmation message, receiving the desired MBMS service according to PtP radio bearer information of the MBMS service included in the service information; And waiting for the desired MBMS service to be valid for the service. 36. The method of claim 35, wherein performing the routing area update comprises: If it is determined that the desired MBMS service is valid according to the received service validity message after receiving the routing area update confirmation message, requesting the desired MBMS service from the wireless network controller; If it is determined that the desired MBMS service is not valid according to the received service validity message after receiving the routing area update confirmation message, moving to another cell capable of providing the desired MBMS service; If a radio bearer setup message including PtP radio bearer information of the desired MBMS service is received after receiving the routing area update confirmation message, receiving the desired MBMS service according to the PtP radio bearer information; Characterized in that the method. 36. The method of claim 35, wherein performing the routing area update comprises: If it is determined that the desired MBMS service is valid according to the service validity message received after the routing area update confirmation message, requesting the desired MBMS service from the wireless network controller; If it is determined that the desired MBMS service is not valid according to the service validity message received after the routing area update confirmation message, terminating the desired MBMS service; Receiving a desired MBMS service according to the PtP radio bearer information when a radio bearer setup message including PtP radio bearer information of the desired MBMS service is received after the routing area update confirmation message; The method. The method of claim 28, wherein the waiting step, And periodically monitoring a call channel related to MBMS services in the current cell. The method of claim 15, Receiving the desired MBMS service, Abandoning reception of the desired MBMS service if the service validity message does not include the service identifier of the desired MBMS service; If the resource validity information is false, moving to another cell capable of providing the desired MBMS service. 40. The method of claim 39, wherein receiving the desired MBMS service comprises: And if the service validity message does not include a service identifier of the desired MBMS service, performing a routing area update. 41. The method of claim 40, wherein performing the routing area update comprises: Determining whether the routing area update is necessary; If the routing area update is not needed, moving to another cell capable of providing the desired MBMS service or waiting for resources of the desired MBMS service to become available in the current cell; Requesting a routing area update and receiving a routing area update confirmation message from the wireless network controller if the routing area update is necessary; Confirming whether the routing area update confirmation message includes service information on at least one MBMS service valid in a cell in which the terminal is currently located; If the service information is not included in the routing area update confirmation message, determining whether the desired MBMS service is valid according to a service validity message received after performing the routing area update. Way. 42. The method of claim 41, wherein performing the routing area update comprises: If it is determined that the desired MBMS service is valid according to the service information included in the routing area update confirmation message, receiving the desired MBMS service according to PtP radio bearer information for the desired MBMS service included in the service information. Wow, And if it is determined that the desired MBMS service is not valid according to the service information, reselecting another cell capable of providing the desired MBMS service. 43. The method of claim 42, wherein performing the routing area update comprises: If it is determined that the desired MBMS service is valid according to the received service validity message after receiving the routing area update confirmation message, requesting the desired MBMS service from the wireless network controller; If it is determined that the desired MBMS service is not valid according to the received service validity message after receiving the routing area update confirmation message, moving to another cell capable of providing the desired MBMS service; If a radio bearer setup message including PtP radio bearer information of the desired MBMS service is received after receiving the routing area update confirmation message, receiving the desired MBMS service according to the PtP radio bearer information; Characterized in that the method. 43. The method of claim 42, wherein performing the routing area update comprises: If it is determined that the desired MBMS service is valid according to the service validity message received after the routing area update confirmation message, requesting the desired MBMS service from the wireless network controller; If it is determined that the desired MBMS service is not valid according to the service validity message received after the routing area update confirmation message, terminating the desired MBMS service; Receiving a desired MBMS service according to the PtP radio bearer information when a radio bearer setup message including PtP radio bearer information of the desired MBMS service is received after the routing area update confirmation message; The method. 42. The method of claim 41, wherein performing the routing area update comprises: If it is determined that the desired MBMS service is valid according to service information included in the routing area update confirmation message, receiving the desired MBMS service according to PtP radio bearer information of the MBMS service included in the service information; And waiting for the desired MBMS service to be valid for the service. 46. The method of claim 45, wherein performing the routing area update comprises: If it is determined that the desired MBMS service is valid according to the received service validity message after receiving the routing area update confirmation message, requesting the desired MBMS service from the wireless network controller; If it is determined that the desired MBMS service is not valid according to the received service validity message after receiving the routing area update confirmation message, moving to another cell capable of providing the desired MBMS service; If a radio bearer setup message including PtP radio bearer information of the desired MBMS service is received after receiving the routing area update confirmation message, receiving the desired MBMS service according to the PtP radio bearer information; Characterized in that the method. 46. The method of claim 45, wherein performing the routing area update comprises: If it is determined that the desired MBMS service is valid according to the service validity message received after the routing area update confirmation message, requesting the desired MBMS service from the wireless network controller; If it is determined that the desired MBMS service is not valid according to the service validity message received after the routing area update confirmation message, terminating the desired MBMS service; Receiving a desired MBMS service according to the PtP radio bearer information when a radio bearer setup message including PtP radio bearer information of the desired MBMS service is received after the routing area update confirmation message; The method. 41. The method of claim 40, wherein performing the routing area update comprises: Determining whether the routing area update is necessary; If the routing area update is not needed, waiting for resources to be available for the desired MBMS service in the current cell; If the routing area update is required, requesting a routing update from the RNC to receive a routing area update confirmation message; Determining whether the routing region update confirmation message includes information on at least one MBMS service in a cell; If the routing area update confirmation message does not include the service information, determining whether the desired MBMS service is valid according to the service validity message received by the desired MBMS service after the routing area update. The method. 49. The method of claim 48, wherein performing the routing area update comprises: If it is determined that the desired MBMS service is valid according to the service information included in the routing area update confirmation message, receiving the desired MBMS service according to PtP radio bearer information for the desired MBMS service included in the service information. Wow, And if it is determined that the desired MBMS service is not valid according to the service information, reselecting another cell capable of providing the desired MBMS service. The method of claim 49, wherein the performing of the routing area update comprises: If it is determined that the desired MBMS service is valid according to the received service validity message after receiving the routing area update confirmation message, requesting the desired MBMS service from the wireless network controller; If it is determined that the desired MBMS service is not valid according to the received service validity message after receiving the routing area update confirmation message, moving to another cell capable of providing the desired MBMS service; If a radio bearer setup message including PtP radio bearer information of the desired MBMS service is received after receiving the routing area update confirmation message, receiving the desired MBMS service according to the PtP radio bearer information; Characterized in that the method. The method of claim 49, wherein the performing of the routing area update comprises: If it is determined that the desired MBMS service is valid according to the service validity message received after the routing area update confirmation message, requesting the desired MBMS service from the wireless network controller; If it is determined that the desired MBMS service is not valid according to the service validity message received after the routing area update confirmation message, terminating the desired MBMS service; Receiving a desired MBMS service according to the PtP radio bearer information when a radio bearer setup message including PtP radio bearer information of the desired MBMS service is received after the routing area update confirmation message; The method. 49. The method of claim 48, wherein performing the routing area update comprises: If it is determined that the desired MBMS service is valid according to service information included in the routing area update confirmation message, receiving the desired MBMS service according to PtP radio bearer information of the MBMS service included in the service information; And waiting for the desired MBMS service to be valid for the service. 53. The method of claim 52, wherein performing the routing area update comprises: If it is determined that the desired MBMS service is valid according to the received service validity message after receiving the routing area update confirmation message, requesting the desired MBMS service from the wireless network controller; If it is determined that the desired MBMS service is not valid according to the received service validity message after receiving the routing area update confirmation message, moving to another cell capable of providing the desired MBMS service; If a radio bearer setup message including PtP radio bearer information of the desired MBMS service is received after receiving the routing area update confirmation message, receiving the desired MBMS service according to the PtP radio bearer information; Characterized in that the method. 53. The method of claim 52, wherein performing the routing area update comprises: If it is determined that the desired MBMS service is valid according to the service validity message received after the routing area update confirmation message, requesting the desired MBMS service from the wireless network controller; If it is determined that the desired MBMS service is not valid according to the service validity message received after the routing area update confirmation message, terminating the desired MBMS service; Receiving a desired MBMS service according to the PtP radio bearer information when a radio bearer setup message including PtP radio bearer information of the desired MBMS service is received after the routing area update confirmation message; The method. 46. The method of claim 45, wherein the waiting step comprises: And periodically monitoring a call channel related to MBMS services in the current cell. The method of claim 15, wherein receiving the desired MBMS service comprises: Abandoning reception of the desired MBMS service if the service validity message does not include the service identifier of the desired MBMS service; And if the resource validity information is false, waiting for a resource of the desired MBMS service to be available on the cell. 59. The method of claim 56, wherein receiving the desired MBMS service comprises: And if the service validity message does not include a service identifier of the desired MBMS service, performing a routing area update. 58. The method of claim 57, wherein performing the routing area update comprises: Determining whether the routing area update is necessary; If the routing area update is not needed, moving to another cell capable of providing the desired MBMS service or waiting for resources of the desired MBMS service to become available in the current cell; Requesting a routing area update and receiving a routing area update confirmation message from the wireless network controller if the routing area update is necessary; Confirming whether the routing area update confirmation message includes service information on at least one MBMS service valid in a cell in which the terminal is currently located; If the service information is not included in the routing area update confirmation message, determining whether the desired MBMS service is valid according to a service validity message received after performing the routing area update. Way. 59. The method of claim 58, wherein the performing of the routing area update, If it is determined that the desired MBMS service is valid according to the service information included in the routing area update confirmation message, receiving the desired MBMS service according to PtP radio bearer information for the desired MBMS service included in the service information. Wow, And if it is determined that the desired MBMS service is not valid according to the service information, reselecting another cell capable of providing the desired MBMS service. 60. The method of claim 59, wherein the performing of the routing area update, If it is determined that the desired MBMS service is valid according to the received service validity message after receiving the routing area update confirmation message, requesting the desired MBMS service from the wireless network controller; If it is determined that the desired MBMS service is not valid according to the received service validity message after receiving the routing area update confirmation message, moving to another cell capable of providing the desired MBMS service; If a radio bearer setup message including PtP radio bearer information of the desired MBMS service is received after receiving the routing area update confirmation message, receiving the desired MBMS service according to the PtP radio bearer information; Characterized in that the method. 60. The method of claim 59, wherein the performing of the routing area update, If it is determined that the desired MBMS service is valid according to the service validity message received after the routing area update confirmation message, requesting the desired MBMS service from the wireless network controller; If it is determined that the desired MBMS service is not valid according to the service validity message received after the routing area update confirmation message, terminating the desired MBMS service; Receiving a desired MBMS service according to the PtP radio bearer information when a radio bearer setup message including PtP radio bearer information of the desired MBMS service is received after the routing area update confirmation message; The method. 59. The method of claim 58, wherein the performing of the routing area update, If it is determined that the desired MBMS service is valid according to service information included in the routing area update confirmation message, receiving the desired MBMS service according to PtP radio bearer information of the MBMS service included in the service information; And waiting for the desired MBMS service to be valid for the service. 63. The method of claim 62, wherein performing the routing area update comprises: If it is determined that the desired MBMS service is valid according to the received service validity message after receiving the routing area update confirmation message, requesting the desired MBMS service from the wireless network controller; If it is determined that the desired MBMS service is not valid according to the received service validity message after receiving the routing area update confirmation message, moving to another cell capable of providing the desired MBMS service; If a radio bearer setup message including PtP radio bearer information of the desired MBMS service is received after receiving the routing area update confirmation message, receiving the desired MBMS service according to the PtP radio bearer information; Characterized in that the method. 63. The method of claim 62, wherein performing the routing area update comprises: If it is determined that the desired MBMS service is valid according to the service validity message received after the routing area update confirmation message, requesting the desired MBMS service from the wireless network controller; If it is determined that the desired MBMS service is not valid according to the service validity message received after the routing area update confirmation message, terminating the desired MBMS service; Receiving a desired MBMS service according to the PtP radio bearer information when a radio bearer setup message including PtP radio bearer information of the desired MBMS service is received after the routing area update confirmation message; The method. 58. The method of claim 57, wherein performing the routing area update comprises: Determining whether the routing area update is necessary; If the routing area update is not needed, waiting for resources to be available for the desired MBMS service in the current cell; If the routing area update is required, requesting a routing update from the RNC to receive a routing area update confirmation message; Determining whether the routing region update confirmation message includes information on at least one MBMS service in a cell; If the routing area update confirmation message does not include the service information, determining whether the desired MBMS service is valid according to the service validity message received by the desired MBMS service after the routing area update. The method. 66. The method of claim 65, wherein performing the routing area update comprises: If it is determined that the desired MBMS service is valid according to the service information included in the routing area update confirmation message, receiving the desired MBMS service according to PtP radio bearer information for the desired MBMS service included in the service information. Wow, And if it is determined that the desired MBMS service is not valid according to the service information, reselecting another cell capable of providing the desired MBMS service. The method of claim 66, wherein the performing of the routing area update comprises: If it is determined that the desired MBMS service is valid according to the received service validity message after receiving the routing area update confirmation message, requesting the desired MBMS service from the wireless network controller; If it is determined that the desired MBMS service is not valid according to the received service validity message after receiving the routing area update confirmation message, moving to another cell capable of providing the desired MBMS service; If a radio bearer setup message including PtP radio bearer information of the desired MBMS service is received after receiving the routing area update confirmation message, receiving the desired MBMS service according to the PtP radio bearer information; Characterized in that the method. The method of claim 66, wherein the performing of the routing area update comprises: If it is determined that the desired MBMS service is valid according to the service validity message received after the routing area update confirmation message, requesting the desired MBMS service from the wireless network controller; If it is determined that the desired MBMS service is not valid according to the service validity message received after the routing area update confirmation message, terminating the desired MBMS service; Receiving a desired MBMS service according to the PtP radio bearer information when a radio bearer setup message including PtP radio bearer information of the desired MBMS service is received after the routing area update confirmation message; The method. 66. The method of claim 65, wherein performing the routing area update comprises: If it is determined that the desired MBMS service is valid according to service information included in the routing area update confirmation message, receiving the desired MBMS service according to PtP radio bearer information of the MBMS service included in the service information; And waiting for the desired MBMS service to be valid for the service. The method of claim 69, wherein the performing of the routing area update comprises: If it is determined that the desired MBMS service is valid according to the received service validity message after receiving the routing area update confirmation message, requesting the desired MBMS service from the wireless network controller; If it is determined that the desired MBMS service is not valid according to the received service validity message after receiving the routing area update confirmation message, moving to another cell capable of providing the desired MBMS service; If a radio bearer setup message including PtP radio bearer information of the desired MBMS service is received after receiving the routing area update confirmation message, receiving the desired MBMS service according to the PtP radio bearer information; Characterized in that the method. The method of claim 69, wherein the performing of the routing area update comprises: If it is determined that the desired MBMS service is valid according to the service validity message received after the routing area update confirmation message, requesting the desired MBMS service from the wireless network controller; If it is determined that the desired MBMS service is not valid according to the service validity message received after the routing area update confirmation message, terminating the desired MBMS service; Receiving a desired MBMS service according to the PtP radio bearer information when a radio bearer setup message including PtP radio bearer information of the desired MBMS service is received after the routing area update confirmation message; The method. The method of claim 62, wherein the waiting step, And periodically monitoring a call channel related to MBMS services in the current cell. The method of claim 15, wherein receiving the desired MBMS service comprises: If the service validity message does not include a service identifier of the desired MBMS service, moving to another cell capable of the desired MBMS service; And if the resource validity information is false, waiting for a resource of the desired MBMS service to be available on the cell. 80. The method of claim 73, wherein receiving the desired MBMS service comprises: And if the service validity message does not include a service identifier of the desired MBMS service, performing a routing area update. 75. The method of claim 74, wherein performing the routing area update comprises: Determining whether the routing area update is necessary; If the routing area update is not needed, moving to another cell capable of providing the desired MBMS service or waiting for resources of the desired MBMS service to become available in the current cell; Requesting a routing area update and receiving a routing area update confirmation message from the wireless network controller if the routing area update is necessary; Confirming whether the routing area update confirmation message includes service information on at least one MBMS service valid in a cell in which the terminal is currently located; If the service information is not included in the routing area update confirmation message, determining whether the desired MBMS service is valid according to a service validity message received after performing the routing area update. Way. 76. The method of claim 75, wherein performing the routing area update comprises: If it is determined that the desired MBMS service is valid according to the service information included in the routing area update confirmation message, receiving the desired MBMS service according to PtP radio bearer information for the desired MBMS service included in the service information. Wow, And if it is determined that the desired MBMS service is not valid according to the service information, reselecting another cell capable of providing the desired MBMS service. 77. The method of claim 76, wherein performing the routing area update comprises: If it is determined that the desired MBMS service is valid according to the received service validity message after receiving the routing area update confirmation message, requesting the desired MBMS service from the wireless network controller; If it is determined that the desired MBMS service is not valid according to the received service validity message after receiving the routing area update confirmation message, moving to another cell capable of providing the desired MBMS service; If a radio bearer setup message including PtP radio bearer information of the desired MBMS service is received after receiving the routing area update confirmation message, receiving the desired MBMS service according to the PtP radio bearer information; Characterized in that the method. 77. The method of claim 76, wherein performing the routing area update comprises: If it is determined that the desired MBMS service is valid according to the service validity message received after the routing area update confirmation message, requesting the desired MBMS service from the wireless network controller; If it is determined that the desired MBMS service is not valid according to the service validity message received after the routing area update confirmation message, terminating the desired MBMS service; Receiving a desired MBMS service according to the PtP radio bearer information when a radio bearer setup message including PtP radio bearer information of the desired MBMS service is received after the routing area update confirmation message; The method. 76. The method of claim 75, wherein performing the routing area update comprises: If it is determined that the desired MBMS service is valid according to service information included in the routing area update confirmation message, receiving the desired MBMS service according to PtP radio bearer information of the MBMS service included in the service information; And waiting for the desired MBMS service to be valid for the service. 80. The method of claim 79, wherein performing the routing area update comprises: If it is determined that the desired MBMS service is valid according to the received service validity message after receiving the routing area update confirmation message, requesting the desired MBMS service from the wireless network controller; If it is determined that the desired MBMS service is not valid according to the received service validity message after receiving the routing area update confirmation message, moving to another cell capable of providing the desired MBMS service; If a radio bearer setup message including PtP radio bearer information of the desired MBMS service is received after receiving the routing area update confirmation message, receiving the desired MBMS service according to the PtP radio bearer information; Characterized in that the method. 80. The method of claim 79, wherein performing the routing area update comprises: If it is determined that the desired MBMS service is valid according to the service validity message received after the routing area update confirmation message, requesting the desired MBMS service from the wireless network controller; If it is determined that the desired MBMS service is not valid according to the service validity message received after the routing area update confirmation message, terminating the desired MBMS service; Receiving a desired MBMS service according to the PtP radio bearer information when a radio bearer setup message including PtP radio bearer information of the desired MBMS service is received after the routing area update confirmation message; The method. 75. The method of claim 74, wherein performing the routing area update comprises: Determining whether the routing area update is necessary; If the routing area update is not needed, waiting for resources to be available for the desired MBMS service in the current cell; If the routing area update is required, requesting a routing update from the RNC to receive a routing area update confirmation message; Determining whether the routing region update confirmation message includes information on at least one MBMS service in a cell; If the routing area update confirmation message does not include the service information, determining whether the desired MBMS service is valid according to the service validity message received by the desired MBMS service after the routing area update. The method. 84. The method of claim 82, wherein performing the routing area update comprises: If it is determined that the desired MBMS service is valid according to the service information included in the routing area update confirmation message, receiving the desired MBMS service according to PtP radio bearer information for the desired MBMS service included in the service information. Wow, And if it is determined that the desired MBMS service is not valid according to the service information, reselecting another cell capable of providing the desired MBMS service. 84. The method of claim 83, wherein performing the routing area update comprises: If it is determined that the desired MBMS service is valid according to the received service validity message after receiving the routing area update confirmation message, requesting the desired MBMS service from the wireless network controller; If it is determined that the desired MBMS service is not valid according to the received service validity message after receiving the routing area update confirmation message, moving to another cell capable of providing the desired MBMS service; If a radio bearer setup message including PtP radio bearer information of the desired MBMS service is received after receiving the routing area update confirmation message, receiving the desired MBMS service according to the PtP radio bearer information; Characterized in that the method. 84. The method of claim 83, wherein performing the routing area update comprises: If it is determined that the desired MBMS service is valid according to the service validity message received after the routing area update confirmation message, requesting the desired MBMS service from the wireless network controller; If it is determined that the desired MBMS service is not valid according to the service validity message received after the routing area update confirmation message, terminating the desired MBMS service; Receiving a desired MBMS service according to the PtP radio bearer information when a radio bearer setup message including PtP radio bearer information of the desired MBMS service is received after the routing area update confirmation message; The method. 84. The method of claim 82, wherein performing the routing area update comprises: If it is determined that the desired MBMS service is valid according to service information included in the routing area update confirmation message, receiving the desired MBMS service according to PtP radio bearer information of the MBMS service included in the service information; And waiting for the desired MBMS service to be valid for the service. 87. The method of claim 86, wherein performing the routing area update comprises: If it is determined that the desired MBMS service is valid according to the received service validity message after receiving the routing area update confirmation message, requesting the desired MBMS service from the wireless network controller; If it is determined that the desired MBMS service is not valid according to the received service validity message after receiving the routing area update confirmation message, moving to another cell capable of providing the desired MBMS service; If a radio bearer setup message including PtP radio bearer information of the desired MBMS service is received after receiving the routing area update confirmation message, receiving the desired MBMS service according to the PtP radio bearer information; Characterized in that the method. 87. The method of claim 86, wherein performing the routing area update comprises: If it is determined that the desired MBMS service is valid according to the service validity message received after the routing area update confirmation message, requesting the desired MBMS service from the wireless network controller; If it is determined that the desired MBMS service is not valid according to the service validity message received after the routing area update confirmation message, terminating the desired MBMS service; Receiving a desired MBMS service according to the PtP radio bearer information when a radio bearer setup message including PtP radio bearer information of the desired MBMS service is received after the routing area update confirmation message; The method. 90. The method of claim 89, wherein the waiting step comprises: And periodically monitoring a call channel related to MBMS services in the current cell. The method of claim 12, wherein the receiving of the service validity message comprises: Receiving system information through a broadcast channel and determining whether the system information includes configuration information of an MBMS control channel; If the configuration information of the MBMS control channel is included, the radio bearer information message is received through the MBMS control channel using the configuration information, and whether the service identifier of the desired MBMS service is included in the radio bearer information message. Judging, And if the radio bearer information message includes the service identifier of the desired MBMS service, receiving the service validity message through the MBMS control channel.

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