WO2005078968A1 - Method for transmitting service information between network nodes for mbms service in mobile communication system - Google Patents
Method for transmitting service information between network nodes for mbms service in mobile communication system Download PDFInfo
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- WO2005078968A1 WO2005078968A1 PCT/KR2005/000406 KR2005000406W WO2005078968A1 WO 2005078968 A1 WO2005078968 A1 WO 2005078968A1 KR 2005000406 W KR2005000406 W KR 2005000406W WO 2005078968 A1 WO2005078968 A1 WO 2005078968A1
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- mbms
- network node
- cell
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- terminal
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- 238000000034 method Methods 0.000 title claims abstract description 64
- 238000010295 mobile communication Methods 0.000 title description 8
- 230000004044 response Effects 0.000 claims description 17
- 230000011664 signaling Effects 0.000 claims description 17
- 230000008569 process Effects 0.000 description 23
- 230000005540 biological transmission Effects 0.000 description 9
- 230000001276 controlling effect Effects 0.000 description 5
- GFRROZIJVHUSKZ-FXGMSQOLSA-N OS I Natural products C[C@@H]1O[C@@H](O[C@H]2[C@@H](O)[C@@H](CO)O[C@@H](OC[C@@H](O)[C@@H](O)[C@@H](O)CO)[C@@H]2NC(=O)C)[C@H](O)[C@H](O)[C@H]1O GFRROZIJVHUSKZ-FXGMSQOLSA-N 0.000 description 1
- 101150081027 RNC1 gene Proteins 0.000 description 1
- 101100426111 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) TRM2 gene Proteins 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
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- 101150015070 rnc2 gene Proteins 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0007—Control or signalling for completing the hand-off for multicast or broadcast services, e.g. MBMS
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/12—Reselecting a serving backbone network switching or routing node
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/40—Connection management for selective distribution or broadcast
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/10—Reselecting an access point controller
Definitions
- the present invention relates to a multimedia broadcast/multicast service (MBMS) in a mobile communication system and, more particularly, to a method for transmitting service information between network nodes (elements) when a terminal is moved from one RNC to another RNC.
- MBMS multimedia broadcast/multicast service
- a universal mobile telecommunication system which is a European-type IMT-2000 system, is a third generation mobile communication system that has evolved from a European standard known as Global System for Mobile communications (GSM) that aims to provide an improved mobile communication service based upon a GSM core network and wideband code division multiple access (W-CDMA) wireless connection technology.
- GSM Global System for Mobile communications
- W-CDMA wideband code division multiple access
- the UMTS is roughly divided into a terminal (or user equipment: UE), a UTRAN, and a core network (CN).
- the UTRAN includes one or more radio network sub-systems (RNSs), and each RNS includes one radio network controller (RNC) and a plurality of base stations (referred to as hereinafter 'Node B').
- RNC radio network controller
- Each Node B is managed by the RNC, receive information sent by the physical layer of a terminal 10 through an uplink (UL: from terminal to network), and transmit data to a terminal 10 through a downlink (DL: from network to terminal), and operates as an access point (AP) of the UTRAN for the terminal.
- the RNC handles allocation of radio resources and serves as AP with the CN.
- Figure 2 illustrates a connection structure between the UTRAN and the terminal in the UMTS network.
- the terminal in order to receive a service provided in the UMTS, the terminal must be connected with the CN, and information of the terminal and the CN is transmitted by way of the
- the CN and the RNC are connected through an lu interface to transmit and receive data and a control message.
- Each terminal connected with the UMTS network is managed by a specific RNC of the UTRAN.
- the RNC managing the terminal is called an SRNC (Serving RNC).
- the SRNC refers to the RNC which serves as an AP with the CN for data transmission of a specific terminal.
- the SRNC plays a role of a second layer of an OS I (Open System Interface) with respect to data received through a radio interface or transmitted to the terminal and allocates a radio resource suitable for providing a service.
- Radio resource management functions of the SRNC includes every control functions related to a specific terminal such as setting a transport channel, determining handover or open loop power controlling.
- a terminal connected with the CN through the UTRAN at a specific point has only one SRNC.
- one RNC is used for connection between the terminal and the SRNC, but in case that the terminal is moved into an area handled by a different RNC, the terminal is connected with an SRNC by way of an RNC of the area into which the terminal has moved.
- the terminal is initially connected through an R1 (RNC1), and when the terminal is moved into a cell managed by an R2 (RNC2), the terminal is connected to the R1 through an lur interface by wav of R2. That is,
- the R1 still manages the terminal and serves as an access point with the CN and the R2 simply performs a partial function of routing user data or allocating a code of a common resource.
- every RNC, except for the SRNC, connected with the terminal is called a DRNC (Drift RNC).
- One terminal can have the DRNC or one or several DRNCs according to a connection state.
- the SRNC and the DRNC transmit and receive signaling messages such as an uplink signaling transfer message, a radio link establishment message and a radio link additional message, etc., through the lur interface.
- the discrimination of the SRNC and the DRNC is logical with respect to a specific terminal. Since the RNC and the Node B have a dependent relationship in the UTRAN, the RNC can be discriminated at the side of the Node B.
- an RNC handling management of a specific Node B is called a CRNC (Controlling RNC).
- a CRNC Controlling RNC
- an RNC which is connected with the Node B by the lub interface and controls radio resources of the Node B corresponds to a CRNC of the Node B.
- the CRNC and the Node B have a point-to-multipoint relation.
- the CRNC performs a function of controlling a load and congestion of traffic in a cell managed by the CRNC itself, controlling acceptance of a new radio link established in the cell, and allocating a code.
- a radio resource control (RRC) layer is defined at a third layer of the radio protocol where the RNC and the terminal are positioned.
- the RRC takes charge of controlling the transport and physical channels with respect to establishment, reconfiguration and release of radio bearers (RBs).
- RB service means a service provided by the second layer of the radio protocol or data transmission between the terminal and the UTRAN.
- the configuration of RB means that characteristics of protocol layers and channels required for providing specific services are regulated as well as the respective specific parameters and operational methods are set up.
- the terminal When an RRC layer of a specific terminal and an RRC layer of the RNC are connected to transmit and receive an RRC message each other, the terminal is in an RRC connection mode, and when the RRC layer of the specific terminal and the RRC layer of the RNC are not connected, the terminal is in an RRC idle mode state.
- an SRNC Server RNC
- the RNC recognizes the corresponding terminal by units of cell and manages it.
- the MBMS refers to a method for providing a streaming or background service to multiple terminals by using a downlink-exclusive MBMS bearer service.
- an MBMS bearer uses a point-to-multipoint RB and a point-to-point RB service.
- the MBMS can be supported only by a system providing a function for the MBMS among UMTS systems of an R6 version. For example, among UMTS system such as R99, R4 and R5 or R6 UMTS system, if a system does not consider the MBMS function, it cannot provide the MBMS.
- the MBMS can be classified into a broadcast mode and a multicast mode.
- the MBMS broadcast mode is a service for transmitting multimedia data to every user in a broadcast area
- the MBMS multicast mode is a service for transmitting multimedia data to only a specific user group of a multicast area.
- the broadcast area refers to an area where a broadcast service can be provided and the multicast area refers to an area where the multicast service can be provided.
- the broadcast area and the multicast area are called a service area.
- Figure 3 illustrates a process that the UMTS network provides a specific MBMS (service 1) to the UE by using a multicast mode.
- the user UE1 desiring to receive a MBMS service must perform a subscription procedure.
- subscription refers to the acts of establishing a relationship between the service provider and the user.
- users wishing to receive an MBMS service must also receive a service announcement provided from the network.
- service announcement refers to the function of informing the terminal about a list (index) of the services to be provided and related information.
- 'multicast group' refers to a group of users that receive a specific multicast service
- 'joining' means merging with the multicast group that has particular users who wish to receive the specific multicast service.
- the terminal can inform the UTRAN of its intent to receive the particular multicast data (service).
- the procedure for terminating the joining of the multicast group is referred to as 'leaving'.
- the subscribing, joining, and leaving procedures is performed for each terminal, and a terminal may perform the subscribing, joining, and leaving procedures before, during, or any time after data transmission.
- a particular MBMS service is in progress, one or more sessions for that service may occur in sequence.
- the core network CN
- the core network informs a session start to the RNC.
- the CN informs a session stop to the RNC. Between the session start and the session stop, data transmission for the particular MBMS service can be performed.
- MBMS notification refers a function of the RNC for informing the terminal that the transmission of data for a particular MBMS service within a certain cell is impending.
- the MTMS notification is transmitted one or more times until actual data of a service is transmitted.
- the RNC can perform a counting function of recognizing the number of terminals that wish to receive a particular MBMS service within a particular cell by using the MBMS notification process.
- the counting function is used to determine whether the radio bearer for providing the particular MBMS service should be set as point-to-multipoint or point-to-point, or whether no radio bearer is set.
- the RNC compares the counted number of terminals with an internally set threshold value. Namely, after performing the counting function, the RNC may set a point-to-point MBMS radio bearer if the number of terminals existing within the corresponding cell is smaller than a threshold value, and may set a point-to-multipoint MBMS radio bearer if the number of terminals existing within the corresponding cell is greater than or equal to the threshold value.
- the RNC informs the terminal about the corresponding radio bearer.
- terminals that wish to receive the service are all in the RRC connection mode state.
- all the terminals wishing to receive the corresponding service need not be in the RRC connection mode state. Namely, terminals in the idle mode state can also receive the point-to-multipoint radio bearer.
- the RNC does not set the radio bearer nor transmit the MBMS data. Setting of a radio bearer by the RNC in spite of the fact that no user wants the service is a waste of radio resource.
- the MBMS service area refers to an area where a specific
- MBMS service can be provided to a specific terminal.
- the MBMS service area can be indicated by one or more cells, and can be included in an area managed by one RNC or in an area managed by several RNCs.
- a list of neighboring cell information refers to a list including information of cells managed by a DRNC positioned near the RNC.
- Figure 4 illustrates an MBMS UE linking process. As shown in Figure 4, in the MBMS UE linking process, the SRNC registers a specific terminal, which has subscribed for the specific MBMS service, for an MBMS service context managed by the SRNC itself.
- the MBMS service context refers to including of information required for managing the specific MBMS service in the UTRAN.
- the SRNC receives an MBMS UE linking request message from the CN (step S10). Then, the SRNC registers information on the terminal for the MBMS service context with respect to the MBMS service and transmits an MBMS UE linking response message to the CN (step S11). If there is no MBMS service context with respect to the MBMS service, an MBMS service context is newly generated.
- Figure 5 illustrates an MBMS attach process. With reference to Figure 5, the RNC providing the MBMS service recognizes and manages a terminal in the RRC connection mode state among terminals participating in a specific MBMS service in each cell handled by the RNC itself.
- the RNC makes a list of terminals in the RRC connection mode for each MBMS service of each cell.
- the RRC connection mode terminal list includes identifiers (URNTI) of terminals participating in the specific MBMS service.
- the MBMS connection process refers to a process in which with respect to an MBMS service in-process among MBMS service for which the terminal in the RRC connection mode state has joined, if the terminal is moved from a cell handled by the SRNC to a cell handled by the DRNC, the SRNC transmits terminal information through an MBMS connection request message to the DRNC so that the DRNC can add the MBMS connection-requested terminal to the RRC connection mode terminal list managed by the DRNC with respect to the MBMS service.
- the SRNC transmits the terminal information to the DRNC through an MBMS connection request message so that the DRNC can add the MBMS connection-requested terminal to the RRC connection mode terminal list.
- the MBMS connection request message includes an ID of the cell into which the terminal has moved, an ID of the MBMS service for which the terminal has joined, and a terminal identifier (URNTI).
- the DRNC Upon receiving the MBMS connection request message with respect to the specific terminal from the SRNC (step S20), if the DRNC can allocate a resource for maintaining the RRC connection mode state to the terminal, the DRNC accepts the MBMS connection request of the terminal and adds the terminal identifier to the RRC connection mode terminal list with respect to the terminal-joined MBMS service (namely, the MBMS service of the cell into which the terminal has moved). Thereafter, the DRNC transmits a positive response to the SRNC through an MBMS connection response message (step S21).
- the SRNC Upon receiving the MBMS connection response message, the SRNC maintains the terminal in the RRC connection mode state in the cell into which the terminal has moved, and transmits MBMS service data to the terminal by using a point-to-point radio bearer. Namely, theMBMS service data- is transmitted to the DRNC through the SRNC and then from the DRNC to the terminal by using the point-to-point radio bearer.
- the DRNC receives the MBMS connection request message with respect to the specific terminal from the SRNC, it does not always accept it.
- the DRNC rejects the MBMS connection request of the terminal and transmits a negative response to the SRNC.
- the related art have the following problems when the SRNC transmits the MBMS connection request message to the DRNC. That is, when the specific terminal is moved into the cell managed by the DRNC, the SRNC transmits the MBMS connection request message to the DRNC regardless of a state of the cell.
- the cell of the DRNC into which the terminal has moved is not included in the MBMS service area of the terminal-joined MBMS service, the cell of the DRNC cannot be provided with the MBMS service. In this case, it is not necessary for the SRNC to transmit the MBMS connection request message with respect to the MBMS service to the DRNC cell where the MBMS service cannot be provided. In addition, if the DRNC or the Node B of the cell into which the terminal has moved does not support the MBMS function, the cell cannot provide the terminal-joined MBMS service. Also, in this case, the SRNC does not need to transmit the MBMS connection request message to the DRNC which manages the cell.
- the SRNC unnecessarily transmits the MBMS connection message to the DRNC without knowledge of the corresponding situation.
- Such transmission of the unnecessary MBMS connection message leads to increase in a signaling load between the SRNC and the DRNC, resulting in increase congestion in the network and degradation of efficiency of using of network resources.
- one object of the present invention is to provide a method for effectively transmitting service information between network nodes in performing an MBMS service.
- Another object of the present invention is to provide a method for transmitting service information capable of reducing congestion in a network by reducing a signaling load between an SRNC (Serving Radio Network Controller) and a DRNC (Drift RNC).
- Still another object of the present invention is to provide a method for transmitting service information for an MBMS service capable of increasing efficiency of using of network resources by selectively transmitting an MBMS connection request message by an SRNC to a DRNC when a terminal is moved from on RNC to another RNC.
- a method for transmitting service information between network nodes for an MBMS wherein when a terminal is moved from a first network node to a cell managed by a second network node, the first network node receives status information of the cell from a third network node, and when the specific terminal is moved into the cell later, the first network node selectively transmits an MBMS connection request message to the second network node based on the stored status information.
- the first network node transmits the MBMS connection request message to the second node only when the cell is the specific MBMS service area or only when the cell supports the MBMS function.
- the first to the third network nodes are an SRNC, a DRNC and a core network (CN), respectively.
- the status information includes MBMS service area information of a neighboring cell and/or information on whether an MBMS function is supported with respect to an MBMS service for which the terminal has joined, and is transmitted through one of an lu interface signaling message, an MBMS terminal linking message and an MBMS session start message.
- the lu interface signaling message includes whether a neighboring cell supports the MBMS function
- the MBMS terminal linking message and the MBMS session start message includes MBMS service area information of the neighboring cell and information on whether the MBMS function is supported.
- a method for transmitting service information between network nodes for an MBMS service wherein when a terminal is moved from a first network node to a cell managed by a second network node, the first network node requests status information of the cell from the second network node, and when the specific terminal is moved into the cell later, the first network node selectively transmits an MBMS connection request message to the second network node according to the received status information.
- the first network node transmits the MBMS connection request message to the second network node only when the cell is within a specific MBMS service area or supports the MBMS function.
- the first and second network nodes are an SRNC and a DRNC, respectively.
- the status information is transmitted through a response message to one of an MBMS connection request message of the first network node, a radio link setup request message and a radio link addition message.
- the MBMS connection request message includes MBMS service area information of a neighboring cell
- the radio link setup request message and the radio link addition message include MBMS service area information of a neighboring cell and information on whether an MBMS function can be supported.
- Figure 1 illustrates an exemplary basic structure of a general
- Figure 2 illustrates a connection structure between a UTRAN and a terminal in the UMTS network
- Figure 3 illustrates a process of providing a specific MBMS service (service 1) by using a multicast mode in the UMTS network
- Figure 4 illustrates an MBMS UE linking process
- Figure 5 illustrates an MBMS attach process
- Figure 6 illustrates a process in which an SRNC receives a general lu signaling message from a CN and adds a neighboring cell information list
- Figure 7 illustrates a process in which the SRNC receives an MBMS UE linking message from the CN and adds a neighboring cell information list
- Figure 8 illustrates a process in which the SRNC receives an MBMS session start message from the CN and adds a neighboring cell information list
- Figure 9 illustrates a process in which the SRNC receives an MBMS connection response message from the CN and adds a neighboring cell information list
- Figure 10 illustrates a process in which the SR
- the present invention is implemented in a mobile communication system such as a UMTS (Universal Mobile Telecommunications System) developed by 3GPP.
- UMTS Universal Mobile Telecommunications System
- the present invention can be also applied to a communication system operating in a different standard. Preferred embodiments of the present invention will now be described.
- the present invention proposes a scheme that an SRNC transmits an MBMS connection request message to a DRNC only whennecessary, unlike the related art in which when a specific terminal is moved into a cell managed by the DRNC, the SRNC transmits always the MBMS connection request message to the DRNC regardless of a state of the cell.
- the SRNC when it performs a process for MBMS connection to the DRNC, it receives MBMS service area information of a neighboring cell and information on whether an MBMS function can be provided from an interface (lu or lur), based on which the SRNC determines whether to transmit the MSM connection request message.
- information indicating whether a specific cell managed by an RNC provides an MBMS function or not is referred to as MBMS function supportable/non-supportable information.
- the MBMS function supportable/non-supportable information with respect to the cell has MBMS function non-supportable information if a version of an RNC for managing the cell or a version of a Node B providing radio resource to the cell is lower than R6, or if the version of the RNC or the version of the Node B is R6 but has no function of supporting the MBMS service. If the RNC managing the cell or the Node B providing radio resource to the cell have the function of supporting the MBMS service, it has the MBMS function supportable information.
- the SRNC receives MBMS service area information of the eel! managed by the RNC or an adjacent RNC from the CN connected to the SRNC.
- the SRNC receives the terminal-joined MBMS service area information of a cell into which the terminal has moved from a DRNC of the cell into which the specific terminal has moved.
- the SRNC determines that the cell is not the MBMS service area with respect to the MBMS service, when the specific terminal is moved into the cell later, the SRNC does not transmit an MBMS service connection request message with respect to the MBMS service to a DRNC managing the cell, and does not provide the MBMS service or provides a point-to-point service.
- the SRNC receives information on whether the MBMS function can be supported in the cell managed by the RNC or the neighboring RNC from the CN connected to the SRNC itself.
- the SRNC receives information on whether the MBMS function can be supported in the cell into which the specific terminal has moved from the DRNC of the cell. If the SRNC determines that the cell does not support the MBMS function, when the specific terminal is moved into the cell, the SRNC does not transmit the MBMS connection request message with respect to every MBMS service to the DRNC managing the cell, does not provide the MBMS service or provides a point-to-point service.
- the SRNC can receive MBMS service area information of a neighboring cell or information on whether the MBMS can be supported from the CN connected with the SRNC itself.
- Figure 6 illustrates a process in which an SRNC receives a general lu signaling message from a CN and adds a neighboring cell information list.
- the SRNC receives a general lu signaling message from the CN (step S30).
- the lu signaling message can include information on whether a cell managed by the RNC or a neighboring RNC supports the MBMS function.
- the CN can transmit the general lu signaling message to the SRNC regardless of the MBMS service.
- the SRNC recognizes the information on whether a cell managed by the RNC or the neighboring RNC supports the MBMS function as included in the lu signaling message, and adds the recognized MBMS function supportable/non-supportable information to a neighboring cell information list (step S31). Accordingly, when a specific terminal is moved into the cell, if the SRNC determines that the cell does not support the MBMS function based on the MBMS function supportable/non-supportable information, the SRNC does not transmjt an MBMS connection request message with respect to every MBMS service to a DRNC managing the cell, and does not provide every MBMS service to the terminal or provides a point-to-point service.
- Figure 7 illustrates a process in which the SRNC receives an MBMS UE linking message from the CN and adds a neighboring cell information list.
- the SRNC receives an MBMS UE linking message from the CN (step S40).
- the MBMS UE linking message includes neighboring cell MBMS service area information with respect to MBMS services for which a specific terminal has joined and MBMS service function supportable/non-supportable information of the neighboring cell with respect to every MBMS service.
- the SRNC recognizes the MBMS service area information of the neighboring cell and the MBMS function supportable/non-supportable information of the neighboring cell included in the message and adds the recognized service area information to the neighboring cell information list (step S41). Thereafter, when the specific terminal is moved into the cell, if the cell is determined not to be the MBMS service are of the MBMS service, the SRNC does not transmit the MBMS connection request message with respect to the MBMS service to the DRNC managing the cell, does not provide the MBMS service to the terminal or provides a point-to-point service. In addition, the SRNC can add the MBMS function supportable/non-supportable information of the neighboring cell to the neighboring cell information list.
- Figure 8 illustrates a process in which the SRNC receives an MBMS session start message from the CN and adds a neighboring cell information list. First, the SRNC receives an MBMS session start message from the CN (step S50).
- the MBMS session start message includes neighboring cell MBMS service area information with respect to MBMS services for which a specific terminal has joined and information on whether a neighboring cell can support MBMS service function with respect to every MBMS service.
- the SRNC recognizes the MBMS service area information of the neighboring cell and the information on whether the neighboring cell can support the MBMS function as included in the message and then adds the MBMS service area information to the neighboring cell information list (step S51). Thereafter, when the specific terminal is moved into the cell, if the cell is determined not an MBMS service area of the MBMS service, the SRNC does not transmit an MBMS connection request message with respect to the MBMS service to a
- the SRNC can add the information on whether the neighboring cell can support the MBMS function to the neighboring cell information list. Accordingly, when a specific terminal is moved into the cell, if the cell is determined not support the MBMS function, the SRNC does not transmit an MBMS connection request message with respect to every MBMS service to the DRNC managing the cell, and does not provide every MBMS service to the terminal or provides a point-to-point service.
- Figure 9 illustrates a process in which the SRNC receives an
- a SRNC senses the movement of the terminal and transmits an MBMS connection request message with respect to the MBMS service being received by the terminal to a DRNC (step S60).
- the DRNC transmits an MBMS connection response message to the
- the MBMS connection response message includes
- the SRNC receives the MBMS connection response message from the DRNC, checks the MBMS service area information of the terminal-moved cell, and adds the checked MBMS service area information into the neighboring cell information list (step S62).
- the SRNC determines that the cell is not the MBMS service area of the MBMS service, the SRNC does not transmit the MBMS connection request message with respect to the MBMS service to the DRNC managing the cell, does not provide the MBMS service to the terminal or provides a point-to-point service.
- the SRNC can receive
- FIG 10 illustrates a process in which the SRNC receives a radio link setup request message from the CN and adds a neighboring cell information list.
- the SRNC senses the movement of the terminal and transmits a radio link setup request message to the DRNC for setting up a radio link for the terminal (step S70).
- the DRNC transmits a radio link setup response message to the radio link setup request message to the SRNC (step S71), and in this case, the radio link setup response message includes MBMS service area information with respect to every MBMS service of the cell into which the terminal has moved and information on whether the MBMS function can be supported. Accordingly, the SRNC receives the link setup response message from the DRNC and checks the MBMS service area information MBMS service area information of the terminal-moved cell, and adds the corresponding MBMS service area information to the neighboring cell information list (step S72).
- the SRNC determines that the cell is no the MBMS service are of the specific MBMS service, the SRNC does not transmit the MBMS connection request message with respect to the MBMS service to the DRNC managing the cell, and does not provide the MBMS service to the terminal or provides a point-to-point service.
- the SRNC can check the information on whether the cell, into which the terminal has moved, supports the MBMS function, and add it to the neighboring cell information list.
- the SRNC determines that the cell does not support the MBMS function, it does not transmit the MBMS connection request message with respect to every MBMS service to the DRNC managing the cell, and does not provide every MBMS service to the terminal or provides a point-to-point service.
- the SRNC when a specific terminal is moved into a cell managed by the DRNC, the SRNC does not transmit the MBMS connection request message to the DRNC regardless of a state of the cell, but transmits the MBMS connection request message only when it is necessary.
- the SRNC receives the MBMS service area information of the neighboring cell and information on whether the MBMS function is supported from the CN or from the DRNC, stores them, and then, if the cell into which the specific terminal has moved is not the MBMS service area of the specific MBMS service or does not support the MBMS function, the SRNC does not transmit the MBMS connection request message to the DRNC managing the cell, does not provide the MBMS service to the terminal or provides the point-to-point service. Therefore, when the terminal is moved from one RNC to another RNC, unnecessary message transmission between the RNCs can be reduced. Accordingly, an increase in a network load between the RNCs and thus network use efficiency can be enhanced.
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Abstract
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05726456A EP1719269A1 (en) | 2004-02-13 | 2005-02-14 | Method for transmitting service information between network nodes for mbms service in mobile communication system |
CN2005800046061A CN1918823B (en) | 2004-02-13 | 2005-02-14 | Method for transmitting service information between network nodes for MBMS service in mobile communication system |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US54480104P | 2004-02-13 | 2004-02-13 | |
US60/544,801 | 2004-02-13 | ||
KR1020040013183A KR101044862B1 (en) | 2004-01-08 | 2004-02-26 | Method for transmitting service information between network nodes for mbms service in mobile communication system |
KR10-2004-0013183 | 2004-02-26 |
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WO2005078968A1 true WO2005078968A1 (en) | 2005-08-25 |
WO2005078968A8 WO2005078968A8 (en) | 2006-04-06 |
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PCT/KR2005/000406 WO2005078968A1 (en) | 2004-02-13 | 2005-02-14 | Method for transmitting service information between network nodes for mbms service in mobile communication system |
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EP (1) | EP1719269A1 (en) |
WO (1) | WO2005078968A1 (en) |
Cited By (2)
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CN100456892C (en) * | 2006-10-13 | 2009-01-28 | 华为技术有限公司 | A cell multimedia broadcasting service migration method and wireless network controller |
EP2086246A1 (en) * | 2006-11-16 | 2009-08-05 | NTT DoCoMo, Inc. | Communication control device and communication control method |
Citations (3)
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WO2001039534A1 (en) * | 1999-11-23 | 2001-05-31 | Telefonaktiebolaget Lm Ericsson (Publ) | Srns relocation in a umts network |
US20010046218A1 (en) * | 1999-12-10 | 2001-11-29 | Mauro Costa | Mobile radio telecommunications system with sychronized handover |
WO2005020618A1 (en) * | 2003-08-22 | 2005-03-03 | Lg Electronics Inc. | Mbms method and apparatus for umts network |
-
2005
- 2005-02-14 WO PCT/KR2005/000406 patent/WO2005078968A1/en active Application Filing
- 2005-02-14 EP EP05726456A patent/EP1719269A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2001039534A1 (en) * | 1999-11-23 | 2001-05-31 | Telefonaktiebolaget Lm Ericsson (Publ) | Srns relocation in a umts network |
US20010046218A1 (en) * | 1999-12-10 | 2001-11-29 | Mauro Costa | Mobile radio telecommunications system with sychronized handover |
WO2005020618A1 (en) * | 2003-08-22 | 2005-03-03 | Lg Electronics Inc. | Mbms method and apparatus for umts network |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100456892C (en) * | 2006-10-13 | 2009-01-28 | 华为技术有限公司 | A cell multimedia broadcasting service migration method and wireless network controller |
EP2086246A1 (en) * | 2006-11-16 | 2009-08-05 | NTT DoCoMo, Inc. | Communication control device and communication control method |
EP2086246A4 (en) * | 2006-11-16 | 2013-06-19 | Ntt Docomo Inc | Communication control device and communication control method |
Also Published As
Publication number | Publication date |
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WO2005078968A8 (en) | 2006-04-06 |
EP1719269A1 (en) | 2006-11-08 |
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