CN1437367A - Multicast business realizing method in mobile network - Google Patents
Multicast business realizing method in mobile network Download PDFInfo
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Abstract
A method for realizing multicast service in mobile network. It includes the follows: setting multicast service bearing identification (MSBI) to be used for identifying the multicast service and to distribute a MSBI for each multicast service, the mobile station to carry on use registering and contracting by utilizing MSBI in order to confirm the utilized multicast service and the activation through multicast service, entering multicast group corresponded by the contracted multicast service and setting up the special multicast tunnel for this multicast service between SGSN and GGSN as well as between SGSN and RNC of the system, at last distributing the multicast service data required by the mobile station to the mobile station in multicast group corresponded with the multicast service through abovesaid tunnel by the multicast service source.
Description
Technical field
The present invention relates to the implementation method of the multicast service in the mobile communications network.
Background technology
Along with the development of broadband services, more and more stronger to the demand of multicast service, if realize that the mobile network multicast service can save a large amount of mobile network resources.Yet the multicast service that can realize in the mobile network at present can only be realized ip multicast according to the mode that realizes multicast in the fixed network with reference to the multicast protocol that carries internet protocol-based (IP:Internet Protocol) on packet switching network on mobile network.The networking of realization Internet Protocol Multicast and protocol stack are with reference to figure 2 in the mobile network.Among the figure, subscriber equipment is connected to by the ip multicast application protocol on the ip multicast application server that is positioned at external network, and external network is connected by the Gi interface with Gateway GPRS Support Node (GGSN).Externally have a functional entity to link to each other with GGSN in the GPRS network in the network, this functional entity and GGSN constitute peer layer, all will realize multicast (PIM) agreement or other multicast protocols with protocol-independent.GGSN serves as ip multicast agency's role between subscriber equipment and ip multicast application server, Serving GPRS Support Node (SGSN) be can't see on the IP layer as the part of packet domain carrying.In addition, in order to control the ip multicast application protocol, also to realize IGMP (IGMP) agreement on subscriber equipment and the GGSN.As can be seen, portable terminal is equivalent to add the main frame of multicast group from protocol stack; GGSN has realized IGMP and PIM Routing Protocol, is equivalent to support the router of multicast function; The air interface part of mobile communications network and core net part are jointly as the carrying of the packet domain bearing part among figure IP agreement.In realization, GGSN is from ip multicast application server receiving multicast traffic message, and going out according to the IP Address Recognition is cast service data, sends to a plurality of subscriber equipmenies place with the IP agreement after duplicating.But when in the packet domain bearer network, transmitting, SGSN that conductively-closed is fallen and wireless access mesh portions do not know that these data are cast service datas, therefore, even the subscriber equipment that receives data is all by same SGSN service, be positioned at same sub-district, also to use a paging channel to come the paging portable terminal separately for each user sets up a data transmission channel separately.In fact, because the message content that these portable terminals receive is identical, can finish the transmission of multi-case data fully with a data transmission channel and beep-page message by GGSN.Because each user need monopolize a data transmission channel and paging passage, therefore this multicast mode is exactly the combination of unicast service basically in mobile network inside, make and adopt this method realization Internet Protocol Multicast need ceaselessly set up and discharge data transmission channel and paging passage, so the management method of multicast users can greatly consume the mobile system resource in the prior mobile network.Therefore we can say how on the mobile network, to realize, go back neither one solution preferably for multicast service.
Summary of the invention
The object of the present invention is to provide the method that realizes multicast service among a kind of mobile network, use this method to realize that in the mobile network multicast service has higher network resource utilization and efficient.
For achieving the above object, realize the method for multicast service among the mobile network provided by the invention, comprising:
(1) multicast service bearing identification (MSBI) is set, is used to identify a multicast service;
(2) mobile network registers multicast service, for this multicast service distributes a MSBI;
(3) travelling carriage uses MSBI to carry out multicast service and uses registration and signatory, with the multicast service of determining to use;
(4) when travelling carriage needs receiving multicast traffic, the MSBI that uses the multicast service correspondence initiates service request, activates multicast service and the adding multicast group of signatory multicast service correspondence;
(5) between general grouped wireless agreement net (GPRS) service support node (SGSN) of system and GGSN (GGSN) and between SGSN and radio network controller (RNC), set up the dedicated multicast tunnel, and between wireless access network and travelling carriage, set up the Radio Link that is fit to the multicast service transmission for this multicast service;
(6) multicast service source cast service data that travelling carriage is needed is distributed to the travelling carriage in the multicast group of multicast service correspondence by above-mentioned multicast message and Radio Link.
Described method also comprises:
Set up the outside sign of multicast service bearing identification and multicast service correspondence table, be used to retrieve the MSBI sign of internal system of external business source correspondence or the corresponding external business source of MSBI sign of internal system, this table comprises following field:
The multicast service bearing identification is used to identify multicast service;
The outside sign of multicast service is used for discerning as the mobile network signature identification of the multicast service that outside multicast service source provides.
Set up multicast service bearing identification and contracted user's correspondence table, be used for the signatory situation of retrieval multicast service in the mobile network, this table comprises following field:
The multicast service bearing identification is used for the signatory multicast service of identifying user;
Contracted user's sign is used to identify contracted user.
Set up the user signing contract information table, be used for the signatory multicast service situation of retrieval user in the mobile network, this table comprises following field:
Contracted user's sign is used to identify signatory user;
The multicast service bearing identification is used for the signatory multicast service of identifying user.
Set up multicast service active information table, be used for the multicast service that inquiring user has activated, this table comprises following field:
The multicast service bearing identification is used for the multicast service that identifying user has activated;
User ID is used to identify the user who has activated multicast service.
Set up contracted user's service activation information table, be used for the reverse key as multicast service active information table, inquiring user activates the information of multicast service, and this table comprises following field:
Contracted user's sign is used to identify the user who has activated multicast service;
The multicast service sign is used to identify the multicast service that has activated.
Set up the GGSN information table, be used to write down the tunnel information that transmits multicast service between GGSN that multicast service uses and the SGSN, this table comprises following field:
Multicast service bearing identification: be used to identify the multicast service that sends the user to;
The GGSN sign is used to identify the GGSN that transmits multicast service;
Tunnel Identifier is used to identify the GGSN of the different multicast services of transmission and the tunnel between the SGSN.
Set up the SGSN information table, be used to write down the tunnel information that transmits multicast service between GGSN that multicast service uses and the SGSN, this table comprises following field:
Multicast service bearing identification: be used to identify the multicast service that sends the user to;
The SGSN sign is used to identify the SGSN that transmits multicast service;
Tunnel Identifier is used to identify the GGSN of the different multicast services of transmission and the tunnel between the SGSN.
Set up the Access Network information table, be used to write down multicast service by the tunnel information that transmits multicast service between SGSN and the RNC, this table comprises following field:
The multicast service bearing identification is used to identify the multicast service that sends the user to;
The RNC sign is used to identify the RNC that transmits multicast service;
Tunnel Identifier is used to identify transmission and does not take charge of the SGSN of multicast service and the tunnel between the RNC.
Because the present invention is provided for identifying the multicast service bearing identification (MSBI) of multicast service, MSBI of each multicast service distribution for the multicast service source, travelling carriage uses MSBI to carry out multicast service and uses registration and signatory, with the multicast service that determine to use and the activation by multicast service, the multicast group that adds signatory multicast service correspondence, between the SGSN of system and GGSN and set up the dedicated multicast tunnel for this multicast service between SGSN and RNC, the cast service data that the multicast service source needs travelling carriage is distributed to the travelling carriage in the multicast group of multicast service correspondence by above-mentioned tunnel; Adopt such scheme to realize that multicast service based on MSBI makes the present invention need not to existing network infrastructure big change and just can realize multicast service in the mobile communications network; Owing to adopt public multicast message to send cast service data to the travelling carriage in the multicast group, therefore all very high to the resource utilization of core net and air interface, can not cause existing ip multicast realize in to the waste of resource.The present invention implements simple, need not change device hardware, also can not exert an influence to existing business, realizes the expense of multicast service and cost is very low and make mobile communication system can support BroadCast MultiCast Service more flexibly.In addition, owing to used MSBI, multicast service source in the external network is shielded mobile communications network, made that mobile network is inner and GGSN is irrelevant to ip multicast address and APN (APN) address on the interface (Gi interface) of enterprise network, adapted to the continuous variation of service source.
Description of drawings
Fig. 1 is the embodiment flow chart of the inventive method;
Fig. 2 is the protocol stack reference diagram of existing realization Internet Protocol Multicast;
Fig. 3 is the Principles of Network figure that realizes the method for the invention;
Fig. 4 is a network structure of realizing the method for the invention.
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is the embodiment flow chart of the inventive method.According to Fig. 1, at first multicast service bearing identification (MSBI) is set in the 1st step, be used to identify a multicast service.
Difference according to institute's supported protocol, multicast service can be divided into two kinds, a kind of is the multicast service of supporting that the multicast service source of ip multicast agreement provides, the another kind of multicast service that just is to use other agreement beyond the ip multicast agreement such as IP unicast to come transmit traffic data can be called general multicast service.For the multicast service of supporting the ip multicast agreement, rely on multicast address to discern when in mobile communication system, transmitting, finish the implementation procedure of multicast service by the IGMP agreement, in the Access Network of mobile communications network and core net, need carry optimization process in the use at ip multicast.For general multicast service, because service source may adopt IP unicast or the addressing of home address form, system can by and service source between gateway device dispose the relevant parameter of this service source, identify this service source whether multicast service is provided, if this service source provides multicast service, then each functional entity in Access Network and the core net need be at the characteristics of multicast service, and the transmission of data is optimized.With reference to figure 3.
Usually, for the multicast service of supporting the ip multicast agreement, although can finish the signatory process that the user initiates to the multicast service source by the ip multicast address, but in mobile communication system in the actual transmissions multi-case data, also need to use the sign of the bearer network oneself that in Access Network and core net, can both discern, discern the service channel of mobile communication system in shared with the use of Access Network, core net and air interface foundation.For general multicast service, can there be several different methods to finish professional signatory process, directly in the user signing contract information database, contracts when opening an account, relevant information passed to mobile communication system after signatory or initiate that to network Signalling exchange is contracted etc. finishing on the multicast service source by user terminal by the user as the user.No matter adopt any signatory mode, the user signing contract information database of mobile communication system all needs to preserve the corresponding form of general multicast service source and multicast contracted user tabulation, to adopt the sign that to discern in Access Network and the core net simultaneously, discern the service channel of shared with the use of setting up in the mobile communication system.
By above analysis,,, need be mapped on the bearing identification among the mobile network and handle for the ip multicast address in order to optimize the utilization of Internet resources and Radio Resource; For general multicast service, because form, length and the content of its service marker is variable and uncertain, is unfavorable for mobile network's storage and searches, so also need to be mapped to the sign that a mobile network can discern.For unified this multicast service of two types, should introduce the multicast service bearing identification MSBI of a consolidation form, be used to identify a multicast service, so the present invention at first to carry out this step, multicast service bearing identification (MSBI) is set.This is identified in the mobile communication system is unique, and each functional entity in the network can be discerned this multicast service bearing identification.
In order to implement the present invention better, should preserve data table related with this multicast service bearing identification at the information database of system, for this reason, need to set up:
The outside sign of multicast service bearing identification and multicast service correspondence table, this table has comprised the information in multicast service source, be used for the MSBI sign of internal system of gateway device retrieval external business source correspondence of system or the corresponding external business source of MSBI sign of internal system, it comprises following field:
The multicast service bearing identification is used to identify multicast service;
The outside sign of multicast service is used for as being the signature identification that the mobile network discerns the multicast service that outside multicast service source provides.APN between APN address, mobile network and the multicast service source of IPv4/IPv6 multicast address that the outside sign of multicast service can be the multicast service source or IPv4/IPv6 unicast address, multicast service, mobile network's specific input end mouth etc.Gateway device such as GGSN between mobile network and the multicast service source should be able to discern this sign.
For the needs of managing, this table can also comprise the multicast service name field.With reference to following table:
| The multicast service bearing identification | The outside sign of multicast service | The multicast service title |
| MSBI 1 | Address 1 | |
| MSBI 2 | Address 2 | |
Multicast service bearing identification and contracted user's correspondence table are used in the mobile network the signatory situation of retrieval multicast service, and this table comprises following field:
The multicast service bearing identification is used for the signatory multicast service of identifying user;
Contracted user's sign is used to identify contracted user.
When multicast service is given tacit consent to all users and can be received multicast information, can not create this table, with reference to following table:
| The multicast service bearing identification | Contracted user's tabulation |
| MSBI 1 | |
| | |
| ?…… | |
| MSBI 2 | |
| | |
| ?…… |
The user signing contract information table is used for the signatory multicast service situation of retrieval user in the mobile network, and this table comprises following field:
Contracted user's sign is used to identify signatory user;
The multicast service bearing identification is used for the signatory multicast service of identifying user.With reference to following table:
| Contracted user's sign | The multicast service |
| User Identity | |
| 1 | ?MSBI 1 |
| ?MSBI 2 | |
| ?…… | |
| | ?MSBI 3 |
| ?MSBI 4 |
| …… |
Multicast service active information table is used for the multicast service that inquiring user has activated, and this table comprises following field:
The multicast service bearing identification is used for the multicast service that identifying user has activated;
User ID is used to identify the user who has activated multicast service.
With reference to following table, when all contracted users of system default activate this multicast service, can not set up this table.
| The multicast service bearing identification | User ID |
| ?MSBI 1 | User Identity 1 |
| | |
| …… | |
| ?MSBI 2 | User Identity 3 |
| | |
| …… |
Contracted user's service activation information table is used for the reverse key as multicast service active information table, and inquiring user activates the situation of multicast service, and this table comprises following field:
Contracted user's sign is used to identify the user who has activated multicast service;
The multicast service sign is used to identify the multicast service that has activated.With reference to following table:
| Contracted user's identify label | The multicast service tabulation that has activated |
| | ?MSBI 1 |
| ?MSBI 2 | |
| ?…… | |
| | ?MSBI 3 |
| ?MSBI 4 | |
| ?…… |
Need to prove that can also set up the professional un-activation information table of contracted user in the reality as required, this is shown not necessarily, but when system need distinguish the contracted user and whether activated this multicast service, this table can improve the retrieval rate of system.
Based on above-mentioned table, can carry out other steps of the present invention and in the mobile network, realize multicast service.Realize that mobile network of the present invention is with reference to figure 4.Among the figure, RNC is a radio network controller, and BSC is a base station controller, and UE is subscriber equipment, i.e. travelling carriage.
The multicast service source must at first obtain mobile network's multicast service support and registers to the mobile network before the user in the mobile network (travelling carriage) provides multicast service.Mobile Network Operator distributes a specific identifier MSBI to give corresponding multicast service, and writes down the corresponding business support information in HLR, and main contents comprise: the MSBI of distribution, the outside sign of multicast service, multicast service title etc.Therefore in step 2 of the present invention, the multicast service source is registered and is contracted, and is MSBI of each multicast service distribution of this service source.HLR can store above-mentioned data with form, promptly stores above-mentioned data with the outside label table of multicast service bearing identification and multicast service, with reference to following table: for improving managerial ability, also comprised the service parameter field in the table.
The mobile subscriber also must be to multicast service provider registration and signatory before using multicast service, and therefore in step 3, travelling carriage uses MSBI to carry out multicast service and uses registration and signatory, with the multicast service of determining to use.The signatory record of multicast service can be kept at mobile network's database such as HLR or belong in the multicast service bearing identification and multicast service outside sign correspondence table and multicast service bearing identification and contracted user's correspondence table of its assigned user server (HSS), also can be kept in the database that multicast service is derived from oneself.User's signatory verification process is finished when the user activates multicast service.When CAMEL-Subscription-Information is kept at the multicast service source, be responsible for user's the signatory authentication of multicast service by the multicast service source.When CAMEL-Subscription-Information is kept among HLR or the HSS, participate in signatory authentication by HLR or HSS.The CAMEL-Subscription-Information that HLR or HSS preserve comprises: the MSBI of multicast service, contracted user's tabulation, other CAMEL-Subscription-Information such as qos requirement etc.
The user, promptly travelling carriage can use the activation of multicast service to add the multicast group in suitable time place behind signatory multicast service, prepares the receiving multicast traffic data.Network entity such as GGSN, SGSN, RNC etc. send multicast packets according to the user record in the multicast group to the user.Therefore the present invention is in step 4, and travelling carriage carries out the activation of multicast service, to add the multicast group of signatory multicast service correspondence.For the user that guarantees to activate multicast service can be in the mobile network correct receiving multicast traffic information, all add the user record of multicast groups and should preserve in HLR.The record of multicast group should comprise: MSBI, activate the user list of multicast service.The main contents of above-mentioned information are referring to multicast service active information table and contracted user's service activation information table.
For being the mobile network of example with Fig. 4, mobilizing function and other functions for supporting multicast service need to preserve the record of relevant multicast group.Wherein:
SGSN is the ambulant functional entity of mobile network's process user, and needs are preserved the record of multicast group but only are recorded in the situation that the interior mobile subscriber of this SGSN scope adds this multicast group.For the user to the multicast group transmits multi-case data,, setting up the dedicated multicast tunnel and between SGSN and RNC, setting up the dedicated multicast tunnel for this multicast service between SGSN and the GGSN in step 5 of the present invention.The described tunnel of setting up can adopt GRPS tunnel protocol (GTP) to create GTP tunnel.SGSN utilizes this multicast service dedicated tunnel to receive the multicast packets of sending from GGSN and each RNC that is distributed to Access Network.Therefore SGSN should store following data: multicast bearing identification MSBI, activate this multicast service subscriber's meter, support to transmit between GGSN information, GGSN and the SGSN of this multicast service the dedicated tunnel information of this multicast service, SGSN transmits the dedicated tunnel information of cast service data bag etc. between distributing information, SGSN and the RNC of RNC distribution multicast packets.For preserving above-mentioned information, the present invention also needs to set up following tables of data:
The GGSN information table is used to write down the tunnel information that transmits multicast service between GGSN that multicast service uses and the SGSN, and this table comprises following field:
Multicast service bearing identification: be used to identify the multicast service that sends the user to;
The GGSN sign is used to identify the GGSN that transmits multicast service;
Tunnel Identifier is used to identify the GGSN of the different multicast services of transmission and the tunnel between the SGSN.With reference to following table:
The SGSN information table is used to write down the tunnel information that transmits multicast service between GGSN that multicast service uses and the SGSN, and this table comprises following field:
Multicast service bearing identification: be used to identify the multicast service that sends the user to;
The SGSN sign is used to identify the SGSN that transmits multicast service;
Tunnel Identifier is used to identify the GGSN of the different multicast services of transmission and the tunnel between the SGSN.With reference to following table:
The Access Network information table is used to write down multicast service by the tunnel information that transmits multicast service between SGSN and the RNC, and this table comprises following field:
The multicast service bearing identification is used to identify the multicast service that sends the user to;
The RNC sign is used to identify the RNC that transmits multicast service;
Tunnel Identifier is used to identify the SGSN of the different multicast services of transmission and the tunnel between the RNC.With reference to following table:
In addition, also need to adopt multicast service active information table to use, to understand mobile subscriber's distribution situation as user's statistical form.
GGSN is as gateway device, is responsible for from multicast service source receiving multicast traffic packet and is distributed to SGSN.GGSN should preserve the corresponding relation of following information: MSBI and multicast service, GGSN distributes information from the dedicated tunnel of the transmission multicast multicast service of setting up between distributing information, GGSN and the SGSN of multicast service to SGSN.The main contents of above-mentioned information are referring to multicast service bearing identification and service source correspondence table and SGSN information table.
Access Network is responsible for receiving multi-case data from SGSN, and by Radio Link multicast packets is sent to the mobile subscriber.For supporting SGSN by the function of multicast service dedicated tunnel to RNC distribution multi-case data, SGSN should preserve the relevant information of the multicast service dedicated tunnel between SGSN and the GGSN, and main contents are referring to the SGSN information table.Simultaneously for optimizing the support of air wireless interface to multicast service, Access Network also can be added up the distributed intelligence of mobile subscriber in Access Network, statistics mobile subscriber each sub-district in Access Network, user's distribution situation in URA (user registration area User Registration Area) district or the route district.When more as 2 users of mobile subscriber's number in certain sub-district of receiving multicast traffic, can set up the broadcast or multicast channel; When the user more after a little while, can transmit multi-case data for the user sets up special-purpose air traffic channel.Multicast users can at this moment, preferably increase " sub-district " field that is used for the identifying user sub-district referring to the multicast service active information table as user profile table in the main contents of the distributed intelligence of Access Network in the table, with reference to following table:
The user activates multicast service can dual mode: initiate multicast service to the mobile network and activate request and initiate multicast service activation request to the multicast service source.Specifically, when the record of the signatory multicast service of travelling carriage was stored in the attaching position register (HLR) of system, described step (4) and step (5) further activated the step replacement with the multicast service that comprises the steps:
(A1) travelling carriage sends multicast service to SGSN and activates request message, and this message comprises the identify label of MSBI, travelling carriage, as the mobile identify label in world parameters such as (IMSI);
(A2) SGSN sends to HLR and adds new multicast users request message, and this message parameter comprises: parameters such as MSBI, IMSI;
(A3) HLR is by multicast service bearing identification and contracted user's correspondence table or user signing contract information table inquiry multicast service CAMEL-Subscription-Information, check whether the user has the right to use this multicast service, if the user is signatory, then HLR is in the subscriber's meter of multicast group, promptly in multicast service active information table or contracted user's service activation information table, add User Identity, and return the new multicast users response message of adding;
(A4) SGSN upgrades multicast group information, be that SGSN inserts new multicast group user record in local user's statistical form, when the dedicated tunnel also do not set up for MSBI between SGSN and the GGSN, SGSN sets up request message to GGSN initiation packet datagram protocol context (PDP context), message parameter comprises: MSBI, service quality (QoS) etc., for MSBI sets up SGSN to the GTP tunnel between the GGSN;
(A5) GGSN is that MSBI configures special-purpose GTP tunnel, inserts relative recording and return PDP context foundation response to SGSN in the SGSN information table;
(A6) the outside label table of the multicast service bearing identification of GGSN inquiry HLR and multicast service obtains the service source information that MSBI represents, and as APN, QoS etc., and upgrades local information;
(A7) SGSN upgrades the record of local special-purpose GTP tunnel, promptly upgrade the GGSN information table, and notice Access Network, the mobile subscriber has activated multicast service MSBI and has joined the multicast group, when not setting up the special-purpose GTP tunnel of transmission MSBI between Access Network and the SGSN, set up the transmission tunnel of special use for the MSBI of this multicast service, and upgrade content in original SGSN information table and the Access Network information table, Access Network disposes suitable radio channel resource according to the user distribution situation of user profile table to the user; When the user who receives this MSBI multicast service is a lot, Access Network can configuration broadcast or Multicast Channel use to multicast users; As the user who receives this MSBI multicast service seldom the time, can assigned with dedicated channel;
(A9) SGSN sends the multicast service activation to travelling carriage and finishes message, confirms that the user has joined the multicast group.
When the record of the signatory multicast service of travelling carriage was stored in service source, described step (4) and step (5) further activated step with the multicast service that comprises the steps and replace:
(B1) user adopts the multicast protocol of internet protocol-based (IP) to send IGMP (IGMP) message to GGSN, requires to add the ip multicast group in an external IP multicast service source;
Whether (B2) GGSN transmits the request that adds the multicast group to the Internet Protocol Multicast source, and signatory by Internet Protocol Multicast source inspection user, and returns confirmation to GGSN;
(B3) GGSN as APN, QoS etc., and upgrades local information by MSBI and relevant information that HLR inquires about this Internet Protocol Multicast by multicast service bearing identification and the outside label table of multicast service;
(B4) GGSN sends multicast service to SGSN and activates request message, and the indication user has added the ip multicast group, and message parameter comprises: the QoS of MSBI, user ID IMSI and multicast service etc.;
(B5) SGSN upgrades local multicast group user record, be that SGSN inserts new multicast group user record in local user's statistical form, and check and whether set up SGSN to the special-purpose GTP tunnel that is used for MSBI between the GGSN, if this tunnel is not set up, then transmit the GTP tunnel of MSBI to foundation between the GGSN at SGSN, send multicast service to GGSN simultaneously and activate response, SGSN should upgrade the data of local GGSN information table, and GGSN should upgrade the data of local SGSN information table;
(B6) SGSN sends to HLR and adds new multicast users request message, upgrades the record of the multicast group among the HLR, preserves user's multicast active information, and the parameter that adds in the new multicast users request message comprises MSBI, IMSI etc.;
(B7) HLR adds the user ID of access customer in multicast group information, promptly adds the sign of access customer at multicast service active information table and contracted user's service activation information table, and returns the new multicast users response message of adding;
(B8) SGSN upgrades the record of special-purpose GTP tunnel in the local GGSN information table, and notice Access Network, the mobile subscriber has activated multicast service MSBI and has joined the multicast group, when not setting up the special-purpose GTP tunnel of transmission MSBI between Access Network and the SGSN, for the MSBI of this multicast service sets up the transmission tunnel of special use, and the Access Network information table among the renewal SGSN and the content of ASGSN information table.Access Network disposes suitable radio channel resource according to the user distribution situation of user profile table to the user, when the user who receives this MSBI multicast service is a lot, Access Network can configuration broadcast or Multicast Channel use to multicast users; As the user who receives this MSBI multicast service seldom the time, can assigned with dedicated channel;
(B9) SGSN sends the multicast service activation to the user and finishes message, confirms that the user has joined the multicast group.
In step 6, the cast service data that the multicast service source needs travelling carriage is distributed to the travelling carriage in the multicast group of multicast service correspondence by above-mentioned tunnel.In this step, service source sends to the mobile network with cast service data, is distributed to rational resource and transmission path by network and activates the user that multicast service has added the multicast group.The following step of concrete distribution procedure reference of cast service data:
(C1) the multicast service source sends the cast service data bag to GGSN;
(C2) GGSN searches the corresponding MSBI of multicast service by the multicast service bearing identification of this locality with the outside label table of multicast service, and search the special-purpose GTP tunnel of GGSN to SGSN distribution multi-case data according to the SGSN information table, by this tunnel packet is sent to each SGSN;
(C3) when also not setting up Radio Link between travelling carriage and the SGSN, SGSN sends the beep-page message that comprises the MSBI parameter by MSBI to travelling carriage, to activate the user of MSBI business;
Mobile subscriber's response of the multicast service that (C4) is activated comprises the isoparametric beep-page message of MSBI, IMSI;
(C5) SGSN inquires about local multicast group by user profile table, confirm that whether the user has the right to use this multicast service and activated multicast service, is established as the transmission cast service data dedicated transmissions link that MSBI sets up simultaneously between Radio Network System (RNS) or base station system (BSS) and SGSN;
(C6) RNS is based upon the Radio Link of aerial transmission cast service data, SGSN sends the cast service data bag by the user of Radio Link in the multicast group who has set up, when the user who receives this MSBI multicast service is a lot, Access Network can configuration broadcast or Multicast Channel use to multicast users; As the user who receives this MSBI multicast service seldom the time, can assigned with dedicated channel.
From the above, the use of the MSBI of the present invention's proposition has following characteristics:
1, MSBI distributes to corresponding multicast service according to mobile communication system, and the unique identification that uses in mobile communication system.Each MSBI correspondence one type multicast service, and in use, the user of every certain multicast service of having contracted just is assigned with the MSBI that uses corresponding this multicast service.
2, MSBI divides at business and uses, so a MSBI can be used jointly by a plurality of contracted users, as the unique identification of multicast service, is used for the paging of multicast service.In order to correspond on each user, user's uniqueness sign and MSBI need be associated simultaneously.
3, consider from safety perspective, take into account the saving of resource on the air interface simultaneously, the restriction MSBI use on the interface aloft can adopt interim multicast service group id TMGI (the interim multicast group id of TemeraryMulticast Group Identification) to replace MSBI to carry out paging and Signalling exchange on the interface aloft.TMGI, is used for identifying this multicast service on the interface aloft in certain geographical coverage and effective in the regular hour by the inner interim distribution of mobile communication system.
4, when customer location changes, can adopt processes such as existing mobility management process switches, roaming.Because it is unique that MSBI is the whole network, so the uniqueness and the professional continuity that provides of multicast service can be provided.
5, when setting up the data transmission channel of Access Network, core net and air interface, can set up according to MSBI, owing to be at passage professional rather than that set up at the user, so can realize sharing of transmission channel.
6, when not having multicast users to exist, still can use MSBI to carry out paging or broadcasting, invite the user to add multicast group.
7, value that can more pre-defined specific MSBI is represented some nonvolatil multicast services.
In a word, by using special MSBI to represent multicast service, existing network configuration is not needed to do too big change, only need on each equipment, to increase identifying to the MSBI of sign multicast service, increase processing then to these special-purpose MSBI, can realize the transmission of data, and can not cause waste, also can not impact existing business to Internet resources and air interface resource from any to multiple spot.
Although it may be noted that above explanation at last is that example is carried out with the multicast service, be to use MBSI can realize broadcasting service equally.When multicast service is given tacit consent to all users and can be received multicast information, be exactly the function that has realized broadcasting service in fact, so when MBSI is used to realize broadcasting service, only need the use of the various forms in each functional entity to be simplified, just can realize broadcasting service flexibly according to describing.
Claims (14)
1, realize the method for multicast service among a kind of mobile network, comprising:
(1) multicast service bearing identification (MSBI) is set, is used to identify a multicast service;
(2) mobile network registers multicast service, for this multicast service distributes a MSBI;
(3) travelling carriage uses MSBI to carry out multicast service and uses registration and signatory, with the multicast service of determining to use;
(4) when travelling carriage needs receiving multicast traffic, the MSBI that uses the multicast service correspondence initiates service request, activates multicast service and the adding multicast group of signatory multicast service correspondence;
(5) between general grouped wireless agreement net (GPRS) service support node (SGSN) of system and GGSN (GGSN) and between SGSN and radio network controller (RNC), set up the dedicated multicast tunnel, and between wireless access network and travelling carriage, set up the Radio Link that is fit to the multicast service transmission for this multicast service;
(6) multicast service source cast service data that travelling carriage is needed is distributed to the travelling carriage in the multicast group of multicast service correspondence by above-mentioned multicast message and Radio Link.
2, realize the method for multicast service among the mobile network according to claim 1, it is characterized in that described method comprises sets up the outside sign of multicast service bearing identification and multicast service correspondence table, be used to retrieve the multicast service that the corresponding external business source of MSBI sign of the MSBI sign of internal system of the multicast service correspondence that the external business source provides or internal system provides, this table comprises following field:
The multicast service bearing identification is used to identify multicast service;
The outside sign of multicast service is used for discerning as the mobile network signature identification of the multicast service that outside multicast service source provides.
3, realize the method for multicast service among the mobile network according to claim 1, it is characterized in that described method comprises sets up multicast service bearing identification and contracted user's correspondence table, be used for the signatory situation of retrieval multicast service in the mobile network, this table comprises following field:
The multicast service bearing identification is used for the signatory multicast service of identifying user;
Contracted user's sign is used to identify contracted user.
4, realize the method for multicast service among the mobile network according to claim 1, it is characterized in that described method comprises to set up the user signing contract information table that be used for the signatory multicast service situation of retrieval user in the mobile network, this table comprises following field:
Contracted user's sign is used to identify signatory user;
The multicast service bearing identification is used for the signatory multicast service of identifying user.
5, realize the method for multicast service among the mobile network according to claim 1, it is characterized in that described method comprises to set up multicast service active information table that be used for the multicast service that inquiring user has activated, this table comprises following field:
The multicast service bearing identification is used for the multicast service that identifying user has activated;
User ID is used to identify the user who has activated multicast service.
6, realize the method for multicast service among the mobile network according to claim 1, it is characterized in that described method comprises sets up contracted user's service activation information table, be used for reverse key as multicast service active information table, inquiring user activates the information of multicast service, and this table comprises following field:
Contracted user's sign is used to identify the user who has activated multicast service;
The multicast service sign is used to identify the multicast service that has activated.
7, realize the method for multicast service among the mobile network according to claim 1, it is characterized in that described method comprises sets up the GGSN information table, be used to write down the tunnel information that transmits multicast service between GGSN that multicast service uses and the SGSN, this table comprises following field:
Multicast service bearing identification: be used to identify the multicast service that sends the user to;
The GGSN sign is used to identify the GGSN that transmits multicast service;
Tunnel Identifier is used to identify the GGSN of the different multicast services of transmission and the tunnel between the SGSN.
8, realize the method for multicast service among the mobile network according to claim 1, it is characterized in that described method comprises sets up the SGSN information table, be used to write down the tunnel information that transmits multicast service between GGSN that multicast service uses and the SGSN, this table comprises following field:
Multicast service bearing identification: be used to identify the multicast service that sends the user to;
The SGSN sign is used to identify the SGSN that transmits multicast service;
Tunnel Identifier is used to identify the GGSN of the different multicast services of transmission and the tunnel between the SGSN.
9, realize the method for multicast service among the mobile network according to claim 1, it is characterized in that described method comprises sets up the Access Network information table, be used to write down multicast service by the tunnel information that transmits multicast service between SGSN and the RNC, this table comprises following field:
The multicast service bearing identification is used to identify the multicast service that sends the user to;
The RNC sign is used to identify the RNC that transmits multicast service;
Tunnel Identifier is used to identify the SGSN of the different multicast services of transmission and the tunnel between the RNC.
10, realize the method for multicast service among the mobile network according to claim 1, it is characterized in that described method comprises: according to the difference of multicast service institute supported protocol, multicast service is divided into the multicast service of supporting the ip multicast agreement and the multicast service of supporting ip multicast agreement other agreement in addition, so that the transmission of multicast service is optimized.
11, realize the method for multicast service among the mobile network according to claim 1, it is characterized in that: GTP tunnel is created for adopting GRPS tunnel protocol (GTP) in the described tunnel of setting up.
12, realize the method for multicast service among the mobile network according to claim 1, when it is characterized in that record when the signatory multicast service of travelling carriage is stored in the attaching position register (HLR) of system, described step (4) and step (5) further comprise the steps:
(A1) travelling carriage sends multicast service to SGSN and activates request message, and this message comprises the parameters such as identify label of MSBI, travelling carriage;
(A2) SGSN sends to HLR and adds new multicast users request message, and this message parameter comprises: parameters such as MSBI, IMSI;
(A3) HLR inquiry multicast service CAMEL-Subscription-Information checks whether the user has the right to use this multicast service, if the user is signatory, then HLR adds User Identity in the multicast group, and returns the new multicast users response message of adding;
(A4) SGSN upgrades multicast group information, and when the dedicated tunnel also do not set up for MSBI between SGSN and the GGSN, SGSN sets up to GGSN initiation packet datagram protocol context (PDPcontext) and asks, for MSBI sets up SGSN to the GTP tunnel between the GGSN;
(A5) GGSN is that MSBI configures special-purpose GTP tunnel, and returns PDPcontext to SGSN and set up response;
(A6) GGSN inquiry HLR obtains the service source information of MSBI representative and upgrades local information;
(A7) SGSN upgrades the record of local special-purpose GTP tunnel, and notice Access Network, the mobile subscriber has activated multicast service MSBI and has joined the multicast group, when not setting up the special-purpose GTP tunnel of transmission MSBI between Access Network and the SGSN, set up the transmission tunnel of special use for the MSBI of this multicast service, and upgrading original tunnel information, Access Network disposes suitable radio channel resource according to user's distribution situation to the user;
(A9) SGSN sends the multicast service activation to travelling carriage and finishes message, confirms that the user has joined the multicast group.
13, realize the method for multicast service among the mobile network according to claim 1, it is characterized in that: when the record of the signatory multicast service of travelling carriage was stored in service source, described step (4) and step (5) further comprised the steps:
(B1) user adopts the multicast protocol of internet protocol-based (IP) to send IGMP (IGMP) message to GGSN, requires to add the ip multicast group in an external IP multicast service source;
Whether (B2) GGSN transmits the request that adds the multicast group to the Internet Protocol Multicast source, and signatory by Internet Protocol Multicast source inspection user, and returns confirmation to GGSN;
(B3) the GGSN MSBI and the relevant information of inquiring about this Internet Protocol Multicast by HLR, and upgrade local information;
(B4) GGSN sends multicast service to SGSN and activates request, and the indication user has added the ip multicast group;
(B5) SGSN upgrades local multicast group user record, and check and whether set up SGSN to the special-purpose GTP tunnel that is used for MSBI between the GGSN, if this tunnel is not set up, then, send the multicast service activation to GGSN simultaneously and respond at the GTP tunnel of SGSN to foundation transmission MSBI between the GGSN;
(B6) SGSN sends to HLR and adds new multicast users request, upgrades the record of the multicast group among the HLR, preserves user's multicast active information;
(B7) HLR adds the user ID of access customer in multicast group information, and returns the new multicast users response message of adding;
(B8) SGSN upgrades the record of local special-purpose GTP tunnel, and notice Access Network, the mobile subscriber has activated multicast service MSBI and has joined the multicast group, when not setting up the special-purpose GTP tunnel of transmission MSBI between Access Network and the SGSN, set up the transmission tunnel of special use for the MSBI of this multicast service, Access Network disposes suitable radio channel resource according to user's distribution situation to the user;
(B9) SGSN sends the multicast service activation to the user and finishes message, confirms that the user has joined the multicast group.
14, realize the method for multicast service among the mobile network according to claim 1, it is characterized in that described step (6) further comprises the steps:
(C1) the multicast service source sends the cast service data bag to GGSN;
(C2) GGSN searches the MSBI of multicast service correspondence, and searches the special-purpose GTP tunnel of GGSN to SGSN distribution multi-case data, by this tunnel packet is sent to each SGSN;
(C3) when also not setting up Radio Link between travelling carriage and the SGSN, SGSN sends out beep-page message by MSBI to travelling carriage, to activate the user of MSBI business;
The mobile subscriber of the multicast service that (C4) is activated responds beep-page message;
(C5) SGSN inquires about local multicast group, confirm that whether the user has the right to use this multicast service and activated multicast service, is established as the transmission cast service data dedicated transmissions link that MSBI sets up simultaneously between Radio Network System (RNS) or base station system (BSS) and SGSN;
(C6) RNS is based upon the Radio Link of aerial transmission cast service data, and SGSN sends the cast service data bag by the user of Radio Link in the multicast group who has set up.
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