CN101335907B

CN101335907B - Method and apparatus for controlling multicast service transmission in base station

Info

Publication number: CN101335907B
Application number: CN2007100431816A
Authority: CN
Inventors: 温海波; 刘继民
Original assignee: Alcatel Lucent Shanghai Bell Co Ltd
Current assignee: Nokia Shanghai Bell Co Ltd
Priority date: 2007-06-29
Filing date: 2007-06-29
Publication date: 2011-04-06
Anticipated expiration: 2027-06-29
Also published as: CN101335907A

Abstract

The invention proposes a resolving scheme of controlling multicast service transmission in base station in wireless communication network. The base station, according to the service identification of the multicast service received by the user terminal request, judges whether the multicast service has been distributed with resource identification, if so, informing the resource identification to the user terminal, so that the user terminal can receive the multicast service on the wireless resource identified by the resource identification; otherwise, distributing a resource identification to the multicast functional distribution, informing the user terminal, and transmitting a multicast adding request message requesting for a multicast service to an superior level network device in order to apply a corresponding multicast service to the base station. When the base station receives the multicast service transmitted by the superior level network device, the base station conveys the multicast service on the wireless resource identified by the allocated resource identification.

Description

Be used to control method and the device that multicast service sends in the base station

Technical field

The present invention relates to the base station in the cordless communication network, relate in particular to the control multicast service sends in the base station method and device.

Background technology

Multicast service has extensively been carried out in the fixed network of Virtual network operator and wireless network as very promising value-added service.Expansion along with BRAN, increasing multicast service will be applied in WiMAX (World Interoperability for Microwave Access, WiMax network, WorldInteroperability for Microwave Access) network and fixed mobile convergence network.In fixed network, as far as possible in the near network equipment of user network, carrying out duplicating and distributing of multicast packet to reduce the consumption of the network bandwidth.And in each network equipment, do not need manual configuration, the IP multicast packet just can automatically be mapped as MAC layer multicast packet.

In the WiMAX Access Network, come bear multicast/broadcasting service (MBS, Multicast Broadcast Service) by public wireless connections.IEEE802.16e has defined two kinds of multicast/broadcast service access modes: single base station is inserted and many base stations are inserted.Single base station access way is that the multicast/broadcast business is independently carried out in each BS, and wireless connections sign (CID, Connection Identifier) user to all in the base station of bear multicast/broadcasting service is identical.But be not defined in the automatic mapping relations that how to realize in the base station between IP multicast packet and the wireless connections sign among the IEEE802.16e, do not provide further solution yet.

Many base stations access way is formed a multicast/broadcast service area (MBSZone) by one group of base station, in same multicast/broadcast service area, each base station synchronization sends multicast/broadcast business, with same connection identifier with and qos parameter come bear multicast/broadcasting service.User terminal obtains the information of multicast/broadcast service area from the broadcast message of base station.At present, the provide support solution of above-mentioned many base stations incoming multicast/broadcasting service of existing network equipment manufacturer (as Alcatel company), as shown in Figure 1.In WiMAX network of network topological structure shown in Figure 1, each access service network gateway (ASN-GW, AccessService Network Gateway is hereinafter to be referred as " IAD ") linchpin has a plurality of base stations, IAD and connectivity serving network (CSN, Connectivity Service Network) link to each other, multicast server is arranged in connectivity serving network.Can comprise the base station that a plurality of IADs and IAD are had jurisdiction among the MBS zone, IAD realizes that (IGMP, Internet Group Management Protocol are used for IPv4 to IGMP/MLD proxy; MLD, multicast listener discovery protocol is used for IPv6) function, be that static configuration is in IAD or by being arranged in certain network equipment centralized management of connectivity serving network for the mapping relations of connection identifier and multicast IP data bag.In a multicast/broadcast service area, as long as wherein there is a user terminal requests to receive certain multicast service, all base stations in this multicast/broadcast service area all send this multicast service.

Because the user is to the normally dynamic change of the demand of multicast service, the shortcoming of above-mentioned many base stations access way is a underaction; The static configuration connection identifier carries out the transmission of multicast service, causes the utilance of connection identifier lower, and the base station can not freely be shone upon multicast service and connection identifier; Promptly be not have the user terminal receiving multicast business below certain base station, to this base station group business stream is arranged still from IAD, the base station also will send this group business stream, thereby has wasted from IAD to the bandwidth this base station and the Radio Resource of base station.Because the Radio Resource of base station is limited, thereby also limited the quantity of multicast service in the multicast/broadcast service area; Because IGMP/MLD proxy function realizes in IAD, the multicast control signaling between from the base station to the IAD is more; The multicast of the user terminal receiving multicast business message that joins request need send to and just can meet with a response after the IAD, has certain delay.

Summary of the invention

The present invention has proposed a kind of solution that multicast service sends that is used to control in order to solve above-mentioned shortcoming of the prior art in wireless communication network base station.The base station is according to the service identification of the multicast service of user terminal requests reception, judge whether to have distributed resource identification for this multicast service, if resource identification has been distributed for this multicast service in the base station, then notify this user terminal, so that this user terminal receives described multicast service on the Radio Resource that this resource identification identified with this resource identification.If the multicast service Resources allocation that does not receive for user terminal requests identifies as yet, then distribute a resource identification for this multicast service, notify this user terminal, and the request that the sends multicast that receives this multicast service message that joins request is delivered to base station with application with corresponding multicast service to the upper level network equipment.When the base station receives the multicast service that transmits via the upper level network equipment, then on the Radio Resource that resource identification identified of described distribution, transmit this multicast service.

According to a first aspect of the invention, a kind of method that multicast service sends that is used to control in wireless communication network base station is provided, wherein, may further comprise the steps: a. determines and the corresponding resource identification of this multicast service according to the service identification of the multicast service of user terminal requests reception; B. notify described user terminal with described resource identification; Wherein, on the Radio Resource that described resource identification identified, transmit the described multicast service that receives via the transmission of the upper level network equipment.

According to a second aspect of the invention, a kind of multicast control device that multicast service sends that is used to control in wireless communication network base station is provided, wherein, comprise: first determines device, be used for service identification, determine and the corresponding resource identification of this multicast service according to the multicast service of user terminal requests reception; First notifying device is used for notifying described user terminal with described resource identification; Professional conveyer transmits the described multicast service via the transmission of the upper level network equipment that receives on the Radio Resource that is used for identifying at described resource identification.

The control multicast service sends in the base station method and multicast control device that the application of the invention provides, the network bandwidth resources between having saved effectively from the IAD to the base station and the Radio Resource of base station; The multicast that the base station in time the responds user terminal message that joins request has reduced stand-by period of user terminal; The base station independently distributes connection identifier to be used for the transmission of multicast service according to the multicast of the user terminal message that joins request, and sets up from the mapping relations between IP multicast service and the connection identifier, has effectively utilized the Radio Resource of base station.

Description of drawings

By reading the following detailed description of non-limiting example being done with reference to accompanying drawing, it is more obvious that other features, objects and advantages of the present invention will become.

Fig. 1 is the network topology structure schematic diagram in the multicast/broadcast district of WiMAX network in the prior art;

Fig. 2 is the systems approach schematic flow sheet that sends according to a specific embodiment of the present invention control multicast service;

Fig. 3 is for being used to control the method flow diagram that multicast service sends in wireless communication network base station according to a specific embodiment of the present invention;

Fig. 4 is for being used for method flow diagram definite and the corresponding resource identification of multicast service in wireless communication network base station according to a specific embodiment of the present invention;

Fig. 5 is for to be used for the method flow diagram that the process user terminal withdraws from multicast service according to a specific embodiment of the present invention in wireless communication network base station;

Method flow diagram when Fig. 6 does not have the user terminal receiving multicast business for being used to handle according to a specific embodiment of the present invention in wireless communication network base station;

Fig. 7 is for being used to control the multicast control device structured flowchart that multicast service sends in wireless communication network base station according to a specific embodiment of the present invention.

In the accompanying drawings, identical with similar Reference numeral is represented same or analogous device or method step.

Embodiment

For a better understanding of the present invention, below the related content in the WiMAX cordless communication network related in the specific embodiment of the present invention is simply introduced.

The MAC layer of WiMAX is connection-oriented.For respective services being provided to user terminal and guaranteeing various QoS, all data communication are undertaken by connection.The MAC layer realizes that the principle of QoS is that the bag by the MAC transmission is mapped to Business Stream, and is mapped in the connection that is identified by connection identifier, dispatches according to the qos parameter that Business Stream provides, and ensures the QoS characteristic of MAC.

Traffic stream identifier (SFID, Service Flow Identifier) is used for the different business stream that marked network has been created, and a Business Stream has a traffic stream identifier at least.In registration process, the base station is traffic stream identifier of every traffic flow assignment of register requirement; Increase in (DSA, Dynamic Service Addition) process at dynamic service in addition, the base station is the traffic stream identifier of every traffic flow assignment that dynamically increases.Distributed the Business Stream of traffic stream identifier not admitted immediately or to activate, assigned state and only be in.The Business Stream dynamic management uses traffic stream identifier to come the unique identification Business Stream.

Connection identifier is used for the Business Stream that marked network has been admitted, in registration and dynamic service increase process, and the traffic flow assignment connection identifier of base station for being admitted.Be positioned at the running time-frequency resource information that the downlink map information (DL-MAP) of physical frame front portion and uplink map information (UL-MAP) comprise connection identifier that Uplink/Downlink uses and the wireless channel corresponding with connection identifier, user terminal will receive and send data/managing signaling according to the indication of last/descending map information.When sending or receiving data/managing signaling, user terminal at first obtains the Uplink/Downlink map information, then according to running time-frequency resource information transmission/reception data on this corresponding running time-frequency resource of each professional connection identifier correspondence wherein.Connection identifier is divided into basic connection identifier, main connection identifier, transmission connection identifier etc. particularly again, wherein, the number range of transmission connection identifier is between 2m+1 to 0xFEFE, here m is a positive integer, can set in advance by the network manager, the more detailed information of relevant connection identifier can be with reference to relevant criterion such as IEEE802.16d or IEEE802.16e, and the present invention repeats no more here.

Business Stream can dynamically increase, change or delete by MAC.Dynamically be meant in these communication processs that operate in user terminal and base station and carry out, rather than before communication, set up.The dynamic service flow increase can be initiated by base station or user terminal.The dynamic service of being initiated by the base station increases the SFID that request (DSA-REQ) message will comprise a up link or downlink traffic stream, also comprises the connection identifier related with it and one group of qos parameter of having admitted or having activated.

All Business Streams can be deleted by dynamic service deletion (DSD, Dynamic Service Deletion) process that base station or user terminal are initiated, and certain Business Stream is in a single day deleted, and relative all resources all discharge.Usually, dynamic service deletion request message (DSD-REQ) is specified the Business Stream that will delete with traffic stream identifier.

More than just the related content in the WiMAX cordless communication network related among the present invention is simply introduced, detailed situation can be further with reference to IEEE802.16d and IEEE802.16e standard.

Basic thought of the present invention is the transmission of being controlled multicast service by the base station, multicast service Resources allocation sign is come dynamically to be based on the service identification of the multicast service that user terminal requests receives in the base station, and carries out the transmission of multicast service so that user terminal receives this multicast service on the Radio Resource that this resource identification identified.For the situation that multicast service carries with the IP packet, the function of IGMP/MLD proxy is also realized in the base station.For the user terminal of operation IPv4 agreement, the multicast message that joins request is the IGMP report message, and for the user terminal of operation IPv6 agreement, the multicast message that joins request is the MLD report message.

The multicast that the base station receives certain user terminal join request behind the notification message of message or adjacent base station (service identification that the user terminal that this notification message is used for switching to this region within the jurisdiction, base station from this adjacent base station region within the jurisdiction is asked the multicast service that receives), according to the join request service identification of the multicast service that the user terminal requests that comprises in message or the notification message receives of this multicast, as IP multicast address, perhaps domain name, perhaps sign that other can this multicast service of unique identification etc., judge whether that the multicast service Resources allocation of having asked to receive for this user terminal identifies to be used for the transmission of this multicast service, judges promptly whether the base station has added the multicast group of this multicast service correspondence.

If resource identification has been distributed for this multicast service in the base station, show that promptly the base station carried out the transmission of this multicast service on the Radio Resource that this resource identification identified, or the base station has added the multicast group of this multicast service correspondence, then the resource identification that will distribute for this multicast service is before this notified this user terminal, so that this user terminal receives described multicast service on the Radio Resource that this resource identification identified.

If the multicast service Resources allocation sign that the base station does not receive for user terminal requests as yet, then distribute a resource identification for this multicast service, notify this user terminal with this resource identification, and the request that the sends multicast that receives this multicast service message that joins request is delivered to base station with application with corresponding multicast service to the upper level network equipment.When the base station receives the multicast service that transmits via the upper level network equipment, then distribute the Radio Resource that identifies by described resource identification to transmit this multicast service.

When user terminal requests stops to receive certain multicast service or withdraws from the multicast group of multicast service correspondence, send multicast and withdraw from request message to the base station, request message is withdrawed from according to multicast in the base station, and informing user terminal stops at and receives this multicast service on the Radio Resource that resource identification identified that distributes for this multicast service.When the situation that multi-cast business data carries with the IP packet, for IPv4, it is IGMP leave message that this multicast withdraws from request message; For IPv6, it is Multicast Listener Done message that this multicast withdraws from request message.

For the WiMAX cordless communication network, described resource identification is connection identifier.The base station by and user terminal between connect the connection identifier informing user terminal.The two kinds of situations that are assigned for the traffic stream identifier of multicast service: a kind of is static configuration, and another kind is a dynamic assignment.

The situation of static configuration is as follows: store each multicast service corresponding service flow identification information in the base station in advance.For example, for the situation that multicast service identifies with multicast address, promptly store the correspondence relationship information between multicast address and the traffic stream identifier in advance.Generally each business information of carrying out in the network and each professional corresponding service flow identification information and relevant qos parameter are configured in the network equipment by the network manager, then, each base station communication in this network equipment and the network is notified each business and each professional corresponding service flow identification information and relevant qos parameter of carrying out in each base station network.

The base station is receiving multicast from user terminal when joining request message, according to multicast address wherein, determine its corresponding service traffic identifier, when if the multicast service of this user terminal requests reception is not also transmitted in the base station, connection identifier is then distributed for this multicast service in the base station, the base station sends dynamic service then increases request (Dynamic Service Addition Request, DSA-REQ) message is given user terminal, comprise the traffic stream identifier (SFID) that distributes this multicast service, connection identifier and one group of qos parameter of having admitted or having activated in this dynamic service increase request message.After user terminal is received dynamic service request to create message, send dynamic service and increase service response message (Dynamic Service Addition Response, DSA-RSP) inform the result of this service request of base station, after the base station receives that dynamic service increases response message, (Dynamic Service Addition Acknowledge DSA-ACK) gives user terminal to send dynamic service increase acknowledge message.Connection between base station and the user terminal has just been set up like this.

The situation of dynamic-configuration is as follows: the base station is receiving join request message or during from the service identification notification message of adjacent base station of multicast from user terminal, if the base station also is not this multicast service distribution service traffic identifier and connection identifier, be this multicast service distribution service traffic identifier and corresponding qos parameter and connection identifier.Increase process with the connection identifier informing user terminal by above-mentioned dynamic service then.

The base station is after receiving the multicast service that transmits via the upper level network equipment, and the running time-frequency resource that just distributes the connection identifier by this multicast service correspondence to identify transmits this multicast service on this running time-frequency resource.User terminal just comes receiving multicast business on this running time-frequency resource.Be that user terminal is after receiving the DL-MAP information of each downlink frame, therein, correlation reception information such as the connection identifier of search multicast service correspondence and running time-frequency resource information thereof and modulation system, code/decode format, receiving multicast business on the running time-frequency resource of multicast service correspondence then.

The base station by with user terminal between Business Stream delete procedure or be connected demolishing process and come informing user terminal to stop receiving multicast business.The base station sends dynamic service removal request (Dynamic Service Deletion Request) message and gives user terminal, comprises the information such as traffic stream identifier of the multicast service that will delete in this dynamic service deletion request message.When user terminal receives this dynamic service deletion request message, send a dynamic service removal request response (Dynamic Service Addition Response, DSA-RSP) message is given the base station, and stops at receiving multicast business on the Radio Resource that connection identifier identified of this traffic stream identifier correspondence.

Can safeguard in the base station that a multicast service transmits, these each clauses and subclauses of transmitting comprise the service identification of multicast service, are the resource identification that this multicast service distributes, and receive the sign of the user terminal of this multicast service.Communication network and user terminal for for example WiMAX are mobile radio station, the situation that multicast service carries with the IP packet, the service identification of multicast service comprises IP multicast address, and resource identification comprises connection identifier, and the sign of user terminal comprises the MAC Address of mobile radio station.The base station is receiving join request message or withdraw from request message or during the notification message of adjacent base station of multicast from user terminal, comes multicast service transmitted according to the sign of the service identification of wherein multicast service and user terminal and upgrades.Table 1 shows the example that multicast service is transmitted, the clauses and subclauses of each behavior in the table 1.Here need to prove that the version that the multicast service shown in the table 1 is transmitted only is in order to explain the enforcement of technical solution of the present invention, and should not be construed as the restriction to technical solution of the present invention.

Table 1 multicast service is transmitted

The service identification of multicast service (IP multicast address, (32bit, 10 systems))	Resource identification (connection identifier (16bit), 16 systems)	User terminal identification (MAC Address, (48bit, 16 systems))
			225.192.36.78	FE01	00-10-C6-CF-DE-ED00-20-C6-CF-DE-ED
232.166.168.56	FE02	00-10-06-CC-DE-ED00-10-C6-CF-DF-ED
			230.192.76.78	FE03	00-10-06-AC-DE-ED00-10-C6-AF-DF-ED

Fig. 2 shows the systems approach schematic flow sheet according to a specific embodiment of the present invention, below in conjunction with Fig. 1 and Fig. 2 systems approach flow process of the present invention is described in detail.Situation with the user terminal requests receiving multicast business in the region within the jurisdiction, base station is that example describes.

At first, in step P11, user terminal sends the multicast request message of request receiving multicast business to the base station, comprises its multicast address of asking the multicast service that receives and the sign of this user terminal in this multicast request message.

In step P12, the base station joins request after the message receiving multicast from user terminal, according to the user terminal identification that this multicast joins request and comprised in the message,, judge whether this user terminal has authority to receive this multicast service as the mobile phone MAC Address.For example, multicast service is a paying IPTV program, and user terminal could receive this multicast service after paying.Authority relevant informations such as user terminal pay records generally are stored in the special certificate server.The base station can send an authentication challenge message to this certificate server, and this authentication challenge message is used to inquire whether user terminal has authority to receive it and ask the multicast service that receives.Whether certificate server can respond an authentication challenge response message and notify this base station user terminal to have authority to receive it to the base station to ask the multicast service that receives.Certainly, if if authority relevant informations such as user terminal pay records are stored in the base station, the base station also can directly be judged, and be need not to send authentication challenge message.

If user terminal does not have authority to receive the multicast service that it is asked, this user terminal then can be notified in the base station, and points out this user terminal to go to obtain the authority that receives this multicast service.

Ask the multicast service that receives if user terminal has authority to receive it, in step P13, determine the resource identification corresponding with this multicast service.After multicast service for example shown in Figure 2 of maintenance is transmitted and is received this request message in the base station, from joining request message, multicast extracts multicast address, with this multicast address is that keyword searches in multicast service is transmitted whether corresponding clauses and subclauses (clauses and subclauses are corresponding to certain delegation in Fig. 2 table) are arranged, if corresponding clauses and subclauses are arranged, the base station then being described for other user terminal that it is had jurisdiction over provides this multicast service, has been that this multicast service Resources allocation sign and corresponding radio resource are to carry out the transmission of this multicast service before this.In step P14, notify the resource identification in the clauses and subclauses of this user terminal correspondence, and the sign of this user terminal is joined in that hurdle of user terminal identification in the corresponding clauses and subclauses.Increasing message by dynamic service between base station and the user terminal connects with the resource identification informing user terminal.

If there are not corresponding clauses and subclauses in the multicast forward table, illustrate that then the base station do not carry out the transmission of this multicast service as yet, a resource identification is then distributed for this multicast service in the base station, the resource identification that informing user terminal should distribute in step P14, so that this user terminal receives this multicast service on the Radio Resource that this resource identification identified, and in multicast service is transmitted, create new clauses and subclauses, comprise service identification, the resource identification of distribution and the sign of user terminal of this multicast service.Simultaneously in step P15, the base station sends multicast that request receives this multicast service message that joins request and with application this multicast service is sent to the base station to IAD.When the base station receives the multicast service that transmits via IAD, then distribute by the Radio Resource that resource identification identified of this multicast service correspondence to transmit this multicast service, user terminal then receives this multicast service on the Radio Resource that resource identification identified of this multicast service correspondence.

Here need to prove, judge that the step P12 whether user terminal has authority to receive the multicast service that its request receives is not an essential step shown in Fig. 2.

Situation with the user terminal requests receiving multicast business in the region within the jurisdiction, base station is that example comes systems approach flow process of the present invention is illustrated above.For the user terminal that promptly will switch to this region within the jurisdiction, base station from the adjacent base station region within the jurisdiction, slightly different in the above-mentioned flow process is step P11, it is the approach difference that the base station obtains the multicast address of the multicast service that user terminal requests receives, because user terminal does not switch to this region within the jurisdiction, base station as yet, the direct communication with it of this base station, therefore, notify this base station by adjacent base station with the multicast address of the multicast service of this user terminal requests reception, the resource identification of the multicast service correspondence that this user terminal requests receives is determined in this base station.When user terminal switched to this region within the jurisdiction, base station or begins to communicate by letter with this base station, the step P13 shown in the execution graph 2 notified the resource identification of this user terminal correspondence again.

Equally, in order to support the mobility of user terminal, for the user terminal that promptly will switch to the adjacent base station region within the jurisdiction from this region within the jurisdiction, base station, if this user terminal requests receiving multicast business, this base station need send a service identification notification message to described adjacent base station, is notified to described adjacent base station with the service identification of the multicast service of this user terminal being asked receive.During specific implementation, preferably, the service identification of described multicast service may be to send to adjacent base station with other professional relevant information that this user terminal asks to receive.

When user terminal is wanted to stop to receive certain multicast service, in step P21, user terminal sends multicast and withdraws from request message to the base station, the base station receives this multicast and withdraws from after the request message, in step P22, notify this user terminal to stop at and receive this multicast service on the corresponding radio resource.Concrete, in the WiMAX network, the multicast address corresponding service traffic identifier of the multicast service that comprises in the request message is withdrawed from the base station according to multicast, send the dynamic service deletion request message to user terminal (i.e. request deletion is the connection of sign with the connection identifier of this traffic stream identifier correspondence), a dynamic service deletion of user terminal response response message is given the base station.Like this, user terminal just stops at and receives this multicast service on the Radio Resource that connection identifier identified of the traffic stream identifier correspondence that is comprised in the dynamic service deletion request message.The user terminal identification that the base station is withdrawed from the request message to be comprised according to this multicast and the multicast address of multicast service, the sign of this user terminal of deletion in that hurdle of user terminal identification in the clauses and subclauses of the multicast service correspondence that withdraws from this user terminal requests during multicast service transmitted.

Preferably, in step P23, the base station also can be withdrawed from request message based on the multicast from user terminal that receives and determine whether also to receive this multicast service by other user terminal, and a kind of simple method is to transmit the record that whether also has other user terminal identification the clauses and subclauses of the multicast service correspondence that withdraws from of this user terminal requests of inquiry in that hurdle of user terminal identification from multicast service.If no, then judging does not have user terminal requests to receive this multicast service, and in step P24, the base station then sends a multicast and withdraws from request message to IAD.IAD just stops the packet of this multicast service is sent to the base station receiving after this multicast withdraws from request message.

The base station also can send inquiry request message on the Radio Resource that transmits multicast service, if at the fixed time in the interval, do not receive the query response message of Any user terminal, then judging does not have user terminal requests to receive this multicast service, and the base station sends a multicast and withdraws from request message to IAD.IAD just stops the packet of this multicast service is sent to the base station receiving after this multicast withdraws from request message.

The situation of carrying with the IP packet for multicast service, above-mentioned inquiry request message is IGMP/MLD group membership query messages (IGMP/MLD Group-Specific Query), query response message is the IGMP/MLD report message, has identical message format with the aforementioned multicast message that joins request.Predetermined time interval (Last_Query_Interval) is generally 1 second.More detailed situation can be with reference to the Internet igmpinternet, RFC1112 (IGMP v1), and RFC2236 (IGMP v2) is applicable to IPv4 or multicast listener discovery protocol MLD, Multicast Listener Discovery, RFC2710 is applicable to IPv6.

The situation of carrying with the IP packet for multicast service because this moment, the multicast message that joins request had identical message format with query response message, is example with IPv4, is all the IGMP report message.The base station needs also to judge whether this user terminal has known the resource identification of the multicast service that its request receives when the IGMP report message that receives from user terminal, promptly this IGMP report message is join request message or a query response message of multicast.The base station is inquired about multicast service according to the multicast address in the IGMP report message and user terminal identification and is transmitted, if the sign of existing this user terminal in that hurdle of user terminal identification in the clauses and subclauses of this multicast address correspondence, then this IGMP report message is a query response message, judge that this user terminal known the resource identification of the multicast service that its request receives, this user terminal is receiving this multicast service.If the sign of this user terminal not in that hurdle of user terminal identification in the clauses and subclauses of this multicast address correspondence, then this IGMP report message is the multicast message that joins request, judge that this user terminal do not know the resource identification of the multicast service that its request receives, the resource identification of the multicast service correspondence that this user terminal requests is received is notified this user terminal then.Certainly, for the situation of coming bearing multicast service with other agreement, message has different message formats with query response message if multicast joins request, and then need not above-mentioned deterministic process.

Here need to prove that the base station judges whether that user terminal in addition receives the multicast that the trigger condition of certain multicast service is not limited to receive from user terminal and withdraws from request message.The base station also can be regularly or not timing ground active inquiry multicast service transmit or send inquiry request message.

Fig. 3 shows the schematic flow sheet that is used for controlling the method process user terminal request receiving multicast business that multicast service sends according to a specific embodiment of the present invention in wireless communication network base station.

At first, in step S11, the service identification of the multicast service that receives according to user terminal requests is determined and the corresponding resource identification of this multicast service.Then, in step S12, notify described user terminal with described resource identification.Wherein, the described multicast service via the transmission of the upper level network equipment that receives is transmitted in the base station on the Radio Resource that described resource identification identified.

Wherein, step S11 can specifically be divided into two sub-steps S111 and S112 shown in Figure 4 again.At first, the service identification of the multicast service that receives is asked in the base station according to described user terminal in step S111, judge whether to distribute corresponding resource identification for this multicast service.

If not for this multicast service distributes corresponding resource identification, then in step S112, for this multicast service distributes a resource identification, and the multicast that the request that sends receives this multicast service joins request message to the upper level network equipment.In the described network topology structure of Fig. 1, this upper level network equipment is IAD.On the basis of the described network topology structure of Fig. 1, between base station and IAD, may also comprise one or more switches and/or one or more router, therefore, the upper level network equipment can also be switch or router.Message can be that the base station regenerates if the multicast that the base station sends joins request, also can be from user terminal.

Here different according to the residing zone of user terminal, the base station knows that the process of service identification of the multicast service that user terminal requests receives is also different, when user terminal is arranged in this region within the jurisdiction, base station, the base station receive from described user terminal be used to ask the multicast of the receiving multicast business message that joins request, this multicast to join request to comprise the service identification that institute asks the multicast service of reception in the message.When user terminal will will switch to this region within the jurisdiction, base station by the adjacent base station region within the jurisdiction, the base station receives the service identification notification message from adjacent base station, and it is used to notify the user terminal that will switch to this region within the jurisdiction, base station from this adjacent base station region within the jurisdiction to ask the service identification of the multicast service that receives.This notification message can be directly from adjacent base station, or transmits via the upper level network equipment (for example, IAD or router or switch) via adjacent base station.

In like manner, when the user terminal in this region within the jurisdiction, base station will switch to the adjacent base station region within the jurisdiction, this base station then sends the service identification notification message to described adjacent base station, and this service identification notification message is used to notify this this user terminal of adjacent base station to ask the service identification of the multicast service that receives.In like manner, this service identification notification message can directly send to adjacent base station, or is transmitted to adjacent base station via the upper level network equipment (for example, IAD or router or switch).

When the user terminal in this region within the jurisdiction, base station will switch to the adjacent base station region within the jurisdiction, comprise two kinds of situations: a kind of is that user terminal is just at receiving multicast business; Another kind is that user terminal has just sent the multicast message that joins request, also receiving multicast business not.For a kind of situation in back, judge if desired whether this user terminal has authority to receive this business, then the base station can determine whether sending the service identification notification message to adjacent base station according to the result who judges.

Certainly, described multicast joins request and also comprises the sign of the user terminal of asking receiving multicast business in message or the service identification notification message, the sign of this user terminal can be the sign of this user terminal of unique identification, for example, in the WiMAX cordless communication network, this sign can be the MAC Address of user terminal or expand unique identification (Extended UniqueIdentifier) etc.If user terminal is a mobile phone, the sign of user terminal also can comprise phone number or International Mobile Station Equipment Identification (IMEI) or IMSI International Mobile Subscriber Identity (IMSI) etc.

Preferably, the base station joins request after the message receiving multicast, can also judge whether this user terminal has the authority that receives the multicast service that its request receives according to the sign of user terminal.If user terminal has the authority of the multicast service that receives its request reception, then carry out above-mentioned steps S11 and S12.

For the user terminal that promptly will switch to this region within the jurisdiction, base station from the adjacent base station region within the jurisdiction, thinking that this user terminal is existing receives the authority that it asks the multicast service that receives, therefore, this base station does not need to judge whether this user terminal has authority to receive it and ask the multicast service that receives again usually.

Preferably, for the WiMAX cordless communication network, can safeguard also in the base station that a multicast service for example shown in Figure 2 transmits,, create or upgrade multicast service and transmit according to join request message or of the multicast from user terminal from the service identification notification message of adjacent base station.

Fig. 3 and Fig. 4 are described the flow process of process user terminal request receiving multicast business in the base station, below in conjunction with Fig. 5 and Fig. 6 the flow process that process user terminal in the base station withdraws from multicast service are described.

Fig. 5 shows according to a specific embodiment of the present invention and be used for the schematic flow sheet that the process user terminal withdraws from multicast service in wireless communication network base station.

At first, in step S21, reception is withdrawed from request message from the multicast that user terminal stops receiving multicast business.

Then, in step S22, request message is withdrawed from according to described multicast in the base station, notifies this user terminal to stop at and receives this multicast service on the Radio Resource that described resource identification identifies.

Be carried as example with WiMAX cordless communication network and multicast service with the IP packet, the base station is when receiving from the IGMP Leave message of user terminal or MLDMulticast Listener Done message, multicast address according to the multicast service that wherein comprises, according to storage in advance or each multicast service corresponding service flow identification information of base station dynamic assignment determine its traffic stream identifier, send the dynamic service deletion request message then to user terminal (i.e. request deletion is the connection of sign with the connection identifier of this traffic stream identifier correspondence), user terminal sends a dynamic service deletion response message to the base station.The user terminal identification that the base station is withdrawed from the request message to be comprised according to this multicast, the sign of this user terminal of deletion in that hurdle of user terminal identification in the clauses and subclauses of the multicast service correspondence that withdraws from this user terminal requests during multicast service transmitted.

The dynamic service delete procedure also can initiatively be initiated by user terminal.The connection identifier corresponding service traffic identifier of the multicast service correspondence that user terminal also can withdraw from according to its request sends the dynamic service deletion request message to the base station.After this dynamic service deletion request message is received in the base station, send a dynamic service deletion response message to user terminal.

Through behind the dynamic service delete procedure, user terminal just stops on the Radio Resource of the multicast service correspondence that its request withdraws from and receives this multicast service.Certainly, if also have other user terminal to receive this multicast service, the transmission of carrying out this multicast service on the Radio Resource that resource identification identified of this multicast service is still being distributed in the base station, if there is not other user terminal to receive this multicast service, the base station then stops at the transmission of carrying out this multicast service on the Radio Resource that resource identification identified of distributing to this multicast service.Fig. 6 shows the schematic diagram of the flow process of this process.

At first, in step S31, determine whether that user terminal receives this multicast service in addition.If there is not user terminal to receive this multicast service, then in step S32, stops at and transmit described this multicast service on the Radio Resource that resource identification identified of this multicast service correspondence.Preferably, the base station discharges the resource identification with this multicast service correspondence; During the deletion multicast service is transmitted with the clauses and subclauses of this multicast service correspondence; And send the multicast stop to receive described multicast service and withdraw from request message to the upper level network equipment.

The base station can determine whether that user terminal receives certain multicast service in addition with two kinds of methods.Whether a kind of method is to send to be used to inquire about on the Radio Resource that resource identification identified of this multicast service correspondence to also have user terminal to receive the inquiry request message of described multicast service, if do not receive the query response message of Any user terminal in the given time, then judging does not have user terminal to receive this multicast service.Another method is to transmit according to the multicast service of safeguarding in the base station, this multicast service corresponding user terminal sign during the inquiry multicast service is transmitted; If do not had during described multicast service is transmitted and the corresponding user terminal identification of described multicast service, then judging does not have user terminal to receive this multicast service.

Fig. 7 shows the structured flowchart that is used to control the multicast control device that multicast service sends according to a specific embodiment of the present invention in wireless communication network base station, and this multicast control device 10 comprises that first receiving device 11, second receiving system 12, first determine that device 13, first notifying device 14, professional conveyer 15, second judgment means 16, establishment or updating device 17, second determine device 18, the professional device 19 and second dispensing device 20 of stopping.Wherein, first determines that device 13 comprises first judgment means 131, distributor 132 and first dispensing device 133; Second determines that device 18 comprises inquiry unit 181 and the 3rd judgment means 182.For simplicity's sake, this multicast control device 10 has comprised the sub-device that is comprised in a lot of preferred embodiments, those skilled in the art are according to the application's instruction, only will be understood that wherein that first determines that device 13, first notifying device 14 and professional conveyer 15 are to implement the necessary device of the present invention, other sub-devices are option means.

At first, first determines the service identification of device 13 according to the multicast service of user terminal requests reception, determines and the corresponding resource identification of this multicast service.Then, first notifying device 14 is notified described user terminal with described resource identification.Wherein, professional conveyer 15 transmits the described multicast service via the transmission of the upper level network equipment that receives on the Radio Resource that described resource identification identified.

Wherein, the operating procedure of first definite device 13 can be carried out by first judgment means 131, distributor 132 and first dispensing device 133 respectively again.At first, first judgment means 131 is asked the service identification of the multicast service that receives according to described user terminal, judge whether to distribute corresponding resource identification for this multicast service.If distributed corresponding resource identification for this multicast service, then the previous user terminal requests that has other of explanation receives this multicast service, and professional conveyer 15 has carried out the transmission of described multicast service on the Radio Resource that resource identification identified that has distributed.

If do not distribute corresponding resource identification for this multicast service, then distributor 132 distributes a resource identification for this multicast service, the multicast that first dispensing device 133 sends this multicast service of request reception joins request message to the upper level network equipment, in the described network topology structure of Fig. 1, this upper level network equipment is IAD.On the basis of the described network topology structure of Fig. 1, between base station and IAD, may also comprise one or more switches and/or one or more router, therefore, the upper level network equipment can also be switch or router.Message can be that the base station regenerates if the multicast that the base station sends joins request, also can be from user terminal.Professional conveyer 15 then distributes by Radio Resource that described resource identification identifies to carry out the transmission of this multicast service when receiving the multicast service that transmits via upper level equipment.

Here different according to the residing zone of user terminal, the base station knows that the process of service identification of the multicast service that user terminal requests receives is also different, when user terminal is arranged in this region within the jurisdiction, base station, first receiving device 11 receive from described user terminal be used to ask the multicast of the receiving multicast business message that joins request, this multicast to join request to comprise the service identification that institute asks the multicast service of reception in the message.When user terminal will will switch to this region within the jurisdiction, base station by the adjacent base station region within the jurisdiction, second receiving system 12 receives the service identification notification message from adjacent base station, and it is used to notify the user terminal that will switch to this region within the jurisdiction, base station from this adjacent base station region within the jurisdiction to ask the service identification of the multicast service that receives.This service identification notification message can be directly from adjacent base station, or transmits via the upper level network equipment (for example, IAD or router or switch) via adjacent base station.

In like manner, when will switching to the adjacent base station region within the jurisdiction, the user terminal in the region within the jurisdiction, base station (comprises two kinds of situations, a kind of is that user terminal is just at receiving multicast business, another kind is that user terminal has just sent the multicast message that joins request, receiving multicast business not also), 20 of second dispensing devices send the service identification notification message to described adjacent base station, and this service identification notification message is used to notify this this user terminal of adjacent base station to ask the service identification of the multicast service that receives.In like manner, this service identification notification message can directly send to adjacent base station, or is transmitted to adjacent base station via the upper level network equipment (for example, IAD or router or switch).

When the user terminal in this region within the jurisdiction, base station will switch to the adjacent base station region within the jurisdiction, comprise two kinds of situations: a kind of is that user terminal is just at receiving multicast business; Another kind is that user terminal has just sent the multicast message that joins request, also receiving multicast business not.For a kind of situation in back, judge if desired whether this user terminal has authority to receive this business, then second dispensing device 20 can determine whether sending the service identification notification message to adjacent base station according to the judged result of second judgment means 16.

Preferably, receive multicast at first receiving device 11 and join request after the message, second judgment means 16 can also judge whether this user terminal has the authority that receives the multicast service that its request receives according to the sign of user terminal.If user terminal has the authority of the multicast service that receives its request reception, then first determines device 13 and first notifying device, 14 execution aforesaid operations.

More than the process of process user terminal request receiving multicast business in the multicast control device 10 is described, the process that process user terminal in the multicast control device 10 is withdrawed from multicast service describes below.

At first, first receiving device 11 receptions are withdrawed from request message from the multicast that user terminal stops receiving multicast business.

Then, first notifying device 14 withdraws from request message according to described multicast, notifies this user terminal to stop at and receives this multicast service on the Radio Resource that described resource identification identifies.

Be carried as example with WiMAX cordless communication network and multicast service with the IP packet, after first receiving device 11 received IGMP Leave message or MLD Multicast Listener Done message from user terminal, first notifying device 14 was determined its this multicast service corresponding service traffic identifier according to the multicast address of the multicast service that wherein comprises and storage in advance or each multicast service corresponding service flow identification information of base station dynamic assignment.According to this traffic stream identifier, send the dynamic service deletion request message to user terminal (i.e. request deletion is the connection of sign with the connection identifier of this traffic stream identifier correspondence), user terminal sends a dynamic service deletion response message to the base station.Upgrade or user terminal identification that creation apparatus 17 withdraws from the request message to be comprised according to this multicast the sign of this user terminal of deletion in that hurdle of user terminal identification in the clauses and subclauses of the multicast service correspondence that withdraws from this user terminal requests during multicast service is transmitted.

Through behind the dynamic service delete procedure, user terminal just stops on the Radio Resource of the multicast service correspondence that its request withdraws from and receives this multicast service.Certainly, if also have other user terminal to receive this multicast service, professional conveyer 15 is still being distributed to the transmission of carrying out this multicast service on the Radio Resource that resource identification identified of this multicast service, if there is not other user terminal to receive this multicast service, professional 15 of conveyers stop at the transmission of carrying out this multicast service on the Radio Resource that resource identification identified of distributing to this multicast service, and the detail operations process of relevant apparatus is as follows.

At first, second determines that device 18 determines whether that user terminal receives this multicast service in addition.If there is not user terminal to receive this multicast service, then professional the termination transmitted described this multicast service on the Radio Resource that resource identification identified that the professional conveyer 15 of device 19 controls stops at this multicast service correspondence.Preferably, also should comprise following operation: the professional resource identification that stops device 19 releases with this multicast service correspondence; Clauses and subclauses with this multicast service correspondence during establishment or updating device 17 are transmitted multicast service are deleted; And send the multicast that stops to receive described multicast service by first dispensing device 133 and withdraw from request message to the upper level network equipment.

Particularly, first determines that device 18 also comprises inquiry unit 181, the three judgment means 182.First determines that device 18 can determine whether that user terminal receives certain multicast service in addition with two kinds of methods.A kind of method is whether inquiry unit 181 sends to be used to inquire about on the Radio Resource that resource identification identified of this multicast service correspondence and also have user terminal to receive the inquiry request message of described multicast service, if do not receive the query response message of Any user terminal in the given time, then the 3rd judgment means 182 judges do not have user terminal to receive this multicast service.Another method is that inquiry unit 181 is transmitted according to the multicast service of safeguarding in the base station, this multicast service corresponding user terminal sign during the inquiry multicast service is transmitted; If do not had during described multicast service is transmitted and the corresponding user terminal identification of described multicast service, then the 3rd judgment means 182 judges do not have user terminal to receive this multicast service.

Though be that example has been described in detail the present invention with the WiMAX radio communication among the present invention, those skilled in the art is according to the instruction of present specification, will be understood that to the invention is not restricted to the WiMAX cordless communication network, for other cordless communication network, the present invention is suitable equally.User terminal among the present invention is not limit, and comprises mobile radio station or fixed station that all can communicate with the base station.

More than specific embodiments of the invention are described.It will be appreciated that the present invention is not limited to above-mentioned specific implementations, those skilled in the art can make various distortion or modification within the scope of the appended claims.

Claims

1. one kind is used to control the method that multicast service sends in wireless communication network base station, wherein, may further comprise the steps:

A. the service identification of the multicast service that receives according to user terminal requests is determined and the corresponding resource identification of this multicast service;

B. notify described user terminal with described resource identification;

Wherein, on the Radio Resource that described resource identification identified, transmit the described multicast service that receives via the transmission of the upper level network equipment.

2. method according to claim 1, wherein, described step a may further comprise the steps:

A1. ask the service identification of the multicast service that receives according to described user terminal, judge whether to distribute corresponding resource identification for this multicast service;

If a2. not for this multicast service distributes corresponding resource identification, then for this multicast service distributes a resource identification, and the multicast that the request that sends receives this multicast service joins request message to the upper level network equipment.

3. method according to claim 1 and 2, wherein, further comprising the steps of:

A. the service identification of the multicast service that receives according to user terminal requests and create or upgrade multicast service and transmit with the sign of corresponding resource identification of this multicast service and user terminal.

4. method according to claim 3, wherein, described user terminal is arranged in this region within the jurisdiction, base station, and is further comprising the steps of before described step a:

-receive from described user terminal be used to ask the multicast of the receiving multicast business message that joins request, this multicast to join request to comprise the service identification that institute asks the multicast service of reception in the message.

5. method according to claim 4, wherein, further comprising the steps of:

-according to the described multicast message that joins request, judge whether described user terminal has authority to receive described multicast service;

Wherein, if described user terminal has authority to receive described multicast service, then carry out described step a, b.

6. according to claim 4 or 5 described methods, wherein, described steps A is further comprising the steps of:

-according to the described multicast message that joins request, create or upgrade described multicast service and transmit.

7. method according to claim 3, wherein, described user terminal will switch to this region within the jurisdiction, base station by the adjacent base station region within the jurisdiction, and will be further comprising the steps of before described step a:

-receiving service identification notification message from adjacent base station, it is used to notify the user terminal that will switch to this region within the jurisdiction, base station from this adjacent base station region within the jurisdiction to ask the service identification of the multicast service that receives;

Described step b may further comprise the steps:

-when described user terminal switches to this region within the jurisdiction, base station, notify this user terminal with described resource identification.

8. method according to claim 7, wherein, described steps A is further comprising the steps of:

-according to described service identification notification message, create or upgrade described multicast service and transmit.

9. method according to claim 3 wherein, may further comprise the steps:

I. receive the multicast that stops receiving multicast business from user terminal and withdraw from request message;

Ii. withdraw from request message according to described multicast, notify this user terminal to stop at and receive this multicast service on the Radio Resource that described resource identification identifies.

10. method according to claim 9, wherein, described steps A is further comprising the steps of:

-withdraw from request message according to described multicast, upgrade described multicast service and transmit.

11. method according to claim 9 is wherein, further comprising the steps of:

I. determine whether that user terminal receives described multicast service in addition;

If II. there is not user terminal to receive described multicast service, transmit described this multicast service on the Radio Resource that then stops at described resource identification and identified.

12. method according to claim 11, wherein, described step I is further comprising the steps of:

-transmission is used to inquire about the inquiry request message that whether also has user terminal to receive described multicast service on the Radio Resource that described resource identification identified,

If-do not receive the query response message of Any user terminal in the given time, then judging does not have user terminal to receive this multicast service.

13. according to the described method of claim 11, wherein, described step I is further comprising the steps of:

-inquiry described multicast service transmit in the corresponding user terminal identification of described multicast service;

If do not had during-described multicast service is transmitted and the corresponding user terminal identification of described multicast service, then judging does not have user terminal to receive this multicast service.

14. method according to claim 1 and 2 is wherein, further comprising the steps of:

-when user terminal will switch to the adjacent base station region within the jurisdiction, then sending the service identification notification message to described adjacent base station, this service identification notification message is used to notify this this user terminal of adjacent base station to ask the service identification of the multicast service that receives.

15. method according to claim 1 and 2, wherein, described cordless communication network comprises the WiMAX cordless communication network, and the described upper level network equipment comprises access service network gateway or switch or router, and described user terminal comprises mobile radio station.

16. one kind is used to control the multicast control device that multicast service sends in wireless communication network base station, wherein, comprises:

First determines device, is used for the service identification according to the multicast service of user terminal requests reception, determines and the corresponding resource identification of this multicast service;

First notifying device is used for notifying described user terminal with described resource identification;

Professional conveyer transmits the described multicast service via the transmission of the upper level network equipment that receives on the Radio Resource that is used for identifying at described resource identification.

17. multicast control device according to claim 16, wherein, described first determines that device also comprises:

First judgment means is used for asking according to described user terminal the service identification of the multicast service that receives, judges whether to distribute corresponding resource identification for this multicast service;

Distributor is used for when described first judgment means judgement does not distribute corresponding resource identification for this multicast service, is that this multicast service distributes a resource identification;

First dispensing device is used for when described first judgment means judgement does not distribute corresponding resource identification for this multicast service, and the multicast that the request of transmission receives this multicast service joins request message to the upper level network equipment.

18., wherein, also comprise according to claim 16 or 17 described multicast control device:

Create or updating device, be used for the service identification of the multicast service that receives according to user terminal requests and create or upgrade multicast service and transmit with the sign of corresponding resource identification of this multicast service and user terminal.

19. multicast control device according to claim 18, wherein, described user terminal is arranged in this region within the jurisdiction, base station, also comprises:

First receiving device is used to receive multicast from the request receiving multicast business of the described user terminal message that joins request, and this multicast joins request and comprises the service identification of the multicast service that receives of asking in the message.

20. multicast control device according to claim 19 wherein, also comprises:

Second judgment means is used for judging according to the described multicast message that joins request whether described user terminal has authority to receive this multicast service;

Wherein, if described user terminal has authority to receive described multicast service, then determine device and the corresponding operation of first notifying device execution by described first.

21. according to claim 19 or 20 described multicast control device, wherein, described renewal or creation apparatus also are used for:

22. multicast control device according to claim 18, wherein, described user terminal will switch to this region within the jurisdiction, base station by the adjacent base station region within the jurisdiction, also comprise:

Second receiving system is used to receive the service identification notification message from adjacent base station, and it is used to notify the user terminal that will switch to this region within the jurisdiction, base station from this adjacent base station region within the jurisdiction to ask the service identification of the multicast service that receives;

Described first notifying device also is used for:

23. multicast control device according to claim 22, wherein, described establishment or updating device also are used for:

24. multicast control device according to claim 19, wherein, described first receiving device also is used for:

-reception is withdrawed from request message from the multicast that user terminal stops receiving multicast business;

Described first notifying device also is used for:

-withdraw from request message according to described multicast, notify this user terminal to stop at and receive this multicast service on the Radio Resource that described resource identification identifies.

25. multicast control device according to claim 24, wherein, described establishment or updating device also are used for:

26. multicast control device according to claim 24 wherein, also comprises:

Second determines device, is used to determine whether also have user terminal to receive described multicast service;

The professional device that stops if be used for not having user terminal to receive described multicast service, transmits described multicast service on the Radio Resource that then stops at described resource identification and identified.

27. multicast control device according to claim 26, wherein, described second determines that device also comprises:

Inquiry unit, transmission is used to inquire about the inquiry request message that whether also has user terminal to receive described multicast service on the Radio Resource that is used for identifying at described resource identification,

The 3rd judgment means is used for when not receiving the query response message of Any user terminal in the given time, and then judging does not have user terminal to receive this multicast service.

28. according to the described multicast control device of claim 27, wherein, described inquiry unit also is used for:

The corresponding user terminal of described multicast service during the described multicast service of-inquiry is transmitted;

Described second judgment means also is used for:

If do not had during-described multicast service is transmitted and the corresponding user terminal of described multicast service, then judging does not have user terminal to receive this multicast service.

29., wherein, also comprise according to claim 16 or 17 described multicast control device:

Second dispensing device, user terminal will be used for when will switch to the adjacent base station region within the jurisdiction, send the service identification notification message to described adjacent base station, this service identification notification message is used to notify this this user terminal of adjacent base station to ask the service identification of the multicast service that receives.

30. according to claim 16 or 17 described multicast control device, wherein, described cordless communication network comprises the WiMAX cordless communication network, and the described upper level network equipment comprises access service network gateway or switch or router, and described user terminal comprises mobile radio station.