CN1937848B - Wireless roaming user multicast realizing method and access controller - Google Patents
Wireless roaming user multicast realizing method and access controller Download PDFInfo
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Abstract
The invention discloses a kind of multicast method and access controller of wireless roaming users, Including the following steps : First, the access controller establishes the user terminal who has customized multicast operation and maintains the information of its multicast users; When the access controller receives the multicast operation, according to the said multicast information when more than one user terminal who have customized the same multicast operation were found , only choose one network interface to receive the multicast operation, and send it to the user terminal who customized the multicast operation. According to the method, the system and the access controller described in this invention, it can block the multicast replication to save system resource; improve the send efficiency of multicast operation.
Description
Technical field
The present invention relates to multicasting technology in the wireless network, specifically, relate to a kind of method of realizing group broadcasting and access controller of wireless roaming user.
Background technology
The application model of wireless network is varied, and wherein the most frequently used is exactly that microcellulor covers and roaming, just by the collaborative work of a plurality of AP (Access Point, access point), enlarges the wireless network area coverage effectively.Usually, when having some users or need set up a stable wireless network platform, generally can adopt with single AP is the pattern at center, and limited " information point " expanded to " information area ", and this pattern also is the most common structure pattern of WLAN (wireless local area network).Though cover by AP and can solve multipoint access, but the coverage of single AP is also very limited, simultaneously owing to be subjected to the influence of various barriers, can produce certain signal de-emphasis, therefore (as showground or large-scale Administrative Area) utilizes the networking model of wireless equity or single AP can not satisfy the demand in more extensive space in big zone.In order to enlarge the wireless network coverage, multiple access point microcellulor occurs and covered scheme, it is roaming technology, collaborative work by a plurality of AP, can enlarge the wireless network area coverage effectively, the user can be movable in the scope that AP group covers, and can be not out of touch with network, communication can not interrupted, thereby reaches the radio roaming purpose of big activity space.
Multicast is a kind of data packet transmission mode, and when multiple host became the recipient of a packet simultaneously, for the consideration to bandwidth and CPU burden, multicast became a kind of optimal selection.
As shown in Figure 1, in existing wireless network, user terminal 1 (STA1) roams 1 to roaming place network 3, by AC (the Access Controller on AP access roaming ground, roaming place from its belonging area network, access controller), STA1 is responsible for access control at its belonging area network by AC1; Equally, wireless user 2 (STA2) roams 2 to roaming place network 3 from its belonging area network, and by the AC (Access Controller, access controller) on AP access roaming ground, roaming place, STA2 is responsible for access control its belonging area network by AC2; Media server (Media Server, MS) provide multicast service (S, G), wherein, S is the unicast ip address of media server, i.e. multicast source address, G is a multicast group address.
At this moment, suppose that STA1 and STA2 have roamed into same network (roaming place network 3), and they are at same BSSID (the Basic Service Set Identifier with an AP, the primary service area identifier) on, STA1 and STA2 in the network of roaming place, all need to customize multicast service (S, G) detailed process is as follows:
Step 101: in the roaming place, STA1, STA2 customize respectively multicast service (S, G); Then STA1 sends the IGMP message carry multicast service, is delivered to AC1 by AP, AC, arrive at last MS customization multicast service (S, G); Equally, STA2 sends the IGMP message carry multicast service, is delivered to AC2 by AP, AC, arrive at last MS customization multicast service (S, G).
Step 102: when MS send multicast service (S, in the time of G), for the SAT1 that has customized this multicast service, MS with this multicast service by AC1, and the roaming tunnel of STA1 send to AC; Equally, for the SAT2 that has customized this multicast service, MS with this multicast service by AC2, and the roaming tunnel of STA2 send to AC; That is to say, at this moment, AC receive the double multicast service (S, G);
Step 103:AC sends to AP with the double multicast service of receiving, then, AP sends down this double multicast service again, that is to say,, received two parts of multicast services respectively for STA1 and STA2, in Fig. 1, shown in solid arrow path and the dotted arrow path.Like this, just, brought the problem of multicast replication.
In said process, for STA1 and STA2, all customized in fact same multicast service (S, G).Be not difficult to find out, existing this multicast mode, make the user receive repeatedly multicast service, each user only need receive that a multicast service gets final product in fact, therefore, and such multicast replication problem, not only make the user repeat to receive identical multicast service, the more important thing is, repeated to take valuable system resource, reduced the multicast service forward efficiency.
Therefore, when the user roams into the roaming place network, how to provide a kind of method of multicasting and the access controller that can block multicast replication, become the technical problem that needs to be resolved hurrily.
Summary of the invention
Technical problem to be solved by this invention provides a kind of method of realizing group broadcasting and access controller of wireless roaming user, realizes blocking multicast replication, thereby conserve system resources improves the multicast service transmitting efficiency.
For solving the problems of the technologies described above, it is as follows to the invention provides scheme:
A kind of method of realizing group broadcasting of wireless roaming user comprises the steps:
Its multicast user's information is set up and safeguarded to A, access controller to the user terminal of customization multicast service, wherein, described multicast user's information is the accessing position information of multicast service, user terminal unique identification information, user terminal, between corresponding relation; For roaming user terminal, the accessing position information of described user terminal is the logic interfacing information that roaming user terminal inserts access controller;
B, when the access controller receiving multicast business, when having the user terminal of customization same multicast business more than 1 according to described multicast user's INFORMATION DISCOVERY, only select to receive this multicast service, and send to the user terminal that has customized this multicast service from a network interface; Wherein said network interface comprises described logic interfacing.
Method of the present invention, wherein, described multicast service is that (S represents multicast source address for S, G) information, and G represents multicast group address; Described user terminal unique identification information is the MAC Address of user terminal.
Method of the present invention, wherein, described steps A further comprises the steps:
When user terminal customization multicast service, described multicast user's information is set up and preserved to access controller;
When described user terminal was cancelled the multicast service of its customization, access controller was deleted corresponding multicast user's information from multicast user's information of being safeguarded.
Method of the present invention, wherein, described step B further comprises the steps:
B11, when the access controller receiving multicast business, the user terminal that has customization same multicast business more than 1 according to described multicast user's INFORMATION DISCOVERY, and when being the roamer, select only to select to come receiving multicast business according to the accessing position information of the user terminal in the roaming information, continue to send this multicast service according to multicast forwarding information again to the roaming user terminal of this multicast service of customization from the roaming tunnel logic interfacing of a roaming user terminal;
B12, the multicast service that will receive from the roaming tunnel logic interfacing of the roaming user terminal beyond the roaming tunnel logic interfacing of the described roaming user terminal of having selected directly abandon.
Method of the present invention, wherein, described step B further comprises the steps:
B21, when the access controller receiving multicast business, when having the roaming user terminal of customization same multicast business and LUT according to described multicast user's INFORMATION DISCOVERY, only select local interface to come receiving multicast business, continue again to send this multicast service to the roaming user terminal and the LUT of this multicast service of customization;
B22, the multicast service that will receive from the roaming tunnel logic interfacing of all roaming user terminals directly abandon.
A kind of access controller comprises, roaming information memory cell, multicast forwarding information memory cell; Also comprise: multicast user's maintenance of information unit, and judge transmitting element;
Described multicast user's maintenance of information unit is used to preserve and multicast user's information of maintenance customer's terminal, multicast user's information be multicast service, user terminal unique identification information, and the accessing position information of user terminal between corresponding relation;
Described judgement transmitting element, be used for when receiving multicast service, when there is the user terminal of customization same multicast business more than 1 in multicast user's INFORMATION DISCOVERY of the user terminal of preserving according to described multicast user's maintenance of information unit, only select to receive this multicast service and send to the user terminal of this multicast service of customization from a network interface.
Access controller of the present invention, wherein,
Described multicast user's maintenance of information unit is further used for preserving described multicast user's information according to the user terminal customization message that multicast service sent; Cancel the message that multicast service sent that it customizes according to described user terminal, delete corresponding multicast user's information.
Access controller of the present invention, wherein,
Described roaming information memory cell is used to preserve the roaming information of roaming user terminal, roaming information be the user terminal unique identification information, and the accessing position information of user terminal between corresponding relation;
Described multicast forwarding information memory cell, the user preserves the user multicast forwarding information of roaming user terminal, multicast forwarding information be multicast service, and the accessing position information of user terminal between corresponding relation.
Access controller of the present invention, wherein,
Described judgement transmitting element, when being further used for receiving multicast service, there is the user terminal of customization same multicast business more than 1 in multicast user's INFORMATION DISCOVERY of the user terminal of preserving according to described multicast user's maintenance of information unit, and when being the roamer, select only to select to come receiving multicast business according to the accessing position information of the user terminal in the roaming information of preserving in the roaming information memory cell, continue to send this multicast service according to the multicast forwarding information of preserving in the multicast forwarding information memory cell again to the roaming user terminal of this multicast service of customization from the roaming tunnel logic interfacing of a roaming user terminal.
Access controller of the present invention, wherein,
Described judgement transmitting element, be further used for when receiving multicast service, when multicast user's INFORMATION DISCOVERY of the user terminal of preserving according to described multicast user's maintenance of information unit exists the roaming user terminal of customization same multicast business and LUT, only select the local interface receiving multicast business and send to the roaming user terminal and the LUT of this multicast service of customization.
The method of the invention and access controller, by access controller the user terminal that customizes multicast service is carried out the maintenance of multicast user's information, and when receiving multicast service, when having the user terminal of customization same multicast business more than 1 according to multicast user's INFORMATION DISCOVERY of described maintenance, only select from the multicast service of a network interface reception, and send to the user terminal of this multicast service of customize, realized when existence in the network has customized the roaming user terminal of multicast service, blocking-up to multicast replication, thereby conserve system resources improves the multicast service transmitting efficiency.
Technical problem to be solved by this invention, technical scheme main points and beneficial effect will be in conjunction with the embodiments, are described further with reference to accompanying drawing.
Description of drawings
Fig. 1 realizes the system configuration schematic diagram of multicast service for roamer in the prior art;
Fig. 2 is the flow chart of the described method of the embodiment of the invention;
Fig. 3 is the structural representation of the described system of the embodiment of the invention;
Fig. 4 is the described ownership place access controller of an embodiment of the invention structural representation;
Fig. 5 is the described roaming place of an embodiment of the invention access controller structural representation;
Fig. 6 is the structural representation of the described system of another embodiment of the present invention.
Embodiment
With reference to Fig. 2, in wireless network, access controller AC realizes comprising the steps: the method for the multicast service that it customizes to the current roaming user terminal that inserts
Step 201: roaming place AC carries out multicast user's maintenance of information to the customization user in multicast service terminal of current access.That is,, set up and preserve the accessing position information of multicast service, user terminal unique identification information, user terminal according to the multicast service that user terminal customized that is inserted, between corresponding relation.
Here, described multicast service is that (S represents multicast source address for S, G) information, and G represents multicast group address.Described user terminal unique identification information can be the MAC Address of user terminal.The accessing position information of user terminal can adopt the logic interfacing W-P information of roaming user terminal access roaming ground AC to represent.In view of this, multicast user's information that AC safeguards can adopt and safeguard (S, G), MAC, W-P} information is represented.
For example, when wireless user terminal during from a netsurfing to another network, at first, its ownership place AC safeguards its roaming information, here, roaming information can adopt user terminal unique identification information (as, the MAC Address of roaming user terminal), with the accessing position information of user terminal, between corresponding relation represent.Here, the accessing position information of user terminal is that the accessing position information of user terminal ownership place AC and AC internetwork roaming tunnel, roaming place correspondence for example, adopts user terminal ownership place AC and AC internetwork roaming tunnel, roaming place logic interfacing T-P to represent in fact.Like this, roaming information can be expressed as { MAC, T-P}.
When the AC in the network of roaming place find to exist from wireless user terminal that other wireless network roaming comes, roaming place AC sets up and preserves the roaming user terminal roaming information (roaming information of being safeguarded with roaming user terminal ownership place AC, as { MAC, T-P}) time, roaming place AC can send the IGMP general query to this roaming user terminal, inquire which multicast service this roaming user terminal had customized in its belonging area network, roaming user terminal then sends the IGMP that carries its multicast service that customizes and joins message on its roaming tunnel, promptly, by roaming place AC, send to its ownership place AC, arrive the media server MS that this multicast service is provided at last.
In this process, roaming place AC joins message by eavesdropping described IGMP, sets up and preserve multicast user's information, as, (S, G), MAC, W-P} information.In addition, similar with the mode of existing realization roamer multicast service, when roaming place AC joins message at eavesdropping IGMP, simultaneously, also safeguarded multicast forwarding information, that is, set up and preserve multicast forwarding information.The multicast forwarding information here, can adopt multicast service, with the accessing position information of user terminal, between corresponding relation represent.Here, the accessing position information of user terminal is exactly the accessing position information of roaming user terminal access roaming ground AC in fact, for example, can adopt the logic interfacing W-P information of roaming user terminal access roaming ground AC to represent.That is, the employing of multicast forwarding information (S, G), the W-P} information representation.Like this when AC receives multicast service, can be according to the network interface of multicast forwarding information indication (as, W-P) user terminal forwarding multicasting business downstream.
Certainly, for said process, described roaming place AC can be the multicast customized messages (carrying the IGMP message of the multicast service that is customized) of eavesdropping the user terminal of current access at any time in fact, and safeguards multicast user's information according to the multicast customized messages of eavesdropping.That is to say when roaming place AC safeguards multicast user's information, not only when finding there is the roamer, inquire it at the multicast service that ownership place customized, safeguard multicast user's information of this roaming user terminal by sending the IGMP message; Also, safeguard the multicast user information of roaming user terminal when roaming place customization multicast service, and LUT is safeguarded LUT multicast user information when the customization multicast service by eavesdropping the IGMP message at any time.
In said process, AC is the IGMP leave message that sends when this multicast service of cancellation of eavesdropping user terminal simultaneously in real time, according to multicast user's information of having safeguarded in the IGMP leave message deletion multicast user information (S, G), MAC, W-P}.Guarantee multicast user's information real-time update that AC safeguards.
When the ownership place AC of roaming user terminal when intercepting the IGMP message, then also multicast user's information is safeguarded.That is, set up and preserve multicast service (as, the accessing position information of (S, G)), roaming user terminal unique identification information (as, the MAC Address of roaming user terminal), user terminal, between corresponding relation.Here, the accessing position information of described user terminal is exactly the accessing position information in roaming user terminal ownership place AC and AC internetwork roaming tunnel, roaming place in fact.For example, can adopt the logic interfacing T-P information in roaming user terminal ownership place AC and AC internetwork roaming tunnel, roaming place to represent.Herein, roaming place user terminal ownership place AC to multicast user's information safeguard mainly be because, the ownership place AC of this user terminal also is being the roaming place AC of those user terminals for the user terminal that comes from other netsurfings in fact, in order also to solve those roamers' multicast replication problem in this case, we adopt multicast user's information are safeguarded here.
Simultaneously, similar with the mode of existing realization roamer multicast service, ownership place AC has also safeguarded multicast forwarding information,, sets up and preserve multicast forwarding information that is.This is when receiving the multicast service from media server, and ownership place AC can know whither and transmit, such as professional to which roaming place AC forwarding multicasting or downstream user terminal transmit.The multicast forwarding information here, can adopt multicast service, with the accessing position information of user terminal, between corresponding relation represent.Equally, the accessing position information of described user terminal is exactly the accessing position information in roaming user terminal ownership place AC and AC internetwork roaming tunnel, roaming place in fact.For example, can adopt the logic interfacing T-P information in roaming user terminal ownership place AC and AC internetwork roaming tunnel, roaming place to represent.Therefore, multicast forwarding information can be expressed as: (S, G), T-P}.
Step 202: when the media server MS of the multicast service that provides roaming user terminal to customize sends multicast service, after roaming place AC receives multicast service, multicast user's information { (S according to its maintenance, G), MAC, W-P}, if find to have the multicast service that the user terminal customized (S more than 1, when G) identical, then roaming place AC is according to the roaming information { MAC of these user terminals, T-P} only needs to keep the multicast service from one of them network interface, directly abandons for the multicast service from other network interfaces to get final product.In other words, be exactly only to select a network interface receiving multicast business, block other network interfaces.Then, according to of the multicast service downstream user terminal forwarding of multicast forwarding information with reception.
For example, when the user terminal of the same multicast service of customization is roaming user terminal, at this moment, access controller is then according to the roaming information { MAC of these user terminals, T-P}, the roaming tunnel logic interfacing T-P of any one roaming user terminal comes receiving multicast business only to need to select wherein, and then continues according to multicast forwarding information that the user terminal forwarding multicasting is professional downstream gets final product; And block for the multicast service from the roaming tunnel logic interfacing T-P of other roaming user terminals, that is, directly abandoning, user terminal is transmitted no longer downstream.
Again for example, when the customization same multicast service user terminal both comprised roaming user terminal, when comprising LUT again, access controller then only selects local interface to come receiving multicast business, and then continues user terminal forwarding multicasting business downstream; Simultaneously, for all roaming user terminals, access controller is then according to these roamers' of its maintenance roaming information { MAC, T-P} blocks the multicast service that receives from its roaming tunnel logic interfacing T-P, promptly, directly abandon, user terminal is transmitted no longer downstream.
With reference to Fig. 3, the described system of the embodiment of the invention comprises: media server 10 (hereinafter to be referred as MS) first user terminal 60 (hereinafter to be referred as STA1), second user terminal 70 (hereinafter to be referred as STA2), first access controller 20 (hereinafter to be referred as AC1), second access controller 30 (hereinafter to be referred as AC2), the 3rd access controller 40 (hereinafter to be referred as AC), access point 50 (hereinafter to be referred as AP).
The ownership place access controller of STA1, STA2 is respectively AC1, AC2; STA1, STA2 roam into the roaming place network from its belonging area network respectively, and all insert AC by AP, by AC it are carried out access control respectively.
Wherein, as shown in Figure 4, the ownership place access controller, that is, first access controller among Fig. 3 (for for the STA1), two access controllers (for STA2) comprising: roaming information memory cell (21), multicast forwarding information memory cell (22).
Described roaming information memory cell 21 is used to preserve user roaming information, roaming information be user terminal unique identification information (as, the MAC Address of user terminal), and the accessing position information of user terminal between corresponding relation.Here, the user terminal unique identification information can adopt the MAC Address of user terminal to represent, the accessing position information of user terminal, be exactly in fact, the accessing position information of user terminal ownership place AC and AC internetwork roaming tunnel, roaming place correspondence, for example, adopt user terminal ownership place AC and AC internetwork roaming tunnel, roaming place logic interfacing T-P to represent.Like this, roaming information is { MAC, T-P}.Roaming information for STA1, STA2 is respectively: { MAC1, T-P1}, { MAC2, T-P2}.
Described multicast forwarding information memory cell 22, the user preserves the user multicast forwarding information, multicast forwarding information be multicast service, and the accessing position information of user terminal between corresponding relation.Here, multicast service is that (S represents multicast source address for S, G) information, and G represents multicast group address.The accessing position information of user terminal is exactly the accessing position information in roaming user terminal ownership place AC and AC internetwork roaming tunnel, roaming place in fact.For example, can adopt the logic interfacing T-P information in roaming user terminal ownership place AC and AC internetwork roaming tunnel, roaming place to represent.Therefore, multicast forwarding information is: (S, G), T-P}.Multicast forwarding information for STA1, STA2 be respectively (S, G), T-P1}, (S, G), T-P2}.
As shown in Figure 5, the roaming place access controller, that is, the 3rd access controller among Fig. 3 (for STA1, STA2) 40 comprises: roaming information memory cell 41, multicast forwarding information memory cell 42, multicast user's maintenance of information unit 43, and judge transmitting element 44.
Described roaming information memory cell 41 is used to preserve the roaming information of roaming user terminal, roaming information be user terminal unique identification information (as, the MAC Address of roaming user terminal), and the accessing position information of user terminal between corresponding relation.Here, the user terminal unique identification information can adopt the MAC Address of roaming user terminal to represent, the accessing position information of user terminal, be exactly in fact, the accessing position information of user terminal ownership place AC and AC internetwork roaming tunnel, roaming place correspondence, for example, adopt user terminal ownership place AC and AC internetwork roaming tunnel, roaming place logic interfacing T-P to represent.Like this, roaming information is { MAC, T-P}.Roaming information for STA1, STA2 is respectively: { MAC1, T-P1}, { MAC2, T-P2}.
Described multicast forwarding information memory cell 42, the user preserves the user multicast forwarding information of roaming user terminal, multicast forwarding information be multicast service, and the accessing position information of user terminal between corresponding relation.Here, multicast service is that (S represents multicast source address for S, G) information, and G represents multicast group address.The accessing position information of user terminal is exactly the accessing position information of roaming user terminal access roaming ground AC in fact, for example, can adopt the logic interfacing W-P of roaming user terminal access roaming ground AC to represent.Like this, multicast forwarding information be (S, G), W-P}.Multicast forwarding information for STA1, STA2 be (S, G), W-P}.
Described multicast user's maintenance of information unit 43, be used for preserving and safeguard multicast user's information, multicast user's information be multicast service, user terminal unique identification information, and the accessing position information of user terminal between corresponding relation.Here, described multicast service is that (S represents multicast source address for S, G) information, and G represents multicast group address.Described user terminal unique identification information can be the MAC Address of user terminal.The accessing position information of user terminal is exactly the accessing position information of roaming user terminal access roaming ground AC in fact, for example, can adopt the logic interfacing W-P information of roaming user terminal access roaming ground AC to represent.In view of this, multicast user's information that AC safeguards can adopt and safeguard (S, G), MAC, W-P} information is represented.Multicast user's information for STA1, STA2 be respectively (S, G), MAC1, W-P}, (S, G), MAC2, W-P}.
Here, multicast user's information that multicast user's maintenance of information unit is safeguarded be according to eavesdropping IGMP in real time join message, IGMP leave message, real-time update multicast user's information promptly, when intercepting IGMP and join message, is added multicast user's information; When user terminal need be cancelled its multicast service that customizes,, delete corresponding multicast user's information according to the IGMP leave message that intercepts.Like this, guaranteed the real-time update of multicast user's information.
Described judgement transmitting element 44, be used for when receiving multicast service, according to multicast user's information of multicast user's maintenance of information unit 43 storage (S, G), MAC, W-P}, (S is when G) identical will more than one user terminals customization same multicast business, roaming information { MAC according to 41 preservations of roaming information memory cell, T-P} only keeps the multicast service from one of them network interface, multicast service is continued to transmit to the user terminal of the described multicast service of customization then.
As shown in Figure 3 in the system, judgement transmitting element 44 in the 3rd access controller (roaming place access controller) 40 is when receiving multicast service, multicast user's information { (S according to 43 storages of multicast user's maintenance of information unit, G), MAC1, W-P1}, { (S, G), MAC2, W-P2}, find to exist the same multicast service (S of 2 customizations, G) user terminal, and these terminal uses are roaming user terminal, i.e. STA1, STA2, at this moment, 44 of judgement transmitting elements in the access controller are according to STA1, roaming information { the MAC1 of STA2, T-P1}, { the roaming tunnel logic interfacing T-P of any one roaming user terminal comes receiving multicast business only to need to select wherein for MAC2, T-P2}, here, suppose, select T-P1, and then according to multicast forwarding information { (S, G), W-P} continues user terminal STA1 downstream, the STA2 forwarding multicasting is professional to get final product; And block for the multicast service from the roaming tunnel logic interfacing T-P2 of roaming user terminal STA2, that is, directly abandoning, user terminal is transmitted no longer downstream.
System shown in Figure 6 for example promptly in system shown in Figure 3, has increased by the 3rd user terminal 80 (hereinafter to be referred as STA3) again.STA3 is the LUT of the 3rd access controller 40 place networks, and STA3 customized the identical multicast service of the multicast service that customized with STA1, STA2 (S, G).
At this moment, the 3rd access controller 40 is the ownership place access controller for STA3, and is the roaming place access controller for STA1, STA2.Then the access controller functional structure is similar among the structure of the 3rd access controller 40 and Fig. 3, comprising: roaming information memory cell 41, multicast forwarding information memory cell 42, multicast user's maintenance of information unit 43, and judge transmitting element 44.
Difference is, multicast user's maintenance of information unit 43, and not only the multicast service to roamer's customization carries out multicast user's maintenance of information, that is, safeguarded STA1, STA2 multicast user's information (S, G), MAC1, W-P}, (S, G), MAC2, W-P} also safeguards multicast user's information of LUT STA3, promptly preserved { (S, G), MAC3, W-P}.
In sum, the described method of the embodiment of the invention, system and access controller when having roaming user terminal in the network, have solved the problem of multicast replication, thereby conserve system resources improves the multicast service transmitting efficiency.
The method of realizing group broadcasting of a kind of wireless roaming user of the present invention and access controller, be not restricted to listed utilization in specification and the execution mode, it can be applied to various suitable the present invention's field fully, for those skilled in the art, can easily realize additional advantage and make amendment, therefore under the situation of the spirit and scope of the universal that does not deviate from claim and equivalency range and limited, the examples shown that the present invention is not limited to specific details, representational equipment and illustrates here and describe.
Claims (10)
1. the method for realizing group broadcasting of a wireless roaming user is characterized in that comprising the steps:
(A) its multicast user's information is set up and safeguarded to access controller to the user terminal of customization multicast service, wherein, described multicast user's information is the accessing position information of multicast service, user terminal unique identification information, user terminal, between corresponding relation; For roaming user terminal, the accessing position information of described user terminal is the logic interfacing information that roaming user terminal inserts access controller;
(B) when the access controller receiving multicast business, when having the user terminal of customization same multicast business more than 1 according to described multicast user's INFORMATION DISCOVERY, only select to receive this multicast service, and send to the user terminal that has customized this multicast service from a network interface; Wherein said network interface comprises described logic interfacing.
2. method according to claim 1 is characterized in that: described multicast service is that (S represents multicast source address for S, G) information, and G represents multicast group address; Described user terminal unique identification information is the MAC Address of user terminal.
3. method according to claim 1 is characterized in that described step (A) further comprises the steps:
When user terminal customization multicast service, described multicast user's information is set up and preserved to access controller;
When described user terminal was cancelled the multicast service of its customization, access controller was deleted corresponding multicast user's information from multicast user's information of being safeguarded.
4. method according to claim 3 is characterized in that: described step (B) further comprises the steps:
(B11), when the access controller receiving multicast business, the user terminal that has customization same multicast business more than 1 according to described multicast user's INFORMATION DISCOVERY, and when being the roamer, select only to select to come receiving multicast business according to the accessing position information of the user terminal in the roaming information, continue to send this multicast service according to multicast forwarding information again to the roaming user terminal of this multicast service of customization from the roaming tunnel logic interfacing of a roaming user terminal;
(B12), the multicast service that will receive from the roaming tunnel logic interfacing of the roaming user terminal beyond the roaming tunnel logic interfacing of the described roaming user terminal of having selected directly abandons.
5. method according to claim 3 is characterized in that described step (B) further comprises the steps:
(B21), when the access controller receiving multicast business, when having the roaming user terminal of customization same multicast business and LUT according to described multicast user's INFORMATION DISCOVERY, only select local interface to come receiving multicast business, continue again to send this multicast service to the roaming user terminal and the LUT of this multicast service of customization;
(B22), the multicast service that will receive from the roaming tunnel logic interfacing of all roaming user terminals directly abandons.
6. an access controller comprises, roaming information memory cell, multicast forwarding information memory cell; It is characterized in that also comprising: multicast user's maintenance of information unit, and judge transmitting element;
Described multicast user's maintenance of information unit is used to preserve and multicast user's information of maintenance customer's terminal, multicast user's information be multicast service, user terminal unique identification information, and the accessing position information of user terminal between corresponding relation;
Described judgement transmitting element, be used for when receiving multicast service, when there is the user terminal of customization same multicast business more than 1 in multicast user's INFORMATION DISCOVERY of the user terminal of preserving according to described multicast user's maintenance of information unit, only select to receive this multicast service and send to the user terminal of this multicast service of customization from a network interface.
7. access controller according to claim 6 is characterized in that:
Described multicast user's maintenance of information unit is further used for preserving described multicast user's information according to the user terminal customization message that multicast service sent; Cancel the message that multicast service sent that it customizes according to described user terminal, delete corresponding multicast user's information.
8. access controller according to claim 7 is characterized in that:
Described roaming information memory cell is used to preserve the roaming information of roaming user terminal, roaming information be the user terminal unique identification information, and the accessing position information of user terminal between corresponding relation;
Described multicast forwarding information memory cell is used to preserve the user multicast forwarding information of roaming user terminal, multicast forwarding information be multicast service, and the accessing position information of user terminal between corresponding relation.
9. access controller according to claim 8 is characterized in that:
Described judgement transmitting element, when being further used for receiving multicast service, there is the user terminal of customization same multicast business more than 1 in multicast user's INFORMATION DISCOVERY of the user terminal of preserving according to described multicast user's maintenance of information unit, and when being the roamer, select only to select to come receiving multicast business according to the accessing position information of the user terminal in the roaming information of preserving in the roaming information memory cell, continue to send this multicast service according to the multicast forwarding information of preserving in the multicast forwarding information memory cell again to the roaming user terminal of this multicast service of customization from the roaming tunnel logic interfacing of a roaming user terminal.
10. access controller according to claim 7 is characterized in that:
Described judgement transmitting element, be further used for when receiving multicast service, when multicast user's INFORMATION DISCOVERY of the user terminal of preserving according to described multicast user's maintenance of information unit exists the roaming user terminal of customization same multicast business and LUT, only select the local interface receiving multicast business and send to the roaming user terminal and the LUT of this multicast service of customization.
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| CN2006101437069A CN1937848B (en) | 2006-11-02 | 2006-11-02 | Wireless roaming user multicast realizing method and access controller |
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| CN105813201B (en) | 2014-12-30 | 2019-04-09 | 中兴通讯股份有限公司 | Data transmission method and device in a kind of cordless communication network |
| CN105429887B (en) * | 2015-11-04 | 2018-07-06 | 上海斐讯数据通信技术有限公司 | The method and system of internet group management protocol snooping processing during a kind of website roaming |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6473413B1 (en) * | 1999-06-22 | 2002-10-29 | Institute For Information Industry | Method for inter-IP-domain roaming across wireless networks |
| CN1663312A (en) * | 2002-06-20 | 2005-08-31 | 艾利森电话股份有限公司 | Multimedia broadcast/multicast service (MBMS) support in UTRAN |
| CN1691622A (en) * | 2004-04-28 | 2005-11-02 | 联想(北京)有限公司 | Method of resource discovery in dynamic network environment |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6473413B1 (en) * | 1999-06-22 | 2002-10-29 | Institute For Information Industry | Method for inter-IP-domain roaming across wireless networks |
| CN1663312A (en) * | 2002-06-20 | 2005-08-31 | 艾利森电话股份有限公司 | Multimedia broadcast/multicast service (MBMS) support in UTRAN |
| CN1691622A (en) * | 2004-04-28 | 2005-11-02 | 联想(北京)有限公司 | Method of resource discovery in dynamic network environment |
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