CN105472568A

CN105472568A - Wireless multicast access method, gateway and access point

Info

Publication number: CN105472568A
Application number: CN201410344819.XA
Authority: CN
Inventors: 涂聪; 林尤喜
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2014-07-18
Filing date: 2014-07-18
Publication date: 2016-04-06
Anticipated expiration: 2034-07-18
Also published as: CN105472568B

Abstract

The invention discloses a wireless multicast access method which comprises the steps of receiving an Internet group management protocol (IGMP) request from a mobile terminal by a gateway, and acquiring the address of the mobile terminal and the address of multicast data which are requested by the mobile terminal according to the IGMP request; acquiring a subscriber table item by the gateway, wherein the subscriber table item comprises the address of the multicast data and a mobile terminal address set, and the address of the mobile terminal belongs to the mobile terminal address set; and transmitting the subscriber table item to a first access point (AP) and a second access point (AP) by the gateway, wherein the first AP is correlated with the mobile terminal and the second AP is different from the first AP. Furthermore the invention discloses a gateway and an access point.

Description

A kind of wireless multicast cut-in method and gateway, access point

Technical field

The present invention relates to communication technical field, particularly relate to a kind of wireless multicast cut-in method and gateway, access point.

Background technology

Multicast service is widely spread, and mobile terminal based on multicast service receiving multicast data, thus can provide data, services efficiently to user.

Usually, the first access point is associated with (English: accesspoint at mobile terminal, abbreviation: time AP), mobile terminal can from an AP receiving multicast data, when mobile terminal goes to associate with an AP and is associated with the 2nd AP, mobile terminal can continue to receive this multicast packet from the 2nd AP.Particularly, when mobile terminal is associated with the 2nd AP, it is (English: InternetGroupManagementProtocol that mobile terminal needs to send Internet Group Management Protocol to gateway, abbreviation: IGMP) ask, multicast packet is sent to the 2nd AP based on this IGMP request by gateway again, then by the 2nd AP, multicast packet is given to mobile terminal.

But there is following technical problem in above-mentioned technology:

When mobile terminal goes to associate with an AP and is associated with the 2nd AP, because mobile terminal generally can not send IGMP request immediately after being associated with the 2nd AP, and it is longer to ask gateway to receive the time consumed between this IGMP request from mobile terminal transmission IGMP, causes mobile terminal cannot receive multicast packet from the 2nd AP fast.

Summary of the invention

The present invention, by providing a kind of wireless multicast cut-in method, solves mobile terminal when going to associate with an AP and be associated with the 2nd AP, rotates the technical problem that cannot receive multicast packet fast from the 2nd AP.

First aspect, the invention provides a kind of wireless multicast cut-in method, described method comprises:

Gateway receives asks from the Internet Group Management Protocol IGMP of mobile terminal, and according to described IGMP acquisition request the address of the address of mobile terminal and the multicast packet of described mobile terminal request;

Described gateway obtains user's list item, and described user's list item comprises address and the mobile terminal address set of described multicast packet, and the address of described mobile terminal belongs to described mobile terminal address set;

Described user's list item is sent to an AP and the 2nd AP by described gateway, and wherein, a described AP is the AP that described mobile terminal is associated with, and described 2nd AP is different from a described AP.

In conjunction with first aspect, in the first possible execution mode of first aspect, after described gateway obtains user's list item, described method also comprises:

Described gateway obtains multicast list, described multicast list comprises address and the port-mark set of the described multicast packet in described user's list item, described port-mark set is the set of at least one port-mark, the port that any one port-mark at least one port-mark described identifies is the port that described gateway is directly connected with an AP in AP set, described AP set is the set of the AP associated with the mobile terminal of at least one address designation in described mobile terminal address set, wherein, described AP set comprises a described AP and does not comprise described 2nd AP, described port-mark set comprises the first port-mark, described first port-mark is for identifying the first port of described gateway, described first port is the port that described gateway is directly connected with a described AP,

Described gateway receives the first multicast message, and the address of the multicast packet of described first multicast message is the address of the multicast packet of described mobile terminal request;

The port that described gateway is identified by each port-mark in described port-mark set according to described multicast list sends described first multicast message to each AP in described AP set;

Described gateway determines that described mobile terminal goes association from a described AP and associates described 2nd AP;

Described gateway revises described port-mark set, wherein, described gateway is revised described port-mark set and is comprised described gateway add the second port-mark in described port-mark set, described second port-mark is for identifying the second port of described gateway, and described second port is the port that described gateway is directly connected with described 2nd AP;

Described gateway receives the second multicast message, and the address of the multicast packet of described second multicast message is the address of the multicast packet of described mobile terminal request;

The port that described gateway is identified by each port-mark in described amended port-mark set according to described multicast list sends described second multicast message to each AP in new AP set, and described new AP set comprises described 2nd AP.

In conjunction with the first possible execution mode of first aspect, in the execution mode that the second of first aspect is possible, described gateway determine described mobile terminal from a described AP go association and after associating described 2nd AP, described method also comprises:

That described gateway determines the mobile terminal association that any one address in described mobile terminal address set identifies is all other AP except a described AP;

Described gateway is revised described port-mark set and is also comprised: described gateway deletes described first port-mark in described port-mark set.

Second aspect, the invention provides a kind of wireless multicast cut-in method, described method comprises:

AP receives user's list item that gateway is sent, described user's list item comprises address and the mobile terminal address set of multicast packet, described mobile terminal address set is the set of the address of at least one mobile terminal of the address of asking described multicast packet, at least one mobile terminal described comprises the first mobile terminal, and described first mobile terminal is associated with described AP;

Described AP receives the first multicast message, and the address of the multicast packet of described first multicast message is the address of the multicast packet in described user's list item;

Described AP sends described first multicast message according to described user's list item to the mobile terminal being associated with described AP in described mobile terminal address set.

In conjunction with second aspect, in the first possible execution mode of second aspect, described mobile terminal address set also comprises the address of the second mobile terminal, and described second mobile terminal is not associated with described AP, and described method also comprises:

After described AP sends described first multicast message, described AP determines that described second mobile terminal is associated with described AP;

Described AP receives the second multicast message, and the address of the multicast packet of described second multicast message is the address of the multicast packet in described user's list item;

Described AP sends described second multicast message according to described user's list item to the multiple mobile terminals being associated with described AP in described mobile terminal address set, and described multiple mobile terminal comprises described first mobile terminal and described second mobile terminal.

The third aspect, the invention provides a kind of gateway, and described gateway comprises:

First receiving element, asks for the Internet Group Management Protocol IGMP received from mobile terminal, and according to described IGMP acquisition request the address of the address of mobile terminal and the multicast packet of described mobile terminal request;

First obtains unit, and for obtaining user's list item, described user's list item comprises address and the mobile terminal address set of described multicast packet, and the address of described mobile terminal belongs to described mobile terminal address set;

First transmitting element, for described user's list item is sent to an AP and the 2nd AP, wherein, a described AP is the AP that described mobile terminal is associated with, and described 2nd AP is different from a described AP.

In conjunction with the third aspect, in the first possible execution mode of the third aspect, described gateway also comprises:

Second obtains unit, for obtaining multicast list, described multicast list comprises address and the port-mark set of the described multicast packet in described user's list item, described port-mark set is the set of at least one port-mark, the port that any one port-mark at least one port-mark described identifies is the port that described gateway is directly connected with an AP in AP set, described AP set is the set of the AP associated with the mobile terminal of at least one address designation in described mobile terminal address set, wherein, described AP set comprises a described AP and does not comprise described 2nd AP, described port-mark set comprises the first port-mark, described first port-mark is for identifying the first port of described gateway, described first port is the port that described gateway is directly connected with a described AP,

Second receiving element, for receiving the first multicast message, the address of the multicast packet of described first multicast message is the address of the multicast packet of described mobile terminal request;

Second transmitting element, sends described first multicast message for the port identified by each port-mark in described port-mark set according to described multicast list to each AP in described AP set;

First determining unit, for determining that described mobile terminal goes associate and associate described 2nd AP from a described AP;

Amendment unit, for revising described port-mark set, wherein, described gateway is revised described port-mark set and is comprised described gateway add the second port-mark in described port-mark set, described second port-mark is for identifying the second port of described gateway, and described second port is the port that described gateway is directly connected with described 2nd AP;

3rd receiving element, for receiving the second multicast message, the address of the multicast packet of described second multicast message is the address of the multicast packet of described mobile terminal request;

3rd transmitting element, port for being identified by each port-mark in described amended port-mark set according to described multicast list sends described second multicast message to each AP in new AP set, and described new AP set comprises described 2nd AP.

In conjunction with the first possible execution mode of the third aspect, in the execution mode that the second of the third aspect is possible, described gateway also comprises:

Second determining unit, for determining that at described gateway described mobile terminal goes association and after associating described 2nd AP, that determine the mobile terminal association that any one address in described mobile terminal address set identifies is all other AP except a described AP from a described AP;

Described amendment unit also for: delete described first port-mark in described port-mark set.

Fourth aspect, the invention provides a kind of access point AP, described AP comprises:

First receiving element, for receiving user's list item that gateway is sent, described user's list item comprises address and the mobile terminal address set of multicast packet, described mobile terminal address set is the set of the address of at least one mobile terminal of the address of asking described multicast packet, at least one mobile terminal described comprises the first mobile terminal, and described first mobile terminal is associated with described AP;

Second receiving element, for receiving the first multicast message, the address of the multicast packet of described first multicast message is the address of the multicast packet in described user's list item;

First transmitting element, for sending described first multicast message according to described user's list item to the mobile terminal being associated with described AP in described mobile terminal address set.

In conjunction with fourth aspect, in the first possible execution mode of fourth aspect, described mobile terminal address set also comprises the address of the second mobile terminal, and described second mobile terminal is not associated with described AP, and described AP also comprises:

First determining unit, after sending described first multicast message, determines that described second mobile terminal is associated with described AP;

3rd receiving element, for receiving the second multicast message, the address of the multicast packet of described second multicast message is the address of the multicast packet in described user's list item;

Second transmitting element, for sending described second multicast message according to described user's list item to the multiple mobile terminals being associated with described AP in described mobile terminal address set, described multiple mobile terminal comprises described first mobile terminal and described second mobile terminal.

5th aspect, the invention provides a kind of gateway, and described gateway comprises:

Port;

Memory, for program code stored;

Processor, is connected with described port and described memory, for reading described program code from described memory, to perform:

Asked by the Internet Group Management Protocol IGMP of described port accepts from mobile terminal, and according to described IGMP acquisition request the address of the address of mobile terminal and the multicast packet of described mobile terminal request; Obtain user's list item, described user's list item comprises address and the mobile terminal address set of described multicast packet, and the address of described mobile terminal belongs to described mobile terminal address set; Described user's list item is sent to an AP and the 2nd AP, wherein, a described AP is the AP that described mobile terminal is associated with, and described 2nd AP is different from a described AP.

In conjunction with the 5th aspect, in the first the possible execution mode in the 5th, described processor also for:

After acquisition user list item, obtain multicast list, described multicast list comprises address and the port-mark set of the described multicast packet in described user's list item, described port-mark set is the set of at least one port-mark, the port that any one port-mark at least one port-mark described identifies is the port that described gateway is directly connected with an AP in AP set, described AP set is the set of the AP associated with the mobile terminal of at least one address designation in described mobile terminal address set, wherein, described AP set comprises a described AP and does not comprise described 2nd AP, described port-mark set comprises the first port-mark, described first port-mark is for identifying the first port of described gateway, described first port is the port that described gateway is directly connected with a described AP, by described port accepts first multicast message, the address of the multicast packet of described first multicast message is the address of the multicast packet of described mobile terminal request, described first multicast message is sent to each AP in described AP set according to the port that described multicast list is identified by each port-mark in described port-mark set, determine that described mobile terminal goes association from a described AP and associates described 2nd AP, revise described port-mark set, wherein, described gateway is revised described port-mark set and is comprised described gateway add the second port-mark in described port-mark set, described second port-mark is for identifying the second port of described gateway, and described second port is the port that described gateway is directly connected with described 2nd AP, by described port accepts second multicast message, the address of the multicast packet of described second multicast message is the address of the multicast packet of described mobile terminal request, described second multicast message of each AP transmission in being gathered to new AP by the port that each port-mark in described amended port-mark set identifies according to described multicast list, described new AP set comprises described 2nd AP.

In conjunction with the first possible execution mode of the 5th aspect, in the execution mode that the second in the 5th is possible, described processor also for:

Determining that described mobile terminal goes association and after associating described 2nd AP, that determine the mobile terminal association that any one address in described mobile terminal address set identifies is all other AP except a described AP from a described AP; The set of described amendment described port-mark also comprises: delete described first port-mark in described port-mark set.

6th aspect, the invention provides a kind of access point AP, described AP comprises:

Cable port and radio port;

Memory, for program code stored;

Processor, is connected with described cable port, described radio port and described memory, for reading described program code from described memory, to perform:

By user's list item that described cable port reception gateway is sent, described user's list item comprises address and the mobile terminal address set of multicast packet, described mobile terminal address set is the set of the address of at least one mobile terminal of the address of asking described multicast packet, at least one mobile terminal described comprises the first mobile terminal, and described first mobile terminal is associated with described AP; Receive the first multicast message by described cable port, the address of the multicast packet of described first multicast message is the address of the multicast packet in described user's list item; Described first multicast message is sent to the mobile terminal being associated with described AP in described mobile terminal address set by described radio port according to described user's list item.

In conjunction with the 6th aspect, in the first the possible execution mode in the 6th, described mobile terminal address set also comprises the address of the second mobile terminal, and described second mobile terminal is not associated with described AP, described processor also for:

After described first multicast message of transmission, determine that described second mobile terminal is associated with described AP; Receive the second multicast message by described cable port, the address of the multicast packet of described second multicast message is the address of the multicast packet in described user's list item; Send described second multicast message to the multiple mobile terminals being associated with described AP in described mobile terminal address set by described radio port according to described user's list item, described multiple mobile terminal comprises described first mobile terminal and described second mobile terminal.

The present invention at least has following technique effect or advantage:

In the present embodiment, when mobile terminal goes to associate with an AP and is associated with the 2nd AP, gateway according to this gateway AP that directly connect after upgrading and can obtain corresponding multicast list with the incidence relation between the mobile terminal that these AP associate and user's list item, and the multicast packet of terminal being asked sends to the AP needing receiving multicast data comprising the 2nd AP.Because in this present embodiment, gateway can according to the change corresponding modify multicast list of incidence relation without the need to the IGMP request that mobile terminal receive sends after roaming, mobile terminal can be made can to receive this multicast packet from the 2nd AP rapidly, thus solve mobile terminal when going to associate with an AP and be associated with the 2nd AP, rotate the technical problem that cannot receive multicast packet fast from the 2nd AP, achieve the technique effect rotating and can receive multicast packet fast from the 2nd AP.

Accompanying drawing explanation

In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

Fig. 1 is that in the embodiment of the present invention, mobile terminal A removes the scene schematic diagram before associating from an AP;

Fig. 2 is after mobile terminal A goes association from an AP in the embodiment of the present invention and is associated with the scene schematic diagram of the 2nd AP;

Fig. 3 is the flow chart of the first execution mode of wireless multicast cut-in method in the embodiment of the present invention one;

Fig. 4 is the flow chart of the second execution mode of wireless multicast cut-in method in the embodiment of the present invention one;

Fig. 5 is the flow chart of the third execution mode of wireless multicast cut-in method in the embodiment of the present invention one;

Fig. 6 is the flow chart of the first execution mode of wireless multicast cut-in method in the embodiment of the present invention two;

Fig. 7 is the flow chart of the second execution mode of wireless multicast cut-in method in the embodiment of the present invention two;

Fig. 8 is the structural representation of gateway in the embodiment of the present invention three;

Fig. 9 is the structural representation of access point in the embodiment of the present invention four;

Figure 10 is the structural representation of gateway in the embodiment of the present invention five;

Figure 11 is the structural representation of access point in the embodiment of the present invention six.

Embodiment

The embodiment of the present invention, by providing a kind of wireless multicast cut-in method, solves mobile terminal when going to associate with an AP and be associated with the 2nd AP, rotates the technical problem that cannot receive multicast packet fast from the 2nd AP.

For making the object of one embodiment of the invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.

Embodiment one

Present embodiments provide a kind of wireless multicast cut-in method.As shown in Figure 1, gateway is connected with the direct of each AP in multiple AP (such as: an AP, the 2nd AP, the 3rd AP).Direct connection that is that above-mentioned direct connection refers to physics or logic.Such as, gateway can by the connection of each AP in optical fiber or netting twine and described multiple AP; Or gateway can be connected with each AP in described multiple AP by tunnel; Or be connected with some AP in described multiple AP by optical fiber or netting twine, and be connected with remaining AP by tunnel.

As shown in Figure 3, described wireless multicast cut-in method, comprising:

Step 11: the IGMP that gateway receives from the first mobile terminal asks, and according to the address of the address of this first mobile terminal of IGMP acquisition request with the multicast packet of this first mobile terminal request.

For example, mobile terminal can be the terminal equipments such as smart mobile phone, panel computer, vehicle-mounted computer.

For example, described IGMP request can be: IGMP report is (English: Report) request or IGMP add (English: Join) to ask.

For example, the address of mobile terminal can be: the medium access control of this mobile terminal is (English: mediaaccesscontrol, abbreviation: MAC) Internet protocol (English: InternetProtocol, the abbreviation: IP) address of address or this mobile terminal.

For example, multicast packet can be: video multicast data or audio group multicast data or other any multicast packets.

For example, the address of multicast packet can be: group address in IGMP request (English: GroupAddress) in field multicast address; Or in IGMP request in group address field multicast address and IGMP request in source address (English: the combination of unicast address SourceAddress) in field.

Step 12: gateway obtains user's list item, and user's list item comprises address and the mobile terminal address set of the multicast packet of the first mobile terminal request, and the address of this first mobile terminal belongs to mobile terminal address set.

The set of the address of at least one mobile terminal of the multicast packet that the address that the mobile terminal address set in user's list item is the multicast packet in this user's list item of request identifies.Mobile terminal address set in user's list item that gateway obtains according to the request of the first mobile terminal is the set of the address of at least one mobile terminal of this multicast packet of request.

If gateway has preserved user's list item of the address comprising this multicast packet, and do not comprise the address of this mobile terminal in the mobile terminal address set in this user's list item, then add the address of this mobile terminal in the mobile terminal address set of gateway in this user's list item to obtain this user's list item.If if gateway does not preserve user's list item of the address comprising this multicast packet, then gateway creates user's list item, this user's list item comprises the address of this multicast packet and only comprises an element, the i.e. address of this mobile terminal, mobile terminal address set, gateway preserves user's list item of this new establishment.

For example, as shown in Figure 1, for the first mobile terminal for terminal A, this multicast packet has all been applied at mobile terminal A, mobile terminal B and mobile terminal D, and mobile terminal C is not when applying for this multicast packet, described mobile terminal address set comprises the address of the address of mobile terminal A, the address of mobile terminal B and mobile terminal D, does not comprise the address of terminal C.

Step 13a: user's list item is sent to an AP and the 2nd AP by gateway, wherein, an AP is the AP that the first mobile terminal is associated with, and the 2nd AP is different from an AP.

General in a wlan, the AP that a mobile terminal is only associated with, the first mobile terminal be associated with an AP then the first mobile terminal be not associated with the 2nd AP.

User's list item can be issued the whole AP be directly connected with this gateway by gateway, such as an AP, the 2nd AP and the 3rd AP.

In the present embodiment, the AP of the mobile terminal of association request multicast packet, as an AP, with the AP of the mobile terminal of not associated this multicast packet of request, as the 2nd AP, capital receives user's list item that gateway sends, with the multicast packet making the 2nd AP can send its request to this mobile terminal after this mobile terminal is associated with the 2nd AP, and without the need to waiting for the IGMP request that this mobile terminal sends.

Further, as shown in Figure 4, after step S102, described method can also comprise:

Step 13b: gateway obtains multicast list, wherein, multicast list comprises address and the port-mark set of the multicast packet in user's list item, port-mark set is the set of at least one port-mark, the port that any one port-mark at least one port-mark identifies is the port that gateway is directly connected with an AP in AP set, AP set is the set of the AP associated with the mobile terminal of at least one address designation in mobile terminal address set, AP set comprises an AP and does not comprise the 2nd AP, port-mark set comprises the first port-mark, first port-mark is for identifying the first port of gateway, first port is the port that gateway is directly connected with an AP.

Above-mentioned port can be physical port or tunnel, and accordingly, port-mark can be physical port mark or Tunnel Identifier.

Above-mentioned AP set is only for illustration of the relation between port-mark set and mobile terminal address set, and this AP set does not need to preserve in a gateway.

This gateway is integrated with WLAN controller, thus preserves the incidence relation between the AP be directly connected with this gateway and the mobile terminal associated with these AP.Gateway each AP also preserved in the AP be directly connected with this gateway is connected to the corresponding relation of which port of this gateway.

For example, as shown in Figure 1, gateway comprises multiple port, and gateway is connected with an AP by the first port, and gateway is connected with the 2nd AP by the second port, and gateway is connected with the 3rd AP by the 3rd port.Gateway preserves the first port-mark for identifying the first port, for identifying the second port-mark of the second port, corresponds to an AP respectively, the 2nd AP, the mapping of the 3rd AP for the 3rd port-mark identifying the 3rd port.In above-mentioned mapping, AP can represent with the address of AP mark or AP.Mobile terminal A and mobile terminal B is associated with an AP, and mobile terminal C is associated with the 2nd AP, and mobile terminal D is associated with the 3rd AP.The address of address and mobile terminal B that gateway preserves mobile terminal A corresponds to the mapping of an AP, and the address of mobile terminal C corresponds to the mapping of the 2nd AP, and the address of mobile terminal D corresponds to the mapping of the 3rd AP.In above-mentioned mapping, AP can represent with the address of AP mark or AP.All request the multicast packet in user's list item at mobile terminal A, mobile terminal B and mobile terminal D, mobile terminal C is not when asking this multicast packet, comprise an AP and the 3rd AP in described AP set but do not comprise the 2nd AP, described port-mark set comprises the first port-mark and the 3rd port-mark.

Step 14b: gateway receives the first multicast message, the address of the multicast packet of the first multicast message is the address of the multicast packet of mobile terminal request.

For example, gateway receiving group message A, the address of the multicast packet of multicast message A is the first mobile terminal, i.e. the address of the multicast packet of mobile terminal A request.

Step 15b: the port that gateway is identified by each port-mark in port-mark set according to multicast list sends the first multicast message to each AP in AP set.

For example, as shown in Figure 1, owing to comprising the first port-mark and the 3rd port-mark in described port-mark set, then gateway is by the first port and the 3rd this multicast message of port multicast A.Because the first port connects an AP, the 3rd port connects the 3rd AP, an AP and the 3rd AP can both receive this multicast message A.Now, mobile terminal A and mobile terminal B just can receive multicast message A from an AP, thus obtains the multicast packet in multicast message A; Mobile terminal D just can receive multicast message A from the 3rd AP, thus obtains the multicast packet in multicast message A.

Gateway obtains the forwarding that multicast list can simplify multicast message, does not need to search corresponding port according to user's list item again after receiving multicast message.Further, if gateway adopts hardware chip (English: chip) forwarding multicasting message, this multicast list can be stored in hardware chip with the fast-forwarding utilizing this hardware chip to realize multicast message by gateway.

Step 16b: gateway determines that the first mobile terminal goes association from an AP and associates the 2nd AP.

For example, as shown in Figure 2, mobile terminal A can utilize radio roaming (English: roaming) technology, keep IP address constant, be associated with the 2nd AP.Said process can be called that the first mobile terminal roams into the 2nd AP from an AP.Because the IP address after mobile terminal roaming is constant, mobile terminal generally can not send IGMP request immediately after roaming.After first mobile terminal roaming to the 2nd AP, the incidence relation between the corresponding renewal of gateway its AP be directly connected with this gateway preserved and the mobile terminal associated with these AP.

Step 17b: gateway amendment port-mark set, wherein, the set of gateway amendment port-mark comprises gateway and add the second port-mark in port-mark set, and the second port-mark is for identifying the second port of gateway, and the second port is the port that gateway is directly connected with the 2nd AP.

For example, after first mobile terminal roams into the 2nd AP from an AP, the address that incidence relation between the AP that gateway is preserved and the mobile terminal that associates with these AP is updated to mobile terminal B corresponds to the mapping of an AP, the address of mobile terminal A and the address of mobile terminal C correspond to the mapping of the 2nd AP, and the address of mobile terminal D corresponds to the mapping of the 3rd AP.All request the multicast packet in user's list item at mobile terminal A, mobile terminal B and mobile terminal D, mobile terminal C is not when asking this multicast packet, in new AP set, comprise an AP, the 2nd AP and the 3rd AP.The port-mark that one AP, the 2nd AP and the 3rd AP are corresponding is the first port-mark, the second port-mark and the 3rd port-mark.Gateway adds the second port-mark in former port-mark set (comprising the first port-mark and the 3rd port-mark), obtains comprising the first port-mark, the amended port-mark set of the second port-mark and the 3rd port-mark.

Step 18b: gateway receives the second multicast message, the address of the multicast packet of the second multicast message is the address of the multicast packet of mobile terminal request.

For example, as shown in Figure 2, gateway receiving group message B, the address of the multicast packet of multicast message B is the address of the multicast packet that mobile terminal A asks, and namely multicast message B is identical with the address of the multicast packet of multicast message A.

Step 19b: the port that gateway is identified by each port-mark in amended port-mark set according to multicast list sends the second multicast message to each AP in new AP set, new AP set comprises the 2nd AP.

For example, as shown in Figure 2, owing to containing the second port-mark in amended port-mark set, then gateway is by second this multicast message of port multicast B.Because the second port connects the 2nd AP, the 2nd AP can receive this multicast message B.Now, mobile terminal A just can receive multicast message B from the 2nd AP, thus obtains the multicast packet in multicast message B.

Gateway obtains the forwarding that multicast list can simplify multicast message, does not need to search corresponding port according to user's list item again after receiving multicast message.Further, if gateway adopts hardware chip forwarding multicasting message, this multicast list can be stored in hardware chip with the fast-forwarding utilizing this hardware chip to realize multicast message by gateway.

In the present embodiment, when described multicast packet is video multicast data, when mobile terminal goes to associate with an AP and is associated with the 2nd AP, mobile terminal can receive this video multicast data from the 2nd AP rapidly, thus obviate or mitigates occur video playback mosaic (English: mosaic) or card (English: phenomenon frozen).

Further, as shown in Figure 5, after step 16b, described method also comprises:

Step 17c: that the mobile terminal that any one address in the set of gateway determination mobile terminal address identifies associates is all other AP except an AP; Now, the set of gateway amendment port-mark also comprises: gateway deletes the first port-mark in port-mark set.

For example, as shown in Figure 2, if after mobile terminal B goes association from an AP, first mobile terminal just roams into the 2nd AP from an AP, the address of address and mobile terminal C that the incidence relation between the AP that gateway is preserved and the mobile terminal that associates with these AP is updated to mobile terminal A corresponds to the mapping of the 2nd AP, and the address of mobile terminal D corresponds to the mapping of the 3rd AP.Due to without any mobile terminal association the one AP, in the incidence relation between the AP that gateway is preserved and the mobile terminal that associates with these AP, do not comprise the mapping of an AP.All request the multicast packet in user's list item at mobile terminal A and mobile terminal D, mobile terminal C is not when asking this multicast packet, comprise the 2nd AP and the 3rd AP in new AP set, namely new AP set does not comprise an AP.The port-mark that 2nd AP and the 3rd AP is corresponding is the second port-mark and the 3rd port-mark.Gateway adds the second port-mark and deletes the first port-mark in former port-mark set (comprising the first port-mark and the 3rd port-mark), obtains the amended port-mark set comprising the second port-mark and the 3rd port-mark.In another example, mobile terminal B no longer asks this multicast packet, and this mobile terminal B sends IGMP and leaves (English: Leave) message, the mobile terminal address set in user's list item comprises the address of mobile terminal A and the address of mobile terminal D.Afterwards, first mobile terminal roams into the 2nd AP from an AP, the address that incidence relation between the AP that gateway is preserved and the mobile terminal that associates with these AP is updated to mobile terminal B corresponds to the mapping of an AP, the address of mobile terminal A and the address of mobile terminal C correspond to the mapping of the 2nd AP, and the address of mobile terminal D corresponds to the mapping of the 3rd AP.Multicast packet, mobile terminal B and mobile terminal C that mobile terminal A and mobile terminal D requests in user's list item do not ask this multicast packet, comprise the 2nd AP and the 3rd AP in new AP set, and namely new AP set does not comprise an AP.The port-mark that 2nd AP and the 3rd AP is corresponding is the second port-mark and the 3rd port-mark.Gateway adds the second port-mark and deletes the first port-mark in former port-mark set (comprising the first port-mark and the 3rd port-mark), obtains the amended port-mark set comprising the second port-mark and the 3rd port-mark.Gateway can according to the change corresponding modify multicast list of incidence relation without the need to waiting for that multicast list is aging, and gateway fast shut-off when mobile terminal roaming causes AP not need receiving multicast data mails to the multicast traffic stream of this AP thus saved the bandwidth of multi-cast system.

Embodiment two

Based on same inventive concept, present embodiments provide a kind of wireless multicast cut-in method.As shown in Figure 1, gateway is connected with the direct of each AP in multiple AP (such as: an AP, the 2nd AP, the 3rd AP).Direct connection that is that above-mentioned direct connection refers to physics or logic.Such as, gateway can by the connection of each AP in optical fiber or netting twine and described multiple AP; Or gateway can be connected with each AP in described multiple AP by tunnel; Or be connected with some AP in described multiple AP by optical fiber or netting twine, and be connected with remaining AP by tunnel.

As shown in Figure 6, described wireless multicast cut-in method, comprising:

Step 21:AP receives user's list item that gateway is sent, user's list item comprises address and the mobile terminal address set of multicast packet, mobile terminal address set is the set of the address of at least one mobile terminal of the address of request multicast packet, at least one mobile terminal comprises the first mobile terminal, and this first mobile terminal is associated with this AP.

This first mobile terminal can be the mobile terminal roaming into this AP from other AP.

This first mobile terminal also can be the mobile terminal being newly associated with this AP.If this first mobile terminal needs multicast packet, then send IGMP request, the IGMP that gateway receives from this first mobile terminal asks, and ask to obtain user's list item according to this IGMP, this user's list item comprises address and the mobile terminal address set of the multicast packet of the first mobile terminal request, and this mobile terminal address set comprises the address of the first mobile terminal.Gateway sends this user's list item to AP.User's list item that AP sends according to gateway, instead of the multicast packet forwarding its request according to IGMP request to the first mobile terminal.

Step 22:AP receives the first multicast message, and the address of the multicast packet of the first multicast message is the address of the multicast packet in user's list item.

Step 23a:AP sends the first multicast message according to user's list item to the mobile terminal being associated with AP in mobile terminal address set.

Mobile terminal address set in user's list item that the address of the multicast packet of the first multicast message is corresponding comprises the address of the first mobile terminal, and the first mobile terminal is associated with this AP, therefore AP sends the first multicast message to the one group of mobile terminal comprising the first mobile terminal.

For example, described multicast packet can be: video multicast data or audio group multicast data or other any multicast packets, does not do concrete restriction for described multicast packet herein.

For example, described mobile terminal can be the terminal equipments such as smart mobile phone, panel computer, vehicle-mounted computer, does not do concrete restriction for described terminal herein.

For example, address in described mobile terminal address set, can be: MAC (mediaaccesscontrol, the medium access control) address of mobile terminal or IP (InternetProtocol, the Internet protocol) address of mobile terminal.

For example, as shown in Figure 1, be an AP for described AP, one AP receives user's list item that gateway is sent, this user's list item comprises address and the mobile terminal address set of multicast packet, described mobile terminal address set comprises the address of the address of mobile terminal A, the address of mobile terminal B and mobile terminal D, wherein, mobile terminal A and mobile terminal B is associated with an AP, mobile terminal D is associated with the 3rd AP, the address of the multicast packet that the address of described multicast packet is mobile terminal A, mobile terminal B and mobile terminal D asks simultaneously.Further, an AP receiving group message A, the multicast packet carried in multicast message A is the multicast packet that mobile terminal A, mobile terminal B and mobile terminal D ask.Further, one AP determines the address (that is: the address of mobile terminal A and the address of mobile terminal B) of the mobile terminal be associated with in an AP from described mobile terminal address set, and multicast message A is sent to mobile terminal A and mobile terminal B.

For example, as shown in Figure 2, be the 2nd AP for described AP, 2nd AP receives user's list item that gateway is sent, this user's list item comprises address and the mobile terminal address set of multicast packet, described mobile terminal address set comprises the address of mobile terminal A, the address of mobile terminal B, and the address of mobile terminal D, wherein, mobile terminal A is associated with the 2nd AP, mobile terminal B is associated with an AP, mobile terminal D is associated with the 3rd AP, the address of described multicast packet is mobile terminal A, the address of the multicast packet that mobile terminal B and mobile terminal D asks simultaneously.Further, the 2nd AP receives the multicast message B that gateway is sent, and the multicast packet carried in described multicast message B is the multicast packet that mobile terminal A, mobile terminal B and mobile terminal D ask.Further, the 2nd AP determines the address (that is: the address of mobile terminal A) of the mobile terminal be associated with in the 2nd AP from described mobile terminal address set, and multicast message B is sent to mobile terminal A.

In the present embodiment, when mobile terminal goes to associate from an AP and is associated with the 2nd AP, user's list item that 2nd AP can send based on gateway, the multicast message fast-forwarding sent by gateway, to mobile terminal, makes mobile terminal can receive multicast packet from the 2nd AP fast.

In the present embodiment, when described multicast packet is video multicast data, when mobile terminal goes to associate with an AP and is associated with the 2nd AP, mobile terminal can receive this video multicast data from the 2nd AP rapidly, thus obviate or mitigates the phenomenon occurring that video playback card pauses.

If the second mobile terminal is the mobile terminal roaming into this AP from other AP, and the second mobile terminal is being associated with other AP this multicast packet requested, then the address of this second mobile terminal has been added the mobile terminal address set of this multicast packet by gateway.Above-mentioned mobile terminal address set also comprises the address of the second mobile terminal, and the second mobile terminal described in this is not associated with this AP before the second mobile terminal roaming to this AP.Receive user's list item of the address comprising the second mobile terminal at this AP after, the second mobile terminal is associated with this AP.As shown in Figure 7, the method also comprises:

Step 23b:AP determines that the second mobile terminal is associated with AP.

Step 24b:AP receives the second multicast message, and the address of the multicast packet of the second multicast message is the address of the multicast packet in user's list item.

Step 25b:AP sends the second multicast message according to user's list item to the multiple mobile terminals being associated with AP in mobile terminal address set, and multiple mobile terminal comprises the first mobile terminal and the second mobile terminal.

For example, as shown in Figure 1, be an AP for described AP, if mobile terminal D goes to associate from the 3rd AP and is associated with an AP, now, described method also comprises:

One AP determines that mobile terminal D is associated with an AP;

One AP receiving group message A, and multicast message A is sent to mobile terminal A, mobile terminal B, mobile terminal D.

For example, as shown in Figure 2, be the 2nd AP for described AP, if mobile terminal D goes to associate from the 3rd AP and is associated with the 2nd AP, now, described method also comprises:

2nd AP determines that mobile terminal D is associated with the 2nd AP;

2nd AP receiving group message B, and multicast message B is sent to mobile terminal A, mobile terminal D.

Embodiment three

Based on same inventive concept, present embodiments provide a kind of gateway, as shown in Figure 8, gateway comprises:

First receiving element 31, asks for the Internet Group Management Protocol IGMP received from mobile terminal, and according to the address of the address of IGMP acquisition request mobile terminal and the multicast packet of mobile terminal request;

First obtains unit 32, and for obtaining user's list item, user's list item comprises address and the mobile terminal address set of multicast packet, and the address of mobile terminal belongs to mobile terminal address set;

First transmitting element 33, for user's list item being sent to an AP and the 2nd AP, wherein, an AP is the AP that mobile terminal is associated with, and the 2nd AP is different from an AP.

Optionally, in the present embodiment, gateway also comprises:

Second obtains unit, for obtaining multicast list, multicast list comprises address and the port-mark set of the multicast packet in user's list item, port-mark set is the set of at least one port-mark, the port that any one port-mark at least one port-mark identifies is the port that gateway is directly connected with an AP in AP set, AP set is the set of the AP associated with the mobile terminal of at least one address designation in mobile terminal address set, wherein, AP set comprises an AP and does not comprise the 2nd AP, port-mark set comprises the first port-mark, first port-mark is for identifying the first port of gateway, first port is the port that gateway is directly connected with an AP,

Second receiving element, for receiving the first multicast message, the address of the multicast packet of the first multicast message is the address of the multicast packet of mobile terminal request;

Second transmitting element, sends the first multicast message for the port identified by each port-mark in port-mark set according to multicast list to each AP in AP set;

First determining unit, for determining that mobile terminal goes associate and associate the 2nd AP from an AP;

Amendment unit, for revising port-mark set, wherein, gateway amendment port-mark set comprises gateway add the second port-mark in port-mark set, second port-mark is for identifying the second port of gateway, and the second port is the port that gateway is directly connected with the 2nd AP;

3rd receiving element, for receiving the second multicast message, the address of the multicast packet of the second multicast message is the address of the multicast packet of mobile terminal request;

3rd transmitting element, sends the second multicast message for the port identified by each port-mark in amended port-mark set according to multicast list to each AP in new AP set, and new AP set comprises the 2nd AP.

Optionally, in the present embodiment, gateway also comprises:

Second determining unit, for going association and after associating the 2nd AP, that determine the mobile terminal association that any one address in mobile terminal address set identifies is all other AP except an AP at gateway determination mobile terminal from an AP;

Amendment unit also for: delete the first port-mark in port-mark set.

Embodiment four

Based on same inventive concept, present embodiments provide a kind of AP, as shown in Figure 9, AP comprises:

First receiving element 41, for receiving user's list item that gateway is sent, user's list item comprises address and the mobile terminal address set of multicast packet, mobile terminal address set is the set of the address of at least one mobile terminal of the address of request multicast packet, at least one mobile terminal comprises the first mobile terminal, and the first mobile terminal is associated with AP;

Second receiving element 42, for receiving the first multicast message, the address of the multicast packet of the first multicast message is the address of the multicast packet in user's list item;

First transmitting element 43, for sending the first multicast message according to user's list item to the mobile terminal being associated with AP in mobile terminal address set.

Optionally, in the present embodiment, mobile terminal address set also comprises the address of the second mobile terminal, and the second mobile terminal is not associated with AP, and AP also comprises:

First determining unit, after sending the first multicast message, determines that the second mobile terminal is associated with AP;

3rd receiving element, for receiving the second multicast message, the address of the multicast packet of the second multicast message is the address of the multicast packet in user's list item;

Second transmitting element, for sending the second multicast message according to user's list item to the multiple mobile terminals being associated with AP in mobile terminal address set, multiple mobile terminal comprises the first mobile terminal and the second mobile terminal.

Embodiment five

Based on same inventive concept, present embodiments provide a kind of gateway, as shown in Figure 10, gateway comprises:

Port 51.Port 51 can by optical transceiver, and electric transceiver or its combination realize.Such as, optical transceiver can be that Small Form-Factor Pluggable is (English: smallform-factorpluggabletransceiver, abbreviation: SFP) transceiver is (English: transceiver), strengthen Small Form-Factor Pluggable (English: enhancedsmallform-factorpluggable, abbreviation: SFP+) transceiver or 10 gigabit Small Form-Factor Pluggables (English: 10Gigabitsmallform-factorpluggable, abbreviation: XFP) transceiver.Electricity transceiver can be that Ethernet is (English: Ethernet) network interface controller (English: networkinterfacecontroller, abbreviation: NIC).Port 51 also can refer to the tunnel using this physical port.

Memory 52, for program code stored.Memory 52 can comprise volatile memory, and (English: volatilememory), such as (English: random-accessmemory, abridges: RAM) random access memory; It is (English: non-volatilememory) that memory also can comprise nonvolatile memory, such as read-only memory is (English: read-onlymemory, abbreviation: ROM), flash memory is (English: flashmemory), hard disk is (English: harddiskdrive, abbreviation: HDD) or solid state hard disc (English: solid-statedrive, abbreviation: SSD); Memory can also comprise the combination of the memory of mentioned kind.

Processor 53, is connected with port 51 and memory 52, for from memory 52 program code read, to perform.Processor 53 can be central processing unit (English: centralprocessingunit, abbreviation: CPU), also can be the combination of CPU and hardware chip.Above-mentioned hardware chip can be one or more combination following: application-specific integrated circuit (ASIC) is (English: application-specificintegratedcircuit, abbreviation: ASIC), field programmable gate array is (English: field-programmablegatearray, abbreviation: FPGA), CPLD is (English: complexprogrammablelogicdevice, abbreviation: CPLD) and network processing unit (English: networkprocessor, abbreviation: NP).

Processor 53 is connected with port 51 by bus.Processor 53 is connected with memory 52 by bus.Bus is represented with thick line in Figure 10.

The Internet Group Management Protocol IGMP received from mobile terminal by port 51 is asked, and according to the address of the address of IGMP acquisition request mobile terminal and the multicast packet of mobile terminal request; Obtain user's list item, user's list item comprises address and the mobile terminal address set of multicast packet, and the address of mobile terminal belongs to mobile terminal address set; By port 51, user's list item is sent to an AP and the 2nd AP, wherein, an AP is the AP that mobile terminal is associated with, and the 2nd AP is different from an AP.

Optionally, in the present embodiment, processor 53 also for:

After acquisition user list item, obtain multicast list, multicast list comprises address and the port-mark set of the multicast packet in user's list item, port-mark set is the set of at least one port-mark, the port that any one port-mark at least one port-mark identifies is the port that gateway is directly connected with an AP in AP set, AP set is the set of the AP associated with the mobile terminal of at least one address designation in mobile terminal address set, wherein, AP set comprises an AP and does not comprise the 2nd AP, port-mark set comprises the first port-mark, first port-mark is for identifying the first port of gateway, first port is the port that gateway is directly connected with an AP, receive the first multicast message by port 51, the address of the multicast packet of the first multicast message is the address of the multicast packet of mobile terminal request, the first multicast message is sent to each AP in AP set according to the port that multicast list is identified by each port-mark in port-mark set, determine that mobile terminal goes association from an AP and associates the 2nd AP, the set of amendment port-mark, wherein, the set of gateway amendment port-mark comprises gateway and add the second port-mark in port-mark set, and the second port-mark is for identifying the second port of gateway, and the second port is the port that gateway is directly connected with the 2nd AP, receive the second multicast message by port 51, the address of the multicast packet of the second multicast message is the address of the multicast packet of mobile terminal request, send the second multicast message according to the port that multicast list is identified by each port-mark in amended port-mark set to each AP in new AP set, new AP set comprises the 2nd AP.

Optionally, in the present embodiment, processor 53 also for:

Determining that mobile terminal goes association and after associating the 2nd AP, that determine the mobile terminal association that any one address in mobile terminal address set identifies is all other AP except an AP from an AP; The set of amendment port-mark also comprises: delete the first port-mark in port-mark set.

Embodiment six

Based on same inventive concept, present embodiments provide a kind of access point AP, as shown in figure 11, AP comprises:

Cable port 61 and radio port 62.Cable port 61 can by optical transceiver, and electric transceiver or its combination realize.Such as, optical transceiver can be that Small Form-Factor Pluggable is (English: smallform-factorpluggabletransceiver, abbreviation: SFP) transceiver is (English: transceiver), strengthen Small Form-Factor Pluggable (English: enhancedsmallform-factorpluggable, abbreviation: SFP+) transceiver or 10 gigabit Small Form-Factor Pluggables (English: 10Gigabitsmallform-factorpluggable, abbreviation: XFP) transceiver.Electricity transceiver can be that Ethernet is (English: Ethernet) network interface controller (English: networkinterfacecontroller, abbreviation: NIC).Cable port 61 also can refer to the tunnel using this physical port.Radio port 62 can be radio network interface controller (English: wirelessnetworkinterfacecontroller, abbreviation: WNIC).

Memory 63, for program code stored.Memory 63 can comprise volatile memory, and (English: volatilememory), such as (English: random-accessmemory, abridges: RAM) random access memory; It is (English: non-volatilememory) that memory also can comprise nonvolatile memory, such as read-only memory is (English: read-onlymemory, abbreviation: ROM), flash memory is (English: flashmemory), hard disk is (English: harddiskdrive, abbreviation: HDD) or solid state hard disc (English: solid-statedrive, abbreviation: SSD); Memory can also comprise the combination of the memory of mentioned kind.

Processor 64 can be central processing unit (English: centralprocessingunit, abbreviation: CPU), also can be the combination of CPU and hardware chip.Above-mentioned hardware chip can be one or more combination following: application-specific integrated circuit (ASIC) is (English: application-specificintegratedcircuit, abbreviation: ASIC), field programmable gate array is (English: field-programmablegatearray, abbreviation: FPGA), CPLD is (English: complexprogrammablelogicdevice, abbreviation: CPLD) and network processing unit (English: networkprocessor, abbreviation: NP).Processor 64 is connected with cable port 61 by bus.Processor 64 is connected with radio port 62 by bus.Processor 64 is connected with memory 63 by bus.Bus is represented with thick line in Figure 11.Processor 64, is connected with cable port 61, radio port 62 and memory 63, for from memory 63 program code read, to perform:

User's list item that gateway sends is received by cable port 61, user's list item comprises address and the mobile terminal address set of multicast packet, mobile terminal address set is the set of the address of at least one mobile terminal of the address of request multicast packet, at least one mobile terminal comprises the first mobile terminal, and the first mobile terminal is associated with AP; Receive the first multicast message by cable port 61, the address of the multicast packet of the first multicast message is the address of the multicast packet in user's list item; The first multicast message is sent to the mobile terminal being associated with AP in mobile terminal address set by radio port 62 according to user's list item.

Optionally, in the present embodiment, mobile terminal address set also comprises the address of the second mobile terminal, and the second mobile terminal is not associated with AP, processor 64 also for:

After transmission first multicast message, determine that the second mobile terminal is associated with AP; Receive the second multicast message by cable port 61, the address of the multicast packet of the second multicast message is the address of the multicast packet in user's list item; Send second multicast message to the multiple mobile terminals being associated with AP in mobile terminal address set by radio port 62 according to user's list item, multiple mobile terminal comprises the first mobile terminal and the second mobile terminal.

Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.

Claims

1. a wireless multicast cut-in method, is characterized in that, described method comprises:

2. the method for claim 1, is characterized in that, after described gateway obtains user's list item, described method also comprises:

3. method as claimed in claim 2, is characterized in that, determines that described mobile terminal goes association and after associating described 2nd AP, described method also comprises from a described AP at described gateway:

4. a wireless multicast cut-in method, is characterized in that, described method comprises:

5. method as claimed in claim 4, it is characterized in that, described mobile terminal address set also comprises the address of the second mobile terminal, and described second mobile terminal is not associated with described AP, and described method also comprises:

6. a gateway, is characterized in that, described gateway comprises:

7. gateway as claimed in claim 6, it is characterized in that, described gateway also comprises:

8. gateway as claimed in claim 7, it is characterized in that, described gateway also comprises:

9. an access point AP, is characterized in that, described AP comprises:

10. AP as claimed in claim 9, it is characterized in that, described mobile terminal address set also comprises the address of the second mobile terminal, and described second mobile terminal is not associated with described AP, and described AP also comprises:

11. 1 kinds of gateways, is characterized in that, described gateway comprises:

Port;

Memory, for program code stored;

12. gateways as claimed in claim 11, is characterized in that, described processor also for:

13. gateways as claimed in claim 12, is characterized in that, described processor also for:

14. 1 kinds of access point AP, is characterized in that, described AP comprises:

Cable port and radio port;

Memory, for program code stored;

15. AP as claimed in claim 14, it is characterized in that, described mobile terminal address set also comprises the address of the second mobile terminal, and described second mobile terminal is not associated with described AP, described processor also for: