CN101640942A - Method for sending broadcast data and equipment thereof - Google Patents
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- CN101640942A CN101640942A CN200910092113A CN200910092113A CN101640942A CN 101640942 A CN101640942 A CN 101640942A CN 200910092113 A CN200910092113 A CN 200910092113A CN 200910092113 A CN200910092113 A CN 200910092113A CN 101640942 A CN101640942 A CN 101640942A
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Abstract
The invention discloses a method for sending broadcast data, comprising the following steps: an access point (AP) sends a Beacon frame carried with a designated service set identifier (SSID) and notice information, wherein, the notice information is used for noticing a service set support corresponding to the SSID to broadcast to a client side receiving the Beacon frame; the client side receivingthe Beacon frame comprises the client side which is connected to the AP and the client side which is not connected to the AP; and the AP sends a broadcast data frame corresponding to the designated SSID so that all the client sides receiving the Beacon frame process the data frame after receiving the broadcast data frame corresponding to the designated SSID sent by the AP. The invention further discloses customer premise equipment and the AP. In the technical scheme of the invention, the customer premise equipment which is not connected to the AP can also process the data frame after receivingthe broadcast data frame sent by the AP.
Description
Technical field
The present invention relates to wireless communication technology field, refer to a kind of broadcast data transmitting method, a kind of client and a kind of access point especially.
Background technology
Access point (AP, Access Point) provides the bridging functionality of wireless client (Station) to WLAN (wireless local area network), carries out wireless wired and wired wireless frame conversion of arriving of arriving between wireless client and WLAN (wireless local area network).
In basic network, all communications must be undertaken by AP.AP is responsible for sending beacon (Beacon) frame, the existence that is used for declaring certain network.Wherein, distinguish different networks with service set (SSID, Service Set sign), client only behind the SSID of having known certain network, could insert this network.
The Beacon frame is a kind of wireless management frame frame of broadcasting, its in one's power scope be Basic Service Set (BSS, Basic Service Set).AP regularly sends the Beacon frame, can allow the interior client of institute's collection scope know the existence of network, adds the necessary parameter of this network thereby adjust.
The frame format schematic diagram of Fig. 1 wireless management frame of the prior art.When type (Type) field in the control of the frame among Fig. 1 (Frame control) field is " 00 ", expression is a management frames, when subtype (Subtype) field in the Frame control field is " 1000 ", represent that this management frames is a Beacon frame.Then the MAC of a Beacon frame as follows:
Frame control (Frame control):
Version (Version): 0
Type (Type): 00/ management frames
Subtype (Subtype): 1000/Beacon frame
Frame control (Frame Control Flags): 00000000
Duration (Duration): 0
Destination address (Destination): FF:FF:FF:FF:FF:FF/Ethernet broadcasting
Source address (Source): 00:0F:E2:9A:D7:70
Basic service set identification (BSSID): 00:0F:E2:9A:D7:70
Sequence number (Seq Number): 2484
Segment numbers (Frag Number): 0
In 802.11 agreements, the frame of Beacon frame (Frame Body) field is used for carrying some information specific elements (IE, Information Element), and this is comprising manufacturer's self-defined information element (Vendor IE).Vendor IE is that the user can self-defining information element, and it is as shown in Figure 2 suitable.Fig. 2 is the form schematic diagram of Vendor IE of the prior art.
At present, in wireless network, the available data information broadcast mode is: the broadcast data that broadcast source sends, must broadcast in wireless network through AP, and the data of AP broadcasting only come into force to the client that is connected to this AP.There is following shortcoming in this broadcast mode:
For wireless client, only handle the Frame that own related AP sends, and the Frame of other AP or client will Direct Filtration fall when receiving.That is to say that from the angle of AP, the user that can receive broadcast data frame must be the user who has been associated with this AP, the user of dereferenced can't receive the broadcast data that AP sends out.Yet, in wireless network, some information is that the information publisher wants to utilize AP to be distributed to all users in the scope in one's power with broadcast mode, be that the information publisher wishes in this AP wireless signal coverage, and all wireless clients under the same channel (comprising the client that is associated with this AP and is not associated with this AP) can both receive.These information contents can be advertising messages such as company introduction, product introduction, information of discount, also can be informations such as weather forecast, hot news.But scheme of the prior art can't realize this purpose.
Summary of the invention
The invention provides a kind of broadcast data transmitting method, the feasible client device that is not connected to AP of this method also can be handled when receiving the broadcast data frame of AP transmission.
The invention provides a kind of client, this client also can be handled when receiving the broadcast data frame of AP transmission when not being connected to AP.
The present invention also provides a kind of AP, and the feasible client device that is not connected to AP of this AP also can be handled when receiving the broadcast data frame of AP transmission.
For achieving the above object, technical scheme of the present invention specifically is achieved in that
The invention discloses a kind of broadcast data transmitting method, this method comprises:
Access point AP sends and carries the beacon Beacon frame of specified services set identifier SSID and advertised information; Wherein, the services set support that is used to announce described SSID correspondence of described advertised information is broadcasted to the client that receives the Beacon frame; The client that receives the Beacon frame comprises client that is connected to described AP and the client that is not connected to described AP;
AP sends the broadcast data frame corresponding to described appointment SSID, makes all clients that receive described Beacon frame, receive that AP sends corresponding to the broadcast data frame of described appointment SSID the time, handle.
The invention discloses a kind of client, this client comprises: Beacon frame processing module and broadcast data frame processing module, wherein,
Beacon frame processing module, be used to receive the Beacon frame of specifying SSID and advertised information that carries from AP, the services set support of knowing described SSID correspondence according to described advertised information is broadcasted simultaneously to connecting client and disconnected client, and sends described appointment SSID and advertised information to the broadcast data frame processing module;
The broadcast data frame processing module is used for after the appointment SSID and advertised information that receive from Beacon frame processing module, receive that AP sends corresponding to the broadcast data frame of described appointment SSID the time, handle.
The invention also discloses a kind of access point AP, this AP comprises: Beacon frame sending module and broadcast data frame sending module, wherein,
Beacon frame sending module is used to send the Beacon frame that carries appointment SSID and advertised information; Wherein, the services set support from described SSID correspondence to the client that receives this Beacon frame that be used for announcing of described advertised information is broadcasted simultaneously to connecting client and disconnected client;
The broadcast data frame sending module is used to send the broadcast data frame corresponding to described appointment SSID;
Wherein, receive all clients of described Beacon frame, when the broadcast data frame that receives corresponding to described appointment SSID, handle.
As seen from the above technical solution, this AP of the present invention specifies the services set support of SSID correspondence to broadcast simultaneously connecting client and disconnected client by the client announcement of Beacon frame in coverage, and send for should with the broadcast data frame of specifying SSID, feasible all clients that receive the Beacon frame, when the broadcast data frame that receives corresponding to described appointment SSID, the technical scheme of handling, the feasible client that is not connected to AP, also can when receiving the broadcast data frame of AP transmission, handle.
Description of drawings
The frame format schematic diagram of Fig. 1 wireless management frame of the prior art;
Fig. 2 is the form schematic diagram of Vendor IE of the prior art;
Fig. 3 is the wireless network networking schematic diagram in the embodiment of the invention;
Fig. 4 is the flow chart of a kind of broadcast data transmitting method in the embodiment of the invention;
Fig. 5 is the form schematic diagram of the Vendor IE that defines in the embodiment of the invention
Fig. 6 is the composition structured flowchart of a kind of client of the embodiment of the invention.
Embodiment
Core concept of the present invention is: by expansion Beacon frame, and the client Station in AP wireless signal coverage (comprising client that is connected to this AP and the client that is not connected to this AP) announcement: specify the pairing services set support of SSID that the client in all coverages is broadcasted; Receive all clients of announcement like this, when connecting AP, also to received corresponding to shown in specify the broadcast data frame of SSID to handle.
For making purpose of the present invention, technical scheme and advantage clearer, below with reference to Fig. 3 and Fig. 4, the present invention is described in more detail.
Fig. 3 is the wireless network networking schematic diagram in the embodiment of the invention.As shown in Figure 3, in the wireless signal coverage of AP, promptly there is the client that has connected this AP, also has the client that does not connect this AP.
Fig. 4 is the flow chart of a kind of broadcast data transmitting method in the embodiment of the invention.As shown in Figure 4, this method comprises:
In this step, described advertised information is used for announcement: the services set support of described SSID correspondence is broadcasted simultaneously to connecting client and disconnected client.
In this step, when specifying the SSID service to enable, AP sends and carries the beacon Beacon frame of specifying SSID and advertised information.Here, can enable to specify the SSID service by on AP, carrying out static configuration.
In this step, AP fills in described appointment SSID in the intrinsic ssid field of Beacon frame, and defines a VendorIE who comprises described advertised information in the frame (Frame Body) of Beacon frame, sends this Beacon frame then.
In this step, AP sends the broadcast data frame corresponding to described appointment SSID, is AP broadcasts described SSID correspondence in BSS broadcast data frame.
In this step, handle for dropping packets, promptly receive the client of described Beacon frame, even do not connecting under the situation of AP, receive that AP sends corresponding to the broadcast data frame of described appointment SSID the time, also no longer abandon, but carry out normal process.As for the normal process of which kind of carrying out is prior art, and also the solution of the present invention is uncorrelated, therefore no longer describes in detail.
In step 401 shown in Figure 4, need expand Beacon, make it have announcement function, in one embodiment of the present of invention the Vendor IE in the Beacon frame is made as shown in Figure 5 definition.Fig. 5 is the form schematic diagram of the Vendor IE that defines in the embodiment of the invention.Referring to Fig. 5, preceding 3 fields define in 802.11 agreements, no longer describe in detail here; Here 1 byte that defines after each OUI field is the Capability field, and the definition of this Capability field can be as shown in table 1:
| Type (Type) | Implication |
| ??0x00 | Keep |
| ??0x01 | Support is to connecting and disconnected client while broadcast data frame |
| Other | Keep |
Table 1
As seen from Table 1, the 0x01 in the Capability field is advertised information.
The foregoing description may be summarized to be: access point AP sends and carries the beacon Beacon frame of specified services set identifier SSID and advertised information; Wherein, the services set support that is used to announce described SSID correspondence of described advertised information is broadcasted to the client that receives the Beacon frame; The client that receives the Beacon frame comprises client that is connected to described AP and the client that is not connected to described AP; AP sends the broadcast data frame corresponding to described appointment SSID, makes all clients that receive described Beacon frame, receive that AP sends corresponding to the broadcast data frame of described appointment SSID the time, handle.
Based on the foregoing description, provide a kind of client among the present invention and the composition structure of a kind of AP.
Fig. 6 is the composition structured flowchart of a kind of client of the embodiment of the invention.As shown in Figure 6, this client comprises: Beacon frame processing module 601 and broadcast data frame processing module 602, wherein,
Beacon frame processing module 601, be used to receive the Beacon frame of specifying SSID and advertised information that carries from AP, the services set support of knowing described SSID correspondence according to described advertised information is broadcasted simultaneously to connecting client and disconnected client, and sends described appointment SSID and advertised information to broadcast data frame processing module 602;
Broadcast data frame processing module 602 is used for after the appointment SSID and advertised information that receive from Beacon frame processing module 601, receive that AP sends corresponding to the broadcast data frame of described appointment SSID the time, handle.
In Fig. 6, Beacon frame processing module 601 is used to receive the Beacon frame of specifying SSID and advertised information that carries from AP; Wherein, carry described appointment SSID in the ssid field of described Beacon frame, carry the Vendor IE that comprises described advertised information in the frame of described Beacon frame.
A kind of AP in the embodiment of the invention comprises: Beacon frame sending module and broadcast data frame sending module, wherein,
Beacon frame sending module is used to send the Beacon frame that carries appointment SSID and advertised information; Wherein, the services set support from described SSID correspondence to the client that receives this Beacon frame that be used for announcing of described advertised information is broadcasted simultaneously to connecting client and disconnected client;
The broadcast data frame sending module is used to send the broadcast data frame corresponding to described appointment SSID;
Wherein, receive all clients of described Beacon frame, when the broadcast data frame that receives corresponding to described appointment SSID, handle.
Beacon frame sending module among the described AP in the embodiment of the invention, be used for filling in described appointment SSID in the ssid field of Beacon frame, and in the frame of Beacon frame, define a Vendor IE who comprises described advertised information, send this Beacon frame then.
In sum, this AP of the present invention specifies the services set support of SSID correspondence to broadcast simultaneously connecting client and disconnected client by the client announcement of Beacon frame in coverage, and send corresponding to the broadcast data frame of specifying SSID, feasible all clients that receive the Beacon frame, when the broadcast data frame that receives corresponding to described appointment SSID, handle.This technical scheme of the present invention, the feasible client that is not connected to AP also can be handled when receiving the broadcast data frame of AP transmission.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention, all any modifications of being made within the spirit and principles in the present invention, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1, a kind of broadcast data transmitting method is characterized in that, this method comprises:
Access point AP sends and carries the beacon Beacon frame of specified services set identifier SSID and advertised information; Wherein, the services set support that is used to announce described SSID correspondence of described advertised information is broadcasted to the client that receives the Beacon frame; The client that receives the Beacon frame comprises client that is connected to described AP and the client that is not connected to described AP;
AP sends the broadcast data frame corresponding to described appointment SSID, makes all clients that receive described Beacon frame, receive that AP sends corresponding to the broadcast data frame of described appointment SSID the time, handle.
2, the method for claim 1 is characterized in that, AP sends to carry and specifies the Beacon frame of SSID and advertised information to comprise:
AP fills in described appointment SSID in the ssid field of Beacon frame, and defines the self-defined information element Vendor IE of manufacturer that comprises described advertised information in the frame of Beacon frame, sends this Beacon frame then.
3, a kind of client is characterized in that, this client comprises: Beacon frame processing module and broadcast data frame processing module, wherein,
Beacon frame processing module, be used to receive the Beacon frame of specifying SSID and advertised information that carries from AP, the services set support of knowing described SSID correspondence according to described advertised information is broadcasted simultaneously to connecting client and disconnected client, and sends described appointment SSID and advertised information to the broadcast data frame processing module;
The broadcast data frame processing module is used for after the appointment SSID and advertised information that receive from Beacon frame processing module, receive that AP sends corresponding to the broadcast data frame of described appointment SSID the time, handle.
4, client as claimed in claim 3 is characterized in that,
Beacon frame processing module is used to receive the Beacon frame of specifying SSID and advertised information that carries from AP; Wherein, carry described appointment SSID in the ssid field of described Beacon frame, carry the Vendor IE that comprises described advertised information in the frame of described Beacon frame.
5, a kind of access point AP is characterized in that, this AP comprises: Beacon frame sending module and broadcast data frame sending module, wherein,
Beacon frame sending module is used to send the Beacon frame that carries appointment SSID and advertised information; Wherein, the services set support from described SSID correspondence to the client that receives this Beacon frame that be used for announcing of described advertised information is broadcasted simultaneously to connecting client and disconnected client;
The broadcast data frame sending module is used to send the broadcast data frame corresponding to described appointment SSID;
Wherein, receive all clients of described Beacon frame, when the broadcast data frame that receives corresponding to described appointment SSID, handle.
6, AP as claimed in claim 5 is characterized in that,
Described Beacon frame sending module is used for filling in described appointment SSID in the ssid field of Beacon frame, and defines a Vendor IE who comprises described advertised information in the frame of Beacon frame, sends this Beacon frame then.
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Address after: 310052 Binjiang District Changhe Road, Zhejiang, China, No. 466, No. Patentee after: Xinhua three Technology Co., Ltd. Address before: 310053 Hangzhou hi tech Industrial Development Zone, Zhejiang province science and Technology Industrial Park, No. 310 and No. six road, HUAWEI, Hangzhou production base Patentee before: Huasan Communication Technology Co., Ltd. |