CN103313198A - Message reception and transmission method and device, and broadcast system - Google Patents
Message reception and transmission method and device, and broadcast system Download PDFInfo
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- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
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Abstract
The invention provides a message reception method, a message transmission method, a message reception device, a message transmission device and a broadcast system. The message reception method comprises the steps of: receiving a first message, wherein the first message comprises classification information of a second message, and receiving the second message when the classification information of the second message meets a reception requirement. Therefore, before the message is received, the message is judged whether the message is to be received according to the classification of the message; the message is received only when the message meets the reception requirement; and the processing pressure of the message reception is reduced.
Description
Technical field
The present invention relates to wireless communication field, be specifically related to a kind of method of receipt message, a kind of device of the method for message, a kind of receipt message, a kind of device and a kind of broadcast system that sends message of sending.
Background technology
IEEE 802.11 technology are that physical layer (PHY layer) has been formulated a general medium access key-course (MAC layer) to realize the framework of standard wireless local area networks (WLAN), wherein the main task of MAC layer is to set up addressing and channel access controlling mechanism for a plurality of websites (STA) in the consolidated network, so that the communication between a plurality of website becomes possibility.
As shown in Figure 1, the element of WLAN is Basic Service Set (BSS), and this BSS forms BSS1 as shown in Figure 1, BSS2 and BSS3 by being within a certain particular coverage and having certain related website.Have the central location of being in charge of BSS in the BSS network, be called access point (AP), other site STA in the BSS network all is associated with AP, BSS2 as shown in Figure 1 and BSS3.A plurality of BSS Netcom crosses DS and interconnects and can form extended service set ESS.In the situation that disappearance AP in the BSS network, each site STA among this BSS also can ad-hoc network and mutually direct communication, and this network is called independent BSS or IBSS network, BSS1 as shown in Figure 1.
In mac frame 802.11 technology, between the website in a kind of data protocol unit of MAC layer communication, its form as shown in Figure 2, mac frame generally comprises three parts: the frame (Frame Body) of mac frame head (MAC Header), variable-length and Frame Check Sequence (FCS:Frame Check Sequence).Wherein mac frame head field comprises frame control (Frame Control) field, duration/ID (Duration/ID) field, address 1 (Address 1) field, address 2 (Address 2) field, address 3 (Address 3) field, sequence control (Sequence Control) field, address 4 (Address 4) field, QoS control (QoS Control) field and HT control (HT Control) field, the base attribute of indication mac frame and relative address information etc.; The mac frame body then comprises specific to the information of frame type or subtype, the particular content of indication mac frame, its variable-length; Frame Check Sequence comprises 32 bit cyclic redundancy codes (Cyclic Redundancy Code, CRC), and described CRC is calculated by all fields of mac frame head and frame, is used for the integrality of verification mac frame; After receiving station carries out verification to Frame Check Sequence, just can know the information that mac frame head and frame are included.
When the transmission website in the WLAN (wireless local area network) sends broadcast, this described broadcast is the mac frame form at the MAC layer, receiver address in its mac frame head (address 1 field) is set to broadcast address, carries particular content or the cell of described broadcast in the frame; Receiving station receives mac frame at channel, after Frame Check Sequence (FCS) is carried out verification, confirms that by broadcast address described mac frame is broadcast, obtains the content of described broadcast by resolving follow-up mac frame body again.
In the prior art, receiving station all will receive all broadcasts that occur on the channel, but be not all broadcasts all be that receiving station is needed, especially in the application scenarios of the Social WiFI that broadcast is various, for receiving station, receive and resolve unwanted broadcast, to cause meaningless energy expense, not only be unfavorable for energy-conservationly, and increased the work load of receiving station, reduce receiving efficiency.
Summary of the invention
For the problem that receiving station in the existing broadcast transport process need to receive and resolve all broadcasts that occur on the channel, the invention provides a kind of can be in advance according to the classification of message with the device that determines whether method, the method that sends message and the receipt message of the receipt message of receipt message, device and the broadcast system that sends message.
The invention provides a kind of method of receipt message, the method comprises:
Receive the first message, described the first message comprises the classification information of the second message;
When the classification information of described the second message satisfies acceptable conditions, receive the second message.
The present invention also provides a kind of method that sends message, and the method comprises:
Send the first message, described the first message comprises the classification information of the second message;
Send the second message.
The present invention also provides a kind of device of receipt message, and this device comprises:
The first receiving element is used for receiving the first message, and described the first message comprises the classification information of the second message;
Judging unit is used for judging whether the classification information of described the second message satisfies acceptable conditions;
The second receiving element is used for receiving the second message when the classification information of described the second message of described judgment unit judges satisfies acceptable conditions.
The present invention also provides a kind of device that sends message, and this device comprises:
Transmitting element is used for:
The first transmitting element is used for sending the first message, and described the first message comprises the classification information of the second message;
The second transmitting element is used for sending the second message.
The present invention also provides a kind of broadcast system, and this system comprises the device of described receipt message and the device of described transmission message.
According to the device of the method for receipt message provided by the invention, the method that sends message, receipt message, device and the broadcast system of transmission message, before sending the second message, the first message can be provided in advance, the classification of the second message that in advance indication is transmitted, receiving station can be first before receiving the second message determines whether to receive the second message according to the classification of the second message, only when satisfying condition of acceptance, the second message just receives, for the process of receipt message provides a kind of screening foundation, the processing pressure when having alleviated receipt message.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.Wherein:
Fig. 1 is the schematic diagram of structure that has comprised the WLAN of BSS and STA in the prior art;
Fig. 2 is according to the schematic diagram of the mac frame structure of using in 802.11 technology in the prior art;
Fig. 3 is the flow chart according to a kind of execution mode of the method for receipt message provided by the invention;
Fig. 4 is the schematic diagram according to the frame structure of a kind of the first message provided by the invention;
Fig. 5 is the schematic diagram according to the communication process of the message transfer of a kind of execution mode provided by the invention;
Fig. 6 is the schematic diagram according to the frame structure of the first message of a kind of execution mode provided by the invention;
Fig. 7 is the schematic diagram according to the communication sequential of the message transfer of a kind of execution mode provided by the invention;
Fig. 8 is the encapsulating structure schematic diagram according to the A-MPDU of a kind of execution mode provided by the invention;
Fig. 9 is the structural representation according to the broadcast frame of a kind of execution mode provided by the invention;
Figure 10 is the flow chart according to a kind of execution mode of transmission message provided by the invention;
Figure 11 is the structural representation according to a kind of execution mode of the device of receipt message provided by the invention;
Figure 12 is the structural representation according to a kind of execution mode of the device of transmission message provided by the invention.
Embodiment
By reference to the accompanying drawings embodiments of the present invention are described in detail below by instantiation.
The invention provides a kind of method of receipt message, as shown in Figure 3, the method can comprise: step S101, receive the first message, and described the first message comprises the classification information of the second message; Step S102 when the classification information of described the second message satisfies acceptable conditions, receives the second message.Thus can be before receiving the second message, know in advance the classification of second message that will receive, further selectively receive according to second message of described classification to follow-up transmission again, satisfy acceptable conditions if wherein judge the second message, then can receive this second message, otherwise, do not receive this second message.
Wherein said the first message comprises that the classification information of the second message can comprise the classification field of indicating the second News Category.Described the first message can be a kind of new control frame, for example is called the control frame of broadcasting announcement frame, or the mac frame of other form, for example beacon frame.The frame structure of described broadcasting announcement frame can adopt structure as shown in Figure 3.Described the second message can be the message that the message transmitting apparatus is prepared transmission, and the form of this message can be but be not limited to be management frames or Frame.The content of the second message can include but not limited to the information such as neighboring access point information (Neighbor Report element) or neighbours' information on services.The classification information of the second message can draw according to the content of second message that will transmit, and is indicated by the first message.The first message and the second message can be sent by devices such as broadcast station, transmission website, base station, and can be received by devices such as portable terminal, receiving station, user terminal.Described acceptable conditions can be predefined, and is corresponding with the optional classification of the second message, for example stipulated that the message of which classification can receive.Described classification can be classification corresponding to various message, for example with print relevant message belong to print classification, with show that relevant message belongs to Display Category, the message relevant with fax belongs to the classification etc. of faxing.
Preferably, described the first message and described the second message can all be broadcast or all be multicast message, wherein said the first message and described the second message can be broadcast simultaneously, also can be for being multicast message simultaneously, alternatively, described the first message can be multicast message for described the second message of broadcast, and perhaps described the first message is multicast message and described the second message is broadcast.
According to an execution mode, step S102 can comprise: the classification information of the second message that comprises when the first message belongs to this locality when accepting classification information, receives the second message.It can be predefined that classification information is accepted in wherein said this locality, comprise various need to be in the classification of the message of local reception.When the classification of the classification information of the second message indication was identical or corresponding with local certain classification of accepting to comprise in the classification information, the classification information that can determine the second message belonged to this locality and accepts classification information, can receive the second message at this moment.For instance, when the classification information of the second message belongs to Display Category, comprise Display Category, printing classification, fax classification if the classification of News Category information indicating is accepted in this locality in the receiving station, then can receive this second message.
According to an execution mode, described the first message is to receive in the situation that the transmission duration of described the second message or frame length reach predetermined threshold, wherein said predetermined threshold can preset by sending website, thereby can surpass in the situation of certain-length at transmission duration or the frame length of the second message, in the first message, announce in advance the classification of the second message.
According to an execution mode, step S102 can comprise: when the classification information of described the second message satisfies acceptable conditions, receive afterwards the second message through the scheduled time (or being called scheduled duration) after receiving the first message.The described scheduled time can be predefined, for example can be a short frame pitch (Short Inter-Frame Space, SIFS) duration.Describe below by an instantiation.
For instance, at first, can be received by the receiving station among the WLAN and send the first message that website sends, wherein said the first message comprises the advertised information of indicating the second News Category.Concrete, described the first message can be a kind of new control frame---broadcasting announcement frame, or the mac frame of other form, for example beacon frame.Described the first message comprises the classification field of indicating the second News Category; This external broadcasting announcement frame for transmitting the first message, can also comprise other fields, for example adopt frame format shown in Figure 4, can also comprise: the type bit position indication mac frame in the frame control field is control frame [01], subtype bit indication mac frame is in 0000～0011 for broadcasting announcement frame, concrete value; The indication of duration field sends duration, namely sends the required duration of the second message; Receiver address is the MAC Address of receiving station, can be a kind of of multicast address or broadcast address; Sending the address is the MAC Address of described transmission website; Classification field is indicated the classification of follow-up the second message, and receiving station optionally receives the second follow-up message according to described classification information.Receiving station receives the first message, obtaining classification field indicates after the classification information of the second message, when described classification information does not satisfy the acceptable conditions of receiving station, do not receive apart from first end of message and constantly send the second message that website sends after the SIFS duration, this moment, receiving station can enter sleep pattern, and its sleep duration is the transmission duration that comprises in the first message and the summation of SIFS duration; No person receives apart from first end of message and constantly sends the second message that website sends after the SIFS, obtains the content of the second message.The communication process that sends between website and the receiving station can be as shown in Figure 5.
When will receive the second message in order to learn in advance, preferably, described the first message at least also comprises: the transmission time information of the second message.
Preferably, described the first message can comprise the delivery time of the second message at least, and/or the transmission duration of the second message, and/or the transmission cycle of the second message, it for example is the delivery time of the second message, the transmission duration of the second message, with in transmission cycle of the second message any one, the perhaps combination of the one or both in the transmission cycle of the transmission duration of the delivery time of the second message and the second message and the second message, preferably, the transmission time information of described the second message comprises at least: the delivery time information of the second message, the perhaps combination of the one or both in the transmission cycle information of the transmission duration information of the delivery time information of the second message and the second message and the second message.。Thereby receiving station can be predicted delivery time, transmission duration, the transmission cycle of the second message, in order to receive the second message in the corresponding time.
Alternatively, step S101 can comprise: periodically receive described the first message.Wherein said the first message can periodically be sent, and is for example periodically sending in the beacon frame.
According to an execution mode, step S102 can comprise: the transmission time information according to the second message receives the second message.
According to an execution mode, described method can also comprise: comprise at least at the transmission time information of described the second message in the situation of transmission duration information of the delivery time information of the second message and the second message, when described the second News Category information did not satisfy acceptable conditions, receiving station can enter sleep pattern according to the transmission time information of the second broadcast message.Like this when receiving station judges that the second message of broadcasting does not belong to acceptable classification, this receiving station just can begin to enter sleep pattern by corresponding delivery time at the transmission time information of described the second message, and do not receive the second message, avoid the waste of electric weight, wherein the duration of sleep pattern can be the transmission duration of the second message.Describe below by an instantiation.
For instance, at first, receiving station receives beacon message, and this beacon message can comprise the first message, or corresponding to the first message; Concrete, described beacon message can be the frame of beacon frame or other form, such as probe response frame etc., carries the announcement cell in the beacon message, this cell format comprises component identification field, length of element field and advertised information field as shown in Figure 6 in the described announcement cell.Described announcement subdomain comprises classification information, delivery time information, the transmission duration information of at least one the second message and sends cycle information.Described transmission cycle information is indicated the transmission cycle of the second message.Described component identification field identification element is the announcement element; The remainder bytes length of length of element field indicator element, its value is 8*N, wherein the number of the second included message in the N value indication advertised information field.The advertised information field comprises classification field, delivery time field, sends the duration field and sends period field, wherein classification field is indicated the classification information of the second message, the delivery time field can be indicated the time that sends first the second message that is sent with respect to beacon message, for example indication will send the second message by 1ms after beacon message is sent, perhaps indication sends the concrete time of the second message first, send the indication of duration field and send the required duration of the second message, send the cycle that the period field indication sends the second message.
When the classification information of the second message did not satisfy acceptable conditions, then the delivery time in corresponding the second message did not receive the second message, otherwise received described the second message.The delivery time of described the second message can obtain in the following way: (1), obtain according to the delivery time information of the second message of corresponding advertised information field indication; (2), according to the delivery time information of the second message of corresponding advertised information field indication with send cycle information and calculate gained.Receiving station receives beacon message, obtain classification information and the transmission time information of the second message, when described classification information does not satisfy the acceptable conditions of receiving station, delivery time in the second message does not receive described the second message, this moment, receiving station can enter sleep pattern at the delivery time of included corresponding the second broadcast message of beacon message, and its sleep duration is the transmission duration of included corresponding the second broadcast message of beacon message; No person receives described the second message, obtains the broadcast message of the second message.The communication sequential that sends between website and the receiving station can be as shown in Figure 7.
According to an execution mode, described method can comprise: the aggregate packet that receives the first message and the second message.Described method also comprises: do not satisfy acceptable conditions if judge the classification information of follow-up the second message that described the first message comprises, then can abandon the aggregate packet of the first message and the second message, do not resolve the second follow-up in aggregate packet message.Describe below by an instantiation.
For instance, comprise the broadcasting announcement frame of the first message and comprise that the broadcast frame of the second message can be polymerized to polymerization Medium Access Control (MAC) Protocol Data Unit (Aggregate MAC Protocol Data Unit, A-MPDU) bag, so that receiving station can according to the classification information of the second included message of described broadcasting announcement frame, determine whether to abandon described A-MPDU bag.At first, receiving station receives the A-MPDU bag, and described A-MPDU comprises the first message and the second message; Concrete, described A-MPDU bag is the aggregate packet of broadcasting announcement frame and broadcast frame, the encapsulating structure of A-MPDU as shown in Figure 8, wherein said broadcasting announcement frame comprises the classification field of indicating the second News Category information, type bit position indication mac frame in the frame control field is control frame [01], subtype bit indication mac frame is in 0000～0011 for broadcasting announcement frame, concrete value; The transmission duration of the second follow-up message in the duration field indication aggregate packet; Receiver address is the MAC Address of receiving station, can be a kind of of multicast address or broadcast address; Sending the address is the MAC Address of described transmission website; The classification of the second follow-up message in the classification information indication aggregate packet, receiving station optionally receives the second follow-up message according to described classification information; Broadcast frame can be but be not limited to be management frames or Frame, and it comprises the particular content of the second message.
When described the second message does not satisfy acceptable conditions, then abandon described A-MPDU bag, otherwise continue to receive described A-MPDU bag; Receiving station receives the aggregate packet that comprises broadcasting announcement frame and broadcast frame, at first obtain the second News Category information that classification field comprises in the broadcasting announcement frame, do not satisfy the acceptable conditions of receiving station when described classification information, namely abandon described A-MPDU bag, do not resolve the second follow-up message, this moment, receiving station can enter sleep pattern, and its sleep duration is the transmission duration of follow-up the second message in the aggregate packet that comprises in the broadcasting announcement frame; No person continues to receive described aggregate packet, obtains the content of described the second message.
According to an execution mode, mistake appears in message transmitting procedure, described the second message or can also comprise corresponding to the broadcast frame of the second message: frame head verification sequence field, described frame head verification sequence field is used for the frame head of described the second message is carried out verification, described method can also comprise: after receiving described the second message, carry out verification according to frame head verification sequence field, when check results when being correct, judge that according to the classification information of the second indicated message of the classification field in described the second message frame head whether the second corresponding message satisfies acceptable conditions, determines whether to abandon the second message that is receiving.Below by an instantiation this execution mode is described.
For instance, at first, receiving station receipt message, the mac frame head of described message comprise classification field and frame head verification sequence FHCS field, and broadcast frame can adopt frame format for example shown in Figure 9.After the receiving station verification FHCS field, obtain the mac frame head field information of broadcast frame, when classification field indicates the classification information of described message not satisfy acceptable conditions in according to the mac frame head, then abandon described message; Otherwise continue to receive described message.
The present invention also provides a kind of method that sends message, and as shown in figure 10, the method can comprise: step S201, send the first message, and described the first message comprises the classification information of the second message; Step S202 sends the second message.So that receiving station can be known the classification of second message that will receive in advance before receiving the second message, further according to described classification the second message is selectively received again thus.
Wherein said the first message comprises that the classification information of the second message can comprise the classification field of indicating the second News Category.Described the first message can be a kind of new control frame, for example is called the control frame of broadcasting announcement frame, or the mac frame of other form, for example beacon frame.The frame structure of described broadcasting announcement frame can adopt structure as shown in Figure 3.Described the second message can be the message that the dispatching station point of transmission the first message will send, and the form of this message can be but be not limited to be management frames or Frame.The content of the second message can include but not limited to the information such as neighboring access point information or neighbours' information on services.The classification information of the second message can draw according to the content of second message that will send, and is indicated by the first message.The first message and the second message can be sent by devices such as broadcast station, transmission website, base station, and can be received by devices such as portable terminal, receiving station, user terminal.Described acceptable conditions can be predefined, and is corresponding with the optional classification of the second message, for example stipulated that the message of which classification can receive.Described classification can be classification corresponding to various message, for example with print relevant message belong to print classification, with show that relevant message belongs to Display Category, the message relevant with fax belongs to the classification etc. of faxing.
Preferably, described the first message and described the second message can all be broadcast or all be multicast message, wherein said the first message and described the second message can be broadcast simultaneously, also can be for being multicast message simultaneously, alternatively, described the first message can be multicast message for described the second message of broadcast, and perhaps described the first message is multicast message and described the second message is broadcast.
Alternatively, the first message can be to send in the situation that the transmission duration of the second message or frame length reach predetermined threshold, wherein said predetermined threshold can preset by sending website, thereby can surpass in the situation of certain-length at transmission duration or the frame length of the second message, in the first message, announce in advance the classification of the second message.
Alternatively, step S202 can comprise: through sending the second message after the scheduled time, described the second message can comprise the particular content that will broadcast after sending the first message.The described scheduled time can be predefined, for example can be a short frame pitch (SIFS) duration.Describe below by an instantiation.
For instance, at first, broadcast station sends the first message, and described the first message comprises advertised information.Broadcast station sent the first message or when the transmission duration of described the second message or frame length reach predetermined threshold, sent the first message before sending the second message; Wherein said the first message comprises the advertised information of indicating the second News Category.Wherein said the first message adopts a kind of new control frame---the mac frame of broadcasting announcement frame or other form, beacon frame for example, the structure of described broadcasting announcement frame can adopt frame structure as shown in Figure 4, and described the first message comprises the classification field of indicating the second News Category.Wherein the indication of the type bit position in frame control field mac frame is control frame [01], and subtype bit indication mac frame is in 0000～0011 for broadcasting announcement frame, concrete value; The indication of duration field sends duration, and namely the second message sends required duration; Receiver address is the MAC Address of receiving station, can be a kind of of multicast address or broadcast address; Sending the address is the MAC Address of described broadcast station; Classification field is indicated the classification of follow-up the second message, and receiving station optionally receives the second follow-up message according to described classification information.Receiving station receives the first message, obtaining classification field indicates after the classification information of the second message, when described classification information does not satisfy the acceptable conditions of receiving station, do not receive apart from first end of message and constantly send the second message that website sends after the SIFS duration, this moment, receiving station can enter sleep pattern, and its sleep duration is the transmission duration that comprises in the first message and the summation of SIFS duration; No person receives apart from first end of message and constantly sends the second message that website sends after the SIFS, obtains the content of the second message.The communication process that sends between website and the receiving station can be as shown in Figure 5.
When will receive the second message in order to inform in advance, preferably, described the first message at least also comprises: the transmission time information of the second message.
Preferably, described the first message can comprise the delivery time of the second message at least, and/or the transmission duration of the second message, and/or the transmission cycle of the second message, it for example is the delivery time of the second message, the transmission duration of the second message, with in transmission cycle of the second message any one, the perhaps combination of the one or both in the transmission cycle of the transmission duration of the delivery time of the second message and the second message and the second message, preferably, the transmission time information of described the second message comprises at least: the delivery time information of the second message, the perhaps combination of the one or both in the transmission cycle information of the transmission duration information of the delivery time information of the second message and the second message and the second message.。Thereby, can inform in advance receiving station the second message delivery time, send duration, transmission cycle, in order to receive the second message in the corresponding time.
Alternatively, step S201 can comprise: periodically send described the first message.Wherein said the first message can periodically be sent, and is for example periodically sending in the beacon frame.
Alternatively, step S202 can comprise: the delivery time information of the second message that comprises according to the first message or delivery time information and send cycle information and send the second message.Describe below by an instantiation.
For instance, at first, send website (or broadcast station) and send beacon message, this beacon message can comprise the first message, or corresponding to the first message; Concrete, described beacon message can be the frame of beacon frame or other form, such as probe response frame etc., carries the announcement cell in the beacon message, this cell format comprises component identification field, length of element field and advertised information field as shown in Figure 6 in the described announcement cell.Described classification field comprises classification information, delivery time information, the transmission duration information of at least one the second message and sends cycle information.Described transmission cycle information is indicated the transmission cycle of the second message.Described component identification field identification element is the announcement element; The remainder bytes length of length of element field indicator element, its value is 8*N, wherein the number of the second included message in the N value indication advertised information field.The advertised information field comprises classification field, delivery time field, sends the duration field and sends period field, wherein classification field is indicated the classification information of the second message, the time that the delivery time field indicates the second message to begin to send, send the indication of duration field and send the required duration of the second message.Thereby so that receiving station can be known the time of the second message appearance of particular category after receiving beacon message, realize the second message is selectively received.
Then, send the second message; The moment of the delivery time information indication that comprises in beacon message sends the second message, and described the second message comprises the particular content of broadcasting.Concrete, the content of the second message can be the cells such as neighboring access point report cell or neighbours' service report cell.The communication sequential that sends between website and the receiving station can be as shown in Figure 7.
According to an execution mode, described method can comprise: the aggregate packet that sends the first message and the second message.
For instance, comprise the broadcasting announcement frame of the first message and comprise that the broadcast frame of the second message can be polymerized to polymerization Medium Access Control (MAC) Protocol Data Unit (Aggregate MAC Protocol Data Unit, A-MPDU) bag, so that receiving station can according to the classification information of the second included message of described broadcasting announcement frame, determine whether to abandon described A-MPDU bag.Send website and send the A-MPDU bag, described A-MPDU comprises the first message and the second message; Concrete, described A-MPDU bag is the aggregate packet of broadcasting announcement frame and broadcast frame, the encapsulating structure of A-MPDU as shown in Figure 8, wherein said broadcasting announcement frame comprises the classification field of indicating the second News Category information, type bit position indication mac frame in the frame control field is control frame [01], subtype bit indication mac frame is in 0000～0011 for broadcasting announcement frame, concrete value; The transmission duration of the second follow-up message in the duration field indication aggregate packet; Receiver address is the MAC Address of receiving station, can be a kind of of multicast address or broadcast address; Sending the address is the MAC Address of described broadcast station; The classification of the second follow-up message in the classification information indication aggregate packet, receiving station optionally receives the second follow-up message according to described classification information; Broadcast frame can be but be not limited to be management frames or Frame, and it comprises the particular content of the second message.
According to an execution mode, mistake appears in message transmitting procedure, described the second message or can also comprise corresponding to the broadcast frame of the second message: frame head verification sequence field, described frame head verification sequence field are used for the frame head of described the second message is carried out verification.Owing in the second message frame head, having comprised classification field and frame head verification sequence field, so that receiving station can carry out verification according to frame head verification sequence field, when check results when being correct, judge that according to the classification information of the second indicated message of the classification field in described the second message frame head whether the second corresponding message satisfies acceptable conditions, determines whether to abandon the second message that is receiving.Below by an instantiation this execution mode is described.
For instance, at first send website and send message, the mac frame head of described message comprises classification field and frame head verification sequence FHCS field; Concrete, described the second message is broadcast frame, and it can be but be not limited to be management frames or Frame, and its mac frame body structure is as shown in Figure 9.
The present invention also provides a kind of device of receipt message, and as shown in figure 11, this device can comprise: the first receiving element 110, be used for receiving the first message, and described the first message comprises the classification information of the second message; Judging unit 120 is used for judging whether the classification information of described the second message satisfies acceptable conditions; The second receiving element 130 is used for receiving the second message when described judging unit 120 judges that the classification information of described the second message satisfies acceptable conditions.Receiving system can be before receiving the second message thus, know first the classification of second message that will receive, further selectively receive according to second message of described classification to follow-up transmission again, when the second message satisfies acceptable conditions, then can receive this second message, otherwise, do not receive this second message.
Preferably, described the first message and described the second message can all be broadcast or all be multicast message.
Wherein said judging unit 120 is used for judging whether the classification information of described the second message belongs to the local reception classification information; And described the second receiving element 130 is used for receiving the second message when described judging unit 120 judges that the classification information of the second message that the first message comprises belongs to this locality and accepts classification information.It can be predefined that classification information is accepted in wherein said this locality, comprise various need to be in the classification of the message of local reception.When the classification of the classification information of the second message indication was identical or corresponding with local certain classification of accepting to comprise in the classification information, receiving system can determine that the classification information of the second message belongs to this locality and accepts classification information, can receive the second message at this moment.
According to an execution mode, described the first message is to be received by the first receiving element 110 in the situation that the transmission duration of described the second message or frame length reach predetermined threshold, wherein said predetermined threshold can preset by sending website, thereby can surpass in the situation of certain-length at transmission duration or the frame length of the second message, in the first message, announce in advance the classification of the second message.
According to an execution mode, when described judging unit 120 judged that the classification information of described the second message satisfies acceptable conditions, described the second receiving element 130 received the second message after through the scheduled time after described the first receiving element 110 receives the first message.The described scheduled time can be predefined, for example can be a short frame pitch duration.
When will receive the second message in order to learn in advance, preferably, described the first message at least also comprises: the transmission time information of the second message.
Preferably, described the first message can comprise the delivery time of the second message at least, and/or the transmission duration of the second message, and/or the transmission cycle of the second message, it for example is the delivery time of the second message, the transmission duration of the second message, with in transmission cycle of the second message any one, the perhaps combination of the one or both in the transmission cycle of the transmission duration of the delivery time of the second message and the second message and the second message, preferably, the transmission time information of described the second message comprises at least: the delivery time information of the second message, the perhaps combination of the one or both in the transmission cycle information of the transmission duration information of the delivery time information of the second message and the second message and the second message.Thereby receiving system can be predicted delivery time, transmission duration, the transmission cycle of the second message, in order to receive the second message in the corresponding time.
Alternatively, described the first receiving element 110 can periodically receive described the first message.Wherein said the first message can periodically be sent, and is for example periodically sending in the beacon frame.
Described the second receiving element 130 can be used for receiving the second message according to the transmission time information of the second message.
Preferably, at least comprise at the transmission time information of described the second message in the situation of transmission duration information of the delivery time information of the second message and the second message, when described judging unit 120 judges that described the second News Category information does not satisfy acceptable conditions, described receiving system can enter sleep pattern according to the transmission time information of the second broadcast message, like this when receiving station judges that the second message of broadcasting does not belong to acceptable classification, this receiving system just can begin to enter sleep pattern by corresponding delivery time at the transmission time information of described the second message, and do not receive the second message, avoid the waste of electric weight, wherein the duration of sleep pattern can be the transmission duration of the second message.
According to a kind of execution mode, described the first receiving element 110 or the second receiving element 120 can be used for receiving the aggregate packet of the first message and the second message.If judging unit 120 judges that described the second message does not satisfy acceptable conditions, then described the first receiving element 110 or the second receiving element 120 can abandon the aggregate packet of the first message and the second message, do not resolve the second follow-up in aggregate packet message.
Preferably, mistake occurs in the frame transmission course, described the second message or can also comprise corresponding to the broadcast frame of the second message: frame head verification sequence field, described frame head verification sequence field are used for the frame head of described the second message is carried out verification.Wherein after described the second receiving element 120 receives described the second message, carry out verification according to frame head verification sequence field, when check results when being correct, can judge that according to the classification information of the second indicated message of the classification field in described the second message frame head whether the second corresponding message satisfies acceptable conditions, determines whether to abandon the second message that is receiving by judging unit 120.
The present invention also provides a kind of device that sends message, and as shown in figure 12, this device can comprise: the first transmitting element 210, be used for sending the first message, and described the first message comprises the classification information of the second message; The second transmitting element 220 is used for sending the second message.So that receiving station can be known the classification of second message that will receive in advance before receiving the second message, further selectively receive according to second message of described classification to follow-up transmission more thus.
Preferably, described the first message and described the second message can all be broadcast or all be multicast message.
Alternatively, send the first message in the situation that described the first transmitting element 210 can reach predetermined threshold for transmission duration or the frame length in the second message, wherein said predetermined threshold can preset by sending website, thereby can surpass in the situation of certain-length at transmission duration or the frame length of the second message, in the first message, announce in advance the classification of the second message.
Alternatively, described the second transmitting element 220 can be used for after described the first transmitting element 210 sends the first message through sending the second message after the scheduled time.When the first message is sent, can send the second message through too short frame pitch duration, described the second message can comprise the particular content that will broadcast.The described scheduled time can be predefined, for example can be a SIFS duration.
In order to inform in advance when receiving system will receive the second message, preferably, described the first message at least also comprises: the transmission time information of the second message.
Preferably, described the first message can comprise the delivery time of the second message at least, and/or the transmission duration of the second message, and/or the transmission cycle of the second message, it for example is the delivery time of the second message, the transmission duration of the second message, with in transmission cycle of the second message any one, the perhaps combination of the one or both in the transmission cycle of the transmission duration of the delivery time of the second message and the second message and the second message, preferably, the transmission time information of described the second message comprises at least: the delivery time information of the second message, the perhaps combination of the one or both in the transmission cycle information of the transmission duration information of the delivery time information of the second message and the second message and the second message.Thereby, can inform in advance receiving system the second message delivery time, send duration, transmission cycle, in order to receive the second message in the corresponding time.
Alternatively, the first receiving element 110 can be used for periodically sending described the first message.Wherein said the first message can periodically be sent, and is for example periodically sending in the beacon frame.
Described the second transmitting element 220 can be used for delivery time information or the delivery time information of the second message of comprising according to the first message and send cycle information sending the second message.
According to a kind of execution mode, the device of described transmission message can also carry out polymerization to described the first message and the second message, is sent the aggregate packet of the first message and the second message by described the first transmitting element 210 or the second transmitting element 220.
Preferably, mistake occurs in message transmitting procedure, described the second message or can also comprise corresponding to the broadcast frame of the second message: frame head verification sequence field, described frame head verification sequence field are used for the frame head of described the second message is carried out verification.Owing in the second message frame head, having comprised classification field and frame head verification sequence field, so that receiving system can carry out verification according to frame head verification sequence field, when check results when being correct, judge that according to the classification information of the second indicated message of the classification field in described the second message frame head whether the second corresponding message satisfies acceptable conditions, determines whether to abandon the second message that is receiving.
The present invention also provides a kind of broadcast system, and this system comprises the device of described receipt message and the device of described transmission message.
Should be understood that; execution mode described above only is preferred implementation of the present invention; for the person of ordinary skill of the art; under the prerequisite that does not break away from the principle of the invention; can also make multiple suitable modification and combination; for example; the first receiving element 110 in the described receiving system and the second receiving element 130 can be merged in the same receiving element and realize; the first transmitting element 210 in the described dispensing device and the second transmitting element 220 merged in the same transmitting element realize, and these modifications and combination also should be considered as belonging to protection scope of the present invention.
Claims (29)
1. the method for a receipt message is characterized in that, the method comprises:
Receive the first message, described the first message comprises the classification information of the second message;
When the classification information of described the second message satisfies acceptable conditions, receive the second message.
2. method according to claim 1 is characterized in that, wherein said the first message and described the second message all are broadcast or all are multicast message.
3. method according to claim 1 and 2 is characterized in that, the step that receives the second message when described the second News Category information satisfies acceptable conditions comprises:
When the classification information of the second message that comprises when the first message belongs to the local reception classification information, receive the second message.
4. the described method of each claim is characterized in that according to claim 1-3, and described the first message at least also comprises:
The transmission time information of the second message.
5. method according to claim 4 is characterized in that, the transmission time information of described the second message comprises at least:
The combination of the one or both in the transmission duration information of the delivery time information of the second message or the delivery time information of the second message and the second message, the transmission cycle information of the second message.
6. method according to claim 4 is characterized in that, the step that receives the second message when the classification information of described the second message satisfies acceptable conditions comprises:
Transmission time information according to the second message receives the second message.
7. method according to claim 5 is characterized in that, the method also comprises:
At least comprise at the transmission time information of described the second message in the situation of transmission duration information of the delivery time information of the second message and the second message, when described the second News Category information does not satisfy acceptable conditions, enter sleep pattern according to the transmission time information of described the second message.
8. a method that sends message is characterized in that, the method comprises:
Send the first message, described the first message comprises the classification information of the second message;
Send the second message.
9. method according to claim 8 is characterized in that, described the first message and described the second message all are broadcast or all are multicast message.
10. according to claim 8 or 9 described methods, it is characterized in that, described the first message also comprises:
The transmission time information of the second message.
11. method according to claim 10 is characterized in that, the transmission time information of described the second message comprises at least:
The combination of the one or both in the transmission duration information of the delivery time information of the second message or the delivery time information of the second message and the second message, the transmission cycle information of the second message.
12. method according to claim 11 is characterized in that, the step that sends the second message comprises:
The delivery time information of the second message that comprises according to the first message or delivery time information and send cycle information and send the second message.
13. method according to claim 11 is characterized in that, the first message is to send in the situation that the transmission duration of the second message or frame length reach predetermined threshold.
14. according to claim 8 or 9 described methods, it is characterized in that, the step that sends the second message comprises:
After sending the first message, send the second message after the process scheduled time.
15. the device of a receipt message is characterized in that, this device comprises:
The first receiving element is used for receiving the first message, and described the first message comprises the classification information of the second message;
Judging unit is used for judging whether the classification information of described the second message satisfies acceptable conditions;
The second receiving element is used for receiving the second message when the classification information of described the second message of described judgment unit judges satisfies acceptable conditions.
16. device according to claim 15 is characterized in that, described the first message and described the second message all are broadcast or all are multicast message.
17. according to claim 15 or 16 described devices, it is characterized in that:
Described judging unit is used for judging whether the classification information of described the second message belongs to the local reception classification information; And
When the classification information that described the second receiving element is used for the second message of comprising in described judgment unit judges the first message belongs to the local reception classification information, receive the second message.
18. the described device of each claim is characterized in that according to claim 15-17, described the first message at least also comprises:
The transmission time information of the second message.
19. device according to claim 18 is characterized in that, the transmission time information of described the second message comprises at least:
The combination of the one or both in the transmission duration information of the delivery time information of the second message or the delivery time information of the second message and the second message, the transmission cycle information of the second message.
20. device according to claim 18 is characterized in that, described the second receiving element is used for receiving the second message according to the transmission time information of described the second message.
21. device according to claim 19, it is characterized in that, at least comprise at the transmission time information of described the second message in the situation of transmission duration information of the delivery time information of the second message and the second message, when described the second News Category information of described judgment unit judges did not satisfy acceptable conditions, described receiving system entered sleep pattern according to the transmission time information of described the second message.
22. a device that sends message is characterized in that, this device comprises:
The first transmitting element is used for sending the first message, and described the first message comprises the classification information of the second message;
The second transmitting element is used for sending the second message.
23. device according to claim 22 is characterized in that, described the first message and described the second message all are broadcast or all are multicast message.
24. according to claim 22 or 23 described devices, it is characterized in that, described the first message also comprises:
The transmission time information of the second message.
25. device according to claim 24 is characterized in that, the transmission time information of described the second message comprises at least:
The combination of the one or both in the transmission duration information of the delivery time information of the second message or the delivery time information of the second message and the second message, the transmission cycle information of the second message.
26. device according to claim 25 is characterized in that, described the second transmitting element is used for delivery time information or the delivery time information of the second message of comprising according to the first message and sends cycle information sending the second message.
27. device according to claim 25 is characterized in that, the first message is to send in the situation that the transmission duration of the second message or frame length reach predetermined threshold.
28. according to claim 22 or 23 described devices, it is characterized in that, described the second transmitting element is used for described the first transmitting element sends the first message after through transmission the second message after the scheduled time.
29. a broadcast system is characterized in that, this system comprises the device of the described transmission message of each claim among the device of the described receipt message of each claim among the claim 13-18 and the claim 19-24.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100618965A CN103313198A (en) | 2012-03-09 | 2012-03-09 | Message reception and transmission method and device, and broadcast system |
| PCT/CN2013/072382 WO2013131495A1 (en) | 2012-03-09 | 2013-03-11 | Method and device for receiving and sending message and broadcasting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100618965A CN103313198A (en) | 2012-03-09 | 2012-03-09 | Message reception and transmission method and device, and broadcast system |
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| CN103313198A true CN103313198A (en) | 2013-09-18 |
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| CN2012100618965A Pending CN103313198A (en) | 2012-03-09 | 2012-03-09 | Message reception and transmission method and device, and broadcast system |
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| CN (1) | CN103313198A (en) |
| WO (1) | WO2013131495A1 (en) |
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| WO2013131495A1 (en) | 2013-09-12 |
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