WO2014029226A1 - 组播信息传输方法及设备 - Google Patents

组播信息传输方法及设备 Download PDF

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Publication number
WO2014029226A1
WO2014029226A1 PCT/CN2013/077055 CN2013077055W WO2014029226A1 WO 2014029226 A1 WO2014029226 A1 WO 2014029226A1 CN 2013077055 W CN2013077055 W CN 2013077055W WO 2014029226 A1 WO2014029226 A1 WO 2014029226A1
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WO
WIPO (PCT)
Prior art keywords
multicast
sta
information
group
sent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2013/077055
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English (en)
French (fr)
Chinese (zh)
Inventor
赵牧
姜艳平
甄斌
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to JP2015527764A priority Critical patent/JP6040465B2/ja
Priority to EP13831269.9A priority patent/EP2876840A4/en
Publication of WO2014029226A1 publication Critical patent/WO2014029226A1/zh
Priority to US14/623,112 priority patent/US20150163646A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H04W4/08—User group management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/16—Arrangements for providing special services to substations
    • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • H04L12/185—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast with management of multicast group membership
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/16—Arrangements for providing special services to substations
    • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • H04L12/189—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast in combination with wireless systems

Definitions

  • the present invention relates to communication technologies, and in particular, to a multicast information transmission method and device. Background technique
  • Up to 6000 sensor stations can be supported in the 802.11ah application scenario.
  • these STAs can be placed on water meters, electricity meters, and gas meters, respectively.
  • These water, electricity, and gas meters can be subordinate to different or identical water, electricity, and gas retail companies. These different or identical water, electricity, and gas retailers.
  • the company can send information to these water, electricity, and gas meters in the same or different periods through wireless access points (APs), or update these water, electricity, and gas meters as needed.
  • APs wireless access points
  • the above application scenarios show that in an 802.11ah scenario, each AP has the need to send multicast information of different periods and different contents to different STAs.
  • the STA initially works in the normal mode.
  • the STA receives each beacon frame (Beacon) containing a Delivery Traffic Indication Map (DTIM), and the DTIM indication.
  • the multicast group will have downlink data to be sent. If the multicast group to which the STA belongs has downlink data, the STA receives all the multicast information after the beacon frame, and then filters out the multicast information of the multicast group.
  • a Flexible Multicast Service (FMS) mode is proposed.
  • FMS Flexible Multicast Service
  • the STA negotiates with the AP to determine the multicast period to be used. The STA receives the multicast information according to the multicast period determined by the negotiation.
  • the AP uses the FMS ID of 8 bits in the beacon frame to identify the upcoming transmission.
  • the multicast information belongs to which multicast period. Although this method reduces the number of times the STA listens to the beacon frame, once the STA receives the beacon frame, it also needs to receive all the multicast information after the beacon frame, and then filter from it. Out of own multicast information. It can be seen that regardless of the mode in which the STA works, the STA has a problem of wasting resources. Summary of the invention
  • Embodiments of the present invention provide a multicast information transmission method and device, which are used to mitigate STAs. Waste of resources.
  • a first aspect of the embodiments of the present invention provides a method for transmitting multicast information, including: sending, to a station STA, a transmit transmission indication map DTIM beacon frame, where the DTIM beacon frame is used to indicate multicast with multicast information transmission.
  • the multicast information of the multicast group where the STA is located is received at a receiving interval corresponding to the multicast group where the STA is located.
  • the sending, by the STA, the sending of the transmission indication mapping DTIM beacon frame includes: sending, to the STA, a multicast ID of the multicast group where the STA is located.
  • the sending, by the STA, the multicast ID of the multicast group where the STA is located includes: mapping the multicast ID of the multicast group where the STA is located Association identifier AID.
  • the DTIM beacon frame is used to indicate that the multicast group that has the multicast information sent includes: using a part of the virtual bitmap in the DTIM beacon frame to indicate A multicast group that describes multicast information transmission.
  • the preset sending interval is an average sending duration or a beacon frame interval of the multicast information.
  • a second aspect of the embodiments of the present invention provides a method for receiving a multicast information, including: receiving, by a station STA, a transmit transmission indication map DTIM beacon frame sent by a radio access point AP, where the DTIM beacon frame is used to indicate that Multicast group for multicast information transmission;
  • the STA is in the order of the multicast IDs of the multicast groups in which the multicast information is sent, according to the multicast identifier of the multicast group in which the STA is located, in the receiving interval corresponding to the multicast group where the STA is located. Receiving multicast information of the multicast group where the STA is sent by the AP.
  • the receiving interval is an average sending duration or a beacon frame interval of the multicast information.
  • the multicast ID of each multicast group that has multicast information sent is an association identifier AID.
  • a third aspect of the embodiments of the present invention provides a method for sending a multicast identifier, including: Determining the multicast ID of the multicast group where the STA is located, and the multicast ID of the multicast group where the STA is located is mapped to the association identifier AID;
  • the mapping the multicast ID of the multicast group in which the STA is located in the AID includes: mapping the multicast ID of the multicast group where the STA is located in the In a page, a block or a sub-block in the AID; or mapping a multicast ID of a multicast group in which the STA is located to a block and a sub-block in the at least two AIDs.
  • the sending the multicast ID of the multicast group where the STA is located to the STA includes: encapsulating a multicast ID of the multicast group where the STA is located The management frame or the control frame is sent to the STA; or, the cell IE is added to the existing management frame or the existing control frame or the existing data frame, and the multicast ID of the multicast group where the STA is located is encapsulated in the The newly added IE is sent to the STA.
  • a fourth aspect of the embodiments of the present invention provides a multicast identifier receiving method, including: a station STA receives a multicast identifier ID of a multicast group where the STA is sent by a radio access point AP, where the STA is located in the multicast The multicast ID of the group is mapped to the association identifier AID; the STA records the multicast ID of the multicast group where the STA is located.
  • the receiving, by the station STA, the multicast identifier ID of the multicast group where the STA is sent by the radio access point AP includes: the STA receiving the AP sending a management frame or a control frame, where the management frame or the control frame includes a multicast ID of the multicast group where the STA is located; or the STA receives an existing management frame or an existing control frame sent by the AP or The existing data frame, the newly added cell IE in the existing management frame or the existing control frame or the existing data frame includes the multicast ID of the multicast group where the STA is located.
  • the receiving, by the station STA, the multicast identifier ID of the multicast group where the STA is sent by the radio access point AP includes: sending, by the STA, the AP Requesting the information of the multicast ID; the STA receives the multicast ID of the multicast group in which the STA is located according to the information of the requested multicast ID.
  • a fifth aspect of the embodiments of the present invention provides a wireless access point AP, including: a first sending module, configured to send, to a station STA, a transmit transmission indication map DTIM beacon frame, where the DTIM beacon frame is used to indicate that Multicast group for multicast information transmission;
  • a second sending module configured to perform, according to the multicast identifier of the multicast group that has the multicast information
  • the size sequence of the multicast group in the multicast transmission group is sent in the preset transmission interval, so that the STA receives the STA at the receiving interval corresponding to the multicast group where the STA is located.
  • Multicast information of a multicast group is sent in the preset transmission interval, so that the STA receives the STA at the receiving interval corresponding to the multicast group where the STA is located.
  • the AP further includes: a third sending module, configured to send, before the first sending module sends the DTIM beacon frame to the STA, The STA sends the multicast ID of the multicast group where the STA is located.
  • the AP further includes: a mapping module, configured to: before the third sending module sends the multicast ID of the multicast group where the STA is located, to the STA And mapping the multicast ID of the multicast group where the STA is located in the association identifier AID.
  • a mapping module configured to: before the third sending module sends the multicast ID of the multicast group where the STA is located, to the STA And mapping the multicast ID of the multicast group where the STA is located in the association identifier AID.
  • the DTIM beacon frame is used to indicate that the multicast group that has the multicast information sent includes: using a partial virtual bitmap indication in the DTIM beacon frame A multicast group that describes multicast information transmission.
  • a sixth aspect of the embodiments of the present invention provides a station STA, including:
  • a fifth receiving module configured to receive a transmission transmission indication map DTIM beacon frame sent by the radio access point AP, where the DTIM beacon frame is used to indicate a multicast group with multicast information transmission; And receiving, according to the order of the multicast IDs of the multicast group in which the STA is located, in the multicast ID of the multicast group that has the multicast information, in the receiving interval corresponding to the multicast group where the STA is located.
  • the receiving interval is an average sending duration or a beacon frame interval of the multicast information.
  • the multicast ID of each multicast group that has multicast information sent is an association identifier AID.
  • a seventh aspect of the embodiments of the present invention provides a radio access point AP, including: a determining module, configured to determine a multicast ID of a multicast group where a STA is located, and a multicast ID mapping of the multicast group where the STA is located.
  • a radio access point AP including: a determining module, configured to determine a multicast ID of a multicast group where a STA is located, and a multicast ID mapping of the multicast group where the STA is located.
  • the tenth sending module is configured to send the multicast ID of the multicast group where the STA is located to the STA.
  • the determining, by the determining module, the multicasting ID of the multicast group where the STA is located in the AID includes: the determining module is specifically configured to: The multicast ID of the multicast group in which the STA is located is mapped in any page, block or sub-block of the AID; or the multicast ID of the multicast group where the STA is located is mapped to the block in the at least two AIDs. And sub-blocks.
  • the tenth sending module is specifically configured to encapsulate the multicast ID of the multicast group where the STA is located in a management frame or a control frame, and send the message to the STA;
  • the tenth sending module is configured to add a cell IE to the management frame or the control frame or the data frame, and encapsulate the multicast ID of the multicast group where the STA is located in the newly added IE, and send the STA.
  • the AP further includes: a tenth receiving module, configured to receive information about the requested multicast ID sent by the STA;
  • the tenth sending module is specifically configured to send, according to the information about the requested multicast ID, the multicast ID of the multicast group where the STA is located to the STA.
  • An eighth aspect of the embodiments of the present invention provides a station STA, including:
  • a fourteenth receiving module configured to receive a multicast identification ID of the multicast group in which the STA is located, and the multicast ID of the multicast group where the STA is located is mapped in the association identifier AID;
  • the storage module is configured to record the multicast ID of the multicast group where the STA is located.
  • the fourteenth receiving module is configured to receive a management frame or a control frame that is sent by the AP, where the management frame or the control frame includes the group where the STA is located.
  • the fourteenth receiving module is configured to receive an existing management frame or an existing control frame or an existing data frame sent by the AP, and add the existing management frame or an existing control frame or an existing data frame.
  • the cell IE includes the multicast ID of the multicast group where the STA is located.
  • the STA further includes: a thirteenth sending module, configured to send, to the AP, information that requests a multicast ID; Receiving, by the AP, the multicast ID of the multicast group where the STA is located according to the information about the multicast ID requesting.
  • the multicast information sending and receiving method and device provided by the embodiment of the present invention indicate that a multicast group that has multicast information is sent by using a DTIM beacon frame, and the AP performs a multicast group according to the multicast information.
  • the order of the size of the multicast ID in turn, the multicast information of the multicast group that has the multicast information sent in the sending interval, and the STA according to the multicast ID of the multicast group in which the STA is located in the multicast group that has the multicast information.
  • the sequence of the size of the multicast ID is used to receive the multicast information of the multicast group in the multicast receiving interval. This solves the problem of all the multicast information after the STAs receive the beacon frame in the prior art. Waste of resources.
  • the multicast ID sending and receiving method and the device provided by the embodiment of the present invention use the AID as the multicast ID of the multicast group, and the AP sends the multicast ID of the multicast group where the STA is located to the STA, so that the STA can know the group in which the STA is located.
  • the multicast ID of the broadcast group utilizes the AID as a multicast ID to utilize the rich feature of the AID resource, which solves the problem that the multicast application is limited due to the limited number of multicast cycles supported by the FSM ID in the prior art.
  • FIG. 1 is a flowchart of a method for sending multicast information according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a method for transmitting multicast information according to another embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of an AID according to an embodiment of the present invention
  • FIG. 4 is a flowchart of a method for receiving multicast information according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a sequence of receiving multicast information according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram of another sequence for receiving multicast information according to an embodiment of the present invention
  • FIG. 8 is a flowchart of a method for sending a multicast identifier according to an embodiment of the present invention
  • FIG. 9 is a flowchart of a method for receiving a multicast identifier according to an embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of an AP according to an embodiment of the present disclosure.
  • FIG. 11 is a schematic structural diagram of an AP according to another embodiment of the present disclosure.
  • FIG. 12 is a schematic structural diagram of an AP according to another embodiment of the present disclosure.
  • FIG. 13 is a schematic structural diagram of a STA according to an embodiment of the present disclosure
  • FIG. 14 is a schematic structural diagram of a STA according to another embodiment of the present invention.
  • FIG. 15 is a schematic structural diagram of a STA according to another embodiment of the present invention.
  • 16 is a schematic structural diagram of an AP according to another embodiment of the present invention.
  • FIG. 17 is a schematic structural diagram of an AP according to another embodiment of the present invention.
  • FIG. 18 is a schematic structural diagram of an AP according to another embodiment of the present invention.
  • FIG. 19 is a schematic structural diagram of a STA according to another embodiment of the present invention.
  • FIG. 20 is a schematic structural diagram of a STA according to another embodiment of the present invention.
  • FIG. 21 is a schematic structural diagram of a STA according to another embodiment of the present invention.
  • the following embodiments of the present invention will be described.
  • the technical solutions are described in a clear and complete manner, and it is obvious that the described embodiments are a part of the embodiments of the invention, rather than all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.
  • FIG. 1 is a flowchart of a method for transmitting multicast information according to an embodiment of the present invention.
  • the execution subject of this embodiment is an AP, but is not limited thereto.
  • the method in this embodiment includes: Step 101: Send a DTIM beacon frame to a STA, where the DTIM beacon frame is used to indicate a multicast group that has multicast information to be sent.
  • Step 102 Send the group of the multicast group with the multicast information sent in the preset sending interval in sequence according to the size of the multicast identifier (Identification, for short) of the multicast group that has the multicast information. Broadcast information, so that the STA receives the multicast information of the multicast group where the STA is located at the receiving interval corresponding to the multicast group where the STA is located.
  • the multicast identifier Identity, for short
  • the order of the size of the multicast ID may be from large to small, or from small to large.
  • the order of the multicast IDs that the AP sends according to is the same as the order of the multicast IDs that the STAs receive. They are either in descending order or in descending order.
  • each multicast group has a multicast ID, which is used to uniquely identify the multicast group.
  • the AP stores multicast information of each multicast group that has multicast information to be sent.
  • the AP first sends a beacon frame to the STA.
  • the type indication bit in the beacon frame indicates that the beacon frame is a DTIM beacon frame, and the DTIM beacon frame indicates on the one hand that the DTIM beacon frame will transmit multicast information, and on the other hand, indicates that the multicast information is transmitted. Broadcast group.
  • the AP sends the multicast information of the multicast groups in the transmission interval according to the order of the multicast IDs of the multicast groups that are sent by the multicast information, so that the STA can multicast according to the multicast group in which the STA is located.
  • the ID receives the multicast information of the multicast group in the corresponding receiving interval, and does not receive the multicast information of other multicast groups.
  • the preset sending interval may be an average sending duration of the multicast information.
  • the AP allocates a length to each multicast group that has multicast information in the order of the multicast IDs of the multicast groups that have multicast information.
  • the average transmission time of the multicast information is used as the transmission interval.
  • the multicast information of the corresponding multicast group is sent in the allocated transmission interval, and the multicast information of the multicast group is sequentially transmitted according to the size of the multicast ID. .
  • the average duration of sending the multicast information may be a preset experience value.
  • the average transmission duration of the multicast information may be the size of the multicast information to be sent by each multicast group before the AP transmits the multicast information after determining the multicast group to which the multicast information is to be sent. The rate of transmission is calculated.
  • the foregoing sending interval may be a beacon frame interval (Beacon Interval in English), where the beacon frame interval refers to an interval between two beacon frames.
  • the beacon frame here includes a TIM beacon frame indicating that the bit is a Traffic Indication Map (TIM), and also includes a DTIM beacon frame.
  • the AP may send a TIM beacon frame before the next DTIM beacon frame after the current DTIM beacon frame, and the AP may send the multicast information of the multicast group after the current DTIM beacon frame.
  • the multicast information of the multicast group is transmitted after the current DTIM beacon frame and the TIM beacon frame between the current DTIM beacon frame and the next DTIM beacon frame.
  • the AP may send the multicast information of the multicast group after the DTIM beacon frame, or may send the multicast information of the multicast group after the TIM beacon frame before the next DTIM beacon frame.
  • the number of TIM beacon frames transmitted by the AP between two DTIM beacon frames can be adaptively determined. If the number of TIM beacon frames between two DTIM beacon frames is greater than or It is equal to the number of multicast groups that have multicast information to be sent. Preferably, the AP may send multicast information of one multicast group after each TIM beacon frame, but is not limited thereto. If the number of TIM beacon frames between two DTIM beacon frames is smaller than the number of multicast groups with multicast information sent, the AP may simultaneously be behind one of the TIM beacon frames or the current DTIM beacon frame. The multicast information of at least two multicast groups is sent to ensure that the multicast information of each multicast group can be successfully sent to the STA.
  • FIG. 2 is a flowchart of a method for sending multicast information according to another embodiment of the present invention. This embodiment is implemented based on the embodiment shown in FIG. 1. As shown in FIG. 2, the method in this embodiment includes before step 101:
  • Step 100 Send the multicast ID of the multicast group where the STA is located to the STA.
  • the AP sends the multicast ID of the multicast group in which the STA is located to the STA, and then sends the multicast ID of the multicast group to which the STA is located, in the order of the multicast IDs of the multicast groups that are sent by the multicast information.
  • the STA knows the multicast ID of its own multicast group in advance, and then receives the multicast information of its own multicast group in the corresponding receiving interval according to the multicast ID of the multicast group.
  • the STA stores the received multicast ID of the multicast group that it is in locally.
  • the AP may initiate the allocation of the multicast ID, that is, the AP sends the multicast ID of the multicast group where the STA is located to the STA.
  • the STA may actively request the AP to request the multicast ID of the multicast group in which it belongs.
  • An embodiment of the method includes: the AP receives the information of the requested multicast ID sent by the STA, and the AP sends the multicast ID of the multicast group of the STA to the STA according to the received information of the requested multicast ID.
  • the information of the requesting multicast ID sent by the STA may be a Media Access Control (MAC) address of the STA, an IP address, or other information that can uniquely identify the STA.
  • the AP identifies the STA according to the information of the multicast ID that is sent by the STA, and then determines the multicast ID of the multicast group where the STA is located.
  • the AP may allocate the multicast ID to the STA in real time, or directly obtain the pre-assigned multicast ID.
  • the STA sends the information requesting the multicast ID to the AP.
  • the STA encapsulates the information of the requested multicast ID in a request message and sends the information to the AP.
  • the specific manner of receiving the information of the requesting multicast ID sent by the STA is: the AP receives the request message sent by the STA, where the request message includes the information of the requested multicast ID, and the AP specifically obtains the information from the request message.
  • the information requesting the multicast ID can be a new message.
  • the STA adds a cell element to the existing control frame or the existing management frame or the existing data frame (Information Element)
  • the information of the requested multicast ID is encapsulated in a newly added IE and sent to the AP.
  • the specific manner of receiving the information of the requesting multicast ID sent by the STA is: The AP receives the existing control frame or the existing management frame or the existing data frame sent by the STA, and the existing control frame or the existing management frame
  • the newly added IE in the existing data frame includes the information about the requested multicast ID, and the AP obtains the request multicast from an existing IE or an existing IE or an existing IE in an existing data frame. ID information.
  • the AP sends the multicast ID of the multicast group where the STA is located to the STA.
  • the AP encapsulates the multicast ID of the multicast group where the STA is located in the newly added management frame or adds a new one.
  • the control frame is sent to the STA.
  • another specific implementation manner in which the AP sends the multicast ID of the multicast group where the STA is located to the STA is: the AP adds an IE to the existing management frame or the existing control frame or the existing data frame.
  • the multicast ID of the multicast group in which the STA is located is encapsulated in the newly added IE and sent to the STA.
  • the STA may send an acknowledgement (ACK) message to the AP, so that the AP can know in time whether the STA successfully receives the multicast of the STA.
  • the multicast ID of the group Based on this, after the AP sends the multicast ID of the multicast group where the STA is located to the STA, the AP includes: the AP receives the ACK message sent by the STA.
  • the AP needs to resend the multicast ID of the multicast group where the STA is located.
  • the AP may also initiate a logout process of the multicast ID. Based on this, the method in this embodiment further includes: the AP sending a multicast ID deregistration message to the STA, where the multicast ID deregistration message includes a logout indication indicating that the multicast ID of the multicast group where the STA is located is logged off.
  • the multicast ID deregistration message may further include a multicast ID that needs to be logged off (that is, a multicast ID of the multicast group where the STA is located).
  • the STA receives the multicast ID deregistration message sent by the AP, and learns that the multicast ID of the multicast group in which the AP is located needs to be logged off, and the association relationship with the multicast ID is released based on this.
  • the STA may send an ACK message to the AP to notify the AP that the multicast ID deregistration message has been received.
  • the AP is sending to the STA.
  • the ACK message sent by the STA is received. On the premise of sending an ACK message, if the AP does not receive the ACK message within a certain period of time, it needs to resend the multicast ID deregistration message to the STA that has not received its ACK message.
  • An optional implementation manner in which the AP sends a multicast ID deregistration message to the STA includes: the AP uses the newly added management frame or the newly added control frame to cancel the multicast ID, and encapsulates the newly added management frame or added The control frame is sent to the STA.
  • Another optional implementation manner in which the AP sends a multicast ID deregistration message to the STA includes: the AP adds an IE to an existing management frame or a control frame or a data frame, and encapsulates the multicast ID deregistration message in the newly added IE. Send to the corresponding STA.
  • the process of deregistering the multicast ID may be initiated by the STA.
  • the STA when the STA needs to be disassociated with the multicast group, the STA sends a multicast ID logout request to the AP to request to release the group.
  • the method in this embodiment further includes: the AP receives the multicast ID deregistration request sent by the STA, and the optional multicast ID deregistration request includes the multicast ID of the multicast group where the STA is located, that is, the multicast ID that needs to be logged off. Then, according to the received multicast ID logout request, the multicast ID of the multicast group where the STA is located is logged out.
  • the AP may also send an ACK message to the SAT after receiving the multicast ID deregistration request.
  • An optional implementation manner in which the STA sends a multicast ID deregistration request to the AP includes: the STA uses the request message, and encapsulates the multicast ID deregistration request in a request message and sends the request to the AP.
  • the specific implementation manner of the AP receiving the multicast ID cancellation request sent by the STA includes: receiving, by the AP, a request message sent by the STA, and acquiring the multicast ID cancellation request from the request message.
  • the request message here can also be a new message.
  • Another optional implementation manner in which the STA sends a multicast ID deregistration request to the AP includes: the STA adds an IE in an existing control frame or a management frame or a data frame, and encapsulates the multicast ID deregistration request in a new The IE is sent to the AP.
  • the specific implementation manner of the AP receiving the multicast ID cancellation request sent by the STA includes: receiving, by the AP, an existing control frame or a management frame or a data frame sent by the STA, from the existing control frame or the management frame or the data frame.
  • the multicast ID logout request is obtained in the added IE.
  • the AP may also initiate a change of the multicast ID.
  • the method in this embodiment further includes: the AP sends a multicast ID change message to the STA, where the multicast ID change message includes the changed multicast ID of the multicast group where the STA is located.
  • the multicast ID is changed.
  • the information may also include the original multicast ID of the multicast group where the STA is located.
  • the original multicast ID of the multicast group is the multicast ID that needs to be changed, and the new multicast ID used by the multicast group is the changed multicast ID.
  • the STA receives the multicast ID change message sent by the AP, and learns that it is necessary to change the multicast ID and determine the changed multicast ID.
  • the STA may send an ACK message to the AP.
  • the AP may send an ACK message to the AP.
  • the AP needs to resend the multicast ID change message to the STA that has not received the ACK message.
  • An optional implementation manner for the AP to send the multicast ID change message to the STA includes: the AP uses the newly added management frame or the newly added control frame to encapsulate the multicast ID change message in the newly added management frame or the added control. The frame is sent to the STA.
  • Another optional implementation manner in which the AP sends a multicast ID change message to the STA includes: the AP adds an IE to the existing management frame or the control frame or the data frame, and encapsulates the multicast ID change message in the newly added IE. Send to the corresponding STA.
  • the change of the multicast ID may be initiated by the STA.
  • the STA may send a multicast ID change request to the AP, and then the receiving AP changes according to the multicast ID.
  • the multicast ID change message to be sent the multicast ID change message includes the changed multicast ID of the multicast group where the STA is located.
  • the AP sends a multicast ID change message to the STA.
  • the AP receives the multicast ID change request sent by the STA, and sends a multicast ID change message to the STA according to the multicast ID change request.
  • the multicast ID change request may include a MAC address, an IP address, or other information that can uniquely identify the STA.
  • the AP may re-assign a multicast ID to the STA according to the information carried in the multicast ID change request, and then send the re-assigned multicast ID to the STA as the changed multicast ID.
  • An optional implementation manner in which the STA sends a multicast ID change request to the AP includes: the STA uses the newly added request message, and encapsulates the multicast ID change request in the newly added request message and sends the request to the AP.
  • the specific implementation manner of the AP receiving the multicast ID change request sent by the STA includes: the AP receives the newly added request message sent by the STA, and obtains the multicast ID change request from the newly added request message.
  • Another optional implementation manner in which the STA sends a multicast ID change request to the AP includes: the STA adds an IE to an existing control frame or a management frame or a data frame, and changes the multicast ID.
  • the encapsulation is sent to the AP in the newly added IE.
  • the specific implementation manner of the AP receiving the multicast ID change request sent by the STA includes: the AP receives an existing control frame or a management frame or a data frame sent by the STA, and newly adds an existing control frame or a management frame or a data frame.
  • the multicast ID change request is obtained in the added IE.
  • the foregoing embodiments provide various implementations for the AP to send a multicast ID, a logout multicast ID, and a change multicast ID to the STA, and implement the management of the multicast ID, which has the advantages of being simple and easy to implement.
  • the multicast ID of each multicast group may be a MAC address or an FMS ID, but is not limited thereto.
  • the multicast ID of each multicast group is at least one association identifier (AID).
  • the AID here may be an AID other than the unicast AID in the AID space. Among them, which AIDs are used as unicast AIDs, and which AIDs are used as multicast IDs can be determined by the AP itself. That is, as long as the AID as the multicast ID is different from the AID used for unicast.
  • the AP may send the multicast ID of the multicast group in which the STA is located to the STA.
  • the AP maps the multicast ID of the multicast group where the STA is located in at least two AIDs.
  • the STA's AID is divided into different groups according to a page (English is Page), a block (English is Block), and a sub-block (English is Sub-block).
  • Figure 3 shows the structure of an AID that supports four Pages. In an AID structure supporting four Pages, there can be 32 Blocks in one Page, and 8 Sub-blocks in one Block, and one Sub-block can support 8 STAs. In this way, the AID of this structure can support up to 8192 STAs. Since the AID space is sufficient, in the embodiment, some of the AIDs are used as the multicast ID, so that there is no need to additionally set the multicast ID, so that there is no need to increase the beacon by carrying the set multicast ID. Frames facilitate compression of beacon frames.
  • the AP maps the multicast ID of the multicast group in which the STA is located in an AID.
  • the AP can map the multicast ID of the multicast group where the STA is located to any page in the AID. , Block and / or Sub-block.
  • the multicast IDs of multiple multicast groups can use the same AID.
  • the multicast IDs of these multicast groups can be arbitrarily allocated in different Pages, Blocks, and/or Sub-blocks.
  • the AP maps the multicast ID of the multicast group in which the STA is located in an AID.
  • the AP maps the multicast ID of the multicast group where the STA is located to the AID.
  • the multicast IDs of multiple multicast groups can also use the same AID.
  • the multicast IDs of these multicast groups can be allocated in pre-specified Page, Block and/or Sub-block. In this way, the multicast IDs of all multicast groups belong to the same Page, Block, and/or Sub-block, which is beneficial to management.
  • the AP maps the multicast ID of the multicast group in which the STA is located to at least two AIDs.
  • the specific implementation manner includes: the AP maps the multicast ID of the multicast group where the STA is located to at least two AIDs. In different Page, Block and / or Sub-block.
  • the multicast IDs of the multiple multicast groups may use the same at least two AIDs, and the multicast IDs of the multicast groups may be allocated in different Pages, Blocks, and/or Sub-blocks of the at least two AIDs.
  • the AP mapping the multicast ID of the multicast group in which the STA is located in the at least two AIDs includes: mapping, by the AP, the multicast ID of the multicast group where the STA is located in at least two The same Page, Block, and/or Sub-block in the AID.
  • the multicast IDs of multiple multicast groups can use the same at least two AIDs, and the multicast IDs of the multicast groups can be allocated in the same Page, Block, and/or Sub-block of the at least two AIDs. .
  • the manner in which the AID is used as the multicast ID of the multicast group includes but is not limited to: (1) an AID corresponds to a multicast ID of one or more multicast groups, and the multicast ID or the multicast ID can be arbitrarily allocated. In different Page, Block and / or Sub-block.
  • An AID corresponds to the multicast ID of one or more multicast groups. All AIDs used to identify the multicast ID of the multicast group use the same Page, Block, and/or Sub-block.
  • a multicast ID can be identified by multiple AIDs, which can use the same or different Page, Block, and/or Sub-block.
  • the multicast ID represented by the AID may be continuous or discontinuous.
  • the AID is used as the multicast ID of the multicast group.
  • the AID as the multicast ID can be specified by the AP, and the STA does not need to negotiate with the AP. It has strong implementation flexibility.
  • the AID as the multicast ID does not require the transmission period of the multicast information, and supports the multicast information that is periodically sent. The multicast information that is sent randomly can be applied to more application scenarios.
  • the AID resource and the FMS ID of the multicast ID are rich, which solves the limitation of the number of multicast cycles supported by the FMS ID to a certain extent. The problem of limited multicast applications.
  • the manner in which the DTIM beacon frame is used to indicate a multicast group that has multicast information is: using a partial virtual bitmap in a DTIM beacon frame (in English, a partial virtual bitmap) ) Indicates a multicast group with multicast information sent.
  • a part of the virtual bitmap is used to indicate that an STA corresponding to an AID needs to receive downlink data in a unicast case.
  • the AID is used as the multicast ID, the multicast situation is used.
  • the partial virtual bitmap that already exists in the beacon frame can be used to indicate the multicast group with the multicast message sent.
  • the bit corresponding to an AID in the partial virtual bitmap is 1, it means that the multicast group using the AID as the multicast ID has multicast information to be sent, if the bit corresponding to multiple AIDs in the partial virtual bitmap is 1 , indicates that multicast groups that use these AIDs as multicast IDs have multicast information to send. It can be seen that using the AID as the multicast ID can also notify the multicast group with multicast information transmission by using the existing bits in the beacon frame, and does not need to increase the beacon frame, which is beneficial to the compression of the beacon frame.
  • the AP sequentially sends the multicast group with the multicast information transmission at the sending interval according to the order of the multicast IDs of the multicast groups that have the multicast information.
  • the multicast information, and the STA receives the multicast information of the multicast group in the multicast receiving group according to the multicast ID of the multicast group in the multicast group.
  • FIG. 4 is a flowchart of a method for receiving multicast information according to an embodiment of the present invention. As shown in FIG. 4, the method in this embodiment includes:
  • Step 401 The STA receives the DTIM beacon frame sent by the AP, and the DTIM beacon frame is used to indicate the multicast group that has the multicast information sent.
  • Step 402 The STA receives, according to the order of the multicast IDs of the multicast group in which the STA is located, the multicast ID of the multicast group that is sent by the multicast group, and receives the sent by the AP in the receiving interval corresponding to the multicast group where the STA is located. Multicast information of the multicast group where the STA is located.
  • each multicast group has a multicast ID, which is used to uniquely identify the multicast group.
  • the AP stores multicast information of each multicast group that has multicast information.
  • a STA in a multicast group sends multicast information, it first sends a beacon frame to the STA, and the type indication bit in the beacon frame indicates that the beacon frame is a DTIM beacon frame, and the DTIM beacon frame passes through the DTIM beacon frame.
  • the STA is informed that the DTIM beacon frame will send multicast information, and on the other hand, the STA is informed which multicast group or groups of multicast messages are sent.
  • the STA receives the DTIM beacon frame sent by the AP, parses the received beacon frame, learns the multicast group to which the multicast information is to be sent, and determines the location according to the multicast ID of the multicast group in which the multicast group is located. Whether the multicast group belongs to the multicast group with multicast information to be sent as indicated by the DTIM beacon frame. After the STA determines that the multicast group to which it belongs belongs to the multicast group to which the multicast information is to be sent as indicated by the DTIM beacon frame, the STA prepares to receive the multicast information sent by the AP.
  • the multicast information of the multicast groups is sent in sequence according to the order of the multicast IDs of the multicast groups that have multicast information.
  • the processing mode that is compatible with the AP is determined, that is, the order of the multicast ID of the multicast group in which the multicast group is located is in the multicast ID of the multicast group with the multicast information sent by the DTIM beacon frame.
  • the STA needs to receive all the multicast information after the DTIM beacon frame, which is beneficial to alleviating the waste of the STA caused by the STA, and is particularly suitable for STAs with low energy consumption requirements.
  • each receiving interval is an average sending duration of the multicast information.
  • the STA receives the STAs sent by the AP in the receiving interval corresponding to the multicast group in which the STA is located, according to the multicast ID of the multicast group in which the STA is located.
  • the multicast information of the multicast group is specifically as follows: The average length of the multicast information sent by the STA is based on the multicast ID of the multicast group in which the multicast group is located. , determine your own wake-up time, and then receive multicast information.
  • Figure 5 shows the manner in which the STAs in the three multicast groups receive the corresponding multicast information.
  • the STAs in the first multicast group wake up to receive their own multicast information (that is, the multicast information of the first multicast group) after the DTIM beacon frame, and the STAs in the second multicast group are waiting for one multicast.
  • the wake-up reception belongs to The multicast information of the second multicast group (the multicast information of the second multicast group); the STAs in the third multicast group wake up and receive the multicast information of their own after waiting for the average transmission duration of the two multicast messages (ie, the third Multicast group multicast information).
  • the average length of time that the STA waits for one multicast message may also wait for one SIFS. For example, if the STA waits for the average transmission duration of two multicast messages, the total waiting duration is (the average transmission duration of two multicast messages + 2 SIFS).
  • the average duration of sending the multicast information may be a preset experience value.
  • the average transmission duration of the multicast information may be the size of the multicast information to be sent by each multicast group before the AP transmits the multicast information after determining the multicast group to which the multicast information is to be sent. The sending rate is calculated and sent to the STA.
  • each receive interval is a beacon frame interval, where the beacon frame interval is the interval between two beacon frames.
  • the beacon frame here includes both TIM beacon frames and DTIM beacon frames.
  • the STAs in each multicast group with multicast information transmission may receive the current DTIM beacon frame after the next DTIM beacon frame before the TIM beacon frame according to the order of the multicast IDs of the multicast group in which the multicast group is located. Receive their multicast messages in sequence.
  • the multicast information of one or more multicast groups may be sent after the DTIM beacon frame or the TIM beacon frame. As shown in Figure 6, the multicast group whose multicast information is sent is the first multicast group, the second multicast group, and the third multicast group. The size of the multicast ID of the three multicast groups.
  • the STAs in the first multicast group wake up to receive their own multicast information after the current DTIM beacon frame, in order of the first multicast group, the second multicast group, and the third multicast group.
  • the second multicast group wakes up to receive its own multicast information after the first TIM beacon frame after the current DTIM beacon frame (multicast of the second multicast group)
  • the third multicast group wakes up to receive its own multicast information (ie, multicast information of the third multicast group) after the second TIM beacon frame after the current DTIM beacon frame. It is explained here that the number of TIM beacon frames transmitted by the AP between two DTIM beacon frames can be adaptively determined.
  • the multicast ID may be a MAC address or an FMS ID, etc., but is not limited thereto.
  • the multicast ID is at least one AID. That is, the multicast ID of the multicast group (including the multicast group where the STA is located) with the multicast information is at least one AID. Which specific AIDs are used as unicast AIDs, and which AIDs are used as multicast IDs can be determined by the AP itself. That is, as long as the AID as the multicast ID and the AID used for unicast Not the same.
  • the manner in which the DTIM beacon frame is used to indicate the multicast group with multicast information transmission is: using a partial virtual bitmap in the DTIM beacon frame to indicate that the multicast information is sent.
  • Multicast group For example, if the bit corresponding to an AID in the partial virtual bitmap is 1, it means that the multicast group using the AID as the multicast ID has multicast information to be sent, if the bit corresponding to multiple AIDs in the partial virtual bitmap is 1 , indicates that multicast groups that use these AIDs as multicast IDs have multicast information to send. It can be seen that using the AID as the multicast ID can also notify the multicast group with multicast information transmission by using the existing bits in the beacon frame, and does not need to increase the beacon frame, which is beneficial to the compression of the beacon frame.
  • the method in this embodiment further includes: before step 401:
  • Step 400 The STA receives the multicast ID of the multicast group where the STA is sent by the AP.
  • the STA can obtain the multicast ID of the multicast group in the multicast group, and then receive the multicast information of the multicast group in the multicast group according to the multicast ID of the multicast group.
  • the AP may initiate the allocation of the multicast ID by the AP, that is, the AP sends the multicast ID of the multicast group where the STA is located to the STA.
  • the STA may receive the multicast ID of the multicast group where the STA is actively sent by the AP.
  • the STA may actively request the multicast ID of the multicast group in which the STA is located, and the STA receives the multicast ID of the multicast group where the STA is sent by the AP, and the STA sends the request multicast ID to the AP. And the STA receives the multicast ID of the multicast group where the STA is sent according to the information of the request multicast ID.
  • the information of the requested multicast ID sent by the STA may be a MAC address, an IP address, or other information that can uniquely identify the STA.
  • the AP identifies the STA according to the information of the multicast ID requested by the STA, and then determines the multicast ID of the multicast group where the STA is located.
  • the AP may allocate the multicast ID to the STA in real time, or directly obtain the pre-assigned multicast ID.
  • An optional implementation manner of the STA sending the information requesting the multicast ID to the AP includes: the STA encapsulates the information of the request multicast ID in a request message and sends the information to the AP.
  • the request message may be a new message.
  • Another optional implementation manner in which the STA sends the information requesting the multicast ID to the AP includes: the STA adds an IE in the existing control frame or the existing management frame or the existing data frame, and the information of the request multicast ID is sent. The encapsulation is sent to the AP in the newly added IE.
  • An optional implementation manner of the STA receiving the multicast ID of the multicast group in which the STA is sent by the AP includes: the STA receives the newly added management frame or the newly added control frame sent by the AP, and the newly added management frame or the newly added control
  • the frame includes the multicast ID of the multicast group where the STA is located, and the STA obtains the multicast ID of the multicast group where the STA is located from the newly added management frame or the newly added control frame.
  • Another optional implementation manner in which the STA receives the multicast ID of the multicast group in which the STA is sent by the AP includes: the STA receives the existing management frame or the existing control frame or the existing data frame sent by the AP, and the existing management frame
  • the newly added IE in the existing control frame or the existing data frame includes the multicast ID of the multicast group where the STA is located.
  • the STA is specifically new from the received existing management frame or the existing control frame or the existing data frame.
  • the multicast ID of the multicast group where the STA is located is obtained in the IE.
  • the STA may send an ACK message to the AP.
  • the AP can know in time whether the STA receives the multicast ID of the multicast group where the STA is located. If the STA is required to send an ACK message, if the AP does not receive the ACK message within a certain period of time, the AP needs to resend the multicast ID of the multicast group where the STA is located to the STA.
  • the AP may also initiate a multicast ID deactivation process, for example, the AP sends a multicast ID deregistration message to the STA, and carries a multicast indication in the multicast ID deactivation message indicating the multicast group in which the STA is located. Logout instruction for ID logout.
  • the method in this embodiment further includes: the STA receives the multicast ID cancellation message sent by the AP, and learns that the association needs to be disassociated with the multicast group in which the AP is located, and thus the association relationship between the multicast group and the required multicast group is released.
  • the STA may send an ACK message to the AP to notify the AP that the multicast ID deregistration message has been received.
  • the AP receives the ACK message sent by the STA.
  • an ACK message is sent, if the AP does not receive an ACK message within a certain period of time, it needs to resend the multicast ID logout message to the STA that has not received its ACK message.
  • An optional implementation manner of the AP sending the multicast ID deregistration message to the STA includes: the AP uses the newly added management frame or the control frame, and encapsulates the multicast ID deregistration message in a newly added management frame or control frame and sends the message to the STA.
  • the STA receives the newly added management frame or control frame sent by the AP or The data frame acquires a multicast ID logout message from the received new management frame or control frame or data frame.
  • Another optional implementation manner in which the AP sends a multicast ID deregistration message to the STA includes: the AP adds an IE to an existing management frame or a control frame or a data frame, and encapsulates the multicast ID deregistration message in the newly added IE. Send to the corresponding STA.
  • the STA receives the existing management frame or control frame or data frame sent by the AP, and obtains the multicast ID logout message from the received existing management frame or control frame or data frame.
  • the process of deregistering the multicast ID may be initiated by the STA.
  • the STA sends a multicast ID logout request to the AP.
  • the broadcast ID logout request will log out the multicast ID of the multicast group it is in.
  • the AP receives the multicast ID deregistration request sent by the STA.
  • the multicast ID deregistration request may include the multicast ID of the multicast group where the STA is located, that is, the multicast ID that needs to be logged off.
  • the AP may also send an ACK message to the SAT after receiving the multicast ID deregistration request.
  • the STA receives the ACK message sent by the AP, so as to know that the AP receives the multicast ID deregistration request in time, which facilitates the timely cancellation of the multicast ID. If the AP is required to return an ACK message, if the STA does not receive the ACK message sent by the AP within a certain period of time, the STA needs to resend the multicast ID logout request to the AP.
  • An optional implementation manner in which the STA sends a multicast ID deregistration request to the AP includes: the STA uses the newly added request message, and encapsulates the multicast ID deregistration request in the newly added request message and sends the request to the AP.
  • Another optional implementation manner in which the STA sends a multicast ID deregistration request to the AP includes: the STA adds an IE in an existing control frame or a management frame or a data frame, and encapsulates the multicast ID deregistration request in a new The IE is sent to the AP.
  • the AP may also initiate a change of the multicast ID.
  • the AP sends a multicast ID change message to the STA, where the multicast ID change message includes the multicast ID after the multicast group of the STA is changed.
  • the multicast ID change message may further include an original multicast ID of the multicast group where the STA is located.
  • the original multicast ID of the multicast group is a multicast ID that needs to be changed, and the new multicast ID of the multicast group refers to the changed multicast ID.
  • the method of this embodiment further includes: the STA receives the multicast ID change message sent by the AP, and learns that the multicast ID needs to be changed and determines the changed multicast ID.
  • the STA changes according to the multicast ID.
  • the changed multicast ID of the multicast group in which the STA is included in the message updates the multicast ID of the multicast group where the STA is located.
  • the STA may send an ACK message to the AP.
  • the AP needs to resend the multicast ID change message to the STA that has not received the ACK message.
  • An optional implementation manner of the AP sending the multicast ID change message to the STA includes: the AP uses the newly added management frame or the control frame, and encapsulates the multicast ID change message in a newly added management frame or control frame and sends the message to the STA.
  • the STA receives the newly added management frame or control frame sent by the AP, and obtains the multicast ID change message from the received new management frame or control frame.
  • Another optional implementation manner in which the AP sends a multicast ID change message to the STA includes: the AP adds an IE to the existing management frame or the control frame or the data frame, and encapsulates the multicast ID change message in the newly added IE. Send to the corresponding STA.
  • the STA receives the existing management frame or control frame or data frame sent by the AP, and obtains the multicast ID change message from the newly received IE in the received management frame or control frame or data frame.
  • the change of the multicast ID may also be initiated by the STA.
  • the method in this embodiment further includes: when the STA needs to change the multicast ID, the STA may send a multicast ID change request to the AP, and then receive the multicast ID change message sent by the AP according to the multicast ID change request.
  • the AP receives the multicast ID change request sent by the STA, and sends the changed multicast ID to the STA according to the multicast ID change request.
  • the multicast ID change request may include a MAC address, an IP address, or other information that can uniquely identify the STA.
  • the AP may re-assign a multicast ID to the STA according to the information carried in the multicast ID change request, and then send the re-assigned multicast ID to the STA as the changed multicast ID.
  • An optional implementation manner in which the STA sends a multicast ID change request to the AP includes: the STA uses the request message, and encapsulates the multicast ID change request in the request message and sends the request to the AP.
  • the request message here can also be a new message.
  • Another optional implementation manner in which the STA sends a multicast ID change request to the AP includes: the STA adds an IE in an existing control frame or a management frame or a data frame, and encapsulates the multicast ID change request in a new one. Sent to the AP in IE.
  • the foregoing embodiments provide various implementation schemes for the STA to receive the multicast ID, the logout multicast ID, and the change multicast ID of the multicast group in which the STA is located, and implement the management of the multicast ID.
  • the STA receives the DTIM beacon frame from the AP, learns the multicast group that will send the multicast information according to the DTIM beacon frame, and then performs multicast according to the multicast group where the STA is located.
  • the ID is in the order of the multicast IDs of all the multicast groups that have multicast information to be sent, and receives the multicast information of the multicast group in the corresponding receiving interval.
  • the AID is used as the multicast ID.
  • the AID as the multicast ID can be specified by the AP, and the STA does not need to The AP negotiates with a strong implementation flexibility.
  • the AID of the multicast ID does not require the multicast information transmission period. It supports both the multicast information that is periodically sent and the multicast information that is randomly sent. More application scenarios; in addition, the AID resources and FMS IDs of the multicast ID are rich, which solves the problem that the multicast application is limited due to the limited number of multicast cycles supported by the FMS ID.
  • An FMS mode has been proposed in the prior art.
  • a STA operating in FMS mode can negotiate with the AP to listen to the period of the DTIM beacon frame, so that it is not necessary to listen to each DTIM beacon frame.
  • the FMS mode can support up to 8 different periods and is identified by an FMS ID of 8 bits, which limits the flexibility of the application in practice.
  • the following embodiments of the present invention provide a multicast identifier sending method and a receiving method, which are used to solve the problem that the multicast application is limited due to the limited number of multicast periods supported by the FSM ID in the prior art.
  • FIG. 8 is a flowchart of a method for sending a multicast identifier according to an embodiment of the present invention.
  • the execution subject of this embodiment is an AP.
  • the method in this embodiment includes:
  • Step 701 Determine a multicast identifier of the multicast group where the STA is located, and map the multicast ID of the multicast group where the STA is located in the AID.
  • Step 702 Send the multicast ID of the multicast group where the STA is located to the STA.
  • An optional implementation manner of the AP determining the multicast ID of the multicast group in which the STA is located includes: The AP maps the multicast ID of the multicast group where the STA is located in an AID.
  • An alternative implementation manner in which the AP determines the multicast ID of the multicast group in which the STA is located includes: The AP maps the multicast ID of the multicast group where the STA is located in at least two AIDs.
  • the AP maps the multicast ID of the multicast group where the STA is located in an AID.
  • Alternative implementations include, but are not limited to, the following:
  • the AP maps the multicast ID of the multicast group where the STA resides to any Page, Block, and/or Sub-block in the AID.
  • the AP maps the multicast ID of the multicast group where the STA is located to the pre-specified Page, Block, and/or Sub-block in the AID.
  • an optional implementation manner in which an AP maps a multicast ID of a multicast group in which the STA is located in at least two AIDs includes, but is not limited to, the following manners:
  • the AP maps the multicast ID of the multicast group where the STA is located in different Pages, Blocks, and/or Sub-blocks of the at least two AIDs.
  • the AP maps the multicast ID of the multicast group where the STA is located in the same at least two AIDs.
  • the AP may actively initiate the allocation of the multicast ID, and the AP may actively send the multicast ID of the multicast group where the STA is located to the corresponding STA.
  • the STA may actively request the multicast ID of the multicast group in which the AP belongs.
  • the method for the AP to send the multicast ID of the multicast group in which the STA is located to the STA includes: receiving the information of the requesting multicast ID sent by the STA, and then sending the STA to the STA according to the information of the requesting multicast ID. Multicast ID of the multicast group.
  • An implementation manner of the AP receiving the information of the requesting multicast ID sent by the STA includes: receiving, by the AP, a request message sent by the STA, where the request message includes information requesting the multicast ID.
  • the request message can be a new message.
  • Another embodiment of the AP receiving the information of the requesting multicast ID sent by the STA includes: receiving, by the AP, an existing control frame or an existing management frame or an existing data frame sent by the STA, the existing control frame or an existing management frame or The newly added IE in the existing data frame includes information requesting the multicast ID.
  • the method for the AP to send the multicast ID of the multicast group in which the STA is located to the STA includes: the AP encapsulates the multicast ID of the multicast group where the STA is located in the newly added management frame or adds The control frame is sent to the STA.
  • the AP sends the multicast ID of the multicast group to which the STA is located to the STA.
  • the AP includes: adding an IE to the existing management frame or the existing control frame or the existing data frame.
  • the multicast ID of the multicast group in which the STA is located is encapsulated in the newly added IE and sent to the STA.
  • the AP sends the multicast ID of the multicast group where the STA is located to the STA.
  • the method further includes: the AP receiving the ACK message sent by the STA. This helps to know in time whether the STA receives the multicast ID of the multicast group it is in. If the STA is required to return an ACK message, if the AP does not receive the ACK message within a certain period of time, the AP needs to resend the multicast ID of the multicast group where the STA is located.
  • the AP may also initiate a logout process of the multicast ID. Based on this, the method in this embodiment further includes: the AP sends a multicast ID deregistration message to the STA, where the multicast ID revocation message includes a logout indication indicating that the multicast ID of the multicast group where the STA is located is logged off.
  • the multicast ID deregistration message may further include a multicast ID that needs to be logged off, that is, a multicast ID of the multicast group where the STA is located.
  • An optional implementation manner in which the AP sends a multicast ID deregistration message to the STA includes: the AP uses a newly added management frame or control frame, and encapsulates the multicast ID deregistration message in a newly added management frame or control frame and sends the message to the STA.
  • Another optional implementation manner in which the AP sends a multicast ID deregistration message to the STA includes: the AP adds an IE to an existing management frame or a control frame or a data frame, and encapsulates the multicast ID deregistration message in the newly added IE. Send to the corresponding STA.
  • the AP may further include: the AP receives the multicast ID cancellation request sent by the STA, and performs the multicast of the STA according to the multicast ID cancellation request.
  • the multicast ID of the group is logged off.
  • the AP may also initiate a change of the multicast ID. Based on this, the method in this embodiment further includes: the AP sends a multicast ID change message to the STA, where the multicast ID change message includes the changed multicast ID of the multicast group where the STA is located.
  • the multicast ID change message may further include a multicast ID that needs to be changed, that is, an original multicast ID of the multicast group where the STA is located.
  • the multicast ID that needs to be changed here is the original multicast ID of the multicast group
  • the changed multicast ID is the new multicast ID used by the multicast group.
  • the method for the AP to send the multicast ID change message to the STA includes: receiving, by the AP, a multicast ID change request sent by the STA, and sending a multicast ID change message to the STA according to the multicast ID change request.
  • An optional implementation manner of the AP sending a multicast ID change message to the STA includes: the AP uses a new management frame or a control frame, and encapsulates the multicast ID change message in a newly added management frame or control frame and sends the message to the STA.
  • Another optional implementation manner in which the AP sends a multicast ID change message to the STA includes: the AP adds an IE to the existing management frame or the control frame or the data frame, and encapsulates the multicast ID change message in the newly added IE. Send to the corresponding STA.
  • the AID is used as the multicast ID of the multicast group, and the AP sends the multicast ID of the multicast group where the STA is located to the STA, so that the STA can learn the multicast of the multicast group.
  • the multicast ID of the group by utilizing the rich features of the AID resources, solves the problem that the multicast application is limited due to the limited number of multicast cycles supported by the FSM ID in the prior art.
  • the AID is used as the multicast ID of the multicast group.
  • the AID as the multicast ID can be specified by the AP, and the STA does not need to negotiate with the AP. Strong implementation flexibility;
  • the AID of the multicast ID does not require the transmission period of the multicast information. It supports both the multicast information that is periodically sent and the multicast information that is sent randomly, and can be applied to more application scenarios.
  • FIG. 9 is a flowchart of a method for receiving a multicast identifier according to an embodiment of the present invention. As shown in FIG. 9, the method in this embodiment includes:
  • Step 801 The STA receives the multicast identifier of the multicast group where the STA is sent by the AP, and the multicast ID of the multicast group where the STA is located is mapped in the AID.
  • Step 802 The STA records the multicast ID of the multicast group where the STA is located.
  • the AP may initiate the allocation of the multicast ID by using the AP, and the STA may receive the multicast identifier of the multicast group where the STA is sent by the AP. Identification ID.
  • the STA may initiate the allocation of the multicast ID by the STA, and the STA receives the multicast identifier ID of the multicast group where the STA is sent by the AP, where the STA sends the information requesting the multicast ID to the AP, and then receives the AP.
  • the multicast ID of the multicast group in which the STA is sent according to the information requesting the multicast ID.
  • An optional implementation manner of the STA sending the information requesting the multicast ID to the AP includes: the STA encapsulates the information of the requested multicast ID in a request message and sends the information to the AP.
  • the request message can be a new message.
  • Another optional implementation manner in which the STA sends the information requesting the multicast ID to the AP includes: An IE is added to the existing control frame or the existing management frame or the existing data frame. The information of the multicast ID is encapsulated in the newly added IE and sent to the AP.
  • An implementation manner of the STA receiving the multicast identifier of the multicast group in which the STA is sent by the AP includes: the STA receives the newly added management frame or the newly added control frame sent by the AP, and the newly added management frame or the newly added control frame includes Multicast ID of the multicast group where the STA is located.
  • Another implementation manner in which the STA receives the multicast identifier ID of the multicast group in which the STA is sent by the STA includes: the STA receives the existing management frame or the existing control frame or the existing data frame sent by the AP, and the existing management frame or the existing management frame
  • the newly added IE in the control frame or the existing data frame includes the multicast ID of the multicast group where the STA is located.
  • the STA after receiving the multicast identifier ID of the multicast group where the STA is sent by the STA, the STA includes: the STA sends an ACK message to the AP.
  • the AP may also initiate a logout process of the multicast ID. Based on this, the method in this embodiment further includes: receiving, by the STA, a multicast ID cancellation message sent by the AP, where the multicast ID multicast message includes a logout indication indicating that the multicast ID of the multicast group where the STA is located is cancelled.
  • the STA may send an ACK message to the AP to notify the AP that the multicast ID deregistration message has been received.
  • An optional implementation manner of the AP sending the multicast ID deregistration message to the STA includes: the AP uses the newly added management frame or the control frame frame, and encapsulates the multicast ID deregistration message in a newly added management frame or control frame and sends the message to the STA. .
  • the STA receives the newly added management frame or control frame sent by the AP, and obtains the multicast ID logout message from the received new management frame or control frame.
  • the process of deregistering the multicast ID may also be initiated by the STA.
  • the method in this embodiment further includes: when the STA needs to be disassociated with the multicast group in which the user is located, the STA sends a multicast ID deregistration request to the AP, so that the AP sets the multicast group where the STA is located according to the multicast ID deregistration request.
  • the multicast ID is logged off, thereby unlinking the multicast group.
  • An optional implementation manner in which the STA sends a multicast ID deregistration request to the AP includes:
  • the STA uses the newly added request message to encapsulate the multicast ID deregistration request in the newly added request message and send it to the AP.
  • Another optional implementation manner in which the STA sends a multicast ID deregistration request to the AP includes: the STA adds an IE in an existing control frame or a management frame or a data frame, and encapsulates the multicast ID deregistration request in a new The IE is sent to the AP.
  • the AP may also initiate a change of the multicast ID.
  • the method of this embodiment further includes: receiving, by the STA, a multicast ID change message sent by the AP, where the multicast ID change message includes the changed multicast ID of the multicast group where the STA is located.
  • the STA learns that the multicast ID needs to be changed according to the multicast ID change message, and determines the changed multicast ID, and then updates the group of the STA according to the changed multicast ID of the multicast group in which the STA includes the multicast ID change message.
  • the multicast ID of the broadcast group is the multicast ID of the broadcast group.
  • the change of the multicast ID may also be initiated by the STA.
  • an embodiment of the STA receiving the multicast ID change message sent by the AP includes: when the STA needs to change the multicast ID, the STA may send a multicast ID change request to the AP, and then receive the AP according to the multicast ID change request. The multicast ID change message sent.
  • An optional implementation manner in which the STA sends a multicast ID change request to the AP includes: the STA uses the request message, and encapsulates the multicast ID change request in the request message and sends the request to the AP.
  • the request message here can also be a new message.
  • Another optional implementation manner in which the STA sends a multicast ID change request to the AP includes: the STA adds an IE in an existing control frame or a management frame or a data frame, and encapsulates the multicast ID change request in a new one. Sent to the AP in IE.
  • the foregoing embodiments provide various implementation manners for the STA to receive the multicast ID of the multicast group, the cancellation of the multicast ID, and the change of the multicast ID, and implement the management of the multicast ID, which has the advantages of being simple and easy to implement.
  • the AID is used as the multicast ID of the multicast group, and the STA receives the multicast ID of the multicast group where the STA is sent by the AP, and then utilizes the feature rich in the AID resource.
  • the problem that the multicast application is limited due to the limited number of multicast cycles supported by the FSM ID in the prior art is solved.
  • the AID is used as the multicast ID of the multicast group. Compared with the scheme of using the FMS ID in the prior art, the AID as the multicast ID can be specified by the AP, and the STA does not need to negotiate with the AP.
  • FIG. 10 is a schematic structural diagram of an AP according to an embodiment of the present invention. As shown in FIG. 10, the AP in this embodiment includes: a first sending module 1001 and a second sending module 1002.
  • the first sending module 1001 is configured to send, to the STA, a DTIM beacon frame, where the DTIM beacon frame is used to indicate a multicast group that has multicast information.
  • the first sending module 1001 is connected to the second sending module 1002, and is configured to provide the second sending module 1002 with the information of the multicast group with multicast information transmission.
  • the second sending module 1002 is configured to send, according to the size sequence of the multicast identifier of the multicast group that has the multicast information, the multicast information of the multicast group that has the multicast information sent in the preset sending interval.
  • the STA receives the multicast information of the multicast group where the STA is located at the receiving interval corresponding to the multicast group where the STA is located.
  • the function modules of the AP provided in this embodiment can be used to perform the process of the multicast information sending method shown in FIG. 1.
  • the specific working principle is not described here. For details, refer to the description of the method embodiment.
  • the AP in this embodiment sends a DTIM beacon frame to the STA, and the multicast group that has the multicast information sent through the DTIM beacon frame, and then follows the order of the multicast IDs of the multicast group that has the multicast information.
  • the multicast information of the multicast groups is sent in the sending interval, so that the STA can receive the multicast information of the multicast group in the receiving interval according to the multicast ID of the multicast group.
  • the multicast information of other multicast groups solves the problem that the STA needs to receive all the multicast information after receiving the beacon frame after receiving the beacon frame in the prior art, which is beneficial to alleviating the waste of resources of the STA, and is particularly applicable. For STAs with low energy requirements.
  • FIG. 11 is a schematic structural diagram of an AP according to another embodiment of the present invention. The embodiment is implemented based on the embodiment shown in FIG. 10. As shown in FIG. 11, the AP in this embodiment also includes a first sending module 1001 and a second sending module 1002. In addition, the AP in this embodiment further includes: The third sending module 1003.
  • the third sending module 1003 is configured to send, to the STA, the multicast ID of the multicast group where the STA is located before the first sending module 1001 sends the DTIM beacon frame to the STA.
  • the third sending module 1003 is connected to the first sending module 1001.
  • the AP in this embodiment further includes: a mapping module 1004.
  • the mapping module 1004 is connected to the third sending module 1003, and is configured to: before the third sending module 1003 sends the multicast ID of the multicast group where the STA is located to the STA, the multicast ID of the multicast group where the STA is located. Mapped in the AID.
  • the mapping module 1004 is configured to map the multicast ID of the multicast group where the STA is located in an AID.
  • the mapping module 1004 is specifically configured to map the multicast ID of the multicast group where the STA is located in any page, block, and/or sub-block of the AID.
  • the broadcast ID is mapped in pre-specified pages, blocks and/or sub-blocks in the AID.
  • the mapping module 1004 is further configured to map the multicast ID of the multicast group where the STA is located in at least two AIDs.
  • the mapping module 1004 is specifically configured to map the multicast ID of the multicast group where the STA is located in different pages, blocks, and/or sub-blocks of the at least two AIDs.
  • the multicast ID is mapped in the same page, block and/or sub-block in at least two AIDs.
  • the manner in which the DTIM beacon frame is used to indicate the multicast group with multicast information transmission is: using a partial virtual bitmap in the DTIM beacon frame to indicate that the multicast information is sent. Multicast group.
  • the third sending module 1003 is specifically configured to encapsulate the multicast ID of the multicast group where the STA is located in a management frame or a control frame and send the message to the STA.
  • the third sending module 1003 is configured to add an IE to the existing management frame, the existing control frame, or the existing data frame, and encapsulate the multicast ID of the multicast group in the new IE to the STA.
  • the AP in this embodiment further includes: a first receiving module 1005.
  • the first receiving module 1005 is configured to receive information about the requested multicast ID sent by the STA.
  • the third sending module 1003 is specifically configured to send, according to the information of the requesting multicast ID received by the first receiving module 1005, the multicast ID of the multicast group where the STA is located.
  • the first receiving module 1005 is connected to the third sending module 1003, and configured to provide the third sending module 1003 with information requesting the multicast ID.
  • the first receiving module 1005 is specifically configured to receive a request message sent by the STA, where the request message includes the information about the multicast ID requested. Or
  • the first receiving module 1005 is specifically configured to receive an existing control frame or an existing management frame or an existing data frame sent by the STA, where the existing IE included in the existing control frame or the existing management frame or the existing data frame includes the foregoing Request information for the multicast ID.
  • the AP in this embodiment further includes: a second receiving module 1006.
  • the second receiving module 1006 is configured to receive an acknowledgement message sent by the STA.
  • the second receiving module 1006 is connected to the third sending module 1003, and is configured to: after the third sending module 1003 sends the multicast ID of the multicast group where the STA is located, to the STA, the acknowledgment message sent by the STA is received.
  • the AP in this embodiment further includes: a fourth sending module 1007.
  • the fourth sending module 1007 is configured to send a multicast ID change message to the STA after the third sending module 1003 sends the multicast ID of the multicast group where the STA is located to the STA, where the multicast ID change message includes the group where the STA is located. The changed multicast ID of the broadcast group.
  • the fourth transmitting module 1007 is connected to the third transmitting module 1003.
  • the AP in this embodiment further includes: a third receiving module 1008.
  • the third receiving module 1008 is configured to receive a multicast ID change request sent by the STA.
  • the fourth sending module 1007 is specifically configured to send the multicast ID change message to the STA according to the multicast ID change request received by the third receiving module 1008.
  • the fourth sending module 1007 is connected to the third receiving module 1008.
  • the AP in this embodiment further includes: a fifth sending module 1009.
  • the fifth sending module 1009 is configured to send a multicast ID deregistration message to the STA after the third sending module 1003 sends the multicast ID of the multicast group where the STA is located to the STA, where the multicast ID multicast message includes an indication that the The logout indication of the multicast ID of the multicast group where the STA is located.
  • the fifth sending module 1009 is connected to the third sending module 1003.
  • the AP in this embodiment further includes: a fourth receiving module 1010 and a first logout module 1011.
  • the fourth receiving module 1010 is configured to: after the third sending module 1003 sends the multicast ID of the multicast group where the STA is located to the STA, receive the multicast ID cancellation request sent by the STA.
  • the fourth receiving module 1010 is connected to the third sending module 1003.
  • the first logout module 1011 is connected to the fourth receiving module 1010, and is configured to cancel the multicast ID of the multicast group where the STA is located according to the multicast ID deregistration request received by the fourth receiving module 1010.
  • the function modules of the AP provided in this embodiment can be used to perform the corresponding processes in the method for sending multicast information provided by the foregoing embodiments.
  • the specific working principle is not described here. For details, refer to the description of the method examples.
  • the AP in this embodiment sends a DTIM beacon frame to the STA and passes the DTIM beacon.
  • a multicast group with multicast information is sent to the multicast group.
  • the multicast information of these multicast groups is sent in sequence.
  • the multicast information of the multicast group in the multicast group of the multicast group is received in the corresponding receiving interval, and the multicast information of the multicast group is not received, and the STA is received in the prior art.
  • the problem of all multicast information after receiving the beacon frame is beneficial to alleviate the waste of the STA caused by the STA.
  • FIG. 12 is a schematic structural diagram of an AP according to another embodiment of the present invention. As shown in FIG. 12, the AP of this embodiment includes: a memory 1201 and a transmitter 1202.
  • the memory 1201 is configured to store multicast information of a multicast group that has multicast information transmission.
  • the sender 1202 is connected to the memory 1201, and configured to send a DTIM beacon frame to the STA, and send the memory in the preset sending interval according to the order of the multicast identifier ID of the multicast group that is sent by the multicast information.
  • the multicast information of the multicast group that is sent by the multicast information is stored in the 1201, so that the STA receives the multicast information of the multicast group where the STA is located in the receiving interval corresponding to the multicast group where the STA is located; where the DTIM beacon is A frame is used to indicate a multicast group with multicast information.
  • the AP provided in this embodiment can be used to perform the corresponding process in the method for sending multicast information provided by the foregoing embodiment.
  • the specific working principle is not described here. For details, refer to the description of the method example.
  • the AP in this embodiment sends a DTIM beacon frame to the STA, and the multicast group that has the multicast information sent through the DTIM beacon frame, and then follows the order of the multicast IDs of the multicast group that has the multicast information.
  • the multicast information of the multicast groups is sent in the sending interval, so that the STA can receive the multicast information of the multicast group in the receiving interval according to the multicast ID of the multicast group.
  • the multicast information of the other multicast groups solves the problem that the STAs need to receive all the multicast information after receiving the beacon frame after receiving the beacon frame in the prior art, which is beneficial to alleviating the waste of the STA caused by the STA.
  • FIG. 13 is a schematic structural diagram of a STA according to an embodiment of the present invention. As shown in FIG. 13, the STA of this embodiment includes: a fifth receiving module 1301 and a sixth receiving module 1302.
  • the fifth receiving module 1301 is configured to receive a DTIM beacon frame sent by the AP, where the DTIM beacon frame is used to indicate a multicast group that has multicast information sent.
  • the sixth receiving module 1302 is connected to the fifth receiving module 1301, and is configured to receive the DTIM beacon received by the fifth receiving module 1301 according to the multicast identifier ID of the multicast group where the STA is located according to the embodiment.
  • the multicast information of the multicast group in the STA where the STA is sent by the AP is received in the receiving interval corresponding to the multicast group where the STA is located.
  • each of the receiving intervals is an average transmission duration or a beacon frame interval of the multicast information.
  • the multicast ID of each multicast group that has multicast information is
  • the manner in which the DTIM beacon frame is used to indicate the multicast group with multicast information is: Use a partial virtual bitmap in the DTIM beacon frame to indicate the multicast with multicast information transmission. group.
  • the STA of this embodiment further includes: a seventh receiving module 1303.
  • the seventh receiving module 1303 is configured to receive, before the fifth receiving module 1301 receives the DTIM beacon frame, the multicast ID of the multicast group in which the STA of the embodiment is sent by the AP.
  • the seventh receiving module 1303 is specifically configured to receive a management frame or a control frame that is sent by the AP, where the management frame or the control frame includes the multicast ID of the multicast group where the STA is located in this embodiment.
  • the management frame or control frame here can be added.
  • the seventh receiving module 1303 is configured to receive an existing management frame or an existing control frame or an existing data frame sent by the AP, where the existing management frame or the existing IE or the existing IE includes the original IE.
  • the STA of this embodiment further includes: a sixth sending module 1304.
  • the sixth sending module 1304 is configured to send information requesting the multicast ID to the AP.
  • the seventh receiving module 1303 is specifically configured to receive the multicast ID of the multicast group in which the STA is located according to the information of the requesting multicast ID sent by the sixth sending module 1304.
  • the seventh receiving module 1303 is connected to the sixth sending module 1304, and configured to: after the sixth sending module 1304 sends the information requesting the multicast ID, receive the multicast ID of the multicast group where the STA of the embodiment is located sent by the AP.
  • the sixth sending module 1304 is specifically configured to encapsulate the information requesting the multicast ID in a request message and send the information to the AP.
  • the sixth sending module 1304 is specifically configured to add an IE to an existing control frame or an existing management frame or an existing data frame, and encapsulate the information requesting the multicast ID in a newly added IE and send the information to the AP.
  • the STA of this embodiment further includes: a seventh sending module 1305.
  • the seventh sending module 1305 is configured to send an acknowledgement message to the AP after the seventh receiving module 1303 receives the multicast ID of the multicast group where the STA is located in this embodiment.
  • the seventh sending module 1305 is connected to the seventh receiving module 1303.
  • the STA of this embodiment further includes: an eighth receiving module 1306 and a first updating module 1307.
  • the eighth receiving module 1306 is configured to receive the multicast ID change message sent by the AP after receiving the multicast ID of the multicast group in which the STA of the embodiment is sent by the AP, and the multicast ID change message includes the local The changed multicast ID of the multicast group where the STA is located.
  • the eighth receiving module 1306 is connected to the seventh receiving module 1303.
  • the first update module 1307 is connected to the eighth receiving module 1306, and is configured to update the changed multicast ID of the multicast group in which the STA of the embodiment is located according to the multicast ID change message received by the eighth receiving module 1306.
  • the multicast ID of the multicast group where the STA is located is connected to the eighth receiving module 1306, and is configured to update the changed multicast ID of the multicast group in which the STA of the embodiment is located according to the multicast ID change message received by the eighth receiving module 1306. The multicast ID of the multicast group where the STA is located.
  • the STA of this embodiment further includes: an eighth sending module 1308.
  • the eighth sending module 1308 is configured to send a multicast ID change request to the AP.
  • the eighth receiving module 1306 is specifically configured to receive a multicast ID change message sent by the AP according to the multicast ID change request.
  • the eighth receiving module 1306 is connected to the eighth sending module 1308, and is configured to receive, after the eighth sending module 1308 sends the multicast ID change request, the multicast ID change message sent by the AP.
  • the STA of this embodiment further includes: a ninth receiving module 1309.
  • the ninth receiving module 1309 is configured to: after receiving, by the seventh receiving module 1303, the multicast ID of the multicast group in which the STA of the embodiment is sent by the AP, receiving the multicast ID cancellation message sent by the AP, where the multicast ID multicast message includes Indicates a logout indication that the multicast ID of the multicast group in which the STA is located in this embodiment is logged off.
  • the ninth receiving module 1309 is connected to the seventh receiving module 1303.
  • the STA of this embodiment further includes: a ninth sending module 1310.
  • the ninth sending module 1310 is configured to send a multicast ID deregistration request to the AP after the seventh receiving module 1303 receives the multicast ID of the multicast group in which the STA of the embodiment is sent by the AP, so that the AP cancels the request according to the multicast ID.
  • the multicast ID of the multicast group where the STA is located in this embodiment is logged out.
  • the ninth sending module 1310 is connected to the seventh receiving module 1303.
  • the function modules of the STA provided in this embodiment are used to perform the corresponding processes in the method for receiving multicast information provided by the foregoing embodiments. The specific working principle is not described here. For details, refer to the description of the method embodiments.
  • the STA in this embodiment cooperates with the AP provided in the foregoing embodiment to receive a DTIM beacon frame sent by the AP, and obtains a multicast group that has multicast information according to the indication of the DTIM beacon frame, and then according to the multicast group in which the multicast group is located.
  • the multicast ID is in the order of the multicast IDs of the multicast group with the multicast information sent, and receives the multicast information sent by the AP in the receiving interval corresponding to the multicast group in which it is located, without receiving other groups.
  • the multicast information of the broadcast group solves the problem that the STA needs to receive all the multicast information after receiving the beacon frame after receiving the beacon frame in the prior art, which is beneficial to alleviating the waste of the STA caused by the STA.
  • FIG. 15 is a schematic structural diagram of a STA according to another embodiment of the present invention. As shown in FIG. 15, the STA of this embodiment includes: a receiver 1501 and a memory 1502.
  • the receiver 1501 is configured to receive a DTIM beacon frame sent by the AP, and according to the size sequence of the multicast ID of the multicast group in which the STA is located in the multicast ID of the multicast group that has the multicast information, according to the embodiment, In the receiving interval corresponding to the multicast group in which the STA is located, the multicast information of the multicast group in the STA of the embodiment is sent by the AP.
  • the DTIM beacon frame is used to indicate the multicast group with the multicast information.
  • the memory 1502 is connected to the receiver 1501 and configured to store the multicast information of the multicast group in which the STA of the embodiment is received by the receiver 1501.
  • the STAs provided in this embodiment can be used to perform the corresponding processes in the method for receiving multicast information provided by the foregoing embodiments.
  • the specific working principles are not described here. For details, refer to the description of the method embodiments.
  • the STA in this embodiment cooperates with the AP provided in the foregoing embodiment to receive a DTIM beacon frame sent by the AP, and obtains a multicast group that has multicast information according to the indication of the DTIM beacon frame, and then according to the multicast group in which the multicast group is located.
  • the multicast ID is in the order of the multicast IDs of the multicast group with the multicast information sent, and receives the multicast information sent by the AP in the receiving interval corresponding to the multicast group in which it is located, without receiving other groups.
  • the multicast information of the broadcast group solves the problem that the STA needs to receive all the multicast information after receiving the beacon frame after receiving the beacon frame in the prior art, which is beneficial to alleviating the waste of the STA caused by the STA.
  • FIG. 16 is a schematic structural diagram of an AP according to another embodiment of the present invention.
  • the AP of this embodiment includes: a determining module 1601 and a tenth sending module 1602.
  • the determining module 1601 is configured to determine a multicast identifier ID of the multicast group where the STA is located, and the multicast ID of the multicast group where the STA is located is mapped in the AID.
  • the tenth sending module 1602 is connected to the determining module 1601, and is configured to send, to the STA, the multicast ID of the multicast group where the STA determined by the determining module 1601 is located.
  • the determining module 1601 is specifically configured to map the multicast ID of the multicast group where the STA is located in any page, block, or sub-block of the AID.
  • the determining module 1601 is specifically configured to map the multicast ID of the multicast group in which the STA is located in any page, block, and/or sub-block of the AID; or the determining module 1601 is specifically configured to use the group of the multicast group where the STA is located.
  • the broadcast ID is mapped in pre-specified pages, blocks, and/or sub-blocks in the AID. Or
  • the determining module 1601 is specifically configured to map the multicast ID of the multicast group where the STA is located to the block and the sub-block in the at least two AIDs.
  • the determining module 1601 is specifically configured to map the multicast ID of the multicast group where the STA is located in different pages, blocks, and/or sub-blocks of the at least two AIDs.
  • the multicast ID is mapped in the same page, block and/or sub-block in at least two AIDs.
  • the tenth sending module 1602 is specifically configured to encapsulate the multicast ID of the multicast group where the STA is located in a management frame or a control frame and send the message to the STA.
  • the control frame or management frame here can be added.
  • the tenth sending module 1602 is specifically configured to add an IE to the management frame or the control frame or the data frame, and encapsulate the multicast ID of the multicast group in which the STA is located in the newly added IE and send the IE to the STA.
  • the management frame, control frame or data frame here may be existing.
  • the AP in this embodiment further includes: a tenth receiving module 1603.
  • the tenth receiving module 1603 is configured to receive information about the requested multicast ID sent by the STA. Based on this, the tenth sending module 1602 is specifically configured to send, according to the information of the requesting multicast ID received by the tenth receiving module 1603, the multicast ID of the multicast group where the STA is located.
  • the tenth sending module 1602 is further connected to the tenth receiving module 1603.
  • the tenth receiving module 1603 is specifically configured to receive a request message sent by the STA, where the request message includes information for requesting a multicast ID.
  • the tenth receiving module 1603 is specifically configured to receive an existing control frame or an existing management frame or an existing data frame sent by the STA, where the existing control frame or the existing management frame or the newly added cell IE in the existing data frame is used. Includes information requesting a multicast ID.
  • the AP in this embodiment further includes: an eleventh receiving module 1604.
  • the eleventh receiving module 1604 is configured to: after the tenth sending module 1602 sends the multicast ID of the multicast group where the STA is located to the STA, receive the acknowledgement message sent by the STA.
  • the eleventh receiving module 1604 is connected to the tenth sending module 1602.
  • the AP in this embodiment further includes: an eleventh sending module 1605.
  • the eleventh sending module 1605 is configured to send a multicast ID change message to the STA after the tenth sending module 1602 sends the multicast ID of the multicast group where the STA is located to the STA, where the multicast ID change message includes the multicast of the STA.
  • the changed multicast ID of the group is connected to the tenth transmission module 1602.
  • the AP in this embodiment further includes: a twelfth receiving module 1606.
  • the twelfth receiving module 1606 is configured to receive a multicast ID change request sent by the STA. Based on this, the eleventh sending module 1605 is specifically configured to send a multicast ID change message to the STA according to the multicast ID change request received by the twelfth receiving module 1606.
  • the eleventh transmission module 1605 is connected to the twelfth receiving module 1606.
  • the AP in this embodiment further includes: a twelfth sending module 1607.
  • the twelfth sending module 1607 is configured to: after the tenth sending module 1602 sends the multicast ID of the multicast group where the STA is located to the STA, send a multicast ID deregistration message to the STA, where the multicast ID multicast message includes the indication that the STA is to be sent The logout indication of the multicast ID of the multicast group.
  • the twelfth sending module 1607 is connected to the tenth sending module 1602.
  • the AP in this embodiment further includes: a thirteenth receiving module 1608 and a second logout module 1609.
  • the thirteenth receiving module 1608 is configured to receive the multicast ID cancellation request sent by the STA after the tenth sending module 1602 sends the multicast ID of the multicast group where the STA is located to the STA.
  • the thirteenth receiving module 1608 is connected to the tenth sending module 1602.
  • the second logout module 1609 is connected to the thirteenth receiving module 1608, and is configured to cancel the multicast ID of the multicast group where the STA is located according to the multicast ID deregistration request received by the thirteenth receiving module 1608.
  • the function modules of the AP provided in this embodiment may be used to perform the corresponding process in the method for sending a multicast identifier provided by the foregoing embodiment.
  • the specific working principle is not described here. For details, refer to the description of the method embodiment.
  • the AP provided in this embodiment sends the multicast ID of the multicast group in which the STA is located to the STA by using the AID as the multicast ID of the multicast group, so that the STA can learn the multicast ID of the multicast group in which the STA is located.
  • the resource-rich features solve the problem of limited multicast applications in the prior art due to the limited number of multicast cycles supported by the FSM ID.
  • the AP provided in this embodiment uses the AID as the multicast ID of the multicast group, and can directly specify the AID as the multicast ID. It does not need to negotiate with the STA, and has strong implementation flexibility.
  • FIG. 18 is a schematic structural diagram of an AP according to another embodiment of the present invention. As shown in FIG. 18, the AP in this embodiment includes: a processor 1801 and a transmitter 1802.
  • the processor 1801 is configured to determine a multicast identifier of the multicast group where the STA is located, and the multicast ID of the multicast group where the STA is located is mapped in the AID.
  • the transmitter 1802 is connected to the processor 1801 and configured to send the multicast ID of the multicast group where the STA determined by the processor 1801 is located to the STA.
  • the AP provided in this embodiment can be used to perform the corresponding process in the method for sending a multicast identifier provided by the foregoing embodiment.
  • the specific working principle is not described here. For details, refer to the description of the method embodiment.
  • the AP provided in this embodiment sends the multicast ID of the multicast group in which the STA is located to the STA by using the AID as the multicast ID of the multicast group, so that the STA can learn the multicast ID of the multicast group in which the STA is located.
  • the resource-rich features solve the problem of limited multicast applications in the prior art due to the limited number of multicast cycles supported by the FSM ID.
  • the AP provided in this embodiment uses the AID as the multicast ID of the multicast group, and can directly specify the AID as the multicast ID. It does not need to negotiate with the STA, and has strong implementation flexibility.
  • FIG. 19 is a schematic structural diagram of a STA according to another embodiment of the present invention. As shown in FIG. 19, the STA of this embodiment includes: a fourteenth receiving module 1901 and a storage module 1902.
  • the fourteenth receiving module 1901 is configured to receive the multicast identifier of the multicast group where the STA is located in the embodiment, and the multicast ID of the multicast group where the STA is located is mapped in the AID.
  • the storage module 1902 is connected to the fourteenth receiving module 1901, and is configured to record the multicast ID of the multicast group in which the STA of the embodiment is received by the fourteenth receiving module 1901.
  • the fourteenth receiving module 1901 is specifically configured to receive a management frame or a control frame that is sent by the AP, where the management frame or the control frame includes the multicast ID of the multicast group where the STA is located in this embodiment.
  • the management or control frame here can be added.
  • the fourteenth receiving module 1901 is specifically configured to receive an existing management frame or an existing control sent by the AP.
  • the frame or the existing data frame, the newly added IE in the existing management frame or the existing control frame or the existing data frame includes the multicast ID of the multicast group where the STA of the embodiment is located.
  • the STA of this embodiment further includes: a thirteenth sending module 1903.
  • the thirteenth sending module 1903 is configured to send, to the AP, information requesting the multicast ID.
  • the fourteenth receiving module 1901 is specifically configured to receive the multicast ID of the multicast group in which the STA is located according to the information of the requesting multicast ID.
  • the thirteenth sending module 1903 is connected to the fourteenth receiving module 1901.
  • the thirteenth sending module 1903 is specifically configured to encapsulate the information requesting the multicast ID into the request message and send the information to the AP.
  • the thirteenth sending module 1903 is specifically configured to encapsulate the information requesting the multicast ID into the request message and send the information to the AP.
  • the thirteenth sending module 1903 is specifically configured to add an IE to the existing control frame or the existing management frame or the existing data frame, and encapsulate the information of the requesting multicast ID in the newly added IE and send the information to the AP.
  • the STA of this embodiment further includes: a fourteenth sending module 1904.
  • the fourteenth sending module 1904 is configured to send an acknowledgement message to the AP after receiving the multicast identifier ID of the multicast group where the STA is located in the fourteenth receiving module 1901.
  • the fourteenth sending module 1904 is connected to the fourteenth receiving module 1901.
  • the STA of this embodiment further includes: a fifteenth receiving module 1905 and a second updating module 1906.
  • the fifteenth receiving module 1905 is configured to receive, after receiving the multicast identifier ID of the multicast group where the STA is located in the embodiment, the multicast ID change message sent by the AP, where the multicast ID change message includes the local The changed multicast ID of the multicast group where the STA is located.
  • the fifteenth receiving module 1905 is connected to the fourteenth receiving module 1901.
  • the second update module 1906 is connected to the fifteenth receiving module 1905, and is configured to update, according to the changed multicast ID of the multicast group where the STA of the embodiment is located, according to the multicast ID change message received by the fifteenth receiving module 1905.
  • the STA of this embodiment further includes: a fifteenth sending module 1907.
  • the fifteenth sending module 1907 is configured to send a multicast ID change request to the AP.
  • the fifteenth receiving module 1905 is specifically configured to receive a multicast ID change message sent by the AP according to the multicast ID change request.
  • the fifteenth transmitting module 1907 is connected to the fifteenth receiving module 1905.
  • the STA of this embodiment further includes: Six receiving module 1908.
  • the 16th receiving module 1908 is configured to receive, after receiving the multicast identifier ID of the multicast group where the STA is located in the embodiment, the multicast ID cancellation message sent by the AP, where the multicast ID multicast message includes Indicates a logout indication that the multicast ID of the multicast group in which the STA is located in this embodiment is logged off.
  • the sixteenth receiving module 1908 is connected to the fourteenth receiving module 1901.
  • the STA of this embodiment further includes: a sixteenth sending module 1909.
  • the 16th sending module 1909 is configured to send a multicast ID deregistration request to the AP after the 14th receiving module 1901 receives the multicast ID of the multicast group where the STA is located in the embodiment, so that the AP cancels the request according to the multicast ID.
  • the multicast ID of the multicast group where the STA is located in this embodiment is logged out.
  • the sixteenth sending module 1909 is connected to the fourteenth receiving module 1901.
  • the function modules of the STA provided in this embodiment can be used to perform the corresponding processes in the multicast identifier receiving method provided in the foregoing embodiment.
  • the specific working principle is not described here. For details, refer to the description of the method embodiment.
  • the STA provided in this embodiment cooperates with the AP provided in the foregoing embodiment, and uses the AID as the multicast ID of the multicast group to receive the multicast ID of the multicast group in which the AP sends the multicast group. To some extent, the problem of limited multicast applications caused by the limited number of multicast cycles supported by the FSM ID in the prior art is solved. In addition, the STA provided in this embodiment uses the AID as the multicast ID of the multicast group, and does not need to negotiate with the AP, which has strong implementation flexibility.
  • FIG. 21 is a schematic structural diagram of a STA according to another embodiment of the present invention. As shown in FIG. 21, the STA of this embodiment includes: a receiver 2101 and a memory 2102.
  • the receiver 2101 is configured to receive the multicast identifier of the multicast group in the STA where the STA is sent by the AP.
  • the multicast ID of the multicast group where the STA is located is mapped in the AID.
  • the memory 2102 is connected to the receiver 2101 and configured to record the multicast ID of the multicast group in which the STA of the embodiment is received by the receiver 2101.
  • the STA provided in this embodiment can be used to perform the corresponding process in the method for receiving the multicast identifier provided by the foregoing embodiment.
  • the specific working principle is not described here. For details, refer to the description of the method embodiment.
  • the STA provided in this embodiment cooperates with the AP provided in the foregoing embodiment, and uses the AID as the multicast ID of the multicast group to receive the multicast ID of the multicast group in which the AP sends the multicast group. , to some extent solved the prior art due to FSM ID The limited number of supported multicast cycles causes the problem of limited multicast applications.
  • the STA provided in this embodiment uses the AID as the multicast ID of the multicast group, and does not need to negotiate with the AP, which has strong implementation flexibility.
  • the aforementioned program can be stored in a computer readable storage medium.
  • the program when executed, performs the steps including the above method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

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