WO2014131300A1 - 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 PDFInfo
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- WO2014131300A1 WO2014131300A1 PCT/CN2013/088706 CN2013088706W WO2014131300A1 WO 2014131300 A1 WO2014131300 A1 WO 2014131300A1 CN 2013088706 W CN2013088706 W CN 2013088706W WO 2014131300 A1 WO2014131300 A1 WO 2014131300A1
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is leader and terminal is follower
- H04W52/0216—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is leader and terminal is follower using a pre-established activity schedule, e.g. traffic indication frame
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is leader and terminal is follower
- H04W52/0219—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is leader and terminal is follower where the power saving management affects multiple terminals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/30—Resource management for broadcast services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/11—Allocation or use of connection identifiers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/40—Connection management for selective distribution or broadcast
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/002—Transmission of channel access control information
- H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
- H04W84/12—WLAN [Wireless Local Area Networks]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Definitions
- the present invention relates to communication technologies, and in particular, to a multicast information transmission method and device. Background technique
- STA sensor stations
- 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.
- Companies can send information to these water, electricity, and gas meters in the same or different cycles through wireless access points (Access Point, called AP), or update these water, electricity, and gas meters as needed.
- AP wireless access Point
- 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) that contains a Delivery Traffic Indication Map (DTIM).
- DTIM Delivery Traffic Indication Map
- DTIM Delivery Traffic Indication Map
- 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.
- the embodiment of the invention provides a method and a device for transmitting multicast information, which are used to alleviate the waste of resources of the STA.
- a first aspect of the embodiments of the present invention provides a method for transmitting multicast information, including: an access point AP sends a multicast group association identifier MID to a station STA, where one multicast group has one or more MIDs, each of which The MID corresponds to a multicast group and a receiving period of STAs in the multicast group;
- a transmit transmission indication mapping DTIM beacon frame to the STA, where the DTIM beacon frame includes the MID, and is used to indicate a multicast group that has multicast information sent to the STA;
- the AP sends the multicast information of the multicast group, where the multicast information carries information about the MID or the associated MID, and the multicast information is received by the STA.
- the method before the sending, by the AP, the MID of the multicast group to the STA, the method includes: receiving an information frame of the request MID sent by the STA, where sending the MID of the multicast group to the station STA includes: receiving The information frame of the requested MID is sent to the STA, and the MID of the multicast group where the STA is located is sent.
- the information frame requesting the MID includes the MID request, and the AP sends the MID of the multicast group to the STA according to the MID request information unit before the AP sends the MID of the multicast group to the STA.
- a second aspect of the embodiments of the present invention provides another method for transmitting multicast information, where the method includes: an AP sending a MID of a multicast group to a station STA, where each MID corresponds to a multicast group and the multicast group. The receiving period of the STA in the middle;
- a DTIM beacon frame Transmitting, by the AP, a DTIM beacon frame to the STA, where a part of the virtual bitmap of the DTIM beacon frame includes MID indication information for one or more pages, and corresponding to the same multicast group in different pages Different MIDs, the different MIDs corresponding to the same receiving period of the STAs in the multicast group; the APs transmitting multicast information of the multicast group, where the multicast information carries the MID information or an association The MID information is received by the STA.
- the method before the sending, by the AP, the MID of the multicast group to the station STA, the method includes: receiving an information frame of the request MID sent by the STA, and sending the MID of the multicast group to the STA of the station The method includes: sending, according to the received information frame of the request MID, the MID of the multicast group where the STA is located to the STA.
- the information frame requesting the MID includes an MID request information unit; and before the AP sends the MID of the multicast group to the station STA, the AP generates the multicast to the STA according to the MID request information unit.
- the MID of the group includes: receiving an information frame of the request MID sent by the STA, and sending the MID of the multicast group to the STA of the station The method includes: sending, according to the received information frame of the request MID, the MID of the multicast group where the STA is located to the STA.
- the information frame requesting the MID includes an MID request information unit
- an embodiment of the present invention further provides an embodiment of an access point that implements the foregoing method, where the access point includes:
- a processor configured to generate a multicast group association identifier MID and send a transmission indication map DTIM beacon frame;
- a transmitting circuit configured to send, by using an antenna, the multicast group association identifier MID, the transmission transmission indication mapping DTIM beacon frame, and multicast information of the multicast group;
- One of the multicast groups has one or more MIDs, and each of the MIDs corresponds to a multicast group and a receiving period of STAs in the multicast group.
- the DTIM beacon frame is used to indicate that there is multicast information to the STA.
- the multicast group that is sent; the multicast information carries the MID or information associated with the MID, and the multicast information is received by the STA.
- a method for receiving multicast group information includes: the station STA receives a multicast group association identifier MID sent by an access point AP, where one multicast group has one or more MIDs, and each The MID corresponds to a multicast group and a receiving period of the STA in the multicast group; the STA receives a transmit transmission indication mapping DTIM beacon frame sent by the AP, where the DTIM beacon frame includes the The MID is used to indicate the multicast group that has the multicast information sent to the STA; the STA receives the multicast information of the multicast group sent by the AP, where the multicast information carries the MID or Associate the information of the MID.
- a method for receiving multicast group information comprising: receiving, by a station, a multicast group MID sent by an AP, where each of the MIDs corresponds to a multicast group and a receiving period of a STA in the multicast group;
- a DTIM beacon frame sent by the AP where a part of the virtual bitmap of the DTIM beacon frame includes MID indication information for one or more pages, and corresponding to the same multicast in different pages Different MIDs of the group, where the different MIDs correspond to the same receiving period of the STAs in the multicast group;
- the STA Receiving, by the STA, the multicast information of the multicast group sent by the AP, the multicast information carrying the MID information or the information associated with the MID, where the multicast information is used by the STA receive.
- the access point includes:
- a processor configured to generate a MID and a DTIM beacon frame of the multicast group, and a transmitting circuit, configured to send, by using an antenna, the multicast group association identifier MID, the transmission transmission indication map, a DTIM beacon frame, and a multicast group Multicast information; each of the MIDs corresponds to a multicast group and a receiving period of STAs in the multicast group; and a part of the virtual bitmap of the DTIM beacon frame includes MID indication information for one or more pages, Having different MIDs corresponding to the same multicast group in different pages, where the different MIDs correspond to the same receiving period of the STAs in the multicast group; the multicast information carries the MID information or the associated Information of the MID, the multicast information is received by the STA.
- an embodiment of the present invention further has a STA, including:
- the receiving circuit receives, by the antenna, the multicast group association identifier MID sent by the AP, the transmission transmission indication map DTIM, and the multicast information of the multicast group; wherein one multicast group has one or more MIDs, and each of the MIDs corresponds to one a multicast group and a receiving period of the STA in the multicast group, the DTIM beacon frame includes the MID, and is used to indicate a multicast group that has multicast information sent to the STA; The MID and DTIM cause the receiving circuit to receive multicast information of the multicast group.
- the STA of another station includes: a receiving circuit, which receives, by using an antenna, a multicast group association identifier MID sent by the AP, and a transmission indication mapping DTIM and multicast information of the multicast group;
- Each of the MIDs corresponds to a multicast group and a receiving period of STAs in the multicast group;
- the partial virtual bitmap of the DTIM beacon frame includes MID indication information for one or more pages, on different pages. Having different MIDs corresponding to the same multicast group, the different MIDs corresponding to the same receiving period of the STAs in the multicast group, and a processor, configured to, according to the MID and the DTIM, the receiving circuit to receive the Multicast information of a multicast group.
- the multicast information sending and receiving method and device provided by the embodiment of the present invention, by using a DTIM beacon frame to indicate a multicast group with multicast information, and the AP multicasting according to the multicast group with multicast information.
- the size sequence of the medium receives the multicast information of the multicast group in the corresponding receiving interval, and solves the problem of all the multicast information after the STAs receive the beacon frame in the prior art, thereby alleviating the waste of resources of the STA. .
- the multicast identity sending and receiving method and the device provided by the embodiment of the present invention use the AID as the multicast MID of the multicast group, and the AP sends the multicast MID of the multicast group where the STA is located to the STA, which solves the problem to a certain extent.
- the number of multicast cycles supported by the FSM ID is limited, which causes the multicast application to be limited.
- 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 sending multicast information according to another 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. 2 is a flowchart of a method for transmitting multicast information according to another embodiment of the present invention
- Schematic diagram of the structure of the AID
- 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 block diagram of an access point AP according to an embodiment of the present invention.
- FIG. 11 is a schematic block diagram of an access point AP according to another embodiment of the present invention.
- FIG. 12 is a schematic block diagram of a station STA according to an embodiment 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 the STA, where the DTIM beacon frame is used to indicate a multicast group with multicast information.
- Step 102 Send the multicast information of the multicast group with the multicast information sent in the preset sending interval, 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 group with the multicast information transmission is sent in each preset sending interval.
- the multicast information of the broadcast group the order of the multicast IDs may be in descending order, or from small to large.
- the order of the multicast IDs to be sent by the AP is the same as the order of the multicast IDs that the STAs receive when they are received, either in descending order or in descending order.
- each multicast group has a multicast ID, which is used to uniquely identify the multicast group.
- These multicast IDs are associated identifiers AIDs used to identify multicast groups, and are called MIDs (Multicast AIDs).
- 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, where the type indication bit in the beacon frame indicates that the beacon frame is a DTIM beacon frame, the DTIM message.
- the standard frame indicates on the one hand that the DTIM beacon frame will transmit multicast information, and on the other hand, indicates that there is a multicast group for multicast information transmission.
- the AP sends the multicast information of the multicast groups in sequence according to the size of the MID of the multicast group that has the multicast information, so that the STA can correspond to the MID of the multicast group in which the multicast group belongs.
- the multicast information of the multicast group in the receiving group is received in the receiving interval, and the multicast information of other multicast groups is not received, which solves the problem that all STAs need to receive the beacon frame after receiving the beacon frame in the prior art.
- the problem of information is beneficial to alleviate the waste of resources caused by STAs, especially for STAs with low energy consumption requirements.
- the method may further include sending, to the STA, a multicast ID of the multicast group where the STA is located.
- the AP sends the multicast ID of the multicast group of the STA to the STA before sending the multicast information of the multicast group to the STA according to the order of the multicast IDs of the multicast groups that are sent by the multicast information.
- the STA obtains 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 its own multicast group locally.
- the MID that identifies a multicast group is not unique. In practice, multiple MIDs may be allowed to identify the same multicast group. Therefore, another method for transmitting multicast information provided by another embodiment of the present invention is shown in FIG. 2b as a flowchart of the method.
- the execution subject of this embodiment is an AP, but is not limited thereto. As shown in FIG. 2b, the method in this embodiment includes:
- the access point AP sends a multicast group association identifier MID to the station STA, where one multicast group has one or more MIDs, and each of the MIDs corresponds to one multicast group and a receiving period of STAs in the multicast group. ;
- the AP sends a transmit transmission indication mapping DTIM beacon frame to the STA, where the DTIM beacon frame includes the MID, and is used to indicate that the multicast information is sent to the STA by the multicast group.
- the AP sends the multicast information of the multicast group, where the multicast information carries the MID or information associated with the MID, and the multicast information is received by the STA.
- the different MIDs corresponding to the same multicast group correspond to different periods for receiving multicast information
- the information associated with the MID may be the MAC address of the multicast group.
- the MID indicates that the multicast group has multicast information sent to the STA to wake up the STA to receive the multicast information.
- the access point AP may send the multicast group association identifier MID to all or part of the STAs.
- the STAs that belong to a multicast group may need to wake up to receive multicast information in different periods.
- the period of receiving multicast information may also be referred to as a multicast listen interval.
- STA-1 and STA 2 belong to multicast group A, but the period in which STA-1 and STA-2 need to receive multicast information is different.
- STA-1 can receive multicast information in each DTIM wake-up, while STA-2 wakes up every 2 DTIMs. Therefore, assign MID-1 to STA-1 and MID-2 to STA-2.
- STA-1 receives a packet in which DTIM finds MID-1, it receives the packet.
- STA-2 receives data when it receives data in the DTIM indicating that MID-2 has data.
- MID-1 and MID-2 correspond to multicast group A.
- the preset sending interval may be an average sending duration of the multicast information.
- the AP allocates a length of multicast information to each multicast group that has multicast information in the order of the MID of the multicast group that has the multicast information.
- the average transmission time is used as the transmission interval, and the multicast information of the corresponding multicast group is transmitted in the allocated transmission interval, so that the multicast information of the multicast group is sequentially transmitted according to the order 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. Transmitting multicast information of the multicast group after the current DTIM beacon frame and the TIM beacon frame between the current DTIM beacon frame and the next DTIM beacon frame, or transmitting within the beacon frame interval of the current DTIM beacon frame information.
- the AP may indicate in the DTIM beacon frame all MIDs that need to receive multicast information before the next DTIM beacon frame.
- Partial Virtual Bitmaps in existing DTIM beacon frames are only STAs that indicate unicast data. When MID is used to identify multicast groups, some virtual bitmaps in DTIM beacon frames can also be used. Indicates a multicast group with multicast information.
- the DTIM contains information indicating the page, block, and sub-block to which the STA having the unicast information belongs, after the MID identifies the multicast group, the DTIM can also use the information to indicate the multicast with the multicast information. The page, block, and sub-block where the group is located.
- 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 equal to the number of multicast groups with multicast information, the AP may send a multicast after each TIM beacon frame. Group multicast information, but is not limited to this.
- the AP can simultaneously send multicast information of at least two multicast groups after one of the TIM beacon frames or the current DTIM beacon frame to ensure that the multicast information of each multicast group is Can be successfully sent to the STA.
- the AP sends the MID of the multicast group where the STA is located before sending the multicast information of the multicast group to the STA according to the order of the MIDs of the multicast groups that are sent by the multicast information.
- the STA is configured to enable the STA to know the MID of the multicast group in the multicast group.
- the multicast information of the multicast group in the multicast group is received according to the MID of the multicast group.
- the STA stores the received MID of the multicast group it is in locally.
- the AP may actively initiate the allocation of the multicast ID, that is, the AP sends the multicast MID of the multicast group where the STA is located to the STA.
- the STA may actively request the MID of the multicast group in which the STA is located.
- An embodiment of the step 101 includes: the AP receives the information of the request MID sent by the STA, and the AP sends the MID of the multicast group where the STA is located to the STA according to the information of the received request MID.
- the information of the request MID sent by the STA may be a multicast media access control (Media Access Control) (MAC) address or other information that can uniquely identify the multicast group to which the STA belongs.
- the AP identifies the multicast group where the STA is located according to the request MID information sent by the STA, and then determines the MID of the multicast group where the STA is located.
- the AP may allocate the MID to the STA in real time, or directly obtain the pre-assigned multicast ID.
- a specific implementation manner in which the STA sends the information requesting the MID to the AP is: the STA encapsulates the information of the request MID in the request message and sends the information to the AP.
- the specific manner of receiving the information of the request MID 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 request from the request message. Multicast ID information.
- the request message may be a new message.
- a specific new request message may be a request message called a MID Request.
- information frame 1 shown as: information frame 1 version information
- MID request MID Request IE may contain less in the MID Request: version information, MID request (MID Request) And MID Request IE (Information Element, called IE).
- the version information is used to indicate that the message belongs to a standard version information, and is a non-essential information field.
- the MID request is used to indicate that the information is MID Request information, which is an information frame requesting MID.
- the MID Request IE carries the specific requested information.
- the MID Request IE is as follows, the information frame 2 is shown as: Information Frame 2
- Multicast MAC address 1 Multicast MAC address 2
- the MID request information element may include an ID of the IE, a length of the IE, a MAC address of a multicast group that wishes to obtain the MID, and a multicast listen interval that is desired to receive the multicast group data.
- the MAC address of the multicast group that wants to obtain the MID and the period in which it wants to receive the multicast group data may be allowed to be multiple. That is, one STA is allowed to request the MID of multiple multicast groups in one request message.
- the MAC address of the multicast group is required, and the AP allocates the MID according to the MAC address of the multicast group, and other information fields are optional.
- the STA adds a cell unit (IE) in the existing control frame or the existing management frame or the existing data frame.
- the information of the request MID is encapsulated in a new IE and sent to the AP.
- a specific new IE is the MID Request IE or the information carried in the MID Request IE is included in the existing AID Request IE.
- the newly added IE is placed in an existing message frame, and the newly added IE may be placed in an Association Request or a Reassociation Request or an AID Switch Request. in.
- the specific manner of receiving the information of the request MID 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 or the existing
- the newly added IE in the data frame includes the information of the requested multicast ID, and the AP obtains the information of the requested MID from an existing IE or an existing IE or an existing IE in the existing data frame.
- 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.
- a specific new message frame can be called MID The message frame of the Response (MID reply), which is the MID of the multicast group sent by the access point AP to the station STA.
- the MID information frame can be regarded as the MID Response because the MID is sent after the STA requests. Referring to the following specific embodiment, an MID information frame, information frame 3: information frame 3
- the fields that IE can include in MID Response are: version information, MID reply, and MID Response IE.
- the version information is used to indicate that the message belongs to a certain version of the version information, and the part of the bit is not required, for example, may be pre-negotiated by default or by a system setting.
- the MID reply is used to indicate that the information is an information frame of the MID Response.
- information frame 4 information frame 4
- the information that the MID Response IE can contain: the ID of the IE, the length of the IE, the multicast MAC address, the MID corresponding to the allocated MID, the multicast listen interval allowed to receive the multicast information, the MID effective time, and the status information. . If the STA requests the MID of multiple multicast groups, the multicast MAC address in the IE, the MID corresponding to the allocated MID, the multicast listen interval allowed for receiving multicast information, the MID effective time, and the status information part may be Multiple.
- the MID request information unit in the application includes: a MAC address of the multicast group or a period in which the STA receives the multicast information of the multicast group is necessary, because the AP receives the group according to the MAC address of the multicast group or the STA.
- the MID of the multicast group is allocated periodically.
- the MID corresponding to the corresponding multicast MAC address allocation may be one or more MIDs, or may be composed of a page indicating bitmap combined with the MID.
- the page indicates that the bitmap identifies one or more pages to which the current MID is to be assigned.
- the page here corresponds to the page in the TIM structure.
- the AP may allocate the MID dispersed in the plurality of pages according to the period in which the STA is to receive the multicast information, so that the partial virtual bitmap in a DITM only indicates that the STA receives the data in one page. The situation, in order to meet the need for STAs to receive multicast information in different periods.
- another method for transmitting multicast information according to an embodiment of the present invention includes
- S2301 The AP sends the MID of the multicast group to the STA of the station, where each MID corresponds to one multicast group and a receiving period of the STA in the multicast group.
- the AP sends a DTIM beacon frame to the STA, where a part of the virtual bitmap of the DTIM beacon frame includes MID indication information for one or more pages, and the same page is included in different pages.
- a part of the virtual bitmap of the DTIM beacon frame includes MID indication information for one or more pages, and the same page is included in different pages.
- Different MIDs of the broadcast group where the different MIDs correspond to the same receiving period of the STAs in the multicast group;
- the AP sends the multicast information of the multicast group, where the multicast information carries the MID information or information associated with the MID, and the multicast information is received by the STA.
- An example is as follows: When a partial virtual bitmap in DTIM indicates only one page and all four pages of the loop are looped according to the order of 1, 2, 3, 4, if STA-1 needs to receive each DTIM, and STA— 2 It needs to be received every other DTIM period, then it needs to allocate 4 MIDs to STA-1.
- the 4 MIDs are mapped in 4 pages respectively, so that it can know whether there is data reception in each DTIM.
- By assigning 2 MIDs to STA-2 the two MIDs are mapped in pages 1 and 3, respectively, to ensure that STA-2 can receive multicast information in the desired receiving period.
- the page of the MID mapping can be different depending on the order in which the TIM bitmap indicates the loop of the page in DTIM.
- MIDs corresponding to the same multicast group in the same cycle can be mapped to the same block and sub-block of different pages.
- the MID effective time means that the specified MID is effective immediately or after a period of time, where the period of time may be several Beacon Intervals, or several Beacons containing TIMs, or several include DITM Beacon.
- the AP allocates the MID of the multicast group in which the STA is located to the STA.
- 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.
- a specific new IE is the MID Response IE or the information in the MID Response IE is included in the existing AID Response IE.
- Another specific method of including new IEs into existing message frames Add new IEs in Association Response or Reassociation Response and AID Switch Response.
- 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 sends 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 logout 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 logout 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 the multicast ID.
- 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. On the premise that 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 in which the AP sends a multicast ID deregistration message to the STA includes: the AP encapsulates the multicast ID deregistration message in a newly added management frame or a newly added control by using a newly added management frame or a newly added control frame. The 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.
- 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 deregistration request sent by the STA includes: the AP receiving an existing control frame or a management frame or a data frame sent by the STA, and new 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. 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 an original multicast ID of the multicast group where the STA is located. For a multicast group, the original multicast ID of the multicast group is the multicast ID to be changed, and the new multicast ID used by the multicast group is the changed multicast.
- the STA receives the multicast ID change message sent by the AP to learn that the multicast ID needs to be changed and determines the changed multicast ID.
- the STA may send an ACK message to the AP. If the AP does not receive the ACK message within a certain period of time, 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 newly added control frame to encapsulate the MID change message in the newly added management frame or the newly added control frame. Sent to the STA.
- a specific implementation method is that the AP can use MID Response to complete the MID change.
- 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.
- a specific new IE is the MID Response IE or the information in the MID Response IE is included in the existing AID Response IE.
- a specific one will add IE
- the method included in the existing message frame is to add a new IE in the Association Response or Reassociation Response and or the AID Switch Response.
- 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 of the STA sending the 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.
- a specific new request message may be to use MID Request to complete the MID change.
- Another optional implementation manner in which the STA sends a multicast ID change request to the AP includes: the STA adds an IE to the existing control frame or the management frame or the data frame, and encapsulates the multicast ID change request in the new The IE is sent to the AP.
- the specific implementation manner of the AP receiving the multicast ID change request sent by the STA includes: the AP receiving an existing control frame or a management frame or a data frame sent by the STA, and new from the existing control frame or the management frame or the data frame.
- the multicast ID change request is obtained in the added IE.
- a specific new m is the MID Request IE or the information contained in the MID Request IE is included in the existing AID Request IE.
- a specific method of including a new IE into an existing message frame is to add an association request in an Association Request and a Reassociation Request and or an AID Switch Request. 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 advantage that the single-chip is 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 (Association ID, called AID).
- the AID here may be an AID other than the unicast AID in the AID space. 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 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 may map the multicast ID of the multicast group where the STA is located in an AID.
- 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 pages (in English), blocks (blocks in English), and sub-blocks (sub-blocks in English).
- Figure 3 shows the structure of an AID that supports four Pages.
- an AID structure that supports four Pages there can be 32 Blocks in a Page, and 8 Sub-blocks in a Block, and a Sub-block can support 8 STAs.
- 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 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 or Sub-block. Where multiple multicasts The multicast ID of the group 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 to 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 these 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, and 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. It supports both the multicast information that is periodically sent and the multicast information that is randomly sent. It can be applied to more applications.
- the AID resource and the FMS ID 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.
- 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 to send.
- a part of the virtual bitmap is used to indicate that the STA corresponding to the AID needs to receive the downlink data in the unicast case.
- the AID is used as the multicast ID, so in the multicast situation.
- the multicast group that has been sent by the multicast message may be indicated by a part of the virtual bitmap that already exists in the beacon frame.
- the beacon frame identifies the multicast by using the AID corresponding to the multicast ID in the partial virtual bitmap for identifying the unicast data. group. For example, if the bit corresponding to an AID in a part of the 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 group that has the multicast information.
- Multicast information and the STA receives the multicast information of its own multicast group at the corresponding receiving interval according to the multicast ID of the multicast group in which the multicast group is located in the multicast ID of the multicast group that has multicast information.
- 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 with the multicast information.
- 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.
- the AP first sends a beacon frame to the STA, where the type indication bit in the beacon frame indicates that the beacon frame is a DTIM beacon frame, and the DTIM is passed through the DTIM.
- the beacon frame informs the STA on the one hand that the multicast information will be sent after the DTIM beacon frame, and on the other hand informs the STA which multicast group or groups of multicast packets 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 sequentially transmitted at each transmission interval 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 to determine the order of the multicast ID of the multicast group in which the multicast group is located in the multicast ID of the multicast group that has the multicast information sent by the DTIM beacon frame.
- the receiving interval corresponding to the multicast group is determined, and then the multicast information of the multicast group in the multicast group is received in the corresponding receiving interval, and the multicast information of other multicast groups is not received, thereby solving the existing In the technology, after receiving 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 Based on the sequence of the multicast ID of the multicast group in which the STA is located, the STA receives the STAs sent by the AP in the receiving interval corresponding to the multicast group where 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.
- the STAs in the three multicast groups receive the corresponding multicast information is as shown in FIG. 5 .
- 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.
- the STAs in the second multicast group are waiting for one multicast.
- the average transmission time of the information wakes up and receives the multicast information of its own (ie, the multicast information of the second multicast group); the STAs in the third multicast group wake up and receive the broadcast after waiting for the average transmission duration of the two multicast information. Own multicast information (that is, multicast information of the third multicast group).
- the average length of time that the STA waits for one multicast message may be one more waiting 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 2 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 refers to 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. 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 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 actively 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 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 to the AP. ID information, and then the STA receives the multicast ID of the multicast group in which the STA is located 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 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 requested multicast ID 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.
- An optional implementation manner in which the STA sends 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 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 to 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 new 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 receives the group of the STA sent by the AP. After the multicast ID of the group is broadcast, an ACK message can be sent to the AP. In this way, the AP can know in time whether the STA receives the multicast ID of the multicast group where the STA is located. In the case that 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 deregistration 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 where the STA is located. Logout instruction for ID logout.
- the method in this embodiment further includes: the STA receives the multicast ID deregistration 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 logout 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 or data frame sent by the AP, and obtains the 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 deregistration 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 deregistration request to the AP, so that the AP is configured according to the group.
- 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 a multicast ID of the multicast group where the STA is located, that is, a 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 timely know that the AP receives the multicast ID deregistration request. Conducive to 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 encapsulates the multicast ID deregistration request in the newly added request message and sends the request to the AP by using the newly added request 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 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 of the changed multicast group.
- 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.
- the new multicast ID of the multicast group refers to the changed multicast ID.
- the method of this embodiment further includes: receiving, by the STA, a multicast ID change message sent by the AP, to learn that the multicast ID needs to be changed, and determining the changed multicast ID.
- the STA updates the multicast ID of the multicast group where the STA is located according to the changed multicast ID of the multicast group in which the STA is included in the multicast ID change message.
- 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 its 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 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 received existing management frame or the newly added IE in the control frame or the data frame.
- the change of the multicast ID may also be initiated by the STA.
- the method of 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 a multicast ID change message sent by the AP according to the multicast ID change request. Accordingly, the AP receives the multicast ID change request sent by the STA, and transmits 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 manners 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, which has the advantages of easy implementation. .
- 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 embodiment of the present invention further provides another method for receiving multicast information, where the method includes:
- the station STA receives the multicast group association identifier MID sent by the access point AP, where one multicast group has one or more MIDs, and each of the MIDs corresponds to one multicast group and the STA in the multicast group. Receiving cycle
- the STA receives a transmit transmission indication mapping DTIM beacon frame sent by the AP, where the DTIM beacon frame includes the MID, and is used to indicate that the multicast information is sent to the STA by the multicast group.
- the STA receives multicast information of the multicast group sent by the AP, where the group The broadcast information carries the MID or information associated with the MID.
- the STA sends an information frame requesting the MID to the AP, and the information frame of the MID is requested for the AP to generate the MID.
- the information requesting the MID includes a MID request and a MID request information unit, wherein the MID request is used to indicate that the information frame is used for a MID request, and the MID request information unit is used by the AP to generate the sending to the STA MID of the multicast group.
- the MID request information unit includes: a MAC address of the multicast group, a MAC address of the multicast group is used by the AP to allocate the MID; or a MAC address of the multicast group and the STA receives the multicast
- the period of the group multicast information, the MAC address of the multicast group, and the period in which the STA receives the multicast information of the multicast group are used by the AP to allocate the MID.
- the STA requests the information unit to carry the information in the MID request information unit by using the STA's association identifier AID.
- the embodiment of the present invention further provides a method for receiving multicast group information, including: a station STA receives a multicast group MID sent by an AP, and each of the MIDs corresponds to one multicast group and a receiving period of STAs in the multicast group. ;
- a DTIM beacon frame sent by the AP where a part of the virtual bitmap of the DTIM beacon frame includes MID indication information for one or more pages, and corresponding to the same multicast in different pages Different MIDs of the group, where the different MIDs correspond to the same receiving period of the STAs in the multicast group;
- the STA Receiving, by the STA, the multicast information of the multicast group sent by the AP, the multicast information carrying the MID information or the information associated with the MID, where the multicast information is used by the STA receive.
- 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 performs the negotiation and has strong implementation flexibility.
- the AID as 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; Furthermore, 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. STAs working in FMS mode, can be The AP negotiates to listen to the period of the DTIM beacon frame so that there is no need to listen to every DTIM beacon frame.
- the FMS mode can support up to 8 different periods and is identified by an FMS ID of 8 bits in length, 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 executive body of this embodiment is an AP. As shown in FIG. 8, the method in this embodiment includes:
- Step 701 Determine a multicast identification ID 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.
- an optional implementation manner in which an AP maps a multicast ID of a multicast group in which the STA is located in an AID includes, but is not limited to, the following:
- the AP maps the multicast ID of the multicast group in which 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.
- the AP maps the multicast ID of the multicast group where the STA is located in at least two AIDs, including but not limited to the following:
- 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 is located.
- the method for the AP to send the multicast ID of the multicast group where the STA is located to the STA includes: receiving the STA Sending the information of the requesting multicast ID, and then sending the multicast ID of the multicast group where the STA is located to the STA according to the information of the requesting multicast ID.
- 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 may 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 further includes: the AP receives 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. In the case that 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 of the STA to the STA.
- 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 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.
- 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.
- 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 the multicast ID change message to the STA includes: the AP uses the newly added management frame or 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 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 by utilizing the rich feature of the AID resource.
- 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 multicast information transmission period. It supports both the multicast information that is periodically sent and the multicast information that is sent randomly. It can be applied to more applications. Scenes.
- FIG. 9 is a flowchart of a method for receiving a multicast identifier according to an embodiment of the present invention. As shown in Figure 9, The method of 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 multicast ID assignment by using the AP, and the STA may receive the multicast identifier of the multicast group where the STA is sent by the STA. 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 STA, 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 in which the STA sends 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: the STA adds an IE in the existing control frame or the existing management frame or the existing data frame, and encapsulates the information requesting the multicast ID in the STA.
- the new IE is 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 receives the multicast identifier of the multicast group where the STA is sent by the AP.
- the ID is followed by: 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 logged off.
- the STA may send an ACK message to the AP to notify the AP. A multicast ID logout 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 from the multicast group in which the UE 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 encapsulates the multicast ID deregistration request in the newly added request message and sends the request to the AP by using the newly added request 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 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 a multicast ID change message sent by the AP.
- 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, 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, which has the advantages of easy implementation. .
- 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 of 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 as the multicast ID does not require the transmission period of the multicast information, and supports both the multicast information that is periodically sent and the multicast information that is randomly sent, and can be applied to more applications. Scenes.
- FIG. 10 is a schematic block diagram of an access point AP according to an embodiment of the present invention.
- the access point 900 of FIG. 10 includes at least a processor 901, a memory 902, and a transmitting circuit 905.
- the processor 901, the memory 902, and the receiving circuit 903 are connected by a bus system 904.
- the access point 900 may further include a receiving circuit 903 and an antenna 906.
- the processor 901 controls the access point 900.
- the processor 901 may also be referred to as a central processing unit (CPU).
- Memory 902 can include read only memory and random access memory and provides instructions and data to processor 901.
- a portion of memory 902 may also include non-volatile random access memory (NVRAM).
- NVRAM non-volatile random access memory
- receive circuitry 903 and transmit circuitry 905 can be coupled to antenna 906.
- the various components of access point 900 are coupled together by a bus system 904, which may include, in addition to the data bus, a power bus, a control bus, a status signal bus, and the like. However, for clarity of description, various buses are labeled as bus system 904 in the figure.
- the method disclosed in the foregoing embodiment of the present invention may be applied to the processor 901 or by the processor.
- the processor 901 is implemented with various functional circuits or devices.
- the processor 901 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the foregoing method may be completed by an integrated logic circuit of hardware in the processor 901 or an instruction in a form of software.
- the processor 901 described above may be a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, a discrete gate or a transistor logic device, Discrete hardware components.
- DSP digital signal processor
- ASIC application specific integrated circuit
- FPGA off-the-shelf programmable gate array
- the methods, steps, and logic blocks of the disclosure of the embodiments of the invention may be implemented or controlled.
- the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
- the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware decoding processor, or may be performed by a combination of hardware and software modules in the decoding processor.
- the software modules can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
- the storage medium is located in the memory 902, and the processor 901 reads the information in the memory 902 and completes the steps of the above method in combination with the hardware thereof.
- the processor 901 is configured to generate a multicast group association identifier MID and a transmission transmission indication map DTIM beacon frame.
- the transmitting circuit 905 sends the multicast group association identifier MID, the transmission transmission indication map DTIM beacon frame, and the multicast information of the multicast group through the antenna;
- One of the multicast groups has one or more MIDs, and each of the MIDs corresponds to a multicast group and a receiving period of STAs in the multicast group; the DTIM beacon frame includes the MID, and is used to indicate that there is a multicast.
- the MID indicates that the multicast information is sent to the STA by the multicast group to wake up the STA to receive the multicast information.
- the further receiving circuit 903 is configured to receive, by using the antenna, an information frame of the request MID sent by the STA; and the processor generates the multicast group associated identifier MID according to the information frame of the request MID.
- the information of the request MID includes a MID request and an MID request information unit, where the MID request is used to indicate that the information frame is used for the MID request, and the MID request information unit includes: the MAC of the multicast group Address: the processor 905 assigns the MID to the MAC address of the multicast group.
- the processor 905 carries the information in the MID request information unit through the AID request information unit of the STA.
- the MID includes an MID reply information and an MID reply information unit, where the MID reply information indicates that the information frame is an MID reply frame, and the reply information unit carries the MID information of the multicast group to which the STA belongs, and further responds to the information unit carrying the information.
- the MAC address of the multicast group the length of the period during which multicast information is allowed to be received, and when the MID is valid.
- the information of the MID reply information unit of the processor 905 is carried by the reply information unit of the associated identifier of the AP.
- FIG. 11 is a schematic block diagram of an access point AP according to another embodiment of the present invention.
- the access point 1000 of Figure 11 includes at least a processor 1001, a memory 1002, and a transmit circuit 1005.
- the processor 1001, the memory 1002, and the receiving circuit 1003 are connected by a bus system 1004.
- the access point 1000 may further include a receiving circuit 1003, an antenna 1006, and the like.
- the processor 1001 controls the access point 1000.
- the processor 1001 may also be referred to as a central processing unit (CPU).
- Memory 1002 can include read only memory and random access memory and provides instructions and data to processor 1001.
- a portion of memory 1002 may also include non-volatile random access memory (NVRAM).
- NVRAM non-volatile random access memory
- receiving circuit 1003 and transmitting circuit 1005 can be coupled to antenna 1006.
- the various components of the access point 1000 are coupled together by a bus system 1004, which may include, in addition to the data bus, a power bus, a control bus, a status signal bus, and the like. However, for clarity of description, various buses are labeled as bus system 1004 in the figure.
- the method disclosed in the foregoing embodiments of the present invention may be applied to the processor 1001 or implemented by the processor 1001 in conjunction with various functional circuits or devices.
- the processor 1001 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method may be completed by an integrated logic circuit of hardware in the processor 1001 or an instruction in a form of software.
- the processor 1001 described above may be a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware. Component.
- DSP digital signal processor
- ASIC application specific integrated circuit
- FPGA off-the-shelf programmable gate array
- the methods, steps, and logic blocks of the disclosure of the embodiments of the invention may be implemented or controlled.
- the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
- the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware decoding processor, or may be performed by a combination of hardware and software modules in the decoding processor.
- the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
- the storage medium is located in the memory 1002.
- the processor 1001 reads the information in the memory 1002 and combines the hardware to complete the steps of the above method.
- the access point is implemented by the processor 1001, and the processor 1001 is configured to generate a multicast group MID and a DTIM beacon frame.
- the transmitting circuit 1005 is configured to send the multicast group association identifier MID and the antenna through the antenna 1006. Transmitting a transmission indication mapping a DTIM beacon frame and multicast information of a multicast group; wherein each of the MIDs corresponds to a multicast group and a receiving period of STAs in the multicast group; and a partial virtual bit of the DTIM beacon frame
- the figure includes MID indication information for one or more pages, and different MIDs corresponding to the same multicast group are included in different pages, and the different MIDs correspond to the same receiving period of STAs in the multicast group;
- the multicast information carries the MID information or information associated with the MID, and the multicast information is received by the STA.
- the receiving circuit 1003 is configured to receive, by using the antenna, an information frame of the request MID sent by the STA, where the processor
- the information of the request MID includes a MID request and a MID request information element, where
- the MID request is used to indicate that the information frame is used for the MID request, and the MID request information unit includes: a MAC address of the multicast group, and the processor 1001 assigns the MID to the MAC address of the multicast group.
- the processor 905 carries the information in the MID request information element by the AID request information element of the STA.
- the MID includes an MID reply information and an MID reply information unit, where the MID reply information indicates that the information frame is an MID reply frame, and the reply information unit carries the MID information of the multicast group to which the STA belongs, and further responds to the information unit carrying the information.
- the information of the MID reply information unit of the processor 905 is carried by the reply information unit of the associated identifier of the AP.
- the access point AP of the embodiment of the present invention can implement the steps or functions of the foregoing method embodiments.
- the access point AP completes the multicast information sending method according to the specific process of the foregoing method embodiment. Therefore, the method in the above method embodiment can be completely implemented by an access point.
- FIG. 12 is a schematic block diagram of a point STA in accordance with an embodiment of the present invention.
- the site 1200 of FIG. 12 includes at least a processor 1201, a memory 1202, and a transmitting circuit 1205.
- the processor 1201, the memory 1202, and the receiving circuit 1203 are connected by a bus system 1204.
- the station 1200 may further include a receiving circuit 1203, an antenna 1206, and the like.
- the processor 1001 controls the access point 1200.
- the processor 1201 may also be referred to as a central processing unit (CPU).
- Memory 1202 can include read only memory and random access memory and provides instructions and data to processor 1201.
- a portion of the memory 1202 may also include a non- Volatile Random Access Memory (NVRAM).
- receive circuitry 1203 and transmit circuitry 1205 can be coupled to antenna 1206.
- the various components of the access point 1200 are coupled together by a bus system 1204, which may include, in addition to the data bus, a power bus, a control bus, a status signal bus, and the like. However, for clarity of description, various buses are labeled as bus system 1204 in the figure.
- the method disclosed in the foregoing embodiments of the present invention may be applied to the processor 1201 or implemented by the processor 1201 in conjunction with various functional circuits or devices.
- the processor 1201 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the foregoing method may be completed by an integrated logic circuit of hardware in the processor 1201 or an instruction in a form of software.
- the processor 1201 described above may be a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware. Component.
- DSP digital signal processor
- ASIC application specific integrated circuit
- FPGA off-the-shelf programmable gate array
- the methods, steps, and logic blocks of the disclosure of the embodiments of the invention may be implemented or controlled.
- the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
- the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware decoding processor, or may be performed by a combination of hardware and software modules in the decoding processor.
- the software modules can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
- the storage medium is located in the memory 1202.
- the processor 1201 reads the information in the memory 1202 and completes the steps of the above method in combination with hardware.
- the station includes: a receiving circuit 1203, configured to receive, by using an antenna, a multicast group association identifier MID sent by an AP, a transmission indication indication mapping DTIM, and multicast information of a multicast group; wherein one multicast group has one or more The MID, each of the MIDs corresponds to a multicast group and a receiving period of the STAs in the multicast group, and the DTIM beacon frame includes the MID, and is used to indicate a group that has multicast information sent to the STA.
- the processor 1021 is configured to wake up the STA according to the MID and the DTIM, so that the receiving circuit receives the multicast information of the multicast group.
- the STA further comprising: a transmitting circuit 1025, configured to send, by using an antenna, an information frame that sends a request MID, where the request MID The information frame is used by the AP to generate the MID.
- the site includes:
- the receiving circuit receives, by the antenna, the multicast group association identifier MID sent by the AP, the transmission transmission indication mapping DTIM, and the multicast information of the multicast group;
- Each of the MIDs corresponds to a multicast group and a receiving period of STAs in the multicast group;
- the partial virtual bitmap of the DTIM beacon frame includes MID indication information for one or more pages, on different pages. Having different MIDs corresponding to the same multicast group, the different MIDs corresponding to the same receiving period of the STAs in the multicast group, and a processor, configured to, according to the MID and the DTIM, the receiving circuit to receive the Multicast information of a multicast group.
- the manner in which the STA receives the MID and the DTIM in this embodiment is different from the previous implementation.
- the multicast identity sending and receiving method and the device provided by the embodiment of the present invention use the MID as the multicast ID of the multicast group, and the AP sends the multicast MID of the multicast group where the STA is located to the STA, which solves the problem to a certain extent.
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Abstract
Description
Claims
Priority Applications (5)
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| RU2015141698A RU2635888C2 (ru) | 2013-03-01 | 2013-12-06 | Способ и устройство передачи многоадресной информации |
| KR1020157026751A KR20150120526A (ko) | 2013-03-01 | 2013-12-06 | 멀티캐스트 정보 전송 방법 및 장치 |
| EP13876114.3A EP2955942B1 (en) | 2013-03-01 | 2013-12-06 | Multicast information transmission method and device |
| US14/836,682 US20150365885A1 (en) | 2013-03-01 | 2015-08-26 | Multicast information transmission method and device |
| US15/698,563 US20170374609A1 (en) | 2013-03-01 | 2017-09-07 | Multicast information transmission method and device |
Applications Claiming Priority (4)
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| CN201310066677.0 | 2013-03-01 | ||
| CN201310066677 | 2013-03-01 | ||
| CN201310069902.6A CN104023316B (zh) | 2013-03-01 | 2013-03-05 | 组播信息传输方法及设备 |
| CN201310069902.6 | 2013-03-05 |
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| US14/836,682 Continuation US20150365885A1 (en) | 2013-03-01 | 2015-08-26 | Multicast information transmission method and device |
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| US (2) | US20150365885A1 (zh) |
| EP (1) | EP2955942B1 (zh) |
| KR (1) | KR20150120526A (zh) |
| CN (1) | CN104023316B (zh) |
| RU (1) | RU2635888C2 (zh) |
| WO (1) | WO2014131300A1 (zh) |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN104023316B (zh) | 2017-11-17 |
| RU2015141698A (ru) | 2017-04-06 |
| RU2635888C2 (ru) | 2017-11-16 |
| KR20150120526A (ko) | 2015-10-27 |
| EP2955942A4 (en) | 2016-01-06 |
| US20150365885A1 (en) | 2015-12-17 |
| US20170374609A1 (en) | 2017-12-28 |
| EP2955942B1 (en) | 2020-02-05 |
| EP2955942A1 (en) | 2015-12-16 |
| CN104023316A (zh) | 2014-09-03 |
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