WO2015164998A1 - Appareil et procédé d'agrégation de trames et d'analyse de trames - Google Patents

Appareil et procédé d'agrégation de trames et d'analyse de trames Download PDF

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Publication number
WO2015164998A1
WO2015164998A1 PCT/CN2014/076339 CN2014076339W WO2015164998A1 WO 2015164998 A1 WO2015164998 A1 WO 2015164998A1 CN 2014076339 W CN2014076339 W CN 2014076339W WO 2015164998 A1 WO2015164998 A1 WO 2015164998A1
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WIPO (PCT)
Prior art keywords
aid
receiving end
msdu
bit
different target
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PCT/CN2014/076339
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English (en)
Chinese (zh)
Inventor
赵牧
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2014/076339 priority Critical patent/WO2015164998A1/fr
Priority to CN201480076890.2A priority patent/CN106068661B/zh
Publication of WO2015164998A1 publication Critical patent/WO2015164998A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to an apparatus and method for frame aggregation and frame parsing.
  • the Media Access Control Unit is a frame structure of a Media Access Control (MAC).
  • An MSDU adds a destination address, a source address, an MSDU length, and a padding.
  • a subframe of an aggregated medium access control layer service data unit (Aggregate MSDU, A-MSDU), a plurality of A-MSDU subframes are aggregated to obtain an A-MSDU, and the A-MSDU adds a frame header and a loop check
  • the bit is encapsulated into a Medium Access Control Layer Protocol Data Unit (MPDU).
  • MPDU Medium Access Control Layer Protocol Data Unit
  • the source station sends the MPDU obtained by the above A-MSDU encapsulation to the target work station.
  • the address field of the receiving end carries only the MAC address of a target work station. Therefore, the A- in the MPDU
  • the MSDU of the same target work station can only be aggregated in the MSDU.
  • the MSDU of different target work stations cannot be aggregated.
  • the frame aggregation technology of the A-MSDU is limited. Summary of the invention
  • an embodiment of the present invention provides an apparatus and method for frame aggregation and frame parsing, which generates a receiving end address field of an AID structure, and aggregates multiple MSDUs sent to different target workstations into one.
  • the A-MSDU is encapsulated into MPDUs and sent to different target stations.
  • a first aspect of the embodiments of the present invention provides a device for frame aggregation, which is applied to a workstation at a transmitting end, where the device includes:
  • An aggregation module configured to aggregate multiple media access control layer service data units MSDUs sent to different target work stations into one aggregated medium access control layer service data unit A-MSDU;
  • a first generating module configured to use a common identifier AID according to the different target work stations
  • the attribute generation uses the receiving end address field of the AID structure, and the AID structure includes the AID of the different target work stations;
  • a second generating module configured to use the A-MSDU as a load, and generate, by using the AID structure as a receiving end address domain, a media access control layer protocol data unit MPDU;
  • a sending module configured to send the MPDU, so that the receiving end station parses the received receiving end address field of the MPDU, when the AID structure of the receiving end address field includes the AID of the receiving end working station And the receiving end station parses the A-MSDU, and searches for an MSDU sent by the A-MSDU to the receiving station.
  • the first generating module includes:
  • a setting unit configured to set an indication bit and an identifier bit carried by the AID structure according to a common attribute of the AID of the different target work stations, where the indication bit is used to indicate a meaningful bit of the AID structure, and the identifier bit is a meaningful bit in the AID structure for containing the AID of the different target workbench;
  • the first generating unit is configured to generate a receiving end address field of the AID structure carrying the indication bit and the identifier bit.
  • the setting unit is:
  • the first setting subunit is configured to set a page indicator bit and a page identifier bit carried by the AID structure when the AIDs of the different target work stations belong to the same page.
  • the setting unit is:
  • a second setting subunit configured to: when the AIDs of the different target work stations belong to the same block, set a block indication bit and a block identification bit carried by the AID structure.
  • the setting unit is:
  • a third setting subunit configured to: when the AIDs of the different target work stations belong to the same sub-block, set the sub-block indication bits and the sub-block identification bits carried by the AID structure.
  • the first generating module is:
  • a second generating unit configured to: when the different target work stations belong to the multicast group identified by the same multicast AID, generate a receiving end address domain that uses the multicast AID.
  • the aggregating module includes:
  • An encapsulating unit configured to add, in each MSDU, one or more of a destination address, a source address, a length of the MSDU, and a sequence control bit into a subframe of an A-MSDU;
  • An aggregation unit configured to aggregate subframes of multiple A-MSDUs into one A-MSDU;
  • the target workbench of at least two MSDUs is different.
  • a second aspect of the embodiments of the present invention provides a device for frame parsing, which is applied to a receiving station, and the device includes:
  • the receiving module is configured to receive the MPDU sent by the sending end working station, where the MPDU is sent by the sending end working station to the multiple media access control layer service data units MSDU sent to different target working stations into an aggregated media access control Layer service data unit A-MSDU; generating a receiving end address field using the association identifier AID structure according to the common attribute of the different target work stations, using the A-MSDU as a load, and using the AID structure as a receiving end address domain
  • the generated AID structure includes the AIDs of the different target work stations;
  • a parsing module configured to parse a receiving end address field of the MPDU
  • a determining module configured to determine whether an AID structure of the receiving end address field includes an AID of the receiving end working station
  • a search module configured to: when the AID structure of the receiving end address field includes a receiving end workbench In the case of the AID, the A-MSDU is parsed, and the MSDU sent to the receiving station is searched for in the A-MSDU.
  • the determining module includes:
  • An obtaining unit configured to obtain an indication bit carried by the AID structure of the receiving end address field; the first determining unit is configured to obtain an identifier bit according to the indication bit, and determine, according to the identifier bit, whether the AID structure includes The AID of the receiving station.
  • the first determining unit is:
  • a first determining subunit configured to: when the AID structure of the receiving end address field carries a page indicating bit, obtain a page identifier bit according to the page indicating bit, and determine whether the AID of the receiving end working station belongs to the The page identified by the page identification bit.
  • the first determining unit is:
  • a second determining sub-unit configured to: when the AID structure of the receiving end address field carries a block indicating bit, obtain a block identifier bit according to the block indicating bit, and determine whether the AID of the receiving end working station belongs to the The block identified by the block identifier bit.
  • the first determining unit is:
  • a third determining sub-unit configured to: when the AID structure of the receiving end address field carries a sub-block indicating bit, obtain a sub-block identifying bit according to the sub-block indicating bit, and determine an AID of the receiving end working station Whether it belongs to the sub-block identified by the sub-block identification bit.
  • the determining module includes: a second determining unit, configured to determine whether a multicast AID of the receiving end address domain is a working station of the receiving end Multicast AID of the multicast group.
  • a third aspect of the embodiments of the present invention provides a sending end working station, where the sending end working station includes:
  • the first memory is configured to store an instruction
  • the first processor is configured to retrieve an instruction
  • the instruction includes:
  • the receiving end station parses the received receiving end address field of the MPDU, and when the AID structure of the receiving end address field includes the AID of the receiving end working station, the receiving end The work station parses the A-MSDU to find an MSDU that is sent to the receiving station in the A-MSDU.
  • a fourth aspect of the embodiments of the present invention provides a receiving end working station, where the receiving end working station includes:
  • the second memory is configured to store an instruction
  • the second processor is configured to retrieve an instruction, where the instruction includes:
  • the MPDU includes the AIDs of the different target work stations;
  • Parsing a receiving end address field of the MPDU Determining whether the AID structure of the receiving end address field includes the AID of the receiving end working station; when the AID structure of the receiving end address field includes the AID of the receiving end working station, parsing the A-MSDU, searching for the A- The MSDU sent to the receiving station in the MSDU.
  • a fifth aspect of the embodiments of the present invention provides a communication system, where the communication system includes:
  • the transmitting end working station according to the third aspect of the present invention and the at least two receiving end working stations according to the fourth aspect of the present invention are provided.
  • a sixth aspect of the embodiments of the present invention provides a method for frame aggregation, which is applied to a sending end working station, where the method includes:
  • the receiving end station parses the received receiving end address field of the MPDU, and when the AID structure of the receiving end address field includes the AID of the receiving end working station, the receiving end The work station parses the A-MSDU to find an MSDU that is sent to the receiving station in the A-MSDU.
  • generating, by using a common attribute of the AID of the different target work stations, a receiving end address field of the AID structure includes:
  • a receiving end address field of the AID structure carrying the indication bit and the identification bit is generated.
  • the indication bit and the identifier carried by the AID structure are set according to the common attribute of the AID of the different target work stations. Bits include:
  • the page indicator bits and page identification bits carried by the AID structure are set.
  • the indicator bit and the identifier carried by the AID structure are set according to the common attribute of the AID of the different target work stations. Bits include:
  • the block indication bits and the block identification bits carried by the AID structure are set.
  • the indicator bit and the identifier carried by the AID structure are set according to the common attribute of the AID of the different target work stations. Bits include:
  • the sub-block indication bits and the sub-block identification bits carried by the AID structure are set.
  • the receiving end address field of the AID structure is generated according to the common attribute of the AIDs of the different target work stations, including:
  • the receiving end address field of the multicast AID is generated.
  • the multiple media access control layer service data to be sent to different target work stations includes:
  • the target workbench of at least two MSDUs is different.
  • a seventh aspect of the embodiments of the present invention provides a method for frame parsing, which is applied to a receiving end working station, where the method includes:
  • the MPDU includes the AIDs of the different target work stations;
  • determining whether the AID structure of the address field of the receiving end includes the AID of the receiving end working station includes:
  • the determining, according to the indication bit, obtaining an identifier bit, determining, according to the identifier bit, whether the AID structure includes includes:
  • the page identifier bit is obtained according to the page indicator bit, and it is determined whether the AID of the receiving end work station belongs to the page identified by the page identifier bit. .
  • the determining, according to the indication bit, obtaining an identifier bit, determining, according to the identifier bit, whether the AID structure includes The AID of the receiving station includes:
  • the block identifying bit is obtained according to the block indicating bit, and it is determined whether the AID of the receiving end working station belongs to the block identified by the block identifying bit. .
  • the determining, according to the indication bit, obtaining an identifier bit, determining, according to the identifier bit, whether the AID structure includes includes:
  • the sub-block identifying bit is obtained according to the sub-block indicating bit, and it is determined whether the AID of the receiving end working station belongs to the sub-block identifying bit. The identified sub-block.
  • determining whether the AID structure of the receiving end address domain includes the AID of the receiving end working station includes: determining whether the multicast AID of the receiving end address domain is The multicast AID of the multicast group to which the receiving station belongs.
  • the present invention has the following beneficial effects:
  • the embodiment of the invention provides a device and a method for frame aggregation and frame parsing, and aggregates multiple media access control layer service data units MSDUs sent to different target work stations into one aggregated medium access control layer service data unit.
  • the A-MSDU generates a receiving end address field of the AID structure according to the common attribute of the associated identifier AID of the different target work stations, uses the A-MSDU as a load, and generates the AID structure as a receiving end address field.
  • the MPDU the MPDU is sent, and after receiving the MPDU, the receiving end station parses the receiving end address field of the MPDU, and when the AID structure of the receiving end address field includes the AID of the receiving end working station, The receiving end station parses the A-MSDU, and searches for the MSDU sent by the A-MSDU to the receiving station, because the AID structure in the receiving end address field of the MPDU includes the AID of the different target workstations. , when the AID structure package of the receiving end address domain When the AID of the receiving station is included, the receiving station can continue to parse the A-MSDU, and find the MSDU sent to the receiving station in the A-MSDU, so as to be sent to different targets. Multiple MSDUs of the station are aggregated into one A-MSDU, encapsulated into MPDUs and sent to different target work stations, which expands the scope of A-MSDU frame aggregation technology.
  • Embodiment 1 is a schematic structural diagram of Embodiment 1 of a device for frame aggregation according to the present invention
  • FIG. 2 is a schematic diagram of a frame structure of an MPDU according to the present invention.
  • Embodiment 2 of a frame parsing apparatus according to the present invention
  • Embodiment 4 is a schematic structural diagram of Embodiment 3 of a transmitting end working platform according to the present invention.
  • FIG. 5 is a schematic structural diagram of Embodiment 4 of a transmitting end working platform according to the present invention.
  • Embodiment 5 of a communication system is a schematic structural diagram of Embodiment 5 of a communication system according to the present invention.
  • FIG. 8 is a flowchart of Embodiment 7 of a frame parsing method according to the present invention. detailed description
  • an embodiment of the present invention provides a device and a method for frame aggregation and frame parsing.
  • the preferred embodiments are described herein for illustrative purposes only and are not intended to limit the invention. And not
  • FIG. 1 is a schematic structural diagram of Embodiment 1 of a device for frame aggregation according to the present invention, which is applied to a transmitting station, and the device includes:
  • the aggregation module 101 is configured to aggregate multiple media access control layer service data units MSDUs sent to different target work stations into one aggregated medium access control layer service data unit A-MSDU.
  • the aggregation module 101 is configured to aggregate multiple MSDUs into one A-MSDU, where at least two MSDUs of the multiple MSDUs need to send different target work stations.
  • the aggregation module 101 includes:
  • an encapsulating unit configured to add, in each MSDU, one or more of a destination address, a source address, a length of the MSDU, and a sequence control bit into a subframe of an A-MSDU.
  • sequence control bits are numbered separately for the MSDUs sent to different target stations.
  • An aggregation unit configured to aggregate subframes of multiple A-MSDUs into one A-MSDU;
  • the target workbench of at least two MSDUs is different.
  • each A-MADU subframe includes: a destination address of the MSDU, a source address of the MSDU, a length of the MSDU, and a sequence control bit (Sequence Control). MSDU, as well as padding padding.
  • the padding padding is mainly used to supplement an encapsulated A-MADU subframe to an integer multiple of 4 bytes, and the last A-MADU subframe in the A-MSDU has no supplemental bit.
  • the destination address of the MSDU in each A-MSDU subframe is used to indicate the address of the target station to be transmitted by the MSDU in the A-MSDU subframe.
  • the Sequence Control is used to number the MSDUs in the A-MADU sub-frame.
  • the Sequence Control numbers the MSDUs sent to different target stations. For example: There are 5 MSDUs in the A-MSDU, the first MSDU is sent to the target workbench A, the second MSDU is sent to the target workbench B, and the third MSDU is sent to the target workbench A, the fourth MSDU. Sended to target workbench A, the fifth MSDU is sent to target workbench B.
  • the MPDU obtained by H without this A-MSDU encapsulation is the first MPDU.
  • the Sequence Control in the first A-MSDU subframe gives the first MSDU number 1; then the Sequence Control in the second A-MSDU subframe gives the second MSDU number 1; then the third A- Sequence Control in the MSDU subframe is programmed for the third MSDU The number is 2; then the Sequence Control in the fourth A-MSDU subframe is numbered 3 to the fourth MSDU; then the Sequence Control in the fifth A-MSDU subframe is numbered 2 to the fifth MSDU.
  • the Sequence Control numbers the MSDUs sent to different target stations.
  • Multiple A-MSDU subframes are aggregated to obtain one A-MSDU, and multiple MSDUs in the A-MSDU are sent to different target stations.
  • a first generation module 102 configured to generate, according to a common attribute of an Association Identifier (AID) of the different target work stations, a receiving end address field that uses an association identifier AID structure, where the AID structure includes the different target work The AID of the station.
  • AID Association Identifier
  • an MPDU includes an MPDU header, an A-MSDU, and a Frame Check Sequence (FCS).
  • FCS Frame Check Sequence
  • Address 1 has a fixed MAC address of the target workbench, and address 2, address 3, and address 4 store the source address, destination address, and sender station address of the MPDU. The correspondence between the devices is not fixed.
  • the short MPDU frame header format is:
  • address 1 is fixedly stored with a MAC address of the target workbench.
  • the MPDU stores only the MAC address of a target work station in the address 1 of the frame header. Therefore, after receiving the MPDU, all the receiving end stations that communicate with the transmitting station work station are analyzed.
  • the frame header of the MPDU is the same as the destination station that is the same as the MAC address carried by the address 1 in the frame header of the MPDU. Only the receiver station that is the target station can parse the A-MSDU in the MPDU. Only the MSDUs sent to the same target workbench can be aggregated in the A-MSDU.
  • the generating module 102 generates a receiving end address field of the associated ID AID structure according to the common attribute of the AIDs of the different target work stations, and the AID structure includes the AIDs of the different target work stations.
  • the structure of the AID is as follows:
  • the AID structure is used to replace the receiving end address field in the MAC address generating frame header in the prior art, and the AID structure includes the AIDs of different target work stations, that is, the receiving end address of the AID structure is used.
  • the domain can represent the addresses of a plurality of different target work stations.
  • the AID structure of the receiving end address field includes the AID of the receiving end work station
  • the receiving end working station can be used as the target working station to parse the A-MSDU in the MPDU. . Therefore, all the receiving end stations represented by the AID structure of the receiving end address field in the frame header of the MPDU in the present invention can parse the A-MSDU in the MPDU, and can find the receiving end working station in the A-MSDU. MSDU as the destination address.
  • the AID structure is used to replace the MAC address in the prior art in the address field of the receiving end of the MPDU, in the prior art, only the MAC address of the target working station can be filled in the receiving address field. Therefore, only A receiving station corresponding to the MAC address filled in the receiving address field can parse the A-MSDU in the MPDU; in the present invention, the AID structure can be used to represent the AIDs of multiple target stations having common attributes, therefore, The receiving end workbench corresponding to the AID of all the target work stations included in the AID structure of the receiving end address domain can parse the A-MSDU in the MPDU. Therefore, the A-MSDU in the MPDU can aggregate multiple different target working stations. MSDU.
  • the first generation module 102 has at least two possible configurations:
  • the first possible structure, the generating module 102 includes:
  • a setting unit configured to set an indication bit and an identifier bit carried by the AID structure according to a common attribute of the AID of the different target work stations;
  • the first generating unit is configured to generate a receiving end address field of the AID structure carrying the indication bit and the identifier bit.
  • the indication bit is used to indicate a meaningful bit of the AID structure, and the identification bit is a meaningful bit in the AID structure for containing the AID of the different target work stations.
  • the indicator bits include: a page indicator bit, a block indicator bit, and a block indicator bit.
  • the indication bit is the page indicator bit, it indicates that the meaningful bit in the AID structure is the page ID bit; when the indication bit is the block indication bit, it indicates that the meaningful bit in the AID structure is the page ID and the Block Index bit;
  • a bit is indicated for a block, it indicates that the meaningful bits in the AID structure are the page ID, the Block Index, and the Subblock Index bit.
  • the page ID is a page identifier bit, indicating a page
  • the page ID and the Block Index bit are block identifier bits, indicating a block in a page
  • the age ID, the Block Index, and the Subblock Index bit are block identification bits, representing a page A sub-block of a block in .
  • the AID Since the AID is a hierarchical structure and occupies 16 bits in total (such as the structure of the above AID), the AIDs of all receiving stations are distributed in 4 pages, each page includes 32 blocks, and each block includes 8 subblocks, each Each subblock consists of 8 workbenches.
  • the setting unit has at least three possible structures:
  • the first setting subunit is configured to set a page indicator bit and a page flag bit carried by the AID structure when the AIDs of the different target work stations belong to the same page.
  • the AID structure when the target workstation sent by the MSDU aggregated in the A-MSDU belongs to the same page, the AID structure carries the page indicator bit and the page identifier bit.
  • the page indicator uses two bits of ⁇ 3, M4 and M5 to indicate that the page ID is meaningful.
  • M4 and M3 as an example. M5 is not used and can be filled at will.
  • the page identifier is specific to the page ID. value. Since the AIDs of all receiving stations are distributed in 4 pages, the page ID occupies 2 bits, and the page IDs are 00, 01, 10 and 11.
  • the structure is as follows:
  • the MSDU of the end station, that is, the receiving station is not necessarily the target station, and the receiving station is the target station only when the A-MSDU carries the MSDU sent to the receiving station.
  • the second setting subunit is configured to set a block indication bit and a block identification bit carried by the AID structure when the AIDs of the different target work stations belong to the same block.
  • the AID structure when the target workstations transmitted by the MSDUs aggregated in the A-MSDU belong to the same block, the AID structure carries the block indication bits and the block identifier bits.
  • the block indicator uses M4M3 to indicate that the page ID and the Block Index are meaningful; the block identifier is the specific value of the block composed of the page ID and the Block Index, indicating the nth block distributed on the nth page, and each block includes 32 blocks.
  • the Block Index occupies 5 bits.
  • the AID structure is as follows:
  • the receiving station that belongs to the 64 AIDs can resolve the A-MSDU in the MPDU, but only the A-MSDU is aggregated.
  • the receiving workbench to be sent by the MSDU is the target workbench.
  • the structure is not specifically limited herein.
  • a third setting subunit configured to: when the AIDs of the different target work stations belong to the same sub-block, set the sub-block indication bit and the sub-block identification bit carried by the AID structure.
  • the AID structure when the target workstations transmitted by the MSDUs in the A-MSDU belong to the same block, the AID structure carries the sub-block indicator bits and the sub-block identifier bits.
  • the sub-block indication bit b 14b 13 indicates that the age ID, the Block Index, and the Subblock Index are meaningful; the sub-block indicates the n-th sub-block of the nth block distributed on the nth page, each block includes 8 sub-blocks, and the Subblock Index occupies 3 Bits.
  • the MSDU carrying the work station of the receiving end in the MSDU that is, the receiving work station is not necessarily the target work station.
  • the receiving station is the target station only when the A-MSDU carries the MSDU sent to the receiving station.
  • the receiving station that belongs to the 8 AIDs can resolve the A-MSDU in the MPDU, but only The receiving workbench to be sent by the MSDU aggregated in the A-MSDU is the target workbench.
  • the AID structure is not specifically limited herein.
  • the AID structure provided by the present invention can also represent only one receiving end workbench.
  • the structure of the AID is as follows:
  • the second possible structure, the generating module 102 is:
  • a second generating unit configured to: when the different target work stations belong to the multicast group identified by the same multicast AID, generate a receiving end address field that uses the multicast AID.
  • the receivers belonging to one multicast group use the same multicast Multicast AID. Since multiple receivers use the same Multicast AID, they receive When receiving the MPDU, the end device parses the Multicast AID in the address field of the receiving end. If the Multicast AID is the Multicast AID of the multicast group to which the receiving station belongs, the receiving station can parse the A- in the MPDU. MSDU.
  • the AID of the target workbench containing the subframe in the A-MSDU subframe can be implemented in two ways:
  • the destination address of the A-MSDU sub-frame may include the complete AID of the target work station, occupying a total of 13 bits, for example: 0110101100111; or may only include the meaningless part of the AID structure in the address field of the receiving end of the MPDU, such as:
  • the destination address of the A-MSDU subframe may be 100111.
  • the destination address of the A-MSDU subframe may be 111 when only the Station Index is meaningless.
  • the second module 103 is configured to generate the medium access control layer protocol data unit MPDU by using the A-MSDU as a load and using the AID structure as a receiving end address field.
  • the A-MSDU is used as a payload, and the frame header of the receiving end address field is added, and the cyclic check bit encapsulation is added to obtain the MPDU.
  • the frame header of the MPDU may be one of the following combinations: "Frame Control i or receiver address i or”, “Frame Control i or, receiver address field and sender address field”, “Frame Control field, Receiver address domain, sender address domain, and Quality of Service Control (QoS Control) domain, and "Frame Control domain, receiver address domain, and QoS Control domain,".
  • the QoS Control includes information such as workstation access priority.
  • the MPDU frame obtained after the encapsulation is as shown in FIG. 2, and the frame header of the address field of the receiving end of the AID structure is added in front of the A-MSDU, and the MPDU is encapsulated by adding the FCS after the A-MSDU.
  • the sending module 104 is configured to send the MPDU, so that the receiving end station parses the received receiving end address field of the MPDU, and the AID structure of the receiving end address field includes the AID of the receiving end working station.
  • the receiving end station parses the A-MSDU to find an MSDU sent by the A-MSDU to the receiving station.
  • the sender-side workbench obtains the MPDUs after encapsulating the A-MSDUs, and sends the MPDUs to all the receiving work stations that communicate with them.
  • the receiving end receives the MPDU, and parses the receiving end address field in the frame header of the MPDU.
  • the AID structure of the receiving end address field includes the AID of the receiving end working station, the receiving end works.
  • the station parses the A-MSDU, and the receiving station searches for the MSDU sent to the receiving station in the A-MSDU.
  • the target work station of the MSDU is the work station of the receiving end; if the MSDU is not found, the work station of the receiving end is not the target work station. It can be seen that the receiving station that can resolve the A-MSDU is not necessarily the target station.
  • the receiving end working station is The A-MSDU can be further analyzed, and the MSDUs sent to the working station of the receiving end in the A-MSDU are searched, and the multiple MSDUs sent to different target working stations are aggregated into one A-MSDU, and then encapsulated into MPDUs and sent to the MPDUs.
  • Different target workbenches expand the use of A-MSDU's frame aggregation technology.
  • FIG. 3 is a schematic structural diagram of Embodiment 2 of a frame parsing apparatus according to the present invention, which is applied to a receiving end working station, where the apparatus includes:
  • the receiving module 301 is configured to receive the MPDU sent by the sending station.
  • the MPDU is a transmitting end working station that aggregates multiple media access control layer service data units MSDUs sent to different target work stations into one aggregated medium access control layer service data unit A-MSDU; working according to the different targets
  • the common attribute of the AID of the station generates the receiving end address field of the AID structure, the A-MSDU is used as a load, and the AID structure is generated as the receiving end address field, and the AID structure includes the different target work stations.
  • AID The process of generating the MPDU is similar to that of the first embodiment. For details, refer to the description of the first embodiment, and details are not described herein again.
  • the parsing module 302 is configured to parse the receiving end address field of the MPDU.
  • All receiving workstations that communicate with the transmitting station can receive the MPDU and parse the receiving address field of the MPDU.
  • the determining module 303 is configured to determine whether the AID structure of the receiving end address field includes an AID of the receiving station.
  • the determining module 303 has at least two possible structures:
  • the first possible structure, the determining module 303 includes:
  • An obtaining unit configured to acquire an indication bit carried by an AID structure of the receiving address domain;
  • the first determining unit is configured to obtain an identifier according to the indication bit, and determine, according to the identifier, whether the AID structure includes an AID of the receiving station.
  • the first determining unit includes:
  • a first determining subunit configured to: when the AID structure of the receiving end address field carries a page indicating bit, obtain a page identifier bit according to the page indicating bit, and determine an AID of the receiving end working station Whether it belongs to the page identified by the page identifier.
  • the receiving address field in the MPDU uses the AID structure and can contain the AIDs of multiple receiving stations.
  • the page indicator bit carried in the AID structure indicates that only the Page ID is meaningful, and a specific value of the meaningful page identification bit Page ID is obtained according to the page indicator bit.
  • AID structure in the page indicator bit M4bl3 00 means & ⁇ 6 10 meaningful, 810 ⁇ ⁇ 111 ( ⁇ ,
  • X means that 0 or 1 can be filled as desired.
  • the AID structure is as follows:
  • a second determining subunit configured to: when the AID structure of the receiving end address field carries a block indicating bit, obtain a block identifier bit according to the block indicating bit, and determine an AID of the receiving end working station Whether it belongs to the block identified by the block identifier.
  • the receiving address field in the MPDU uses the AID structure and can contain the AIDs of multiple receiving stations.
  • the block indicator bit carried in the AID structure indicates the Page ID and the Block.
  • the Index is meaningful, and the meaningful block identification bit Page ID and the specific value of the Block Index are obtained according to the block indication bit.
  • the AID of the work station of the receiving end of the block. X means that you can fill 0 or 1 at will, then the AID structure is as follows:
  • the MSDU of each receiving station is not aggregated in the A-MSDU.
  • the 64 receiving stations can parse the A-MSDU in the MPDU, it is not always possible to find the MSDU with its AID as the destination address.
  • a third determining sub-unit configured to: when the AID structure of the receiving end address field carries a sub-block indicating bit, obtain a sub-block identifying bit according to the sub-block indicating bit, and determine that the receiving end works Whether the AID of the station belongs to the sub-block identified by the sub-block identification bit.
  • the receiving address field in the MPDU uses the AID structure and can contain the AIDs of multiple receiving stations.
  • the sub-block indication bit indicates that the Page ID, the Block Index, and the Subblock Index are meaningful, and the meaningful sub-block identification bits Page ID, Block Index, and Subblock Index are obtained according to the sub-block indication bits. The specific value.
  • the MSDU of each receiving station is not aggregated in the A-MSDU.
  • the eight receiving stations can parse the A-MSDU in the MPDU, it is not always possible to find the MSDU with its AID as the destination address.
  • the second possible structure, the judging module 303 package is:
  • the second determining unit is configured to determine whether the multicast AID of the receiving end address domain is a multicast AID of the multicast group to which the receiving station is located.
  • the receiving station determines whether the multicast AID is a multicast AID of the multicast group to which the receiving station belongs. Multiple receivers that belong to the same multicast group use the same multicast AID.
  • the searching module 304 is configured to: when the AID structure of the receiving end address field includes the AID of the receiving end station, parse the A-MSDU, and search for an MSDU sent by the A-MSDU to the receiving station.
  • the receiving station that uses this multicast AID can resolve the
  • A-MSDU searching for an A-MSDU subframe sent to the receiving station according to a destination address in the A-MSDU subframe in the A-MSDU, and obtaining an A-MSDU sent to the receiving station The MSDU in the subframe.
  • the receiving station can parse the A-MSDU in the MPDU, but does not necessarily include the MSDU sent to the receiving station.
  • the present invention has the following beneficial effects:
  • the AID structure in the receiving end address field of the MPDU may include the AIDs of multiple receiving work stations, and the receiving work station to which the AID included in the AID structure belongs may parse the A-MSDU in the MPDU, and therefore, the A-MSDU
  • the MSDU that can be sent to different target work stations can be aggregated, which expands the scope of use of A-MSUD.
  • the transmitting end working station includes a first memory 401 and a first processor 402.
  • the first memory 401 is configured to store an instruction, where the first
  • the processor 402 is configured to invoke an instruction, where the instruction includes: Converging multiple media access control layer service data units MSDUs sent to different target work stations into one aggregated medium access control layer service data unit A-MSDU;
  • the receiving end station parses the received receiving end address field of the MPDU, and when the AID structure of the receiving end address field includes the AID of the receiving end working station, the receiving end
  • the work station parses the A-MSDU, and searches for an MSDU sent by the A-MSDU to the receiving station;
  • the generating, by the common attribute of the AID of the different target work stations, the receiving end address domain instruction of the AID structure includes:
  • the instruction bit and the flag bit instruction carried by the AID structure according to the common attribute setting of the AID of the different target work stations include :
  • the indication of the indicator bit and the identifier bit carried by the AID structure according to the common attribute of the AID of the different target work stations includes:
  • the block indication bits and the block identification bits carried by the AID structure are set;
  • the indication of the indicator bit and the identifier bit carried by the AID structure according to the common attribute of the AID of the different target work stations includes:
  • the sub-block indication bits and the sub-block identification bits carried by the AID structure are set;
  • the receiving end address field instructions include:
  • the receiving end address field of the multicast AID is generated
  • the aggregating the multiple media access control layer service data units MSDUs sent to different target work stations into one aggregated medium access control layer service data unit A-MSDU instructions include:
  • the sequence control bit pair is sent to a different target work before each MSDU
  • the MSDUs of the stations are respectively labeled;
  • the target workbench of at least two MSDUs is different.
  • the transmitting end working station includes a second memory 501 and a second processor 502, where the second memory 501 is configured to store an instruction, and the second The processor 502 is configured to invoke an instruction, where the instruction includes:
  • the obtaining, according to the indication bit, the identifier bit, and determining, according to the identifier bit, whether the AID structure includes the AID instruction of the receiving end workbench includes:
  • the page identifier bit is obtained according to the page indicator bit, and it is determined whether the AID of the receiving end work station belongs to the page identified by the page identifier bit.
  • the obtaining, according to the indication bit, the identifier bit, and determining, according to the identifier bit, whether the AID structure includes the AID instruction of the receiving end workbench includes:
  • the block identifying bit is obtained according to the block indicating bit, and it is determined whether the AID of the receiving end working station belongs to the block identified by the block identifying bit.
  • the obtaining, according to the indication bit, the identifier bit, and determining, according to the identifier bit, whether the AID structure includes the AID instruction of the receiving end workbench includes:
  • the sub-block identifying bit is obtained according to the sub-block indicating bit, and it is determined whether the AID of the receiving end working station belongs to the sub-block identifying bit.
  • determining whether the AID structure of the receiving end address field includes the AID of the receiving end working station includes:
  • Embodiment 5 Determining whether the multicast AID of the receiving end address domain is a multicast AID of the multicast group to which the receiving station belongs.
  • FIG. 6 is a schematic structural diagram of a fifth embodiment of a communication system according to the present invention.
  • the system includes: a transmitting end working station 601 according to the third embodiment and a receiving end working station 602 according to the fourth embodiment.
  • FIG. 7 is a flowchart of Embodiment 6 of a frame aggregation method according to the present invention, where the method in Embodiment 6 is The method corresponding to the frame aggregation apparatus of the first embodiment is applied to a transmitting station, and the method includes:
  • Step 701 The multiple media access control layer service data units MSDUs sent to different target work stations are aggregated into one aggregated medium access control layer service data unit A-MSDU.
  • the aggregation of the MSDU into an aggregated medium access control layer service data unit A-MSDU includes: adding one or several items of a destination address, a source address, a length of the MSDU, and a sequence control bit in front of each MSDU to be encapsulated into one a subframe of the A-MSDU, the sequence control bits respectively label the MSDUs sent to different target stations;
  • the target workbench of at least two MSDUs is different.
  • Step 702 Generate a receiving end address field of the AID structure according to the common attribute of the AIDs of the different target work stations, where the AID structure includes the AIDs of the different target work stations.
  • an indicator bit and an identifier bit carried by the AID structure according to the common attribute of the AID of the different target work stations, where the indication bit is used to indicate a meaningful bit of the AID structure, and the identifier bit is meaningful in the AID structure.
  • the indicating the indicator bits and the identifiers carried by the AID structure according to the common attribute of the AIDs of the different target work stations include:
  • the page indicator bits and page identification bits carried by the AID structure are set.
  • the indicating the indicator bits and the identifiers carried by the AID structure according to the common attribute of the AIDs of the different target work stations include:
  • the block indication bits and the block identification bits carried by the AID structure are set.
  • the indication bit and the identifier bit carried by the AID structure according to the common attribute of the AID of the different target work stations include:
  • the sub-block indication bits and the sub-block identification bits carried by the AID structure are set.
  • the receiving end address field of the AID structure is generated according to the common attribute of the AID of the different target work stations, including:
  • the receiving end address field of the multicast AID is generated.
  • Step 703 The A-MSDU is used as a load, and the AID structure is used as a receiving end address field to generate a medium access control layer protocol data unit MPDU.
  • Step 704 Send the MPDU, so that the receiving end station parses the received receiving end address field of the MPDU, and when the AID structure of the receiving end address field includes the AID of the receiving end working station, The receiving end station parses the A-MSDU to find an MSDU that is sent to the receiving station in the A-MSDU.
  • Steps 701 to 704 are similar to the first embodiment, and refer to the description of the specific embodiment in the first embodiment, and details are not described herein again.
  • Example 7
  • FIG. 8 is a flowchart of a seventh embodiment of a frame parsing method according to the present invention.
  • the method according to the seventh embodiment is a method corresponding to the frame parsing apparatus according to the second embodiment, and is applied to a receiving end working station, where the method includes:
  • Step 801 Receive an MPDU sent by the sending station, where the MPDU is sent by the sending end station to the multiple media access control layer service data units MSDU sent to different target working stations into an aggregated medium access control layer service.
  • a data unit A-MSDU generating a receiving end address field using the AID structure according to the common attribute of the different target work station AID, using the A-MSDU as a load, and generating the AID structure as a receiving end address field,
  • the AID structure contains the AIDs of the different target stations.
  • Step 802 Parse the receiving end address field of the MPDU.
  • Step 803 Determine whether the AID structure of the receiving end address field includes the AID of the receiving station.
  • step 803 There are at least two possible implementations of step 803:
  • Whether the AID structure includes the AID of the receiving station includes:
  • the page identifier bit is obtained according to the page indicator bit, and it is determined whether the AID of the receiving end work station belongs to the page identified by the page identifier bit. .
  • Whether the AID structure includes the AID of the receiving station includes:
  • the block identifying bit is obtained according to the block indicating bit, and it is determined whether the AID of the receiving end working station belongs to the block identified by the block identifying bit. .
  • Whether the AID structure includes the AID of the receiving station includes:
  • the sub-block identifying bit is obtained according to the sub-block indicating bit, and it is determined whether the AID of the receiving end working station belongs to the sub-block identifying bit. The identified sub-block.
  • Step 804 When the AID structure of the receiving end address field includes the AID of the receiving end working station, parsing the A-MSDU, and searching for the A-MSDU sent to the receiving end working station. MSDU.
  • the receiving end station When receiving the MPDU, the receiving end station first determines whether the AID structure of the receiving end address field of the MPDU includes the AID of the receiving end working station, and the AID structure of the receiving end address domain includes the receiving end In the AID of the workbench, the receiving end address field parses the A-MSDU in the MPDU, and the receiving end address field searches for the A-MSDU subframe whose address is the destination address, finds the A-MSDU subframe, and receives The end address field acquires the MADU in the A-MSDU subframe.
  • Steps 801 to 804 are similar to the second embodiment. For reference, refer to the description in the second embodiment, and details are not described herein again.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Small-Scale Networks (AREA)

Abstract

Selon des modes de réalisation, la présente invention concerne un appareil et un procédé d'agrégation de trames et d'analyse de trames. De multiples MSDU envoyées à différentes plateformes cibles sont regroupées en une seule A-MSDU; un champ d'adresse de côté réception à structure AID est généré conformément à un attribut commun des AID des différentes plateformes; une MPDU obtenue après encapsulation de l'A-MSDU est envoyée à une plateforme côté réception communiquant avec une plateforme côté envoi; la plateforme côté réception analyse un champ d'adresse de côté réception d'un en-tête de trame de la MPDU reçue; et quand la structure AID du champ d'adresse de côté réception comprend un AID de la plateforme côté réception, la plateforme côté réception analyse l'A-MSDU et recherche une MSDU qui figure dans l'A-MSDU et utilise l'AID comme adresse de destination. Quand la structure AID du champ d'adresse de côté réception comprend l'AID de la plateforme côté réception, la plateforme côté réception peut continuer à analyser l'A-MSDU et à rechercher une MSDU qui figure dans l'A-MSDU et utilise l'AID comme adresse de destination, de sorte que de multiples MSDU envoyées à différentes plateformes cibles peuvent être agrégées en une seule A-MSDU, ce qui permet d'étendre la portée d'application de la technologie d'agrégation de trame de l'A-MSDU.
PCT/CN2014/076339 2014-04-28 2014-04-28 Appareil et procédé d'agrégation de trames et d'analyse de trames WO2015164998A1 (fr)

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CN201480076890.2A CN106068661B (zh) 2014-04-28 2014-04-28 帧聚合与帧解析的装置及方法

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