WO2017036257A1 - 一种无线局域网中触发帧传输的方法和装置 - Google Patents

一种无线局域网中触发帧传输的方法和装置 Download PDF

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Publication number
WO2017036257A1
WO2017036257A1 PCT/CN2016/090776 CN2016090776W WO2017036257A1 WO 2017036257 A1 WO2017036257 A1 WO 2017036257A1 CN 2016090776 W CN2016090776 W CN 2016090776W WO 2017036257 A1 WO2017036257 A1 WO 2017036257A1
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Prior art keywords
field
trigger
mac function
trigger frame
information
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PCT/CN2016/090776
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English (en)
French (fr)
Inventor
于健
杨讯
郭宇宸
林梅露
张佳胤
淦明
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华为技术有限公司
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Publication of WO2017036257A1 publication Critical patent/WO2017036257A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • 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

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method and apparatus for triggering frame transmission in a wireless local area network.
  • OFDMA Orthogonal Frequency Division Multiple Access
  • the draft standard has decided to adopt the trigger frame structure shown in Figure 1a.
  • the trigger frame belongs to a MAC (English: Media Access Control, Chinese Media Control Control) frame, and includes a MAC header, a frame body, and a frame check sequence field, where the frame body can carry different MACs. Functions such as channel detection, block acknowledgment request BAR or multi-user request to send MU-RTS.
  • the frame body includes a public domain and a site-by-site domain, and the public domain includes resource indications that all STAs need to read, and the site-by-site domain includes each STA needs to read respective resource indications.
  • a disadvantage of the prior art is that the public domain of the frame body of the trigger frame includes physical layer function information and MAC layer function information, and the physical layer function information and the MAC layer function information are mixed together, which is disadvantageous for site reception, and the existing trigger frame structure is only Define a trigger frame carrying a MAC function, no There are defined trigger frames that carry multiple MAC functions.
  • the main object of the present invention is to provide a method and apparatus for triggering frame transmission in a wireless local area network, which is used to solve the problem that the physical layer function information of the frame body and the MAC layer function information are mixed together in the existing trigger frame structure. And only the trigger frame carrying one MAC function is defined, and the problem of trigger frames carrying multiple MAC functions is not defined.
  • an embodiment of the present invention provides a method for triggering frame transmission in a wireless local area network, including:
  • a trigger frame where the trigger frame includes a trigger frame type identifier, where the trigger frame type identifier is used to distinguish different types of trigger frames, and the different types of trigger frames include: a trigger frame that does not carry a medium access control MAC function, A trigger frame carrying a single MAC function or a trigger frame carrying multiple MAC functions;
  • the trigger frame includes a MAC function number identifier, where the MAC function number identifier is used to indicate a number of MAC functions carried by the trigger frame.
  • the trigger frame carrying a single MAC function includes a trigger information field and a MAC function field;
  • the trigger information field includes a trigger information common field and a trigger information separate field
  • the MAC function field includes a MAC function public field and a MAC function separate field
  • the trigger information common field is located before the MAC function common field, the trigger information separate field is located before the MAC function separate field, and the trigger information common field is located before the trigger information separate field.
  • the trigger information common field in the trigger frame carrying a single MAC function, is used to refer to The public information of the one or more stations transmitting the data packet, where the trigger information common field includes at least one of the following parameters: a length of the data packet, a guard interval GI, a bandwidth BW, or a high efficiency long training sequence HE-LTF parameter;
  • the trigger information separate field is used to indicate separate information of each of the one or more stations transmitting the data packet, and the trigger information separate field includes at least one of the following parameters: an association identifier AID or a modulation code set MCS.
  • the trigger frame type identifier in the trigger frame carrying the single MAC function is further used to determine the MAC function, where The MAC function includes: sounding detection, block acknowledgment request BAR or random access trigger TF-R,
  • the trigger frame carrying a single MAC function carries an independent frame control field, and the frame control field indicates a MAC function carried by the trigger frame.
  • the field of the trigger frame carrying a single MAC function includes a form of an element field, where the element field includes a type and a length. And a value three part, the field of the trigger frame carrying a single MAC function includes at least one of the following: the trigger information separate field or the MAC function field.
  • the trigger frame is a trigger frame that carries multiple MAC functions
  • the trigger frame includes a trigger Information field and multiple MAC function fields
  • the trigger information field includes a trigger information common field and a trigger information separate field, and each of the plurality of MAC function fields includes a MAC function common field and a MAC function separate field;
  • the trigger information common field is located before the MAC function common field, the trigger information separate field is located before the MAC function separate field, and the trigger information common field is located before the trigger information separate field.
  • the trigger information common field is used to indicate common information of one or more stations transmitting data packets, and the trigger information common field includes at least one of the following parameters: a data packet. Length, guard interval GI, bandwidth BW or efficient long training sequence HE-LTF parameters;
  • the trigger information separate field is used to indicate separate information of each of the one or more stations transmitting the data packet, and the trigger information separate field includes at least one of the following parameters: an association identifier AID or a modulation code set MCS.
  • the trigger frame further includes a trigger frame type sub-identity, and is used to determine a specific function of each MAC function field, where The trigger type sub-identity is located in a trigger frame header, a MAC function public field, or a trigger information common field.
  • each of the MAC function fields carries an independent frame control field, and the frame control field indicates a specific MAC function, and the MAC function includes: sounding sounding, a block acknowledgment request BAR, or a random access trigger TF-R.
  • the field of the trigger frame that carries multiple MAC functions includes a form of an element field, where the element field includes a type,
  • the length and value three parts, the field of the trigger frame carrying a single MAC function includes at least one of the following: the trigger information separate field or the MAC function field.
  • the trigger frame is a trigger frame that carries multiple MAC functions
  • the trigger frame includes a common An information field and a site-by-site field, the public information field being located before the site-by-site field, the common information field including a trigger information common field and a plurality of MAC function common fields, the site-by-site field including trigger information separate field and MAC Function separate fields.
  • the trigger information individual field and the MAC function separate field in the site-by-site field are divided according to each site, or
  • the first part of the site-by-site field is all a separate field of trigger information, and the second part of the site-by-site field is all a separate field of MAC function.
  • the trigger information common field is used to indicate one or The plurality of stations transmit the common information of the data packet, where the trigger information common field includes at least one of the following parameters: a length of the data packet, a guard interval GI, a bandwidth BW, or a high efficiency long training sequence HE-LTF parameter;
  • the trigger information separate field is used to indicate separate information of each of the one or more stations transmitting the data packet, and the trigger information separate field includes at least one of the following parameters: an association identifier AID or a modulation code set MCS.
  • the trigger frame further includes a trigger frame type sub-identity, and is used to determine a specific function of each MAC function field.
  • the trigger type sub-identity is located in a trigger frame header, a MAC function public field, or a trigger information common field.
  • an embodiment of the present invention provides a device for triggering frame transmission in a wireless local area network, including:
  • the baseband circuit is configured to generate a trigger frame, where the trigger frame includes a trigger frame type identifier, where the trigger frame type identifier is used to distinguish different types of trigger frames, and the different types of trigger frames include: no medium access control MAC a trigger frame of a function, a trigger frame carrying a single MAC function, or a trigger frame carrying multiple MAC functions;
  • a radio frequency circuit configured to send the trigger frame.
  • the triggering frame generated by the baseband chip includes a MAC function number identifier, where the MAC function number identifier is used to indicate a MAC function carried by the trigger frame. number.
  • the triggering frame carrying a single MAC function includes a trigger information field. And a MAC function field;
  • the trigger information field includes a trigger information common field and a trigger information separate field
  • the MAC function field includes a MAC function public field and a MAC function separate field
  • the trigger information common field is located before the MAC function common field, the trigger information separate field is located before the MAC function separate field, and the trigger information common field is located before the trigger information separate field.
  • the trigger information common field is used to indicate one or more sites. Transmitting common information of the data packet, where the trigger information common field includes at least one of the following parameters: a length of the data packet, a guard interval GI, a bandwidth BW, or a high efficiency long training sequence HE-LTF parameter;
  • the trigger information separate field is used to indicate separate information of each of the one or more stations transmitting the data packet, and the trigger information separate field includes at least one of the following parameters: an association identifier AID or a modulation code set MCS.
  • the trigger frame type identifier in the trigger frame carrying the single MAC function is further used to determine the MAC function, where The MAC function includes: sounding detection, block acknowledgment request BAR or random access trigger TF-R,
  • the trigger frame carrying a single MAC function carries an independent frame control field, and the frame control field indicates a MAC function carried by the trigger frame.
  • the field of the trigger frame carrying a single MAC function includes a form of an element field, where the element field includes a type and a length. And a value three part, the field of the trigger frame carrying a single MAC function includes at least one of the following: the trigger information separate field or the MAC function field.
  • the trigger frame is a trigger frame that carries multiple MAC functions
  • the touch The sending frame includes a trigger information field and a plurality of MAC function fields
  • the trigger information field includes a trigger information common field and a trigger information separate field, and each of the plurality of MAC function fields includes a MAC function common field and a MAC function separate field;
  • the trigger information common field is located before the MAC function common field, the trigger information separate field is located before the MAC function separate field, and the trigger information common field is located before the trigger information separate field.
  • the trigger information common field is used to indicate one or more The station transmits the public information of the data packet, where the trigger information common field includes at least one of the following parameters: a length of the data packet, a guard interval GI, a bandwidth BW, or a high efficiency long training sequence HE-LTF parameter;
  • the trigger information separate field is used to indicate separate information of each of the one or more stations transmitting the data packet, and the trigger information separate field includes at least one of the following parameters: an association identifier AID or a modulation code set MCS.
  • the trigger frame further includes a trigger frame type sub-identity, and is used to determine a specific function of each MAC function field, where The trigger type sub-identity is located in a trigger frame header, a MAC function public field, or a trigger information common field.
  • each of the MAC function fields carries an independent frame control field, and the frame control field indicates a specific MAC function, and the MAC function includes: sounding sounding, a block acknowledgment request BAR, or a random access trigger TF-R.
  • the field of the trigger frame that carries multiple MAC functions includes a form of an element field, where the element field includes a type,
  • the length and value three parts, the field of the trigger frame carrying a single MAC function includes at least one of the following: the trigger information separate field or the MAC function field.
  • the trigger frame is a trigger frame that carries multiple MAC functions
  • the trigger frame includes a common An information field and a site-by-site field, the public information field being located before the site-by-site field, the common information field including a trigger information common field and a plurality of MAC function common fields, the site-by-site field including trigger information separate field and MAC Function separate fields.
  • the trigger information individual field and the MAC function separate field in the site-by-site field are divided according to each site, or
  • the first part of the site-by-site field is all a separate field of trigger information, and the second part of the site-by-site field is all a separate field of MAC function.
  • the trigger information common field is used to indicate one or The plurality of stations transmit the common information of the data packet, where the trigger information common field includes at least one of the following parameters: a length of the data packet, a guard interval GI, a bandwidth BW, or a high efficiency long training sequence HE-LTF parameter;
  • the trigger information separate field is used to indicate separate information of each of the one or more stations transmitting the data packet, and the trigger information separate field includes at least one of the following parameters: an association identifier AID or a modulation code set MCS.
  • the trigger frame further includes a trigger frame type sub-identity, and is used to determine a specific function of each MAC function field.
  • the trigger type sub-identity is located in a trigger frame header, a MAC function public field, or a trigger information common field.
  • the trigger frame includes a trigger frame type identifier, and the trigger frame type identifier is used to distinguish different types of trigger frames, the different types.
  • the triggering frame includes: a trigger frame that does not carry the medium access control MAC function, a trigger frame that carries a single MAC function, or a trigger frame that carries multiple MAC functions.
  • a unified frame format is adopted for different types of trigger frames. The design simplifies the structure of the trigger frame and reduces the complexity of the receiving site.
  • FIG. 1a is a frame structure diagram of a trigger frame in the prior art.
  • FIG. 1b is an application scenario diagram of the present invention.
  • Embodiment 1 of the present invention is a flow chart of Embodiment 1 of the present invention.
  • FIG. 3 is a structural diagram of a Frame Control field in a trigger frame according to an embodiment of the present invention.
  • FIG. 4 is a structural diagram of a single MAC function trigger frame carrying an embodiment of the present invention.
  • FIG. 5 is a structural diagram of a frame carrying a single MAC function trigger frame according to an embodiment of the present invention.
  • FIG. 6 is a trigger frame carrying a Sounding function according to an embodiment of the present invention.
  • FIG. 7 is a trigger frame carrying a BAR function according to an embodiment of the present invention.
  • FIG. 8 is a trigger frame carrying a TF-R function according to an embodiment of the present invention.
  • FIG. 9 is a structural diagram 3 of a frame carrying a single MAC function triggering frame according to an embodiment of the present invention.
  • FIG. 10 is a structural diagram of an element field according to an embodiment of the present invention.
  • FIG. 11 is a schematic structural diagram of a trigger frame carrying multiple MAC functions according to an embodiment of the present invention.
  • FIG. 12 is a schematic structural diagram of a trigger frame carrying multiple MAC functions according to an embodiment of the present invention.
  • FIG. 13 is a schematic structural diagram of a trigger frame carrying multiple MAC functions according to an embodiment of the present invention.
  • FIG. 14 is a schematic structural diagram of a trigger frame carrying multiple MAC functions according to an embodiment of the present invention.
  • FIG. 15 is a schematic structural diagram of a trigger frame carrying multiple MAC functions according to an embodiment of the present invention.
  • FIG. 16 is a simplified MU-RTS trigger frame structure according to an embodiment of the present invention.
  • Fig. 17 is a diagram showing resource block allocation in a common area in units of 20 MHz.
  • FIG. 19 is a unified resource block allocation indication map of a unicast/multicast trigger frame.
  • Figure 20 is a structural diagram of a physical device in an embodiment of the present invention.
  • the embodiment of the present invention can be applied to a wireless local area network (English: Wireless Local Area Network, WLAN for short).
  • the standard adopted by the WLAN is IEEE (English: Institute of Electrical and Electronics Engineers) 802.11 series.
  • the WLAN may include multiple basic service sets (English: Basic Service Set, BSS for short).
  • the network nodes in the basic service set are stations (English: Station, abbreviated as STA).
  • the site includes the access point class (abbreviation: AP). , English: Access Point) and non-access point class sites (English: None Access Point Station, referred to as: Non-AP STA).
  • Each basic service set may contain one AP and multiple Non-AP STAs associated with the AP.
  • Access point class sites also known as wireless access points or hotspots.
  • the AP is an access point for mobile users to enter the wired network. It is mainly deployed in the home, inside the building, and inside the campus. The typical coverage radius is tens of meters to hundreds of meters. Of course, it can also be deployed outdoors.
  • An AP is equivalent to a bridge connecting a wired network and a wireless network. Its main function is to connect the wireless network clients together and then connect the wireless network to the Ethernet.
  • the AP may be a terminal device or a network device with a WiFi (English: Wireless Fidelity) chip.
  • the AP may be a device supporting the 802.11ax system. Further, the AP may be a device supporting multiple WLAN technologies such as 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a.
  • Non-AP STA A non-access point class (English: None Access Point Station, referred to as Non-AP STA), which can be a wireless communication chip, a wireless sensor, or a wireless communication terminal.
  • Non-AP STA mobile phones that support WiFi communication, tablets that support WiFi communication, set-top boxes that support WiFi communication, smart TVs that support WiFi communication, and smart wearables that support WiFi communication
  • a vehicle communication device that supports WiFi communication functions and a computer that supports WiFi communication functions.
  • the site can support the 802.11ax system. Further optionally, the site supports multiple WLAN formats such as 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a.
  • Figure 1b is a schematic diagram of a typical WLAN deployment scenario, including an AP and three STAs, and the AP communicates with STA1, STA2, and STA3, respectively.
  • the AP can perform uplink and downlink transmission with different STAs on different time-frequency resources.
  • the AP can adopt different modes for uplink and downlink transmission, such as OFDMA single-user multiple-input multiple-output (SU-MIMO) mode, or OFDMA multi-user multiple input multiple output (Multi-User Multiple).
  • SU-MIMO OFDMA single-user multiple-input multiple-output
  • Multi-User Multiple OFDMA multi-user multiple input multiple output
  • MU-MIMO -Input Multiple-Output
  • the AP may simultaneously send a Physical Layer Protocol Data Unit (PPDU) to multiple sites or multiple site groups.
  • PPDU Physical Layer Protocol Data Unit
  • multiple sites may refer to sites in SU-MIMO mode
  • multiple site groups may refer to site groups in MU-MIMO mode.
  • the PPDU sent by the AP includes a Physical Layer Convergence Procedure (PLCP) header field and a data field, where the PLCP Header includes a legacy preamble (L-Preamble) and an efficient preamble.
  • the preamble portion includes a High Efficient Signaling A (HE-SIGA) portion and a High Efficient Signaling B (HE-SIGB) portion.
  • the PPDU may also include a Media Access Control (MAC) portion.
  • MAC Media Access Control
  • Embodiment 1 of the present invention provides a method for triggering frame transmission in a wireless local area network, and the method can be applied to a station, for example, an AP and a STA1-STA3 in FIG. 1b, and the station can support a next-generation WLAN standard, for example, 802.11ax System.
  • 2 is a flow chart of the method of transmitting an identifier, the specific steps are as follows:
  • Step 110 Generate a trigger frame, where the trigger frame includes a trigger frame type identifier, where the trigger frame type identifier is used to distinguish different types of trigger frames, and the different types of trigger frames include: not carrying The medium access control MAC address trigger frame, the trigger frame carrying a single MAC function, or the trigger frame carrying multiple MAC functions.
  • Step 120 Send the trigger frame.
  • the trigger frame is sent by the AP. If the trigger frame is a trigger frame that does not carry the medium access control MAC function, the STA sends a frame carrying the uplink data after waiting for a period of time after receiving the trigger frame.
  • the waiting time may include: SIFS (English: Short Interframe Space, Chinese: Short Frame Interval), DIFS (English: Distributed Inter-frame Spacing, Chinese: Distributed Interframe Space).
  • the STA sends a corresponding type of MAC frame after waiting for a period of time after receiving the trigger frame.
  • the corresponding STA after receiving the trigger frame, the corresponding STA sends a corresponding type of MAC frame after waiting for a period of time according to the scheduling MAC function type. For all STAs, multiple types of MAC frames are sent.
  • the trigger frame may also include only two types: a trigger frame that does not carry a MAC function and a trigger frame that carries a single MAC function, which is not limited by the present invention.
  • the trigger frame may also include only a trigger frame that carries a single MAC function.
  • the trigger frame type identifier is used to determine a specific MAC function, which is not limited by the present invention.
  • Frame control field of a possible MAC frame header is composed as shown in FIG. 3 .
  • the trigger frame type identifier may be located at the MAC frame header.
  • the trigger frame type identifier can be located in the Frame Control field in the MAC frame header.
  • the MAC frame is uniquely determined to be a trigger frame by the type and subtype in the Frame control field. Different types of trigger frames are defined by a 4-bit trigger frame extension field. For example, if eight different MAC function trigger frames are defined, "0000" means that the trigger frame is a trigger frame that does not carry the medium access control MAC function, and "0001-1000" represents eight types of triggers that carry a single MAC function. Frame, "1001" means carry more The triggering frame of the MAC function, and the remaining bits are reserved.
  • the location of the trigger frame extension field is not limited to the Frame control field, and may also be located in other parts of the MAC frame header, such as a separate field, juxtaposed with the Frame control field. In addition, it can also be located in the common info public area in the Frame body in Figure 1a.
  • the trigger frame type identifier may be located at the MAC frame header.
  • the trigger frame type identifier can be located in the Frame Control field in the MAC frame header.
  • the "11" reserved by the type field in the Frame control field is the trigger frame.
  • Different types of trigger frames are defined by 4 bit subtypes. For example, if eight different MAC function trigger frames are defined, "0000" means that the trigger frame is a trigger frame that does not carry the medium access control MAC function, and "0001-1000" represents eight types of triggers that carry a single MAC function.
  • the frame, "1001" represents a trigger frame carrying multiple MAC functions, and the remaining bits are reserved.
  • the trigger frame type identifier can also be implemented by using a bitmap (English: Bitmap). For example: a trigger frame with 8 different MAC functions is defined, which is implemented with an 8-bit bitmap. Each bit of the bitmap defines whether to use the MAC function. “00000000” represents the trigger frame as not carrying media.
  • the trigger frame of the access control MAC function "00010000” represents the trigger frame carrying the fourth MAC function, and "00010011” represents the trigger frame carrying the 4th, 7th, and 8th MAC functions.
  • the trigger frame type identifier in the form of a bitmap may be located in the Frame control field, or may be located in other parts of the MAC frame header, for example, a separate field, juxtaposed with the Frame control field. In addition, it can also be located in the common info public area in the Frame body in Figure 1a.
  • the triggering frame type identifier is further implemented by using a MAC function number identifier, where the MAC function number identifier is used to indicate a number of MAC functions carried by the trigger frame. Or, based on other trigger frame type indications, additionally indicating the number of MAC functions to indicate the number of MAC functions of the multi-function MAC trigger frame.
  • the number of bits identified by the number of MAC functions is M
  • the number of bits identified by the number of MAC functions is For example, if the number of MAC functions defined by the trigger frame is 8, 4 bits are required to define the MAC function number identifier, "0000" defines the number of MAC functions as 0, and "0001" defines the number of MAC functions as 1, "0010-1000 "The number of defined MAC functions is 3-8, and these bits are reserved for "1001-1111".
  • the MAC function number identifier may be located in the MAC frame header, and may also be located in other parts of the MAC frame header, for example, a separate field, juxtaposed with the Frame control field, and may also be located in the common info common area in the Frame body in FIG. 1a.
  • the trigger frame that does not carry the MAC function and the trigger frame that carries the single MAC function may not include the MAC function number identifier.
  • the trigger frame is divided into three aspects: a trigger frame that does not carry the medium access control MAC function, a trigger frame that carries a single MAC function, and a trigger frame that carries multiple MAC functions.
  • the trigger frame carrying a single MAC function includes a trigger information field and a MAC function field, as shown in FIG. 3;
  • the trigger information field includes a trigger information common field and a trigger information separate field
  • the MAC function field includes a MAC function public field and a MAC function separate field
  • the trigger information common field is located before the MAC function common field, the trigger information separate field is located before the MAC function separate field, and the trigger information common field is located before the trigger information separate field.
  • each component of the trigger information field and the MAC function field in FIG. 4 is: trigger information common field, trigger information separate field, MAC function common field, and MAC function separate field.
  • the ordering of the respective components of the trigger information field and the MAC function field may also adopt the arrangement of FIG. 5: a trigger information common field, a MAC function common field, a trigger information separate field, and a MAC function separate field.
  • the trigger information common field is used to indicate common information of one or more stations transmitting data packets, and the trigger information common field includes at least one parameter: data packet Length, guard interval GI, bandwidth BW or efficient long training sequence HE-LTF parameters;
  • the trigger information separate field is used to indicate separate information of each of the one or more stations transmitting the data packet, and the trigger information separate field includes at least one of the following parameters: an association identifier AID or a modulation code set MCS.
  • the trigger frame type identifier in the trigger frame carrying the single MAC function is further used to determine the MAC function, where the MAC function includes: sounding, block acknowledgment request BAR, or random access trigger TF-R,
  • the trigger frame carrying a single MAC function carries an independent frame control field, and the frame control field indicates a MAC function carried by the trigger frame.
  • the Sounding frame for channel sounding is as shown in FIG. 6, and the multi-user block acknowledgment request frame MU-BAR is as shown in FIG. 7, and the trigger frame TFR of the random access is as shown in FIG.
  • the trigger frame carrying a single MAC function may also carry a separate Frame control field. As shown in FIG. 9, the independent Frame control field is located in the MAC function common field.
  • the field of the trigger frame carrying a single MAC function includes a form of an element field, where the element field includes three parts: a type, a length, and a value, where the field of the trigger frame carrying a single MAC function includes at least one of the following fields. : the trigger information separate field or the MAC function field.
  • the form of the element field is as shown in FIG. 10, wherein the element identifier is used to indicate the type of the element, and the element identifier is used to know what the role of the subsequent information is.
  • the information behind “00” indicates the trigger information on a site-by-site basis; “01” indicates that the information behind is the MAC function field used to complete the MU-BAR.
  • the length is used to indicate the byte length of the element, and the element identifier is expanded to an optional field. When the element identifier cannot satisfy the number of the indicated element, the element identifier extension is enabled, and the length of the information field is variable, including the value of the element. .
  • the trigger information may be in the form of an element field in the trigger frame, and only the MAC function field may be in the element form in the trigger frame, and the trigger frame may also trigger the information that the individual field and the MAC function field are element forms.
  • the invention is not limited thereto.
  • the MAC function field can also be located before the trigger information field, at this time, the AID. It can be located only in the front MAC function information field, or in both the trigger information field and the MAC function field.
  • the length of each field may be 0, that is, there is no field, and the above description applies to the following embodiments.
  • the trigger frame is a trigger frame that carries multiple MAC functions
  • the trigger frame includes a trigger information field and multiple MAC function fields
  • the trigger information field includes a trigger information common field and a trigger information separate field, and each of the plurality of MAC function fields includes a MAC function common field and a MAC function separate field;
  • the trigger information common field is located before the MAC function common field, the trigger information separate field is located before the MAC function separate field, and the trigger information common field is located before the trigger information separate field.
  • the trigger frame carrying multiple MAC functions is as shown in FIG. 11 .
  • the trigger information common field is used to indicate common information of one or more stations transmitting data packets, and the trigger information common field includes at least one parameter: data Packet length, guard interval GI, bandwidth BW or efficient long training sequence HE-LTF parameters;
  • the trigger information separate field is used to indicate separate information of each of the one or more stations transmitting the data packet, and the trigger information separate field includes at least one of the following parameters: an association identifier AID or a modulation code set MCS.
  • the MAC function field may also be located before the trigger information field.
  • the AID may be located only in the preceding MAC function information field, or may exist in both the trigger information field and the MAC function field.
  • each field can be 0 in length, that is, there is no field.
  • the trigger frame further includes a trigger frame type sub-identification, and is used to determine a specific function of each MAC function field, where the trigger type sub-identity is located in a trigger frame header, a MAC function common word. Segment or trigger information public field,
  • each of the MAC function fields carries an independent frame control field, and the frame control field indicates a specific MAC function, and the MAC function includes: sounding sounding, a block acknowledgment request BAR, or a random access trigger TF-R.
  • each MAC function field carries a trigger frame type sub-identity, for example, a 4-bit bit trigger frame type sub-identification, where "0001" represents the sounding function, "0010” represents the BAR function, and "0011” represents the TF-R function.
  • the trigger frame type sub-identity can also be in the form of a bitmap (English: Bitmap). If four MAC functions are defined, it is represented by a 4-bit bitmap. For example, “0001" represents the sounding function, and "0010” represents the BAR function. Function, "0100” stands for TF-R function.
  • each MAC function field carries an independent frame control field as shown in FIG.
  • the field of the trigger frame carrying multiple MAC functions includes a form of an element field, where the element field includes three parts: a type, a length, and a value, where the field of the trigger frame carrying a single MAC function includes at least one of the following: Field: the trigger information separate field or the MAC function field.
  • an element field frame structure diagram carrying multiple MAC functions is shown in FIG.
  • the format of the element field has been explained in detail in the foregoing.
  • the trigger frame only the trigger information can be in the form of an element field.
  • the MAC function field can be in the element form.
  • the trigger frame can also trigger the information separate field and MAC function.
  • the fields are all in the form of elements, which are not limited in the present invention.
  • the trigger frame is a trigger frame that carries multiple MAC functions
  • the trigger frame includes a public information field and a site-by-site field, where the public information field is located before the site-by-site field, and the public information field includes The information common field and the plurality of MAC function common fields are triggered, and the site-by-site field includes a trigger information separate field and a MAC function separate field.
  • the trigger information individual field and the MAC function separate field in the site-by-site field are divided according to each site, or,
  • the first part of the site-by-site field is all a separate field of trigger information, and the second part of the site-by-site field is all a separate field of MAC function.
  • triggering information individual field and the MAC function separate field in the station-by-site field are divided according to each site as shown in FIG. 14.
  • the first part of the site-by-site field is a separate field of trigger information, and the second part of the site-by-site field is all MAC function separate fields, and the above-mentioned site-by-site field is divided as shown in FIG. 15.
  • the trigger information common field is used to indicate common information of one or more stations transmitting data packets, and the trigger information common field includes at least one parameter: data Packet length, guard interval GI, bandwidth BW or efficient long training sequence HE-LTF parameters;
  • the trigger information separate field is used to indicate separate information of each of the one or more stations transmitting the data packet, and the trigger information separate field includes at least one of the following parameters: an association identifier AID or a modulation code set MCS.
  • the trigger frame further includes a trigger frame type sub-identity for determining a specific function of each MAC function field, where the trigger type sub-identity is located in a trigger frame header, a MAC function common field, or a trigger information common field.
  • each MAC function field carries a trigger frame type sub-identity, for example, a 4-bit bit trigger frame type sub-identification, where "0001" represents the sounding function, "0010” represents the BAR function, and "0011” represents the TF-R function.
  • the trigger frame type sub-identity can also be in the form of a bitmap (English: Bitmap). If four MAC functions are defined, it is represented by a 4-bit bitmap. For example, “0001" represents the sounding function, and "0010” represents the BAR function. Function, "0100” stands for TF-R function.
  • the trigger information field may be simplified based on the MAC function feature.
  • a MU-RTS (English: Multiple User Request to Send) trigger frame is used to trigger multiple STAs to simultaneously perform CTS (English: Clear to Send, Chinese: Allow Send) .
  • CTS Chinese: Allow Send
  • the frame structure of the MU-RTS is as shown in FIG. 16.
  • the interaction between the RTS and the CTS is mainly used to set the NAV (English: Network Allocation Vector) to ensure that non-transceiver APs or STAs do not perform data transmission and reduce interference. Therefore, CTS is often transmitted in units of a minimum channel bandwidth of 20 MHz. And multiple 20 MHz copy transmissions are usually performed in a conventional physical layer packet structure.
  • NAV Network Allocation Vector
  • CTS is often transmitted in units of a minimum channel bandwidth of 20 MHz. And multiple 20 MHz copy transmissions are usually performed in a conventional physical layer packet structure.
  • simultaneous CTS English: Simultaneous CTS
  • the same packet structure is adopted, so resource block/channel allocation may not be performed.
  • MU-RTS performs multi-user CTS transmission
  • bandwidth negotiation that is, the AP tells the STA which 20MHz in the entire bandwidth to reply; the other is not to perform bandwidth.
  • negotiation all STAs reply at all 20MHz.
  • resource block allocation can be simplified, in units of 20 MHz, without all possible combinations of resource blocks; the other layer can directly allocate resource blocks. .
  • MCS of all STAs (English: Modulation Coding Set, Chinese: Modulation Coding Set), NSTS (English: Number of Space-Time Streams, Chinese: Space-time flow number), LDPC (English Low Density Parity Code, Chinese: Low Density Parity Check Code), STBC (English: Space-Time Block Code, Chinese: Space Time Block Code), BF (English: BeamForming, Chinese: The trigger information of the site-by-site field, such as beamforming, must be the same. Therefore, for these parameters, the trigger information of the site-by-site field can be extracted to the trigger information common field, or directly without indication, and the default parameter is adopted.
  • the transmission may be performed without triggering information of the site-by-site field such as MCS, NSTS, LDPC, STBC, and BF.
  • the trigger frame type determines the format of the trigger information field, the trigger frame type needs to be in front of the trigger information field or before the entire trigger information field. Because all STAs need to adopt the same MCS, NSTS, LDPC, BF and other site-by-site information parameters for transmission, such parameters can be extracted to the trigger information common field, or directly in the default mode, without transmission.
  • the trigger information public field may carry a bandwidth negotiation indication, indicating whether the station-by-site trigger information field includes a bandwidth negotiation indication.
  • the bandwidth negotiation indication can also simply adopt a bit bitmap manner to indicate which 20 MHz of the entire bandwidth to transmit, without requiring all combined resource block allocation indications as mentioned in the prior art. For the case where the resource block allocation indication is performed in the common area, the indication of the allocation of the positive resource blocks in the common area can also be saved, because the entire bandwidth is allocated by default to the bandwidth/20 MHz resource block of 20 MHz size.
  • the default CTS is a physical layer structure in a conventional format, so the UL GI indication can be omitted; Since the length of the CTS frame itself is fixed, the length of the PPDU can also be omitted; since the default is to perform CTS transmission on the entire bandwidth or the negotiated bandwidth with the same bandwidth as the downlink, the uplink bandwidth indication can also be omitted.
  • the information in the downlink resource block allocation indication, may be presented in a table index manner in units of 20 MHz. If a resource block is a resource block of more than 20 MHz, it may be indicated by a table index (English: Table Index) or a repeated table index, where the table index is a combination of all possible resource blocks in a table, each A combination has an index, and in the resource block allocation indication, the combined index number is indicated by the bit information to achieve the role of the resource block indication.
  • the table index here indicates an example, and the resource block allocation indication can also be performed in other ways, where the resource indication per 20 MHz is mainly emphasized here.
  • Figure 17 An example of an 80MHz resource block allocation indication is given.
  • the idea can also be used to design, as shown in FIG. 18.
  • the idea can also be used to design, as shown in FIG. 18.
  • the unicast and multicast trigger frame two forms of trigger frame, a unified design can be carried out.
  • the unicast/multicast trigger frame indication and the resource block allocation number/sequence indication are carried in the MAC frame header or the common area of the trigger information. If the indication is a multicast trigger frame, the resource block allocation number/sequence indication is used to indicate how many sub-common areas are followed, and each sub-common area sequentially performs an indication of resource blocks of 20 MHz or more than 20 MHz; if the indication is unicast The trigger frame, then the resource block allocation number/sequence indication is used to indicate the resource block allocation starting from the first 20 MHz. Because for a unicast trigger frame, the data of a single STA it triggers is only a resource block of 20 MHz or less within a certain 20 MHz or a single resource block larger than 20 MHz.
  • FIG. 19 is a unified resource block allocation indication of a unicast/multicast trigger frame.
  • the multicast triggering frame is responsible for the resource block allocation of the entire 80 MHz, and first indicates that the number of table indexes is 3, that is, the number of subsequent common resource block allocation sub-public fields is 3. Then, the subsequent resource indications starting from the first, second, and third 20 MHz are respectively indicated; and one STA is in the second 20 MHz, and the unicast trigger frame sent to the STA is only responsible for the 20 MHz.
  • the resource block allocation first indicates that the subsequent one table index indicates the resource block allocation starting from the second 20 MHz.
  • the resource block allocation on the 20 MHz is then indicated by a resource block allocation sub-common field.
  • the triggering frame includes a triggering frame type identifier, where the triggering frame type identifier is used to distinguish different types of triggering frames, and the different types of triggering frames include: not carrying The triggering frame of the medium access control MAC function, the trigger frame carrying a single MAC function, or the trigger frame carrying multiple MAC functions, through the above manner, unified frame format design for different types of trigger frames, simplifying the structure of the trigger frame , reducing the complexity of the receiving site.
  • the data transmission device is, for example, a site or a dedicated circuit or chip that implements related functions.
  • the site 1000 includes a processor 1010, a memory 1020, a baseband circuit 1030, a radio frequency circuit 1040, and an antenna 1050.
  • the means for transmitting the trigger frame may be the AP or STA1-STA3 shown in Figure 1b.
  • the processor 1010 controls the operation of the site 1000.
  • the memory 1020 can include read only memory and random access memory and provides instructions and data to the processor 1010, which can be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array, or other programmable logic. Device. A portion of memory 1020 may also include non-volatile line random access memory (NVRAM).
  • the baseband circuit 1030 is used to synthesize the baseband signal to be transmitted or to decode the received baseband signal.
  • the radio frequency circuit 1040 is for modulating a low frequency baseband signal to a high frequency carrier signal, and a high frequency carrier signal is transmitted through the antenna 1050.
  • the radio frequency circuit is also used to demodulate the high frequency signal received by the antenna 1050 into a low frequency carrier signal.
  • the various components of station 1000 are coupled together by a bus 1060, which in addition to the data bus includes a power bus, a control bus, and a status signal bus. However, for clarity of description, various buses are labeled as bus system 1060 in the figure. It should be noted that the above description of the site structure can be applied to the subsequent embodiments.
  • the baseband circuit 1030 is configured to generate a trigger frame, where the trigger frame includes a trigger frame type identifier, where the trigger frame type identifier is used to distinguish different types of trigger frames, and the different types of trigger frames include: no media access control A trigger frame of the MAC function, a trigger frame carrying a single MAC function, or a trigger frame carrying multiple MAC functions;
  • the RF circuit 1040 is configured to send the trigger frame.
  • the trigger frame may also include only two types: a trigger frame that does not carry a MAC function and a trigger frame that carries a single MAC function, which is not limited by the present invention.
  • the trigger frame may also include only the trigger frame that carries a single MAC function, which is not limited by the present invention.
  • the trigger frame generated by the baseband chip includes a MAC function number identifier, where The MAC function number identifier is used to indicate the number of MAC functions carried by the trigger frame.
  • the trigger frame type identifier may also be implemented by using a MAC function number identifier, and the specific implementation manner is described in detail in Embodiment 1.
  • the trigger frame that does not carry the MAC function and the trigger frame that carries the single MAC function may not include the MAC function number identifier.
  • the trigger frame generated by the baseband circuit includes at least three types, a trigger frame that does not carry a MAC function, a trigger frame that carries a single MAC function, and a trigger frame that carries multiple MAC functions.
  • the trigger frame carrying a single MAC function includes a trigger information field and a MAC function field;
  • the trigger information field includes a trigger information common field and a trigger information separate field
  • the MAC function field includes a MAC function public field and a MAC function separate field
  • the trigger information common field is located before the MAC function common field, the trigger information separate field is located before the MAC function separate field, and the trigger information common field is located before the trigger information separate field.
  • the present invention does not limit the order of each field in the trigger frame carrying a single MAC function, which has been described in detail in Embodiment 1, and will not be described again.
  • the trigger information common field is used to indicate common information of one or more stations transmitting data packets, and the trigger information common field includes at least one parameter: data packet Length, guard interval GI, bandwidth BW or efficient long training sequence HE-LTF parameters;
  • the trigger information separate field is used to indicate separate information of each of the one or more stations transmitting the data packet, and the trigger information separate field includes at least one of the following parameters: an association identifier AID or a modulation code set MCS.
  • the trigger frame type identifier in the trigger frame carrying the single MAC function is also used to Determining the MAC function
  • the MAC function includes: detecting a sounding, a block acknowledgment request BAR, or a random access trigger TF-R,
  • the trigger frame carrying a single MAC function carries an independent frame control field, and the frame control field indicates a MAC function carried by the trigger frame.
  • trigger frame carrying the detection function the trigger frame carrying the block acknowledgment request function, and the trigger frame carrying the random access trigger are explained in Embodiment 1, and are not described again.
  • the field of the trigger frame carrying a single MAC function includes a form of an element field, where the element field includes three parts: a type, a length, and a value, where the field of the trigger frame carrying a single MAC function includes at least one of the following fields. : the trigger information separate field or the MAC function field.
  • the trigger frame is a trigger frame that carries multiple MAC functions
  • the trigger frame includes a trigger information field and multiple MAC function fields
  • the trigger information field includes a trigger information common field and a trigger information separate field, and each of the plurality of MAC function fields includes a MAC function common field and a MAC function separate field;
  • the trigger information common field is located before the MAC function common field, the trigger information separate field is located before the MAC function separate field, and the trigger information common field is located before the trigger information separate field.
  • the present invention does not limit the order of each field in the trigger frame that carries multiple MAC functions, and has been described in detail in Embodiment 1, and details are not described herein again.
  • the trigger information common field is used to indicate common information of one or more stations transmitting data packets, and the trigger information common field includes at least one parameter: data Packet length, guard interval GI, bandwidth BW or efficient long training sequence HE-LTF parameters;
  • the trigger information separate field is used to indicate individual information of each station in the one or more stations, and the trigger information separate field includes at least one of the following parameters: an association identifier AID or modulation code set MCS.
  • the trigger frame further includes a trigger frame type sub-identification, and is used to determine a specific function of each MAC function field, where the trigger type sub-identity is located in a trigger frame header, a MAC function public field, or a trigger information public field.
  • each of the MAC function fields carries an independent frame control field, and the frame control field indicates a specific MAC function, and the MAC function includes: sounding sounding, a block acknowledgment request BAR, or a random access trigger TF-R.
  • trigger frame carrying the detection function the trigger frame carrying the block acknowledgment request function, and the trigger frame carrying the random access trigger are explained in Embodiment 1, and are not described again.
  • the field of the trigger frame carrying multiple MAC functions includes a form of an element field, where the element field includes three parts: a type, a length, and a value, where the field of the trigger frame carrying a single MAC function includes at least one of the following: Field: the trigger information separate field or the MAC function field.
  • the trigger frame is a trigger frame that carries multiple MAC functions
  • the trigger frame includes a public information field and a site-by-site field, where the public information field is located before the site-by-site field.
  • the common information field includes a trigger information common field and a plurality of MAC function common fields
  • the site-by-site field includes a trigger information separate field and a MAC function separate field.
  • the trigger information individual field and the MAC function separate field in the site-by-site field are divided according to each site, or
  • the first part of the site-by-site field is all a separate field of trigger information, and the second part of the site-by-site field is all a separate field of MAC function.
  • the trigger information common field is used to indicate common information of one or more stations transmitting data packets, and the trigger information public field packet Including at least one of the following parameters: length of the data packet, guard interval GI, bandwidth BW, or efficient long training sequence HE-LTF parameters;
  • the trigger information separate field is used to indicate separate information of each of the one or more stations transmitting the data packet, and the trigger information separate field includes at least one of the following parameters: an association identifier AID or a modulation code set MCS.
  • the trigger frame further includes a trigger frame type sub-identity for determining a specific function of each MAC function field, where the trigger type sub-identity is located in a trigger frame header, a MAC function common field, or a trigger information common field.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit. Specifically, it can be implemented by means of software plus necessary general hardware including general-purpose integrated circuits, general-purpose CPUs, general-purpose digital signal processors (DSPs), field-programmable gate arrays (FPGAs), and programmable logic devices (PLDs). ), general-purpose memory, general-purpose components, etc., of course, can also be realized by dedicated hardware including an application-specific integrated circuit (ASIC), a dedicated CPU, a dedicated memory, a dedicated component, and the like.
  • ASIC application-specific integrated circuit
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • the technical solution of the present invention contributes in essence or to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium.
  • a number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read only memory (English: Read-Only Memory, abbreviated as: ROM), a random access memory (English: Random Access Memory, abbreviated as: RAM), a magnetic disk or an optical disk, and the like.
  • ROM Read-Only Memory
  • RAM Random Access Memory
  • Software or instructions can also be transferred over a transmission medium.
  • a transmission medium For example, if you use coaxial cable, light Fiber optic cable, twisted pair, digital subscriber line (English: Digital Subscriber Line, DSL for short) or wireless technology (such as infrared, radio and microwave) to transmit software from websites, servers or other remote sources, then coaxial cable, fiber optic cable , twisted pair, DSL, or wireless technologies (such as infrared, radio, and microwave) are included in the definition of the transmission medium.

Abstract

本发明公开了一种无线局域网中触发帧传输的方法，该方法包括：生成触发帧，所述触发帧包括触发帧类型标识，所述触发帧类型标识用于区分不同类型的触发帧，所述不同类型的触发帧包括：不携带媒质接入控制MAC功能的触发帧、携带单个MAC功能的触发帧或携带多个MAC功能的触发帧。本发明还提供了相应的触发帧传输的装置，通过上述方式，对不同类型的触发帧进行统一的帧格式设计，简化了触发帧的结构，降低了接收站点的复杂度。

Description

一种无线局域网中触发帧传输的方法和装置
本申请要求于2015年9月2日提交中国专利局、申请号为201510559369.0、发明名称为“一种无线局域网中触发帧传输的方法和装置”的CN专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信技术领域，尤其是一种无线局域网中触发帧传输的方法和装置。
背景技术
目前，IEEE(英文：Institute of Electrical and Electronic Engineers，中文：电气与电子工程师协会)组织正在制定下一代WLAN(英文：Wireless Local Area Network，中文：无线局域网)的标准802.11ax。802.11ax将引入OFDMA(英文：Orthogonal Frequency Division Multiple Access，中文：正交频分多址)技术，OFDMA技术可以支持AP(英文：Access Point，中文：接入点)同时与多个STA(英文：Station，中文：站点)进行多用户传输，由此需要定义触发帧，触发帧由AP发送，用于对上行多用户传输进行资源指示。
标准草案已经决定采纳图1a所示的触发帧结构。该触发帧属于MAC(英文：Media Access Control，中文：媒质访问控制)帧，包括MAC帧头(MAC header)，帧体(Frame body)以及帧校验序列字段，其中帧体可以携带不同的MAC功能，例如：信道检测、块确认请求BAR或多用户请求发送MU-RTS。具体地，帧体包括公共域和逐个站点域，公共域包含所有STA都要读取的资源指示，逐个站点域包含每个STA需要读取各自的资源指示。
现有技术的缺点在于触发帧的帧体的公共域包含物理层功能信息和MAC层功能信息，将物理层功能信息和MAC层功能信息混在一起，不利于站点接收，此外现有触发帧结构只定义携带一个MAC功能的触发帧，没 有定义携带多个MAC功能的触发帧。
发明内容
有鉴于此，本发明的主要目的是提供一种无线局域网中触发帧传输的方法和装置，用于解决现有的触发帧结构中帧体的物理层功能信息和MAC层功能信息混在一起的问题，以及只定义携带一个MAC功能的触发帧，没有定义携带多个MAC功能的触发帧的问题。
第一方面，本发明实施例提供了一种无线局域网中触发帧传输的方法，包括：
生成触发帧，所述触发帧包括触发帧类型标识，所述触发帧类型标识用于区分不同类型的触发帧，所述不同类型的触发帧包括：不携带媒质接入控制MAC功能的触发帧、携带单个MAC功能的触发帧或携带多个MAC功能的触发帧；
发送所述触发帧。
结合第一方面，在第一方面第一种可能的实现方式中，所述触发帧包括MAC功能数目标识，所述MAC功能数目标识用于指示所述触发帧携带的MAC功能数目。
结合第一方面或者第一方面第一种可能的实现方式，在第一方面第二种可能的实现方式中，所述携带单个MAC功能的触发帧包括触发信息字段以及一个MAC功能字段；
所述触发信息字段包括触发信息公共字段和触发信息单独字段，所述MAC功能字段包括MAC功能公共字段和MAC功能单独字段；
所述触发信息公共字段位于所述MAC功能公共字段之前，所述触发信息单独字段位于所述MAC功能单独字段之前，所述触发信息公共字段位于所述触发信息单独字段之前。
结合第一方面第二种可能的实现方式，在第一方面第三种可能的实现方式中，所述携带单个MAC功能的触发帧中，所述触发信息公共字段用于指 示一个或多个站点传输数据包的公共信息，所述触发信息公共字段包括以下至少一个参数：数据包的长度、保护间隔GI、带宽BW或高效长训练序列HE-LTF参数；
所述触发信息单独字段用于指示一个或多个站点中每个站点传输数据包的单独信息，所述触发信息单独字段包括以下至少一个参数：关联标识AID或调制编码集MCS。
结合第一方面第三种可能的实现方式，在第一方面第四种可能的实现方式中，所述携带单个MAC功能的触发帧中的触发帧类型标识还用于确定所述MAC功能，所述MAC功能包括：探测sounding、块确认请求BAR或随机接入触发TF-R，
或者，所述携带单个MAC功能的触发帧携带独立的帧控制字段，所述帧控制字段指示触发帧携带的MAC功能。
结合第一方面第四种可能的实现方式，在第一方面第五种可能的实现方式中，所述携带单个MAC功能的触发帧的字段包括元素字段的形式，所述元素字段包含类型、长度和值三部分，所述携带单个MAC功能的触发帧的字段包括以下至少一个字段：所述触发信息单独字段或所述MAC功能字段。
结合第一方面或者第一方面第一种可能的实现方式，在第一方面第六种可能的实现方式中，若所述触发帧为携带多个MAC功能的触发帧，所述触发帧包括触发信息字段以及多个MAC功能字段；
所述触发信息字段包括触发信息公共字段和触发信息单独字段，所述多个MAC功能字段中的每个MAC功能字段包括MAC功能公共字段和MAC功能单独字段；
所述触发信息公共字段位于所述MAC功能公共字段之前，所述触发信息单独字段位于所述MAC功能单独字段之前，所述触发信息公共字段位于所述触发信息单独字段之前。
结合第一方面第六种可能的实现方式，在第一方面第七种可能的实现方 式中，所述携带多个MAC功能的触发帧中，所述触发信息公共字段用于指示一个或多个站点传输数据包的公共信息，所述触发信息公共字段包括以下至少一个参数：数据包的长度、保护间隔GI、带宽BW或高效长训练序列HE-LTF参数；
所述触发信息单独字段用于指示一个或多个站点中每个站点传输数据包的单独信息，所述触发信息单独字段包括以下至少一个参数：关联标识AID或调制编码集MCS。
结合第一方面第七种可能的实现方式，在第一方面第八种可能的实现方式中，所述触发帧还包括触发帧类型子标识，用于确定每个MAC功能字段的具体功能，所述触发类型子标识位于触发帧头、MAC功能公共字段或者触发信息公共字段，
或者，所述每个MAC功能字段携带独立的帧控制字段，所述帧控制字段指示具体的MAC功能，所述MAC功能包括：探测sounding、块确认请求BAR或随机接入触发TF-R。
结合第一方面第八种可能的实现方式，在第一方面第九种可能的实现方式中，所述携带多个MAC功能的触发帧的字段包括元素字段的形式，所述元素字段包含类型、长度和值三部分，所述携带单个MAC功能的触发帧的字段包括以下至少一个字段：所述触发信息单独字段或所述MAC功能字段。
结合第一方面或者第一方面第一种可能的实现方式，在第一方面第十种可能的实现方式中，若所述触发帧为携带多个MAC功能的触发帧，所述触发帧包括公共信息字段以及逐个站点字段，所述公共信息字段位于所述逐个站点字段之前，所述公共信息字段包括触发信息公共字段和多个MAC功能公共字段，所述逐个站点字段包括触发信息单独字段和MAC功能单独字段。
结合第一方面第十种可能的实现方式，在第一方面第十一种可能的实现方式中，所述逐个站点字段中触发信息单独字段和MAC功能单独字段按照每个站点来划分，或者，
所述逐个站点字段中第一部分全部为触发信息单独字段，所述逐个站点字段中第二部分全部为MAC功能单独字段。
结合第一方面第十一种可能的实现方式，在第一方面第十二种可能的实现方式中，所述携带多个MAC功能的触发帧中，所述触发信息公共字段用于指示一个或多个站点传输数据包的公共信息，所述触发信息公共字段包括以下至少一个参数：数据包的长度、保护间隔GI、带宽BW或高效长训练序列HE-LTF参数；
所述触发信息单独字段用于指示一个或多个站点中每个站点传输数据包的单独信息，所述触发信息单独字段包括以下至少一个参数：关联标识AID或调制编码集MCS。
结合第一方面第十二种可能的实现方式，在第一方面第十三种可能的实现方式中，所述触发帧还包括触发帧类型子标识，用于确定每个MAC功能字段的具体功能，所述触发类型子标识位于触发帧头、MAC功能公共字段或者触发信息公共字段。
第二方面，本发明实施例提供了一种无线局域网中触发帧传输的装置，包括：
基带电路，用于生成触发帧，所述触发帧包括触发帧类型标识，所述触发帧类型标识用于区分不同类型的触发帧，所述不同类型的触发帧包括：不携带媒质接入控制MAC功能的触发帧、携带单个MAC功能的触发帧或携带多个MAC功能的触发帧；
射频电路，用于发送所述触发帧。
结合第二方面，在第二方面的第一种可能的实现方式中，所述基带芯片生成的触发帧包括MAC功能数目标识，所述MAC功能数目标识用于指示所述触发帧携带的MAC功能数目。
结合第二方面或者第二方面第一种可能的实现方式，在第二方面第二种可能的实现方式中，所述携带单个MAC功能的触发帧包括触发信息字段以 及一个MAC功能字段；
所述触发信息字段包括触发信息公共字段和触发信息单独字段，所述MAC功能字段包括MAC功能公共字段和MAC功能单独字段；
所述触发信息公共字段位于所述MAC功能公共字段之前，所述触发信息单独字段位于所述MAC功能单独字段之前，所述触发信息公共字段位于所述触发信息单独字段之前。
结合第二方面第二种可能的实现方式，在第二方面第三种可能的实现方式中，所述携带单个MAC功能的触发帧中，所述触发信息公共字段用于指示一个或多个站点传输数据包的公共信息，所述触发信息公共字段包括以下至少一个参数：数据包的长度、保护间隔GI、带宽BW或高效长训练序列HE-LTF参数；
所述触发信息单独字段用于指示一个或多个站点中每个站点传输数据包的单独信息，所述触发信息单独字段包括以下至少一个参数：关联标识AID或调制编码集MCS。
结合第二方面第三种可能的实现方式，在第二方面第四种可能的实现方式中，所述携带单个MAC功能的触发帧中的触发帧类型标识还用于确定所述MAC功能，所述MAC功能包括：探测sounding、块确认请求BAR或随机接入触发TF-R，
或者，所述携带单个MAC功能的触发帧携带独立的帧控制字段，所述帧控制字段指示触发帧携带的MAC功能。
结合第二方面第四种可能的实现方式，在第二方面第五种可能的实现方式中，所述携带单个MAC功能的触发帧的字段包括元素字段的形式，所述元素字段包含类型、长度和值三部分，所述携带单个MAC功能的触发帧的字段包括以下至少一个字段：所述触发信息单独字段或所述MAC功能字段。
结合第二方面或者第二方面第一种可能的实现方式，在第二方面第六种可能的实现方式中，若所述触发帧为携带多个MAC功能的触发帧，所述触 发帧包括触发信息字段以及多个MAC功能字段；
所述触发信息字段包括触发信息公共字段和触发信息单独字段，所述多个MAC功能字段中的每个MAC功能字段包括MAC功能公共字段和MAC功能单独字段；
所述触发信息公共字段位于所述MAC功能公共字段之前，所述触发信息单独字段位于所述MAC功能单独字段之前，所述触发信息公共字段位于所述触发信息单独字段之前。
结合第二方面第六种可能的实现方式，在第二方面第七种可能的实现方式中，所述携带多个MAC功能的触发帧中，所述触发信息公共字段用于指示一个或多个站点传输数据包的公共信息，所述触发信息公共字段包括以下至少一个参数：数据包的长度、保护间隔GI、带宽BW或高效长训练序列HE-LTF参数；
所述触发信息单独字段用于指示一个或多个站点中每个站点传输数据包的单独信息，所述触发信息单独字段包括以下至少一个参数：关联标识AID或调制编码集MCS。
结合第二方面第七种可能的实现方式，在第二方面第八种可能的实现方式中，所述触发帧还包括触发帧类型子标识，用于确定每个MAC功能字段的具体功能，所述触发类型子标识位于触发帧头、MAC功能公共字段或者触发信息公共字段，
或者，所述每个MAC功能字段携带独立的帧控制字段，所述帧控制字段指示具体的MAC功能，所述MAC功能包括：探测sounding、块确认请求BAR或随机接入触发TF-R。
结合第二方面第八种可能的实现方式，在第二方面第九种可能的实现方式中，所述携带多个MAC功能的触发帧的字段包括元素字段的形式，所述元素字段包含类型、长度和值三部分，所述携带单个MAC功能的触发帧的字段包括以下至少一个字段：所述触发信息单独字段或所述MAC功能字段。
结合第二方面或者第二方面第一种可能的实现方式，在第二方面第十种可能的实现方式中，若所述触发帧为携带多个MAC功能的触发帧，所述触发帧包括公共信息字段以及逐个站点字段，所述公共信息字段位于所述逐个站点字段之前，所述公共信息字段包括触发信息公共字段和多个MAC功能公共字段，所述逐个站点字段包括触发信息单独字段和MAC功能单独字段。
结合第二方面第十种可能的实现方式，在第二方面第十一种可能的实现方式中，所述逐个站点字段中触发信息单独字段和MAC功能单独字段按照每个站点来划分，或者，
所述逐个站点字段中第一部分全部为触发信息单独字段，所述逐个站点字段中第二部分全部为MAC功能单独字段。
结合第二方面第十一种可能的实现方式，在第二方面第十二种可能的实现方式中，所述携带多个MAC功能的触发帧中，所述触发信息公共字段用于指示一个或多个站点传输数据包的公共信息，所述触发信息公共字段包括以下至少一个参数：数据包的长度、保护间隔GI、带宽BW或高效长训练序列HE-LTF参数；
所述触发信息单独字段用于指示一个或多个站点中每个站点传输数据包的单独信息，所述触发信息单独字段包括以下至少一个参数：关联标识AID或调制编码集MCS。
结合第二方面第十二种可能的实现方式，在第二方面第十三种可能的实现方式中，所述触发帧还包括触发帧类型子标识，用于确定每个MAC功能字段的具体功能，所述触发类型子标识位于触发帧头、MAC功能公共字段或者触发信息公共字段。
本发明实施例在无线局域网传输触发帧的过程中，所述触发帧包括触发帧类型标识，所述触发帧类型标识用于区分不同类型的触发帧，所述不同类 型的触发帧包括：不携带媒质接入控制MAC功能的触发帧、携带单个MAC功能的触发帧或携带多个MAC功能的触发帧，通过上述方式，对不同类型的触发帧进行统一的帧格式设计，简化了触发帧的结构，降低了接收站点的复杂度。
附图说明
图1a为现有技术中触发帧的帧结构图。
图1b为本发明的应用场景图。
图2为本发明实施例1的流程图。
图3为本发明实施例触发帧中Frame control字段结构图。
图4为本发明实施例携带单个MAC功能触发帧的结构图1。
图5为本发明实施例携带单个MAC功能触发帧的结构图2。
图6为本发明实施例携带Sounding功能的触发帧。
图7为本发明实施例携带BAR功能的触发帧。
图8为本发明实施例携带TF-R功能的触发帧。
图9为本发明实施例携带单个MAC功能触发帧的结构图3。
图10为本发明实施例元素字段的结构图。
图11为本发明实施例携带多个MAC功能的触发帧结构图1。
图12为本发明实施例携带多个MAC功能的触发帧结构图2。
图13为本发明实施例携带多个MAC功能的触发帧结构图3。
图14为本发明实施例携带多个MAC功能的触发帧结构图4。
图15为本发明实施例携带多个MAC功能的触发帧结构图5。
图16为本发明实施例中简化的MU-RTS触发帧结构。
图17为以20MHz为单位在公共区域进行资源块分配指示图。
图18为单播/多播触发帧统一的资源块分配指示图。
图19为单播/多播触发帧统一的资源块分配指示图。
图20为本发明实施例中实体装置的结构图。
具体实施方式
为使本发明的目的、技术方案和优点更加清楚，下面结合附图对本发明具体实施例作进一步的详细描述。显然，以下所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
本发明实施例可以应用于无线局域网(英文：Wireless Local Area Network,简称：WLAN)，目前WLAN采用的标准为IEEE(英文：Institute of Electrical and Electronics Engineers，中文：电气和电子工程师协会)802.11系列。WLAN可以包括多个基本服务集(英文：Basic Service Set，简称：BSS)，基本服务集中的网络节点为站点(英文：Station，简称：STA)，站点包括接入点类的站点(简称：AP，英文：Access Point)和非接入点类的站点(英文：None Access Point Station，简称：Non-AP STA)。每个基本服务集可以包含一个AP和多个关联于该AP的Non-AP STA。
接入点类站点，也称之为无线访问接入点或热点等。AP是移动用户进入有线网络的接入点，主要部署于家庭、大楼内部以及园区内部，典型覆盖半径为几十米至上百米，当然，也可以部署于户外。AP相当于一个连接有线网和无线网的桥梁，其主要作用是将各个无线网络客户端连接到一起，然后将无线网络接入以太网。具体地，AP可以是带有WiFi(英文：Wireless Fidelity,中文：无线保真)芯片的终端设备或者网络设备。可选地，AP可以为支持802.11ax制式的设备，进一步可选地，该AP可以为支持802.11ac、802.11n、802.11g、802.11b及802.11a等多种WLAN制式的设备。
非接入点类的站点(英文：None Access Point Station，简称：Non-AP STA)，可以是无线通讯芯片、无线传感器或无线通信终端。例如：支持WiFi通讯功能的移动电话、支持WiFi通讯功能的平板电脑、支持WiFi通讯功能的机顶盒、支持WiFi通讯功能的智能电视、支持WiFi通讯功能的智能可穿戴设 备、支持WiFi通讯功能的车载通信设备和支持WiFi通讯功能的计算机。可选地，站点可以支持802.11ax制式，进一步可选地，该站点支持802.11ac、802.11n、802.11g、802.11b及802.11a等多种WLAN制式。
图1b为一个典型的WLAN部署场景的系统示意图，包括一个AP和3个STA，AP分别与STA1、STA2和STA3进行通信。
引入OFDMA技术后的WLAN系统802.11ax中，AP可以在不同的时频资源上与不同的STA进行上下行传输。AP进行上下行传输可以采用不同的模式，如OFDMA单用户多输入多输出(Single-User Multiple-Input Multiple-Output，简称SU-MIMO)模式，或者OFDMA多用户多输入多输出(Multi-User Multiple-Input Multiple-Output，简称MU-MIMO)。
其中，AP可以给多个站点或多个站点组同时发送下行物理层协议数据单元(Physical Layer Protocol Data Unit，简称PPDU)。这里多个站点可以指SU-MIMO模式下的站点，多个站点组可以指MU-MIMO模式下的站点组。
具体地，AP发送的PPDU中包括物理层汇聚协议(Physical Layer Convergence Procedure，简称PLCP)头域(Header)和数据域，该PLCP Header中包含传统前导(L-Preamble)和高效前导部分，该高效前导部分包含高效信令A(High Efficient signaling A，简称HE-SIGA)部分和高效信令B(High Efficient signaling B，简称HE-SIGB)部分。该PPDU中还可以包括介质访问控制层(Media Access Control，简称MAC)部分。
实施例1
本发明实施例1提供了一种无线局域网中触发帧传输的方法，该方法可以应用于站点，例如：图1b中的AP和STA1-STA3，该站点可以支持下一代WLAN标准，例如：802.11ax制式。图2是该传输标识符的方法的流程图，具体步骤如下：
步骤110：生成触发帧，所述触发帧包括触发帧类型标识，所述触发帧类型标识用于区分不同类型的触发帧，所述不同类型的触发帧包括：不携带 媒质接入控制MAC功能的触发帧、携带单个MAC功能的触发帧或携带多个MAC功能的触发帧。
步骤120：发送所述触发帧。
需要说明的是，触发帧由AP发送，若所述触发帧为不携带媒质接入控制MAC功能的触发帧，则STA收到触发帧后等待一段时间后发送携带上行数据的帧。举例来讲，等待时间可以包括：SIFS(英文：Short Interframe Space，中文：短帧间隔)、DIFS(英文：Distributed Inter-frame Spacing，中文：分布式帧间间隔)。
若所述触发帧为携带单个MAC功能的触发帧，则STA收到触发帧后等待一段时间后发送相应类型的MAC帧。
若所述触发帧为携带多个MAC功能的触发帧，则相应STA收到触发帧后根据调度自己的MAC功能类型在等待一段时间后发送相应类型的MAC帧。对于所有STA来讲，发送多个类型的MAC帧。
需要说明的是，触发帧也可以只包括两类：不携带MAC功能的触发帧和携带单个MAC功能的触发帧，本发明对此不做限定。
需要说明的是，触发帧也可以只包括携带单个MAC功能的触发帧，此时触发帧类型标识用于确定具体的MAC功能，本发明对此不做限定。
需要说明的是，一种可能的MAC帧头的Frame control字段组成如图3所示。
需要说明的是，触发帧类型标识可以位于MAC帧头。触发帧类型标识可以位于MAC帧头中的Frame Control字段。通过Frame control字段中类型和子类型唯一确定该MAC帧为触发帧。通过4bit的触发帧扩展字段来定义不同类型的触发帧。举例说明:如果定义了8种不同MAC功能的触发帧，“0000”代表所述触发帧为不携带媒质接入控制MAC功能的触发帧，“0001-1000”代表8种携带单个MAC功能的触发帧，“1001”代表携带多 个MAC功能的触发帧，其余比特为预留情形。此外，触发帧扩展字段的位置不限于Frame control字段，还可以位于MAC帧头的其他部分，例如为一个单独的字段，与Frame control字段并列。此外，还可以位于图1a中Frame body中的common info公共区域。
需要说明的是，触发帧类型标识可以位于MAC帧头。触发帧类型标识可以位于MAC帧头中的Frame Control字段。通过将Frame control字段中类型字段预留的“11”为触发帧。通过4bit的子类型来定义不同类型的触发帧。举例说明:如果定义了8种不同MAC功能的触发帧，“0000”代表所述触发帧为不携带媒质接入控制MAC功能的触发帧，“0001-1000”代表8种携带单个MAC功能的触发帧，“1001”代表携带多个MAC功能的触发帧，其余比特为预留情形。
需要说明的是，触发帧类型标识还可以通过位图(英文：Bitmap)来实现。举例说明：定义了8种不同MAC功能的触发帧，则用8位的位图来实现，位图的每一位来定义是否使用该MAC功能，“00000000”代表所述触发帧为不携带媒质接入控制MAC功能的触发帧，“00010000”代表携带第4种MAC功能的触发帧，“00010011”代表携带第4，7，8种MAC功能的触发帧。采用位图形式的触发帧类型标识可以位于Frame control字段，还可以位于MAC帧头的其他部分，例如为一个单独的字段，与Frame control字段并列。此外，还可以位于图1a中Frame body中的common info公共区域。
可选地，所述触发帧类型标识还可以通过MAC功能数目标识来实现，所述MAC功能数目标识用于指示所述触发帧携带的MAC功能数目。或者，在其他触发帧类型指示的基础上，额外指示MAC功能的数目，用以指示多功能MAC触发帧的MAC功能的数目。
具体地，若触发帧定义的MAC功能数目为M个，则所述MAC功能数目标识的比特数为
Figure PCTCN2016090776-appb-000001
举例说明：若触发帧定义的MAC功能数目 为8个，则需要4个比特定义MAC功能数目标识，“0000”定义MAC功能数目为0，“0001”定义MAC功能数目为1，“0010-1000”定义MAC功能数目为3-8个，“1001-1111”这些比特预留。所述MAC功能数目标识可以位于MAC帧头，还可以位于MAC帧头的其他部分，例如为一个单独的字段，与Frame control字段并列，还可以位于图1a中Frame body中的common info公共区域。
需要说明的是，对于不携带MAC功能的触发帧和携带单个MAC功能的触发帧可以不包括MAC功能数目标识。
下文将对触发帧分为不携带媒质接入控制MAC功能的触发帧、携带单个MAC功能的触发帧和携带多个MAC功能的触发帧三方面来讲述。
具体地，所述携带单个MAC功能的触发帧包括触发信息字段以及一个MAC功能字段，如图3所示；
所述触发信息字段包括触发信息公共字段和触发信息单独字段，所述MAC功能字段包括MAC功能公共字段和MAC功能单独字段；
所述触发信息公共字段位于所述MAC功能公共字段之前，所述触发信息单独字段位于所述MAC功能单独字段之前，所述触发信息公共字段位于所述触发信息单独字段之前。
需要说明的是，图4中触发信息字段和MAC功能字段的各个组成部分的排序为：触发信息公共字段、触发信息单独字段、MAC功能公共字段和MAC功能单独字段。此外，触发信息字段和MAC功能字段的各个组成部分的排序还可以采用图5的排列：触发信息公共字段、MAC功能公共字段、触发信息单独字段和MAC功能单独字段。
具体地，所述携带单个MAC功能的触发帧中，所述触发信息公共字段用于指示一个或多个站点传输数据包的公共信息，所述触发信息公共字段包括以下至少一个参数：数据包的长度、保护间隔GI、带宽BW或高效长训练序列HE-LTF参数；
所述触发信息单独字段用于指示一个或多个站点中每个站点传输数据包的单独信息，所述触发信息单独字段包括以下至少一个参数：关联标识AID或调制编码集MCS。
可选地，所述携带单个MAC功能的触发帧中的触发帧类型标识还用于确定所述MAC功能，所述MAC功能包括：探测sounding、块确认请求BAR或随机接入触发TF-R，或者，所述携带单个MAC功能的触发帧携带独立的帧控制字段，所述帧控制字段指示触发帧携带的MAC功能。
具体地，用于信道探测的Sounding帧如图6所示，多用户块确认请求帧MU-BAR如图7所示，随机接入的触发帧TFR如图8所示。
需要说明的是，携带单个MAC功能的触发帧还可以携带独立的Frame control字段，如图9所示，该独立的Frame control字段位于MAC功能公共字段。
可选地，所述携带单个MAC功能的触发帧的字段包括元素字段的形式，所述元素字段包含类型、长度和值三部分，所述携带单个MAC功能的触发帧的字段包括以下至少一个字段：所述触发信息单独字段或所述MAC功能字段。
需要说明的是，元素字段的形式如图10所示，其中元素标识符用于指示元素的类型，通过元素标识符得知后续的信息的作用是干什么的。比如“00”的表示后边的信息是逐个站点的触发信息；“01”表示后边的信息是用来完成MU-BAR的MAC功能字段。长度用于指示该元素的字节长度，元素标识符扩展为可选字段，当元素标识符无法满足指示元素的数量时，才启用元素标识符扩展，信息字段的长度可变，包含元素的值。
需要说明的是，触发帧中可以只有触发信息单独字段是元素字段形式，触发帧中也可以只有MAC功能字段是元素形式，触发帧中也可以触发信息单独字段和MAC功能字段都是元素形式，本发明对此不做限定。
需要说明的是，MAC功能字段也可以位于触发信息字段之前，此时AID 可以只位于前边的MAC功能信息字段，也可以同时存在于触发信息字段和MAC功能字段。
此外，对于某些特定类型的触发帧，每个字段的长度可以为0，即不存在某个字段，上述说明适用于后文的实施例。
具体地，若所述触发帧为携带多个MAC功能的触发帧，所述触发帧包括触发信息字段以及多个MAC功能字段；
所述触发信息字段包括触发信息公共字段和触发信息单独字段，所述多个MAC功能字段中的每个MAC功能字段包括MAC功能公共字段和MAC功能单独字段；
所述触发信息公共字段位于所述MAC功能公共字段之前，所述触发信息单独字段位于所述MAC功能单独字段之前，所述触发信息公共字段位于所述触发信息单独字段之前。
需要说明的是，所述携带多个MAC功能的触发帧如图11所示。
可选地，所述携带多个MAC功能的触发帧中，所述触发信息公共字段用于指示一个或多个站点传输数据包的公共信息，所述触发信息公共字段包括以下至少一个参数：数据包的长度、保护间隔GI、带宽BW或高效长训练序列HE-LTF参数；
所述触发信息单独字段用于指示一个或多个站点中每个站点传输数据包的单独信息，所述触发信息单独字段包括以下至少一个参数：关联标识AID或调制编码集MCS。
需要说明的是，MAC功能字段也可以位于触发信息字段之前，此时AID可以只位于前边的MAC功能信息字段，也可以同时存在于触发信息字段和MAC功能字段。此外，对于某些特定类型的触发帧，每个字段的长度可以为0，即不存在某个字段。
可选地，所述触发帧还包括触发帧类型子标识，用于确定每个MAC功能字段的具体功能，所述触发类型子标识位于触发帧头、MAC功能公共字 段或者触发信息公共字段，
或者，所述每个MAC功能字段携带独立的帧控制字段，所述帧控制字段指示具体的MAC功能，所述MAC功能包括：探测sounding、块确认请求BAR或随机接入触发TF-R。
具体地，若触发帧类型标识确定该触发帧属于携带多个MAC功能的触发帧，则每个MAC功能字段都携带触发帧类型子标识，例如：用4位比特的触发帧类型子标识，其中“0001”代表sounding功能，“0010”代表BAR功能，“0011”代表TF-R功能。触发帧类型子标识还可以采用位图(英文：Bitmap)的形式，如果定义了4种MAC功能，则用4位的位图来表示，例如：“0001”代表sounding功能，“0010”代表BAR功能，“0100”代表TF-R功能。
需要说明的是，每个MAC功能字段携带独立的帧控制字段如图12所示。
可选地，所述携带多个MAC功能的触发帧的字段包括元素字段的形式，所述元素字段包含类型、长度和值三部分，所述携带单个MAC功能的触发帧的字段包括以下至少一个字段：所述触发信息单独字段或所述MAC功能字段。
需要说明的是，携带多个MAC功能的元素字段帧结构图如图13所示。元素字段的格式在前文已有详细阐释，触发帧中可以只有触发信息单独字段是元素字段形式，触发帧中也可以只有MAC功能字段是元素形式，触发帧中也可以触发信息单独字段和MAC功能字段都是元素形式，本发明对此不做限定。
具体地，若所述触发帧为携带多个MAC功能的触发帧，所述触发帧包括公共信息字段以及逐个站点字段，所述公共信息字段位于所述逐个站点字段之前，所述公共信息字段包括触发信息公共字段和多个MAC功能公共字段，所述逐个站点字段包括触发信息单独字段和MAC功能单独字段。
可选地，所述逐个站点字段中触发信息单独字段和MAC功能单独字段按照每个站点来划分，或者，
所述逐个站点字段中第一部分全部为触发信息单独字段，所述逐个站点字段中第二部分全部为MAC功能单独字段。
需要说明的是，逐个站点字段中触发信息单独字段和MAC功能单独字段按照每个站点来划分的情形如图14所示。
所述逐个站点字段中第一部分全部为触发信息单独字段，所述逐个站点字段中第二部分全部为MAC功能单独字段，上述逐个站点字段的划分如图15所示。
可选地，所述携带多个MAC功能的触发帧中，所述触发信息公共字段用于指示一个或多个站点传输数据包的公共信息，所述触发信息公共字段包括以下至少一个参数：数据包的长度、保护间隔GI、带宽BW或高效长训练序列HE-LTF参数；
所述触发信息单独字段用于指示一个或多个站点中每个站点传输数据包的单独信息，所述触发信息单独字段包括以下至少一个参数：关联标识AID或调制编码集MCS。
可选地，所述触发帧还包括触发帧类型子标识，用于确定每个MAC功能字段的具体功能，所述触发类型子标识位于触发帧头、MAC功能公共字段或者触发信息公共字段。
具体地，若触发帧类型标识确定该触发帧属于携带多个MAC功能的触发帧，则每个MAC功能字段都携带触发帧类型子标识，例如：用4位比特的触发帧类型子标识，其中“0001”代表sounding功能，“0010”代表BAR功能，“0011”代表TF-R功能。触发帧类型子标识还可以采用位图(英文：Bitmap)的形式，如果定义了4种MAC功能，则用4位的位图来表示，例如：“0001”代表sounding功能，“0010”代表BAR功能，“0100”代表TF-R功能。
具体地，对于携带单个MAC功能或者携带多个MAC功能的触发帧，可以基于MAC功能特征简化触发信息字段。示例性地，比如MU-RTS(英文：Multiple User Request to Send，中文：多用户请求发送)触发帧，用于触发多个STA同时进行CTS(英文：Clear to Send，中文：允许发送)的回复。MU-RTS的帧结构如图16所示。
在已有技术中，RTS与CTS的交互主要用于设置NAV(英文：Network Allocation Vector，中文：网络分配向量)，保证非收发的AP或STA不进行数据传输，减少干扰。因此CTS往往是以最小信道带宽20MHz为单位进行传输的。且通常以传统的物理层分组结构进行多个20MHz的复制传输。此外，对于CTS，由于存在同时CTS(英文：Simultaneous CTS)，即多个STA在相同的时频资源上回复CTS，采用相同的分组结构，因此是可以不进行资源块/信道分配的。此外，在MU-RTS进行多用户CTS传输时，往往会有两种模式，一种是进行带宽协商，即AP告诉STA在整个带宽里的哪几个20MHz进行回复；另外一种是不进行带宽协商，所有的STA均在所有的20MHz进行回复。这里包含两层意思，一是对于CTS的资源块调度，资源块分配可以简化，以20MHz为单位，而无需以所有可能的资源块组合来进行分配；另外一层是可以直接不进行资源块分配。
此外，由于所有的STA需要在某个20MHz内采用相同的分组结构，因此所有STA的MCS(英文：Modulation Coding Set，中文：调制编码集),NSTS(英文：Number of Space-Time Streams，中文：空时流数),LDPC(英文Low Density Parity Code，中文：低密度奇偶校验码),STBC(英文：Space-Time Block Code，中文：空时块编码),BF(英文：BeamForming，中文：波束成型)等逐个站点字段的触发信息指示必须相同，因此对于这些参数，其逐个站点字段的触发信息可以提取到触发信息公共字段，或直接不进行指示，采用默认的参数。因为同时CTS占用相同的时频资源，因此需要相对鲁棒的传输，所以往往可以默认STA需要采取最低的MCS，最低的流数等进行 传输，因此亦可不进行MCS,NSTS,LDPC,STBC,BF等逐个站点字段的触发信息指示。
因为触发帧类型会决定触发信息字段的格式，因此触发帧类型需要位于触发信息字段里边的前边或整个触发信息字段之前。因为所有STA需要采取相同的MCS,NSTS,LDPC,BF等逐个站点信息参数进行传输，因此这类参数可以提取到触发信息公共字段，或直接采用默认方式，不进行传输。此外，在触发信息公共字段可以携带是否带宽协商指示，指示逐个站点触发信息字段是否包含带宽协商指示。该带宽协商指示亦可简单采用比特位图的方式，指示在整个带宽的哪几个20MHz上进行传输，而不需要像已有技术中提到的进行所有组合的资源块分配指示。对于在公共区域进行资源块分配指示的情况，亦可以节省在公共区域进行正个资源块分配的指示，因为整个带宽会被默认分配为带宽/20MHz个的20MHz大小的资源块。
此外，对于MU-RTS，由于需要多个STA在相同时频资源回复同步CTS的作用是对传统STA进行NAV设置，因此默认CTS是采用传统格式的物理层结构，因此UL GI指示可以省去；因为CTS帧本身长度固定，因此PPDU长度也可以省去；因为默认是在和下行相同的带宽进行整个带宽或者所协商带宽上进行CTS传输，因此上行的带宽指示也可以省去。
需要说明的是，对于其他类型的触发帧，均可以依据触发帧类型进行相应的简化设计。
可选地，作为另一种实施方式，已有技术中在下行资源块分配指示中，可以以20MHz为单位，以表格索引的方式呈现。若某个资源块为超过20MHz的资源块，则可采用1个表格索引(英文：Table Index)或者重复表格索引来进行指示，其中表格索引为将所有可能的资源块组合存在一个表里，每一种组合会有一个索引，而在资源块分配指示中，通过比特信息指示组合的索引号，达到资源块指示的作用。这里的表格索引指示一个例子，还可以通过其他方式进行资源块分配的指示，这里主要强调每20MHz的资源指示。图17 给了一个80MHz资源块分配指示的例子。
可选地，对于触发帧的资源块分配指示，同样可以采用该思想进行设计，如图18所示。此外，针对单播和多播触发帧两种形式的触发帧，可以进行统一的设计。
在MAC帧头或者触发信息的公共区域携带单播/多播触发帧指示和资源块分配个数/序列指示。若指示为多播触发帧，则资源块分配个数/序列指示用来指示后续有多少个子公共区域，每个子公共区域按顺序进行逐个20MHz或者大于20MHz的资源块的指示；若指示为单播触发帧，则资源块分配个数/序列指示用来指示是从第几个20MHz开始的资源块分配。因为对于单播触发帧，其触发的单个STA的数据只在某个20MHz内部的一个小于等于20MHz的资源块或者某个单独的大于20MHz的资源块上。
图19为单播/多播触发帧统一的资源块分配指示。示例性地，对于一个下行帧，同时包括多播触发帧和单播触发帧。多播触发帧负责整个80MHz的资源块分配，首先指示表格索引的个数为3，即后续资源块分配子公共字段的个数为3。然后对后续的从第1个，第2个，第3个20MHz开始的资源指示进行分别指示；而某个STA处于第2个20MHz，而发给该STA的单播触发帧，只负责该20MHz的资源块分配，首先指示后续的1个表格索引指示的是从第2个20MHz开始的资源块分配。然后通过1个资源块分配子公共字段指示该20MHz上的资源块分配。
本发明实施例在无线局域网传输触发帧的过程中，所述触发帧包括触发帧类型标识，所述触发帧类型标识用于区分不同类型的触发帧，所述不同类型的触发帧包括：不携带媒质接入控制MAC功能的触发帧、携带单个MAC功能的触发帧或携带多个MAC功能的触发帧，通过上述方式，对不同类型的触发帧进行统一的帧格式设计，简化了触发帧的结构，降低了接收站点的复杂度。
实施例2
图20是本发明实施例2的无线局域网中传输触发帧的装置的示意性框图。该数据传输装置例如为站点，或者实现相关功能的专用电路或者芯片。该站点1000包括处理器1010、存储器1020、基带电路1030、射频电路1040和天线1050。该传输触发帧的装置可以为图1b中示出的AP或STA1-STA3。
具体地，处理器1010控制站点1000的操作。存储器1020可以包括只读存储器和随机存取存储器，并向处理器1010提供指令和数据，处理器可以是通用处理器、数字信号处理器、专用集成电路、现场可编程门阵列或者其他可编程逻辑器件。存储器1020的一部分还可以包括非易失行随机存取存储器(NVRAM)。基带电路1030是用来合成即将发射的基带信号，或对接收到的基带信号进行解码。射频电路1040用于将低频的基带信号调制到高频的载波信号，高频的载波信号通过天线1050发射。射频电路也用于将天线1050接收的高频信号解调成低频的载波信号。站点1000的各个组件通过总线1060耦合在一起，其中总线系统1060除包括数据总线之外，还包括电源总线、控制总线和状态信号总线。但是为了清楚说明起见，在图中将各种总线都标为总线系统1060。需要说明的是，上述对于站点结构的描述，可应用于后续的实施例。
基带电路1030，用于生成触发帧，所述触发帧包括触发帧类型标识，所述触发帧类型标识用于区分不同类型的触发帧，所述不同类型的触发帧包括：不携带媒质接入控制MAC功能的触发帧、携带单个MAC功能的触发帧或携带多个MAC功能的触发帧；
射频电路1040，用于发送所述触发帧。
需要说明的是，触发帧也可以只包括两类：不携带MAC功能的触发帧和携带单个MAC功能的触发帧，本发明对此不做限定。
需要说明的是，触发帧也可以只包括携带单个MAC功能的触发帧，本发明对此不做限定。
可选地，所述基带芯片生成的触发帧包括MAC功能数目标识，所述 MAC功能数目标识用于指示所述触发帧携带的MAC功能数目。
具体地，所述触发帧类型标识还可以通过MAC功能数目标识实现，具体实现方式在实施例1中已有详细阐述。
需要说明的是，对于不携带MAC功能的触发帧和携带单个MAC功能的触发帧可以不包括MAC功能数目标识。
需要说明的是，触发帧类型标识和MAC功能数目标识在实施例1中已有详细阐释，不再赘述。
具体地，基带电路生成的触发帧至少包括三类，不携带MAC功能的触发帧、携带单个MAC功能的触发帧和携带多个MAC功能的触发帧。
可选地，作为一种实施方式，所述携带单个MAC功能的触发帧包括触发信息字段以及一个MAC功能字段；
所述触发信息字段包括触发信息公共字段和触发信息单独字段，所述MAC功能字段包括MAC功能公共字段和MAC功能单独字段；
所述触发信息公共字段位于所述MAC功能公共字段之前，所述触发信息单独字段位于所述MAC功能单独字段之前，所述触发信息公共字段位于所述触发信息单独字段之前。
需要说明的是，本发明对携带单个MAC功能的触发帧中各个字段的排序不做限定，实施例1中已有详细阐述，不再赘述。
进一步地，所述携带单个MAC功能的触发帧中，所述触发信息公共字段用于指示一个或多个站点传输数据包的公共信息，所述触发信息公共字段包括以下至少一个参数：数据包的长度、保护间隔GI、带宽BW或高效长训练序列HE-LTF参数；
所述触发信息单独字段用于指示一个或多个站点中每个站点传输数据包的单独信息，所述触发信息单独字段包括以下至少一个参数：关联标识AID或调制编码集MCS。
可选地，所述携带单个MAC功能的触发帧中的触发帧类型标识还用于 确定所述MAC功能，所述MAC功能包括：探测sounding、块确认请求BAR或随机接入触发TF-R，
或者，所述携带单个MAC功能的触发帧携带独立的帧控制字段，所述帧控制字段指示触发帧携带的MAC功能。
需要说明的是，携带探测功能的触发帧、携带块确认请求功能的触发帧和携带随机接入触发的触发帧在实施例1中已有解释，不再赘述。
可选地，所述携带单个MAC功能的触发帧的字段包括元素字段的形式，所述元素字段包含类型、长度和值三部分，所述携带单个MAC功能的触发帧的字段包括以下至少一个字段：所述触发信息单独字段或所述MAC功能字段。
可选地，作为另一种实施方式，若所述触发帧为携带多个MAC功能的触发帧，所述触发帧包括触发信息字段以及多个MAC功能字段；
所述触发信息字段包括触发信息公共字段和触发信息单独字段，所述多个MAC功能字段中的每个MAC功能字段包括MAC功能公共字段和MAC功能单独字段；
所述触发信息公共字段位于所述MAC功能公共字段之前，所述触发信息单独字段位于所述MAC功能单独字段之前，所述触发信息公共字段位于所述触发信息单独字段之前。
需要说明的是，本发明对携带多个MAC功能的触发帧中各个字段的排序不做限定，实施例1中已有详细阐述，不再赘述。
可选地，所述携带多个MAC功能的触发帧中，所述触发信息公共字段用于指示一个或多个站点传输数据包的公共信息，所述触发信息公共字段包括以下至少一个参数：数据包的长度、保护间隔GI、带宽BW或高效长训练序列HE-LTF参数；
所述触发信息单独字段用于指示一个或多个站点中每个站点传输数据包的单独信息，所述触发信息单独字段包括以下至少一个参数：关联标识 AID或调制编码集MCS。
可选地，所述触发帧还包括触发帧类型子标识，用于确定每个MAC功能字段的具体功能，所述触发类型子标识位于触发帧头、MAC功能公共字段或者触发信息公共字段，
或者，所述每个MAC功能字段携带独立的帧控制字段，所述帧控制字段指示具体的MAC功能，所述MAC功能包括：探测sounding、块确认请求BAR或随机接入触发TF-R。
需要说明的是，关于触发帧类型子标识如何定义，在实施例1中已有详细阐述，不再赘述。
需要说明的是，携带探测功能的触发帧、携带块确认请求功能的触发帧和携带随机接入触发的触发帧在实施例1中已有解释，不再赘述。
可选地，所述携带多个MAC功能的触发帧的字段包括元素字段的形式，所述元素字段包含类型、长度和值三部分，所述携带单个MAC功能的触发帧的字段包括以下至少一个字段：所述触发信息单独字段或所述MAC功能字段。
可选地，作为另一实施方式，若所述触发帧为携带多个MAC功能的触发帧，所述触发帧包括公共信息字段以及逐个站点字段，所述公共信息字段位于所述逐个站点字段之前，所述公共信息字段包括触发信息公共字段和多个MAC功能公共字段，所述逐个站点字段包括触发信息单独字段和MAC功能单独字段。
具体地，所述逐个站点字段中触发信息单独字段和MAC功能单独字段按照每个站点来划分，或者，
所述逐个站点字段中第一部分全部为触发信息单独字段，所述逐个站点字段中第二部分全部为MAC功能单独字段。
可选地，所述携带多个MAC功能的触发帧中，所述触发信息公共字段用于指示一个或多个站点传输数据包的公共信息，所述触发信息公共字段包 括以下至少一个参数：数据包的长度、保护间隔GI、带宽BW或高效长训练序列HE-LTF参数；
所述触发信息单独字段用于指示一个或多个站点中每个站点传输数据包的单独信息，所述触发信息单独字段包括以下至少一个参数：关联标识AID或调制编码集MCS。
可选地，所述触发帧还包括触发帧类型子标识，用于确定每个MAC功能字段的具体功能，所述触发类型子标识位于触发帧头、MAC功能公共字段或者触发信息公共字段。
需要补充说明的是，本发明各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以是两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。具体的，可以借助软件加必需的通用硬件的方式来实现，通用硬件包括通用集成电路、通用CPU、通用数字信号处理器(DSP)、现场可编程门阵列(FPGA)、可编程逻辑器件(PLD)、通用存储器、通用元器件等，当然也可以通过专用硬件包括专用集成电路(ASIC)、专用CPU、专用存储器、专用元器件等来实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分，或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(英文：Read-Only Memory，简称:ROM)、随机存取存储器(英文：Random Access Memory，简称:RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
软件或指令还可以通过传输介质来传输。例如，如果使用同轴电缆、光 纤光缆、双绞线、数字用户线(英文：Digital Subscriber Line,简称：DSL)或者无线技术(如红外线、无线电和微波)从网站、服务器或其它远程源传输软件，那么同轴电缆、光纤光缆、双绞线、DSL或者无线技术(如红外线、无线电和微波))包括在传输介质的定义中。

Claims (28)

  1. 一种无线局域网中触发帧传输的方法，其特征在于，包括：
    生成触发帧，所述触发帧包括触发帧类型标识，所述触发帧类型标识用于区分不同类型的触发帧，所述不同类型的触发帧包括：不携带媒质接入控制MAC功能的触发帧、携带单个MAC功能的触发帧或携带多个MAC功能的触发帧；
    发送所述触发帧。
  2. 根据权利要求1所述的方法，其特征在于，所述触发帧包括MAC功能数目标识，所述MAC功能数目标识用于指示所述触发帧携带的MAC功能数目。
  3. 根据权利要求1或2所述的方法，其特征在于，所述携带单个MAC功能的触发帧包括触发信息字段以及一个MAC功能字段；
    所述触发信息字段包括触发信息公共字段和触发信息单独字段，所述MAC功能字段包括MAC功能公共字段和MAC功能单独字段；
    所述触发信息公共字段位于所述MAC功能公共字段之前，所述触发信息单独字段位于所述MAC功能单独字段之前，所述触发信息公共字段位于所述触发信息单独字段之前。
  4. 根据权利要求3所述的方法，其特征在于，所述携带单个MAC功能的触发帧中，所述触发信息公共字段用于指示一个或多个站点传输数据包的公共信息，所述触发信息公共字段包括以下至少一个参数：数据包的长度、保护间隔GI、带宽BW或高效长训练序列HE-LTF参数；
    所述触发信息单独字段用于指示一个或多个站点中每个站点传输数据包的单独信息，所述触发信息单独字段包括以下至少一个参数：关联标识AID或调制编码集MCS。
  5. 根据权利要求4所述的方法，其特征在于，所述携带单个MAC功能的触发帧中的触发帧类型标识还用于确定所述MAC功能，所述MAC功能包 括：探测sounding、块确认请求BAR或随机接入触发TF-R，
    或者，所述携带单个MAC功能的触发帧携带独立的帧控制字段，所述帧控制字段指示触发帧携带的MAC功能。
  6. 根据权利要求5所述的方法，其特征在于，所述携带单个MAC功能的触发帧的字段包括元素字段的形式，所述元素字段包含类型、长度和值三部分，所述携带单个MAC功能的触发帧的字段包括以下至少一个字段：所述触发信息单独字段或所述MAC功能字段。
  7. 根据权利要求1或2所述的方法，其特征在于，若所述触发帧为携带多个MAC功能的触发帧，所述触发帧包括触发信息字段以及多个MAC功能字段；
    所述触发信息字段包括触发信息公共字段和触发信息单独字段，所述多个MAC功能字段中的每个MAC功能字段包括MAC功能公共字段和MAC功能单独字段；
    所述触发信息公共字段位于所述MAC功能公共字段之前，所述触发信息单独字段位于所述MAC功能单独字段之前，所述触发信息公共字段位于所述触发信息单独字段之前。
  8. 根据权利要求7所述的方法，其特征在于，所述携带多个MAC功能的触发帧中，所述触发信息公共字段用于指示一个或多个站点传输数据包的公共信息，所述触发信息公共字段包括以下至少一个参数：数据包的长度、保护间隔GI、带宽BW或高效长训练序列HE-LTF参数；
    所述触发信息单独字段用于指示一个或多个站点中每个站点传输数据包的单独信息，所述触发信息单独字段包括以下至少一个参数：关联标识AID或调制编码集MCS。
  9. 根据权利要求8所述的方法，其特征在于，所述触发帧还包括触发帧类型子标识，用于确定每个MAC功能字段的具体功能，所述触发类型子标识位于触发帧头、MAC功能公共字段或者触发信息公共字段，
    或者，所述每个MAC功能字段携带独立的帧控制字段，所述帧控制字段指示具体的MAC功能，所述MAC功能包括：探测sounding、块确认请求BAR或随机接入触发TF-R。
  10. 根据权利要求9所述的方法，其特征在于，所述携带多个MAC功能的触发帧的字段包括元素字段的形式，所述元素字段包含类型、长度和值三部分，所述携带单个MAC功能的触发帧的字段包括以下至少一个字段：所述触发信息单独字段或所述MAC功能字段。
  11. 根据权利要求1或2所述的方法，其特征在于，若所述触发帧为携带多个MAC功能的触发帧，所述触发帧包括公共信息字段以及逐个站点字段，所述公共信息字段位于所述逐个站点字段之前，所述公共信息字段包括触发信息公共字段和多个MAC功能公共字段，所述逐个站点字段包括触发信息单独字段和MAC功能单独字段。
  12. 根据权利要求11所述的方法，其特征在于，所述逐个站点字段中触发信息单独字段和MAC功能单独字段按照每个站点来划分，或者，
    所述逐个站点字段中第一部分全部为触发信息单独字段，所述逐个站点字段中第二部分全部为MAC功能单独字段。
  13. 根据权利要求12所述的方法，其特征在于，所述携带多个MAC功能的触发帧中，所述触发信息公共字段用于指示一个或多个站点传输数据包的公共信息，所述触发信息公共字段包括以下至少一个参数：数据包的长度、保护间隔GI、带宽BW或高效长训练序列HE-LTF参数；
    所述触发信息单独字段用于指示一个或多个站点中每个站点传输数据包的单独信息，所述触发信息单独字段包括以下至少一个参数：关联标识AID或调制编码集MCS。
  14. 根据权利要求13所述的方法，其特征在于，所述触发帧还包括触发帧类型子标识，用于确定每个MAC功能字段的具体功能，所述触发类型子标识位于触发帧头、MAC功能公共字段或者触发信息公共字段。
  15. 一种无线局域网中触发帧传输的装置，其特征在于，包括：
    基带电路，用于生成触发帧，所述触发帧包括触发帧类型标识，所述触发帧类型标识用于区分不同类型的触发帧，所述不同类型的触发帧包括：不携带媒质接入控制MAC功能的触发帧、携带单个MAC功能的触发帧或携带多个MAC功能的触发帧；
    射频电路，用于发送所述触发帧。
  16. 根据权利要求15所述的装置，其特征在于，所述基带芯片生成的触发帧包括MAC功能数目标识，所述MAC功能数目标识用于指示所述触发帧携带的MAC功能数目。
  17. 根据权利要求15或16所述的装置，其特征在于，所述携带单个MAC功能的触发帧包括触发信息字段以及一个MAC功能字段；
    所述触发信息字段包括触发信息公共字段和触发信息单独字段，所述MAC功能字段包括MAC功能公共字段和MAC功能单独字段；
    所述触发信息公共字段位于所述MAC功能公共字段之前，所述触发信息单独字段位于所述MAC功能单独字段之前，所述触发信息公共字段位于所述触发信息单独字段之前。
  18. 根据权利要求17所述的装置，其特征在于，所述携带单个MAC功能的触发帧中，所述触发信息公共字段用于指示一个或多个站点传输数据包的公共信息，所述触发信息公共字段包括以下至少一个参数：数据包的长度、保护间隔GI、带宽BW或高效长训练序列HE-LTF参数；
    所述触发信息单独字段用于指示一个或多个站点中每个站点传输数据包的单独信息，所述触发信息单独字段包括以下至少一个参数：关联标识AID或调制编码集MCS。
  19. 根据权利要求18所述的装置，其特征在于，所述携带单个MAC功能的触发帧中的触发帧类型标识还用于确定所述MAC功能，所述MAC功能包括：探测sounding、块确认请求BAR或随机接入触发TF-R，
    或者，所述携带单个MAC功能的触发帧携带独立的帧控制字段，所述帧控制字段指示触发帧携带的MAC功能。
  20. 根据权利要求19所述的装置，其特征在于，所述携带单个MAC功能的触发帧的字段包括元素字段的形式，所述元素字段包含类型、长度和值三部分，所述携带单个MAC功能的触发帧的字段包括以下至少一个字段：所述触发信息单独字段或所述MAC功能字段。
  21. 根据权利要求15或16所述的装置，其特征在于，若所述触发帧为携带多个MAC功能的触发帧，所述触发帧包括触发信息字段以及多个MAC功能字段；
    所述触发信息字段包括触发信息公共字段和触发信息单独字段，所述多个MAC功能字段中的每个MAC功能字段包括MAC功能公共字段和MAC功能单独字段；
    所述触发信息公共字段位于所述MAC功能公共字段之前，所述触发信息单独字段位于所述MAC功能单独字段之前，所述触发信息公共字段位于所述触发信息单独字段之前。
  22. 根据权利要求21所述的装置，其特征在于，所述携带多个MAC功能的触发帧中，所述触发信息公共字段用于指示一个或多个站点传输数据包的公共信息，所述触发信息公共字段包括以下至少一个参数：数据包的长度、保护间隔GI、带宽BW或高效长训练序列HE-LTF参数；
    所述触发信息单独字段用于指示一个或多个站点中每个站点传输数据包的单独信息，所述触发信息单独字段包括以下至少一个参数：关联标识AID或调制编码集MCS。
  23. 根据权利要求22所述的装置，其特征在于，所述触发帧还包括触发帧类型子标识，用于确定每个MAC功能字段的具体功能，所述触发类型子标识位于触发帧头、MAC功能公共字段或者触发信息公共字段，
    或者，所述每个MAC功能字段携带独立的帧控制字段，所述帧控制字 段指示具体的MAC功能，所述MAC功能包括：探测sounding、块确认请求BAR或随机接入触发TF-R。
  24. 根据权利要求23所述的装置，其特征在于，所述携带多个MAC功能的触发帧的字段包括元素字段的形式，所述元素字段包含类型、长度和值三部分，所述携带单个MAC功能的触发帧的字段包括以下至少一个字段：所述触发信息单独字段或所述MAC功能字段。
  25. 根据权利要求15或16所述的装置，其特征在于，若所述触发帧为携带多个MAC功能的触发帧，所述触发帧包括公共信息字段以及逐个站点字段，所述公共信息字段位于所述逐个站点字段之前，所述公共信息字段包括触发信息公共字段和多个MAC功能公共字段，所述逐个站点字段包括触发信息单独字段和MAC功能单独字段。
  26. 根据权利要求25所述的装置，其特征在于，所述逐个站点字段中触发信息单独字段和MAC功能单独字段按照每个站点来划分，或者，
    所述逐个站点字段中第一部分全部为触发信息单独字段，所述逐个站点字段中第二部分全部为MAC功能单独字段。
  27. 根据权利要求26所述的装置，其特征在于，所述携带多个MAC功能的触发帧中，所述触发信息公共字段用于指示一个或多个站点传输数据包的公共信息，所述触发信息公共字段包括以下至少一个参数：数据包的长度、保护间隔GI、带宽BW或高效长训练序列HE-LTF参数；
    所述触发信息单独字段用于指示一个或多个站点中每个站点传输数据包的单独信息，所述触发信息单独字段包括以下至少一个参数：关联标识AID或调制编码集MCS。
  28. 根据权利要求27所述的装置，其特征在于，所述触发帧还包括触发帧类型子标识，用于确定每个MAC功能字段的具体功能，所述触发类型子标识位于触发帧头、MAC功能公共字段或者触发信息公共字段。
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