WO2017005049A1 - Procédé de transmission de données, dispositif d'extrémité émettrice et dispositif d'extrémité réceptrice - Google Patents

Procédé de transmission de données, dispositif d'extrémité émettrice et dispositif d'extrémité réceptrice Download PDF

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Publication number
WO2017005049A1
WO2017005049A1 PCT/CN2016/081578 CN2016081578W WO2017005049A1 WO 2017005049 A1 WO2017005049 A1 WO 2017005049A1 CN 2016081578 W CN2016081578 W CN 2016081578W WO 2017005049 A1 WO2017005049 A1 WO 2017005049A1
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bit
signaling field
field
scrambler
data
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PCT/CN2016/081578
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English (en)
Chinese (zh)
Inventor
淦明
杜振国
刘乐
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华为技术有限公司
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Publication of WO2017005049A1 publication Critical patent/WO2017005049A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a data transmission method, a transmitting end device, and a receiving end device.
  • Wireless Local Area Networks have been widely used because of their flexibility, mobility, and scalability.
  • the data field includes a Service Field, a data bit, a trailer bit, and a padding bit that is required when needed.
  • the first 16 bits of the data field are service fields.
  • the first 7 bits of the service field are Scrambler Initialization bits, which are used to synchronize with the descrambler. These bits are set to zero in order to estimate the initial state of the receiver scrambler.
  • the other 9 bits of the first 7 bits are removed from the 16-bit bits as reserved service bits (Reserved Service Bits), which is also set to zero.
  • the last 8 bits of the 9-bit service reserved bit in the service field are 8-bit Cyclic Redundancy Check (CRC) for very high throughput field B in the preamble (Very High Throughput) Signal B, VHT-SIG-B) performs calibration error detection.
  • CRC Cyclic Redundancy Check
  • VHT-SIG-B Very High Throughput Signal B
  • the CRC subfield in the service field in 802.11ac has no meaning. Therefore, the service field in the new generation WLAN system wastes the bits of the CRC subfield, and the Media Access Control (MAC) is inefficient.
  • MAC Media Access Control
  • the embodiment of the invention provides a data transmission method, a sender device and a receiver device, which can omit the service field and improve the MAC efficiency, thereby improving the throughput of the network.
  • a method of data transmission comprising:
  • the data scrambling code is performed based on the scrambler initialization bit that is jointly agreed by the transmitting end and the receiving end, and the scrambler initialization bit can replace the existing service field for the data scrambling code, thereby omitting the service field, saving The bit overhead of the service field improves the MAC efficiency and thus the throughput of the network.
  • Figure 1 is a schematic diagram of the structure of a service field.
  • FIG. 2 is a schematic structural view of a scrambler.
  • FIG. 3 is a schematic flowchart of a method for data transmission according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a data field.
  • FIG. 5 is a schematic structural diagram of an A-MPDU.
  • FIG. 6 is a schematic structural diagram of an A-MPDU subframe.
  • Figure 7 is a schematic diagram showing the structure of an MPDU separator.
  • FIG. 8 is a schematic structural diagram of an MPDU separator according to an embodiment of the present invention.
  • FIG. 9 is a schematic flowchart of a method for data transmission according to another embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of a PPDU of OFDMA.
  • FIG. 11 is a schematic structural view of a HE-SIG-B having a bandwidth of 80 MHz.
  • FIG. 12 is a schematic flowchart of a method for data transmission according to another embodiment of the present invention.
  • FIG. 13 is a schematic flowchart of a method for data transmission according to another embodiment of the present invention.
  • FIG. 14 is a schematic flowchart of a method for data transmission according to another embodiment of the present invention.
  • FIG. 15 is a schematic flowchart of a method for data transmission according to another embodiment of the present invention.
  • Figure 16 is a schematic block diagram of a transmitting device according to an embodiment of the present invention.
  • FIG. 17 is a schematic block diagram of a transmitting device according to another embodiment of the present invention.
  • FIG. 18 is a schematic block diagram of a transmitting device according to another embodiment of the present invention.
  • Figure 19 is a schematic block diagram of a sink device in accordance with one embodiment of the present invention.
  • FIG. 20 is a schematic block diagram of a receiving end device according to another embodiment of the present invention.
  • 21 is a schematic block diagram of a receiving end device according to another embodiment of the present invention.
  • FIG. 22 is a schematic block diagram of a transmitting end device according to another embodiment of the present invention.
  • FIG. 23 is a schematic block diagram of a transmitting end device according to another embodiment of the present invention.
  • FIG. 24 is a schematic block diagram of a transmitting device according to another embodiment of the present invention.
  • Figure 25 is a schematic block diagram of a receiving device in accordance with another embodiment of the present invention.
  • FIG. 26 is a schematic block diagram of a receiving end device according to another embodiment of the present invention.
  • FIG. 27 is a schematic block diagram of a receiving end device according to another embodiment of the present invention.
  • Figure 28 is a schematic flow chart of another embodiment of the present invention.
  • Figure 29 is a schematic flow chart of another embodiment of the present invention.
  • Figure 1 is a schematic diagram of the structure of a service field.
  • the service field is a 16-bit bit field.
  • the first 7 bits of the service field are scrambler initialization bits for synchronization with the descrambler.
  • the scrambler initialization bit can be set to "0" to facilitate estimation of the initial state of the receiver device scrambler.
  • the remaining 9 bits in the service field are service reserved bits and can also be set to "0".
  • the transmission order may be from low bit 0 to high bit 15.
  • the scrambler includes seven registers corresponding to X 1 , X 2 ... X 7 , respectively .
  • the sender device and the receiver device use the same generator polynomial scrambler by default.
  • the working principles are as follows:
  • Transmitter device scrambling process Each time the data packet is transmitted, the scrambler randomly selects an initial state other than 0, that is, the initial bit value corresponding to the seven registers. The scrambler loop generates 127 bits, and then XORs the continuously repeated 127-bit sequence with the input data bits to output the scrambled data bits. The scrambled data bits are finally sent out.
  • the descrambling process of the receiving device when the receiving device receives the data bit after the scrambling code, the first 7 bits of the bit data after the scrambling code and the first 7 bits of the data bit input by the scrambler are obtained by the scrambler loop. The first 7 bits of the bit sequence. Further, based on the first 7 bits of the 127-bit sequence and the generator polynomial of the scrambler, the scrambler initialization state is reversed. After obtaining the initial state of the scrambler, the receiving end may repeatedly generate 127-bit bits and XOR the data bits after scrambling, so that the original data bits before scrambling can be obtained.
  • the premise that the receiving end can correctly descramble is that the receiving end knows the first 7-bit data sequence of the scrambler input.
  • the existing method is to set the first 7-bit data sequence of the sender to a known sequence, and the values are all 0, and are placed in the service field of the data field. That is, the first 7 bits of bit data input by the scrambler are referred to as scrambler initialization bits.
  • FIG. 3 is a schematic flowchart of a method for data transmission according to an embodiment of the present invention.
  • the method shown in Figure 3 can be performed by the transmitting device.
  • a scrambler is included in the transmitting device.
  • the sender device can be an access point or a site.
  • the method shown in Figure 3 can include:
  • the scrambler initialization bit used to descramble the scrambled data is a bit agreed by the transmitting device and the receiving device, and the scrambler initializes
  • the bits are located in the Medium Access Control Protocol Data Unit MPDU delimiter of the data to be transmitted.
  • the data scrambling code is performed based on the scrambler initialization bit that is jointly agreed by the transmitting end and the receiving end, and the scrambler initialization bit can replace the existing service field for the data scrambling code, thereby omitting the service field, saving The bit overhead of the service field improves the MAC efficiency and thus the throughput of the network.
  • the scrambler initialization bit can be used to estimate the scrambler initialization state.
  • the unique bit that is commonly agreed between the transmitting device and the receiving device as the scrambler initialization bit can be used to replace the 7-bit scrambler initialization bit in the original service field. That is to say, the existing well-known bits can be used as the scrambler initialization bits instead of the service field.
  • the embodiment of the present invention does not limit the unique bit, and only needs to satisfy the fact that the transmitting end device and the receiving end device can be known.
  • the process of the scrambling code is not limited in the embodiment of the present invention.
  • the 127-bit sequence generated by continuously scrambling the scrambler as described in FIG. 2 can be scrambled by XORing the data bits.
  • the scrambler initialization bits may be located in the MPDU delimiter.
  • the scrambler initialization bit may be indicated based on bits commonly agreed by the receiving end device and the transmitting end device in the MPDU delimiter. Both well-known bits in the MPDU delimiter can be used as scrambler initialization bits.
  • the scrambler initialization bit is a bit of a signature field in the MPDU delimiter.
  • the MPDU delimiter includes a signature field, and the scrambler initialization bit can be a bit in the signature field.
  • the embodiment of the present invention does not limit the number of bits of the scrambler initialization bit, and does not limit which bits in the signature field are the scrambler initialization bits, and only needs the bit of the signature field as the scrambler initialization bit as the transmitting end.
  • the device and the receiving device are known.
  • A-MPDU Aggregate MAC Protocol Data Unit
  • MPDU Delimiter the assembled MAC layer data unit
  • MPDU Delimiter the assembled MAC layer data unit
  • PPDU physical layer convergence procedure
  • PHY Physical Layer
  • the A-MPDU technology is an optional technology in 802.11n, that is, data transmission can be transmitted in the form of a single MPDU or in the form of an A-MPDU.
  • 802.11ac the A-MPDU technology becomes the only form of data transmission, even if a single MPDU is transmitted, there is an MPDU separator in front.
  • the structure of the data field may include a service field, an A-MPDU, a tail bit, and a padding bit.
  • FIG. 5 is a schematic structural diagram of an A-MPDU. As shown in FIG. 5, one A-MPDU includes one or more A-MPDU subframes and an End of Frame pad (EOF pad) of 0-3 bytes.
  • EEF pad End of Frame pad
  • each A-MPDU subframe includes a 4-byte MPDU delimiter, a variable-byte MPDU, and a padding field, and the padding field is 0-3 bytes.
  • the front end of each A-MPDU subframe includes an MPDU delimiter.
  • FIG. 7 is a schematic diagram of the structure of the MPDU separator.
  • the MPDU delimiter in 802.11ac has a length of 32 bits, including a 1-bit EOF indication, a 1-bit reserved bit, a 14-bit MPDU length, an 8-bit CRC field, and an 8-bit signature field.
  • the signature field is set to the American Standard Code for Information Interchange (ASCII) character "N" and the corresponding bit is "01001110".
  • ASCII American Standard Code for Information Interchange
  • FIG. 8 is a schematic structural diagram of an MPDU separator according to an embodiment of the present invention.
  • the scrambler initialization bit is the first 7 bits of the signature field in the MPDU delimiter, wherein the signature field is located at the forefront of the MPDU delimiter.
  • the embodiment of the present invention can re-adjust the structure of the MPDU separator.
  • the signature field can be placed before the EOF indication bit to replace the scrambler initialization bit with 7 bits in the service field being "0", thereby eliminating the 2-byte MAC overhead of the service field.
  • the MPDU separator of the embodiment of the present invention includes a signature field, an EOF indication, a reserved bit, an MPDU length, and a CRC field.
  • the first 7 bits of the signature field are sequences known to both the transmitting device and the receiving device, so the 7-bit "0" scrambler initialization bit in the service field can be replaced as the first 7 bits of the data field.
  • the receiving device can back up the initial state of the scrambler based on the first 7 bits of the signature field, thereby obtaining a 127-bit sequence, and descrambling the received scrambled data to obtain the scrambling code. data.
  • the location of the signature field is not limited in the embodiment of the present invention.
  • the signature field may be located at the front end of the MPDU separator or may be located at other positions of the MPDU separator.
  • the 7-bit bit as the scrambler initialization bit can be any 7 bits in the signature field. At this time, only the position of the 7-bit bit and the position of the signature field in the MPDU separator are required to be agreed or known by the receiving parties.
  • the receiving end device after receiving the scrambled data, obtains a bit corresponding to the position of the 7-bit scrambler initialization bit in the 7-bit scrambler initialization bit and the scrambled data field, and obtains a 127-bit sequence corresponding to The 7 bits of the position are then inverted according to the 7-bit back-propagator state, so that a complete 127-bit sequence can be obtained, and finally the received scrambled data is descrambled.
  • the scrambler initialization bits are located in the data field and, therefore, the data to be transmitted contains scrambler initialization bits.
  • step 310 the process of the scrambling code by the transmitting device can be as follows:
  • the scrambler of the transmitting device generates a scrambler initialization state that is not all zeros
  • the 127-bit sequence is different from the data to be transmitted
  • the 7-bit scrambler initialization state of not all 0 may be generated randomly, or some bits may be randomly generated, some bits may be generated in a specified manner, or all bits may be generated in a specified manner, and the present invention is implemented.
  • the example does not limit the process of generating the initialization state.
  • the receiving device corresponding to the transmitting device will be described below in conjunction with FIG.
  • the signature field in the MPDU delimiter jointly agreed by the transmitting end and the receiving end is used as the scrambler initialization bit, the service field can be omitted, the bit overhead of the service field is saved, the MAC efficiency is improved, and the network is improved. Throughput.
  • FIG. 9 is a schematic flowchart of a method for data transmission according to another embodiment of the present invention.
  • the method shown in FIG. 9 can be performed by a transmitting device, which can include a scrambler.
  • the sender device can be an access point or a site.
  • the method shown in Figure 9 can include:
  • the bit in the high-efficiency signaling field that is jointly agreed by the transmitting end and the receiving end is used as the scrambler initialization bit, and the scrambler that uses the same scrambler initialization state is to be transmitted and the HE-SIG-B is used.
  • the service field can be omitted, the bit overhead of the service field is saved, the MAC efficiency is improved, and the throughput of the network is improved.
  • the scrambler initialization bits are located in an efficient signaling field B in the efficient signaling field.
  • the scrambler initialization bit may also be located in the high-efficiency signaling field A in the high-efficiency signaling field, which is not limited in the embodiment of the present invention.
  • the preamble portion in the existing WLAN system is described in detail below.
  • FIG. 10 is a schematic structural diagram of a PPDU of OFDMA.
  • the PPDU includes a preamble and a data field.
  • the preamble portion includes a legacy preamble and a subsequent High Efficient (HE) preamble.
  • the traditional preamble includes a Legacy Shorting Training Field (L-STF), a Legacy Long Training Field (L-LTF), and a Legacy Signal Field (L-SIG).
  • the Efficient Preamble Code includes the Rpeated Legacy Signal Field (RL-SIG), High Efficient Signal Field A (HE-SIGA), and High Efficient Signal Field B (HE-SIG). SIGB), High Efficient Shorting Training Field (HE-STF) and High Efficient Long Training Field (HE-LTF). It should be understood that multiple HE-LTFs may be included in the PPDU.
  • the data field in the PPDU is located after the preamble.
  • FIG. 11 is a schematic structural view of a HE-SIG-B having a bandwidth of 80 MHz.
  • HE-SIG-B can be divided into public parts and designated parts. As an example, HE-SIG-B Some parts can be copied every 20M, or every 20M, and the specified part of HE-SIG-B can be different for every 20M.
  • the public part of HE-SIG-B may include public parameters, such as the number and mode of HE-LTF, the guard interval used for data transmission, and may also include resource block allocation indication, site identification list, cyclic redundancy check code, and The tail bit of the convolutional code. Among them, the common parameters in the public part of HE-SIG-B can also be carried in HE-SIG-A.
  • the HE-SIG-B designated part may include each scheduled station information, and the station information may include the number of spatial streams of the station, Modulation and Coding Scheme (MCS) used for data transmission, coding type, and whether to use Time-spaced space-time code indications and whether or not to use parameters such as beamforming techniques.
  • the site information may include a resource allocation indication for the site, the site identity, a cyclic redundancy check code, and a tail bit for the convolutional code.
  • the site identifier may appear in the HE-SIG-B as an Association Identifier (AID) or a partial association identifier.
  • the site identifier may also exist as a pseudo-site identifier by XORing the portion of the information bits included.
  • the pseudo-site is identified as an information bit after XOR, such as an information bit whose site identifier is XORed with the CRC.
  • the HE-SIG-B of 80 MHz bandwidth may include division at 20 MHz.
  • the HE-SIG-B of the 80 MHz bandwidth may include four HE-SIG-B common parts.
  • the HE-SIG-B designation section may include the HE-SIG-B designation section 1, the HE-SIG-B designation section 2, the HE-SIG-B designation section 3, and the HE-SIG-B designation section 4. It can be understood that each HE-SIG-B includes a plurality of scheduled site system information.
  • the embodiment of the present invention may adopt a specific bit in the HE-SIG-B, which is a bit commonly agreed by the transmitting end device and the receiving end device.
  • the embodiment of the present invention does not limit the specific bit in the HE-SIG-B, and only needs to meet the bits agreed by the transmitting end device and the receiving end device.
  • the scrambler initialization bit is a bit of a partial basic service set identifier in the efficient signaling field B.
  • the number of bits of the scrambler initialization bit is not limited in the embodiment of the present invention.
  • it can be 7 bit bits.
  • the 7-bit bit as the scrambler initialization bit may be any 7 bits of the partial basic service set identifier of HE-GIS-B. Only the 7-bit scrambler initialization bit is required to be known to the receiving device. In this way, after receiving the scrambled HE-SIG-B, the receiving device determines the bit corresponding to the 7-bit scrambler initialization bit in the HE-SIG-B after the 7-bit scrambler initialization bit and the scrambling code.
  • the embodiment of the present invention does not limit the location of the partial basic service set identifier in the efficient signaling field B, and the position of the scrambler initialization bit in the partial basic service set identifier is not limited.
  • the receiving device only needs to know the location of the part of the basic service set identifier in the efficient signaling field B and the position of the scrambler initialization bit in the partial basic service set identifier.
  • the method shown in FIG. 9 may further include: scrambling the high-efficiency signaling field B, obtaining the scrambled high-efficiency signaling field B; and sending the scrambling code to the receiving end device. Efficient signaling field B.
  • the HE-SIG-B is scrambled according to the scrambler initialization state of the scrambler to obtain the scrambled HE-SIG-B;
  • the scrambler initialization state of the scrambler is used as a scrambler initialization state for scrambling the data to be transmitted, and scrambling is performed to obtain the data to be transmitted after scrambling;
  • the scrambled HE-SIG-B and the scrambled data to be transmitted are transmitted to the receiving device.
  • the scrambler initialization bit may be the first 7 bits of the partial basic service set identifier in the high efficiency signaling field B, where the partial basic service set identifier is located in the high efficiency signaling field B. The front end.
  • the scrambler initialization bit is the first 7 bits of the partial basic service set identifier (PBSSID) in the HE-SIG-B
  • the transmitting device may perform scrambling on the data to be transmitted according to the scrambler state of the scrambler that scrambles the HE-SIG-B to obtain scrambled data.
  • PBSSID partial basic service set identifier
  • a certain indication bit may exist in the HE-SIG-B, and the segment indication bit is a bit known by the source device and the source device.
  • the segment bit can be a Partial BSS Identifier (PBSSID).
  • PBSSID Partial BSS Identifier
  • the segment of the known indication bit may be placed in front of the HE-SIG-B, and the first 7 bits of the known indication bit of the segment are used as the scrambler initialization bits.
  • the transmitting device can scramble the HE-SIG-B using a scrambler with a random scrambler state of 0, and then scramble the data field with a scrambler of the same scrambler state.
  • the receiving end device initializes the bit through the scrambler of the first 7 bits of the HE-SIG-B, reverses the initialization state of the scrambler, and then uses the scrambler to initialize the state to continuously generate a 127 bit sequence to receive the scrambled code.
  • the subsequent HE-SIG-B and data fields are descrambled.
  • the content of the scrambling and descrambling may be the public part of HE-SIG-B, the designated part of HE-SIG-B, and the whole part of HE-SIG-B.
  • the method for scrambling the HE-SIG-B in the embodiment of the present invention is not limited.
  • a part of the basic service set identifier jointly agreed by the transmitting end and the receiving end is used as a scrambler initialization bit, and the scrambler that uses the same scrambler initialization state to be transmitted data and HE-SIG-B can Omitting the service field saves the bit overhead of the service field, improves the MAC efficiency, and improves the throughput of the network.
  • FIG. 12 is a schematic flowchart of a method for data transmission according to another embodiment of the present invention.
  • the method shown in FIG. 12 can be performed by a transmitting device including a scrambler.
  • the sender device can be an access point or a site.
  • the method shown in Figure 12 can include:
  • the data to be transmitted is scrambled to obtain the scrambled data, and the bit of the scrambler initialization state is located in the high efficiency signaling field or the received trigger.
  • the frame In the frame;
  • the data scrambling code is performed based on the scrambler initialization state jointly agreed by the transmitting end and the receiving end, and the scrambler initializing state can replace the existing service field for the data scrambling code, thereby omitting the service field, saving The bit overhead of the service field improves the MAC efficiency and thus the throughput of the network.
  • the sender device and the sink device jointly agree on the scrambler initialization state, and the service field may be omitted.
  • the use of unique bits as the scrambler initialization state can indirectly replace the scrambler initialization bits in the original service field. That is to say, the existing two-known bits can be used as the scrambler initialization state instead of the service field.
  • the embodiment of the present invention does not limit the unique bit, and only needs to satisfy the fact that the transmitting end device and the receiving end device can be known.
  • the meaning agreed by the sending end device and the receiving end device may be: a bit value of a commonly agreed scrambler initialization state.
  • the scrambler initialization state does not need to occupy a bit, and the scrambler initialization state is obtained by the receiving device by default.
  • the initialization state of the scrambler specified by the receiving party is adopted, and the scrambler initialization bit in the original service field may be indirectly replaced. That is to say, the existing agreed-upon bits can be used as the scrambler initialization state instead of the service field.
  • the embodiment of the present invention does not limit the unique bit, and only needs to satisfy the fact that the transmitting end device and the receiving end device can be known.
  • the meaning agreed by the sending end device and the receiving end device may also be: a bit position of the commonly agreed scrambler initialization state. At this time, the receiving end device needs to acquire the bit value of the scrambler initialization state from the agreed bit position.
  • the bits of the scrambler initialization state may be located in the efficient signaling field B in the efficient signaling field.
  • the bits of the scrambler initialization state may be located in the efficient signaling field A in the efficient signaling field.
  • the number of bits in the initialization state of the scrambler is not limited in the embodiment of the present invention, and the bits in the high-efficiency signaling field B of the scrambler initialization state are not limited. Only the receiving end device can obtain the bit value of the corresponding scrambler initialization state from the corresponding location.
  • the transmitting device may carry the scrambler initialization state that scrambles the data through the preamble efficient signaling field B. In this way, the receiving device receives the PPDU (including the preamble), and can obtain the scrambler initialization state.
  • the bit of the scrambler initialization state is a bit that is added by the high efficiency signaling field B.
  • bits may be added in HE-SIG-B to carry the scrambler initialization state for data scrambling.
  • the sender device scrambles the data field with the scrambler of the scrambler initialization state, and sends the data field to the receiving device.
  • the added bit may be placed in the public part of the HE-SIG-B, or may be placed in a specified part of the HE-SIG-B, and the embodiment of the present invention is not limited thereto.
  • the number of added bits may be 7 bits.
  • the number of bits in the initialization state of the scrambler is not limited in the embodiment of the present invention.
  • the embodiments of the present invention do not limit which positions in the HE-SIG-B are added bits. For example, bits can be added at the front end of HE-SIG-B to carry the scrambler initialization state.
  • the embodiment of the present invention may carry a scrambler initialization state every 20 MHz HE-SIG-B. That is to say, the scrambler of the same initialization state is used for the data field of each station within 20 MHz, and the scrambler of different initialization states is used for the data fields of the stations not within the same 20 MHz.
  • the embodiment of the present invention may also share the same scrambler initialization state for each 20 MHz HE-SIG-B, that is, the data fields of each site within 20 MHz adopt the same initialization state. Code.
  • the bits of the scrambler initialization state may be based on a site identifier or a pseudo-site identity indication in the efficient signaling field B.
  • the embodiment of the present invention may use the bit identifier agreed by the receiving party of the site identifier or the pseudo-site identifier as the scrambler initialization state. For example, use the site ID or pseudo-site to identify the first few bits.
  • the sender device e.g., the access point
  • can scramble the data field of the corresponding sink device e.g., the station
  • the receiving device After receiving the preamble of the PPDU, the receiving device (station) knows the scrambler initialization status from its corresponding site identifier or pseudo-site identifier. Therefore, the 127-bit sequence can be repeatedly generated repeatedly to descramble the received data bits after the scrambling.
  • a 6-bit bit and a 1-bit "1" combination agreed by the receiving party of the site identifier or the pseudo-site identifier may be selected.
  • the combined location is the agreed-upon location of the receiving parties.
  • the bit "1" is placed at the forefront, followed by the 6-bit bits agreed by the receiving party of the site identifier or the pseudo-site identifier to form the specified scrambler initial state. It is also possible to place the bit "1" in other agreed positions. Embodiments of the invention are not limited thereto.
  • site identifier or pseudo-site identifier is less than 6 bits, it is supplemented with the agreed “0" and "1" bits.
  • the bits of the scrambler initialization state may be based on a cyclic redundancy check code CRC indication in the efficient signaling field B.
  • the embodiment of the present invention may use the bit agreed by the receiving party in the CRC field in the HE-SIG-B as the initial state of the scrambler, such as using several bits in front of the station CRC field.
  • the CRC field in the public part of the HE-SIG-B may be used in the embodiment of the present invention, and the sender (access point) uses the scrambler to initialize the state of the scrambler to the corresponding 20 MHz bandwidth.
  • the data field of each station in the station is scrambled; optionally, as another embodiment, the embodiment of the present invention may use the CRC field in each site information in the HE-SIG-B designation part, the sending end (access point)
  • the scrambler that initializes the state with the scrambler scrambles the data field of the corresponding site.
  • the receiving end (station) After receiving the preamble of the PPDU, the receiving end (station) knows the scrambler initialization state from the corresponding CRC.
  • the 127-bit sequence can be repeatedly generated according to the scrambler initialization state, thereby descrambling the received scrambled data bits.
  • the 6-bit bit and the 1-bit "1" combination agreed by the receiving parties of the CRC field may be selected, and the combined position is agreed by the receiving parties.
  • the bit "1" is set to the front end, followed by the 6 bits agreed by the receiving parties of the CRC field to form the initial state of the specified scrambler. It is also possible to place the bit "1" in other agreed positions. This invention The embodiment is not limited to this.
  • the scrambler initialization state may be located in the received trigger frame.
  • the bit of the scrambler initialization state is a bit that is added by the high efficiency signaling field B.
  • the bits of the scrambler initialization state are based on the site identification or pseudo-site identification indication in the efficient signaling field B.
  • the bits of the scrambler initialization state are based on a cyclic redundancy check code CRC indication in the efficient signaling field B.
  • the access point sends a trigger frame, and the multi-site is triggered to transmit uplink data by using OFDMA or Multi-User Multiple-Input Multiple-Output (MU-MIMO).
  • the trigger frame has resource indication information and each scheduled station information, the block indication is similar to HE-SIG-B in the downlink OFDMA, but the trigger frame is placed after the MAC header, so the above HE-SIG-B based method The same applies to trigger based frames. That is, the initial state of the scrambler that carries the station data transmitted in the uplink OFDMA based on the trigger frame. After receiving the trigger frame, the station learns the initialization state of the scrambler, and then uses the scrambler to initialize the state to scramble the data to be transmitted.
  • MU-MIMO Multi-User Multiple-Input Multiple-Output
  • the embodiment of the present invention does not limit how the transmitting end device scrambles the trigger frame, and only needs the station to receive the trigger frame carrying the initial state of the scrambler, and can obtain the scrambler initialization state to treat The transmitted uplink data can be scrambled.
  • the trigger frame may be scrambled by using the method in which the scrambler initialization state is located in the high-efficiency signaling field in the embodiment of the present invention.
  • the scrambler initialization state may be indicated based on the added bit or site identification or pseudo-site identification or CRC field in the analog HE-SIG-B.
  • the AP descrambles the received scrambled data with the scrambler of the corresponding scrambler initial state. It should also be understood that multiple stations may correspond to one scrambler initialization state, and each station may also correspond to a scrambler initialization state.
  • FIG. 28 is a schematic flowchart of a method for transmitting an efficient signaling field B or a partially efficient signaling field B according to another embodiment of the present invention.
  • the method shown in FIG. 28 can be performed by a transmitting device, which can include a scrambler.
  • the sender device can be an access point or a site.
  • the method shown in Figure 28 can include:
  • the transmission efficient signaling field B or part of the high efficiency signaling field B is scrambled to obtain an efficient signaling field B or a partially efficient signaling field B after scrambling;
  • the scrambling coded high-efficiency signaling field B or the partially-efficient signaling field B is sent to the receiving device, where the scrambling interference is performed on the scrambled high-efficiency signaling field B or the partially-efficient signaling field B.
  • the bits of the encoder initialization state are located in the efficient signaling field or the legacy signaling field or the efficient preamble repetition signaling field.
  • site information contained in the specified part of HE-SIG-B is empty site information, such as an empty site letter. Most of the bits in the message are all 0s or all 1s. In addition, each site information contains many identical parameters, or all 0 bits or all 1 bit added at the end of the specified part will cause the bits contained in the specified part of HE-SIG-B. Too many "0" or bit "1", resulting in a Peak to Average Power Ratio (PAPR), where the empty site information contains a special AID, which is a fixed or previously passed protocol. Frame exchange conventions, such as all 0 or all 1.
  • PAPR Peak to Average Power Ratio
  • the bit in the high-efficiency signaling field that is jointly agreed by the transmitting end and the receiving end is used as the bit of the scrambler initialization state, the high-efficiency signaling field B to be transmitted or the partially-efficient signaling field B is agreed.
  • the scrambler in the initialization state performs scrambling to reduce the PAPR of the efficient signaling field B, thereby improving its robustness.
  • the transmitting device and the receiving device jointly agree to initialize the state of the HE-SIG-B or part of the HE-SIG-B scrambler. That is to say, the existing well-known bits are used as the scrambler initialization state.
  • the embodiment of the present invention does not limit the unique bit, and only needs to satisfy the fact that the transmitting end device and the receiving end device can be known.
  • the meaning agreed by the sending end device and the receiving end device may be: a bit value of a commonly agreed scrambler initialization state.
  • the scrambler initialization state does not need to occupy a bit, and the scrambler initialization state is obtained by the receiving device by default.
  • the embodiment of the present invention does not limit the unique bit, and only needs to satisfy the fact that the transmitting end device and the receiving end device can be known.
  • the meaning of the common agreement between the sending end device and the receiving end device may also be: a bit position of the commonly agreed scrambler initialization state, that is, taking the agreed bit position in the preamble field. The value above is used as the scrambler initialization state. At this time, the receiving end device needs to acquire the bit value of the scrambler initialization state from the agreed bit position.
  • the preamble portion in the next generation WLAN system is described in detail below.
  • FIG. 10 is a schematic diagram showing the structure of an OFDMA PPDU and FIG. 11 is a schematic diagram showing the structure of a HE-SIG-B having a bandwidth of 80 MHz.
  • the foregoing embodiment has briefly described the structure of the PPDU and the structure of the HE-SIG-B.
  • the HE-SIG-B can be divided into a public part and a designated part, wherein the public part is independently coded and has a CRC, and the designated part contains multiple Site information, the parameters contained in each site are not described here, and each 2 site information is encoded together and contains CRC.
  • the HE-SIG-B of 80 MHz bandwidth may include division at 20 MHz.
  • the HE-SIG-B of the 80 MHz bandwidth may include four HE-SIG-B common parts.
  • the HE-SIG-B designation section may include the HE-SIG-B designation section 1, the HE-SIG-B designation section 2, the HE-SIG-B designation section 3, and the HE-SIG-B designation section 4. It can be understood that each HE-SIG-B includes a plurality of scheduled site system information.
  • the HE-SIG-B on each of the 20 channels can be the same or different, and there is no restriction here.
  • the bits of the scrambler initialization state may be located in efficient signaling. Efficient signaling in field B in field.
  • the bits of the scrambler initialization state may be located in the efficient signaling field A in the efficient signaling field.
  • the bits of the scrambler initialization state may be located in a legacy signaling field (L-SIG) or an efficient preamble repetition signaling field (RL-SIG).
  • L-SIG legacy signaling field
  • RL-SIG efficient preamble repetition signaling field
  • the number of bits in the initialization state of the scrambler is not limited, and the initialization state of the scrambler is located in the traditional signaling field or the repeated signaling field or the high-efficiency signaling field A or the high-efficiency signaling field B. Which bits are not limited. Only the receiving end device can obtain the bit value of the corresponding scrambler initialization state from the corresponding location.
  • the transmitting device may carry the high-efficiency signaling through the physical layer preamble field in front of the preamble efficient signaling field B.
  • the scrambler initialization state in which the field B or part of the efficient signaling field B is scrambled.
  • the receiving device receives the PPDU (including the preamble), and can obtain the scrambler initialization state.
  • the bit of the scrambler initialization state may be based on the lower 6 bits of the traditional signaling field or the repeated signaling field or the 6 bits in the specified position and the 1 bit value is “1”. synthesis.
  • the bits of the scrambler initialization state may be based on the cyclic redundancy check code CRC indication in the efficient signaling field A and the efficient signaling field B.
  • the CRC field is random, thus ensuring that the scrambler initialization state is also random.
  • the embodiment of the present invention may use the bit agreed by the receiving party in the CRC field in the public part of the HE-SIG-B as the initial state of the scrambler, such as using a number of bits in front of the CRC field or a number of subsequent bits. Or all bits, using the scrambler of this initial state to scramble the specified portion of HE-SIG-B.
  • the receiving end After receiving the public part of HE-SIG-B in the preamble of the PPDU, the receiving end (station) knows the scrambler initialization state from the corresponding CRC. Further, the 127-bit sequence can be repeatedly generated according to the scrambler initialization state, thereby descrambling the HE-SIG-B designated portion after the received scrambling code.
  • the embodiment of the present invention may also use the bit agreed by the receiving party in the CRC field in the HE-SIG-A field as the initial state of the scrambler, such as using a number of bits in front of the CRC field or a number of bits or all subsequent bits.
  • the original portion of the scrambler is used to scramble the specified portion of HE-SIG-B or HE-SIG-B.
  • the receiving end After receiving the HE-SIG-A field in the preamble of the PPDU, the receiving end (station) knows the scrambler initialization state from the corresponding CRC. Further, the 127-bit sequence can be repeatedly generated according to the scrambler initialization state, thereby descrambling the HE-SIGB or HE-SIG-B designated portion after the received scrambling code.
  • the bit of the scrambler initialization state includes: 1 bit of the agreed position value of 1, the agreed i bits in the CRC field, i is at most 6, the minimum is the length of the CRC field, and the convention 6-i bits.
  • the receiving double of the CRC field may be selected.
  • the 6-bit combination and the 1-bit "1" combination agreed by the party agreement or agreement, and the combined position is agreed by the receiving parties or the agreement of the agreement.
  • the bit "1" is set to the front end, followed by the 6 bits agreed by the receiving parties of the CRC field to form the initial state of the specified scrambler. It is also possible to place the bit "1" in other agreed positions. Embodiments of the invention are not limited thereto.
  • the CRC field is less than 6 bits, it is supplemented with a well-defined "0" or "1” bit.
  • the bit of the scrambler initialization state is: 1 bit “1”
  • a bit such as a fixed 2 bit in the Bandwidth field in the HE-SIG-A field.
  • the bits of the scrambler initialization state are: 1 bit "1"
  • the initial state of the scrambler may be a sum of multiple pieces of information of the physical layer preamble field, for example: 3-bit CRC
  • the channel number can be numbered from high to low, or can be numbered from low to high. The invention is not limited.
  • HE-SIG-B specifies part of the padding bits, and null site information (such as broadcast trigger multi-site information) fills a random sequence , thereby reducing the bit "0" or "1" of the specified portion of HE-SIG-B to reduce its PAPR.
  • null site information such as broadcast trigger multi-site information
  • FIG. 29 is a schematic flowchart of a method for transmitting an efficient signaling field B or a partially efficient signaling field B according to another embodiment of the present invention.
  • the method shown in FIG. 29 can be performed by a sink device, and the sink device can include a scrambler.
  • the receiving device can be an access point or a site.
  • the method shown in Figure 29 can include:
  • the high-efficiency signaling field B or the partially efficient signaling field B scrambling code is performed based on the scrambler initialization state jointly agreed by the transmitting end and the receiving end, thereby reducing the PAPR of the high-efficiency signaling field B, and improving the robustness thereof. Sex.
  • the transmitting device and the receiving device jointly agree to initialize the state of the HE-SIG-B or part of the HE-SIG-B scrambler. That is to say, the existing well-known bits are used as the scrambler initialization state.
  • the embodiment of the present invention does not limit the unique bit, and only needs to satisfy the sending end.
  • the device and the receiving device can be known.
  • the meaning agreed by the sending end device and the receiving end device may be: a bit value of a commonly agreed scrambler initialization state.
  • the scrambler initialization state does not need to occupy a bit, and the scrambler initialization state is obtained by the receiving device by default.
  • the embodiment of the present invention does not limit the unique bit, and only needs to satisfy the fact that the transmitting end device and the receiving end device can be known.
  • the meaning of the common agreement between the sending end device and the receiving end device may also be: a bit position of the commonly agreed scrambler initialization state, that is, taking the agreed bit position in the preamble field. The value above is used as the scrambler initialization state. At this time, the receiving end device needs to acquire the bit value of the scrambler initialization state from the agreed bit position.
  • the preamble portion in the next generation WLAN system is described in detail below.
  • FIG. 10 is a schematic diagram showing the structure of an OFDMA PPDU and FIG. 11 is a schematic diagram showing the structure of a HE-SIG-B having a bandwidth of 80 MHz.
  • the foregoing embodiment has briefly described the structure of the PPDU and the structure of the HE-SIG-B.
  • the HE-SIG-B can be divided into a public part and a designated part, wherein the public part is independently coded and has a CRC, and the designated part contains multiple Site information, the parameters contained in each site are not described here, and each 2 site information is encoded together and contains CRC.
  • the HE-SIG-B of 80 MHz bandwidth may include division at 20 MHz.
  • the HE-SIG-B of the 80 MHz bandwidth may include four HE-SIG-B common parts.
  • the HE-SIG-B designation section may include the HE-SIG-B designation section 1, the HE-SIG-B designation section 2, the HE-SIG-B designation section 3, and the HE-SIG-B designation section 4. It can be understood that each HE-SIG-B includes a plurality of scheduled site system information.
  • the HE-SIG-B on each of the 20 channels may be the same or different, and is not limited herein.
  • the bits of the scrambler initialization state may be located in the efficient signaling field B in the efficient signaling field.
  • the bits of the scrambler initialization state may be located in the efficient signaling field A in the efficient signaling field.
  • the bits of the scrambler initialization state may be located in a legacy signaling field (L-SIG) or an efficient preamble including a repetition signaling field (RL-SIG).
  • L-SIG legacy signaling field
  • RL-SIG repetition signaling field
  • the number of bits in the initialization state of the scrambler is not limited, and the initialization state of the scrambler is located in the traditional signaling field or the repeated signaling field or the high-efficiency signaling field A or the high-efficiency signaling field B. Which bits are not limited. Only the receiving end device can obtain the bit value of the corresponding scrambler initialization state from the corresponding location.
  • the transmitting device may carry the high-efficiency signaling through the physical layer preamble field in front of the preamble efficient signaling field B.
  • the scrambler initialization state in which the field B or part of the efficient signaling field B is scrambled.
  • the receiving device receives the PPDU (including the preamble), and can obtain the scrambler initialization state.
  • the bit of the scrambler initialization state may be based on the lower 6 bits of the traditional signaling field or the repeated signaling field or the 6 bits in the specified position and the 1 bit value is “1”. synthesis.
  • the bits of the scrambler initialization state may be based on the cyclic redundancy check code CRC indication in the efficient signaling field A and the efficient signaling field B.
  • the CRC field is random, thus ensuring that the scrambler initialization state is also random.
  • the embodiment of the present invention may use the bit agreed by the receiving party in the CRC field in the public part of the HE-SIG-B as the initial state of the scrambler, such as using a number of bits in front of the CRC field or a number of subsequent bits. Or all bits, using the scrambler of this initial state to scramble the specified portion of HE-SIG-B.
  • the receiving end After receiving the public part of HE-SIG-B in the preamble of the PPDU, the receiving end (station) knows the scrambler initialization state from the corresponding CRC. Further, the 127-bit sequence can be repeatedly generated according to the scrambler initialization state, thereby descrambling the HE-SIG-B designated portion after the received scrambling code.
  • the embodiment of the present invention may also use the bit agreed by the receiving party in the CRC field in the HE-SIG-A field as the initial state of the scrambler, such as using a number of bits in front of the CRC field or a number of bits or all subsequent bits.
  • the original portion of the scrambler is used to scramble the specified portion of HE-SIG-B or HE-SIG-B.
  • the receiving end After receiving the HE-SIG-A field in the preamble of the PPDU, the receiving end (station) knows the scrambler initialization state from the corresponding CRC. Further, the 127-bit sequence can be repeatedly generated according to the scrambler initialization state, thereby descrambling the HE-SIGB or HE-SIG-B designated portion after the received scrambling code.
  • the 6-bit bit and the 1-bit "1" combination agreed by the receiving parties of the CRC field may be selected, and the combined position is agreed by the receiving parties.
  • the bit "1" is set to the front end, followed by the 6 bits agreed by the receiving parties of the CRC field to form the initial state of the specified scrambler. It is also possible to place the bit "1" in other agreed positions. Embodiments of the invention are not limited thereto.
  • the CRC field is less than 6 bits, it is supplemented with a well-defined "0" or "1” bit.
  • the bit of the scrambler initialization state is: 1 bit “1”
  • the bits of the scrambler initialization state are: 1 bit “1”
  • the initial state of the scrambler may be the sum of multiple information of the physical layer preamble field, for example: 3-bit CRC
  • the invention is not limited.
  • HE-SIG-B designation Part of the padding bits fills a random sequence, thereby reducing the bit "0" or "1" of the specified part of HE-SIG-B and reducing its PAPR.
  • a simple implementation is to fill a sequence of "0", "1" phases, such as "01010101" or "10101010".
  • FIG. 13 is a schematic flowchart of a method for data transmission according to another embodiment of the present invention.
  • the method shown in Figure 13 can be performed by a receiving device, which can include a descrambler.
  • the receiving device can be an access point or a site.
  • the method shown in Figure 13 can include:
  • the scrambler initialization bit used to descramble the scrambled data is a bit agreed by the transmitting device and the receiving device.
  • the scrambler initialization bit is located in the Medium Access Control Protocol Data Unit MPDU Delimiter.
  • the data scrambling code is performed based on the scrambler initialization bit that is jointly agreed by the transmitting end and the receiving end, and the scrambler initialization bit can replace the existing service field for the data scrambling code, thereby omitting the service field, saving The bit overhead of the service field improves the MAC efficiency and thus the throughput of the network.
  • the scrambler initialization bit can be used to estimate the scrambler initialization state.
  • the unique bit that is commonly agreed between the transmitting device and the receiving device as the scrambler initialization bit can be used to replace the 7-bit scrambler initialization bit in the original service field. That is to say, the existing well-known bits can be used as the scrambler initialization bits instead of the service field.
  • the embodiment of the present invention does not limit the unique bit, and only needs to satisfy the fact that the transmitting end device and the receiving end device can be known.
  • the embodiment of the present invention does not limit the process of descrambling.
  • the 127-bit sequence generated by continuously scrambling the scrambler as described in FIG. 2 may be descrambled by XORing the scrambled data bits.
  • the scrambler initialization bits may be located in the MPDU delimiter.
  • the scrambler initialization bit may be indicated based on bits commonly agreed by the receiving end device and the transmitting end device in the MPDU delimiter. Both well-known bits in the MPDU delimiter can be used as scrambler initialization bits.
  • the scrambler initialization bit is a bit of a signature field in the MPDU delimiter.
  • the MPDU delimiter includes a signature field, and the scrambler initialization bit can be a bit in the signature field.
  • the embodiment of the present invention does not limit the number of bits of the scrambler initialization bit, and does not limit which bits in the signature field are the scrambler initialization bits, and only needs the bit of the signature field as the scrambler initialization bit as the transmitting end.
  • the device and the receiving device are known.
  • the scrambler initialization bit may be the first 7 bits of the signature field in the MPDU delimiter, wherein the signature field is located at the forefront of the MPDU delimiter.
  • the description of the scrambler initialization bit based on the MPDU delimiter indication may be as described in FIG. 4-8, and to avoid repetition, it will not be described in detail herein.
  • the receiving end device in the embodiment of the present invention may correspond to the transmitting end device shown in FIG. 3.
  • the process of descrambling by the receiving device can be as follows:
  • the receiving end device When the receiving end device receives the data bit after the scrambling code, according to the scrambler initialization bit and the scrambled data, the scrambled data bit corresponding to the position of the scrambler initialization bit is obtained, and the 127-bit sequence generated by the scrambler loop is obtained. a bit in the corresponding position;
  • the 127-bit bit sequence is XORed with the scrambled data bits, so that the original data bits before scrambling can be obtained.
  • the signature field in the MPDU delimiter jointly agreed by the transmitting end and the receiving end is used as the scrambler initialization bit, the service field can be omitted, the bit overhead of the service field is saved, the MAC efficiency is improved, and the network is improved. Throughput.
  • FIG. 14 is a schematic flowchart of a method for data transmission according to another embodiment of the present invention.
  • the method shown in Figure 14 can be performed by a receiving device, which can include a descrambler.
  • the receiving device can be an access point or a site.
  • the method shown in Figure 14 can include:
  • the bit in the high-efficiency signaling field that is jointly agreed by the transmitting end and the receiving end is used as the scrambler initialization bit, and the scrambler that uses the same scrambler initialization state is to be transmitted and the HE-SIG-B is used.
  • the service field can be omitted, the bit overhead of the service field is saved, the MAC efficiency is improved, and the throughput of the network is improved.
  • the scrambler initialization bits are located in an efficient signaling field B in the efficient signaling field.
  • the scrambler initialization bit may also be located in the high-efficiency signaling field A in the high-efficiency signaling field, which is not limited in the embodiment of the present invention.
  • the scrambler initialization bit is a bit of a partial basic service set identifier in the efficient signaling field B.
  • the number of bits of the scrambler initialization bit is not limited in the embodiment of the present invention.
  • it can be 7 bit bits.
  • the 7-bit bit as the scrambler initialization bit may be any 7 bits of the partial basic service set identifier of HE-GIS-B. Only the 7-bit scrambler initialization bit is required to be known to the receiving device. In this way, after receiving the scrambled HE-SIG-B, the receiving device determines the bit corresponding to the 7-bit scrambler initialization bit in the HE-SIG-B after the 7-bit scrambler initialization bit and the scrambling code.
  • the embodiment of the present invention has a partial basic service set identifier in the efficient signaling field B.
  • the location is not limited, and the location of the scrambler initialization bits in some of the basic service set identifiers is not limited.
  • the receiving device only needs to know the location of the part of the basic service set identifier in the efficient signaling field B and the position of the scrambler initialization bit in the partial basic service set identifier.
  • the method shown in FIG. 14 may further include: receiving an scrambled high-efficiency signaling field B; determining, according to the scrambled high-efficiency signaling field B and the scrambler initialization bit, The scrambler initialization state of the scrambler that descrambles the efficient signaling field.
  • a 127-bit sequence is continuously generated, and the scrambled data is descrambled to obtain original data to be transmitted.
  • the scrambler initialization bit may be the first 7 bits of the partial basic service set identifier in the high efficiency signaling field B, where the partial basic service set identifier is located in the high efficiency signaling field B. The front end.
  • a certain indication bit may exist in the HE-SIG-B, and the segment indication bit is a bit known by the source device and the source device.
  • the segment bit can be a Partial BSS Identifier (PBSSID).
  • PBSSID Partial BSS Identifier
  • the segment of the known indication bit may be placed in front of the HE-SIG-B, and the first 7 bits of the known indication bit of the segment are used as the scrambler initialization bits.
  • the content of the scrambling and descrambling may be the public part of HE-SIG-B, the designated part of HE-SIG-B, and the whole part of HE-SIG-B.
  • the method for scrambling the HE-SIG-B in the embodiment of the present invention is not limited.
  • a part of the basic service set identifier jointly agreed by the transmitting end and the receiving end is used as a scrambler initialization bit, and the scrambler that uses the same scrambler initialization state to be transmitted data and HE-SIG-B can Omitting the service field saves the bit overhead of the service field, improves the MAC efficiency, and improves the throughput of the network.
  • FIG. 15 is a schematic flowchart of a method for data transmission according to another embodiment of the present invention.
  • the method shown in Figure 15 can be performed by a receiving device, which can include a scrambler.
  • the receiving device can be an access point or a site.
  • the method shown in Figure 15 can include:
  • the data scrambling code is performed based on the scrambler initialization state jointly agreed by the transmitting end and the receiving end, and the scrambler initializing state can replace the existing service field for the data scrambling code, thereby omitting the service field, saving The bit overhead of the service field improves the MAC efficiency and thus the throughput of the network.
  • the transmitting device and the receiving device jointly agree on the scrambler initialization state, and may also Implement the omit service field.
  • the use of unique bits as the scrambler initialization state can indirectly replace the scrambler initialization bits in the original service field. That is to say, the existing two-known bits can be used as the scrambler initialization state instead of the service field.
  • the embodiment of the present invention does not limit the unique bit, and only needs to satisfy the fact that the transmitting end device and the receiving end device can be known.
  • the meaning agreed by the sending end device and the receiving end device may be: a bit value of a commonly agreed scrambler initialization state.
  • the scrambler initialization state does not need to occupy a bit, and the scrambler initialization state is obtained by the receiving device by default.
  • the initialization state of the scrambler specified by the receiving party is adopted, and the scrambler initialization bit in the original service field may be indirectly replaced. That is to say, the existing agreed-upon bits can be used as the scrambler initialization state instead of the service field.
  • the embodiment of the present invention does not limit the unique bit, and only needs to satisfy the fact that the transmitting end device and the receiving end device can be known.
  • the meaning agreed by the sending end device and the receiving end device may also be: a bit position of the commonly agreed scrambler initialization state. At this time, the receiving end device needs to acquire the bit value of the scrambler initialization state from the agreed bit position.
  • the bits of the scrambler initialization state may be located in the efficient signaling field B in the efficient signaling field.
  • the number of bits in the initialization state of the scrambler is not limited in the embodiment of the present invention, and the bits in the high-efficiency signaling field B of the scrambler initialization state are not limited. Only the receiving end device can obtain the bit value of the corresponding scrambler initialization state from the corresponding location.
  • the transmitting device may carry the scrambler initialization state that scrambles the data through the preamble efficient signaling field B. In this way, the receiving device receives the PPDU (including the preamble), and can obtain the scrambler initialization state.
  • the bits of the scrambler initialization state are located in the efficient signaling field B in the efficient signaling field.
  • the bit of the scrambler initialization state is a bit that is added by the high efficiency signaling field B.
  • the bit of the scrambler initialization state may be 7 bits added by the front end in the efficient signaling field B.
  • 7 bits can be added in HE-SIG-B to carry the scrambler initialization state for data scrambling.
  • the receiving device can obtain the bit position corresponding to the initialization state of the scrambler, obtain the scrambler initialization state, and then descramble the scrambled data based on the scrambler initialization state.
  • the added bit may be placed in the public part of the HE-SIG-B, or may be placed in a specified part of the HE-SIG-B, and the embodiment of the present invention is not limited thereto.
  • the number of added bits may be 7 bits.
  • the number of bits in the initialization state of the scrambler is not limited in the embodiment of the present invention.
  • the embodiment of the present invention does not limit which positions in the HE-SIG-B to add bits. For example, a bit may be added at the front end of the HE-SIG-B to carry the scrambler initialization state.
  • the embodiment of the present invention may carry a scrambler initialization state every 20 MHz HE-SIG-B. In other words, use the data field for each site within 20MHz.
  • a scrambler of the same initialization state uses a differently initialized scrambler for data fields of stations that are not within the same 20 MHz.
  • the embodiment of the present invention may also share the same scrambler initialization state for each 20 MHz HE-SIG-B, that is, the data fields of each site within 20 MHz adopt the same initialization state. Code.
  • the bits of the scrambler initialization state may be based on a site identifier or a pseudo-site identity indication in the efficient signaling field B.
  • the embodiment of the present invention may use the bit identifier agreed by the receiving party of the site identifier or the pseudo-site identifier as the scrambler initialization state. For example, use the site ID or pseudo-site to identify the first few bits.
  • the sender device e.g., the access point
  • can scramble the data field of the corresponding sink device e.g., the station
  • the receiving device After receiving the preamble of the PPDU, the receiving device (station) knows the scrambler initialization status from its corresponding site identifier or pseudo-site identifier. Therefore, the 127-bit sequence can be repeatedly generated repeatedly to descramble the received data bits after the scrambling.
  • a 6-bit bit and a 1-bit "1" combination agreed by the receiving party of the site identifier or the pseudo-site identifier may be selected.
  • the combined location is the agreed-upon location of the receiving parties.
  • the bit "1" is placed at the forefront, followed by the 6-bit bits agreed by the receiving party of the site identifier or the pseudo-site identifier to form the specified scrambler initial state. It is also possible to place the bit "1" in other agreed positions. Embodiments of the invention are not limited thereto.
  • site identifier or pseudo-site identifier is less than 6 bits, it is supplemented with the agreed “0" and "1" bits.
  • the scrambler initialization state may be based on a cyclic redundancy check code CRC indication in the efficient signaling field B.
  • the embodiment of the present invention may use the bit agreed by the receiving party in the CRC field in the HE-SIG-B as the initial state of the scrambler, such as using several bits in front of the station CRC field.
  • the CRC field in the public part of the HE-SIG-B may be used in the embodiment of the present invention, and the sender (access point) uses the scrambler to initialize the state of the scrambler to the corresponding 20 MHz bandwidth.
  • the data field of each station in the station is scrambled; optionally, as another embodiment, the embodiment of the present invention may use the CRC field in each site information in the HE-SIG-B designation part, the sending end (access point)
  • the scrambler that initializes the state with the scrambler scrambles the data field of the corresponding site.
  • the receiving end (station) After receiving the preamble of the PPDU, the receiving end (station) knows the scrambler initialization state from the corresponding CRC.
  • the 127-bit sequence can be repeatedly generated according to the scrambler initialization state, thereby descrambling the received scrambled data bits.
  • the 6-bit bit and the 1-bit "1" combination agreed by the receiving parties of the CRC field may be selected, and the combined position is agreed by the receiving parties.
  • the bit "1" is set to the front end, followed by the 6 bits agreed by the receiving parties of the CRC field to form the initial state of the specified scrambler. It is also possible to place the bit "1" in other agreed positions. Embodiments of the invention are not limited thereto.
  • the scrambler initialization state may be located in a trigger frame.
  • the bit of the scrambler initialization state is a bit that is added by the high efficiency signaling field B.
  • the bits of the scrambler initialization state are based on the site identification or pseudo-site identification indication in the efficient signaling field B.
  • the bits of the scrambler initialization state are based on a cyclic redundancy check code CRC indication in the efficient signaling field B.
  • the access point sends a trigger frame, and the multi-site is triggered to transmit uplink data by using OFDMA or Multi-User Multiple-Input Multiple-Output (MU-MIMO).
  • the trigger frame has resource indication information and each scheduled station information, the block indication is similar to HE-SIG-B in the downlink OFDMA, but the trigger frame is placed after the MAC header, so the above HE-SIG-B based method The same applies to trigger based frames. That is, the initial state of the scrambler that carries the station data transmitted in the uplink OFDMA based on the trigger frame. After receiving the trigger frame, the station learns the initialization state of the scrambler, and then uses the scrambler to initialize the state to scramble the uplink data to be transmitted.
  • MU-MIMO Multi-User Multiple-Input Multiple-Output
  • the embodiment of the present invention does not limit how the transmitting end device scrambles the trigger frame, and only needs the station to receive the trigger frame carrying the initial state of the scrambler, and can obtain the scrambler initialization state to treat The transmitted uplink data can be scrambled.
  • the trigger frame may be scrambled by using the method in which the scrambler initialization state is located in the high-efficiency signaling field in the embodiment of the present invention.
  • the scrambler initialization state may be based on an added bit or site identification or pseudo-site identification or CRC field indication in HE-SIG-B.
  • the AP descrambles the received scrambled data with the scrambler of the corresponding scrambler initial state. It should also be understood that multiple stations may correspond to one scrambler initialization state, and each station may also correspond to a scrambler initialization state.
  • FIG. 16 is a schematic block diagram of a transmitting device according to an embodiment of the present invention.
  • the transmitting device shown in FIG. 16 can implement the method shown in FIG. 3. To avoid repetition, it will not be described in detail herein.
  • the transmitting device 1600 shown in FIG. 16 includes:
  • the scrambling unit 1601 scrambles the data to be transmitted, and obtains the scrambled data
  • the sending unit 1602 sends the scrambled data to the receiving end device, where the scrambler initialization bit used to descramble the scrambled data is a bit commonly agreed by the transmitting end device and the receiving end device, and the scrambler The initialization bit is located in the Medium Access Control Protocol Data Unit MPDU delimiter of the data to be transmitted.
  • the data scrambling code is performed based on the scrambler initialization bit that is jointly agreed by the transmitting end and the receiving end, and the scrambler initialization bit can replace the existing service field for the data scrambling code, thereby omitting the service field, saving The bit overhead of the service field improves the MAC efficiency and thus the throughput of the network.
  • the scrambler initialization bit is a bit of a signature field in the MPDU delimiter.
  • the scrambler initialization bit is the first 7 bits of the signature field in the MPDU delimiter, wherein the signature field is located at the forefront of the MPDU delimiter.
  • the signature field acts as a scrambler initialization bit, which can omit the service field, saves the bit overhead of the service field, improves MAC efficiency, and improves the throughput of the network.
  • FIG. 17 is a schematic block diagram of a transmitting device according to another embodiment of the present invention.
  • the transmitting device shown in FIG. 17 can implement the method shown in FIG. 9. To avoid repetition, it will not be described in detail herein.
  • the transmitting device 1700 shown in FIG. 17 includes:
  • the scrambling unit 1701 scrambles the data to be transmitted, and obtains the scrambled data
  • the sending unit 1702 sends the scrambled data to the receiving end device; wherein the scrambler initialization state of the scrambler that scrambles the data to be transmitted and the scrambler initialization of the scrambler that scrambles the high efficiency signaling field; In the same state, the scrambler initialization bits used to descramble the scrambled high efficiency signaling field are located in the efficient signaling field.
  • the bit in the high-efficiency signaling field that is jointly agreed by the transmitting end and the receiving end is used as the scrambler initialization bit, and the scrambler that uses the same scrambler initialization state is to be transmitted and the HE-SIG-B is used.
  • the service field can be omitted, the bit overhead of the service field is saved, the MAC efficiency is improved, and the throughput of the network is improved.
  • the scrambler initialization bits are located in an efficient signaling field B in the efficient signaling field.
  • the scrambler initialization bit is a bit of a partial basic service set identifier in the efficient signaling field B.
  • the scrambler initialization bit is the first 7 bits of the partial basic service set identifier, wherein the partial basic service set identifier is located at the forefront of the efficient signaling field B.
  • the scrambling unit 1701 further scrambles the high-efficiency signaling field B to obtain the scrambled high-efficiency signaling field B.
  • the sending unit 1702 also sends the scrambling code to the receiving device. Signaling field B.
  • a part of the basic service set identifier jointly agreed by the transmitting end and the receiving end is used as a scrambler initialization bit, and the scrambler that uses the same scrambler initialization state to be transmitted data and HE-SIG-B can Omitting the service field saves the bit overhead of the service field, improves the MAC efficiency, and improves the throughput of the network.
  • FIG. 18 is a schematic block diagram of a transmitting device according to another embodiment of the present invention.
  • the transmitting device shown in FIG. 18 can perform the method shown in FIG. 12. To avoid repetition, it will not be described in detail herein.
  • the transmitting device 1800 shown in FIG. 18 includes:
  • the scrambling unit 1801 scrambles the data to be transmitted according to the scrambler initialization state jointly agreed by the transmitting device and the receiving device, and obtains the scrambled data.
  • the bit of the scrambler initialization state is located in the high efficiency signaling field or received. In the trigger frame;
  • the transmitting unit 1802 transmits the scrambled data to the receiving device.
  • the data scrambling code is performed based on the scrambler initialization state jointly agreed by the transmitting end and the receiving end, and the scrambler initializing state can replace the existing service field for the data scrambling code, thereby omitting the service field, saving The bit overhead of the service field improves the MAC efficiency and thus the throughput of the network.
  • the bits of the scrambler initialization state are located in the high efficiency signaling field.
  • the efficient signaling field B In the efficient signaling field B.
  • the bit of the scrambler initialization state is a bit that is added by the high efficiency signaling field B.
  • the bits of the scrambler initialization state are based on the site identification or pseudo-site identification indication in the efficient signaling field B.
  • the bits of the scrambler initialization state are based on a cyclic redundancy check code CRC indication in the efficient signaling field B.
  • the bit of the scrambler initialization state is a bit that is added by the high efficiency signaling field B.
  • the bits of the scrambler initialization state are based on the site identification or pseudo-site identification indication in the efficient signaling field B.
  • the bits of the scrambler initialization state are based on a cyclic redundancy check code CRC indication in the efficient signaling field B.
  • FIG. 19 is a schematic block diagram of a sink device in accordance with one embodiment of the present invention.
  • the receiving device shown in FIG. 19 can execute the method shown in FIG. 13 and corresponds to the transmitting device shown in FIG. To avoid repetition, it will not be described in detail here.
  • the receiving device 1900 shown in FIG. 19 includes:
  • the receiving unit 1901 receives the scrambled data
  • the scrambled data of the descrambling unit 1902 is descrambled to obtain descrambled data; wherein the scrambler initialization bit used to descramble the scrambled data is jointly agreed by the transmitting device and the receiving device. Bit, the scrambler initialization bit is located in the Medium Access Control Protocol Data Unit MPDU Delimiter.
  • the data scrambling code is performed based on the scrambler initialization bit that is jointly agreed by the transmitting end and the receiving end, and the scrambler initialization bit can replace the existing service field for the data scrambling code, thereby omitting the service field, saving The bit overhead of the service field improves the MAC efficiency and thus the throughput of the network.
  • the scrambler initialization bit is a bit of a signature field in the MPDU delimiter.
  • the scrambler initialization bit is the first 7 bits of the signature field in the MPDU delimiter, wherein the signature field is located at the forefront of the MPDU delimiter.
  • the signature field in the MPDU delimiter jointly agreed by the transmitting end and the receiving end is used as the scrambler initialization bit, the service field can be omitted, the bit overhead of the service field is saved, the MAC efficiency is improved, and the network is improved. Throughput.
  • FIG. 20 is a schematic block diagram of a receiving end device according to another embodiment of the present invention.
  • the receiving device shown in FIG. 20 can execute the method shown in FIG. 14 and corresponds to the transmitting device shown in FIG. To avoid repetition, it will not be described in detail here.
  • the receiving device 2000 shown in FIG. 20 includes:
  • the receiving unit 2001 receives the scrambled data
  • the descrambling unit 2002 descrambles the scrambled data to obtain descrambled data; wherein the scrambler initialization state of the scrambler to descramble the data to be transmitted and the descrambling of the high-efficiency signaling field
  • the codec's scrambler has the same initialization state and is used to input the high-efficiency signaling field after the scrambling code.
  • the descrambling initialization bit of the line descrambling is located in the efficient signaling field.
  • the bit in the high-efficiency signaling field that is jointly agreed by the transmitting end and the receiving end is used as the scrambler initialization bit, and the scrambler that uses the same scrambler initialization state is to be transmitted and the HE-SIG-B is used.
  • the service field can be omitted, the bit overhead of the service field is saved, the MAC efficiency is improved, and the throughput of the network is improved.
  • the scrambler initialization bits are located in an efficient signaling field B in the efficient signaling field.
  • the scrambler initialization bit is a bit of a partial basic service set identifier in the efficient signaling field B.
  • the scrambler initialization bit is the first 7 bits of the partial basic service set identifier, wherein the partial basic service set identifier is located at the forefront of the efficient signaling field B.
  • the receiving unit 2001 further receives the scrambled high-efficiency signaling field B.
  • the receiving end device 2000 shown in FIG. 20 further includes: the high-efficiency signaling field B of the determining unit 2003 according to the scrambling code. And a scrambler initialization bit to determine a scrambler initialization state of the scrambler that descrambles the efficient signaling field.
  • the receiving device shown in FIG. 21 can execute the method shown in FIG. 15 and corresponds to the transmitting device shown in FIG. To avoid repetition, it will not be described in detail here.
  • the receiving device 2100 shown in FIG. 21 includes:
  • the receiving unit 2101 receives the data after the scrambling code
  • the descrambling unit 2102 descrambles the scrambled data according to the scrambler initialization state jointly agreed by the transmitting end device and the receiving end device, and obtains the descrambled data, and the bit of the scrambler initialization state is located in the high efficiency signaling field. Or trigger the frame.
  • the data scrambling code is performed based on the scrambler initialization state jointly agreed by the transmitting end and the receiving end, and the scrambler initializing state can replace the existing service field for the data scrambling code, thereby omitting the service field, saving The bit overhead of the service field improves the MAC efficiency and thus the throughput of the network.
  • the scrambler initialization state is located in an efficient signaling field B in the efficient signaling field.
  • the scrambler initialization state is a bit that is increased by the high efficiency signaling field B.
  • the scrambler initialization state is based on a site identifier or a pseudo-site identity indication in the efficient signaling field B.
  • the scrambler initialization state is based on a cyclic redundancy check code CRC indication in the efficient signaling field B.
  • the bit of the scrambler initialization state is a bit that is added by the high efficiency signaling field B.
  • the bits of the scrambler initialization state are based on the site identification or pseudo-site identification indication in the efficient signaling field B.
  • the bits of the scrambler initialization state are based on an efficient signaling field.
  • FIG. 22 is a schematic block diagram of a transmitting end device according to another embodiment of the present invention.
  • the transmitting device 2200 of FIG. 22 can be used to implement the steps and methods in the foregoing method embodiments.
  • the transmitting device 2200 of FIG. 22 includes a processor 2201, a memory 2202, and a transmitting circuit 2204.
  • the processor 2201, the memory 2202, and the transmitting circuit 2204 can be connected by a bus system 2209.
  • the transmitting device 2200 may further include an antenna 2205 and the like.
  • the processor 2201 controls the operation of the source device 2200.
  • the memory 2202 can include read only memory and random access memory and provides instructions and data to the processor 2201.
  • the various components of the transmitting device 2200 are coupled together by a bus system 2209, 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 2209 in the figure.
  • the processor 2201 may be an integrated circuit chip with signal processing capabilities.
  • the processor 2201 described above may be a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, or discrete hardware. Component.
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present invention may be implemented or carried out.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the processor 2201 reads the information in the memory 2202 in conjunction with the various components of its hardware sender device 2200.
  • the method of FIG. 3 can be implemented in the transmitting device 2200 of FIG. 22, and is not described in detail to avoid repetition.
  • the source device 2200 performs the following operations:
  • the scrambler initialization bit used for descrambling the scrambled data is a bit commonly agreed by the transmitting end device and the receiving end device, and the scrambler initialization bit is located in the medium access control protocol data unit MPDU of the data to be transmitted. In the separator.
  • the data scrambling code is performed based on the scrambler initialization bit that is jointly agreed by the transmitting end and the receiving end, and the scrambler initialization bit can replace the existing service field for the data scrambling code, thereby omitting the service field, saving The bit overhead of the service field improves the MAC efficiency and thus the throughput of the network.
  • the scrambler initialization bit is a bit of a signature field in the MPDU delimiter.
  • the scrambler initialization bit is the first 7 bits of the signature field in the MPDU delimiter, wherein the signature field is located at the forefront of the MPDU delimiter.
  • FIG. 23 is a schematic block diagram of a transmitting end device according to another embodiment of the present invention.
  • the transmitting device 2300 of FIG. 23 can be used to implement the steps and methods in the foregoing method embodiments.
  • the transmitting device 2300 of FIG. 23 includes a processor 2301, a memory 2302, and a transmitting circuit 2304.
  • the processor 2301, the memory 2302, and the transmitting circuit 2304 can be connected by a bus system 2309.
  • the transmitting device 2300 may further include an antenna 2305 and the like.
  • the processor 2301 controls the sending The operation of the sending device 2300.
  • the memory 2302 can include read only memory and random access memory and provides instructions and data to the processor 2301.
  • the various components of the transmitting device 2300 are coupled together by a bus system 2309 that includes, in addition to the data bus, a power bus, a control bus, and a status signal bus. However, for clarity of description, various buses are labeled as bus system 2309 in the figure.
  • the processor 2301 may be an integrated circuit chip with signal processing capabilities.
  • the processor 2301 described above may be a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, or discrete hardware. Component.
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present invention may be implemented or carried out.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the processor 2301 reads the information in the memory 2302 in conjunction with the various components of its hardware sender device 2300.
  • the method of FIG. 9 can be implemented in the transmitting device 2300 of FIG. 23, and is not described in detail to avoid repetition.
  • the source device 2300 performs the following operations:
  • the scrambler initialization state of the scrambler that performs scrambling on the transmitted data is the same as the scrambler initialization state of the scrambler that scrambles the high-efficiency signaling field, and is used for the efficient signaling field after the scrambling code.
  • the scrambler initialization bits that perform descrambling are located in the efficient signaling field.
  • the bit in the high-efficiency signaling field that is jointly agreed by the transmitting end and the receiving end is used as the scrambler initialization bit, and the scrambler that uses the same scrambler initialization state is to be transmitted and the HE-SIG-B is used.
  • the service field can be omitted, the bit overhead of the service field is saved, the MAC efficiency is improved, and the throughput of the network is improved.
  • the scrambler initialization bits are located in an efficient signaling field B in the efficient signaling field.
  • the scrambler initialization bit is a bit of a partial basic service set identifier in the efficient signaling field B.
  • the scrambler initialization bit is the first 7 bits of the partial basic service set identifier, wherein the partial basic service set identifier is located at the forefront of the efficient signaling field B.
  • the processor 2201 may further perform scrambling on the high-efficiency signaling field B to obtain a scrambled high-efficiency signaling field B.
  • the transmitting circuit 2204 may further send the scrambled code to the receiving end device. Efficient signaling field B.
  • FIG. 24 is a schematic block diagram of a transmitting device according to another embodiment of the present invention.
  • the transmitting device 2400 of FIG. 24 can be used to implement the steps and methods in the foregoing method embodiments.
  • the transmitting device 2400 of FIG. 24 includes a processor 2401, a memory 2402, and a transmitting circuit 2404.
  • the processor 2401, the memory 2402, and the transmitting circuit 2404 can be connected by a bus system 2409.
  • the transmitting device 2400 may further include an antenna 2405 and the like.
  • the processor 2401 controls the operation of the source device 2400.
  • the memory 2402 can include a read only memory and a random access memory. Instructions and data are provided to the processor 2401.
  • the various components of the transmitting device 2400 are coupled together by a bus system 2409, 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 2409 in the figure.
  • the processor 2401 may be an integrated circuit chip with signal processing capabilities.
  • the processor 2401 described above may be a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, or discrete hardware. Component.
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present invention may be implemented or carried out.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the processor 2401 reads the information in the memory 2402 in conjunction with the various components of its hardware sender device 2400.
  • the method of FIG. 12 can be implemented in the transmitting device 2400 of FIG. 24, and will not be described in detail in order to avoid redundancy.
  • the transmitting device 2400 performs the following operations:
  • the data to be transmitted is scrambled to obtain the scrambled data, and the bit of the scrambler initialization state is located in the high-efficiency signaling field or the received trigger frame.
  • the scrambled data is sent to the receiving device.
  • the data scrambling code is performed based on the scrambler initialization state jointly agreed by the transmitting end and the receiving end, and the scrambler initializing state can replace the existing service field for the data scrambling code, thereby omitting the service field, saving The bit overhead of the service field improves the MAC efficiency and thus the throughput of the network.
  • the bits of the scrambler initialization state are located in the efficient signaling field B in the efficient signaling field.
  • the bit of the scrambler initialization state is a bit that is added by the high efficiency signaling field B.
  • the bits of the scrambler initialization state are based on the site identification or pseudo-site identification indication in the efficient signaling field B.
  • the bits of the scrambler initialization state are based on a cyclic redundancy check code CRC indication in the efficient signaling field B.
  • the bit of the scrambler initialization state is a bit that is added to the trigger frame.
  • the bit of the scrambler initialization state is based on a site identifier or a pseudo-site identity indication in the trigger frame.
  • the bits of the scrambler initialization state are based on a cyclic redundancy check code CRC indication in the trigger frame.
  • FIG. 25 is a schematic block diagram of a receiving device in accordance with another embodiment of the present invention.
  • the receiving end device 2500 of FIG. 25 can be used to implement the steps and methods in the foregoing method embodiments.
  • the sink device 2500 of FIG. 25 includes a processor 2501, a memory 2502, and a sink circuit 2503.
  • the processor 2502 and the receiving circuit 2503 are connected by a bus system 2509.
  • the sink device 2500 may further include an antenna 2505 or the like.
  • the processor 2501 controls the operation of the sink device 2500.
  • the memory 2502 can include read only memory and random access memory and provides instructions and data to the processor 2501.
  • a portion of the memory 2502 can also include non-volatile line random access memory (NVRAM).
  • NVRAM non-volatile line random access memory
  • the various components of the receiving device 2500 are coupled together by a bus system 2509, 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 2509 in the figure.
  • the processor 2501 may be an integrated circuit chip with signal processing capabilities.
  • the processor 2501 described above may be a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, or discrete hardware. Component.
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present invention may be implemented or carried out.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the processor 2501 reads the information in the memory 2502 and controls the various components of the sink device 2500 in conjunction with its hardware.
  • the method of FIG. 13 can be implemented in the receiving device 2500 of FIG. 25, and will not be described in detail in order to avoid redundancy.
  • the sink device 2500 performs the following operations:
  • the scrambler initialization bit used to descramble the scrambled data is a bit commonly agreed by the transmitting end device and the receiving end device, and the scrambler initialization bit is located in the media access control protocol data unit MPDU delimiter.
  • the data scrambling code is performed based on the scrambler initialization bit that is jointly agreed by the transmitting end and the receiving end, and the scrambler initialization bit can replace the existing service field for the data scrambling code, thereby omitting the service field, saving The bit overhead of the service field improves the MAC efficiency and thus the throughput of the network.
  • the scrambler initialization bit is a bit of a signature field in the MPDU delimiter.
  • the scrambler initialization bit is the first 7 bits of the signature field in the MPDU delimiter, wherein the signature field is located at the forefront of the MPDU delimiter.
  • FIG. 26 is a schematic block diagram of a receiving end device according to another embodiment of the present invention.
  • the receiving device 2600 of FIG. 26 can be used to implement the steps and methods in the foregoing method embodiments.
  • the sink device 2600 of FIG. 26 includes a processor 2601, a memory 2602, and a sink circuit 2603.
  • the processor 2601, the memory 2602, and the receiving circuit 2603 are connected by a bus system 2609.
  • the receiving device 2600 may further include an antenna 2605 and the like.
  • the processor 2601 controls the operation of the sink device 2600.
  • the memory 2602 can include read only memory and random access memory and provides instructions and data to the processor 2601.
  • a portion of the memory 2602 can also include non-volatile line random access memory (NVRAM).
  • NVRAM non-volatile line random access memory
  • the processor 2601 may be an integrated circuit chip with signal processing capabilities.
  • the processor 2601 described above may be a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, or discrete hardware. Component.
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present invention may be implemented or carried out.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the processor 2601 reads the information in the memory 2602 and controls the various components of the receiving device 2600 in conjunction with its hardware.
  • the method of FIG. 14 can be implemented in the receiving device 2600 of FIG. 26, and will not be described in detail in order to avoid redundancy.
  • the sink device 2600 performs the following operations:
  • the scrambler initialization state of the scrambler that performs descrambling on the transmitted data is the same as the scrambler initialization state of the scrambler that descrambles the efficient signaling field, and is used for the efficient signaling field after the scrambling code.
  • the scrambler initialization bits that perform descrambling are located in the efficient signaling field.
  • the bit in the high-efficiency signaling field that is jointly agreed by the transmitting end and the receiving end is used as the scrambler initialization bit, and the scrambler that uses the same scrambler initialization state is to be transmitted and the HE-SIG-B is used.
  • the service field can be omitted, the bit overhead of the service field is saved, the MAC efficiency is improved, and the throughput of the network is improved.
  • the scrambler initialization bits are located in an efficient signaling field B in the efficient signaling field.
  • the scrambler initialization bit is a bit of a partial basic service set identifier in the efficient signaling field B.
  • the scrambler initialization bit is the first 7 bits of the partial basic service set identifier, wherein the partial basic service set identifier is located at the forefront of the efficient signaling field B.
  • the receiving circuit 2603 may further receive the scrambled high-efficiency signaling field B.
  • the processor 2601 may further determine the pair according to the scrambled high-efficiency signaling field B and the scrambler initialization bit. The scrambler initialization state of the scrambler that descrambles the efficient signaling field.
  • FIG. 27 is a schematic block diagram of a receiving end device according to another embodiment of the present invention.
  • the receiving end device 2700 of FIG. 27 can be used to implement the steps and methods in the foregoing method embodiments.
  • the sink device 2700 of FIG. 27 includes a processor 2701, a memory 2702, and a sink circuit 2703.
  • the processor 2701, the memory 2702, and the receiving circuit 2703 are connected by a bus system 2709.
  • the receiving end device 2700 may further include an antenna 2705 and the like.
  • the processor 2701 controls the operation of the sink device 2700.
  • the memory 2702 can include read only memory and random access memory and provides instructions and data to the processor 2701.
  • a portion of the memory 2702 can also include non-volatile line random access memory (NVRAM).
  • NVRAM non-volatile line random access memory
  • Each component of the receiving end device 2700 passes through the bus system 2709 are coupled together, wherein bus system 2709 includes a power bus, a control bus, and a status signal bus in addition to the data bus.
  • bus system 2709 includes a power bus, a control bus, and a status signal bus in addition to the data bus.
  • various buses are labeled as bus system 2709 in the figure.
  • the processor 2701 may be an integrated circuit chip with signal processing capabilities.
  • the processor 2701 described above may be a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, or discrete hardware. Component.
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present invention may be implemented or carried out.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the processor 2701 reads the information in the memory 2702 and controls the various components of the sink device 2700 in conjunction with its hardware.
  • the method of FIG. 15 can be implemented in the receiving device 2700 of FIG. 27, and is not described in detail to avoid repetition.
  • the sink device 2700 performs the following operations:
  • the data scrambling code is performed based on the scrambler initialization state jointly agreed by the transmitting end and the receiving end, and the scrambler initializing state can replace the existing service field for the data scrambling code, thereby omitting the service field, saving The bit overhead of the service field improves the MAC efficiency and thus the throughput of the network.
  • the bits of the scrambler initialization state are located in the efficient signaling field B in the efficient signaling field.
  • the bit of the scrambler initialization state is a bit that is added by the high efficiency signaling field B.
  • the bits of the scrambler initialization state are based on the site identification or pseudo-site identification indication in the efficient signaling field B.
  • the bits of the scrambler initialization state are based on a cyclic redundancy check code CRC indication in the efficient signaling field B.
  • the bit of the scrambler initialization state is a bit that is added by the high efficiency signaling field B.
  • the bits of the scrambler initialization state are based on the site identification or pseudo-site identification indication in the efficient signaling field B.
  • the bits of the scrambler initialization state are based on a cyclic redundancy check code CRC indication in the efficient signaling field B.
  • the size of the sequence numbers of the above processes does not mean the order of execution, and the order of execution of each process should be determined by its function and internal logic, and should not be taken to the embodiments of the present invention.
  • the implementation process constitutes any limitation.
  • system and “network” are used interchangeably herein.
  • This article The term “and/or” is merely an association describing the associated object, indicating that there may be three relationships, for example, A and / or B, which may indicate that A exists separately, A and B exist simultaneously, and B exists separately. These three situations.
  • the character "/" in this article generally indicates that the contextual object is an "or" relationship.
  • B corresponding to A means that B is associated with A, and B can be determined according to A.
  • determining B from A does not mean that B is only determined based on A, and that B can also be determined based on A and/or other information.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, or an electrical, mechanical or other form of connection.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiments of the present invention.
  • 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.
  • Computer readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another.
  • a storage medium may be any available media that can be accessed by a computer.
  • the computer readable medium may include RAM, ROM, EEPROM, CD-ROM or its His disc storage, disk storage media or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of an instruction or data structure and that can be accessed by a computer.
  • Any connection may suitably be a computer readable medium.
  • the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave
  • coaxial cable , fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, wireless, and microwave are included in the fixing of the associated media.
  • a disk and a disc include a compact disc (CD), a laser disc, a compact disc, a digital versatile disc (DVD), a floppy disk, and a Blu-ray disc, wherein the disc is usually magnetically copied, and the disc is The laser is used to optically replicate the data. Combinations of the above should also be included within the scope of the computer readable media.

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

Abstract

L'invention concerne un procédé de transmission de données, un dispositif d'extrémité émettrice et un dispositif d'extrémité réceptrice. Le procédé consiste à : brouiller les données à transmettre et obtenir des données brouillées ; et envoyer les données brouillées à un dispositif d'extrémité réceptrice, des bits d'initialisation de brouilleur permettant de désembrouiller les données brouillées correspondant à des bits désignés collectivement par un dispositif d'extrémité émettrice et un dispositif d'extrémité réceptrice, et les bits d'initialisation de brouilleur étant dans un séparateur d'unité de données de protocole MAC (MPDU) des données à transmettre. Dans les modes de réalisation de la présente invention, un brouillage de données est effectué sur la base de bits d'initialisation de brouilleur désignés collectivement par une extrémité émettrice et une extrémité réceptrice. Les bits d'initialisation de brouilleur peuvent remplacer les champs de service existants utilisés pour le brouillage de données, ce qui permet d'omettre les champs de service, de sauvegarder le surdébit de bits des champs de service, d'améliorer l'efficacité MAC, et d'améliorer ainsi le débit de réseau.
PCT/CN2016/081578 2015-07-08 2016-05-10 Procédé de transmission de données, dispositif d'extrémité émettrice et dispositif d'extrémité réceptrice WO2017005049A1 (fr)

Applications Claiming Priority (2)

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CNPCT/CN2015/083618 2015-07-08

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Cited By (1)

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CN113572571A (zh) * 2020-04-29 2021-10-29 华为技术有限公司 数据传输方法及设备、芯片系统、计算机可读存储介质

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CN102316013A (zh) * 2010-07-01 2012-01-11 杭州华三通信技术有限公司 调整最大报文长度的方法及装置
US20140301208A1 (en) * 2013-04-08 2014-10-09 Qualcomm Incorporated Systems and methods for generating and decoding short control frames in wireless communications
US20150016360A1 (en) * 2013-07-15 2015-01-15 Qualcomm Incorporated Systems and methods for a data scrambling procedure

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
CN102316013A (zh) * 2010-07-01 2012-01-11 杭州华三通信技术有限公司 调整最大报文长度的方法及装置
US20140301208A1 (en) * 2013-04-08 2014-10-09 Qualcomm Incorporated Systems and methods for generating and decoding short control frames in wireless communications
US20150016360A1 (en) * 2013-07-15 2015-01-15 Qualcomm Incorporated Systems and methods for a data scrambling procedure

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113572571A (zh) * 2020-04-29 2021-10-29 华为技术有限公司 数据传输方法及设备、芯片系统、计算机可读存储介质

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