[go: up one dir, main page]

WO2016033798A1 - Procédé de communication au sein d'un réseau local sans fil, et dispositif de communication - Google Patents

Procédé de communication au sein d'un réseau local sans fil, et dispositif de communication Download PDF

Info

Publication number
WO2016033798A1
WO2016033798A1 PCT/CN2014/086016 CN2014086016W WO2016033798A1 WO 2016033798 A1 WO2016033798 A1 WO 2016033798A1 CN 2014086016 W CN2014086016 W CN 2014086016W WO 2016033798 A1 WO2016033798 A1 WO 2016033798A1
Authority
WO
WIPO (PCT)
Prior art keywords
packet
uplink
length
access point
user
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2014/086016
Other languages
English (en)
Chinese (zh)
Inventor
刘晟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to PCT/CN2014/086016 priority Critical patent/WO2016033798A1/fr
Publication of WO2016033798A1 publication Critical patent/WO2016033798A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • Embodiments of the present invention relate to the field of communications, and, more particularly, to a communication method and communication apparatus in a wireless local area network.
  • Wireless Local Area Network (English: Wireless Local Access Network, WLAN for short) based on Orthogonal Frequency Division Multiplexing (OFDM) technology is gradually evolved from 802.11a, 802.11n, 802.11ac, etc. composition.
  • the 802.11ac version supports the downlink multi-user multiple input multiple output (English: Multiple User Multiple Input Multiple Output, MU-MIMO for short) technology.
  • MU-MIMO Multiple User Multiple Input Multiple Output
  • an access point (English: Access Point, abbreviated as AP) uses a specific downlink beam formed by precoding to simultaneously transmit corresponding sites to multiple sites (English: Station, abbreviated as STA) in the same channel. Downstream signal.
  • the STA sends a response packet (English: Acknowledgement, abbreviated as ACK) or a block response packet to the AP after a short inter-frame space (English: Short Inter-frame Space, SIFS for short). (English: Block Acknowledgement, abbreviated as BA) to indicate that it has correctly received the downlink packet (English: downlink packet).
  • ACK Acknowledgement
  • SIFS Short Inter-frame Space
  • BA Block Acknowledgement
  • a specific downlink beam is formed by precoding, so that each STA receives only the signal sent to itself and cannot receive the signal sent to other STAs, thereby causing the STA not to know the entire downlink MU- The end time of the MIMO packet.
  • the AP cannot receive the ACK/BA packet sent by the STA, causing unnecessary data retransmission. Therefore, when the lengths of the downlink packets sent to different STAs are different, the AP fills the useless bits in the Medium Access Control (MAC) layer, so that the downlink packets sent to different STAs have the same Length to avoid the aforementioned problems.
  • MAC Medium Access Control
  • Embodiments of the present invention provide a communication method and a communication device in a wireless local area network, which can reduce power loss of a STA.
  • an embodiment of the present invention provides a communication method in a wireless local area network, where the method includes:
  • the access point sends a transmission control packet to multiple sites, and the transmission control packet is used to indicate the length of the uplink packet sent by each of the multiple sites;
  • the access point receives the uplink multi-user packet from multiple sites, and the uplink multi-user packet includes the uplink packet sent by each of the multiple sites, and each uplink packet in the uplink multi-user packet does not include the padding for increasing the length of the uplink packet. Bit.
  • the transmission control packet includes an upper limit value of an uplink multi-user packet of the uplink multi-user multiple input multiple output transmission, and each uplink packet of the uplink multi-user packet The length values are all less than or equal to the upper length limit.
  • the preamble of the uplink multi-user packet received by the access point includes a length value of the uplink packet sent by each of the multiple sites.
  • the transmission control packet sent by the access point includes a length value of the uplink packet sent by each of the multiple sites.
  • the method further includes:
  • the access point determines an end time of the uplink packet sent by the first station according to the length value of the uplink packet sent by the first station in the multiple sites;
  • the gain of the receiver of the access point is increased.
  • the method further includes:
  • the access point determines an end time of the uplink packet sent by the second station according to the length value of the uplink packet sent by the second station in the multiple sites;
  • the access point stops detecting the uplink packet sent by the second station.
  • the method further includes:
  • the access point determines the sending time of sending the acknowledgement packet according to the upper limit of the length
  • the access point transmits an acknowledgment packet to one or more stations of the plurality of stations that successfully transmit the uplink packet at the time of transmission.
  • the method further includes:
  • the access point determines the maximum length of the uplink packet sent by the multiple sites according to the length value of the uplink packet sent by each of the multiple sites;
  • the access point determines, according to the maximum value of the length of the uplink packet, a sending moment of sending the acknowledgement packet
  • the access point transmits an acknowledgment packet to one or more stations of the plurality of stations that successfully transmit the uplink packet at the time of transmission.
  • an embodiment of the present invention provides a communication method in a wireless local area network, where the method includes:
  • the station receives the transmission control packet from the access point, where the transmission control packet is used to indicate the length of the uplink packet sent by each of the multiple sites of the uplink multi-user multiple input multiple output transmission corresponding to the station;
  • the station transmits an uplink packet to the access point according to the transmission control packet, and the uplink packet does not include padding bits for increasing the length of the uplink packet.
  • the transmission control packet includes an upper limit value of an uplink multi-user packet of the uplink multi-user multiple input multiple output transmission, and the length value of the uplink packet is less than or equal to the length. Limit.
  • the preamble of the uplink packet includes a length value of the uplink packet.
  • the transmission control packet includes a length value of each of the plurality of stations transmitting the uplink packet.
  • the method further includes:
  • the station determines the receiving time of the receiving acknowledgement packet according to the upper limit value of the length
  • the station receives an acknowledgment packet from the access point at the time of reception.
  • the method further includes:
  • the station determines the receiving time of receiving the acknowledgement packet according to the length of the uplink packet sent by each of the multiple sites;
  • the station receives an acknowledgment packet from the access point at the time of reception.
  • an embodiment of the present invention provides a communications apparatus, where the communications apparatus includes:
  • a sending unit configured to send a transmission control packet to the multiple sites, where the transmission control packet is used to indicate that each of the multiple sites sends the length of the uplink packet;
  • the receiving unit receives the uplink multi-user packet from multiple sites, and the uplink multi-user packet includes an uplink packet sent by each of the multiple sites, and each uplink packet in the uplink multi-user packet does not include a padding for increasing the length of the uplink packet. Bit.
  • the transmission control packet includes an upper limit value of an uplink multi-user packet of the uplink multi-user multiple input multiple output transmission, and each uplink packet of the uplink multi-user packet The length values are all less than or equal to the upper length limit.
  • the preamble of the uplink multi-user packet received by the communications device includes a length value of the uplink packet sent by each of the multiple sites.
  • the transmission control packet sent by the communications apparatus includes a length value of the uplink packet sent by each of the multiple stations.
  • the communications apparatus further includes a gain control unit,
  • the gain control unit is configured to determine an end time of the uplink packet sent by the first station according to the length value of the uplink packet sent by the first station in the multiple stations; and increase the gain of the receiver of the access point at the end time.
  • the communication device further includes a detection control unit,
  • the detection control unit is configured to determine an end time of the uplink packet sent by the second station according to the length value of the uplink packet sent by the second station in the multiple stations; and stop detecting the uplink packet sent by the second station at the end time.
  • the sending unit is further configured to: determine, according to the upper limit value of the length, the sending time of sending the acknowledgment packet; at the sending time, to the multiple sites One or more stations that successfully send an upstream packet send an acknowledgment packet.
  • the sending unit is further configured to: determine, according to the length value of the uplink packet sent by each of the multiple sites, The maximum value of the length of the uplink packet sent by the station; determining the transmission time of the transmission acknowledgement packet according to the maximum value of the length of the uplink packet; and transmitting the acknowledgement to one or more stations that successfully transmit the uplink packet to the plurality of stations at the transmission time Grouping.
  • an embodiment of the present invention provides a communications apparatus, where the communications apparatus includes:
  • a receiving unit configured to receive a transmission control packet from the access point, where the transmission control packet is used to indicate the length of the uplink packet sent by each of the multiple sites of the uplink multi-user multiple input multiple output transmission corresponding to the station;
  • a sending unit configured to send, to the access point, an uplink packet according to the transmission control packet, where the uplink packet does not include a padding bit for increasing an uplink packet length.
  • the transmission control packet includes an upper limit value of an uplink multi-user packet of the uplink multi-user multiple input multiple output transmission, and the length value of the uplink packet is less than or equal to the length. Limit.
  • the preamble of the uplink packet includes a length value of the uplink packet.
  • the transmission control packet includes a length value of each of the plurality of stations transmitting the uplink packet.
  • the receiving unit is further configured to determine, according to the upper limit value of the length, a receiving moment of the receiving acknowledgement packet; and at the receiving moment, the receiving point Receive an acknowledgment packet.
  • the receiving unit is further configured to determine, according to the length of the uplink packet sent by each of the multiple sites, the receiving moment of the receiving acknowledgement packet; At the time of reception, an acknowledgment packet is received from the access point.
  • the station in the process of uplink multi-user multiple input multiple output transmission, the station sends the uplink packet according to the length indicated by the transmission control packet, and does not need to send the uplink packet for the same length as the uplink packet sent by other STAs.
  • the padding bits of the length in turn, can reduce the power loss of the STA.
  • FIG. 1 is a schematic structural diagram of a communication system to which a communication method in a wireless local area network is applicable according to an embodiment of the present invention.
  • FIG. 2 is a schematic flow chart of a communication method in a wireless local area network according to an embodiment of the present invention.
  • FIG. 3 is a schematic flowchart of a communication method in a wireless local area network according to another embodiment of the present invention.
  • FIG. 4 is a schematic flowchart of a communication method in a wireless local area network according to another embodiment of the present invention.
  • FIG. 5 is a schematic flowchart of a communication method in a wireless local area network according to another embodiment of the present invention.
  • FIG. 6 is a schematic flowchart of a communication method in a wireless local area network according to another embodiment of the present invention.
  • Figure 7 is a schematic block diagram of a communication device in accordance with one embodiment of the present invention.
  • Figure 8 is a schematic block diagram of a communication device in accordance with one embodiment of the present invention.
  • FIG. 9 is a schematic block diagram of an access point according to another embodiment of the present invention.
  • Figure 10 is a schematic block diagram of a station in accordance with another embodiment of the present invention.
  • FIG. 11 is a schematic block diagram of an access point according to another embodiment of the present invention.
  • Figure 12 is a schematic block diagram of a station in accordance with another embodiment of the present invention.
  • the access point AP can convert the wired network into a wireless network, and provide wireless access services for the station STA.
  • the STA can be a user equipment (English: User Equipment, referred to as "UE"), a terminal (English: Terminal), a mobile station (English: Mobile Station, referred to as "MS"), a mobile terminal (English: Mobile Terminal), etc. .
  • UE User Equipment
  • MS Mobile Station
  • the STA may be a mobile phone (or "cellular" phone), a computer with a mobile terminal, or the like.
  • the STA can also be a portable, pocket, handheld, computer built-in or in-vehicle mobile device.
  • FIG. 1 is a schematic structural diagram of a communication system to which a communication method in a wireless local area network is applicable according to an embodiment of the present invention.
  • the communication system in FIG. 1 is a WLAN system, and an AP 102 with a coverage of 101 is taken as an example for description. It should be understood that the embodiment of the present invention does not make the number of APs in the WLAN system. limited.
  • the STA (103a, 103b, 103c) falls within the coverage 101 of the AP 102 and accesses the AP 102 for communication.
  • the STAs (103a, 103b, 103c) divided into the same transmission group need to fill the useless bits to be aligned to be the same. length.
  • the STAs (103a, 103b, 103c) need to transmit useless bits, a waste of the transmission power of the STAs (103a, 103b, 103c) is caused. Further, transmitting unwanted bits also increases the interference of the WLAN system.
  • the embodiments of the present invention provide a method, an AP, and an STA for uplink multi-user multiple-input multi-output MU-MIMO transmission in a wireless local area network, which can reduce the power consumption of the STA, and further reduce the interference of the WLAN system.
  • FIG. 2 is a schematic flow chart of a communication method in a wireless local area network according to an embodiment of the present invention. The method shown in FIG. 2 can be performed by the AP 102 shown in FIG. 1.
  • the access point sends a transmission control packet (English: transmission control packet), where the transmission control packet is used to indicate the length of the uplink packet sent by each of the multiple sites.
  • a transmission control packet (English: transmission control packet)
  • the transmission control packet is used to indicate the length of the uplink packet sent by each of the multiple sites.
  • the access point receives an uplink multiple user packet from multiple sites, and the uplink multi-user packet includes an uplink packet sent by each of the multiple sites (English: uplink packet), and the uplink multi-user packet
  • Each of the upstream packets does not include padding bits for increasing the length of the uplink packet.
  • the station in the process of uplink multi-user multiple input multiple output transmission, the station sends the uplink packet according to the length indicated by the transmission control packet, and does not need to send the uplink packet for the same length as the uplink packet sent by other STAs.
  • the padding bits of the length in turn, can reduce the power loss of the STA.
  • the STA does not transmit padding bits for increasing the length of the uplink packet, it is possible to avoid interference to the system due to the transmission of these padding bits.
  • the padding bit refers to a bit that does not carry any useful information added by the sender to the to-be-sent packet in the MAC layer or the physical layer in order to increase the length of the packet to be transmitted, and the receiver receives the bit.
  • the padding bits are directly discarded after the sender sends the packet containing the padding bits.
  • the padding bits according to the present invention do not include bits added for other purposes than increasing the length of the packet to be transmitted, for example, to ensure the length of the MAC layer packet is 4 8 Bits (Octet) are bits added at the MAC layer for the boundary, and bits added at the physical layer to ensure that the length of the physical layer packet is bounded by the OFDM symbol.
  • OFctet 8 Bits
  • each station may be instructed to transmit the upper limit of the length of the uplink packet.
  • the length value of the uplink packet sent by each station may also be indicated.
  • FIG. 3 is a schematic flowchart of a communication method in a wireless local area network according to another embodiment of the present invention. The method illustrated in FIG. 3 may be performed by the AP 102 illustrated in FIG. 1.
  • the access point sends a transmission control packet to multiple sites, where the transmission control packet includes an upper limit value of an uplink multi-user packet of the uplink multi-user multiple input multiple output transmission.
  • the access point AP may divide the station STA into different transmission groups according to service requirements, such as STAs (103a, 103b, 103c) in FIG.
  • STAs 103a, 103b, 103c
  • they need to send uplink packets according to the upper limit of the length of the uplink multi-user packet indicated by the transmission control packet.
  • the foregoing plurality of stations belong to the same transmission group, that is, the upper limit value of the uplink multi-user packet corresponding to the same uplink MU-MIMO transmission.
  • the uplink packets sent by the STAs in the transmission group together constitute an uplink multi-user packet, and the upper limit of the length of the uplink multi-user packet is for the entire uplink multi-user packet.
  • the transmission control packet may be sent to the STA in the same transmission group based on the downlink MU-MIMO or OFDMA technology, or may be sent to the STA in the same transmission group by means of broadcast.
  • the control packet is transmitted, or the transmission control packet is sent to each STA in the same transmission group.
  • the access point receives an uplink multi-user packet from multiple sites, where the uplink multi-user packet includes an uplink packet sent by each of the multiple sites, and each uplink packet in the uplink multi-user packet has a length value that is less than or equal to the length. Limit, each upstream packet in the uplink multi-user packet does not include padding bits for increasing the length of the uplink packet.
  • the STA may determine the length value of the uplink packet sent by itself and send the uplink packet to the AP.
  • the STA sends an uplink packet to the AP, it only needs to ensure that the length of the uplink packet is less than or equal to the upper limit of the length of the uplink multi-user packet, without It is guaranteed that the length of the uplink packet sent by itself is the same as the length of the uplink packet sent by other STAs in the uplink multi-user packet, so there is no need to transmit padding bits for increasing the length of the uplink packet. That is to say, the STA does not need to perform an action of adding a padding bit to the uplink packet in order to increase the length of the uplink packet when transmitting the uplink packet.
  • the uplink packets sent by the multiple sites respectively form an uplink multi-user packet through the uplink MU-MIMO channel
  • the AP receives the uplink multi-user packet, that is, the access point receives the uplink multi-user from multiple sites as described in the foregoing solution. Grouping.
  • the station sends an uplink packet according to the upper limit value of the length of the uplink multi-user packet received from the access point.
  • the uplink packet whose length is less than the upper limit of the length may be sent, and the padding bit for increasing the length of the uplink packet is not required to be the same as the length of the uplink packet sent by other STAs, thereby reducing the STA. Power consumption.
  • the STA does not transmit padding bits for increasing the length of the uplink packet, it is possible to avoid interference to the system due to the transmission of these padding bits.
  • the upper length limit in the transmission control packet can be represented by a variety of information. For example, it may be represented by the length value of the data field in the uplink multi-user packet, or by the overall length value of the uplink multi-user packet.
  • the STA may increase the length of the preamble based on the data field to obtain the upper limit of the length of the uplink multi-user packet.
  • the preamble of the uplink multi-user packet includes a length value of the uplink packet sent by each of the multiple sites.
  • the access point may further determine the end time of the uplink packet sent by the first station according to the length value of the uplink packet sent by the first station in the multiple sites. The access point then increases the gain of the receiver of the access point at the end of the time.
  • the station transmitting the shorter uplink packets ends the transmission of the uplink packets earlier.
  • the station that ends the uplink packet transmission earlier in the plurality of stations is referred to as the first station, so that the end time of the uplink packet sent by the first station falls in the process in which the access point receives the uplink multi-user packet from multiple sites.
  • the AP may improve the gain of the receiver after one or more STAs end the uplink packet transmission, thereby improving the signal-to-noise ratio of the subsequent received signal (English: Signal to Noise Ratio) , referred to as SNR).
  • the preamble of the uplink multi-user packet is for the entire uplink multi-user packet as a whole.
  • the preamble of the uplink multi-user packet includes a preamble of the uplink packet sent by each STA.
  • the AP may determine, according to the uplink packet length information, the time at which the STA ends the uplink packet transmission.
  • the AP stops the uplink reception processing for the STA, including physical layer operations such as demodulation and decoding.
  • the uplink packet of a STA ends, the average power of the AP received signal will decrease.
  • the AP can measure the average power of the currently received signal and then increase the gain of the receiver. Times. Where P in is the average received power before the end of the uplink packet of the STA, and P' in is the average received power after the end of the uplink packet of the STA.
  • the gain of the receiver refers to the amplification factor of the receiver amplifier.
  • the gain of the receiver is increased. When you double, you can increase the magnification of one of the amplifiers. Times. Or, you can also increase the multiple Assigned to multiple amplifiers to increase the overall gain of the receiver Times.
  • the preamble of the uplink multi-user packet includes a length value of the uplink packet sent by each of the multiple sites.
  • the access point may determine the end time of the uplink packet sent by the second station according to the length value of the uplink packet sent by the second station in the multiple sites. Then, at the end time, the access point stops detecting the uplink packet sent by the second station.
  • the AP may stop detecting the one or more STAs after one or more of the STAs end the uplink packet transmission, thereby reducing the complexity of the AP detection. Conducive to the improvement of subsequent detection performance.
  • the station transmitting the shorter uplink packets ends the transmission of the uplink packets earlier.
  • the station that ends the uplink packet transmission earlier in the plurality of stations is referred to as the second station, so that the end time of the uplink packet sent by the second station falls in the process in which the access point receives the uplink multi-user packet from multiple sites.
  • the second site may be the same as the first site described above, or may be different from the first site described above.
  • the preamble of the uplink multi-user packet is for the entire uplink multi-user packet as a whole.
  • the preamble of the uplink multi-user packet includes a preamble of the uplink packet sent by each STA.
  • the AP may determine, according to the uplink packet length information, the time at which the STA ends the uplink packet transmission.
  • the AP may no longer detect the signal of the STA in the MIMO detection. That is, when a certain STA ends the uplink packet transmission, the AP stops to this. The detection of STAs, thereby improving the detection performance of the AP.
  • STAs (103a, 103b, 103c) communicate with AP 102 via uplink MU-MIMO.
  • H 33 is a MIMO channel matrix used when the AP currently detects a signal
  • x 3 is a spatial stream vector formed by spatial streams of the foregoing three STAs
  • n is a noise vector
  • expressions of H 33 and x 3 are respectively as formulas ( 1) and formula (2):
  • H 32 is a MIMO channel matrix used by the STA 103c to end the uplink transmission after the AP 102 detects the signal, and the expressions of H 32 and x 2 are respectively expressed by formulas (3) and (4):
  • the AP 102 since the AP 102 does not need to estimate the spatial stream signal x 3 of the STA 103c in the MIMO detection process, the complexity of the MIMO detection may decrease, and since the spatial stream signals of the STA 103a and the STA 103b are not interfered by the spatial stream signal of the STA 103c, It is advantageous for AP 102 to improve the performance of subsequent MIMO detection.
  • the access point may further determine, according to the length upper limit, the sending moment of sending the acknowledgement packet.
  • the access point then transmits an acknowledgment packet to one or more stations in the plurality of stations that successfully transmitted the uplink packet at the time of transmission.
  • the STA can know that the transmission of the uplink packet has been completed, and the STA needs to resend the uplink packet.
  • the AP can know the end time of the entire uplink multi-user packet according to the upper limit of the length. Thus, after a short frame interval elapses after the end time, the AP transmits an acknowledgment packet to the STA that successfully transmits the uplink packet. It should be understood that the STA successfully sends an uplink packet, that is, the AP receives and successfully parses the uplink packet sent by the STA.
  • the acknowledgment packet may be sent to the STA in the uplink multi-user packet based on the downlink MU-MIMO technology or the downlink OFDMA technology, or may be sent in the form of a broadcast to the STA in the multi-user packet.
  • the acknowledgment packet is sent, or each acknowledgment packet is sent to each of the STAs in the multi-user packet.
  • the embodiments of the present invention are not limited thereto, and it should be understood that the above embodiments are all within the scope of protection of the embodiments of the present invention.
  • FIG. 4 is a schematic flowchart of a communication method in a wireless local area network according to another embodiment of the present invention. The method illustrated in FIG. 4 may be performed by the AP 102 illustrated in FIG. 1.
  • the access point sends a transmission control packet to multiple sites, where the transmission control packet is used to indicate that each of the multiple sites sends the length of the uplink packet.
  • the access point AP may divide the station STA into different transmission groups according to service requirements, such as STAs (103a, 103b, 103c) in FIG.
  • STAs 103a, 103b, 103c
  • they send uplink packets to the AP according to the same transmission control packet.
  • the foregoing plurality of stations belong to the same transmission group, that is, uplink multi-user packets corresponding to the same uplink MU-MIMO transmission.
  • the uplink packets sent by each STA in the transmission group together constitute an uplink multi-user packet.
  • the transmission control packet may be sent to the STA in the same transmission group based on the downlink MU-MIMO or OFDMA technology, or may be sent to the STA in the same transmission group by means of broadcast.
  • the control packet is transmitted, or the transmission control packet is sent to each STA in the same transmission group.
  • the access point receives an uplink multi-user packet from multiple sites, where the uplink multi-user packet includes an uplink packet sent by each of the multiple sites, and each uplink packet in the uplink multi-user packet does not include an uplink packet length.
  • the padding bits are used to
  • each STA in the foregoing transmission group transmits an uplink packet according to the length of the transmission control packet indicating that it transmits the uplink packet.
  • the action of adding padding bits to the uplink packet is not performed. That is to say, the uplink packet transmitted by the STA does not include padding bits for increasing the length of the uplink packet.
  • uplink packets sent by multiple stations respectively form an uplink through the uplink MU-MIMO channel.
  • the uplink multi-user packet the AP receives the uplink multi-user packet, that is, the access point receives the uplink multi-user packet from multiple sites as described in the foregoing scheme.
  • the station in the process of uplink multi-user multiple input multiple output transmission, the station sends the uplink packet according to the length indicated by the transmission control packet, and does not need to send the uplink packet for the same length as the uplink packet sent by other STAs.
  • the padding bits of the length in turn, can reduce the power consumption of the STA.
  • the STA does not transmit padding bits for increasing the length of the uplink packet, it is possible to avoid interference to the system due to the transmission of these padding bits.
  • the access point may further determine, according to the length of the uplink packet sent by the first station in the multiple sites, the uplink sent by the first station. The end time of the grouping. The access point then increases the gain of the receiver of the access point at the end of the time.
  • the starting times of the uplink packets sent by the respective stations are the same, so that the station transmitting the shorter uplink packets ends the transmission of the uplink packets earlier.
  • the station that ends the uplink packet transmission earlier in the plurality of stations is referred to as the first station, so that the end time of the uplink packet sent by the first station falls in the process in which the access point receives the uplink multi-user packet from multiple sites.
  • the AP may improve the gain of the receiver after one or more STAs of the STA end the uplink packet transmission, thereby improving the SNR of the subsequent reception.
  • the AP may determine the time at which the STA ends the uplink packet transmission according to the length of the uplink packet sent by each known STA.
  • the AP stops the uplink reception processing for the STA, including physical layer operations such as demodulation and decoding.
  • the uplink packet of a STA ends, the average power of the AP received signal will decrease.
  • the AP can measure the average power of the currently received signal and then increase the gain of the receiver. Times. Where P in is the average received power before the end of the uplink packet of the STA, and P' in is the average received power after the end of the uplink packet of the STA.
  • the gain of the receiver refers to the amplification factor of the receiver amplifier.
  • the gain of the receiver is increased. When you double, you can increase the magnification of one of the amplifiers. Times. Or, you can also increase the multiple Assigned to multiple amplifiers to increase the overall gain of the receiver Times.
  • the access point may further determine the length according to the length of the uplink packet sent by the second station in the multiple sites. The end time of the upstream packet sent by the second station. Then, at the end time, the access point stops detecting the uplink packet sent by the second station.
  • the AP may stop detecting the one or more STAs after one or more of the STAs end the uplink packet transmission, thereby reducing the complexity of the AP detection. Conducive to the improvement of subsequent detection performance.
  • the starting times of the uplink packets sent by the respective stations are the same, so that the station transmitting the shorter uplink packets ends the transmission of the uplink packets earlier.
  • the station that ends the uplink packet transmission earlier in the plurality of stations is referred to as the second station, so that the end time of the uplink packet sent by the second station falls in the process in which the access point receives the uplink multi-user packet from multiple sites.
  • the second site may be the same as the first site described above, or may be different from the first site described above.
  • the AP may determine the time at which the STA ends the uplink packet transmission according to the known length of the uplink packet sent by each STA.
  • the AP may no longer detect the signal of the STA in the MIMO detection. That is to say, when a certain STA ends the uplink packet transmission, the AP stops detecting the STA, thereby improving the detection performance of the AP.
  • STAs (103a, 103b, 103c) communicate with AP 102 via uplink MU-MIMO.
  • H 33 is a MIMO channel matrix used when the AP currently detects a signal
  • x 3 is a spatial stream vector formed by spatial streams of the foregoing three STAs
  • n is a noise vector
  • expressions of H 33 and x 3 are respectively as formulas ( 5) and formula (6):
  • H 32 is a MIMO channel matrix used by the STA 103c to end the uplink transmission after the AP 102 detects the signal, and the expressions of H 32 and x 2 are respectively expressed by formulas (7) and (8):
  • the AP 102 since the AP 102 does not need to estimate the spatial stream signal x 3 of the STA 103c in the MIMO detection process, the complexity of the MIMO detection may decrease, and since the spatial stream signals of the STA 103a and the STA 103b are not interfered by the spatial stream signal of the STA 103c, It is advantageous for AP 102 to improve the performance of subsequent MIMO detection.
  • the access point may determine, according to the length of the uplink packet sent by each of the multiple sites, the sending moment of sending the acknowledgement packet. .
  • the access point then transmits an acknowledgment packet to one or more stations in the plurality of stations that successfully transmitted the uplink packet at the time of transmission.
  • the access point determines the maximum length of the uplink packet sent by the multiple stations according to the length value of the uplink packet sent by each of the multiple sites.
  • the access point determines the transmission time of the transmission acknowledgement packet according to the maximum value of the length of the uplink packet.
  • the STA can know that the transmission of the uplink packet has been completed, and the STA needs to resend the uplink packet.
  • the AP can know the end time of the entire uplink multi-user packet according to the known length value of the uplink packet sent by each STA. Thus, after a short frame interval elapses after the end time, the AP transmits an acknowledgment packet to the STA that successfully transmits the uplink packet. It should be understood that the STA successfully sends an uplink packet, that is, the AP receives and successfully parses the uplink packet sent by the STA.
  • the acknowledgment packet may be sent to the STA in the uplink multi-user packet based on the downlink MU-MIMO technology or the downlink OFDMA technology, or may be sent in the form of a broadcast to the STA in the multi-user packet.
  • the acknowledgment packet is sent, or each acknowledgment packet is sent to each of the STAs in the multi-user packet.
  • the embodiments of the present invention are not limited thereto, and it should be understood that the above embodiments are all within the scope of protection of the embodiments of the present invention.
  • FIG. 5 is a schematic flowchart of a communication method in a wireless local area network according to another embodiment of the present invention.
  • the method illustrated in FIG. 5 may be performed by the STA illustrated in FIG. 1, such as STA 103a, STA 103b, or STA 103c.
  • the station receives a transmission control packet from the access point, where the transmission control packet is used to indicate that each of the multiple sites of the uplink multi-user multiple input multiple output transmission corresponding to the station sends the uplink packet. length.
  • the station sends an uplink packet to the access point according to the transmission control packet, and the uplink packet does not include a padding bit used to increase the length of the uplink packet.
  • the station in the process of uplink multi-user multiple input multiple output transmission, the station sends the uplink packet according to the length indicated by the transmission control packet, and does not need to send the uplink packet for the same length as the uplink packet sent by other STAs.
  • the padding bits of the length in turn, can reduce the power loss of the STA.
  • the STA does not transmit padding bits for increasing the length of the uplink packet, system interference caused by padding bits can be reduced.
  • the padding bit refers to a bit that does not carry any useful information added by the sender to the to-be-sent packet in the MAC layer or the physical layer in order to increase the length of the packet to be transmitted, and the receiver receives the bit.
  • the padding bits are directly discarded after the sender sends the packet containing the padding bits.
  • the padding bits of the present invention do not include bits added for other purposes than increasing the length of the packet to be transmitted, for example, to ensure that the length of the MAC layer packet is bounded by four octets at the MAC.
  • each station may be instructed to transmit the upper limit of the length of the uplink packet.
  • the length value of the uplink packet sent by each station may also be indicated.
  • FIG. 6 is a schematic flowchart of a communication method in a wireless local area network according to another embodiment of the present invention.
  • the method illustrated in FIG. 6 may be performed by the STA illustrated in FIG. 1, such as STA 103a, STA 103b, or STA 103c.
  • the station receives a transmission control packet from the access point, where the transmission control packet includes an upper limit value of an uplink multi-user packet of the uplink multi-user multiple input multiple output transmission corresponding to the station.
  • the access point AP may divide the station STA into different transmission groups according to service requirements, such as STAs (103a, 103b, 103c) in FIG. For STAs in the same transmission group, they need to be indicated according to the transmission control packet.
  • the upper limit of the length of the multi-user packet, and the uplink packet is transmitted.
  • the foregoing plurality of stations belong to the same transmission group, that is, the upper limit value of the uplink multi-user packet corresponding to the same uplink MU-MIMO transmission.
  • the uplink packets sent by the STAs in the transmission group together constitute an uplink multi-user packet, and the upper limit of the length of the uplink multi-user packet is for the entire uplink multi-user packet.
  • the transmission control packet may be sent to the STA in the same transmission group based on the downlink MU-MIMO or OFDMA technology, or may be sent to the STA in the same transmission group by means of broadcast.
  • the control packet is transmitted, or the transmission control packet is sent to each STA in the same transmission group.
  • the station sends an uplink packet to the access point according to the transmission control packet, where the length of the uplink packet is less than or equal to the upper limit of the length, and the uplink packet does not include the padding bit used to increase the length of the uplink packet.
  • the STA may determine the length value of the uplink packet sent by itself and send the uplink packet to the AP.
  • the STA sends an uplink packet to the AP, it only needs to ensure that the length value of the uplink packet is less than or equal to the upper limit of the length of the uplink multi-user packet, and does not need to ensure the length of the uplink packet sent by itself and other in the uplink multi-user packet.
  • the uplink packets sent by the STA have the same length, so there is no need to transmit padding bits for increasing the length of the uplink packet.
  • the STA does not need to perform an action of adding padding bits in the uplink packet in order to increase the length of the uplink packet when transmitting the uplink packet.
  • the uplink packet sent by the STA and the uplink packet sent by other stations in the same transmission group pass through the uplink MU-MIMO channel to form an uplink multi-user packet.
  • the station sends an uplink packet according to the upper limit value of the length of the uplink multi-user packet received from the access point.
  • the uplink packet whose length is less than the upper limit of the length may be sent, and the padding bit for increasing the length of the uplink packet is not required to be the same as the length of the uplink packet sent by other STAs, thereby reducing the STA. Power loss.
  • the STA does not transmit padding bits for increasing the length of the uplink packet, it is possible to avoid interference to the system due to the transmission of these padding bits.
  • the upper length limit in the transmission control packet can be represented by a variety of information. For example, it may be represented by the length value of the data field in the uplink multi-user packet, or by the overall length value of the uplink multi-user packet.
  • the STA can be in the number The length of the preamble is increased according to the field, and the upper limit of the length of the uplink multi-user packet is obtained.
  • the preamble of the uplink packet includes a length value of the uplink packet.
  • the AP can determine the length of the uplink packet sent by each station from the uplink multi-user packet.
  • the STA may also send the length information to the AP while transmitting the uplink packet to the AP.
  • the length value of the uplink packet that it sends may be carried in the preamble of the uplink packet.
  • the preambles of the uplink packets sent by the STAs together constitute the preamble of the uplink multi-user packet
  • the length values of the uplink packets sent by each station together constitute the uplink packet length information.
  • the station may further determine, according to the length upper limit, the reception time of the reception acknowledgement packet. The station then receives an acknowledgment packet from the access point at the time of reception.
  • the STA can know that the transmission of the uplink packet has been completed, and the STA needs to resend the uplink packet.
  • the AP can know the end time of the entire uplink multi-user packet according to the upper limit of the length.
  • the AP sends an acknowledgment packet to the STA.
  • the acknowledgment packet may be transmitted to the STA based on the downlink MU-MIMO technology or the downlink OFDMA technique, or the acknowledgment packet may be transmitted to the STA in the form of a broadcast, or the acknowledgment packet may be transmitted to each STA.
  • the embodiments of the present invention are not limited thereto, and it should be understood that the above embodiments are all within the scope of protection of the embodiments of the present invention.
  • the transmission control packet includes a length value of each of the plurality of stations transmitting the uplink packet.
  • the station After receiving the transmission control packet, the station transmits the uplink packet according to the length of the transmission control packet indicating that it transmits the uplink packet.
  • the communication device 70 shown in FIG. 7 includes a transmitting unit 701 and a receiving unit 702.
  • the communication device 70 can be the AP 102 shown in FIG.
  • the sending unit 701 is configured to send a transmission control packet to the multiple sites, where the transmission control packet is used to indicate that each of the multiple sites sends the length of the uplink packet.
  • the receiving unit 702 receives an uplink multi-user packet from multiple sites, and the uplink multi-user packet includes An uplink packet sent by each of the plurality of stations, each of the uplink multi-user packets does not include padding bits for increasing the length of the uplink packet.
  • the station in the process of uplink multi-user multiple input multiple output transmission, the station sends the uplink packet according to the length indicated by the transmission control packet, and does not need to send the uplink packet for the same length as the uplink packet sent by other STAs.
  • the padding bits of the length in turn, can reduce the power loss of the STA.
  • the STA does not transmit padding bits for increasing the length of the uplink packet, it is possible to avoid interference to the system due to the transmission of these padding bits.
  • the padding bit refers to a bit that does not carry any useful information added by the sender to the to-be-sent packet in the MAC layer or the physical layer in order to increase the length of the packet to be transmitted, and the receiver receives the bit.
  • the padding bits are directly discarded after the sender sends the packet containing the padding bits.
  • the padding bits of the present invention do not include bits added for other purposes than increasing the length of the packet to be transmitted, for example, to ensure that the length of the MAC layer packet is bounded by four octets (Octet).
  • each station may be instructed to transmit the upper limit of the length of the uplink packet.
  • the length value of the uplink packet sent by each station may also be indicated.
  • the sending unit 701 is configured to send, to the multiple stations, a transmission control packet, where the transmission control packet includes an upper limit value of an uplink multi-user packet of the uplink multi-user multiple input multiple output transmission.
  • the receiving unit 702 is configured to receive an uplink multi-user packet from multiple sites, where the uplink multi-user packet includes an uplink packet sent by each of the multiple sites, and the length of each uplink packet in the uplink multi-user packet is less than or equal to the length.
  • the upper limit value, each of the uplink packets in the uplink multi-user packet does not include padding bits for increasing the length of the uplink packet.
  • the upper length limit in the transmission control packet can be represented by a variety of information. For example, it may be represented by the length value of the data field in the uplink multi-user packet, or by the overall length value of the uplink multi-user packet.
  • the STA can be in the number The length of the preamble is increased according to the field, and the upper limit of the length of the uplink multi-user packet is obtained.
  • the access point AP may divide the station STA into different transmission groups according to service requirements, such as STAs (103a, 103b, 103c) in FIG.
  • STAs 103a, 103b, 103c
  • they need to send uplink packets according to the upper limit of the length of the uplink multi-user packet indicated by the transmission control packet.
  • the foregoing plurality of stations belong to the same transmission group, that is, the upper limit value of the uplink multi-user packet corresponding to the same uplink MU-MIMO transmission.
  • the uplink packets sent by the STAs in the transmission group together constitute an uplink multi-user packet, and the upper limit of the length of the uplink multi-user packet is for the entire uplink multi-user packet.
  • the transmission control packet may be sent to the STA in the same transmission group based on the downlink MU-MIMO or OFDMA technology, or may be in the form of broadcast to the same transmission group.
  • the STA transmits a transmission control packet or separately transmits a transmission control packet to each STA in the same transmission group.
  • the STA may determine the length value of the uplink packet sent by itself and send the uplink packet to the AP.
  • the STA sends an uplink packet to the AP, it only needs to ensure that the length value of the uplink packet is less than or equal to the upper limit of the length of the uplink multi-user packet, and does not need to ensure the length of the uplink packet sent by itself and other in the uplink multi-user packet.
  • the uplink packets sent by the STA are the same length, and then the padding bits for increasing the length of the uplink packet are transmitted. That is to say, the STA does not need to perform an action of adding padding bits in the uplink packet in order to increase the length of the uplink packet when transmitting the uplink packet.
  • the uplink packets sent by the multiple sites respectively form an uplink multi-user packet through the uplink MU-MIMO channel, and the receiving unit 702 receives the uplink multi-user packet, that is, the receiving unit 702 receives the uplink from multiple sites. Multi-user grouping.
  • the station sends an uplink packet according to the upper limit value of the length of the uplink multi-user packet received from the access point.
  • the uplink packet whose length is less than the upper limit of the length may be sent, and the padding bit for increasing the length of the uplink packet is not required to be the same as the length of the uplink packet sent by other STAs, thereby reducing the STA. Power consumption.
  • the STA does not transmit padding bits for increasing the length of the uplink packet, it is possible to avoid interference to the system due to the transmission of these padding bits.
  • the preamble of the uplink multi-user packet includes a length value of the uplink packet sent by each of the plurality of stations.
  • the access point 70 also includes a gain control unit 703.
  • the gain control unit 703 is configured to determine an end time of the uplink packet sent by the first station according to the length value of the uplink packet sent by the first station in the multiple stations, and increase the gain of the receiver of the access point at the end time.
  • the gain control unit 703 may improve the gain of the receiver after one or more of the STAs end the uplink packet transmission, thereby improving the SNR of the subsequent reception.
  • the preamble of the uplink multi-user packet is for the entire uplink multi-user packet as a whole.
  • the preamble of the uplink multi-user packet includes a preamble of the uplink packet sent by each STA.
  • the gain control unit 703 can determine the timing at which the STA ends the transmission of the uplink packet based on the uplink packet length information.
  • the AP stops the uplink reception processing for the STA, including physical layer operations such as demodulation and decoding.
  • the gain control unit 703 can perform the operation of the AGC.
  • the AP can measure the average power of the currently received signal and then increase the gain of the receiver. Times. Where P in is the average received power before the end of the uplink packet of the STA, and P' in is the average received power after the end of the uplink packet of the STA.
  • the gain of the receiver refers to the amplification factor of the receiver amplifier.
  • the gain of the receiver is increased. When you double, you can increase the magnification of one of the amplifiers. Times. Or, you can also increase the multiple Assigned to multiple amplifiers to increase the overall gain of the receiver Times.
  • the uplink multi-user packet leads a length value of an uplink packet sent by each of the multiple sites.
  • Access point 70 also includes a detection control unit 704.
  • the detection control unit 704 is configured to determine an end time of the uplink packet sent by the second station according to the length value of the uplink packet sent by the second station in the multiple stations, and stop detecting the uplink packet sent by the second station at the end time.
  • the detection control unit 704 can be in After one or more STAs end the transmission of the uplink packet, the detection of the one or more STAs is stopped, thereby reducing the complexity of the AP detection and improving the subsequent detection performance.
  • the station transmitting the shorter uplink packets ends the transmission of the uplink packets earlier.
  • the station that ends the uplink packet transmission earlier in the plurality of stations is referred to as the second station, so that the end time of the uplink packet sent by the second station falls in the process in which the access point receives the uplink multi-user packet from multiple sites.
  • the second site may be the same as the first site described above, or may be different from the first site described above.
  • the preamble of the uplink multi-user packet is for the entire uplink multi-user packet as a whole.
  • the preamble of the uplink multi-user packet includes a preamble of the uplink packet sent by each STA.
  • the detection control unit 704 can determine the time at which the STA ends the transmission of the uplink packet based on the uplink packet length information.
  • the AP may no longer detect the signal of the STA in the MIMO detection. That is to say, when a certain STA ends the uplink packet transmission, the AP stops detecting the STA, thereby improving the detection performance of the AP.
  • the operation performed by the detection control unit 704 is the same as the method described in the text. To avoid repetition, details are not described herein again.
  • the sending unit 701 is further configured to determine, according to the length upper limit value, a sending moment of sending the acknowledgment packet, and successfully send one or more sites of the uplink packet to the multiple sites at the sending moment. Send a confirmation packet.
  • the STA can know that the transmission of the uplink packet has been completed, and the STA needs to resend the uplink packet.
  • the sending unit 701 can know the end time of the entire uplink multi-user packet according to the upper limit value of the length.
  • the AP transmits an acknowledgment packet to the STA that successfully transmits the uplink packet.
  • the STA successfully sends an uplink packet, that is, the AP receives and successfully parses the uplink packet sent by the STA.
  • the acknowledgment packet may be sent to the STA in the uplink multi-user packet based on the downlink MU-MIMO technology or the downlink OFDMA technology, or may be sent in the form of a broadcast to the STA in the multi-user packet.
  • the acknowledgment packet is sent, or each acknowledgment packet is sent to each of the STAs in the multi-user packet.
  • the embodiments of the present invention are not limited thereto, and it should be understood that the above embodiments are all within the scope of protection of the embodiments of the present invention.
  • the sending unit 701 is further configured to: according to the length of the uplink packet sent by each of the multiple sites, determine a sending moment of sending the acknowledgment packet, and successfully send the acknowledgment packet to the multiple sites.
  • One or more sites of the upstream packet send an acknowledgment packet.
  • the maximum value of the length of the uplink packet sent by the multiple stations may be determined according to the length value of the uplink packet sent by each of the multiple sites; and the sending time of the sending the acknowledgement packet is determined according to the maximum value of the length of the uplink packet; At the time of transmission, an acknowledgment packet is sent to one or more stations that successfully transmit the uplink packet in the plurality of stations.
  • the STA can know that the transmission of the uplink packet has been completed, and the STA needs to resend the uplink packet.
  • the sending unit 701 can learn the end time of the entire uplink multi-user packet according to the known length value of the uplink packet sent by each STA. Thus, after a short frame interval elapses after the end time, the transmitting unit 701 transmits an acknowledgment packet to the STA that successfully transmits the uplink packet. It should be understood that the STA successfully sends an uplink packet, that is, the AP receives and successfully parses the uplink packet sent by the STA.
  • the sending unit 701 sends an acknowledgment packet to the STA the acknowledgment packet may be sent to the STA in the uplink multi-user packet based on the downlink MU-MIMO technology or the downlink OFDMA technology, or may be uplinked in the multi-user packet.
  • the STA transmits an acknowledgment packet, or separately transmits an acknowledgment packet to each STA in the uplink multi-user packet.
  • the embodiments of the present invention are not limited thereto, and it should be understood that the above embodiments are all within the scope of protection of the embodiments of the present invention.
  • FIG. 8 is a schematic block diagram of a communication device in a wireless local area network according to an embodiment of the present invention.
  • the device is, for example, a site or a dedicated circuit or chip that implements related functions.
  • the communication device 80 shown in FIG. 8 includes a receiving unit 801 and a transmitting unit 802.
  • the communication device 80 may be the STA 103a, the STA 103b or the STA 103c shown in FIG. 1.
  • the receiving unit 801 is configured to receive, by the access point, a transmission control packet, where the transmission control packet is used to indicate the length of the uplink packet sent by each of the multiple sites of the uplink multi-user multiple input multiple output transmission corresponding to the station.
  • the sending unit 802 is configured to send, according to the transmission control packet, an uplink packet to the access point, where the uplink packet does not include a padding bit for increasing the length of the uplink packet.
  • the station in the process of uplink multi-user multiple input multiple output transmission, the station sends the uplink packet according to the length indicated by the transmission control packet, and does not need to send the uplink packet for the same length as the uplink packet sent by other STAs.
  • the padding bits of the length in turn, can reduce the power loss of the STA.
  • the STA does not transmit padding bits for increasing the length of the uplink packet, it is possible to avoid interference to the system due to the transmission of these padding bits.
  • the padding bit refers to a bit that does not carry any useful information added by the sender to the to-be-sent packet in the MAC layer or the physical layer in order to increase the length of the packet to be transmitted, and the receiver receives the bit.
  • the padding bits are directly discarded after the sender sends the packet containing the padding bits.
  • the padding bits of the present invention do not include bits added for other purposes than increasing the length of the packet to be transmitted, for example, to ensure that the length of the MAC layer packet is bounded by four octets at the MAC.
  • each station may be instructed to transmit the upper limit of the length of the uplink packet.
  • the length value of the uplink packet sent by each station may also be indicated.
  • the receiving unit 801 is configured to receive, by the access point, a transmission control packet, where the transmission control packet includes an upper limit value of an uplink multi-user packet of the uplink multi-user multiple input multiple output transmission corresponding to the station.
  • the sending unit 802 is configured to send, according to the transmission control packet, an uplink packet to the access point, where the length value of the uplink packet is less than or equal to the upper limit value, and the uplink packet does not include the padding bit used to increase the length of the uplink packet.
  • the access point AP may divide the station STA into different transmission groups according to service requirements, such as STAs (103a, 103b, 103c) in FIG.
  • STAs 103a, 103b, 103c
  • they need to send uplink packets according to the upper limit of the length of the uplink multi-user packet indicated by the transmission control packet.
  • the foregoing plurality of stations belong to the same transmission group, that is, the upper limit value of the uplink multi-user packet corresponding to the same uplink MU-MIMO transmission.
  • the uplink packets sent by the STAs in the transmission group together constitute an uplink multi-user packet, and the upper limit of the length of the uplink multi-user packet is for the entire uplink multi-user packet.
  • the transmission control packet may be sent to the STA in the same transmission group based on the downlink MU-MIMO or OFDMA technology, or may be sent to the STA in the same transmission group by means of broadcast.
  • the control packet is transmitted, or the transmission control packet is sent to each STA in the same transmission group.
  • the transmitting unit 802 may determine that it transmits the length value of the uplink packet and send the uplink packet to the AP.
  • the sending unit 802 sends an uplink packet to the AP, it only needs to ensure that the length value of the uplink packet is less than or equal to the upper limit value of the uplink multi-user packet, and does not need to ensure the length of the uplink packet sent by itself and the uplink multi-user packet.
  • the uplink packets sent by other STAs are the same length, and then the padding bits for increasing the length of the uplink packet are transmitted.
  • the STA does not need to perform an action of adding padding bits in the uplink packet in order to increase the length of the uplink packet when transmitting the uplink packet.
  • the uplink packet sent by the STA and the uplink packet sent by other stations in the same transmission group pass through the uplink MU-MIMO channel to form an uplink multi-user packet.
  • the station sends an uplink packet according to the upper limit value of the length of the uplink multi-user packet received from the access point.
  • the uplink packet whose length is less than the upper limit of the length may be sent, and the padding bit for increasing the length of the uplink packet is not required to be the same as the length of the uplink packet sent by other STAs, thereby reducing the STA. Power loss.
  • the STA does not transmit padding bits for increasing the length of the uplink packet, system interference caused by padding bits can be reduced.
  • the upper length limit in the transmission control packet can be represented by a variety of information. For example, it may be represented by the length value of the data field in the uplink multi-user packet, or by the overall length value of the uplink multi-user packet.
  • the STA may increase the length of the preamble based on the data field to obtain the upper limit of the length of the uplink multi-user packet.
  • the preamble of the uplink packet includes a length value of the uplink packet.
  • the AP can determine the length of the uplink packet sent by each station from the uplink multi-user packet.
  • the STA may also send the length information to the AP while transmitting the uplink packet to the AP.
  • the length value of the uplink packet that it sends may be carried in the preamble of the uplink packet.
  • the preambles of the uplink packets sent by the STAs together constitute the preamble of the uplink multi-user packet
  • the length values of the uplink packets sent by each station together constitute the uplink packet length information.
  • the receiving unit 801 is further configured to determine, according to the length upper limit value, a receiving moment of receiving the acknowledgement packet, and receive an acknowledgement packet from the access point at the receiving moment.
  • the STA can learn that the transmission of the uplink packet has been completed, otherwise the STA needs to be restarted. Send an upstream packet.
  • the receiving unit 801 can know the end time of the entire uplink multi-user packet according to the upper limit of the length. Thus, after a short frame interval elapses after the end time, the AP sends an acknowledgment packet to the STA. That is, the receiving unit 801 receives the acknowledgment packet from the AP at the end time.
  • the acknowledgment packet may be transmitted to the STA based on the downlink MU-MIMO technology or the downlink OFDMA technique, or the acknowledgment packet may be transmitted to the STA in the form of a broadcast, or the acknowledgment packet may be transmitted to each STA.
  • the embodiments of the present invention are not limited thereto, and it should be understood that the above embodiments are all within the scope of protection of the embodiments of the present invention.
  • the receiving unit 801 is further configured to determine, according to the length of the uplink packet sent by each of the multiple sites, the receiving moment of the receiving acknowledgement packet, and receive the acknowledgement packet from the access point at the receiving moment.
  • the STA can know that the transmission of the uplink packet has been completed, and the STA needs to resend the uplink packet.
  • the receiving unit 801 can send the end time of the entire uplink multi-user packet according to the length of the uplink packet sent by each station indicated by the transmission control packet.
  • the AP sends an acknowledgment packet to the STA. That is, the receiving unit 901 receives an acknowledgment packet from the AP at the end time.
  • the acknowledgment packet may be transmitted to the STA based on the downlink MU-MIMO technology or the downlink OFDMA technique, or the acknowledgment packet may be transmitted to the STA in the form of a broadcast, or the acknowledgment packet may be transmitted to each STA.
  • the embodiments of the present invention are not limited thereto, and it should be understood that the above embodiments are all within the scope of protection of the embodiments of the present invention.
  • FIG. 9 is a schematic block diagram of an access point according to another embodiment of the present invention.
  • access point 90 of Figure 9 can be used to implement the steps and methods of the above method embodiments.
  • access point 90 includes an antenna 910, a transmitter 920, a receiver 930, a processor 940, and a memory 950.
  • Processor 940 controls the operation of access point 90 and can be used to process signals.
  • Memory 950 can include read only memory and random access memory and provides instructions and data to processor 940.
  • Transmitter 920 and receiver 930 can be coupled to antenna 910.
  • the various components of access point 90 are coupled together by a bus system 960, 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 960 in the figure.
  • access point 90 can be AP 102 as shown in FIG.
  • the memory 950 can store instructions to perform the following process:
  • the uplink multi-user packet includes an uplink packet sent by each of the multiple sites, and the length of each uplink packet in the uplink multi-user packet is less than or equal to the upper limit of the length, and the uplink is more
  • Each of the uplink packets in the user packet does not include padding bits for increasing the length of the uplink packet.
  • the access point AP may divide the station STA into different transmission groups according to service requirements, such as STAs (103a, 103b, 103c) in FIG.
  • STAs 103a, 103b, 103c
  • they need to send uplink packets according to the upper limit of the length of the uplink multi-user packet indicated by the transmission control packet.
  • the foregoing plurality of stations belong to the same transmission group, that is, the upper limit value of the uplink multi-user packet corresponding to the same uplink MU-MIMO transmission.
  • the uplink packets sent by the STAs in the transmission group together constitute an uplink multi-user packet, and the upper limit of the length of the uplink multi-user packet is for the entire uplink multi-user packet.
  • the transmission control packet may be sent to the STA in the same transmission group based on the downlink MU-MIMO or OFDMA technology, or may be sent to the STA in the same transmission group by means of broadcast.
  • the control packet is transmitted, or the transmission control packet is sent to each STA in the same transmission group.
  • the STA may determine the length value of the uplink packet sent by itself and send the uplink packet to the AP.
  • the STA sends an uplink packet to the AP, it only needs to ensure that the length value of the uplink packet is less than or equal to the upper limit of the length of the uplink multi-user packet, and does not need to ensure the length of the uplink packet sent by itself and other in the uplink multi-user packet.
  • the uplink packets sent by the STA are the same length, and then the padding bits for increasing the length of the uplink packet are transmitted. That is to say, the STA does not need to perform an action of adding padding bits in the uplink packet in order to increase the length of the uplink packet when transmitting the uplink packet.
  • the uplink packets sent by the multiple sites respectively form an uplink multi-user packet after the uplink MU-MIMO channel
  • the AP receives the uplink multi-user packet, that is, the access point receives multiple uplinks from multiple sites as described in the foregoing solution.
  • User grouping
  • the station sends an uplink packet according to the upper limit value of the length of the uplink multi-user packet received from the access point.
  • the STA sends an uplink packet to the AP, it can send an uplink packet whose length is less than the upper limit of the length, without The padding bits for increasing the length of the uplink packet are transmitted in the same manner as the length of the uplink packet sent by other STAs, thereby reducing the power consumption of the STA.
  • the STA does not transmit padding bits for increasing the length of the uplink packet, it is possible to avoid interference to the system due to the transmission of these padding bits.
  • the upper length limit in the transmission control packet can be represented by a variety of information. For example, it may be represented by the length value of the data field in the uplink multi-user packet, or by the overall length value of the uplink multi-user packet.
  • the STA may increase the length of the preamble based on the data field to obtain the upper limit of the length of the uplink multi-user packet.
  • the padding bit refers to a bit that does not carry any useful information added by the sender to the to-be-sent packet in the MAC layer or the physical layer in order to increase the length of the packet to be transmitted, and the receiver receives the bit.
  • the padding bits are discarded directly after the packet sent by the sender containing the padding bits.
  • the padding bits of the present invention do not include bits added for other purposes in addition to increasing the length of the packet to be transmitted, for example, to ensure the length of the MAC layer packet by four octets (English: Octet) The bits added at the MAC layer for the boundary, and the bits added at the physical layer to ensure that the length of the physical layer packet is bounded by the OFDM symbol.
  • the memory 950 may store instructions to perform the following process:
  • the preamble of the uplink multi-user packet includes a length value of the uplink packet sent by each of the multiple sites; after transmitting the transmission control packet to the multiple sites, determining according to the length value of the uplink packet sent by the first station of the multiple sites The end time of the uplink packet sent by the first station; at the end time, the gain of the receiver of the access point is increased.
  • the station transmitting the shorter uplink packets ends the transmission of the uplink packets earlier.
  • the station that ends the uplink packet transmission earlier in the plurality of stations is referred to as the first station, so that the end time of the uplink packet sent by the first station falls in the process in which the access point receives the uplink multi-user packet from multiple sites.
  • the AP may improve the gain of the receiver after one or more STAs of the STA end the uplink packet transmission, thereby improving the SNR of the subsequent reception.
  • the preamble of the uplink multi-user packet is for the entire uplink multi-user packet as a whole.
  • the preamble of the uplink multi-user packet includes a preamble of the uplink packet sent by each STA.
  • the memory 950 can store instructions to perform the following process:
  • the preamble of the uplink multi-user packet includes the uplink packet sent by each of the multiple sites a length value; after transmitting the transmission control packet to the multiple sites, determining an end time of the uplink packet sent by the second station according to the length value of the uplink packet sent by the second station in the multiple sites; and stopping detecting the second at the end time The upstream packet sent by the site.
  • the AP may stop detecting the one or more STAs after one or more of the STAs end the uplink packet transmission, thereby reducing the complexity of the AP detection. Conducive to the improvement of subsequent detection performance.
  • the station transmitting the shorter uplink packets ends the transmission of the uplink packets earlier.
  • the station that ends the uplink packet transmission earlier in the plurality of stations is referred to as the second station, so that the end time of the uplink packet sent by the second station falls in the process in which the access point receives the uplink multi-user packet from multiple sites.
  • the second site may be the same as the first site described above, or may be different from the first site described above.
  • the preamble of the uplink multi-user packet is for the entire uplink multi-user packet as a whole.
  • the preamble of the uplink multi-user packet includes a preamble of the uplink packet sent by each STA.
  • the memory 950 may store instructions to perform the following process:
  • the transmission timing of the transmission acknowledgement packet may also be determined according to the length upper limit value. Then, at the time of transmission, an acknowledgment packet is transmitted to one or more stations that successfully transmit the uplink packet among the plurality of stations.
  • the STA can know that the transmission of the uplink packet has been completed, and the STA needs to resend the uplink packet.
  • Figure 10 is a schematic block diagram of a station in accordance with another embodiment of the present invention.
  • the station 100 of FIG. 10 can be used to implement the steps and methods in the above method embodiments.
  • station 100 includes an antenna 1010, a transmitter 1020, a receiver 1030, a processor 1040, and a memory 1050.
  • the processor 1040 controls the operation of the station 100 and can be used to process signals.
  • Memory 1050 can include read only memory and random access memory and provides instructions and data to processor 1040.
  • Transmitter 1020 and receiver 1030 can be coupled to antenna 1010.
  • the various components of the site 100 are coupled together by a bus system 1060 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 1060 in the figure.
  • the station 100 may be the STA 103a, the STA 103b or the STA 103c shown in FIG. 1.
  • the memory 1050 can store instructions to perform the following process:
  • the uplink packet is sent to the access point, the length value of the uplink packet is less than or equal to the length upper limit value, and the uplink packet does not include the padding bit used to increase the length of the uplink packet.
  • the access point AP may divide the station STA into different transmission groups according to service requirements, such as STAs (103a, 103b, 103c) in FIG.
  • STAs 103a, 103b, 103c
  • they need to send uplink packets according to the upper limit of the length of the uplink multi-user packet indicated by the transmission control packet.
  • the foregoing plurality of stations belong to the same transmission group, that is, the upper limit value of the uplink multi-user packet corresponding to the same uplink MU-MIMO transmission.
  • the uplink packets sent by the STAs in the transmission group together constitute an uplink multi-user packet, and the upper limit of the length of the uplink multi-user packet is for the entire uplink multi-user packet.
  • the transmission control packet may be sent to the STA in the same transmission group based on the downlink MU-MIMO or OFDMA technology, or may be sent to the STA in the same transmission group by means of broadcast.
  • the control packet is transmitted, or the transmission control packet is sent to each STA in the same transmission group.
  • the STA may determine the length value of the uplink packet sent by itself and send the uplink packet to the AP.
  • the STA sends an uplink packet to the AP, it only needs to ensure that the length value of the uplink packet is less than or equal to the upper limit of the length of the uplink multi-user packet, and does not need to ensure the length of the uplink packet sent by itself and other in the uplink multi-user packet.
  • the uplink packets sent by the STA are the same length, and then the padding bits for increasing the length of the uplink packet are transmitted. That is to say, the STA does not need to perform an action of adding padding bits in the uplink packet in order to increase the length of the uplink packet when transmitting the uplink packet. In this way, the uplink packet sent by the STA and the uplink packet sent by other stations in the same transmission group pass through the uplink MU-MIMO channel to form an uplink multi-user packet.
  • the station sends an uplink packet according to the upper limit value of the length of the uplink multi-user packet received from the access point.
  • the uplink packet whose length is less than the upper limit of the length may be sent, and the padding bit for increasing the length of the uplink packet is not required to be the same as the length of the uplink packet sent by other STAs, thereby reducing the STA. Power loss.
  • the STA does not transmit padding bits for increasing the length of the uplink packet, it is possible to avoid interference to the system due to the transmission of these padding bits.
  • the upper length limit in the transmission control packet can be represented by a variety of information. For example, It is represented by the length value of the data field in the uplink multi-user packet, and can also be represented by the overall length value of the uplink multi-user packet.
  • the STA may increase the length of the preamble based on the data field to obtain the upper limit of the length of the uplink multi-user packet.
  • the padding bit refers to a bit that does not carry any useful information added by the sender to the to-be-sent packet in the MAC layer or the physical layer in order to increase the length of the packet to be transmitted, and the receiver receives the bit.
  • the padding bits are discarded directly after the packet sent by the sender containing the padding bits.
  • the padding bits of the present invention do not include bits added for other purposes in addition to increasing the length of the packet to be transmitted, for example, to ensure the length of the MAC layer packet by four octets (English: Octet) The bits added at the MAC layer for the boundary, and the bits added at the physical layer to ensure that the length of the physical layer packet is bounded by the OFDM symbol.
  • the memory 1050 may also store instructions to perform the following process:
  • the preamble of the uplink packet includes the length value of the uplink packet.
  • the AP can determine the length of the uplink packet sent by each station from the uplink multi-user packet.
  • the memory 1050 may also store instructions to perform the following process:
  • an acknowledgment packet is received from the access point.
  • the STA can know that the transmission of the uplink packet has been completed, and the STA needs to resend the uplink packet.
  • FIG. 11 is a schematic block diagram of an access point according to another embodiment of the present invention.
  • access point 110 can be used to implement the steps and methods in the foregoing method embodiments.
  • access point 110 includes an antenna 1110, a transmitter 1120, a receiver 1130, a processor 1140, and a memory 1150.
  • the processor 1140 controls the operation of the access point 110 and can be used to process signals.
  • Memory 1150 can include read only memory and random access memory and provides instructions and data to processor 1140.
  • Transmitter 1120 and receiver 1130 can be coupled to antenna 1110.
  • the various components of access point 110 are coupled together by a bus system 1160, 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 1160 in the figure.
  • access point 110 can be AP 102 as described in FIG.
  • the memory 1150 can store instructions to perform the following process:
  • the transmission control packet is used to indicate that each of the plurality of stations transmits the length of the uplink packet;
  • the uplink multi-user packet is received from a plurality of stations, and the uplink multi-user packet includes an uplink packet sent by each of the plurality of stations, and each of the uplink multi-user packets does not include padding bits for increasing the length of the uplink packet.
  • the access point AP may divide the station STA into different transmission groups according to service requirements, such as STAs (103a, 103b, 103c) in FIG.
  • STAs 103a, 103b, 103c
  • they send uplink packets to the AP according to the same transmission control packet.
  • the foregoing plurality of stations belong to the same transmission group, that is, uplink multi-user packets corresponding to the same uplink MU-MIMO transmission.
  • the uplink packets sent by each STA in the transmission group together constitute an uplink multi-user packet.
  • the transmission control packet may be sent to the STA in the same transmission group based on the downlink MU-MIMO or OFDMA technology, or may be sent to the STA in the same transmission group by means of broadcast.
  • the control packet is transmitted, or the transmission control packet is sent to each STA in the same transmission group.
  • Each STA in the foregoing transmission group transmits an uplink packet according to the length of the transmission control packet indicating that it transmits the uplink packet.
  • the action of adding padding bits to the uplink packet is not performed. That is to say, the uplink packet transmitted by the STA does not include padding bits for increasing the length of the uplink packet.
  • the uplink packets sent by the multiple sites respectively form an uplink multi-user packet after the uplink MU-MIMO channel
  • the AP receives the uplink multi-user packet, that is, the access point receives multiple uplinks from multiple sites as described in the foregoing solution.
  • User grouping
  • the station in the process of uplink multi-user multiple input multiple output transmission, the station sends the uplink packet according to the length indicated by the transmission control packet, and does not need to send the uplink packet for the same length as the uplink packet sent by other STAs.
  • the padding bits of the length in turn, can reduce the power consumption of the STA.
  • the STA does not transmit padding bits for increasing the length of the uplink packet, it is possible to avoid interference to the system due to the transmission of these padding bits.
  • the padding bit according to the present invention refers to the sender in order to increase the packet to be sent.
  • the length which is added to the to-be-sent packet at the MAC layer or the physical layer, does not carry any useful information.
  • the receiver will discard the padding bit directly after receiving the packet containing the padding bit sent by the sender.
  • the padding bits of the present invention do not include bits added for other purposes in addition to increasing the length of the packet to be transmitted, for example, to ensure the length of the MAC layer packet by four octets (English: Octet) The bits added at the MAC layer for the boundary, and the bits added at the physical layer to ensure that the length of the physical layer packet is bounded by the OFDM symbol.
  • the memory 1150 may also store instructions to perform the following process:
  • the gain of the receiver of the access point is increased.
  • the starting times of the uplink packets sent by the respective stations are the same, so that the station transmitting the shorter uplink packets ends the transmission of the uplink packets earlier.
  • the station that ends the uplink packet transmission earlier in the plurality of stations is referred to as the first station, so that the end time of the uplink packet sent by the first station falls in the process in which the access point receives the uplink multi-user packet from multiple sites.
  • the AP may improve the gain of the receiver after one or more STAs of the STA end the uplink packet transmission, thereby improving the SNR of the subsequent reception.
  • the memory 1150 may also store instructions to perform the following process:
  • the detection of the uplink packet sent by the second station is stopped.
  • the AP may stop detecting the one or more STAs after one or more of the STAs end the uplink packet transmission, thereby reducing the complexity of the AP detection. Conducive to the improvement of subsequent detection performance.
  • the starting times of the uplink packets sent by the respective stations are the same, so that the station transmitting the shorter uplink packets ends the transmission of the uplink packets earlier.
  • the station that ends the uplink packet transmission earlier in the plurality of stations is referred to as the second station, so that the end time of the uplink packet sent by the second station falls in the process in which the access point receives the uplink multi-user packet from multiple sites.
  • the second site may be the same as the first site described above, or may be different from the first site described above.
  • the memory 1150 may also store instructions to perform the following process:
  • the access point transmits an acknowledgment packet to one or more stations of the plurality of stations that successfully transmit the uplink packet at the time of transmission.
  • the STA can know that the transmission of the uplink packet has been completed, and the STA needs to resend the uplink packet.
  • Figure 12 is a schematic block diagram of a station in accordance with another embodiment of the present invention.
  • station 120 includes an antenna 1210, a transmitter 1220, a receiver 1230, a processor 1240, and a memory 1250.
  • the processor 1240 controls the operation of the station 120 and can be used to process signals.
  • Memory 1250 can include read only memory and random access memory and provides instructions and data to processor 1240.
  • Transmitter 1220 and receiver 1230 can be coupled to antenna 1210.
  • the various components of the station 120 are coupled together by a bus system 1260 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 1260 in the figure.
  • station 120 may be STA 103a, STA 103b or STA 103c as shown in FIG.
  • the memory 1250 can store instructions to perform the following process:
  • a transmission control packet where the transmission control packet is used to indicate the length of the uplink packet sent by each of the multiple sites of the uplink multi-user multiple input multiple output transmission corresponding to the station;
  • An uplink packet is transmitted to the access point according to the transmission control packet, and the uplink packet does not include padding bits for increasing the length of the uplink packet.
  • the access point AP may divide the station STA into different transmission groups according to service requirements, such as STAs (103a, 103b, 103c) in FIG.
  • STAs 103a, 103b, 103c
  • they send uplink packets to the AP according to the same transmission control packet.
  • the foregoing plurality of stations belong to the same transmission group, that is, uplink multi-user packets corresponding to the same uplink MU-MIMO transmission.
  • the uplink packets sent by each STA in the transmission group together constitute an uplink multi-user packet.
  • the transmission control packet may be sent to the STA in the same transmission group based on the downlink MU-MIMO or OFDMA technology, or may be sent to the STA in the same transmission group by means of broadcast.
  • the control packet is transmitted, or the transmission control packet is sent to each STA in the same transmission group.
  • Each STA in the foregoing transmission group transmits an uplink packet according to the length of the transmission control packet indicating that it transmits the uplink packet.
  • the STA transmits the uplink packet there is no need to perform an action of adding a padding bit to the uplink packet in order to increase the length of the uplink packet. That is to say, the uplink packet transmitted by the STA does not include padding bits for increasing the length of the uplink packet.
  • the uplink packets sent by the multiple sites respectively form an uplink multi-user packet
  • the AP receives the uplink multi-user packet, that is, the access point receives the uplink multi-user packet from multiple sites as described in the foregoing scheme.
  • the station in the process of uplink multi-user multiple input multiple output transmission, the station sends the uplink packet according to the length indicated by the transmission control packet, and does not need to send the uplink packet for the same length as the uplink packet sent by other STAs.
  • the padding bits of the length in turn, can reduce the power consumption of the STA.
  • the STA does not transmit padding bits for increasing the length of the uplink packet, it is possible to avoid interference to the system due to the transmission of these padding bits.
  • the padding bit refers to a bit that does not carry any useful information added by the sender to the to-be-sent packet in the MAC layer or the physical layer in order to increase the length of the packet to be transmitted, and the receiver receives the bit.
  • the padding bits are directly discarded after the sender sends the packet containing the padding bits.
  • the padding bits of the present invention do not include bits added for other purposes in addition to increasing the length of the packet to be transmitted, for example, to ensure the length of the MAC layer packet by four octets (English: Octet) The bits added at the MAC layer for the boundary, and the bits added at the physical layer to ensure that the length of the physical layer packet is bounded by the OFDM symbol.
  • the memory 1350 can store instructions to perform the following process:
  • an acknowledgment packet is received from the access point.
  • the STA can know that the transmission of the uplink packet has been completed, and the STA needs to resend the uplink packet.
  • 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.
  • the disclosed apparatus and method 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. Specifically, it can be implemented by means of software and necessary general hardware.
  • the general-purpose hardware includes a general-purpose integrated circuit, a general-purpose CPU, a general-purpose memory, a general-purpose component, and the like, and of course, the dedicated hardware includes an application-specific integrated circuit, a dedicated CPU, and a dedicated memory. , special components, etc. to achieve.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • the technical solution of the present invention contributes in essence or to the prior art, or the technical side All or part of the case may be embodied in the form of a software product stored in a storage medium, including instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to execute the present invention. All or part of the steps of the method described in the various embodiments are invented.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (English: Read-Only Memory, abbreviated as ROM), a random access memory (English: Random Access Memory, abbreviated as RAM), a magnetic disk or an optical disk, and the like.
  • ROM Read-Only Memory
  • RAM Random Access Memory

Landscapes

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

Abstract

L'invention concerne un procédé de communication au sein d'un réseau local sans fil, et un dispositif de communication. Le procédé comporte les étapes suivantes: un point d'accès envoie un paquet de commande d'émission à une pluralité de stations, le paquet de commande d'émission étant utilisé pour indiquer à chaque station de la pluralité de stations une longueur pour l'envoi d'un paquet de liaison montante; le point d'accès reçoit un paquet multiutilisateurs de liaison montante en provenance de la pluralité de stations, le paquet multiutilisateurs de liaison montante comportant un paquet de liaison montante émis par chaque station de la pluralité de stations, chaque paquet de liaison montante au sein du paquet multiutilisateurs de liaison montante ne comportant pas de bits de remplissage utilisés pour accroître la longueur du paquet de liaison montante. La présente invention est capable de réduire les pertes de puissance d'une STA.
PCT/CN2014/086016 2014-09-05 2014-09-05 Procédé de communication au sein d'un réseau local sans fil, et dispositif de communication Ceased WO2016033798A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2014/086016 WO2016033798A1 (fr) 2014-09-05 2014-09-05 Procédé de communication au sein d'un réseau local sans fil, et dispositif de communication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2014/086016 WO2016033798A1 (fr) 2014-09-05 2014-09-05 Procédé de communication au sein d'un réseau local sans fil, et dispositif de communication

Publications (1)

Publication Number Publication Date
WO2016033798A1 true WO2016033798A1 (fr) 2016-03-10

Family

ID=55439041

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2014/086016 Ceased WO2016033798A1 (fr) 2014-09-05 2014-09-05 Procédé de communication au sein d'un réseau local sans fil, et dispositif de communication

Country Status (1)

Country Link
WO (1) WO2016033798A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101137182A (zh) * 2006-09-01 2008-03-05 华为技术有限公司 一种无线通信系统中的资源分配方法及系统
US20110194475A1 (en) * 2010-02-10 2011-08-11 Broadcom Corporation Preamble and header bit allocation for power savings within multiple user, multiple access, and/or MIMO wireless communications
US20120020261A1 (en) * 2010-07-21 2012-01-26 Qualcomm Incorporated Method and apparatus for ordering sub-fields of vht-sig-a and vit-sig-b fields
US20130286959A1 (en) * 2012-04-30 2013-10-31 Interdigital Patent Holdings, Inc. Method and apparatus for supporting coordinated orthogonal block-based resource allocation (cobra) operations

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101137182A (zh) * 2006-09-01 2008-03-05 华为技术有限公司 一种无线通信系统中的资源分配方法及系统
US20110194475A1 (en) * 2010-02-10 2011-08-11 Broadcom Corporation Preamble and header bit allocation for power savings within multiple user, multiple access, and/or MIMO wireless communications
US20120020261A1 (en) * 2010-07-21 2012-01-26 Qualcomm Incorporated Method and apparatus for ordering sub-fields of vht-sig-a and vit-sig-b fields
US20130286959A1 (en) * 2012-04-30 2013-10-31 Interdigital Patent Holdings, Inc. Method and apparatus for supporting coordinated orthogonal block-based resource allocation (cobra) operations

Similar Documents

Publication Publication Date Title
EP3547560B1 (fr) Procédé et appareil pour la transmission multitrame permettant la prise en charge de mu-mimo
US9807794B2 (en) Systems, methods and devices for dynamically setting response indication deferral in wireless networks
EP3160058B1 (fr) Procédé et appareil de transmission de trame
JP6321174B2 (ja) 送信の機会（ｔｘｏｐ）をシェアすること
US20170149547A1 (en) Method and apparatus for receiving frame
WO2010143894A2 (fr) Procédé et appareil de transmission de trames dans un système de réseau local sans fil (wlan)
US20180263047A1 (en) Method and apparatus for transmitting data unit on basis of trigger frame
WO2017084364A1 (fr) Dispositif de communication, et procédé de communication pour l'agrégation et la transmission de trames
CN106575988A (zh) 多用户、多输入多输出系统中的并行信道训练
US12058230B2 (en) Apparatus and method for signaling expansion in wireless local area network system
CN108631815B (zh) 数据传输方法、网络设备及终端设备
EP3425965B1 (fr) Adaptation de liaison wake-up-radio
JP2018512818A (ja) 制御フレームアグリゲーションフレーム
KR20180059858A (ko) 무선 네트워크에서의 가변 길이 블록 확인응답 필드들을 시그널링하고 생성하기 위한 시스템들 및 방법들
CN105850222A (zh) 用于正交频分多址（ofdma）传输的系统及方法
WO2017198043A1 (fr) Procédé et dispositif de transmission de données
CN113329500B (zh) 信息传输方法和装置
CN107078783B (zh) 传输信息的方法、接入点和用户设备
CN116368767A (zh) 一种Wi-Fi通信方法及设备
WO2016033798A1 (fr) Procédé de communication au sein d'un réseau local sans fil, et dispositif de communication
KR20210149567A (ko) Wlan 시스템에서 상향 링크 fd a-ppdu 전송을 지원하기 위한 장치 및 방법

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14901179

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 14901179

Country of ref document: EP

Kind code of ref document: A1