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WO2016041137A1 - Procédé de transmission de données hors-bande basé sur duplex intégral, point d'accès et station - Google Patents

Procédé de transmission de données hors-bande basé sur duplex intégral, point d'accès et station Download PDF

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Publication number
WO2016041137A1
WO2016041137A1 PCT/CN2014/086595 CN2014086595W WO2016041137A1 WO 2016041137 A1 WO2016041137 A1 WO 2016041137A1 CN 2014086595 W CN2014086595 W CN 2014086595W WO 2016041137 A1 WO2016041137 A1 WO 2016041137A1
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WIPO (PCT)
Prior art keywords
channel
time
data frame
time period
uplink data
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Chinese (zh)
Inventor
刘晟
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to PCT/CN2014/086595 priority Critical patent/WO2016041137A1/fr
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes

Definitions

  • the present invention relates to the field of communications, and in particular, to a method, an access point, and a station for transmitting data based on out-of-band full duplex in the field of communications.
  • WLAN Wireless Local Access Network
  • OFDM Orthogonal Frequency Division Multiplexing
  • High Efficiency WLAN Currently, the 802.11 standards organization of the Institute of Electrical and Electronics Engineers (“IEEE”) has launched a new generation of WLAN called High Efficiency WLAN (“HEW”). Standardization work for the standard 802.11ax. Multi-user transmission techniques such as Multi-user Multiple-Input Multiple-Output (“MU-MIMO”) technology and Orthogonal Frequency Division (Orthogonal Frequency Division) can be used in the standard. Multiple Access, referred to as "OFDMA" technology, etc., the multi-user transmission technology performs centralized scheduling and control through the AP, which can effectively reduce random competition and improve the spectrum efficiency of the WLAN system.
  • MU-MIMO Multi-user Multiple-Input Multiple-Output
  • OFDMA Orthogonal Frequency Division
  • the AP and the multiple STAs can only transmit uplink data or downlink data in one direction at the same time, and cannot simultaneously transmit the uplink data and the downlink data in both directions.
  • the application research of full-duplex technology in WLAN currently only involves the transmission scheme of in-band full-duplex, and does not involve the transmission scheme based on out-band full duplex in WLAN. It is not related to a transmission scheme based on out-of-band full-duplex in a WLAN employing multi-user transmission technology.
  • the embodiments of the present invention provide a method, an access point, and a station for transmitting data based on out-of-band full-duplex, which can implement out-of-band full-duplex communication of a communication node, thereby improving spectrum efficiency of the system. .
  • the first aspect provides an access point, including: a sending module, configured to send scheduling information to a first station on a first channel, where the scheduling information is used to schedule the first station to send an uplink data frame; And acquiring, by the receiving module, the self-interference channel estimation of the first channel acquired by the acquiring module, in a first time period after the transmitting module sends the scheduling information, Receiving, after the first time period, the uplink data frame that is sent by the first station according to the scheduling information on the first channel; the sending module is further configured to: send downlink data to the second station on the second channel a frame, wherein the uplink data frame received by the receiving module and the downlink data frame sent by the sending module overlap partially or completely in time, and the first channel is different from the carrier frequency of the second channel.
  • the sending module is configured to: send physical layer signaling to the first station on the first channel, where the physical layer signaling carries the Scheduling information; or transmitting a media access control MAC frame to the first station on the first channel, the MAC frame carrying the scheduling information.
  • the scheduling information that is sent by the sending module includes at least one of the following information: each The uplink data transmission duration of the first station, the uplink data transmission duration of the first station with the largest uplink data transmission duration, the uplink data transmission duration upper limit, and the uplink data transmission duration lower limit.
  • the sending module sends the scheduling information on the first channel
  • the start time is the same as the start time of transmitting the downlink data frame on the second channel.
  • the transmitting module is further configured to: After receiving the uplink data frame, the receiving module sends an uplink response frame to the first station after the second time period; the receiving module is further configured to: after the sending module sends the downlink data frame, and after a third time The segment receives the downlink response frame sent by the second station, where the uplink response frame and the downlink response frame do not overlap each other in time.
  • the first site and the second site do not include the same site
  • the first channel is
  • the start time of sending the scheduling information is the same as the starting time of transmitting the downlink data frame on the second channel
  • the time length T UL of the uplink data frame and the time length T DL of the downlink data frame satisfy the following relationship.
  • T 1 , T 2 , and T 3 represent time lengths of the first time period, the second time period, and the third time period, respectively;
  • Tt represents a length of time for transmitting the scheduling information;
  • T ACK_UL represents the uplink response frame.
  • T ACK_DL indicates the length of time of the downlink response frame;
  • T UL MAX indicates the upper limit of the uplink data transmission duration;
  • T UL MIN indicates the lower limit of the duration of the uplink data transmission.
  • the sending module is further configured to: At the time when the receiving module starts receiving the uplink data frame, suspending transmitting the downlink data frame to the second station on the second channel, and continuing to send to the second station on the second channel after the fourth time period And the downlink data frame, so that the second station acquires the self-interference channel estimation information of the second channel in the fourth time period.
  • the start time of the scheduling information is sent on the first channel, and the sending is performed on the second channel
  • the time length T UL of the uplink data frame and the time length T DL of the downlink data frame satisfy one of the following relations (5) to (8):
  • T 1 , T 2 , T 3 , and T 4 represent time lengths of the first time period, the second time period, the third time period, and the fourth time period, respectively;
  • Tt represents a time when the scheduling information is sent. Length; T ACK_UL indicates the length of time of the uplink response frame; T ACK_DL indicates the length of time of the downlink response frame; T UL MAX indicates the upper limit of the uplink data transmission duration; T UL MIN indicates the lower limit of the uplink data transmission duration.
  • the first time period, the second time The length of the segment and the third time period are equal and are both short interframe spaces SIFS.
  • a station including: a receiving module, configured to receive scheduling information sent by an access point AP on a first channel, where the scheduling information is used by a scheduling station to send an uplink data frame; and a sending module is configured to After receiving the scheduling information, the receiving module sends the uplink data frame to the AP on the first channel according to the scheduling information, and the receiving module is further configured to: receive the AP on the second channel.
  • the acquiring module is configured to acquire the self-interference channel estimation information of the second channel in a fourth time period in which the sending module starts to send the uplink data frame; the receiving module is further used to: After the fourth time period, the self-interference channel estimation information of the second channel acquired by the acquiring module continues to be connected to the second channel.
  • the downlink data frame sent from the AP is configured to acquire the self-interference channel estimation information of the second channel in a fourth time period in which the sending module starts to send the uplink data frame; the receiving module is further used to: After the fourth time period, the self-interference channel estimation information of the second channel acquired by the acquiring module continues to be connected to the second channel.
  • the receiving module is configured to: receive physical layer signaling sent by the AP on the first channel, where the physical layer signaling carries the scheduling And receiving the media access control MAC frame sent by the AP on the first channel, where the MAC frame carries the scheduling information.
  • the scheduling information received by the receiving module includes at least one of the following information: each The uplink data transmission duration of the scheduled station, the uplink data transmission duration of the site with the largest uplink data transmission duration, the upper limit of the uplink data transmission duration, and the lower limit of the uplink data transmission duration.
  • the receiving module receives the scheduling information on the first channel
  • the start time is the same as the start time of receiving the downlink data frame on the second channel.
  • the receiving module is further used to After receiving the uplink data frame, the sending module receives the uplink response frame sent by the AP, and the sending module is further configured to: after the receiving module receives the downlink data frame, and after a third time period Sending a downlink response frame to the AP, where the uplink response frame and the The downlink response frames do not overlap each other in time.
  • the start time of receiving the scheduling information on the first channel is received on the second channel
  • the time length T UL of the uplink data frame and the time length T DL of the downlink data frame satisfy one of the following relations (9) to (12):
  • T 1 , T 2 , T 3 , and T 4 represent time lengths of the first time period, the second time period, the third time period, and the fourth time period, respectively;
  • Tt represents a time when the scheduling information is sent. Length; T ACK_UL indicates the length of time of the uplink response frame; T ACK_DL indicates the length of time of the downlink response frame; T UL MAX indicates the upper limit of the uplink data transmission duration; T UL MIN indicates the lower limit of the uplink data transmission duration.
  • the first time period, the second time period, the third time period, and the The time lengths of the fourth time period are equal and are both short interframe spaces SIFS.
  • a method for transmitting data based on out-of-band full-duplex comprising: sending scheduling information to a first station on a first channel, where the scheduling information is used to schedule the first station to send uplink data.
  • the first channel is different from the carrier frequency of the second channel.
  • the sending the scheduling information to the first station on the first channel includes: sending a physical layer message to the first station on the first channel
  • the physical layer signaling carries the scheduling information, or sends a media access control MAC frame to the first station on the first channel, where the MAC frame carries the scheduling information.
  • the scheduling information includes at least one of the following information: each of the first The uplink data transmission duration of the station, the uplink data transmission duration of the first station, the uplink data transmission duration upper limit, and the uplink data transmission duration lower limit of the uplink data transmission duration.
  • the starting time of sending the scheduling information on the first channel is The start time of transmitting the downlink data frame on the second channel is the same.
  • the method further includes: After receiving the uplink data frame and after a second time period, sending an uplink response frame to the first station, and after receiving the downlink data frame, and receiving a downlink response frame sent by the second station, after receiving the downlink data frame, where The uplink response frame and the downlink response frame do not overlap each other in time.
  • the first site and the second site do not include the same site, and the first channel is configured
  • the start time of sending the scheduling information is the same as the starting time of transmitting the downlink data frame on the second channel
  • the time length T UL of the uplink data frame and the time length T DL of the downlink data frame satisfy the following relationship.
  • T 1 , T 2 , and T 3 represent time lengths of the first time period, the second time period, and the third time period, respectively;
  • Tt represents a length of time for transmitting the scheduling information;
  • T ACK_UL represents the uplink response frame.
  • T ACK_DL indicates the length of time of the downlink response frame;
  • T UL MAX indicates the upper limit of the uplink data transmission duration;
  • T UL MIN indicates the lower limit of the duration of the uplink data transmission.
  • the second channel is Sending, by the second station, the downlink data frame, including: at the time of starting to receive the uplink data frame, suspending sending the downlink data frame to the second station on the second channel, and continuing to the second channel after the fourth time period
  • the downlink data frame is sent to the second station, so that the second station acquires the self-interference channel estimation information of the second channel in the fourth time period.
  • the start time of sending the scheduling information on the first channel is sent on the second channel
  • the time length T UL of the uplink data frame and the time length T DL of the downlink data frame satisfy one of the following relations (5) to (8):
  • T 1 , T 2 , T 3 , and T 4 represent time lengths of the first time period, the second time period, the third time period, and the fourth time period, respectively;
  • Tt represents a time when the scheduling information is sent. Length; T ACK_UL indicates the length of time of the uplink response frame; T ACK_DL indicates the length of time of the downlink response frame; T UL MAX indicates the upper limit of the uplink data transmission duration; T UL MIN indicates the lower limit of the uplink data transmission duration.
  • the first time period, the second time The length of the segment and the third time period are equal and are both short interframe spaces SIFS.
  • a fourth aspect provides a method for transmitting data based on out-of-band full-duplex, the method comprising: receiving, on a first channel, scheduling information sent by an access point AP, where the scheduling information is used by a scheduling station to send an uplink data frame.
  • the receiving the scheduling information sent by the access point AP on the first channel including: receiving, by using the first channel, a physical layer sent by the AP Signaling, the physical layer signaling carries the scheduling information; or receiving, on the first channel, a media access control MAC frame sent by the AP, where the MAC frame carries the scheduling information.
  • the scheduling information includes at least one of the following information: The uplink data transmission duration, the uplink data transmission duration of the uplink data transmission duration, the uplink data transmission duration upper limit, and the uplink data transmission duration lower limit.
  • the starting time of receiving the scheduling information on the first channel is The start time of receiving the downlink data frame on the second channel is the same.
  • the method further includes: Receiving the uplink data frame and receiving the uplink response frame sent by the AP after the second time period; after receiving the downlink data frame, and after the third time period, sending a downlink response frame to the AP, where the uplink response frame is sent And the downlink response frames do not overlap each other in time.
  • the start time of receiving the scheduling information on the first channel is received on the second channel
  • the time length T UL of the uplink data frame and the time length T DL of the downlink data frame satisfy one of the following relations (9) to (12):
  • T 1 , T 2 , T 3 , and T 4 represent time lengths of the first time period, the second time period, the third time period, and the fourth time period, respectively;
  • Tt represents a time when the scheduling information is sent. Length; T ACK_UL indicates the length of time of the uplink response frame; T ACK_DL indicates the length of time of the downlink response frame; T UL MAX indicates the upper limit of the uplink data transmission duration; T UL MIN indicates the lower limit of the uplink data transmission duration.
  • the first time period, the second time period, the third time period, and the The time lengths of the fourth time period are equal and are both short interframe spaces SIFS.
  • the method, the access point, and the station for transmitting data based on the out-of-band full-duplex send scheduling information to the station on the first channel through the access point, and acquire the self of the first channel.
  • the access point can receive, according to the self-interference channel estimation information, an uplink data frame sent by the station according to the scheduling information on the first channel; and at the same time, the access point is different from the first channel in the carrier frequency
  • the downlink channel is sent to the station on the second channel, thereby enabling out-of-band full-duplex communication of the communication node and improving the spectrum efficiency of the system.
  • 1(a) to 1(f) are schematic diagrams of application scenarios of an embodiment of the present invention.
  • FIG. 2 is a schematic block diagram of an access point in accordance with an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a single node out-of-band full duplex transmission in accordance with an embodiment of the present invention.
  • FIG. 4 is another schematic diagram of a single node out-of-band full duplex transmission in accordance with an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of multi-node out-of-band full duplex transmission in accordance with an embodiment of the present invention.
  • FIG 6 is another schematic diagram of multi-node out-of-band full duplex transmission in accordance with an embodiment of the present invention.
  • FIG. 7 is a schematic block diagram of a station in accordance with an embodiment of the present invention.
  • FIG. 8 is a schematic flowchart of a method for transmitting data based on out-of-band full duplex according to an embodiment of the present invention.
  • FIG. 9 is another schematic flowchart of a method for transmitting data based on out-of-band full duplex according to an embodiment of the present invention.
  • FIG. 10 is a schematic flowchart of a method for transmitting data based on out-of-band full duplex according to another embodiment of the present invention.
  • 11 is another schematic flowchart of a method for transmitting data based on out-of-band full duplex according to another embodiment of the present invention.
  • Figure 12 is a schematic block diagram of an access point in accordance with another embodiment of the present invention.
  • Figure 13 is a schematic block diagram of a station in accordance with another embodiment of the present invention.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA wideband code “Wideband Code Division Multiple Access”
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • UMTS Universal Mobile Telecommunication System
  • WiMAX Worldwide Interoperability for Microwave Access
  • the embodiment of the present invention is only described by taking a WLAN system as an example, but the present invention is not limited thereto, and the method and apparatus according to the embodiments of the present invention may also be applied to other communication systems; similarly, the embodiment of the present invention is also The AP and the STA in the WLAN system are taken as an example for description. However, the present invention is not limited thereto, and the method and apparatus according to the embodiments of the present invention can also be applied to base stations and user equipments in other communication systems.
  • the base station may be a base station (Base Transceiver Station, abbreviated as "BTS”) in GSM or CDMA, or may be a base station (NodeB, abbreviated as “NB”) in WCDMA, or an evolved base station in LTE ( Evolved Node B, abbreviated as "ENB or e-NodeB", is not limited in the present invention.
  • BTS Base Transceiver Station
  • NodeB base station
  • Evolved Node B abbreviated as "ENB”
  • e-NodeB evolved base station in LTE
  • the user equipment may be referred to as a terminal (Mobile), a mobile station (Mobile Station, or “Mobile”), or a mobile terminal (Mobile Terminal).
  • Communicating with one or more core networks via a Radio Access Network (“RAN") for example, the user equipment may be a mobile phone (or “cellular” phone) or a computer with a mobile terminal, etc.
  • the user equipment may also be a portable, pocket, handheld, computer built-in or in-vehicle mobile device that exchanges voice and/or data with the wireless access network.
  • FIG. 1(a) to 1(f) are schematic views respectively showing an application scenario of an embodiment of the present invention.
  • the AP supports full-duplex communication, that is, at least one STA receives a downlink signal from the AP, and at least one STA sends an uplink signal to the AP; and each STA still adopts The mode of half-duplex communication, that is, each STA only receives or transmits signals at any time.
  • This full-duplex communication can also be called single-node full-duplex communication.
  • Full-duplex communication may also include multi-node full-duplex communication, that is, in addition to the way that the AP adopts full-duplex communication, at least one STA also adopts full-duplex communication, as shown in FIG. 1(c) to 1(f). Shown. Among them, STA3 in Figures 1(c) and 1(d) supports full-duplex communication, while STA1 and STA2 simultaneously transmits an uplink signal or simultaneously receives a downlink signal; STA3 in Figure 1(e) supports full-duplex communication, and STA1 and STA2 respectively receive downlink signals and transmit uplink signals; STA1 and STA3 in Figure 1(f) support Full duplex communication, while STA2 only supports half duplex communication.
  • the embodiment of the present invention is described by taking only the application scenario in FIG. 1(a) to FIG. 1(f) as an example, but the present invention is not limited thereto.
  • the system may further include more STAs and the like.
  • the access point 100 includes: a sending module 110, an obtaining module 120, and a receiving module 130, where
  • the sending module 110 is configured to send scheduling information to the first station on the first channel, where the scheduling information is used to schedule the first station to send an uplink data frame;
  • the obtaining module 120 is configured to acquire self-interference channel estimation information of the first channel in a first time period after the sending module 110 sends the scheduling information;
  • the receiving module 130 is configured to receive, according to the self-interference channel estimation information of the first channel acquired by the acquiring module 120, the uplink sent by the first station according to the scheduling information on the first channel after the first time period.
  • Data Frame
  • the sending module 110 is further configured to: send a downlink data frame to the second station on the second channel, where the uplink data frame received by the receiving module 130 and the downlink data frame sent by the sending module 110 are partially in time or All overlap, and the first channel is different from the carrier frequency of the second channel.
  • the sending module 110 of the AP may send scheduling information to the first station on the first channel, and may The second station sends a downlink data frame.
  • the acquiring module 120 may obtain the self-interference channel estimation information of the first channel in the first time period after the sending module 110 sends the scheduling information, so that the receiving module 130 may be configured according to the self-interference channel. Estimating the information, receiving the uplink data frame sent by the first station according to the scheduling information on the first channel, where the uplink data frame received by the receiving module 130 and the downlink data frame sent by the sending module 110 are in time Part or all overlap.
  • the access point based on the out-of-band full-duplex transmission data in the embodiment of the present invention sends scheduling information to the station on the first channel through the access point, and acquires self-interference channel estimation information of the first channel, thereby receiving
  • the ingress point can receive, according to the self-interference channel estimation information, an uplink data frame sent by the station according to the scheduling information on the first channel; and at the same time, the access point sends the uplink frequency frame to the station on a second channel different from the first channel.
  • the downlink data frame enables the out-of-band full-duplex communication of the communication node and improves the spectral efficiency of the system.
  • the first channel and the second channel are respectively radio channels occupying a certain bandwidth in the spectrum, and the carrier frequencies of the two channels are different, that is, there is no overlapping area in the passband of the first channel and the second channel.
  • the first channel and the second channel may be adjacent or separated by a certain frequency band, and the bandwidths of the first channel and the second channel may be the same or different.
  • the radio channel included in the first channel or the second channel may be contiguous or non-contiguous in frequency spectrum. It should also be understood that in the embodiment of the present invention, the first channel and the second channel represent only two types. The channel, and the number, type, and the like of the channel are not limited.
  • the first channel may include various channels used by the station STA to send the uplink data frame to the access point AP, and the second channel may also include the AP sending the downlink to the STA. The various channels used by the data frame.
  • the first station may represent a station that sends an uplink data frame to the AP
  • the second station may represent a station that receives the downlink data frame sent by the AP.
  • a station can support full-duplex communication, that is, when the station can receive data or signals and can transmit data or signals, the station can belong to the first station or to the second station.
  • the data transmission direction may include an uplink direction and a downlink direction, where the uplink direction may indicate a transmission direction of data from the STA to the AP, and the downlink direction may indicate transmission of data from the AP to the STA.
  • Directions; correspondingly, data transmitted in the uplink direction may be referred to as uplink data, and frames carrying uplink data may also be referred to as uplink data frames; data transmitted in the downlink direction may be referred to as downlink data, and frames carrying downlink data may also be used. It is called a downlink data frame.
  • the AP may first obtain the usage rights of the first channel and the second channel through channel competition. For example, the AP may obtain the right to use the channel through the existing channel contending technology of the WLAN.
  • the channel contending technology includes, for example, Request To Send (RTS)/Clear To Send (referred to as “Clear To Send”.
  • RTS Request To Send
  • Clear To Send referred to as “Clear To Send”.
  • the CTS Request To Send
  • CTS Clear To Send
  • the AP first simultaneously transmits an RTS frame on the first channel and the second channel, wherein the value of the duration field of the RTS frame
  • the duration of the out-of-band full-duplex transmission after the CTS is greater than or equal to the end of the response frame, where the response frame may be an Acknowledgement (abbreviated as "ACK") or a Block Acknowledgement ("BA”).
  • ACK Acknowledgement
  • BA Block Acknowledgement
  • TA Transmit Address
  • the receiving address of the RTS frame sent by the AP on the first channel (Receive Address, The field referred to as “RA” is set to the address of STA1 participating in the uplink data transmission in the multi-node out-of-band full-duplex transmission, and the receiving address RA field of the RTS frame transmitted in the second channel is set to participate in the multi-node out-of-band full double
  • the address of STA2 that performs downlink data reception during transmission.
  • STA1 and STA2 receive the RTS frame, they respectively respond with a CTS frame, wherein the duration field is set to the out-of-band full-duplex transmission duration after the CTS to the end of the response frame.
  • NAV Network Allocation Vector
  • the AP may send a CTS-to-Self frame on the first channel and the second channel with a larger power, where the receiving address field of the frame is set to the AP's own address, and the value of the duration field is greater than or equal to
  • the AP can perform out-of-band full-duplex transmission after transmitting the CTS-to-Self frame and, for example, after the SIFS time.
  • the embodiment of the present invention only takes the example that the AP obtains the channel usage right through the RTS/CTS process and the CTS-to-Self process, but the present invention is not limited thereto, and the access point may also adopt other various methods. Get the right to use the channel.
  • each STA does not directly contend for the channel, but after the channel obtains the channel usage right, the AP uses a certain scheduling algorithm to centrally schedule and control each STA for uplink or downlink transmission, and allows multiple STAs to pass.
  • MU-MIMO and/or OFDMA are simultaneously transmitted in one direction, that is, the AP simultaneously transmits downlink signals to multiple STAs, or the AP simultaneously receives uplink signals from multiple STAs.
  • the reason that the AP can implement centralized scheduling and control is that, on the one hand, the AP can have the information of the amount of downlink data to be received by the STAs in the downlink direction; on the other hand, the STA can be reported by the STA, or the AP can first query the STA and then report it. The AP can also obtain the information about the amount of uplink data to be sent by the STAs in the uplink direction. In addition, the AP can obtain the uplink channel and the downlink channel between the AP and each STA by means of self-measurement and STA measurement and reporting. Information such as channel state information, signal to interference and noise ratio (SINR), and the like. Thus, the AP can schedule based on the above information.
  • One or more STAs and may perform multi-user transmission in a suitable manner such as MU-MIMO, OFDMA, or the like.
  • the AP when performing multi-user transmission, may also determine an STA (ie, the first station) for transmitting uplink data and participate in out-of-band full-duplex transmission, which participates in out-of-band full-duplex transmission.
  • the STA ie, the second station
  • the AP may also acquire the data volume information to be sent and to be received, and the information related to the channel between the STAs in each of the STAs in the uplink and downlink directions, and the like. Used for outbound full duplex transmission scheduling.
  • the AP may send, on the first channel, a trigger frame carrying scheduling information for full-duplex transmission, to schedule at least one first STA to send an uplink data frame on the first channel; on the other hand, the sending of the AP The module 110 may send a downlink data frame to the at least one second STA on the second channel with different carrier frequencies.
  • multiplexing may be performed by using a multi-user transmission manner such as uplink MU-MIMO and/or uplink OFDMA.
  • the AP may perform multiplexing by using a multi-user transmission mode such as downlink MU-MIMO and/or downlink OFDMA.
  • the AP may send the downlink data frame on the second channel while transmitting the trigger frame on the first channel; in addition, the AP may also send the trigger frame to send the downlink data frame first, or the AP may also send the downlink data frame first.
  • the downlink data frame retransmits the trigger frame, which is not limited by the present invention.
  • the sending moment of the sending module 110 transmitting the scheduling information on the first channel is the same as the starting time of sending the downlink data frame on the second channel.
  • the AP passes the T0 time, and sends the scheduling information on the first channel, and sends the downlink data frame on the second channel, where the T0 time is, for example.
  • SIFS short interframe space
  • the sending module 110 is specifically configured to:
  • the MAC frame carries the scheduling information.
  • the triggering frame that carries the scheduling information sent by the AP to the first STA may send a scheduling indication to the first STA by using physical layer signaling, for example, may be in a preamble field of the trigger frame.
  • the scheduling information is carried in the physical layer signaling field, and the scheduling information may be sent to the first STA by using a MAC frame.
  • the scheduling information may be carried in a data field of the trigger frame.
  • the physical layer signaling field may adopt a lower-order Modulation and Coding Scheme ("MCS"), for example, MCS0 in the WLAN, that is, Binary Phase Shift Keying (abbreviated as Binary Phase Shift Keying). "BPSK") modulation scheme, and convolutional coding with a code rate of 1/2. Therefore, even if the SINR of the channel is low, the first STA can correctly decode.
  • MCS Modulation and Coding Scheme
  • BPSK Binary Phase Shift Keying
  • convolutional coding with a code rate of 1/2. Therefore, even if the SINR of the channel is low, the first STA can correctly decode.
  • the data field carrying the scheduling information in the trigger frame may also adopt a lower-order MCS such as MCS0. The transmission is performed, but the present invention is not limited to this.
  • the scheduling information is used to schedule the first station to send an uplink data frame, where the scheduling information may indicate the scheduled first station by using various manners, for example, the scheduling information may include each The identifier or the address information of the STA, or the scheduling information may include the group identifier or the group address information of the group to which the first STA belongs.
  • the scheduling information may include each The identifier or the address information of the STA, or the scheduling information may include the group identifier or the group address information of the group to which the first STA belongs.
  • the scheduling information sent by the sending module 110 includes at least one of the following information: an uplink data transmission duration of each of the first stations, and an uplink data transmission of the first station with a maximum uplink data transmission duration. Duration, upstream data transmission duration upper limit and upstream data transmission duration lower limit.
  • the AP acts as the sender, so the AP can always determine the length of the downlink data frame to be sent to the first STA.
  • the AP can determine the modulation and coding scheme used by the first STA to transmit the uplink data frame and the amount of uplink transmission data, so the AP can completely determine the length of the uplink data frame to be sent by each first STA.
  • the scheduling information sent by the AP may include an uplink data transmission duration of each first STA, and/or an uplink data transmission duration of the STA with the largest uplink data transmission duration in the first STA.
  • the AP cannot accurately determine the modulation and coding scheme used by the first STA to transmit the uplink data frame and the amount of data transmitted in the uplink, and thus the AP cannot be completely
  • the length of the uplink data frame to be transmitted by each first STA is determined.
  • the scheduling information sent by the AP may include an upper limit of the uplink data transmission duration, that is, the length of the uplink data frame sent by all the first STAs cannot exceed the upper limit, or the scheduling information may include a lower limit of the uplink data transmission duration. That is, the length of the uplink data frame sent by all the first STAs cannot be lower than the lower limit.
  • the data transmission duration is typically in units of milliseconds (ms), microseconds (us), or the like, or the data transmission duration may also be in units of OFDM symbol length.
  • the content included in the scheduling information may not be limited thereto.
  • uplink MU-MIMO and/or uplink OFDMA may be adopted.
  • the user transmission mode is multiplexed.
  • the scheduling information may further include resource allocation information, user scheduling information, and the like of the corresponding uplink MU-MIMO and/or uplink OFDMA.
  • the sending module 110 of the AP starts to receive the uplink data frame from the first STA on the first channel after the first time period T1 is sent, and the first time period T1 is, for example, SIFS, at this time, the sending module 110 of the AP still sends a downlink data frame to the second STA on the second channel, that is, the uplink data frame received by the receiving module 130 and the downlink data frame sent by the sending module 110 are in time. Part or all overlap, the AP enters the out-of-band full-duplex transmission phase, as shown in Figures 3-6.
  • the AP transmitting the downlink data frame on the second channel may cause the AP to interfere with receiving the uplink data frame on the first channel.
  • the acquiring module 120 of the AP may acquire the self-interference channel estimation information of the first channel in a first time period after the sending module 110 sends the scheduling information.
  • the acquiring module 120 of the AP can The self-interference channel estimation on the first channel is performed during the first time period, and the self-interference channel estimation is not interfered by the uplink data frame from the first STA.
  • the access point based on the out-of-band full-duplex transmission data in the embodiment of the present invention sends scheduling information to the station on the first channel through the access point, and acquires self-interference channel estimation information of the first channel, thereby receiving
  • the ingress point can receive, according to the self-interference channel estimation information, an uplink data frame sent by the station according to the scheduling information on the first channel; and at the same time, the access point sends the uplink frequency frame to the station on a second channel different from the first channel.
  • the downlink data frame enables the out-of-band full-duplex communication of the communication node and improves the spectral efficiency of the system.
  • the sending module 110 is further configured to: after the receiving module 130 receives the uplink data frame, and after a second time period, send an uplink response frame to the first station;
  • the receiving module 130 is further configured to: after the sending the downlink data frame, send the downlink response frame sent by the second station, where the uplink response frame and the downlink response frame are in time Do not overlap each other.
  • the uplink response frame and the downlink response frame may not overlap each other in time, so that the receiving module 130 of the AP receives the second channel.
  • the transmitting module 110 of the AP does not transmit a signal on the first channel, and does not interfere with the reception of the downlink response frame, and thus does not need to perform a self-interference cancellation operation on the second channel.
  • the uplink response frame or the downlink response frame is, for example, ACK or BA, etc., but the present invention is not limited thereto.
  • the full-duplex communication system when the first site and the second site do not include the same site, that is, each site only receives or sends a signal at any time.
  • the full-duplex communication system only the AP adopts full duplex.
  • the STA adopts a half-duplex communication manner, and thus, the full-duplex communication system can also be referred to as a single-node full-duplex communication system.
  • the AP In the single-node full-duplex communication system, the AP only needs to perform self-interference channel estimation on the first channel in the first time period, thereby being able to accurately receive the uplink data frame sent by the first STA.
  • the site when the first site and the second site include the same site, the site receives both signals and signals at a certain moment, that is, the site and the AP adopt full duplex communication mode, and the whole
  • the duplex communication system can also be referred to as a multi-node full-duplex communication system. Therefore, in the multi-node full-duplex communication system, in order to accurately receive signals, not only the AP needs to perform self-interference channel estimation on the first channel in the first time period, but also the STA needs to perform self-interference in the second channel. Offset operation.
  • the sending module 110 is further configured to:
  • the receiving module 130 starts receiving the uplink data frame, suspending transmitting the downlink data frame to the second station on the second channel, and continuing to the second station on the second channel after the fourth time period And sending the downlink data frame, so that the second station acquires the self-interference channel estimation information of the second channel in the fourth time period.
  • the AP when the first site and the second site include the same site, the AP The sending module 110 sends a downlink data frame to the second station on the second channel until the receiving module 130 of the AP starts receiving the uplink data frame on the first channel; starting from receiving the uplink data frame from the receiving module 130 During the fourth time period, the second STA may estimate the self-interference channel of the second channel, so that the second STA can accurately receive the downlink data frame sent by the AP; after the fourth time period, the sending module 110 of the AP The downlink data frame is continuously sent to the second station on the second channel.
  • the AP may also be advanced. Suspending the transmission of the downlink data frame, for example, the AP starts to suspend the transmission of the downlink data frame in the first time period; accordingly, the STA only needs to perform self-interference channel estimation when transmitting the uplink data frame, and then the STA may according to the self-interference channel.
  • the estimated information is received for the downlink data frame.
  • the AP may perform scheduling to enable uplink and downlink transmission of out-of-band full-duplex transmission.
  • the absolute value of the time difference at the end time is greater than the length of time of a response frame (ACK or BA, etc.), so that the uplink and downlink response frames do not overlap each other in time, so that when the AP receives the downlink response frame from the second STA, the AP is The uplink acknowledgement frame is not transmitted on the first channel, so the AP does not need to perform self-interference cancellation operation on the second channel, thereby simplifying system complexity and improving system performance.
  • the AP may first obtain the usage right of the first channel with the carrier frequency F1 and the second channel with the carrier frequency F2 through channel competition; after the initial time period, the AP starts to be at the carrier frequency F2.
  • the second channel sends a downlink data frame to the second STA.
  • the AP starts to send a trigger frame on the first channel with the carrier frequency F1, and is used to schedule the first STA to send the uplink data frame; the second after the trigger frame ends.
  • the AP acquires the self-interference channel estimation information of the first channel for subsequent self-interference cancellation operation on the first channel, so that the uplink data frame from the first STA can be accurately received.
  • the length of the uplink data frame to be sent by each first STA may be completely determined, as long as the time length T UL of the uplink data frame and the time length T DL of the downlink data frame can satisfy the following relationship (1) or (2), it can be ensured that the uplink and downlink acknowledgment frames do not overlap each other in time, so that when the AP receives the response frame from the second STA, the AP does not transmit a signal on the first channel, and thus does not need to perform self-interference on the second channel. Offset operation.
  • T 1 , T 2 , and T 3 represent time lengths of the first time period, the second time period, and the third time period, respectively;
  • Tt represents a length of time for transmitting the scheduling information;
  • T ACK_UL represents the uplink response frame.
  • the length of time; T ACK_DL indicates the length of time of the downlink response frame.
  • the AP may include an uplink data transmission duration upper limit or an uplink data transmission duration lower limit in the scheduling information, that is, all the first
  • the length of the uplink data frame sent by a STA cannot exceed the upper limit of the uplink data transmission duration, or the length of the uplink data frame sent by all the first STAs cannot be lower than the lower limit of the uplink data transmission duration. Therefore, the AP can be scheduled, and the uplink and downlink response frames can be guaranteed as long as the time length T UL of the uplink data frame and the time length T DL of the downlink data frame can satisfy the following relationship (3) or (4).
  • the AP does not transmit a signal on the first channel, and thus does not need to perform a self-interference cancellation operation on the second channel.
  • T 1 , T 2 , and T 3 represent time lengths of the first time period, the second time period, and the third time period, respectively;
  • Tt represents a length of time during which the scheduling information is sent;
  • T ACK_UL represents the uplink response frame.
  • T ACK_DL indicates the length of time of the downlink response frame;
  • T UL MAX indicates the upper limit of the uplink data transmission duration, that is, T UL ⁇ T UL MAX ;
  • T UL MIN indicates the lower limit of the uplink data transmission duration, that is, T UL ⁇ T UL MIN .
  • the AP passes the first end of the first channel transmission trigger frame.
  • the time period that is, when the AP starts to receive the uplink data frame on the first channel
  • the AP pauses to send the downlink data frame on the second channel, and then resumes transmitting the downlink data frame on the second channel after the fourth time period
  • the first STA starts to send an uplink data frame to the AP after the first time period of the first channel reception trigger frame ends; at the same time, the second STA pauses to receive the downlink data frame on the second channel, and at the fourth time
  • the self-interference channel estimation information on the second channel is obtained.
  • the second STA starts to receive the downlink data frame from the AP on the second channel.
  • the uplink and downlink response frames can be guaranteed.
  • the time does not overlap each other, so that when the AP receives the response frame from the second STA, the AP does not transmit a signal on the first channel, and thus does not need to perform a self-interference cancellation operation on the second channel.
  • T 1 , T 2 , T 3 , and T 4 represent time lengths of the first time period, the second time period, the third time period, and the fourth time period, respectively;
  • Tt represents a time when the scheduling information is sent. Length;
  • T ACK_UL indicates the length of time of the uplink response frame;
  • T ACK_DL indicates the length of time of the downlink response frame;
  • T UL MAX indicates the upper limit of the uplink data transmission duration; and
  • T UL MIN indicates the lower limit of the uplink data transmission duration.
  • start time of transmitting the scheduling information on the first channel is the same as the starting time of transmitting the downlink data frame on the second channel in FIG. 3 to FIG. 6, but the present invention is not limited to
  • the start time of sending the scheduling information may be different from the starting time of sending the downlink data frame, and the relationship (1) to (8) may be adaptively changed to make the uplink response frame.
  • the downlink response frames do not overlap each other in time.
  • the embodiment of the present invention is only described by taking the same time lengths of the first time period, the second time period, the third time period, and the fourth time period as an example, but the present invention is not limited thereto, and the first time period
  • the lengths of the second time period, the third time period, and the fourth time period may also be set to be unequal as needed.
  • the access point based on the out-of-band full-duplex transmission data in the embodiment of the present invention sends scheduling information to the station on the first channel through the access point, and acquires self-interference channel estimation information of the first channel, thereby receiving
  • the ingress point can receive, according to the self-interference channel estimation information, an uplink data frame sent by the station according to the scheduling information on the first channel; and at the same time, the access point sends the uplink frequency frame to the station on a second channel different from the first channel.
  • the downlink data frame enables the out-of-band full-duplex communication of the communication node and improves the spectral efficiency of the system.
  • a site 200 includes:
  • the receiving module 210 is configured to receive scheduling information sent by the access point AP on the first channel, where the scheduling information is used by the scheduling station to send an uplink data frame.
  • the sending module 220 is configured to send the uplink data frame to the AP on the first channel according to the scheduling information after the receiving module 210 receives the scheduling information and passes the first time period;
  • the receiving module 210 is further configured to: receive the downlink data frame sent by the AP on the second channel, until the sending module 220 starts to send the uplink data frame, where the uplink data frame sent by the sending module 220 and the receiving module 210 Receiving the downlink data frame partially or completely overlapping in time, and the first channel is different from the carrier frequency of the second channel;
  • the obtaining module 230 is configured to acquire self-interference channel estimation information of the second channel in a fourth time period in which the sending module 220 starts to send the uplink data frame;
  • the receiving module 210 is further configured to: after receiving the fourth time period, continue to receive the downlink data sent by the AP on the second channel according to the self-interference channel estimation information of the second channel acquired by the acquiring module 230. frame.
  • the receiving module 210 of the station 200 may receive the scheduling information sent by the AP on the first channel; and the receiving module 210 may be The downlink data frame sent by the AP is received on the second channel different from the first channel; the sending module 220 of the station 200 may receive the scheduling information after the receiving module 210 passes the first time period, according to the scheduling The information is sent to the AP on the first channel, and the receiving module 210 may pause receiving the downlink data frame in the fourth time period in which the sending module 220 starts to send the uplink data frame, and the station 200
  • the obtaining module 230 may obtain the self-interference channel estimation information of the second channel. After the fourth time period, the receiving module 210 may continue to receive on the second channel according to the self-interference channel estimation information of the second channel.
  • the downlink data frame sent by the AP may send the scheduling information sent by the AP on the first channel; and the receiving module 210 may be The downlink data frame sent by the AP is received on the second channel different from the first channel; the sending module
  • the station based on the out-of-band full-duplex transmission data in the embodiment of the present invention receives the scheduling information sent by the access point through the station, and sends an uplink data frame to the access point on the first channel according to the scheduling information;
  • the station receives the downlink data frame sent by the access point on the second channel whose carrier frequency is different from the first channel, until the station starts to send the uplink data frame, and acquires the self-interference channel estimation information of the second channel, so that the station can According to the self-interference channel estimation information, the downlink data frame transmitted by the access point is continuously received on the second channel, thereby enabling out-of-band full-duplex communication of the communication node, and the spectrum efficiency of the system can be improved.
  • the receiving module 210 is specifically configured to:
  • the scheduling information received by the receiving module 210 includes at least one of the following information: an uplink data transmission duration of each scheduled station, and a site with a longest uplink data transmission duration.
  • the start time of the receiving module 210 receiving the scheduling information on the first channel is the same as the starting time of receiving the downlink data frame on the second channel.
  • the receiving module 210 is further configured to: after the sending module 220 sends the uplink data frame, and after a second time period, receive an uplink response frame sent by the AP;
  • the sending module 220 is further configured to send a downlink response frame to the AP after the receiving module 210 receives the downlink data frame and after a third time period, where the uplink response frame and the downlink response frame are not in time overlapping.
  • the time of the uplink data frame satisfy one of the following relations (9) to (12):
  • T 1 , T 2 , T 3 , and T 4 represent time lengths of the first time period, the second time period, the third time period, and the fourth time period, respectively;
  • Tt represents a time when the scheduling information is sent. Length; T ACK_UL indicates the length of time of the uplink response frame; T ACK_DL indicates the length of time of the downlink response frame; T UL MAX indicates the upper limit of the uplink data transmission duration; T UL MIN indicates the lower limit of the uplink data transmission duration.
  • the time lengths of the first time period, the second time period, the third time period, and the fourth time period are equal and are all short inter-frame intervals SIFS.
  • the station based on the out-of-band full-duplex transmission data in the embodiment of the present invention receives the scheduling information sent by the access point through the station, and sends an uplink data frame to the access point on the first channel according to the scheduling information;
  • the station receives the downlink data frame sent by the access point on the second channel whose carrier frequency is different from the first channel, until the station starts to send the uplink data frame, and acquires the self-interference channel estimation information of the second channel, so that the station can According to the self-interference channel estimation information, the downlink data frame sent by the access point is continuously received on the second channel, thereby enabling out-of-band full-duplex communication of the communication node, improving the spectrum efficiency of the system, and simplifying the system. Complexity to improve system performance.
  • FIG. 8 shows a schematic flow diagram of an out-of-band full-duplex based transmission data method 400, such as performed by an access point AP, in accordance with an embodiment of the present invention. As shown in FIG. 8, the method 400 includes:
  • S410 Send scheduling information to the first station on the first channel, where the scheduling information is used to schedule the first station to send an uplink data frame.
  • S430 receiving, according to the self-interference channel estimation information of the first channel, the uplink data frame that is sent by the first station according to the scheduling information on the first channel after the first time period;
  • the method for transmitting data based on out-of-band full-duplex sends scheduling information to a station on a first channel through an access point, and acquires self-interference channel estimation information of the first channel, thereby accessing
  • the point can receive, according to the self-interference channel estimation information, an uplink data frame sent by the station according to the scheduling information on the first channel; and at the same time, the access point sends the downlink to the station on a second channel with a different carrier frequency than the first channel.
  • the data frame enables the out-of-band full-duplex communication of the communication node and improves the spectral efficiency of the system.
  • the embodiment of the present invention is described by taking the method 400 performed by the AP as an example.
  • the present invention is not limited thereto, and other network devices may also perform the method, for example, the base station, the network control device, and the like may perform the method.
  • sending the scheduling information to the first station on the first channel includes:
  • the scheduling information includes at least one of the following information: each The uplink data transmission duration of the first station, the uplink data transmission duration of the first station with the largest uplink data transmission duration, the uplink data transmission duration upper limit, and the uplink data transmission duration lower limit.
  • the starting time of transmitting the scheduling information on the first channel is the same as the starting time of sending the downlink data frame on the second channel.
  • the method 400 further includes:
  • the first station and the second station do not include the same site, and the start time of sending the scheduling information on the first channel is sent on the second channel.
  • the start time of the downlink data frame is the same, the time length T UL of the uplink data frame and the time length T DL of the downlink data frame satisfy one of the following relational expressions (1) to (4):
  • T 1 , T 2 , and T 3 represent time lengths of the first time period, the second time period, and the third time period, respectively;
  • Tt represents a length of time for transmitting the scheduling information;
  • T ACK_UL represents the uplink response frame.
  • T ACK_DL indicates the length of time of the downlink response frame;
  • T UL MAX indicates the upper limit of the uplink data transmission duration;
  • T UL MIN indicates the lower limit of the duration of the uplink data transmission.
  • the downlink data frame is sent to the second site on the second channel, including:
  • the time length of the uplink data frame when the starting time of sending the scheduling information on the first channel is the same as the starting time of sending the downlink data frame on the second channel
  • the time length T DL of the T UL and the downlink data frame satisfies one of the following relations (5) to (8):
  • T 1 , T 2 , T 3 , and T 4 represent time lengths of the first time period, the second time period, the third time period, and the fourth time period, respectively;
  • Tt represents a time when the scheduling information is sent. Length; T ACK_UL indicates the length of time of the uplink response frame; T ACK_DL indicates the length of time of the downlink response frame; T UL MAX indicates the upper limit of the uplink data transmission duration; T UL MIN indicates the lower limit of the uplink data transmission duration.
  • the time lengths of the first time period, the second time period and the third time period are equal and both are short inter-frame intervals SIFS.
  • 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 method for transmitting data based on out-of-band full-duplex sends scheduling information to a station on a first channel through an access point, and acquires self-interference channel estimation information of the first channel, thereby accessing
  • the point can receive, according to the self-interference channel estimation information, an uplink data frame sent by the station according to the scheduling information on the first channel; and at the same time, the access point sends the downlink to the station on a second channel with a different carrier frequency than the first channel.
  • the data frame can thereby realize the out-of-band full-duplex communication of the communication node, improve the spectrum efficiency of the system, and can simplify the complexity of the system and improve the performance of the system.
  • a method for transmitting data based on out-of-band full-duplex according to an embodiment of the present invention is described in detail from the perspective of an access point, which will be described from the perspective of a station in conjunction with FIG. 10 and FIG. A method for transmitting data based on out-of-band full duplex according to an embodiment of the present invention.
  • FIG. 10 illustrates an out-of-band full-duplex based transmission data method 500, which may be performed, for example, by a station STA, in accordance with another embodiment of the present invention. As shown in FIG. 10, the method 500 includes:
  • S510 Receive scheduling information sent by an access point AP on a first channel, where the scheduling information is used.
  • the scheduling station sends an uplink data frame;
  • S540 Acquire self-interference channel estimation information of the second channel in a fourth time period from the start of sending the uplink data frame.
  • the method for transmitting data based on the out-of-band full-duplex receives the scheduling information sent by the access point through the station, and sends the uplink data frame to the access point on the first channel according to the scheduling information; Receiving, by the station, the downlink data frame sent by the access point on the second channel different from the first channel, until the station starts to send the uplink data frame, and acquiring the self-interference channel estimation information of the second channel, where the station According to the self-interference channel estimation information, the downlink data frame transmitted by the access point can be continuously received on the second channel, thereby enabling out-of-band full-duplex communication of the communication node, and the spectrum efficiency of the system can be improved.
  • receiving the scheduling information sent by the access point AP on the first channel including:
  • the scheduling information includes at least one of the following information: an uplink data transmission duration of each scheduled station, an uplink data transmission duration of a station with the largest uplink data transmission duration, The upper limit of the uplink data transmission duration and the lower limit of the uplink data transmission duration.
  • the starting time of receiving the scheduling information on the first channel is the same as the starting time of receiving the downlink data frame on the second channel.
  • the method 500 further includes:
  • the time length of the uplink data frame when the start time of receiving the scheduling information on the first channel is the same as the start time of receiving the downlink data frame on the second channel
  • the time length T DL of the T UL and the downlink data frame satisfies one of the following relations (9) to (12):
  • T 1 , T 2 , T 3 , and T 4 represent time lengths of the first time period, the second time period, the third time period, and the fourth time period, respectively;
  • Tt represents a time when the scheduling information is sent. Length; T ACK_UL indicates the length of time of the uplink response frame; T ACK_DL indicates the length of time of the downlink response frame; T UL MAX indicates the upper limit of the uplink data transmission duration; T UL MIN indicates the lower limit of the uplink data transmission duration.
  • the time lengths of the first time period, the second time period, the third time period, and the fourth time period are equal and are all short inter-frame intervals SIFS.
  • 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 method for transmitting data based on the out-of-band full-duplex receives the scheduling information sent by the access point through the station, and sends the uplink data frame to the access point on the first channel according to the scheduling information; Receiving, by the station, the downlink data frame sent by the access point on the second channel different from the first channel, until the station starts to send the uplink data frame, and acquiring the self-interference channel estimation information of the second channel, where the station According to the self-interference channel estimation information, the downlink data frame sent by the access point can be continuously received on the second channel, thereby enabling out-of-band full-duplex communication of the communication node, improving the spectrum efficiency of the system, and simplifying the system.
  • the complexity of the system improves the performance.
  • system and “network” are used interchangeably herein.
  • the term “and/or” in this context is merely an association describing the associated object, indicating that there may be three relationships, for example, A and / or B, which may indicate that A exists separately, and both A and B exist, respectively. B these three situations.
  • the character "/" in this article generally indicates that the contextual object is an "or" relationship.
  • B corresponding to A means that B is associated with A, and B can be determined according to A.
  • determining B from A does not mean that B is only determined based on A, and that B can also be determined based on A and/or other information.
  • an embodiment of the present invention further provides an access point 700 based on out-of-band full-duplex transmission data, where the access point 700 includes a processor 710, a memory 720, a bus system 730, a receiver 740, and Transmitter 750.
  • the processor 710, the memory 720, the receiver 740 and the transmitter 750 are connected by a bus system 730 for storing instructions for executing instructions stored in the memory 720 to control the receiver 740 to receive. Signaling and controlling the transmitter 750 to send a signal;
  • the transmitter 750 is configured to send scheduling information to the first station on the first channel, where the scheduling information is used to schedule the first station to send an uplink data frame.
  • the processor 710 is configured to acquire self-interference channel estimation information of the first channel in a first time period after the transmitter 750 sends the scheduling information.
  • the receiver 740 is configured to receive, according to the self-interference channel estimation information of the first channel acquired by the processor 710, the uplink sent by the first station according to the scheduling information on the first channel after the first time period.
  • Data Frame
  • the transmitter 750 is further configured to: send a downlink data frame to the second station on the second channel, where the uplink data frame received by the receiver 740 and the downlink data frame sent by the transmitter 750 are partially in time or All overlap, and the first channel is different from the carrier frequency of the second channel.
  • the access point in the embodiment of the present invention sends scheduling information to the station on the first channel through the access point, and acquires self-interference channel estimation information of the first channel, so that the access point can estimate according to the self-interference channel.
  • Information on the first channel, receiving an uplink data frame sent by the station according to the scheduling information; at the same time, the access point sends a downlink data frame to the station on a second channel different from the first channel, thereby enabling communication Out-of-band full-duplex communication of nodes and improved spectral efficiency of the system.
  • the processor 710 may be a central processing unit (Central) Processing Unit (referred to as "CPU”).
  • the processor 710 can also be other general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), off-the-shelf programmable gate arrays (FPGAs), or other programmable logic. Devices, discrete gates or transistor logic devices, discrete hardware components, etc.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the memory 720 can include read only memory and random access memory and provides instructions and data to the processor 710. A portion of the memory 720 can also include a non-volatile random access memory. For example, the memory 720 can also store information of the device type.
  • the bus system 730 may include a power bus, a control bus, a status signal bus, and the like in addition to the data bus. However, for clarity of description, various buses are labeled as bus system 730 in the figure.
  • each step of the foregoing method may be completed by an integrated logic circuit of hardware in the processor 710 or an instruction in a form of software.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in memory 720, and processor 710 reads the information in memory 720 and, in conjunction with its hardware, performs the steps of the above method. To avoid repetition, it will not be described in detail here.
  • the transmitter 750 is specifically configured to:
  • the scheduling information sent by the transmitter 750 includes at least one of the following information: an uplink data transmission duration of each of the first stations, and the first uplink data transmission duration is the largest.
  • the start time of the transmitter 750 transmitting the scheduling information on the first channel is the same as the starting time of sending the downlink data frame on the second channel.
  • the transmitter 750 is further configured to: after the receiver 740 receives the uplink data frame, and after a second time period, send an uplink response frame to the first station;
  • the receiver 740 is further configured to: after the transmitter 750 sends the downlink data frame and after the And receiving, by the second station, a downlink response frame sent by the second station, where the uplink response frame and the downlink response frame do not overlap each other in time.
  • the first station and the second station do not include the same site, and the start time of sending the scheduling information on the first channel is sent and the downlink is sent on the second channel.
  • the start time of the data frame is the same, the time length T UL of the uplink data frame and the time length T DL of the downlink data frame satisfy one of the following relational expressions (1) to (4):
  • T 1 , T 2 , and T 3 represent time lengths of the first time period, the second time period, and the third time period, respectively;
  • Tt represents a length of time for transmitting the scheduling information;
  • T ACK_UL represents the uplink response frame.
  • T ACK_DL indicates the length of time of the downlink response frame;
  • T UL MAX indicates the upper limit of the uplink data transmission duration;
  • T UL MIN indicates the lower limit of the duration of the uplink data transmission.
  • the transmitter 750 is further configured to:
  • the receiver 740 At the time when the receiver 740 starts receiving the uplink data frame, suspending transmitting the downlink data frame to the second station on the second channel, and continuing to the second station on the second channel after the fourth time period And sending the downlink data frame, so that the second station acquires the self-interference channel estimation information of the second channel in the fourth time period.
  • the length of time T of the uplink data frame satisfies one of the following relations (5) to (8):
  • T 1 , T 2 , T 3 , and T 4 represent time lengths of the first time period, the second time period, the third time period, and the fourth time period, respectively;
  • Tt represents a time when the scheduling information is sent. Length; T ACK_UL indicates the length of time of the uplink response frame; T ACK_DL indicates the time length of the downlink response frame; T UL MAX indicates the upper limit of the uplink data transmission duration; T UL MIN indicates the lower limit of the uplink data transmission duration.
  • the time lengths of the first time period, the second time period, and the third time period are equal and are all short inter-frame intervals SIFS.
  • the access point 700 in accordance with an embodiment of the present invention may correspond to the access point 100 in an embodiment of the present invention, and that the above and other operations and/or functions of the various modules in the access point 700 are respectively implemented to implement FIG.
  • the corresponding flow of the method 400 in FIG. 9 is omitted here for brevity.
  • the access point in the embodiment of the present invention sends scheduling information to the station on the first channel through the access point, and acquires self-interference channel estimation information of the first channel, so that the access point can estimate according to the self-interference channel.
  • Information, on the first channel receiving an uplink data frame sent by the station according to the scheduling information; at the same time, the access point sends a downlink data frame to the station on a second channel different from the first channel, thereby enabling communication
  • Out-of-band full-duplex communication of nodes improves the spectrum efficiency of the system and simplifies system complexity and improves system performance.
  • an embodiment of the present invention further provides a station 800 for transmitting data based on out-of-band full duplex, the station 800 including a processor 810, a memory 820, a bus system 830, a receiver 840, and a transmitter 850.
  • the processor 810, the memory 820, the receiver 840, and the transmitter 850 are connected by a bus system 830 for storing instructions for executing instructions stored in the memory 820 to control the receiver 840 to receive. Signaling, and controlling the transmitter 850 to send a signal;
  • the receiver 840 is configured to receive scheduling information sent by the access point AP on the first channel, where the scheduling information is used by the scheduling station to send an uplink data frame.
  • the transmitter 850 is configured to send the uplink data frame to the AP on the first channel according to the scheduling information after the receiver 840 receives the scheduling information and after a first time period;
  • the receiver 840 is further configured to: receive the downlink data frame sent by the AP on the second channel until the transmitter 850 starts to send the uplink data frame, where the uplink data frame sent by the transmitter 850 and the receiver 840 Receiving the downlink data frame partially or completely overlapping in time, and the first channel is different from the carrier frequency of the second channel;
  • the processor 810 is configured to acquire self-interference channel estimation information of the second channel in a fourth time period in which the transmitter 850 starts transmitting the uplink data frame.
  • the receiver 840 is further configured to: after receiving the fourth time period, continue to receive the AP transmission on the second channel according to the self-interference channel estimation information of the second channel acquired by the processor 810.
  • the station in the embodiment of the present invention receives the scheduling information sent by the access point through the station, and sends an uplink data frame to the access point on the first channel according to the scheduling information.
  • the carrier is different from the first channel in the carrier frequency. Receiving a downlink data frame sent by the access point until the station starts transmitting the uplink data frame, and acquiring self-interference channel estimation information of the second channel, so that the station can estimate the information according to the self-interference channel
  • the downlink channel continues to receive the downlink data frame sent by the access point, thereby enabling out-of-band full-duplex communication of the communication node and improving the spectrum efficiency of the system.
  • the processor 810 may be a central processing unit (“CPU"), and the processor 810 may also be other general-purpose processors, digital signal processors (DSPs). , an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, and the like.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the memory 820 can include read only memory and random access memory and provides instructions and data to the processor 810. A portion of the memory 820 may also include a non-volatile random access memory. For example, the memory 820 can also store information of the device type.
  • the bus system 830 may include a power bus, a control bus, a status signal bus, and the like in addition to the data bus. However, for clarity of description, various buses are labeled as bus system 830 in the figure.
  • each step of the foregoing method may be completed by an integrated logic circuit of hardware in the processor 810 or an instruction in a form of software.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory 820, and the processor 810 reads the information in the memory 820 and completes the steps of the above method in combination with its hardware. To avoid repetition, it will not be described in detail here.
  • the receiver 840 is specifically configured to:
  • the scheduling information received by the receiver 840 includes at least one of the following information: an uplink data transmission duration of each scheduled station, and an uplink of a station with the largest uplink data transmission duration.
  • the data transmission duration, the upper limit of the uplink data transmission duration, and the lower limit of the uplink data transmission duration is not limited.
  • the start time of the receiver 840 receiving the scheduling information on the first channel is the same as the starting time of receiving the downlink data frame on the second channel.
  • the receiver 840 is further configured to: after the transmitter 850 sends the uplink data frame, and after a second time period, receive an uplink response frame sent by the AP;
  • the transmitter 850 is further configured to: after the receiver 840 receives the downlink data frame, and after a third time period, send a downlink response frame to the AP, where the uplink response frame and the downlink response frame are not in time overlapping.
  • the length of time T of the uplink data frame satisfies one of the following relations (9) to (12):
  • T 1 , T 2 , T 3 , and T 4 represent time lengths of the first time period, the second time period, the third time period, and the fourth time period, respectively;
  • Tt represents a time when the scheduling information is sent. Length; T ACK_UL indicates the length of time of the uplink response frame; T ACK_DL indicates the length of time of the downlink response frame; T UL MAX indicates the upper limit of the uplink data transmission duration; T UL MIN indicates the lower limit of the uplink data transmission duration.
  • the time lengths of the first time period, the second time period, the third time period, and the fourth time period are equal and are all short inter-frame intervals SIFS.
  • site 800 in accordance with an embodiment of the present invention may correspond to the site 200 in an embodiment of the present invention, and that the above and other operations and/or functions of the various modules in the site 800 are respectively implemented to implement the methods of FIGS. 10 and 11.
  • the corresponding process of 500 is not repeated here for brevity.
  • the station in the embodiment of the present invention receives the scheduling information sent by the access point through the station, and sends an uplink data frame to the access point on the first channel according to the scheduling information. Meanwhile, the station is in the carrier frequency. Receiving, on a second channel different from the first channel, a downlink data frame sent by the access point until the station starts to send the uplink data frame, and acquiring self-interference channel estimation information of the second channel, so that the station can be based on the self-interference The channel estimation information continues to receive the downlink data frame sent by the access point on the second channel, thereby enabling out-of-band full-duplex communication of the communication node, improving the spectrum efficiency of the system, and simplifying system complexity and improving System performance.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, or an electrical, mechanical or other form of connection.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiments of the present invention.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit is implemented in the form of a software functional unit and sold as a separate product When sold or used, it can be stored on a computer readable storage medium.
  • the technical solution of the present invention contributes in essence or to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium.
  • a number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

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

Abstract

La présente invention concerne un procédé de transmission de données basé sur duplex intégral hors bande, un point d'accès et une station. Le procédé comprend les étapes suivantes : envoi des informations de programmation à une première station sur un premier canal, lesdites informations de programmation étant utilisées pour la programmation de la première station pour envoyer une trame de données de liaison montante ; dans une première période après l'envoi des dites informations de programmation, l'acquisition d'informations d'estimation d'autobrouillage de canal du premier canal ; en fonction des informations d'estimation d'autobrouillage de canal du premier canal et après ladite première période, la réception de la trame de données de liaison montante envoyée sur le premier canal par la première station en fonction des informations de programmation ; et l'envoi d'une trame de données de liaison descendante à une seconde station sur un second canal, une partie ou la totalité de la durée de la trame de données de liaison montante et de la trame de données de liaison descendante se chevauchant, mais la fréquence porteuse du premier canal et du second canal étant différente. Le procédé de transmission de données basé sur duplex intégral hors bande, le point d'accès et la station présentés dans les modes de réalisation de la présente invention peuvent mettre en œuvre une communication en duplex intégral hors bande de nœuds de communication et améliorer l'efficacité du spectre de fréquences d'un système.
PCT/CN2014/086595 2014-09-16 2014-09-16 Procédé de transmission de données hors-bande basé sur duplex intégral, point d'accès et station Ceased WO2016041137A1 (fr)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1993904A (zh) * 2004-05-13 2007-07-04 威德菲公司 具检测及媒体接入控制的非变频中继器
CN101491140A (zh) * 2006-07-14 2009-07-22 高通股份有限公司 无线通信系统中的可配置下行链路和上行链路信道
CN102035785A (zh) * 2010-11-12 2011-04-27 清华大学 一种用于宽带无线通信系统的频分双工传输方法
WO2011160253A1 (fr) * 2010-06-21 2011-12-29 Nokia Siemens Networks Oy Signalisation de liaison terrestre mixte hors bande/dans la bande ou en duplex intégral/semi-duplex dans des réseaux à relais améliorés
CN102792755A (zh) * 2010-03-09 2012-11-21 高通股份有限公司 使用采用轮询的edca进行多用户上行链路通信

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1993904A (zh) * 2004-05-13 2007-07-04 威德菲公司 具检测及媒体接入控制的非变频中继器
CN101491140A (zh) * 2006-07-14 2009-07-22 高通股份有限公司 无线通信系统中的可配置下行链路和上行链路信道
CN102792755A (zh) * 2010-03-09 2012-11-21 高通股份有限公司 使用采用轮询的edca进行多用户上行链路通信
WO2011160253A1 (fr) * 2010-06-21 2011-12-29 Nokia Siemens Networks Oy Signalisation de liaison terrestre mixte hors bande/dans la bande ou en duplex intégral/semi-duplex dans des réseaux à relais améliorés
CN102035785A (zh) * 2010-11-12 2011-04-27 清华大学 一种用于宽带无线通信系统的频分双工传输方法

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