WO2015074237A1 - 一种数据传输方法和数据传输设备 - Google Patents

一种数据传输方法和数据传输设备 Download PDF

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Publication number
WO2015074237A1
WO2015074237A1 PCT/CN2013/087657 CN2013087657W WO2015074237A1 WO 2015074237 A1 WO2015074237 A1 WO 2015074237A1 CN 2013087657 W CN2013087657 W CN 2013087657W WO 2015074237 A1 WO2015074237 A1 WO 2015074237A1
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WO
WIPO (PCT)
Prior art keywords
channel
idle
frame
subchannel
sub
Prior art date
Application number
PCT/CN2013/087657
Other languages
English (en)
French (fr)
Inventor
杨讯
马驰翔
李云波
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2013/087657 priority Critical patent/WO2015074237A1/zh
Priority to CN201910288778.XA priority patent/CN109995495A/zh
Priority to CN201380076303.5A priority patent/CN105164958A/zh
Publication of WO2015074237A1 publication Critical patent/WO2015074237A1/zh
Priority to US15/160,897 priority patent/US10063362B2/en
Priority to US16/045,214 priority patent/US10554373B2/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0091Signaling for the administration of the divided path
    • H04L5/0094Indication of how sub-channels of the path are allocated
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053Allocation of signaling, i.e. of overhead other than pilot signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • H04W24/02Arrangements for optimising operational condition
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W28/00Network traffic management; Network resource management
    • H04W28/02Traffic management, e.g. flow control or congestion control
    • H04W28/06Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H04W28/065Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information using assembly or disassembly of packets
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/08Non-scheduled access, e.g. ALOHA

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a data transmission method and a data transmission device. Background technique
  • the transmission rate of a communication system can be increased by a multi-dimensional implementation, such as: improving transmission power, increasing system bandwidth, and improving spectral efficiency.
  • increasing system bandwidth is one of the easiest and most effective methods. Therefore, most communication systems increase system bandwidth as much as possible.
  • dedicated frequency bands are very expensive.
  • mobile communication system operators can effectively operate a mobile communication network, such as a Long Term Evolution (LTE) network, if they can obtain 100 MHz bandwidth.
  • LTE Long Term Evolution
  • PHY physical layer
  • MIMO Multiple Input Multiple Output
  • MAC Media Access Control
  • This application file is mainly for the latter case, and an effective scheme for utilizing spectrum resources in a network based on competitive access.
  • the sender of the data uses a dynamic request to send/clear transmission protocol in order to better know which sub-channels are available and available.
  • Request To Send/Clear To Send, RTS/CTS Request To Send/Clear To Send, RTS/CTS).
  • RTS is used to transmit the RTS request in multiple consecutive subchannels. After receiving the RTS in the corresponding subchannel, the receiving end determines that the channel is idle and replies to the CTS; the transmitting end receives the received The CTS knows the specific channel idle condition.
  • both RTS and CTS carry bandwidth information in order to indicate how wide the bandwidth of the current request is. For example: There are four consecutive channels 1, 2, 3, 4, where channel 3 is busy and other channels are idle. Due to The scheme uses a limited number of bits (3 bits) to indicate the bandwidth (BW), which causes the receiving end and the transmitting end to not support discrete multi-channel signals. Then, when the receiving end judges that the channel is busy on channel 3, Although channel 4 is idle, the receiving end can only reply to CTS on channel 1 and channel 2. The transmitting end sends data to the receiving end on channel 1 and channel 2 according to the CTS fed back by the receiving end.
  • BW bandwidth
  • the transmitting end can only communicate with the receiving end in five modes: 20 MHz of the primary channel. , 40MHz including the primary channel, 80MHz including the primary channel, and 160MHz and discontinuous 160MHz including the primary channel, and the frequency of the secondary channel (partial channel of the non-primary channel) must be higher than the frequency of the primary channel, otherwise it cannot Indicate these possible combinations.
  • the BW is used to indicate the BW, and the location relationship of the frequency band is used, so that it cannot indicate the combination of the discontinuous subchannels.
  • the continuous subchannel adopts the above scheme, it cannot indicate all the continuous bandwidth combinations, for example, the 60MHz bandwidth composed of consecutive subchannels cannot be indicated.
  • the above scheme indicates that the subchannel has a large limitation and cannot indicate all combinations of subchannels. Summary of the invention
  • the embodiments of the present invention provide a data transmission method and a data transmission device, which are used to indicate all combinations of various subchannels.
  • An embodiment of the present invention provides a data transmission method, including:
  • the transmitting end sends a channel request frame to the first receiving end in at least two subchannels
  • the sending end After receiving the channel response frame from the first receiving end, the sending end parses the channel response frame to obtain second channel indication information, where the second channel indication information indicates a subchannel for transmitting the channel response frame; determining to send the channel The subchannel of the response frame is idle;
  • Data is transmitted to the first receiving end in a subchannel determined to be idle.
  • the subchannel of the channel response frame indicated by the second channel indication information is discontinuous.
  • the channel request frame further carries first channel indication information, where the first channel indication information indicates a subchannel that is sent by the channel request frame.
  • the method before sending data to the first receiving end in the subchannel determined to be idle, the method further includes:
  • Determining whether the idle subchannel can be fully used if not, transmitting a channel request frame to the second receiving end in the at least two subchannels, and if applicable, using orthogonal frequency division in the idle subchannel Data is transmitted to the first receiving end in a multiplexing, orthogonal frequency division multiple access or frequency division multiplexing manner.
  • the determining whether the idle subchannel can be fully used includes:
  • the primary channel, if not included, is determined to be underutilized.
  • the sending end is located in the first basic service group, in combination with the implementation manner of the first aspect, the first possible implementation manner, or the second possible implementation manner.
  • the at least two subchannels include subchannels of the second basic service group.
  • the sending end is a basic service group connection
  • the first possible implementation manner, or the second possible implementation manner Entry points including:
  • the transmitting end sends the channel request frame to the first receiving end in the at least two subchannels, where the access point is in the Transmitting a channel request frame in all subchannels of the basic service group;
  • sending, by the sending end, the channel request frame to the first receiving end in the at least two subchannels includes: the access point sending a channel request in an idle subchannel that does not include the primary channel in the basic service group frame.
  • a seventh possible implementation if the primary channel of the basic service group is idle according to the channel response frame, and the basic service group has a busy sub- Channel; determining whether the busy subchannel is busy due to data transmission within the basic service group, and if not, determining that the busy subchannel is an idle subchannel.
  • a second aspect of the present invention provides a data transmission method, including:
  • the first receiving end After receiving the channel request frame from the transmitting end, the first receiving end determines whether it is the destination receiving end of the channel request frame. If the determination result is yes, and the subchannel corresponding to the request frame is idle, Transmitting, in the idle subchannel, a channel response frame to the transmitting end, where the channel response frame carries the second channel indication information, where the second channel indication information indicates the subchannel that the channel response frame transmits;
  • Data from the transmitting end is received in a subchannel transmitting a channel response frame.
  • the subchannels sent by the channel response frame are discontinuous.
  • the method further includes:
  • the channel response frame from the destination receiving end of the channel request frame is received within the packet control function frame interval, it is determined that the subchannel corresponding to the channel request frame is busy.
  • the method further includes:
  • the frame determines that the network allocation vector of the subchannel corresponding to the channel request frame does not need to be updated.
  • the first basic The service is the basic service group where the first receiving end is located; before the sending the channel response frame to the sending end, the service further includes:
  • determining whether the subchannel corresponding to the channel request frame is available includes:
  • the communication status of the group determines the subchannel corresponding to the channel request frame in the channel request Whether the frame is available within the requested time.
  • the communications record includes:
  • the method further includes:
  • the method further includes:
  • the primary channel and all the subchannels are idle, indicating that the channel is idle may continue the fallback process; if the primary channel is idle, the internal molecular channel of the basic service group where the access point is located is busy, and the partial subchannel is busy due to the When the data transmission in the basic service group is caused, the channel is indicated to be busy and the rollback process is suspended.
  • a third aspect of the present invention provides a data transmission device, including:
  • a request sending unit configured to send, as the transmitting end, a channel request frame to the first receiving end in at least two subchannels
  • a response receiving unit configured to receive a channel response frame from the first receiving end after the request sending unit sends the channel request frame
  • An idle determining unit configured to parse the channel response frame to obtain second channel indication information after the response receiving unit receives the channel response frame from the first receiving end, where the second channel indication information indicates that the channel response frame is sent Subchannel; determining that the subchannel that sent the channel response frame is idle;
  • a data sending unit configured to send data to the first receiving end in the subchannel determined by the idle determining unit to be idle.
  • the idle determining unit configured by the second channel indication information indicated by the second channel indication information that is parsed, is configured to send the channel response frame.
  • the subchannels are not continuous.
  • the request sending unit the channel request frame used for sending also carries first channel indication information, where the first channel indication information indication The channel requests a subchannel transmitted by the frame.
  • the data transmission device further includes:
  • a sufficiency determining unit configured to determine whether an idle subchannel determined by the idle determining unit can be fully used
  • the request sending unit is further configured to: if the sufficiency determining unit determines that the result is not possible, send a channel request frame to the second receiving end in the at least two subchannels;
  • the data sending unit is configured to: if the sufficiency determining unit determines that the result is ok, use orthogonal frequency division multiplexing, orthogonal frequency division multiple access, or frequency division multiplexing in the idle subchannel.
  • the first receiving end sends data.
  • the sufficiency determining unit is configured to determine the number of idle subchannels and the number of subchannels that send the channel request frame. Whether the ratio is greater than a predetermined threshold, and if so, it is determined that it has not been fully used, otherwise the determination may be fully used; or, whether the primary channel is included in the idle subchannel, if not included, it is determined that it has not been fully used.
  • the data transmission device is located in the first basic service group. ;
  • the request sending unit is configured to send a subchannel of the at least two subchannels of the channel request frame that includes a second basic service group.
  • the data transmission device if the data transmission device is a basic service group An access point, the data transmission device further includes:
  • a first terminal determining unit configured to determine whether a basic service group where the access point is located has a specific terminal as a receiving end
  • the request sending unit is configured to: if the first terminal determining unit determines that the result is exist, Transmitting a channel request frame in all subchannels of the basic service group; if the first terminal determining unit determines that the result is not present, transmitting a channel request frame in an idle subchannel not including the primary channel in the basic service group .
  • the idle determining unit is further configured to determine, according to the channel response frame, that a primary channel of the basic service group is idle, and The basic service group has a busy subchannel; then it is determined whether the busy subchannel is busy caused by data transmission in the basic service group, and if not, it is determined that the busy subchannel is an idle subchannel.
  • a fourth aspect of the present invention provides a data transmission device, including:
  • a request receiving unit configured to receive, as the first receiving end, a channel request frame from the transmitting end, and a destination determining unit, configured to determine, after the request receiving unit receives the channel request frame from the transmitting end, whether the channel request frame is the channel Destination receiving end;
  • a response sending unit configured to: if the destination determining unit determines that the result is yes, and the subchannel corresponding to the request frame is idle, sending a channel response frame to the transmitting end in the idle subchannel, where the channel response frame carries a second channel indication information, where the second channel indication information indicates a subchannel to which the channel response frame is transmitted;
  • a data receiving unit configured to receive data from the transmitting end in a subchannel in which the dependent transmitting unit sends a channel response frame.
  • the response sending unit is configured to send a subchannel discontinuity of the channel response frame.
  • the data transmission device further includes:
  • a monitoring unit configured to: if the destination determining unit determines that the first receiving end is not the destination end of the channel request frame, receive the subchannel corresponding to the channel request frame, and receive the channel from the channel after the short frame interval length a channel response frame of the destination receiving end of the request frame;
  • a busy determining unit configured to: if the listening unit receives a channel response frame from a destination receiving end of the channel request frame within a packet control function frame interval, determine that the subchannel corresponding to the channel request frame is busy.
  • the data transmission device also includes:
  • a vector setting unit configured to set a network allocation vector of the subchannel corresponding to the channel request frame according to the duration indication information in the channel response frame received by the monitoring unit; if the monitoring unit is within the packet control function frame interval, If the channel response frame from the destination receiving end of the channel request frame is not received, it is determined that the network allocation vector of the subchannel corresponding to the channel request frame does not need to be updated.
  • the data transmission device further includes:
  • a channel determining unit configured to determine whether a subchannel corresponding to the request frame is a subchannel of the second basic service group, where the first basic service is a basic service group where the first receiving end is located;
  • an availability determining unit configured to determine, if the channel determining unit determines that the subchannel corresponding to the channel request frame is a subchannel of the second basic service group, whether the subchannel corresponding to the channel request frame is available;
  • the response sending unit is configured to send a channel response frame to the sending end if the availability determining unit determines that the result is available.
  • the availability determining unit is configured to determine that the subchannel corresponding to the channel request frame does not receive the And determining, by the signal of the second basic service group, that the subchannel corresponding to the channel request frame is available; or determining, by using the communication state of the second basic service group, that the subchannel corresponding to the channel request frame is requested by the channel request frame Is it available within the time?
  • the availability determining unit specifically for determining whether the subchannel is available, includes: terminal cache information of the second basic service group At least one of queue information, competition window information, and back time information.
  • the data transmission device is further Includes:
  • a second terminal determining unit configured to determine whether a basic service group where the access point is located has a specific terminal as a receiving end
  • the response sending unit is configured to: if the second terminal determining unit determines that the result is that, the channel response frame is not sent in all the subchannels; if the second terminal determining unit determines that the result is not saved The channel response frame is transmitted in the idle subchannel that does not include the primary channel in the basic service group in which the access point is located.
  • the data transmission device further includes:
  • a fallback flow control unit configured to: if the primary channel and all the subchannels are idle, indicating that the channel is idle, the flowback process may continue; if the primary channel is idle, the internal molecular channel of the basic service group where the access point is located is busy, and the The partial subchannel busy is caused by data transmission within the basic service group, indicating that the channel is busy and keeping the backoff process suspended.
  • the channel response frame from the receiving end carries the second channel indication information
  • the second channel indication information can indicate the subchannel transmitted by the channel response frame, so that the transmitting end can know that the channel response frame is sent. What are the subchannels and determine that these subchannels are idle. Rather than being limited to the continuous bandwidth combination of the 3bit indication, it is possible to break through the limitation of the positional relationship of the frequency bands, thereby indicating all combinations of the various subchannels.
  • FIG. 1 is a schematic flowchart of a method according to an embodiment of the present invention.
  • FIG. 2 is a schematic flowchart of a method according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a process for confirming an idle channel of a single user by a single user according to an embodiment of the present invention
  • FIG. 4 is a schematic flowchart of a method according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of a frame format according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a process for confirming an idle channel of a multi-user according to an embodiment of the present invention
  • FIG. 7 is a schematic flowchart of a method according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a network according to an embodiment of the present invention.
  • FIG. 9 is a schematic flowchart of a method according to an embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of a network according to an embodiment of the present invention.
  • 11 is a schematic flowchart of an idle confirmation process of a primary channel according to an embodiment of the present invention.
  • FIG. 13 is a schematic structural diagram of a data transmission device according to an embodiment of the present invention.
  • FIG. 14 is a schematic structural diagram of a data transmission device according to an embodiment of the present invention.
  • FIG. 15 is a schematic structural diagram of a data transmission device according to an embodiment of the present invention.
  • 16 is a schematic structural diagram of a data transmission device according to an embodiment of the present invention.
  • FIG. 17 is a schematic structural diagram of a data transmission device according to an embodiment of the present invention.
  • FIG. 18 is a schematic structural diagram of a data transmission device according to an embodiment of the present invention.
  • FIG. 19 is a schematic structural diagram of a data transmission device according to an embodiment of the present invention.
  • 20A is a schematic structural diagram of a data transmission device according to an embodiment of the present invention.
  • 20B is a schematic structural diagram of a data transmission device according to an embodiment of the present invention.
  • 21 is a schematic structural diagram of a data transmission device according to an embodiment of the present invention.
  • FIG. 22 is a schematic structural diagram of a data transmission device according to an embodiment of the present invention.
  • FIG. 23 is a schematic structural diagram of a mobile phone according to an embodiment of the present invention. detailed description
  • the embodiment of the invention provides a data transmission method, as shown in FIG. 1 , which includes:
  • the transmitting end sends the channel request frame to the first receiving end in the at least two subchannels. Further, the channel request frame further carries the first channel indication information, where the first channel indication information indicates the channel request frame transmission. Subchannel.
  • the use of the first channel indication information to indicate the subchannel to which the channel request frame is transmitted allows the receiving end to obtain more reliable information. Even if the channel request frame is not received in some subchannels, the sender can still know on which channels the channel request frame is sent by the receiver.
  • the embodiment of the present invention further provides that the solution of the embodiment of the present invention is applied to the overlapping basic service.
  • Overlapping Basic Service Set (OBSS) scenario to further improve the spectrum utilization efficiency of the network.
  • This embodiment mainly focuses on the basic service set (BSS) in the OBSS scenario, and further utilizes the idle channel of the neighbor BSS to assist in temporarily transmitting a larger amount of data, as follows:
  • the foregoing sending end is located in the first basic service group.
  • the at least two subchannels include the subchannels of the second basic service group. That is, the first basic service group is the basic service group where the sender is located, and the second basic service group is the other basic service group except the first basic service group.
  • the embodiment of the present invention further provides that the solution of the embodiment of the present invention is applied to an OBSS scenario to further improve the spectrum utilization efficiency of the network.
  • This embodiment mainly focuses on the BSS in the OBSS scenario, and further utilizes the idle channel of the BSS, as follows: If the foregoing sending end is an access point of the basic service group, the foregoing step 101 further includes: before sending the channel request frame:
  • the sending end sends the channel request frame to the first receiving end in the at least two subchannels, where the access point is in the basic service group. Transmitting a channel request frame in all subchannels;
  • the transmitting end transmitting the channel request frame to the first receiving end in the at least two subchannels includes: the access point transmitting the channel request frame in the idle subchannel not including the primary channel in the basic service group.
  • the above specific terminal refers to a terminal that does not use or does not support the method flow shown in FIG. 1.
  • Step 102 After receiving the channel response frame from the first receiving end, the sending end parses the channel response frame to obtain second channel indication information, where the second channel indication information indicates a subchannel that sends the channel response frame, and determines that the channel response is sent.
  • the subchannel of the frame is idle;
  • the sub-channel indicating the channel response frame transmission in the channel response frame can be used to obtain more reliable information from the transmitting end. Even if the channel response frame is not received in some subchannels, the transmitting end can still know whether the receiving end transmits the channel response frame in these subchannels through the information.
  • the subchannels transmitting the channel response frame indicated by the second channel indication information are discontinuous.
  • the scheme in the background art can only utilize a continuous idle frequency band, and there is a case where the frequency band resources are wasted.
  • the channel 4 is wasted, so the background resource scheme resource resource usage rate is low.
  • the transmitting end since the transmitting end receives the idle subchannel discontinuity corresponding to the channel response frame, that is, the transmitting end receives the channel response frame on the discrete subchannel, Therefore, the transmitting end can accurately determine whether each subchannel is idle, and then transmit data in the idle subchannel in a discrete manner, thereby avoiding waste of channel resources, thereby improving frequency band resource usage.
  • the embodiment of the present invention further provides a channel decision implementation scheme before data transmission: before transmitting data to the first receiving end in the subchannel determined to be idle, the method further includes: determining whether the idle subchannel can be Fully used, if not, transmitting a channel request frame to the second receiving end in the at least two subchannels. If yes, the process of transmitting data in the subsequent 103 steps is specifically: using orthogonal frequency division multiplexing in the idle subchannel And transmitting data to the first receiving end by orthogonal frequency division multiple access or frequency division multiplexing. A more detailed explanation will be given in the subsequent second embodiment.
  • the step of "transmitting a channel request frame to the second receiving end in the at least two subchannels" will be repeatedly performed.
  • the embodiment of the present invention further provides how to determine whether the currently idle subchannel can be fully used, as follows:
  • the foregoing determining whether the idle subchannel can be fully used includes: determining the number of idle subchannels and sending Whether the ratio of the number of subchannels of the channel request frame is greater than a predetermined threshold, and if so, determining that it is not fully used, otherwise determining that it can be fully used; or determining whether the primary channel is included in the idle subchannel, and if not, determining that the channel is not sufficient use.
  • the embodiment of the present invention further provides another scenario for determining whether a subchannel is idle in a scenario in which a primary channel exists.
  • the specific method is as follows: if the primary channel of the basic service group is idle according to the channel response frame, and the basic service group is There is a busy subchannel; then it is determined whether the busy subchannel is busy due to data transmission in the basic service group, and if not, it is determined that the busy subchannel is an idle subchannel.
  • the channel response frame from the receiving end carries the second channel indication information
  • the second channel indication information may indicate the subchannel transmitted by the channel response frame, so that the transmitting end can learn the sub-channel that sent the channel response frame. What are the channels and it is determined that these subchannels are idle. Rather than being limited to the continuous bandwidth combination indicated by the 3bit, it is possible to break through the limitation of the positional relationship of the frequency bands, thereby indicating the overall combination of the seed channels.
  • An embodiment of the present invention further provides another data transmission method, as shown in FIG. 2, including: 201: a first receiving end receives a channel request frame from a transmitting end; The above channel request frame may be received in at least two subchannels.
  • the first receiving end After receiving the channel request frame from the sending end, the first receiving end determines whether it is the destination receiving end of the channel request frame. If the determination result is yes, and the subchannel corresponding to the request frame is idle, the idle end is idle. Transmitting, in the subchannel, a channel response frame to the transmitting end, where the channel response frame carries the second channel indication information, where the second channel indication information indicates the subchannel to which the channel response frame is sent. In this step, the second channel indication information is used to indicate the channel request.
  • the subchannel transmitted by the frame allows the receiver to obtain more reliable information. Even if no response frame or request frame is received in some subchannels, the sender can still use the information to know on which channels the receiving end sent the response frame or the request frame.
  • the second channel indication information indicates that the subchannel of the channel response frame is transmitted, and the subchannel transmitted by the channel response frame is discontinuous.
  • the scheme in the background art can only utilize a continuous idle frequency band, and there is a case where the frequency band resources are wasted.
  • the channel 4 is wasted, so the background resource scheme has a lower band resource usage rate.
  • the transmitting end since the transmitting end receives the idle subchannel discontinuity corresponding to the channel response frame, that is, the transmitting end receives the channel response frame on the discrete subchannel, so that the transmitting end can accurately determine whether each subchannel is idle.
  • the data is then transmitted in the idle subchannel in a discrete manner, thereby avoiding waste of channel resources and thereby improving the utilization of the frequency band resources.
  • the embodiment of the present invention further provides a processing scheme for the receiving end to receive the request frame but is not the destination end of the request frame. If the first receiving end determines that it is not the destination end of the channel request frame, the method further includes:
  • the channel response frame from the destination receiving end of the channel request frame is received within the packet control function frame interval, it is determined that the subchannel corresponding to the channel request frame is busy.
  • the embodiment of the present invention further provides an update scheme of the network allocation vector, which is specifically as follows: After receiving the channel response frame from the destination receiving end of the channel request frame, the method further includes:
  • the embodiment of the present invention further provides a scenario in which an embodiment of the present invention is applied to an overlapping Over Service Basic Service Set (OBSS) scenario to further improve the spectrum utilization efficiency of the network.
  • OBSS Over Service Basic Service Set
  • This embodiment mainly focuses on the basic service set (BSS) in the OBSS scenario, and further utilizes the idle channel of the neighbor BSS to assist in temporarily transmitting a larger amount of data, as follows: If the subchannel corresponding to the channel request frame is The sub-channel of the second basic service group, where the first basic service is the basic service group where the first receiving end is located; before the sending the channel response frame to the sending end, the method further includes:
  • the embodiment of the present invention further provides a determining scheme of whether a subchannel is available, and the foregoing may be as follows: determining whether the subchannel corresponding to the channel request frame is available is:
  • Determining that the subchannel corresponding to the channel request frame does not receive the signal of the second basic service group within a predetermined duration determining that the subchannel corresponding to the channel request frame is available; or, by using the communication status of the second basic service group It is determined whether the subchannel corresponding to the channel request frame is available in the time requested by the channel request frame.
  • the embodiment of the present invention provides an optional solution for the communication state, which may be specifically as follows:
  • the foregoing communication record includes: terminal cache information, queue information, contention window information, and rollback time information of the second basic service group. At least one. It should be noted that a communication record that can be used to determine whether a subchannel is available is possible. The above examples are not to be construed as limiting the embodiments of the present invention.
  • the embodiment of the present invention further provides that the solution of the embodiment of the present invention is applied to the OBSS scenario to further improve the spectrum utilization efficiency of the network.
  • the present embodiment mainly focuses on the BSS in the OBSS scenario, and further utilizes the idle channel of the BSS, as follows: If the first receiving end is the access point of the basic service group, the foregoing step 202 includes:
  • the above specific terminal refers to a terminal that does not use or does not support the method flow shown in FIG. 1.
  • 203 Receive data from the transmitting end in a subchannel that transmits a channel response frame.
  • the channel response frame sent by the receiving end carries the second channel indication information, where the second channel indication information can flexibly indicate the subchannel transmitted by the channel response frame, so that the transmitting end can know that the channel response is sent. What are the subchannels of the frame, and it is determined that these subchannels are idle. Rather than being limited to the continuous bandwidth combination indicated by the 3 bit, it is possible to break through the limitation of the positional relationship of the frequency bands, and thus it is possible to break the limitation of the positional relationship of the frequency bands, thereby indicating all combinations of the various subchannels.
  • the embodiment of the present invention further provides a control method for the fallback process.
  • the method further includes: if the primary channel and all the subchannels are idle, indicating that the channel is idle may continue the rollback process; if the primary channel is idle, the foregoing
  • the internal molecular channel of the basic service group is busy, and the above partial subchannels are busy due to data transmission in the above basic service group, indicating that the channel is busy and the backoff process is suspended.
  • FIG. 3 includes four channels (Channel), which are respectively channel 1 to channel 4.
  • the request (Request) is sent.
  • the transmitted channel request frame, response (Response) or no response (No Response) refers to the channel response frame or no channel response frame
  • the data (Data) refers to the data transmission.
  • the flow of Figure 2 can be described as:
  • Step 1 The transmitting end sends a channel request frame (Request) to the receiving end in multiple subchannels.
  • the channel request frame is preferably in the same format, and carries channel indication information, indicating in which channels the current channel request frame is sent. .
  • the channel request frame uses the same format to facilitate the receiver to correctly demodulate data when receiving data in any one of the subchannels.
  • Step 2 After receiving the channel request frame on each subchannel, the receiving end first determines whether it is the The destination receiving end of the channel request frame. If the receiving end is the destination receiving end, the channel response frame is determined and transmitted according to the idle condition in the subchannel: if the channel is idle, the channel response frame is sent; if the channel is busy, the channel response frame is not sent.
  • the channel response frames of the idle subchannels preferably use the same format and carry channel indication information indicating which channels of the current channel response frames are transmitted.
  • a subchannel indicating the transmission of a channel response frame in a channel response frame allows the receiving end to obtain more reliable information. Even if no response frame is received in some subchannels, the sender can still use this information to know which channels the receiving end sent the response frame on.
  • Step 3 The transmitting end receives the channel response frame in the subchannel that has transmitted the channel request frame, and sends the data to the receiving end in the subchannel that receives the channel response frame. It can be understood that since no channel response frame is received in channel 3, no data is transmitted in channel 3 during subsequent data transmission.
  • the following further steps are performed to solve the problem in the case that the receiving end is not the destination receiving end, and the specifics may be as follows:
  • the receiving end further receives the channel response frame in the subchannel on the channel request frame within a Short Inter-frame Space (SIFS) time length (the channel response frame is the destination receiving)
  • SIFS Short Inter-frame Space
  • the non-destination receiving end receives the channel response frame in the packet control function Inter-frame Space (PIFS) (PIFS>SIFS), and determines that the subchannel is busy, and Setting the NAV of the subchannel according to the duration indication information in the channel response frame (network allocation vector, indicating the length of time that the current channel is occupied by other clients (Station, STA)); if the non-destination receiving end in the PIFS is in the above If the channel response frame is not received in the subchannel, it is determined that the NAV in the subchannel does not need to be updated.
  • PIFS packet control function Inter-frame Space
  • channel indication information needs to be carried in the channel request frame and the channel response frame shown in FIG. 3 and FIG.
  • One possible frame format is shown in Table 1.
  • the channel request frame and the channel response frame can adopt the same format.
  • the frame control mainly indicates the type and feature of the frame, and the duration is used to indicate the length of time occupied by the frame or the desired length of the sender.
  • RA Receiveiver Address
  • Receiver address, TA indicates the address of the sender
  • Number of Channels indicates how many subchannels are transmitted in the local area
  • Channel Info n indicates the information of the nth channel, which may include the channel number or the center frequency of the channel, and the frame check
  • FCS Frame Check Sequence
  • FCS is used by the receiving end to verify that the frame is received correctly. Among them, Number of Channels and Channel Info 1 ⁇ ! !
  • the channel indication information is carried, and the channel indication information of the current request/response may be indicated.
  • the channels here are all in units of basic channel units. A typical example is: The channel unit is 20MHz.
  • the acknowledgment for multiple idle subchannels and the flowchart for NAV settings include the following steps:
  • the sending STA sends a Request on the idle channel and carries the channel indication information. Since both the receiving STA1 and the receiving STA2 are listening on the idle channel, both the receiving STA1 and the receiving STA2 receive the Request.
  • the receiving STA1 (the destination receiving end) receives the Request; the receiving STA2 (the non-destination receiving end) receives the Request, and further waits for the Response on the channel indicated by the Request;
  • the receiving STA1 determines to reply the response to the transmitting STA in the idle subchannel; the receiving STA1 sends the Response and carries the idle channel indication information; since the receiving STA2 also listens to the channel transmitted by the Response, the Response is also received by the receiving STA2.
  • the sending STA receives the Response, and determines an idle channel according to the channel and the carried information of the Response, and then sends the data in the idle channel.
  • the receiving STA2 receives the Response on the channel indicated by the Request, and if it is received, sets the NAV of the subchannel corresponding to the Response, otherwise does not update the NAV of the subchannel.
  • an indication information bit may be added in the Frame Control to indicate the number of channels and Channel Info 1 ⁇ ! ! (Channel Information)
  • the two-part channel indicates the presence of a domain.
  • this information bit can also exist at locations such as Duration/RA/TA. Embodiments of the invention do not limit their location.
  • the receiving end can effectively separate and obtain the current indicated number of channels, the Number of Channels indication field can also be omitted.
  • the channel response frame sent by the channel response frame may also use a bitmap to encapsulate its channel indication information.
  • the subchannel indicated by the channel request frame sent by the transmitting end is indicated by a bitmap.
  • the bitmap can be indicated as 10100100 or 10110000.
  • the first indication mode corresponds to the physical location of the channel
  • the second indication mode corresponds to the logical location of the channel: the channels indicated by the channel request frame are sequentially numbered, and the channels 1, 2, 3, 6 are pressed.
  • the sequence numbers are 1, 2, 3, 4, and are mapped to the first 4 bits of the bitmap; the receiver indicates that the channel is available or the channel is unavailable by setting the first four bits of the bitmap to 1 or 0, respectively.
  • the bitmap can use 1 for the channel to be available, or 0 for the channel to be available. This embodiment of the present invention does not impose any restrictions on this.
  • the Channel bitmap of the channel response frame is optional and indicates its presence or absence through a message bit located before the Channel bitmap.
  • the transmitting end can directly transmits data in its idle subchannel and indicates channel indication information in data (data)
  • the receiving end can be in ACK/BA (Acknowledgement/ Block ACK).
  • acknowledgment/block acknowledgment carries the channel indication information of the response.
  • Figure 5 A possible format is shown in Figure 5, where channel indication information is placed in the BA.
  • the format indicated in FIG. 5 is the channel number or the channel center frequency, it is also possible to carry the compressed bitmap information, which is not restricted by the present invention.
  • FIG. 5 it contains frame control (frame control), duration/identity (continuous time) / Identity, ID), receiver address (RA), sender address (TA), BA control (BA Control), BA information (BA Information), and frame checksum ⁇ 'J (Frame Check Sequence, FCS), where the BA Information carries: Block Ack Starting Sequence Control and Block Ack bitmap, and the Block Ack bitmap carries channel information (Channel Info). ⁇ n, the number of bytes occupied by each field is displayed.
  • This embodiment extends the mode to support multi-user transmission on the basis of the first embodiment.
  • 6 is an example of Orthogonal Frequency Division Multiple Access/Frequency Division Multiplexing Access (OFDMA/FDMA).
  • the transmission method may be other methods such as Orthogonal Frequency Division Multiple (OFDM), and the transmission mode of the multi-user may be more than 4, which is not limited in the embodiment of the present invention.
  • OFDM Orthogonal Frequency Division Multiple
  • the schematic diagram of the idle channel confirmation of the multi-user shown in FIG. 6 is similar to the first embodiment in the process.
  • the extension of this embodiment is that the sending end can send multiple times (the destination receiving end only needs to send each time) a), sending a channel request frame to multiple destination receivers.
  • the specific process is as follows: Step 1: The sender sends a channel request frame (Request) to the receiver in multiple subchannels.
  • the channel request frame is in the same format and carries channel indication information, indicating which channels the channel request frame is sent in.
  • Step 2 After receiving the channel request frame on each subchannel, the receiving end first determines whether it is the destination receiving end of the channel request frame. If the receiving end is the destination receiving end, the channel response frame is determined and transmitted according to the idle condition in the subchannel: if the channel is idle, the channel response frame is sent; if the channel is busy, the channel response frame is not sent.
  • the channel response frames transmitted on the idle subchannels may be in the same format and carry channel indication information indicating which channels the channel response frames are transmitted in.
  • Step 3 The transmitting end receives the channel response frame in the subchannel that has sent the channel request frame, and determines whether the current idle channel can be fully used. If it is not fully used, replace one receiving end and return to step one; if it can be fully used Then, in the subchannel that receives the channel response frame, the data is transmitted by the OFDMA/FDMA method to the requested receiving end.
  • the criterion for whether the channel can be fully used may be: 1.
  • the number of subchannels that are currently receiving the channel response frame (possibly the response subchannels of multiple users, and the union of them) is greater than a certain threshold value of the number of subchannels that have sent the channel request frame at the transmitting end.
  • Nrsp the ratio of subchannels that have sent the channel request frame at the transmitting end.
  • the primary channel (primary channel, primary channel, used for transmitting data frames, control frames, and management frames) is already included in the subchannel that currently receives the channel response frame. If the primary channel is not included, it is judged to be insufficiently used.
  • step 3 in addition to determining whether the channel is fully used, if the transmitting end itself is ready to adopt a multi-user transmission mode (for example, OFDMA/FDMA), the steps of the embodiment may be used to request and respond multiple times.
  • a multi-user transmission mode for example, OFDMA/FDMA
  • step three when the transmitting end uses OFDMA/FDMA to send data to multiple destination receiving ends, the bandwidth selected by the destination receiving end and the receiving end for each destination can be determined by the transmitting end.
  • the specific implementation method is flexible, and the embodiment of the present invention does not limit this.
  • This embodiment can be further represented by a flowchart, as shown in FIG.
  • the sending STA sends a Request to the destination STA on the idle channel and carries the channel indication information.
  • the destination STA receives the Response, and determines an idle channel according to the channel where the Response is located and the carried information.
  • the sending STA confirms the current idle subchannel according to the Response, and determines whether the current idle subchannel is fully utilized. If yes, enter 704, otherwise enter 705;
  • the sending STA sends data to the destination STA on the confirmed idle channel.
  • the schemes of the first embodiment and the second embodiment are applied to overlapping basic service group (Overlapping BSS) scenarios to further improve the spectrum utilization efficiency of the network.
  • This embodiment mainly focuses on the basic service set (BSS) in the OBSS scenario, and further utilizes the idle channel of the neighbor BSS to assist in temporarily transmitting a larger amount of data.
  • BSS basic service set
  • One flow of this embodiment is to utilize a subchannel (off channel) that is not a BSS channel to help transmit data.
  • FIG. 8 a schematic diagram of the utilization of Off Channel when two BSSs overlap.
  • the BSS1 corresponding to Access Point 1 operates on channels 5 and 6, and the BSS2 corresponding to AP2 operates on channels 1, 2 and 3. If in STAS1, STA1 located in the overlapping area of BSS1 and BSS2 does not send a signal with API, STA1 has occupied channel 5, then STA2 in AP2 and BSS2 can use the channel of BSS1 to initiate data transmission during this period to support Temporary large data volume transfer.
  • This embodiment is based on the first embodiment and the second embodiment in the flow.
  • the API requires a new flow to ensure that BSS1 can or cannot utilize a channel other than the BSS (BSS2).
  • BSS2 BSS2
  • STA2 is the sender
  • AP2 is the receiver. Keep step 3 unchanged.
  • steps 1 and 2 the details are as follows:
  • Step 1 STA2 sends a channel request frame (Request) to the receiving end in multiple subchannels including the off channel, and the channel request frames sent in the multiple subchannels are in the same format, and carry channel indication information, indicating the channel request frame. In which channels are sent.
  • Request a channel request frame
  • the channel request frames sent in the multiple subchannels are in the same format, and carry channel indication information, indicating the channel request frame. In which channels are sent.
  • Step 2 After receiving the channel request frame on each subchannel, the AP2 first determines whether the AP2 is the destination receiving end of the channel request frame. If the AP2 is the destination receiving end, it is determined according to the idle condition of the AP2 in the foregoing subchannel and whether it is available (the judgment of whether it is available only applies to the off channel, and the channel of the BSS where the AP2 is located, that is, the channel of the BSS2 is not applicable) And transmitting a channel response frame: if the channel is idle, transmitting a channel response frame; if the channel is busy, not transmitting a channel response frame.
  • the channel response frames transmitted on the idle subchannels may be in the same format and carry channel indication information indicating which channels the channel response frames are transmitted in.
  • Step 3 STA2 receives the channel response frame in the subchannel that has sent the channel request frame, and determines whether the current idle channel can be fully used. If not fully used, replace one AP and return to step one; if it can be fully used, In the subchannel receiving the channel response frame, the data is transmitted by the OFDMA/FDMA method to the currently requested receiving end. The AP determines whether the idle channel is currently fully available. If not yet fully used, the AP also sends a channel response frame in other idle channels that do not receive the channel request frame. The destination address of the part of the channel response frame is other possible except STA2. STA. This step is an optional step.
  • Step 4 STA2 uses OFDMA/FDMA in the subchannel that receives the channel response frame. Send data to the receiver that was requested this time. If other STAs receive a channel response frame whose destination address is the STA on other subchannels, the other subchannels transmit data simultaneously with STA2 by OFDMA/FDMA.
  • the AP For the idle condition of the off channel subchannel in step 2, the AP needs to add the flow shown in Figure 9 to further confirm the availability of the off channel.
  • the "signal of receiving other BSSs on the off channel within a fixed duration" is a history record at the AP, and the AP can determine, according to the record, whether signals from other BSSs are received in the time indicated in the request frame of the STA.
  • the criterion for judging is only a feasible criterion. In practice, there may be multiple criteria for judging, for example, by judging information between adjacent APs. In this case, ⁇ collects the Buffer/Queue information of the STA in the BSS (even information such as the contention window and the back-off time) and interacts with the adjacent APs.
  • the AP can determine whether signals from other BSSs are received on the off channel during the time indicated in the STA's request frame.
  • Another alternative method is that the AP directly collects information about STAs in neighboring BSSs (such as Buffer/Queue information, or information such as contention window and backoff time), and according to the information. make judgement. Please refer to FIG. 9 as follows:
  • the process of determining the AP when receiving the request on the off channel includes the following steps:
  • the AP receives the channel request frame on the off channel, that is, the channel that receives the channel request frame includes an off channel;
  • the AP determines whether the Off channel is idle, and if it is idle, enters 903, otherwise the channel request frame is not responded to;
  • the AP determines whether a signal of another BSS is received on the off channel within a fixed duration, and if yes, determines that the off channel is unavailable, and responds to the channel request frame; if not, determines that the off channel is available, and responds to the channel request. frame.
  • This embodiment can also be applied to the downlink off channel transmission.
  • the process is basically the same as the above process, but it should be noted that the subject of the judgment is still the AP, and the STA is not responsible for the signals from the adjacent BSS:
  • Step 1 The AP determines whether the off channel is available.
  • Step 2 If the off channel is available, the AP sends a channel request frame (Request) to the STA in multiple subchannels including the off channel, and all channel request frames sent may be in the same format. And carrying channel indication information, indicating which channels of the current channel request frame are sent.
  • Step 3 After receiving the channel request frame on each subchannel, the STA first determines whether it is the destination receiving end of the channel request frame. If the STA is the destination receiving end, the channel response frame is determined and transmitted according to the idle condition of the STA in the subchannel: if the channel is idle, the channel response frame is sent; if the channel is busy, the channel response frame is not sent. All channel response frames transmitted on each idle subchannel may be in the same format and carry channel indication information indicating in which channels the channel response frame is transmitted.
  • Step 4 The AP receives the channel response frame in the subchannel that has sent the channel request frame, and determines whether the current idle channel can be fully used. If not, the AP replaces one STA and returns to step one; if it can be fully used, In the subchannel that receives the channel response frame, the data is transmitted to the currently requested STA by OFDMA/FDMA.
  • the solutions of the first embodiment and the second embodiment are applied to the OBSS scenario to further improve the spectrum utilization efficiency of the network.
  • This embodiment mainly focuses on the BSS in the OBSS scenario, and further utilizes the idle channel of the BSS.
  • FIG. 10 a schematic diagram of a network structure for utilizing redundant channels when two BSSs overlap, as shown in FIG. 10 in this embodiment, still uses two AP scenarios: BSS1 operates channels 1 and 2, The operational channels of BSS2 are 1, 2 and 3. If in STAS1, STA1 and API located in the overlapping area of BSS1 and BSS2 transmit signals on channels 1 and 2 or API transmits signals on channels 1 and 2, AP2 cannot communicate with STA2 in BSS2 on channels 1 and 2. However, AP2 can also use channel 3 to communicate with STA2 in BSS2 to increase the data transmission time in BSS2 and improve the throughput of the network.
  • This embodiment is the same as the first embodiment (single user) or the second embodiment (multiple user) in the flow of channel request and response (steps 1, 2 and 3).
  • the AP needs to make further judgments on whether there is an old version of the STA (legacy STA) in the current BSS, and is classified into the following. Two situations:
  • AP2 When AP2 is the receiving end, if there is an old version of the STA in the current BSS2, it does not respond to the channel request frame of the transmitting end in all subchannels; if there is no old version in the current BSS The STA responds to the channel request frame of the sender only in the idle subchannel (excluding the primary channel). For the scenario shown in Figure 10, as shown in Figure 11, the STA sends a request, and the flow chart of the AP response includes three channels, channel 1, channel 2, and channel 3, where channel 1 is the primary channel, then STA2 transmits the channel. Request frame (RTS2), then AP2 will not transmit channel response frames (no channel response frames) in channel 1 and channel 2, and channel response frames will be transmitted on channel 3.
  • RTS2 Request frame
  • the channel request frame is sent in all the subchannels; if there is no old version of the STA in the current BSS2, only the idle subchannel ( The channel request frame is sent in the primary channel.
  • the process of determining whether the channel is idle is as shown in FIG. 12, and the main purpose of the process is to prevent other STAs from discovering that the AP initiates full channel transmission when the primary channel is idle, resulting in AP and STA.
  • the ongoing secondary channel transmission failed. Specifically, the following steps are included:
  • the STA detects that the primary channel is idle, and proceeds to the next step 1202.
  • 1202 Determine whether all subchannels of the BSS are idle, if idle, enter 1203, otherwise enter 1204;
  • the reason for further determining whether the sub-channel is busy is caused by data transmission in the BSS or data transmission of other BSSs, and if it is caused by data transmission of other BSSs, proceed to step 1203; If the data transmission of the BSS is caused, then enter 1205;
  • the channel of the STA is busy, keep the back off process paused, and cannot send a signal.
  • the back off process corresponding to the above steps is based on whether the channel of the STA indicated by the STA is idle or busy. If the signal of the BSS is detected in all subchannels of the BSS, the current channel is considered to be busy.
  • the NAV of the plurality of subchannels in the first embodiment is different, and the NAV of each subchannel merely indicates that the subchannel is idle or busy; and the channel that determines the STA's back off process is idle or busy is only one. Further, in the process of FIG.
  • the STA needs to determine whether the busyness of the subchannel is caused by the signal of the BSS or the signal of the other BSS. Therefore, the STA needs to save the address of the sender corresponding to the NAV, and the address of the sender may be a MAC address or an association. Associate Identifier (AID).
  • AID Associate Identifier
  • Another feasible back off process is that the STA or AP works only on the primary channel, that is, when the primary channel is idle, the back off timer begins to decrease. In this case, in order to make the scheme 4 of the embodiment work well, the STA may perform the transmission on the secondary channel if the secondary channel is idle when the back off timer is not decremented by d to 0.
  • the transmission time on the above "secondary channel” is determined according to the NAV value of the primary channel (for example, the transmission duration of the known neighbor BSS on the primary channel).
  • each STA needs to have a second back off, and the second back off only starts when the original back off is suspended and the secondary channel is idle. .
  • the specific workflow is consistent with the first back off.
  • the solution of the embodiment of the present invention can be applied to the BSS operating in the full frequency band (that is, there is no BSS channel, and each BSS occupies all available subchannels; once the subchannel is found to be idle, the transmission can be initiated).
  • each BSS must have a primary channel, and the primary channels of adjacent BSSs are staggered (not overlapping) in the frequency band as much as possible.
  • the embodiment of the present invention further provides a data transmission device, as shown in FIG. 13, including: a request sending unit 1301, configured to send, as a transmitting end, a channel request frame to a first receiving end in at least two subchannels;
  • the response receiving unit 1302 is configured to receive a channel response frame from the first receiving end after the request sending unit 1301 sends the channel request frame;
  • the idle determining unit 1303 is configured to: after the response receiving unit 1302 receives the channel response frame from the first receiving end, parse the channel response frame to obtain second channel indication information, where the second channel indication information indicates that the channel response frame is sent. Subchannel; determining that the subchannel that transmitted the channel response frame is idle;
  • the data sending unit 1304 is configured to send data to the first receiving end in the subchannel determined by the idle determining unit 1303 to be idle.
  • the channel response frame from the receiving end carries the second channel indication information
  • the second channel indication information may indicate the subchannel transmitted by the channel response frame, so that the transmitting end can learn the sub-channel that sent the channel response frame. What are the channels and it is determined that these subchannels are idle. Rather than being limited to the continuous bandwidth combination indicated by the 3bit, it is possible to break through the limitation of the positional relationship of the frequency bands, thereby indicating the overall combination of the seed channels.
  • the idle determining unit 1303, the second channel indication information used for parsing The subchannel of the channel response frame transmitted by the indicated second channel indication information is discontinuous.
  • the scheme in the background art can only utilize a continuous idle frequency band, and there is a case where bandwidth resources are wasted. Specifically, in the example in the background art, the channel 4 is wasted, so the background resource scheme resource resource usage rate is low.
  • the transmitting end since the transmitting end receives the idle subchannel discontinuity corresponding to the channel response frame, that is, the transmitting end receives the channel response frame on the discrete subchannel, so that the transmitting end can accurately determine whether each subchannel is idle.
  • the data is then transmitted in the idle subchannel in a discrete manner, thereby avoiding waste of channel resources and thereby improving the utilization of the frequency band resources.
  • the request sending unit 1301 further includes first channel indication information, where the first channel indication information indicates a subchannel that is sent by the channel request frame.
  • employing a subchannel indicating channel response frame transmission in a channel response frame may enable the receiver to obtain more reliable information. Even if no response frame is received in some subchannels, the sender can still know whether the receiving end sends a response frame in these subchannels through the information.
  • the embodiment of the present invention further provides a channel decision implementation solution before the data is sent as follows:
  • the data transmission device further includes:
  • the sufficiency determining unit 1401 is configured to determine whether the idle subchannel determined by the idle determining unit 1303 can be fully used;
  • the request sending unit 1301 is further configured to: if the sufficiency determining unit 1401 determines that the result is not, send a channel request frame to the second receiving end in the at least two subchannels;
  • the data transmitting unit 1304 is configured to: if the sufficiency determining unit 1401 determines that the result is ok, use the method of orthogonal frequency division multiplexing, orthogonal frequency division multiple access, or frequency division multiplexing in the idle subchannel.
  • the first receiving end sends data.
  • the embodiment of the present invention further provides how to determine whether the currently idle subchannel can be fully used, as follows:
  • the foregoing sufficiency determining unit 1401 is configured to determine the number of idle subchannels and send the channel request frame. Whether the ratio of the number of subchannels is greater than a predetermined threshold, and if so, determining that it has not been fully used, otherwise determining that it can be fully used; or determining whether the primary channel is included in the idle subchannel, and if not, determining that it is not fully utilized.
  • the data transmission device is located in the first basic service group, and the request sending unit 1301 is configured to send the subchannel of the second basic service group among the at least two subchannels of the channel request frame.
  • the embodiment of the present invention further provides that the solution of the embodiment of the present invention is applied to an OBSS scenario to further improve the spectrum utilization efficiency of the network. This embodiment mainly focuses on the BSS in the OBSS scenario, and further utilizes the idle channel of the BSS, as follows: If the data transmission device is an access point of a basic service group, as shown in FIG. 15, the data transmission device further includes :
  • the first terminal determining unit 1501 is configured to determine whether a specific terminal in which the access point is located has a specific terminal as the receiving end;
  • the request sending unit 1301 is configured to: if the first terminal determining unit 1501 determines that the result is a presence, send a channel request frame in all subchannels of the basic service group where the access point is located; if the first terminal determining unit 1501 If the result of the determination is non-existent, the channel request frame is transmitted in the idle subchannel that does not include the primary channel in the basic service group in which the access point is located.
  • the embodiment of the present invention further provides another scheme for determining whether a subchannel is idle in a scenario in which a primary channel exists.
  • the idle determining unit 1303 is further configured to determine the basic service group according to the channel response frame. The primary channel is idle, and the basic service group has a busy subchannel; then it is determined whether the busy subchannel is busy due to data transmission in the basic service group, and if not, it is determined that the busy subchannel is idle.
  • the rollback process may be performed, otherwise the rollback process needs to be suspended.
  • the embodiment of the present invention further provides another data transmission device.
  • the method includes: a request receiving unit 1601, configured to receive, as a first receiving end, a channel request frame from a sending end; a destination determining unit 1602, configured to After receiving the channel request frame from the transmitting end, the request receiving unit 1601 determines whether it is the destination receiving end of the channel request frame;
  • the response sending unit 1603 is configured to: if the result determined by the destination determining unit 1602 is YES, and the subchannel corresponding to the request frame is idle, send a channel response frame to the transmitting end in the idle subchannel, where the channel response frame carries the first Two channel indication information, where the second channel indication information indicates a subchannel that is sent by the channel response frame;
  • the data receiving unit 1604 is configured to receive data from the transmitting end in a subchannel in which the dependent transmitting unit sends a channel response frame.
  • the channel response frame sent by the receiving end carries the second channel indication information, where the second channel indication information can flexibly indicate the subchannel transmitted by the channel response frame, so that the sending end It is possible to know which subchannels have transmitted the channel response frame, and to determine that these subchannels are idle. Rather than being limited to the continuous bandwidth combination indicated by the 3 bit, it is possible to break through the limitation of the positional relationship of the frequency bands, and thus it is possible to break the limitation of the positional relationship of the frequency bands, thereby indicating all combinations of the various subchannels.
  • the response sending unit 1603 is configured to send the subchannel discontinuity of the channel response frame.
  • the scheme in the background art can only utilize a continuous idle frequency band, and there is a case where the frequency band resources are wasted.
  • the channel 4 is wasted, so the background resource scheme has a low band resource usage rate.
  • the transmitting end since the transmitting end receives the idle subchannel discontinuity corresponding to the channel response frame, that is, the transmitting end receives the channel response frame on the discrete subchannel, so that the transmitting end can accurately determine whether each subchannel is idle.
  • the data is then transmitted in the idle subchannel in a discrete manner, thereby avoiding waste of channel resources and thereby improving the utilization of the frequency band resources.
  • the embodiment of the present invention further provides a processing scheme of the data transmission device that receives the request frame but is not the destination end of the request frame. As shown in FIG. 17, the data transmission device further includes:
  • the monitoring unit 1701 is configured to: if the destination determining unit 1602 determines that the first receiving end is not the destination end of the channel request frame, and listen to the subchannel corresponding to the channel request frame, and receive the channel request frame after the short frame interval length The channel response frame of the destination end;
  • the busy determining unit 1702 is configured to determine that the subchannel corresponding to the channel request frame is busy if the listening unit 1701 receives the channel response frame from the destination receiving end of the channel request frame within the packet control function frame interval.
  • the embodiment of the present invention further provides an update scheme of the network allocation vector, as follows: As shown in FIG. 18, the foregoing data transmission device further includes:
  • a vector setting unit 1801 configured to set a network allocation vector of the subchannel corresponding to the channel request frame according to the duration indication information in the channel response frame received by the monitoring unit 1701; if the foregoing listening unit 1701 is within the packet control function frame interval, If the channel response frame from the destination receiving end of the channel request frame is not received, it is determined that the network allocation vector of the subchannel corresponding to the channel request frame does not need to be updated.
  • the embodiment of the present invention further provides that the solution of the embodiment of the present invention is applied to an overlapping Over Service Basic Service Set (OBSS) scenario to further improve the spectrum utilization efficiency of the network.
  • OBSS Over Service Basic Service Set
  • BSS Basic Service Set
  • the idle channel of the neighboring BSS is further used to facilitate the temporary transmission of a larger amount of data, as follows:
  • the foregoing data transmission device further includes:
  • the channel determining unit 1901 is configured to determine whether the subchannel corresponding to the request frame is a subchannel of the second basic service group, where the first basic service is a basic service group where the first receiving end is located;
  • the availability determining unit 1902 is configured to determine, if the channel determining unit 1901 determines that the subchannel corresponding to the channel request frame is a subchannel of the second basic service group, determine whether the subchannel corresponding to the channel request frame is available;
  • the response sending unit 1603 is configured to send a channel response frame to the transmitting end if the availability determining unit 1902 determines that the result is available.
  • the embodiment of the present invention further provides a determining scheme of whether a subchannel is available, and the specificity determining unit 1902 is configured to determine that the subchannel corresponding to the channel request frame does not receive the foregoing in a predetermined duration. And determining, by the signal of the second basic service group, that the subchannel corresponding to the channel request frame is available; or determining, by using the communication state of the second basic service group, whether the subchannel corresponding to the channel request frame is within a time requested by the channel request frame Available.
  • the foregoing availability determining unit 1902 specifically for determining whether the subchannel is available, includes: terminal cache information of the second basic service group, At least J3 ⁇ 4 in the queue information, the competition window information, and the backoff time information.
  • the embodiment of the present invention further provides that the solution of the embodiment of the present invention is applied to the OBSS scenario to further improve the spectrum utilization efficiency of the network.
  • This embodiment mainly focuses on the BSS in the OBSS scenario, and further utilizes the idle channel of the BSS, as follows: If the data transmission device is an access point of a basic service group, as shown in FIG. 20A, the data transmission device further includes :
  • the second terminal determining unit 2001 is configured to determine whether a specific terminal in which the access point is located has a specific terminal as the receiving end;
  • the response sending unit 1603 is configured to: if the second terminal determining unit 2001 determines that the result is that, the channel response frame is not sent in all the subchannels; if the second terminal determining unit 2001 determines that the result is absent, The basic service group in which the access point is located does not include a transmission channel response frame in the idle subchannel of the primary channel.
  • the above specific terminal refers to a terminal that does not use or does not support the method flow shown in FIG. 1.
  • the embodiment of the present invention further provides a control scheme of the fallback process as follows:
  • the foregoing data transmission device further includes:
  • the fallback flow control unit 2002 is configured to: if the primary channel and all the subchannels are idle, indicating that the channel is idle, the flowback process may continue; if the primary channel is idle, the internal molecular channel of the basic service group where the access point is located is busy, and the foregoing part is The subchannel is busy due to data transmission within the above basic service group, indicating that the channel is busy and keeps the backoff process suspended.
  • the embodiment of the present invention further provides another data transmission device, which is used as a transmitting end of data, as shown in FIG. 21, and includes: a receiver 2101, a transmitter 2102, and a processor 2103; wherein, the transmitter 2102 For transmitting a channel request frame to the first receiving end in at least two subchannels; transmitting data to the first receiving end in a subchannel determined to be idle by the processor 2103; and receiving, by the receiver 2101, the receiving from the first receiving End channel response frame;
  • the processor 2103 is configured to: after the receiver 2101 receives the channel response frame from the first receiving end, parse the channel response frame to obtain second channel indication information, where the second channel indication information indicates the subchannel that sends the channel response frame. ; Determine that the subchannel that sent the channel response frame is idle.
  • the channel response frame from the receiving end carries the second channel indication information
  • the second channel indication information may indicate the subchannel transmitted by the channel response frame, so that the transmitting end can learn the sub-channel that sent the channel response frame. What are the channels and it is determined that these subchannels are idle. Rather than being limited to the continuous bandwidth combination indicated by the 3bit, it is possible to break through the limitation of the positional relationship of the frequency bands, thereby indicating the overall combination of the seed channels.
  • the channel request frame further carries first channel indication information, where the first channel indication information indicates a subchannel to which the channel request frame is transmitted;
  • the use of the first channel indication information to indicate the subchannel to which the channel request frame is transmitted allows the receiving end to obtain more reliable information. Even if the request frame is not received in some subchannels, the sender can still use the information to know which channels the receiver has sent the request frame on.
  • the subchannels transmitting the channel response frame indicated by the second channel indication information determined by the processor 2103 are discontinuous.
  • the scheme in the background art can only utilize a continuous idle frequency band, and there is a case where the frequency band resources are wasted.
  • the channel 4 is wasted, so the background resource scheme resource resource usage rate is low.
  • the transmitting end since the transmitting end receives the idle subchannel corresponding to the channel response frame is discontinuous, that is, the transmitting end is in a discrete subletter.
  • the channel receives the channel response frame, so that the transmitting end can accurately determine whether each subchannel is idle, and then transmit data in the idle subchannel in a discrete manner, thereby avoiding waste of channel resources, thereby improving band resource utilization.
  • the embodiment of the present invention further provides a channel decision implementation scheme before data transmission.
  • the processor 2103 is further configured to determine the idle before sending data to the first receiving end in a subchannel determined to be idle. Whether the subchannel can be fully used, if not, instructing the transmitter 2102 to send a channel request frame to the second receiving end in the at least two subchannels, and if so, indicating that the transmitter 2102 is in an idle subchannel
  • the data is sent to the first receiving end by orthogonal frequency division multiplexing, orthogonal frequency division multiple access or frequency division multiplexing.
  • the embodiment of the present invention further provides how to determine whether the currently idle subchannel can be fully used, as follows:
  • the foregoing processor 2103 is configured to determine whether the idle subchannel can be fully used. Whether the ratio of the number of idle subchannels to the number of subchannels transmitting the channel request frame is greater than a predetermined threshold, and if yes, determining that the usage is not fully utilized, otherwise determining that the use may be sufficient; or determining whether the idle subchannel includes the primary channel, If not included, it is determined that it has not been fully utilized.
  • the embodiment of the present invention further provides that the solution of the embodiment of the present invention is applied to an overlapping Over Service Basic Service Set (OBSS) scenario to further improve the spectrum utilization efficiency of the network.
  • OBSS Over Service Basic Service Set
  • This embodiment mainly focuses on the basic service set (BSS) in the OBSS scenario, and further utilizes the idle channel of the neighbor BSS to assist in temporarily transmitting a larger amount of data, as follows:
  • the above data transmission device is located in the first basic service.
  • the at least two subchannels include subchannels of the second basic service group.
  • the embodiment of the present invention further provides that the solution of the embodiment of the present invention is applied to an OBSS scenario to further improve the spectrum utilization efficiency of the network.
  • This embodiment mainly focuses on the BSS in the OBSS scenario, and further utilizes the idle channel of the BSS, as follows: If the sending end is an access point of the basic service group, the processor 2103 is further configured to determine the access point. Whether the basic service group has a specific terminal as the receiving end, and if so, instructing the transmitter 2102 to send a channel request frame in all the subchannels of the basic service group;
  • the transmitter 2102 is instructed to transmit a channel request frame in an idle subchannel that does not include a primary channel in the basic service group.
  • the above specific terminal refers to a terminal that does not use or does not support the method flow shown in FIG. 1.
  • the embodiment of the present invention further provides another scenario for determining whether a subchannel is idle in a scenario in which a primary channel exists.
  • the processor 2103 is further configured to determine, according to the channel response frame, a basic service group.
  • the busy channel is idle, and the basic service group has a busy subchannel; then it is determined whether the busy subchannel is busy due to data transmission in the basic service group, and if not, it is determined that the busy subchannel is an idle subchannel.
  • the data transmission device is used as a first receiving end, and includes: a receiver 2201, a transmitter 2202, and a processor 2203; wherein, the receiver 2201, configured to receive a channel request frame from a sending end, and receive data from the sending end in a subchannel that the transmitter 2202 sends a channel response frame;
  • the processor 2203 is configured to determine, after receiving the channel request frame from the sending end, whether it is the destination receiving end of the channel request frame, and if the determination result is yes, and the subchannel corresponding to the request frame is idle, indicating the transmitting
  • the transmitter 2202 sends a channel response frame to the transmitting end in the idle subchannel, where the channel response frame carries the second channel indication information, and the second channel indication information indicates the subchannel transmitted by the channel response frame;
  • the transmitter 2202 is configured to send a channel response frame to the transmitting end.
  • the subchannel indicating that the channel request frame is transmitted by using the second channel indication information can enable the receiving end to obtain more reliable information. Even if no response frame or request frame is received in some subchannels, the sender can still use the information to know which channels the receiving end sent the response frame or the request frame.
  • the channel response frame sent by the receiving end carries the second channel indication information, where the second channel indication information can flexibly indicate the subchannel transmitted by the channel response frame, so that the transmitting end can know that the channel response is sent. What are the subchannels of the frame, and it is determined that these subchannels are idle. Rather than being limited to the continuous bandwidth combination of the 3-bit indication, it is possible to break through the limitation of the positional relationship of the frequency bands, so that the limitation of the positional relationship of the frequency bands can be broken, thereby indicating all combinations of the various sub-channels.
  • the processor 2203 instructs the transmitter 2202 to transmit a subchannel discontinuity of the channel response frame.
  • the scheme in the background art can only utilize a continuous idle frequency band, and there is a case where the frequency band resources are wasted. Specifically, in the example in the background art, the channel 4 is wasted, so the background resource scheme resource resource usage rate is low.
  • the transmitting end since the transmitting end receives the idle subchannel discontinuity corresponding to the channel response frame, that is, the transmitting end receives the channel response frame on the discrete subchannel, The transmitting end can accurately determine whether each subchannel is idle, and then transmit data in the idle subchannel in a discrete manner, thereby avoiding waste of channel resources, thereby improving band resource utilization rate.
  • the embodiment of the present invention provides a processing scheme for the receiving end to receive the request frame but is not the destination end of the request frame.
  • the processor 2203 is further configured to: if the first receiving end determines that it is not the channel request.
  • the destination end of the frame receives the channel response frame from the destination receiving end of the channel request frame by using the receiver 2201 after listening to the subchannel corresponding to the channel request frame;
  • the receiver 2201 If the receiver 2201 receives the channel response frame from the destination receiving end of the channel request frame within the packet control function frame interval, it determines that the subchannel corresponding to the channel request frame is busy.
  • the embodiment of the present invention further provides an update scheme of a network allocation vector, which is specifically as follows:
  • the method further includes: after the receiver 2201 receives the channel response frame from the destination receiving end of the channel request frame, setting a network allocation of the subchannel corresponding to the channel request frame according to the duration indication information in the received channel response frame. If the receiver 2201 does not receive the channel response frame from the destination receiver of the channel request frame within the packet control function frame interval, it is determined that the network allocation vector of the subchannel corresponding to the channel request frame does not need to be updated.
  • the embodiment of the present invention further provides a scenario in which an embodiment of the present invention is applied to an overlapping Over Service Basic Service Set (OBSS) scenario to further improve the spectrum utilization efficiency of the network.
  • This embodiment mainly focuses on the basic service group (BSS) in the OBSS scenario, and further utilizes the idle channel of the neighbor BSS to assist in temporarily transmitting a larger amount of data, as follows: If the subchannel corresponding to the channel request frame is a sub-channel of the second basic service group, where the first basic service is a basic service group where the first receiving end is located; the processor 2203 is further configured to determine the foregoing before instructing the transmitter 2202 to send a channel response frame to the transmitting end. Whether the subchannel corresponding to the channel request frame is available, if available, instructing the transmitter 2202 to send a channel response frame to the transmitting end.
  • BSS basic service group
  • the embodiment of the present invention further provides a determining scheme of whether a subchannel is available, and the foregoing may be as follows:
  • the processor 2203 is configured to determine that, in a predetermined duration, the subchannel corresponding to the channel request frame does not receive the second basic service group. And determining, by the signal, the subchannel corresponding to the channel request frame is available; or determining, by using the communication state of the second basic service group, whether the subchannel corresponding to the channel request frame is available within a time requested by the channel request frame.
  • the foregoing communication record includes: the foregoing communication record used by the processor 2203 to determine whether the subchannel is available: the second basic service group At least one of terminal cache information, queue information, contention window information, and fallback time information.
  • the embodiment of the present invention further provides that the solution of the embodiment of the present invention is applied to an OBSS scenario to further improve the spectrum utilization efficiency of the network.
  • This embodiment mainly focuses on the BSS in the OBSS scenario, and further utilizes the idle channel of the BSS, as follows: If the data transmission device is an access point of a basic service group, the processor 2203 is further configured to determine an access point. Whether the specific service group in the basic service group is the receiving end. If it exists, the channel response frame is not sent in all the subchannels. If not, the primary service group in the basic service group where the access point is located does not include the primary channel. A channel response frame is transmitted in the idle subchannel.
  • the above specific terminal refers to a terminal that does not use or does not support the process of the method shown in Fig. 1.
  • the embodiment of the present invention further provides another data transmission device. As shown in FIG. 23, for the convenience of description, only parts related to the embodiment of the present invention are shown. For details that are not disclosed, refer to the embodiment of the present invention. Method part.
  • the data transmission device may be a terminal, and the terminal may be any terminal device including a mobile phone, a tablet computer, a personal digital assistant (PDA), a point of sale (POS), a car computer, and the like. example:
  • FIG. 23 is a block diagram showing a portion of the structure of a mobile phone associated with a terminal provided by an embodiment of the present invention.
  • the mobile phone includes: a radio frequency (RF) circuit 2310, a memory 2320, an input unit 2330, a display unit 2340, a sensor 2350, an audio circuit 2360, a wireless fidelity (WiFi) module 2370, and a processor 2380. And power supply 2390 and other components.
  • RF radio frequency
  • the structure of the handset shown in Figure 23 does not constitute a limitation to the handset, and may include more or fewer components than those illustrated, or some components may be combined, or different components may be arranged.
  • the RF circuit 2310 can be used for receiving and transmitting signals during the transmission or reception of information or during a call. Specifically, after receiving the downlink information of the base station, it is processed by the processor 2380. In addition, the uplink data is designed to be sent to the base station.
  • the RF circuit 2310 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a Low Noise Amplifier (LNA), a duplexer, and the like.
  • the RF circuit 2310 can also communicate with the network and other devices via wireless communication.
  • the above wireless communication can Use any communication standard or protocol, including but not limited to Global System of Mobile communication (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (Code Division Multiple Access) CDMA), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE), E-mail, Short Messaging Service (SMS), etc.
  • GSM Global System of Mobile communication
  • GPRS General Packet Radio Service
  • Code Division Multiple Access Code Division Multiple Access
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • LTE Long Term Evolution
  • E-mail Short Messaging Service
  • the memory 2320 can be used to store software programs and modules, and the processor 2380 executes various functional applications and data processing of the mobile phone by running software programs and modules stored in the memory 2320.
  • the storage 2320 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application required for at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may be stored according to Data created by the use of the mobile phone (such as audio data, phone book, etc.).
  • memory 2320 can include high speed random access memory, and can also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
  • the input unit 2330 can be used to receive input numeric or character information, as well as to generate key signal inputs related to user settings and function controls of the handset.
  • the input unit 2330 can include a touch panel 2331 and other input devices 2332.
  • the touch panel 2331 also referred to as a touch screen, can collect touch operations on or near the user (such as the user using a finger, a stylus, or the like on the touch panel 2331 or near the touch panel 2331. Operation), and drive the corresponding connecting device according to a preset program.
  • the touch panel 2331 can include two parts: a touch detection device and a touch controller.
  • the touch detection device detects the touch orientation of the user, and detects a signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts the touch information into contact coordinates, and sends the touch information
  • the processor 2380 is provided and can receive commands from the processor 2380 and execute them.
  • the touch panel 2331 can be implemented in various types such as resistive, capacitive, infrared, and surface acoustic waves.
  • the input unit 2330 may also include other input devices 2332.
  • other input devices 2332 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control buttons, switch buttons, etc.), trackballs, mice, joysticks, and the like.
  • the display unit 2340 can be used to display information input by the user or information provided to the user as well as a hand Various menus of the machine.
  • the display unit 2340 may include a display panel 2341.
  • the display panel 2341 may be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), or the like.
  • the touch panel 2331 may cover the display panel 2341. After the touch panel 2331 detects a touch operation on or near the touch panel 2331, the touch panel 2331 transmits to the processor 2380 to determine the type of the touch event, and then the processor 2380 according to the touch event. The type provides a corresponding visual output on display panel 2341.
  • the touch panel 2331 and the display panel 2341 are used as two independent components to implement the input and input functions of the mobile phone, in some embodiments, the touch panel 2331 and the display panel 2341 may be integrated. Realize the input and output functions of the phone.
  • the handset can also include at least one type of sensor 2350, such as a light sensor, motion sensor, and other sensors.
  • the light sensor may include an ambient light sensor and a proximity sensor, wherein the ambient light sensor may adjust the brightness of the display panel 2341 according to the brightness of the ambient light, and the proximity sensor may close the display panel 2341 and/or when the mobile phone moves to the ear. Or backlight.
  • the accelerometer sensor can detect the acceleration of each direction (usually three axes), and the magnitude and direction of gravity can be detected at rest.
  • gesture of the mobile phone such as horizontal and vertical screen switching, Related games, magnetometer attitude calibration), vibration recognition related functions (such as pedometer, tapping), etc.; other sensors such as gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc. that can be configured on the mobile phone, here No longer.
  • An audio circuit 2360, a speaker 2361, and a microphone 2362 provide an audio interface between the user and the handset.
  • the audio circuit 2360 can transmit the converted electrical data of the received audio data to the speaker 2361, and convert it into a sound signal output by the speaker 2361; on the other hand, the microphone 2362 converts the collected sound signal into an electrical signal, and the audio circuit 2360 After receiving, it is converted into audio data, and then processed by the audio data output processor 2380, transmitted to the other mobile phone via the RF circuit 2310, or outputted to the memory 2320 for further processing.
  • WiFi is a short-range wireless transmission technology.
  • the mobile phone can help users to send and receive e-mail, browse web pages and access streaming media through the WiFi module 2370. It provides users with wireless broadband Internet access.
  • FIG. 23 shows the WiFi module 2370, it can be understood that it does not belong to the essential configuration of the mobile phone, and can be omitted as needed within the scope of not changing the essence of the invention.
  • the processor 2380 is a control center of the mobile phone, and uses various interfaces and lines to connect the entire mobile phone. In part, by operating or executing software programs and/or modules stored in the memory 2320, and calling data stored in the memory 2320, various functions and processing data of the mobile phone are executed, thereby integrally monitoring the mobile phone.
  • the processor 2380 may include one or more processing units.
  • the processor 2380 may integrate an application processor and a modem processor, where the application processor mainly processes an operating system, a user interface, an application, and the like.
  • the modem processor primarily handles wireless communications. It will be appreciated that the above described modem processor may also not be integrated into the processor 2380.
  • the handset also includes a power supply 2390 (such as a battery) that powers the various components.
  • a power supply 2390 (such as a battery) that powers the various components.
  • the power supply can be logically coupled to the processor 2380 via a power management system to manage charging, discharging, and power management functions through the power management system.
  • the mobile phone may further include a camera, a Bluetooth module, and the like, and details are not described herein again.
  • the processor 2380 included in the terminal further has the following functions: if the mobile phone is used as a transmitting end, the processor 2380 is configured to receive a channel response frame from the first receiving end; After the channel response frame of the first receiving end, the channel response frame is parsed to obtain second channel indication information, the second channel indication information indicates a subchannel for transmitting the channel response frame, and the subchannel with the channel response frame is determined to be idle.
  • the channel response frame from the receiving end carries the second channel indication information
  • the second channel indication information may indicate the subchannel transmitted by the channel response frame, so that the transmitting end can learn the sub-channel that sent the channel response frame. What are the channels and it is determined that these subchannels are idle. Rather than being limited to the continuous bandwidth combination indicated by the 3bit, it is possible to break through the limitation of the positional relationship of the frequency bands, thereby indicating the overall combination of the seed channels.
  • the channel request frame further carries first channel indication information, where the first channel indication information indicates a subchannel to which the channel request frame is transmitted;
  • the use of the first channel indication information to indicate the subchannel to which the channel request frame is transmitted allows the receiving end to obtain more reliable information. Even if the request frame is not received in some subchannels, the sender can still use the information to know which channels the receiver has sent the request frame on.
  • the subchannels transmitting the channel response frame indicated by the second channel indication information determined by the processor 2380 are discontinuous.
  • the scheme in the background art can only utilize a continuous idle frequency band, and there is a case where the frequency band resources are wasted.
  • the channel 4 is wasted, so the background resource scheme resource resource usage rate is low.
  • the terminal receives the idle subchannel discontinuity corresponding to the channel response frame, that is, the transmitting end receives the channel response frame on the discrete subchannel, so that the transmitting end can accurately determine whether each subchannel is idle, and then adopt discrete manners. Data is transmitted in idle subchannels, thereby avoiding waste of channel resources, thereby increasing band resource usage.
  • the embodiment of the present invention further provides a channel decision implementation scheme before data transmission.
  • the processor 2380 is further configured to determine the idle before sending data to the first receiving end in a subchannel determined to be idle. Whether the subchannel can be fully used, if not, indicating that the channel request frame is sent to the second receiving end in the at least two subchannels, and if so, indicating that orthogonal frequency division multiplexing is used in the idle subchannel, Orthogonal frequency division multiple access or frequency division multiplexing is used to transmit data to the first receiving end.
  • the embodiment of the present invention further provides how to determine whether the currently idle subchannel can be fully used, as follows:
  • the foregoing processor 2380, configured to determine whether the idle subchannel can be fully used includes: Whether the ratio of the number of idle subchannels to the number of subchannels transmitting the channel request frame is greater than a predetermined threshold, and if yes, determining that the usage is not fully utilized, otherwise determining that the use may be sufficient; or determining whether the idle subchannel includes the primary channel, If not included, it is determined that it has not been fully utilized.
  • the embodiment of the present invention further provides that the solution of the embodiment of the present invention is applied to an overlapping Over Service Basic Service Set (OBSS) scenario to further improve the spectrum utilization efficiency of the network.
  • OBSS Over Service Basic Service Set
  • This embodiment mainly focuses on the basic service set (BSS) in the OBSS scenario, and further utilizes the idle channel of the neighbor BSS to assist in temporarily transmitting a larger amount of data, as follows:
  • the above data transmission device is located in the first basic service.
  • the at least two subchannels include subchannels of the second basic service group.
  • the embodiment of the present invention further provides another scenario for determining whether a subchannel is idle in a scenario where a primary channel exists.
  • the processor 2380 is further configured to determine, according to the channel response frame, a basic service group.
  • the busy channel is idle, and the basic service group has a busy subchannel; then it is determined whether the busy subchannel is busy due to data transmission in the basic service group, and if not, it is determined that the busy subchannel is an idle subchannel.
  • the processor 2380 is configured to determine, after receiving the channel request frame from the transmitting end, whether it is the destination receiving end of the channel request frame, if the result is determined If yes, and the subchannel corresponding to the request frame is idle, indicating that the channel response frame is sent to the transmitting end in the idle subchannel, the channel response frame carries the second channel indication information, and the second channel indication information indicates the channel response.
  • the subchannel indicating that the channel request frame is transmitted by using the second channel indication information can enable the receiving end to obtain more reliable information. Even if no response frame or request frame is received in some subchannels, the sender can still use the information to know which channels the receiving end sent the response frame or the request frame.
  • the channel response frame sent by the receiving end carries the second channel indication information, where the second channel indication information can flexibly indicate the subchannel transmitted by the channel response frame, so that the transmitting end can know that the channel response is sent. What are the subchannels of the frame, and it is determined that these subchannels are idle. Rather than being limited to the continuous bandwidth combination of the 3-bit indication, it is possible to break through the limitation of the positional relationship of the frequency bands, so that the limitation of the positional relationship of the frequency bands can be broken, thereby indicating all combinations of the various sub-channels.
  • the processor 2380 indicates that the subchannels of the transmission channel response frame are discontinuous.
  • the scheme in the background art can only utilize a continuous idle frequency band, and there is a case where the bandwidth of the frequency band is wasted.
  • the channel 4 is wasted, so the background resource scheme has a low band resource usage rate.
  • the transmitting end since the transmitting end receives the idle subchannel discontinuity corresponding to the channel response frame, that is, the transmitting end receives the channel response frame on the discrete subchannel, so that the transmitting end can accurately determine whether each subchannel is idle. Then, data is transmitted in the idle subchannel in a discrete manner, thereby avoiding waste of channel resources, thereby improving the use of the frequency band resource.
  • the embodiment of the present invention further provides a processing scheme for the receiving end to receive the request frame but is not the destination end of the request frame.
  • the processor 2380 is further configured to: if the first receiving end determines that it is not the channel request, The destination end of the frame receives the channel response frame from the destination receiving end of the channel request frame after listening to the subchannel corresponding to the channel request frame;
  • the channel response frame from the destination receiving end of the channel request frame is received within the packet control function frame interval, it is determined that the subchannel corresponding to the channel request frame is busy.
  • the embodiment of the present invention further provides an update scheme of the network allocation vector, which is specifically as follows:
  • the processor 2380 is further configured to: after receiving the channel response frame from the destination receiving end of the channel request frame, according to the received channel response frame
  • the duration indication information sets a network allocation vector of the subchannel corresponding to the channel request frame; if the channel request is not received within the packet control function frame interval
  • the channel response frame of the destination end of the frame determines that the network allocation vector of the subchannel corresponding to the channel request frame does not need to be updated.
  • the embodiment of the present invention further provides that the solution of the embodiment of the present invention is applied to the OBSS scenario to further improve the spectrum utilization efficiency of the network.
  • This embodiment mainly focuses on the BSS in the OBSS scenario, and further utilizes the idle channel of the neighbor BSS to assist in temporarily transmitting a larger amount of data, as follows: If the subchannel corresponding to the channel request frame is a subchannel of the second basic service group, The first basic service is a basic service group in which the first receiving end is located; the processor 2380 is further configured to determine whether the subchannel corresponding to the channel request frame is available before instructing the transmitter 2202 to send a channel response frame to the transmitting end. And if available, instructing the transmitter 2202 to send a channel response frame to the transmitting end.
  • the embodiment of the present invention further provides a determining scheme of whether a subchannel is available.
  • the processor 2380 is configured to determine that the subchannel corresponding to the channel request frame does not receive the second basic service group within a predetermined duration. And determining, by the signal, the subchannel corresponding to the channel request frame is available; or determining, by using the communication state of the second basic service group, whether the subchannel corresponding to the channel request frame is available within a time requested by the channel request frame.
  • the foregoing communication record includes: the foregoing communication record used by the processor 2380 to determine whether the subchannel is available: the second basic service group At least one of terminal cache information, queue information, contention window information, and fallback time information.
  • the storage medium may be a read only memory, a magnetic disk or an optical disk or the like.

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Abstract

一种数据传输方法和数据传输设备,其中方法的实现包括:发送端在至少两个子信道中向第一接收端发送信道请求帧;发送端接收到来自第一接收端的信道响应帧后,解析所述信道响应帧得到第二信道指示信息,所述第二信道指示信息指示了发送所述信道响应帧的子信道;确定发送了信道响应帧的子信道空闲;在确定为空闲的子信道中向所述第一接收端发送数据。来自接收端的信道响应帧携带有第二信道指示信息,该第二信道指示信息可以指示信道响应帧发送的子信道,这样发送端就可以获知发送了信道响应帧的子信道有哪些,并确定这些子信道空闲。而不再局限于3bit指示的连续带宽组合,因此可以突破频带的位置关系的限制,从而指示各种子信道的全部组合。

Description

一种数据传输方法和数据传输设备
技术领域
本发明涉及通信技术领域, 特別涉及一种数据传输方法和数据传输设备。 背景技术
通常提升通信系统的传输速率可以有多维的实施手段, 例如: 提升发送功 率、 增加系统带宽以及提升频谱效率等等。 根据香农容量公式, 增加系统带宽 是相对来说最容易并且效果最显著的一种手段。 因此, 大部分的通信系统都会 尽可能的增加系统带宽。 另一方面, 由于无线通信系统的频谱资源是稀缺而不 可再生的资源, 因此专用的频段都非常昂贵。 目前移动通信系统运营商如果能 获得 100MHz 的带宽就可以有效的运营一张移动通信网络, 比如长期演进 ( Long Term Evolution, LTE ) 网络。
如何将频谱资源尽可能有效的利用是无线通信系统的一个重要方向。在此 方向上,进一步的有两种渠道提升频谱资源的利用:一是通过物理层( Physical Layer, PHY ) 的手段提升频谱效率, 比如增加调制阶数, 用更好的码字提升 编码速率, 用多入多出系统( Multiple Input Multiple Output, MIMO ) 的方式 利用空间资源形成并行通路等多种方式提升频谱效率;另外一种方式则是通过 媒体接入控制层(Media Access Control, MAC ) 的调度, 信道接入等机制的 设计提升链路和网络对频谱资源的利用效率。
本申请文件主要针对后一种情况,在基于竟争接入的网络中对频谱资源利 用的有效方案。 例如: 在当前的无线保真( Wireless Fidelity, WiFi ) 系统中, 数据的发送端为了更好的获知当前哪些子信道( sub-channel )空闲和可以利用, 采用了动态请求发送 /清除发送协议( Request To Send/Clear To Send, RTS/CTS ) 的方法。 具体的说, 就是在多个连续的子信道中面发送 RTS请求该子信道的 使用; 接收端在对应的子信道中接收到 RTS后, 判断该信道空闲就回复 CTS; 发送端根据接收到的 CTS就获知具体的信道空闲状况。 为了增强该机制的可 靠性, RTS和 CTS中都要携带带宽信息, 目的是指示当前请求的带宽有多宽。 例如: 有四个连续的信道 1、 2、 3、 4, 其中信道 3繁忙其他信道空闲。 由于 该方案使用有限的比特位(3个 bit )指示带宽(Band Width, BW ), 导致接收 端和发送端均不支持离散的多信道信号, 那么, 当接收端在信道 3上判断信道 繁忙时, 虽然信道 4空闲,接收端仍然只能在信道 1和信道 2上回复 CTS。发 送端根据接收端反馈的 CTS, 在信道 1和信道 2上发送数据给接收端。
另外, 由于该方案使用 3个 bit指示 BW, 其可以指示的连续带宽也是极 其局限的, 具体如下: 结合 BW和主信道的位置,发送端只能与接收端沟通五 种模式: 主信道的 20MHz, 包含主信道的 40MHz, 包含主信道的 80MHz, 以 及包含主信道的连续 160MHz和非连续 160MHz, 且次信道(非主信道的部分 信道) 的频点必须比主信道的频点高, 否则无法指示这些可能的组合。
以上方案, 采用 3个 bit指示 BW, 基于频带的位置关系, 导致其不能对 不连续的子信道的组合进行指示。即便连续子信道采用以上方案也不能够指示 全部的连续带宽组合, 比如连续子信道组成的 60MHz带宽就无法指示。 综上, 以上方案指示子信道局限性较大, 不能指示子信道的全部组合。 发明内容
本发明实施例提供了一种数据传输方法和数据传输设备,用于指示各种子 信道的全部组合。
本发明实施例一方面提供了一种数据传输方法, 包括:
发送端在至少两个子信道中向第一接收端发送信道请求帧;
发送端接收到来自第一接收端的信道响应帧后,解析所述信道响应帧得到 第二信道指示信息,所述第二信道指示信息指示了发送所述信道响应帧的子信 道; 确定发送了信道响应帧的子信道空闲;
在确定为空闲的子信道中向所述第一接收端发送数据。
结合一方面的实现方式,在第一种可能的实现方式中, 所述第二信道指示 信息指示的发送所述信道响应帧的子信道不连续。
结合一方面的实现方式,在第二种可能的实现方式中,在所述信道请求帧 中还携带有第一信道指示信息,所述第一信道指示信息指示所述信道请求帧发 送的子信道。
结合一方面的实现方式、一方面的第一种可能的实现方式或者一方面的第 二种可能的实现方式,在第三种可能的实现方式中,在确定为空闲的子信道中 向所述第一接收端发送数据之前还包括:
确定所述空闲的子信道是否能够被充分使用, 若不能, 则在所述至少两个 子信道中向第二接收端发送信道请求帧, 若能, 则在空闲的子信道中采用正交 频分复用、 正交频分多址或者频分复用的方式向所述第一接收端发送数据。
结合一方面的第三种可能的实现方式, 在第四种可能的实现方式中, 所述 确定所述空闲的子信道是否能够被充分使用包括:
确定所述空闲的子信道数量与发送所述信道请求帧的子信道数量的比值 是否大于预定阈值, 若是, 则确定尚未充分使用, 否则确定可以充分使用; 或 者, 确定空闲的子信道中是否包含主信道, 若未包含, 则确定尚未充分使用。
结合一方面的实现方式、一方面的第一种可能的实现方式或者一方面的第 二种可能的实现方式,在第五种可能的实现方式中, 所述发送端位于第一基本 服务组, 所述至少两个子信道中包含第二基本服务组的子信道。
结合一方面的实现方式、一方面的第一种可能的实现方式或者一方面的第 二种可能的实现方式,在第六种可能的实现方式中, 若所述发送端为基本服务 组的接入点, 还包括:
确定接入点所在的基本服务组是否存在特定终端作为接收端, 若存在, 则 所述发送端在至少两个子信道中向第一接收端发送信道请求帧包括:所述接入 点在所述基本服务组的所有子信道中发送信道请求帧;
若不存在,则所述发送端在至少两个子信道中向第一接收端发送信道请求 帧包括:所述接入点在所述基本服务组中不包含主信道的空闲子信道中发送信 道请求帧。
结合一方面的第六种可能的实现方式, 在第七种可能的实现方式中, 若依 据所述信道响应帧确定所述基本服务组的主信道空闲,且所述基本服务组存在 繁忙的子信道;则确定所述繁忙的子信道是否为基本服务组内数据传输导致的 繁忙, 如果否, 确定所述繁忙的子信道为空闲子信道。
本发明实施例二方面提供了一种数据传输方法, 包括:
第一接收端接收到来自发送端的信道请求帧后,确定自身是否为所述信道 请求帧的目的接收端,若确定结果为是,并且所述请求帧对应的子信道为空闲, 则在空闲的子信道中向发送端发送信道响应帧,所述信道响应帧携带第二信道 指示信息, 所述第二信道指示信息指示信道响应帧发送的子信道;
在发送信道响应帧的子信道中接收来自所述发送端的数据。
结合二方面的实现方式,在第一种可能的实现方式中, 所述信道响应帧发 送的子信道不连续。
结合一方面的实现方式, 或者二方面的第一种可能的实现方式,在第二种 可能的实现方式中, 若第一接收端确定自身不是所述信道请求帧的目的端,还 包括:
通过监听所述信道请求帧对应的子信道,在短帧间隔时间长度之后接收来 自所述信道请求帧的目的接收端的信道响应帧;
若在分组控制功能帧间隔内,接收到来自所述信道请求帧的目的接收端的 信道响应帧, 则确定所述信道请求帧对应的子信道繁忙。
结合二方面的第二种可能的实现方式, 在第三种可能的实现方式中,在接 收到来自所述信道请求帧的目的接收端的信道响应帧之后还包括:
根据接收到的信道响应帧中的时长指示信息设置所述信道请求帧对应的 子信道的网络分配向量; 若在分组控制功能帧间隔内, 未接收来自所述信道请 求帧的目的接收端的信道响应帧,则确定所述信道请求帧对应的子信道的网络 分配向量不需要更新。
结合二方面的实现方式, 或者二方面的第三种可能的实现方式,在第四种 可能的实现方式中, 若信道请求帧对应的子信道是第二基本服务组的子信道, 第一基本服务为所述第一接收端所在的基本服务组;所述向发送端发送信道响 应帧之前还包括:
确定所述信道请求帧对应的子信道是否可用,若可用则向发送端发送信道 响应帧。
结合二方面的第四种可能的实现方式, 在第五种可能的实现方式中, 所述 确定所述信道请求帧对应的子信道是否可用包括:
确定在预定的时长内在所述信道请求帧对应的子信道未接收到所述第二 基本服务组的信号, 则确定所述信道请求帧对应的子信道可用; 或者, 通过所 述第二基本服务组的通信状态确定所述信道请求帧对应的子信道在信道请求 帧做请求的时间内是否可用。
结合二方面的第五种可能的实现方式, 在第六种可能的实现方式中, 所述 通信记录包括:
第二基本服务组的终端緩存信息、 队列信息、 竟争窗口信息、 回退时间信 息中的至少一项。
结合二方面的实现方式, 或者二方面的第三种可能的实现方式,在第七种 可能的实现方式中, 若所述第一接收端为基本服务组的接入点, 还包括:
确定接入点所在的基本服务组是否存在特定终端作为接收端, 若存在, 则 在所有子信道中均不发送信道响应帧, 若不存在, 则在所述接入点所在的基本 服务组中不包含主信道的空闲子信道中发送信道响应帧。
结合二方面的第七种可能的实现方式, 在第八种可能的实现方式中, 所述 方法, 还包括:
若主信道以及所有子信道均空闲, 则指示信道空闲可以继续回退流程; 若主信道空闲, 所述接入点所在基本服务组内部分子信道繁忙,且所述部 分子信道繁忙是由于所述基本服务组内数据传输导致,则指示信道繁忙并保持 回退流程暂停。
本发明实施例三方面提供了一种数据传输设备, 包括:
请求发送单元,用于作为发送端在至少两个子信道中向第一接收端发送信 道请求帧;
响应接收单元,用于在请求发送单元发送信道请求帧后接收来自第一接收 端的信道响应帧;
空闲确定单元,用于在响应接收单元接收到来自第一接收端的信道响应帧 后,解析所述信道响应帧得到第二信道指示信息, 所述第二信道指示信息指示 了发送所述信道响应帧的子信道; 确定发送了信道响应帧的子信道空闲;
数据发送单元,用于在空闲确定单元确定为空闲的子信道中向所述第一接 收端发送数据。
结合三方面的实现方式,在第一种可能的实现方式中,所述空闲确定单元, 用于解析的所述第二信道指示信息指示的第二信道指示信息指示的发送所述 信道响应帧的子信道不连续。 结合三方面的实现方式,在第二种可能的实现方式中,所述请求发送单元, 用于发送的所述信道请求帧中还携带有第一信道指示信息,所述第一信道指示 信息指示所述信道请求帧发送的子信道。
结合三方面的实现方式、三方面的第一种可能的实现方式或者三方面的第 二种可能的实现方式, 在第三种可能的实现方式中, 所述数据传输设备, 还包 括:
充分性确定单元,用于确定空闲确定单元确定的空闲的子信道是否能够被 充分使用;
所述请求发送单元,还用于若所述充分性确定单元确定结果为不能, 则在 所述至少两个子信道中向第二接收端发送信道请求帧;
所述数据发送单元, 用于若所述充分性确定单元确定结果为能, 则在空闲 的子信道中采用正交频分复用、正交频分多址或者频分复用的方式向所述第一 接收端发送数据。
结合三方面的第三种可能的实现方式, 在第四种可能的实现方式中, 所述 充分性确定单元,用于确定所述空闲的子信道数量与发送所述信道请求帧的子 信道数量的比值是否大于预定阈值, 若是, 则确定尚未充分使用, 否则确定可 以充分使用; 或者, 确定空闲的子信道中是否包含主信道, 若未包含, 则确定 尚未充分使用。
结合三方面的实现方式、三方面的第一种可能的实现方式或者三方面的第 二种可能的实现方式,在第五种可能的实现方式中, 所述数据传输设备位于第 一基本服务组;
所述请求发送单元,用于发送所述信道请求帧的所述至少两个子信道中包 含第二基本服务组的子信道。
结合三方面的实现方式、三方面的第一种可能的实现方式或者三方面的第 二种可能的实现方式,在第六种可能的实现方式中, 若所述数据传输设备为基 本服务组的接入点, 所述数据传输设备还包括:
第一终端确定单元,用于确定接入点所在的基本服务组是否存在特定终端 作为接收端;
所述请求发送单元, 用于若所述第一终端确定单元确定结果为存在, 则在 所述基本服务组的所有子信道中发送信道请求帧;若所述第一终端确定单元确 定结果为不存在,则在所述基本服务组中不包含主信道的空闲子信道中发送信 道请求帧。
结合三方面的第六种可能的实现方式, 在第七种可能的实现方式中, 所述 空闲确定单元,还用于若依据所述信道响应帧确定所述基本服务组的主信道空 闲,且所述基本服务组存在繁忙的子信道; 则确定所述繁忙的子信道是否为基 本服务组内数据传输导致的繁忙,如果否,确定所述繁忙的子信道为空闲子信 道。
本发明实施例四方面提供了一种数据传输设备, 包括:
请求接收单元, 用于作为第一接收端接收来自发送端的信道请求帧; 目的确定单元,用于在所述请求接收单元接收到来自发送端的信道请求帧 后, 确定自身是否为所述信道请求帧的目的接收端;
响应发送单元, 用于若所述目的确定单元确定结果为是, 并且所述请求帧 对应的子信道为空闲, 则在空闲的子信道中向发送端发送信道响应帧, 所述信 道响应帧携带第二信道指示信息,所述第二信道指示信息指示信道响应帧发送 的子信道;
数据接收单元,用于在所述相依发送单元发送信道响应帧的子信道中接收 来自所述发送端的数据。
结合四方面的实现方式,在第一种可能的实现方式中,所述响应发送单元, 用于发送所述信道响应帧的子信道不连续。
结合四方面的实现方式, 或者四方面的第一种可能的实现方式,在第二种 可能的实现方式中, 所述数据传输设备, 还包括:
监听单元,用于若所述目的确定单元确定第一接收端不是所述信道请求帧 的目的端,通过监听所述信道请求帧对应的子信道,在短帧间隔时间长度之后 接收来自所述信道请求帧的目的接收端的信道响应帧;
繁忙确定单元, 用于若所述监听单元在分组控制功能帧间隔内,接收到来 自所述信道请求帧的目的接收端的信道响应帧,则确定所述信道请求帧对应的 子信道繁忙。
结合四方面的第二种可能的实现方式, 在第三种可能的实现方式中, 所述 数据传输设备, 还包括:
向量设置单元,用于根据所述监听单元接收到的信道响应帧中的时长指示 信息设置所述信道请求帧对应的子信道的网络分配向量;若所述监听单元在分 组控制功能帧间隔内, 未接收来自所述信道请求帧的目的接收端的信道响应 帧, 则确定所述信道请求帧对应的子信道的网络分配向量不需要更新。
结合四方面的实现方式, 或者四方面的第三种可能的实现方式,在第四种 可能的实现方式中, 所述数据传输设备, 还包括:
信道确定单元,用于确定请求帧对应的子信道是否为第二基本服务组的子 信道, 第一基本服务为所述第一接收端所在的基本服务组;
可用性确定单元,用于若所述信道确定单元确定所述信道请求帧对应的子 信道是第二基本服务组的子信道,则确定所述信道请求帧对应的子信道是否可 用;
所述响应发送单元, 用于若所述可用性确定单元确定结果为可用, 则向发 送端发送信道响应帧。
结合四方面的第四种可能的实现方式, 在第五种可能的实现方式中, 所述 可用性确定单元,用于确定在预定的时长内在所述信道请求帧对应的子信道未 接收到所述第二基本服务组的信号, 则确定所述信道请求帧对应的子信道可 用; 或者,通过所述第二基本服务组的通信状态确定所述信道请求帧对应的子 信道在信道请求帧所请求的时间内是否可用。
结合四方面的第五种可能的实现方式, 在第六种可能的实现方式中, 所述 可用性确定单元, 具体用于确定子信道是否可用的通信记录包括: 第二基本服 务组的终端緩存信息、队列信息、竟争窗口信息、回退时间信息中的至少一项。
结合四方面的实现方式, 或者四方面的第三种可能的实现方式,在第七种 可能的实现方式中, 若所述数据传输设备为基本服务组的接入点, 所述数据传 输设备还包括:
第二终端确定单元,用于确定接入点所在的基本服务组是否存在特定终端 作为接收端;
所述响应发送单元, 用于若所述第二终端确定单元确定结果为存在, 则在 所有子信道中均不发送信道响应帧;若所述第二终端确定单元确定结果为不存 在,则在所述接入点所在的基本服务组中不包含主信道的空闲子信道中发送信 道响应帧。
结合四方面的第七种可能的实现方式, 在第八种可能的实现方式中, 所述 数据传输设备, 还包括:
回退流程控制单元, 用于若主信道以及所有子信道均空闲, 则指示信道空 闲可以继续回退流程; 若主信道空闲, 所述接入点所在基本服务组内部分子信 道繁忙,且所述部分子信道繁忙是由于所述基本服务组内数据传输导致, 则指 示信道繁忙并保持回退流程暂停。
从以上技术方案可以看出,来自接收端的信道响应帧携带有第二信道指示 信息, 该第二信道指示信息可以指示信道响应帧发送的子信道, 这样发送端就 可以获知发送了信道响应帧的子信道有哪些, 并确定这些子信道空闲。 而不再 局限于 3bit指示的连续带宽组合, 因此可以突破频带的位置关系的限制,从而 指示各种子信道的全部组合。 附图说明
为了更清楚地说明本发明实施例中的技术方案,下面将对实施例描述中所 需要使用的附图作筒要介绍, 显而易见地, 下面描述中的附图仅仅是本发明的 一些实施例,对于本领域的普通技术人员来讲,在不付出创造性劳动性的前提 下, 还可以根据这些附图获得其他的附图。
图 1为本发明实施例方法流程示意图;
图 2为本发明实施例方法流程示意图;
图 3为本发明实施例单用户对离散信道的空闲确认流程示意图; 图 4为本发明实施例方法流程示意图;
图 5为本发明实施例帧格式示意图;
图 6为本发明实施例多用户的空闲信道确认流程示意图;
图 7为本发明实施例方法流程示意图;
图 8为本发明实施例网络结构示意图;
图 9为本发明实施例方法流程示意图;
图 10为本发明实施例网络结构示意图; 图 11为本发明实施例存在主信道的空闲确认流程示意图;
图 12为本发明实施例方法流程示意图;
图 13为本发明实施例数据传输设备结构示意图;
图 14为本发明实施例数据传输设备结构示意图;
图 15为本发明实施例数据传输设备结构示意图;
图 16为本发明实施例数据传输设备结构示意图;
图 17为本发明实施例数据传输设备结构示意图;
图 18为本发明实施例数据传输设备结构示意图;
图 19为本发明实施例数据传输设备结构示意图;
图 20A为本发明实施例数据传输设备结构示意图;
图 20B为本发明实施例数据传输设备结构示意图;
图 21为本发明实施例数据传输设备结构示意图;
图 22为本发明实施例数据传输设备结构示意图;
图 23为本发明实施例手机结构示意图。 具体实施方式
为了使本发明的目的、技术方案和优点更加清楚, 下面将结合附图对本发 明作进一步地详细描述, 显然, 所描述的实施例仅仅是本发明一部分实施例, 而不是全部的实施例。基于本发明中的实施例, 本领域普通技术人员在没有做 出创造性劳动前提下所获得的所有其它实施例, 都属于本发明保护的范围。
本发明实施例提供了本发明实施例提供了一种数据传输方法, 如图 1 所 示, 包括:
101 : 发送端在至少两个子信道中向第一接收端发送信道请求帧; 进一步地,在信道请求帧中还携带有第一信道指示信息, 上述第一信道指 示信息指示上述信道请求帧发送的子信道。
采用第一信道指示信息指示信道请求帧发送的子信道可以令接收端获取 到更可靠的信息。 即使某些子信道中未收到信道请求帧,发送端仍然可以通过 该信息获知接收端到底在哪些信道上发送了信道请求帧。
可选地,本发明实施例还提供了将本发明实施例方案应用到交叠的基本服 务组( Overlapping Basic Service Set, OBSS )场景, 以进一步提升网络的频谱 利用效率。本实施例主要侧重于基本服务组( Basic Service Set, BSS )在 OBSS 场景下, 进一步的利用邻居 BSS 的空闲信道协助临时传输更大的数据量, 具 体如下: 上述发送端位于第一基本服务组, 上述至少两个子信道中包含第二基 本服务组的子信道。 也即: 第一基本服务组为上述发送端所在的基本服务组, 上述第二基本服务组为上述第一基本服务组以外的其他基本服务组。在后续第 三实施例中将给出更详细的说明。
可选地, 本发明实施例还提供了将本发明实施例方案应用到 OBSS场景, 以进一步提升网络的频谱利用效率。 本实施例主要侧重于 BSS在 OBSS场景 下, 进一步的利用本 BSS 的空闲信道, 具体如下: 若上述发送端为基本服务 组的接入点, 上述 101步骤在发送信道请求帧之前还包括:
确定接入点所在的基本服务组是否存在特定终端作为接收端, 若存在, 则 上述发送端在至少两个子信道中向第一接收端发送信道请求帧包括:上述接入 点在上述基本服务组的所有子信道中发送信道请求帧;
若不存在,则上述发送端在至少两个子信道中向第一接收端发送信道请求 帧包括:上述接入点在上述基本服务组中不包含主信道的空闲子信道中发送信 道请求帧。 在后续第四实施例中将给出更详细的说明。
上述特定终端是指, 不使用或者不支持图 1所示方法流程的终端。
102: 发送端接收到来自第一接收端的信道响应帧后, 解析上述信道响应 帧得到第二信道指示信息,上述第二信道指示信息指示了发送上述信道响应帧 的子信道; 确定发送了信道响应帧的子信道空闲;
在本步骤中,采用在信道响应帧中指示信道响应帧发送的子信道可以令发 送端获取到更可靠的信息。 即使某些子信道中未收到信道响应帧,发送端仍然 可以通过该信息获知接收端在这些子信道中是否发送了信道响应帧。
更具体地,上述第二信道指示信息指示的发送上述信道响应帧的子信道不 连续。 基于背景技术的描述, 背景技术中的方案仅能利用连续的空闲频带, 存 在频带资源浪费的情况。 具体地: 背景技术中的举例中, 信道 4被浪费, 因此 背景技术方案频带资源使用率较低。本实施例, 由于发送端接收到信道响应帧 对应的空闲子信道不连续, 也即是说发送端在离散的子信道收到信道响应帧, 从而发送端可以精确的确定各子信道是否空闲,然后采用离散的方式在空闲的 子信道中发送数据, 从而避免信道资源的浪费, 从而提高频带资源使用率。
进一步地, 本发明实施例还提供了在数据发送前的信道判决实现方案如 下: 在确定为空闲的子信道中向上述第一接收端发送数据之前还包括: 确定上 述空闲的子信道是否能够被充分使用, 若不能, 则在上述至少两个子信道中向 第二接收端发送信道请求帧, 若能, 在后续 103步骤发送数据过程具体为: 在 空闲的子信道中采用正交频分复用、正交频分多址或者频分复用的方式向上述 第一接收端发送数据。 在后续第二实施例中将给出更详细的说明。
在本实施例中, 如果当前空闲的子信道不能够被充分使用的情况多次出 现, 那么将会重复执行 "在上述至少两个子信道中向第二接收端发送信道请求 帧" 的步骤。
可选地,本发明实施例还提供了如何确定当前空闲的子信道是否能够被充 分使用, 具体如下: 上述确定上述空闲的子信道是否能够被充分使用包括: 确定上述空闲的子信道数量与发送上述信道请求帧的子信道数量的比值 是否大于预定阈值, 若是, 则确定尚未充分使用, 否则确定可以充分使用; 或 者, 确定空闲的子信道中是否包含主信道, 若未包含, 则确定尚未充分使用。
进一步地, 本发明实施例还提供了另一种存在主信道的场景下,确定子信 道是否空闲的方案具体如下:若依据上述信道响应帧确定基本服务组的主信道 空闲,且上述基本服务组存在繁忙的子信道; 则确定上述繁忙的子信道是否为 基本服务组内数据传输导致的繁忙,如果否,确定上述繁忙的子信道为空闲子 信道。 本方案在第四实施例后将给出更详细的说明。
103: 在确定为空闲的子信道中向上述第一接收端发送数据。
在本发明实施例中, 来自接收端的信道响应帧携带有第二信道指示信息, 该第二信道指示信息可以指示信道响应帧发送的子信道,这样发送端就可以获 知发送了信道响应帧的子信道有哪些, 并确定这些子信道空闲。 而不再局限于 3bit指示的连续带宽组合, 因此可以突破频带的位置关系的限制, 从而指示各 种子信道的全部组合。
本发明实施例还提供了另一种数据传输方法, 如图 2所示, 包括: 201 : 第一接收端接收来自发送端的信道请求帧; 上述信道请求帧可以在至少两个子信道中接收到。
202: 第一接收端接收到来自发送端的信道请求帧后, 确定自身是否为上 述信道请求帧的目的接收端, 若确定结果为是, 并且上述请求帧对应的子信道 为空闲, 则在空闲的子信道中向发送端发送信道响应帧, 上述信道响应帧携带 第二信道指示信息, 上述第二信道指示信息指示信道响应帧发送的子信道; 本步骤中,采用第二信道指示信息指示信道请求帧发送的子信道可以令接 收端获取到更可靠的信息。 即使某些子信道中未收到响应帧或者请求帧,发送 端仍然可以通过该信息获知接收端到底在哪些信道上发送了响应帧或者请求 帧。
更具体地,在本步骤中第二信道指示信息指示了发送上述信道响应帧的子 信道, 信道响应帧发送的子信道不连续。基于背景技术的描述, 背景技术中的 方案仅能利用连续的空闲频带, 存在频带资源浪费的情况。 具体地: 背景技术 中的举例中, 信道 4被浪费, 因此背景技术方案频带资源使用率较低。 本实施 例, 由于发送端接收到信道响应帧对应的空闲子信道不连续,也即是说发送端 在离散的子信道收到信道响应帧,从而发送端可以精确的确定各子信道是否空 闲, 然后采用离散的方式在空闲的子信道中发送数据,从而避免信道资源的浪 费, 从而提高频带资源使用率。
进一步地,本发明实施例还提供给了接收端在接收到请求帧但是自身又不 是请求帧的目的端的处理方案如下:若第一接收端确定自身不是上述信道请求 帧的目的端, 还包括:
通过监听上述信道请求帧对应的子信道,在短帧间隔时间长度之后接收来 自上述信道请求帧的目的接收端的信道响应帧;
若在分组控制功能帧间隔内,接收到来自上述信道请求帧的目的接收端的 信道响应帧, 则确定上述信道请求帧对应的子信道繁忙。
进一步地, 本发明实施例还提供了网络分配向量的更新方案, 具体如下: 在接收到来自上述信道请求帧的目的接收端的信道响应帧之后还包括:
根据接收到的信道响应帧中的时长指示信息设置上述信道请求帧对应的 子信道的网络分配向量; 若在分组控制功能帧间隔内, 未接收到来自上述信道 请求帧的目的接收端的信道响应帧,则确定上述信道请求帧对应的子信道的网 络分配向量不需要更新。
进一步地,本发明实施例还提供了将本发明实施例方案应用到交叠的基本 服务组( Overlapping Basic Service Set, OBSS )场景, 以进一步提升网络的频 谱利用效率。 本实施例主要侧重于基本服务组(Basic Service Set, BSS )在 OBSS 场景下, 进一步的利用邻居 BSS 的空闲信道协助临时传输更大的数据 量, 具体如下: 若信道请求帧对应的子信道是第二基本服务组的子信道, 第一 基本服务为上述第一接收端所在的基本服务组;上述向发送端发送信道响应帧 之前还包括:
确定上述信道请求帧对应的子信道是否可用,若可用则向发送端发送信道 响应帧。 在后续第三实施例中将给出更详细的说明。
可选地, 本发明实施例还提供了子信道是否可用的确定方案, 具体可以如 下: 上述确定上述信道请求帧对应的子信道是否可用包括:
确定在预定的时长内在上述信道请求帧对应的子信道未接收到上述第二 基本服务组的信号, 则确定上述信道请求帧对应的子信道可用; 或者, 通过上 述第二基本服务组的通信状态确定上述信道请求帧对应的子信道在信道请求 帧所请求的时间内是否可用。
可选地, 本发明实施例提供了通信状态的可选方案, 具体可以如下: 上述 通信记录包括: 第二基本服务组的终端緩存信息、 队列信息、 竟争窗口信息、 回退时间信息中的至少一项。 需要说明的是, 需要能够用于确定子信道是否可 用的通信记录都是可以的, 以上举例不应理解为对本发明实施例的唯一限定。
进一步地, 本发明实施例还提供了将本发明实施例方案应用到 OBSS 场 景, 以进一步提升网络的频谱利用效率。 本实施例主要侧重于 BSS在 OBSS 场景下, 进一步的利用本 BSS 的空闲信道, 具体如下: 若上述第一接收端为 基本服务组的接入点, 上述步骤 202之前还包括:
确定接入点所在的基本服务组是否存在特定终端作为接收端, 若存在, 则 在所有子信道中均不发送信道响应帧, 若不存在, 则在上述接入点所在的基本 服务组中不包含主信道的空闲子信道中发送信道响应帧。在后续第四实施例中 将给出更详细的说明。上述特定终端是指, 不使用或者不支持图 1所示方法流 程的终端。 203: 在发送信道响应帧的子信道中接收来自上述发送端的数据。 在本发明实施例中, 接收端发送的信道响应帧携带有第二信道指示信息, 该第二信道指示信息可以灵活的指示信道响应帧发送的子信道,这样发送端就 可以获知发送了信道响应帧的子信道有哪些, 并确定这些子信道空闲。 而不再 局限于 3bit指示的连续带宽组合, 因此可以突破频带的位置关系的限制, 因此 可以突破频带的位置关系的限制, 从而指示各种子信道的全部组合。
进一步地,本发明实施例还给出了回退流程的控制方法,以上方法还包括: 若主信道以及所有子信道均空闲, 则指示信道空闲可以继续回退流程; 若 主信道空闲, 上述接入点所在基本服务组内部分子信道繁忙,且上述部分子信 道繁忙是由于上述基本服务组内数据传输导致,则指示信道繁忙并保持回退流 程暂停。 在后续第四实施例中将给出更详细的说明。
后续将给出四个实施例进行举例说明,用来对以上实施例的四种可能的应 用场景进行举例说明, 需要说明的是, 本发明实施例的应用场景很多, 在不违 背本发明实施例方案思想的情况下都是可以的,以下四个应用场景的举例不应 理解为对本发明实施例应用场景的穷举,以下四个应用场景的举例也不应理解 为对本发明实施例应用场景的唯一性限定。
第一实施例:
本实施例针对单用户的场景,对背景技术中的方案作出改进,使其能够有 效的支持离散信道。如图 3所示。请参阅图 3所示的单用户对离散信道的空闲 确认示意图, 图 3中包含 4个信道( Channel ), 分別为信道 1〜信道 4, 在 4个 信道中, 发送的请求(Request )是指发送的信道请求帧, 响应(Response )或 者无响应 (No Response )指信道响应帧或者没有信道响应帧, 数据 (Data ) 是指有数据发送, 图 2的流程可以筒单描述为:
步骤一: 发送端在多个子信道中发送信道请求帧 (Request )给接收端, 上述信道请求帧优选为相同的格式, 并携带信道指示信息,指示本次的信道请 求帧都在哪些信道中发送。
本步骤中,信道请求帧使用相同格式可以方便接收端在任意一个子信道中 接收到数据就可以正确解调数据。
步骤二: 接收端在各子信道接收到信道请求帧后, 首先判断自己是否是该 信道请求帧的目的接收端。如果上述接收端为目的接收端, 则根据自身在上述 子信道中的空闲情况判断并发送信道响应帧: 如果信道空闲, 则发送信道响应 帧; 如果信道繁忙, 则不发送信道响应帧。 在各空闲子信道的信道响应帧优选 使用相同格式, 并携带信道指示信息, 指示本次的信道响应帧都在哪些信道中 发送。
采用在信道响应帧中指示信道响应帧发送的子信道可以令接收端获取到 更可靠的信息。 即使某些子信道中未收到响应帧,发送端仍然可以通过该信息 获知接收端到底在哪些信道上发送了响应帧。
步骤三: 发送端在发送了信道请求帧的子信道中接收信道响应帧, 并在接 收到信道响应帧的子信道中发送数据给接收端。 可以理解的是: 由于在信道 3 中没有收到信道响应帧, 故而后续发送数据过程中, 信道 3中没有发送数据。
本实施例中, 对于步骤二, 有如下进一步的步骤, 用来解决接收端不是目 的接收端情况下如何处理的问题, 具体可以如下:
如果上述接收端不是目的接收端, 则接收端进一步在短帧间隔 (Short Inter-frame Space, SIFS ) 时间长度内在上述信道请求帧上的子信道中接收信 道响应帧(该信道响应帧是目的接收端发送的。 由于非目的接收端在继续监听 信道, 将就会收到该信道响应帧)。如果接收端在分组控制功能帧间隔(Packet Control Function Inter-frame Space, PIFS ) ( PIFS>SIFS ) 内, 非目的接收端在 上述子信道中接收到信道响应帧, 则判断该子信道繁忙, 并根据信道响应帧中 的时长指示信息设置该子信道的 NAV (网络分配向量, 用于指示当前信道被 其他客户端 (Station, STA ) 占用的时间长度); 如果在 PIFS内非目的接收端 在上述子信道中未接收到信道响应帧,则判断该子信道中的 NAV不需要更新。
以上所有步骤可以用图 4所示的流程图表示,其中 STA1为发送端, STA2 为目的接收端, STA3为非目的接收端。
为了支持以上步骤,在图 3和图 4所示的信道请求帧和信道响应帧中需要 携带信道指示信息。 一种可能的帧格式如表 1所示。 这里, 信道请求帧和信道 响应帧可以采用相同的格式。 该帧格式中, 帧控制 ( Frame Control )主要是指 示本帧的类型和特征, 持续时间 (Duration )用于指示本帧所占用或者是发送 端期望占用的时间长度, RA ( Receiver Address )表示目的接收端的地址, TA ( transmitter Address )表示发送端的地址 , Number of Channels表示本†贞一共 在多少个子信道中发送, Channel Info n表示第 n个信道的信息, 具体可以包 括信道号或者信道的中心频点, 帧校验序列 (Frame Check Sequence, FCS ) 用于接收端校验该帧是否接收正确。其中, Number of Channels和 Channel Info 1〜!!携带信道指示信息,可以指示当前请求 /响应的信道指示信息。这里的信道 都以基本的信道单元为单位。 一个典型的例子是: 信道单元为 20MHz。
表 1 一种信道请求帧和信道响应帧的格式
Figure imgf000019_0001
如图 4所示, 为多个空闲子信道的确认以及 NAV设置的流程图, 包含如 下步骤:
401 : 发送 STA在空闲信道上发送 Request并携带信道指示信息; 由于接 收 STA1和接收 STA2均在该空闲信道上监听, 故而接收 STA1和接收 STA2 均会收到该 Request。
402: 接收 STA1 (目的接收端 )接收 Request;接收 STA2 (非目的接收端 ) 接收 Request, 并在 Request指示的信道进一步等待 Response;
403: 接收 STAl检测 Request指示的信道是否空闲, 如果否, 保持沉默, 如果是, 进入 404;
404: 接收 STA1确定在空闲的子信道中回复 Response给发送 STA; 接收 STA1 发送 Response 并携带空闲信道指示信息; 由于接收 STA2 也监听了 Response发送的信道, 因此 Response也会被接收 STA2所接收到。
405: 发送 STA接收 Response, 并根据 Response所在的信道和携带的信 息确定空闲信道, 然后在空闲信道中发送数据;
406:接收 STA2在 Request指示的信道接收 Response,如果接收到则设置 对应 Response的子信道的 NAV, 否则不更新子信道的 NAV。
进一步地,如表 2所示,为了与现有帧格式兼容,可以通过在帧控制( Frame Control ) 中增加一个指示信息位, 用于指示信道数 ( Number of Channels )和 Channel Info 1〜!!(信道信息)两部分信道指示域的存在。 该信息位除了在帧控 制域, 也可以在 Duration/RA/TA等位置存在。 本发明实施例不对其位置作出 限制。此外,如果接收端可以有效分离并获得当前的指示的信道个数, Number of Channels指示域也可以省略。 为了进一步提升效率, 减小帧格式的开销, 在 接收端接收到信道请求帧指示时, 其发送的信道响应帧还可以采用位图 ( bitmap ) 以筒化其信道指示信息。
表 2筒化的信道响应帧
Figure imgf000020_0001
在表 2中, 信道位图 (Channel bitmap ) 中, 对发送端发送的信道请求帧 指示的子信道用 bitmap 的方式作出指示。 比如, 如果信道请求帧共请求了 4 个信道: 1、 2、 3、 6, 而接收端在信道 1、 3、 6空闲, 则 bitmap可以指示为 10100100或者是 10110000。 第一种指示方式与信道的物理位置对应, 而第二 种指示方式则与信道的逻辑位置对应:对信道请求帧指示的信道按顺序编号后 指示, 即将信道 1、 2、 ,3、 6按顺序编号为 1、 2、 3、 4, 并映射为 bitmap的 前 4位; 接收端通过对该 bitmap的前四位设置为 1或者 0分別指示信道可用 或者信道不可用。 值得注意的是, bitmap可以用 1代表信道可用, 也可以用 0 代表信道可用。 本发明实施例对此不做约束。 同样的, 为了与现有格式重用, 信道响应帧的 Channel bitmap为可选项, 并通过位于 Channel bitmap之前的某 个信息位指示其存在或者不存在。
除了专门设计的信道请求帧和信道响应帧外,如果发送端直接在其空闲的 子信道中发送数据并在数据 (data ) 中指示信道指示信息, 接收端可以在 ACK/BA ( Acknowledgement/ Block ACK, 确认 /块确认) 中携带响应的信道指 示信息。 一种可行的格式如图 5所示, 在 BA中放入信道指示信息。 虽然图 5 指示的格式为信道号或者信道中心频率, 但也可以携带筒化的 bitmap信息, 本发明不作约束。
在图 5中, 包含有帧控制 ( Frame Control )、 持续时间 /身份标识(持续时 间 / Identity, ID )、接收端地址( receiver address, RA )、发送端地址( transmitter address, TA )、 BA控制( BA Control )、 BA信息( BA Information ) 以及帧校验 序歹 'J ( Frame Check Sequence, FCS ), 其中 BA Information中携带有: 块确开始 认序列控制( Block Ack Starting Sequence Control )以及块确认位图( Block Ack bitmap ), Block Ack bitmap中携带有信道信息 ( Channel Info ) l~n, 各字段上 显示了其所占字节数。
第二实施例:
本实施例在实施例一的基础上将该模式扩展到支持多用户的传输。 图 6 是正交频分多址 /频分复用 ( Orthogonal Frequency Division Multiple Access/Frequency Division Multiplexing Access, OFDMA/FDMA ) 的示例。 发 送方式还可以是正交频分复用 ( Orthogonal Frequency Division Multiple , OFDM )等其他方式, 多用户的发送方式, 还可能有 4艮多, 本发明实施例对此 不予限定。
如图 6所示的多用户的空闲信道确认示意图,本发明在流程上与第一实施 例类似, 本实施例的扩展在于发送端可以通过多次发送的方式(每次发送的目 的接收端只有一个), 发送信道请求帧给多个目的接收端。 具体流程如下: 步骤一: 发送端在多个子信道中发送信道请求帧 (Request )给接收端, 上述信道请求帧为相同的格式, 并携带信道指示信息,指示信道请求帧在哪些 信道中发送。
步骤二: 接收端在各子信道接收到信道请求帧后, 首先判断自己是否是该 信道请求帧的目的接收端。如果上述接收端为目的接收端, 则根据自身在上述 子信道中的空闲情况判断并发送信道响应帧: 如果信道空闲, 则发送信道响应 帧; 如果信道繁忙, 则不发送信道响应帧。 在空闲子信道发送的信道响应帧可 以为相同格式, 并携带信道指示信息, 指示信道响应帧在哪些信道中发送。
步骤三: 发送端在发送了信道请求帧的子信道中接收信道响应帧, 判断当 前其空闲信道是否可以充分使用,如果尚未充分使用, 则更换一个接收端并回 到步骤一; 如果可以充分使用, 则在接收到信道响应帧的子信道中用 OFDMA/FDMA的方式发送数据给此次被请求过的接收端。
以上步骤三中, 信道是否可以充分使用的判断准则可以是: 1、 当前接收到信道响应帧的子信道数(可能是多个用户的响应子信道, 对其求并集)占发送端已发送信道请求帧的子信道数的比值大于某个阈值。令 前者为 Nrsp, 后者为 Nreq, 则其比值为 Nrsp/Nreq, 又令阈值为 σ, 本条件为 Nrsp/Nreq>o。
2、 当前接收到信道响应帧的子信道中已经包含主信道(主信道, primary channel, 用于传输数据帧, 控制帧和管理帧)。 如果未包含主信道, 则判断为 未充分使用。
以上 1和 1两种准则是或的关系。
以上步骤三中, 除了判断信道是否充分使用这种方式外,如果发送端自身 准备采用多用户的传输方式(例如 OFDMA/FDMA ) , 也可以利用本实施例的 步骤多次请求和响应, 对各接收端的子信道空闲状况具备充分的了解。
以上步骤三中, 发送端利用 OFDMA/FDMA发送数据给多个目的接收端 时,其选择那些目的接收端以及为每个目的接收端分配的带宽都可以由发送端 自行决定。 具体的实施方法灵活多变, 本发明实施例对此不予限定。
本实施例可以进一步用流程图表示如图 Ί 所示, 图 Ί 所示为发送端
OFDMA/FDMA发送的信道扩展流程示意图, 包括如下步骤:
701 :发送 STA在空闲信道上发送 Request给目的 STA并携带信道指示信 息;
702: 目的 STA接收 Response, 并根据 Response所在的信道和携带的信 息确定空闲信道;
703: 发送 STA依据 Response确认当前空闲子信道, 并确定当前空闲子 信道是否利用充分, 如果是, 进入 704, 否则进入 705;
704: 发送 STA在确认的空闲信道上发送数据给上述目的 STA;
705: 发送 STA切换新的目的 STA, 进入 701。
第三实施例:
在本实施例中,将第一实施例和第二实施例的方案应用到交叠的基本服务 组(Overlapping BSS )场景, 以进一步提升网络的频谱利用效率。 本实施例主 要侧重于基本服务组(Basic Service Set, BSS )在 OBSS场景下, 进一步的利 用邻居 BSS的空闲信道协助临时传输更大的数据量。 本实施例的一个流程是利用非本 BSS信道的子信道(off channel )来帮助 传输数据。 作为一个筒单的场景举例, 可以假设有两个 BSS, 如图 8所示为: 在两个 BSS交叠时 Off Channel的利用示意图。 对应接入点 1 ( Access Point 1 , API )的 BSS1运作的信道为 5和 6, 对应 AP2的 BSS2运作的信道为 1、 2和 3。如果在 BSS1中,位于 BSS1与 BSS2交叠区域的 STA1未与 API发送信号, STA1已经占用了信道 5,则 AP2与 BSS2中的 STA2可以利用 BSS1的信道在 这段时间里发起数据传输, 以支持临时性的大数据量传输。
本实施例在流程上基于第一实施例和第二实施例,在此基石出上, API需要 新的流程以确保 BSS1可以或者不能利用非本 BSS ( BSS2 )的信道。 对于上行 的情况, 即 STA2为发送端, AP2为接收端, 保持步骤三不变。 对于步骤一和 步骤二具体如下:
步骤一: STA2 在包含 off channel 的多个子信道中发送信道请求帧 ( Request )给接收端, 在多个子信道中发送的上述信道请求帧为相同的格式, 并携带信道指示信息, 指示信道请求帧在哪些信道中发送。
步骤二: AP2在各子信道接收到信道请求帧后, 首先判断 AP2是否是该 信道请求帧的目的接收端。 如果上述 AP2为目的接收端, 则根据 AP2在上述 子信道中的空闲情况以及是否可用 (是否可用的判断仅适用于 off channel, 对 于 AP2所在的 BSS的信道, 即 BSS2的信道不适用)来判断并发送信道响应 帧: 如果信道空闲, 则发送信道响应帧;如果信道繁忙, 则不发送信道响应帧。 在各空闲子信道的发送的信道响应帧可以为相同格式, 并携带信道指示信息, 指示信道响应帧在哪些信道中发送。
步骤三: STA2在发送了信道请求帧的子信道中接收信道响应帧, 判断当 前其空闲信道是否可以充分使用, 如果尚未充分使用, 则更换一个 AP并回到 步骤一; 如果可以充分使用, 则在接收到信道响应帧的子信道中用 OFDMA/FDMA的方式发送数据给本次被请求过的接收端。 AP判断当前其空 闲信道是否可以充分使用,如果尚未充分使用, 则在其他未收到信道请求帧的 空闲信道中也发送信道响应帧, 这部分信道响应帧的目的地址为除了 STA2的 其他可能的 STA。 本步骤为可选步骤。
步骤四: STA2在接收到信道响应帧的子信道中用 OFDMA/FDMA的方式 发送数据给本次被请求过的接收端。 其他 STA如果在其他子信道接收到目的 地址为该 STA的信道响应帧, 则在其他子信道与 STA2用 OFDMA/FDMA的 方式同时传输数据。
对于步骤二中 off channel子信道的空闲情况, AP需要增加如图 9所示的 流程以进一步确认 off channel的可用情况。 其中, "固定时长内在 off channel 上接收到其他 BSS的信号" 是 AP处的历史记录, AP可以根据该记录判断在 STA的请求帧内所指示的时间里是否会接收到来自其他 BSS的信号。 该判断 标准仅为一种可行的判断标准, 实际中可以有多种判断的标准, 比如通过相邻 的 AP之间交互信息判断。这种情况下,ΑΡ搜集本 BSS内 STA的緩存(Buffer ) /队列 (Queue )信息 (甚至是竟争窗口和回退时间等信息), 并将这些消息与 相邻的 AP交互。 AP基于邻居 AP的上述信息, 可以判断在 STA的请求帧内 所指示的时间里, 是否会在 off channel上接收到来自其他 BSS的信号。 另一 种替代的可行方法是, AP直接搜集相邻 BSS 内的 STA的相关信息 (比如緩 存(Buffer ) /队列 (Queue )信息, 或者是竟争窗口和回退时间等信息), 并根 据信息作出判断。 请参阅图 9为: AP在 off channel接收到请求时的判断流程 包括如下步骤:
901 : AP在 off channel上接收到信道请求帧, 即: 接收到信道请求帧的 channel包含 off channel;
902: AP确定 Off channel是否空闲, 如果是空闲的, 进入 903 , 否则不响 应上述信道请求帧;
903: AP确定在固定时长内在 off channel上是否接收到其他 BSS的信号, 如果是, 则确定 off channel不可用, 并响应上述信道请求帧; 如果否, 则确定 off channel可用, 并响应上述信道请求帧。
本实施例也同样可以应用到下行的 off channel传输。其流程与上面的流程 基本一致, 但要注意的是, 判断的主体仍然是 AP, STA不对来自相邻 BSS的 信号负责:
步骤一: AP判断 off channel是否可用;
步骤二: 如果 off channel可用, AP在包含 off channel的多个子信道中发 送信道请求帧(Request )给 STA, 发送的所有信道请求帧可以为相同的格式, 并携带信道指示信息, 指示本次的信道请求帧都在哪些信道中发送。 步骤三: STA在各子信道接收到信道请求帧后, 首先判断自己是否是该信 道请求帧的目的接收端。 如果上述 STA为目的接收端, 则根据 STA在上述子 信道中的空闲情况来判断并发送信道响应帧: 如果信道空闲, 则发送信道响应 帧; 如果信道繁忙, 则不发送信道响应帧。 在各空闲子信道的发送的所有信道 响应帧可以为相同格式, 并携带信道指示信息,指示信道响应帧在哪些信道中 发送。
步骤四: AP在发送了信道请求帧的子信道中接收信道响应帧, 判断当前 其空闲信道是否可以充分使用, 如果尚未充分使用, 则更换一个 STA并回到 步骤一; 如果可以充分使用, 则在接收到信道响应帧的子信道中用 OFDMA/FDMA的方式发送数据给本次被请求过的 STA。
第四实施例:
在本实施例中,将第一实施例和第二实施例的方案应用到 OBSS场景, 以 进一步提升网络的频谱利用效率。 本实施例主要侧重于 BSS在 OBSS场景下, 进一步的利用本 BSS的空闲信道。
如图 10所示, 为两个 BSS交叠时多余信道的利用的网络结构示意图, 本 实施例中的图 10所示, 依然以两个 AP的场景举例: BSS1的运作信道是 1和 2, BSS2的运作信道是 1、 2和 3。 如果在 BSS1中, 位于 BSS1与 BSS2交叠 区域的 STA1与 API在信道 1和 2上发送信号或者 API在信道 1和 2上发送 信号, 则 AP2无法在信道 1和 2上与 BSS2中的 STA2通信, 但此时 AP2还 可以利用信道 3给 BSS2中的 STA2通信, 以增加 BSS2中的数据传输时间, 提升网络的吞吐量。
本实施例在信道请求和响应的流程(步骤一、二和三)上与第一实施例(单 用户)或者第二实施例(多用户)相同。 为了实现本实施例的目标, 如果当前 主信道( primary channel )不可用,但其他子信道可用, 则 AP需要对当前 BSS 中是否存在旧版本的 STA ( legacy STA )作出进一步的判断, 分为以下两种情 况:
一、 AP2是接收端时, 如果当前 BSS2中存在旧版本的 STA, 则在所有的 子信道中都不响应发送端的信道请求帧; 如果当前 BSS 中不存在旧版本的 STA, 则仅在空闲的子信道(不包含 primary channel ) 中响应发送端的信道请 求帧。 对于图 10所示的场景, 如图 11所示为: STA发送请求, AP响应的流 程示意图, 包含三个信道, 信道 1、 信道 2和信道 3 , 其中信道 1为主信道, 那么 STA2发送信道请求帧( RTS2 ), 那么 AP2在信道 1和信道 2中将不发送 信道响应帧 (无信道响应帧), 在信道 3上发送信道响应帧。
二、 AP2是发送端时, 如果当前 BSS2中存在旧版本的 STA, 则在所有的 子信道中都发送信道请求帧; 如果当前 BSS2中不存在旧版本的 STA, 则仅在 空闲的子信道 (不包含 primary channel ) 中发送信道请求帧。
进一步的,对于新一代的 STA,其判断信道是否空闲的流程如图 12所示, 该流程其主要的目的是避免其他 STA发现 AP在主信道上空闲时发起全信道的 传输, 导致 AP与 STA正在进行的次信道传输失败。 具体包括如下步骤:
1201 : STA检测到主信道空闲, 进入下一步 1202;
1202: 判断本 BSS的所有子信道是否空闲, 如果空闲, 进入 1203 , 否则 进入 1204;
1203: 如果本 BSS的所有子信道空闲, 则指示本 STA的信道为空闲, 可 以继续回退(back off) 流程, 并发送信号;
1204: 如果本 BSS 的部分子信道繁忙, 则进一步判断其繁忙的原因是由 本 BSS内的数据传输导致还是其他 BSS的数据传输导致, 如果是其他的 BSS 的数据传输导致, 则进入步骤 1203; 如果是本 BSS的数据传输导致, 则进入 1205;
1205:指示本 STA的信道为繁忙,保持 back off流程暂停,不能发送信号。 与以上步骤对应的 back off流程,是根据其指示的 STA的信道为空闲或者 繁忙为依据的。 BSS所有子信道中如果检测到有本 BSS的信号, 就认为当前 的信道是繁忙的。 这里与第一实施例中多个子信道的 NAV是不同的, 每个子 信道的 NAV只是指示该子信道为空闲或者繁忙; 而决定 STA的 back off流程 的信道空闲或者繁忙则只有一个。 进一步的, 图 12的流程中 STA需要判断子 信道的繁忙是本 BSS的信号导致还是其他 BSS的信号导致, 因此 STA需要保 存 NAV对应的发送端地址, 上述发送端地址可以是 MAC地址或者是关联地 址 ( Associate Identifier, AID )。 另外一种可行的 back off流程则是 STA或者 AP仅在主信道上工作, 即当 主信道空闲时, 回退时间 (back off timer ) 才开始减小。 在这种情况下, 为了 令本实施例方案 4艮好的工作, STA可以在 back off timer没有减 d、到 0时, 如 果检测到次信道空闲, 就可以在次信道上发起传输。 上述 "次信道" 上的传输 时间根据主信道的 NAV值(比如, 已知相邻 BSS在主信道的传输时长)决定。 为了避免多个 STA在相同的次信道上发起传输, 每个 STA都需要有第二 back off, 上述第二 back off仅在原 back off (第一 back off )暂停且次信道空闲时, 才开始工作。 具体的工作流程与第一 back off一致。
更进一步的, 本发明实施例的方案可以应用到工作在全频段的 BSS (即没 有 BSS信道, 各 BSS都占用所有可用的子信道; 一旦发现子信道空闲, 就可 以发起传输)。 在这种情况下, 各 BSS必须有一个主信道, 相邻 BSS的主信道 尽量在频段上错开(不交叠)。
本发明实施例还提供了一种数据传输设备, 如图 13所示, 包括: 请求发送单元 1301 , 用于作为发送端在至少两个子信道中向第一接收端 发送信道请求帧;
响应接收单元 1302, 用于在请求发送单元 1301发送信道请求帧后接收来 自第一接收端的信道响应帧;
空闲确定单元 1303 , 用于在响应接收单元 1302接收到来自第一接收端的 信道响应帧后,解析上述信道响应帧得到第二信道指示信息, 上述第二信道指 示信息指示了发送上述信道响应帧的子信道;确定发送了信道响应帧的子信道 空闲;
数据发送单元 1304, 用于在空闲确定单元 1303确定为空闲的子信道中向 上述第一接收端发送数据。
在本发明实施例中, 来自接收端的信道响应帧携带有第二信道指示信息, 该第二信道指示信息可以指示信道响应帧发送的子信道,这样发送端就可以获 知发送了信道响应帧的子信道有哪些, 并确定这些子信道空闲。 而不再局限于 3bit指示的连续带宽组合, 因此可以突破频带的位置关系的限制, 从而指示各 种子信道的全部组合。
更具体地, 上述空闲确定单元 1303 , 用于解析的上述第二信道指示信息 指示的第二信道指示信息指示的发送上述信道响应帧的子信道不连续。背景技 术中的方案仅能利用连续的空闲频带, 存在频带资源浪费的情况。 具体地: 背 景技术中的举例中, 信道 4被浪费, 因此背景技术方案频带资源使用率较低。 本实施例, 由于发送端接收到信道响应帧对应的空闲子信道不连续,也即是说 发送端在离散的子信道收到信道响应帧,从而发送端可以精确的确定各子信道 是否空闲, 然后采用离散的方式在空闲的子信道中发送数据,从而避免信道资 源的浪费, 从而提高频带资源使用率。
可选地, 上述请求发送单元 1301 , 用于发送的上述信道请求帧中还携带 有第一信道指示信息, 上述第一信道指示信息指示信道请求帧发送的子信道。
在实施例中,采用在信道响应帧中指示信道响应帧发送的子信道可以令接 收端获取到更可靠的信息。 即使某些子信道中未收到响应帧,发送端仍然可以 通过该信息获知接收端在这些子信道中是否发送了响应帧。
进一步地, 本发明实施例还提供了在数据发送前的信道判决实现方案如 下: 如图 14所示, 上述数据传输设备, 还包括:
充分性确定单元 1401 , 用于确定空闲确定单元 1303确定的空闲的子信道 是否能够被充分使用;
上述请求发送单元 1301 , 还用于若上述充分性确定单元 1401确定结果为 不能, 则在至少两个子信道中向第二接收端发送信道请求帧;
上述数据发送单元 1304,用于若上述充分性确定单元 1401确定结果为能, 则在空闲的子信道中采用正交频分复用、正交频分多址或者频分复用的方式向 上述第一接收端发送数据。
可选地,本发明实施例还提供了如何确定当前空闲的子信道是否能够被充 分使用, 具体如下: 上述充分性确定单元 1401 , 用于确定上述空闲的子信道 数量与发送上述信道请求帧的子信道数量的比值是否大于预定阈值, 若是, 则 确定尚未充分使用, 否则确定可以充分使用; 或者, 确定空闲的子信道中是否 包含主信道, 若未包含, 则确定尚未充分使用。
可选地, 上述数据传输设备位于第一基本服务组; 上述请求发送单元 1301 ,用于发送上述信道请求帧的上述至少两个子信道中包含第二基本服务组 的子信道。 可选地, 本发明实施例还提供了将本发明实施例方案应用到 OBSS场景, 以进一步提升网络的频谱利用效率。 本实施例主要侧重于 BSS在 OBSS场景 下, 进一步的利用本 BSS 的空闲信道, 具体如下: 若上述数据传输设备为基 本服务组的接入点, 如图 15所示, 上述数据传输设备还包括:
第一终端确定单元 1501 , 用于确定接入点所在的基本服务组是否存在特 定终端作为接收端;
上述请求发送单元 1301 , 用于若上述第一终端确定单元 1501确定结果为 存在, 则在上述接入点所在的基本服务组的所有子信道中发送信道请求帧; 若 上述第一终端确定单元 1501确定结果为不存在, 则在上述接入点所在的基本 服务组中不包含主信道的空闲子信道中发送信道请求帧。
进一步地, 本发明实施例还提供了另一种存在主信道的场景下,确定子信 道是否空闲的方案具体如下: 上述空闲确定单元 1303 , 还用于若依据上述信 道响应帧确定上述基本服务组的主信道空闲,且上述基本服务组存在繁忙的子 信道; 则确定上述繁忙的子信道是否为基本服务组内数据传输导致的繁忙, 如 果否, 确定上述繁忙的子信道为空闲。
本实施例中, 在确定子信道空闲以后, 可以执行回退流程, 否则需要暂停 回退流程。
本发明实施例还提供了另一种数据传输设备, 如图 16所示, 包括: 请求接收单元 1601 , 用于作为第一接收端接收来自发送端的信道请求帧; 目的确定单元 1602, 用于在上述请求接收单元 1601接收到来自发送端的 信道请求帧后, 确定自身是否为上述信道请求帧的目的接收端;
响应发送单元 1603 , 用于若上述目的确定单元 1602确定结果为是, 并且 上述请求帧对应的子信道为空闲,则在空闲的子信道中向发送端发送信道响应 帧, 上述信道响应帧携带第二信道指示信息,上述第二信道指示信息指示信道 响应帧发送的子信道;
数据接收单元 1604, 用于在上述相依发送单元发送信道响应帧的子信道 中接收来自上述发送端的数据。
在本发明实施例中, 接收端发送的信道响应帧携带有第二信道指示信息, 该第二信道指示信息可以灵活的指示信道响应帧发送的子信道,这样发送端就 可以获知发送了信道响应帧的子信道有哪些, 并确定这些子信道空闲。 而不再 局限于 3bit指示的连续带宽组合, 因此可以突破频带的位置关系的限制, 因此 可以突破频带的位置关系的限制, 从而指示各种子信道的全部组合。
更具体地, 上述响应发送单元 1603 , 用于发送上述信道响应帧的子信道 不连续。 基于背景技术的描述, 背景技术中的方案仅能利用连续的空闲频带, 存在频带资源浪费的情况。 具体地: 背景技术中的举例中, 信道 4被浪费, 因 此背景技术方案频带资源使用率较低。 本实施例, 由于发送端接收到信道响应 帧对应的空闲子信道不连续, 也即是说发送端在离散的子信道收到信道响应 帧,从而发送端可以精确的确定各子信道是否空闲, 然后采用离散的方式在空 闲的子信道中发送数据,从而避免信道资源的浪费,从而提高频带资源使用率。
进一步地,本发明实施例还提供给了上述数据传输设备在接收到请求帧但 是自身又不是请求帧的目的端的处理方案如下: 如图 17所示, 上述数据传输 设备, 还包括:
监听单元 1701 , 用于若上述目的确定单元 1602确定第一接收端不是上述 信道请求帧的目的端,通过监听上述信道请求帧对应的子信道,在短帧间隔时 间长度之后接收来自上述信道请求帧的目的接收端的信道响应帧;
繁忙确定单元 1702,用于若上述监听单元 1701在分组控制功能帧间隔内, 接收到来自上述信道请求帧的目的接收端的信道响应帧,则确定上述信道请求 帧对应的子信道繁忙。
进一步地, 本发明实施例还提供了网络分配向量的更新方案, 具体如下: 如图 18所示, 上述数据传输设备, 还包括:
向量设置单元 1801 , 用于根据上述监听单元 1701接收到的信道响应帧中 的时长指示信息设置上述信道请求帧对应的子信道的网络分配向量;若上述监 听单元 1701在分组控制功能帧间隔内, 未接收到来自上述信道请求帧的目的 接收端的信道响应帧,则确定上述信道请求帧对应的子信道的网络分配向量不 需要更新。
进一步地,本发明实施例还提供了将本发明实施例方案应用到交叠的基本 服务组( Overlapping Basic Service Set, OBSS )场景, 以进一步提升网络的频 谱利用效率。 本实施例主要侧重于基本服务组(Basic Service Set, BSS )在 OBSS 场景下, 进一步的利用邻居 BSS 的空闲信道协助临时传输更大的数据 量, 具体如下: 如图 19所示, 上述数据传输设备, 还包括:
信道确定单元 1901 , 用于确定请求帧对应的子信道是否为第二基本服务 组的子信道, 第一基本服务为上述第一接收端所在的基本服务组;
可用性确定单元 1902, 用于若上述信道确定单元 1901确定上述信道请求 帧对应的子信道是第二基本服务组的子信道,则确定上述信道请求帧对应的子 信道是否可用;
上述响应发送单元 1603 , 用于若上述可用性确定单元 1902确定结果为可 用, 则向发送端发送信道响应帧。
可选地, 本发明实施例还提供了子信道是否可用的确定方案, 具体可以如 下: 上述可用性确定单元 1902, 用于确定在预定的时长内在上述信道请求帧 对应的子信道未接收到上述第二基本服务组的信号,则确定上述信道请求帧对 应的子信道可用; 或者,通过上述第二基本服务组的通信状态确定上述信道请 求帧对应的子信道在信道请求帧所请求的时间内是否可用。
可选地, 本发明实施例提供了通信状态的可选方案, 具体可以如下: 上述 可用性确定单元 1902, 具体用于确定子信道是否可用的通信记录包括: 第二 基本服务组的终端緩存信息、 队列信息、 竟争窗口信息、 回退时间信息中的至 少 J¾。
进一步地, 本发明实施例还提供了将本发明实施例方案应用到 OBSS 场 景, 以进一步提升网络的频谱利用效率。 本实施例主要侧重于 BSS在 OBSS 场景下, 进一步的利用本 BSS 的空闲信道, 具体如下: 若上述数据传输设备 为基本服务组的接入点, 如图 20A所示, 上述数据传输设备还包括:
第二终端确定单元 2001 , 用于确定接入点所在的基本服务组是否存在特 定终端作为接收端;
上述响应发送单元 1603 , 用于若上述第二终端确定单元 2001确定结果为 存在,则在所有子信道中均不发送信道响应帧;若上述第二终端确定单元 2001 确定结果为不存在,则在上述接入点所在的基本服务组中不包含主信道的空闲 子信道中发送信道响应帧。
上述特定终端是指, 不使用或者不支持图 1所示方法流程的终端。 进一步地, 如图 20B所示, 本发明实施例还提供了回退流程的控制方案 如下: 上述数据传输设备, 还包括:
回退流程控制单元 2002, 用于若主信道以及所有子信道均空闲, 则指示 信道空闲可以继续回退流程; 若主信道空闲, 上述接入点所在基本服务组内部 分子信道繁忙, 且上述部分子信道繁忙是由于上述基本服务组内数据传输导 致, 则指示信道繁忙并保持回退流程暂停。
本发明实施例还提供了另一种数据传输装置,该数据传输装置作为数据的 发送端使用,如图 21所示,包括:接收器 2101、发射器 2102以及处理器 2103; 其中, 发射器 2102 , 用于在至少两个子信道中向第一接收端发送信道请 求帧; 在处理器 2103确定为空闲的子信道中向上述第一接收端发送数据; 接收器 2101 , 用于接收来自第一接收端的信道响应帧;
处理器 2103 ,用于在接收器 2101接收到来自第一接收端的信道响应帧后, 解析上述信道响应帧得到第二信道指示信息,上述第二信道指示信息指示了发 送上述信道响应帧的子信道; 确定发送了信道响应帧的子信道空闲。
在本发明实施例中, 来自接收端的信道响应帧携带有第二信道指示信息, 该第二信道指示信息可以指示信道响应帧发送的子信道,这样发送端就可以获 知发送了信道响应帧的子信道有哪些, 并确定这些子信道空闲。 而不再局限于 3bit指示的连续带宽组合, 因此可以突破频带的位置关系的限制, 从而指示各 种子信道的全部组合。
进一步地,在上述信道请求帧中还携带有第一信道指示信息, 上述第一信 道指示信息指示信道请求帧发送的子信道;
采用第一信道指示信息指示信道请求帧发送的子信道可以令接收端获取 到更可靠的信息。 即使某些子信道中未收到请求帧,发送端仍然可以通过该信 息获知接收端到底在哪些信道上发送了请求帧。
更具体地, 上述处理器 2103确定的第二信道指示信息指示的发送上述信 道响应帧的子信道不连续。基于背景技术的描述, 背景技术中的方案仅能利用 连续的空闲频带, 存在频带资源浪费的情况。 具体地: 背景技术中的举例中, 信道 4被浪费, 因此背景技术方案频带资源使用率较低。 本实施例, 由于发送 端接收到信道响应帧对应的空闲子信道不连续,也即是说发送端在离散的子信 道收到信道响应帧,从而发送端可以精确的确定各子信道是否空闲, 然后采用 离散的方式在空闲的子信道中发送数据,从而避免信道资源的浪费,从而提高 频带资源使用率。
进一步地, 本发明实施例还提供了在数据发送前的信道判决实现方案如 下: 上述处理器 2103 , 还用于在确定为空闲的子信道中向上述第一接收端发 送数据之前, 确定上述空闲的子信道是否能够被充分使用, 若不能, 则指示上 述发射器 2102在上述至少两个子信道中向第二接收端发送信道请求帧,若能, 则指示上述发射器 2102在空闲的子信道中采用正交频分复用、 正交频分多址 或者频分复用的方式向上述第一接收端发送数据。
可选地,本发明实施例还提供了如何确定当前空闲的子信道是否能够被充 分使用, 具体如下: 上述处理器 2103 , 用于确定上述空闲的子信道是否能够 被充分使用包括:用于确定上述空闲的子信道数量与发送上述信道请求帧的子 信道数量的比值是否大于预定阈值, 若是, 则确定尚未充分使用, 否则确定可 以充分使用; 或者, 确定空闲的子信道中是否包含主信道, 若未包含, 则确定 尚未充分使用。
可选地,本发明实施例还提供了将本发明实施例方案应用到交叠的基本服 务组( Overlapping Basic Service Set, OBSS )场景, 以进一步提升网络的频谱 利用效率。本实施例主要侧重于基本服务组( Basic Service Set, BSS )在 OBSS 场景下, 进一步的利用邻居 BSS 的空闲信道协助临时传输更大的数据量, 具 体如下: 上述数据传输装置位于第一基本服务组, 上述发射器 2102发射的子 信道中 , 上述至少两个子信道中包含第二基本服务组的子信道。
可选地, 本发明实施例还提供了将本发明实施例方案应用到 OBSS场景, 以进一步提升网络的频谱利用效率。 本实施例主要侧重于 BSS在 OBSS场景 下, 进一步的利用本 BSS 的空闲信道, 具体如下: 若上述发送端为基本服务 组的接入点, 上述处理器 2103 , 还用于确定接入点所在的基本服务组是否存 在特定终端作为接收端, 若存在, 则指示上述发射器 2102在上述基本服务组 的所有子信道中发送信道请求帧;
若不存在, 则指示上述发射器 2102在上述基本服务组中不包含主信道的 空闲子信道中发送信道请求帧。 上述特定终端是指, 不使用或者不支持图 1所示方法流程的终端。
可选地, 本发明实施例还提供了另一种存在主信道的场景下,确定子信道 是否空闲的方案具体如下: 上述处理器 2103 , 还用于若依据上述信道响应帧 确定基本服务组的主信道空闲,且上述基本服务组存在繁忙的子信道; 则确定 繁忙的子信道是否为基本服务组内数据传输导致的繁忙,如果否,确定上述繁 忙的子信道为空闲子信道。
本发明实施例还提供给了另一种数据传输设备, 如图 22所示, 该数据传 输设备作为第一接收端使用,包括:接收器 2201、发射器 2202以及处理器 2203; 其中, 接收器 2201 , 用于接收来自发送端的信道请求帧; 在发射器 2202 发送信道响应帧的子信道中接收来自上述发送端的数据;
处理器 2203 , 用于在接收到来自发送端的信道请求帧后, 确定自身是否 为上述信道请求帧的目的接收端, 若确定结果为是, 并且上述请求帧对应的子 信道为空闲,则指示发射器 2202在空闲的子信道中向发送端发送信道响应帧, 上述信道响应帧携带第二信道指示信息,上述第二信道指示信息指示信道响应 帧发送的子信道;
发射器 2202, 用于向发送端发送信道响应帧。
采用第二信道指示信息指示信道请求帧发送的子信道可以令接收端获取 到更可靠的信息。 即使某些子信道中未收到响应帧或者请求帧,发送端仍然可 以通过该信息获知接收端到底在哪些信道上发送了响应帧或者请求帧。
在本发明实施例中, 接收端发送的信道响应帧携带有第二信道指示信息, 该第二信道指示信息可以灵活的指示信道响应帧发送的子信道,这样发送端就 可以获知发送了信道响应帧的子信道有哪些, 并确定这些子信道空闲。 而不再 局限于 3bit指示的连续带宽组合, 因此可以突破频带的位置关系的限制, 因此 可以突破频带的位置关系的限制, 从而指示各种子信道的全部组合。
更具体地, 处理器 2203 , 指示发射器 2202发送信道响应帧的子信道不连 续。 基于背景技术的描述, 背景技术中的方案仅能利用连续的空闲频带, 存在 频带资源浪费的情况。 具体地: 背景技术中的举例中, 信道 4被浪费, 因此背 景技术方案频带资源使用率较低。本实施例, 由于发送端接收到信道响应帧对 应的空闲子信道不连续,也即是说发送端在离散的子信道收到信道响应帧,从 而发送端可以精确的确定各子信道是否空闲,然后采用离散的方式在空闲的子 信道中发送数据, 从而避免信道资源的浪费, 从而提高频带资源使用率。
进一步地,本发明实施例还提供给了接收端在接收到请求帧但是自身又不 是请求帧的目的端的处理方案如下: 上述处理器 2203 , 还用于若第一接收端 确定自身不是上述信道请求帧的目的端,通过监听上述信道请求帧对应的子信 道, 在短帧间隔时间长度之后通过上述接收器 2201接收来自上述信道请求帧 的目的接收端的信道响应帧;
若在分组控制功能帧间隔内, 上述接收器 2201接收到来自上述信道请求 帧的目的接收端的信道响应帧, 则确定上述信道请求帧对应的子信道繁忙。
本发明实施例还提供了网络分配向量的更新方案, 具体如下: 上述处理器
2203 , 还用于在上述接收器 2201接收到来自上述信道请求帧的目的接收端的 信道响应帧之后,根据接收到的信道响应帧中的时长指示信息设置上述信道请 求帧对应的子信道的网络分配向量; 若上述接收器 2201在分组控制功能帧间 隔内, 未接收到来自上述信道请求帧的目的接收端的信道响应帧, 则确定上述 信道请求帧对应的子信道的网络分配向量不需要更新。
进一步地,本发明实施例还提供了将本发明实施例方案应用到交叠的基本 服务组( Overlapping Basic Service Set, OBSS )场景, 以进一步提升网络的频 谱利用效率。 本实施例主要侧重于基本服务组(Basic Service Set, BSS )在 OBSS场景下, 进一步的利用邻居 BSS 的空闲信道协助临时传输更大的数据 量, 具体如下: 若信道请求帧对应的子信道是第二基本服务组的子信道, 第一 基本服务为上述第一接收端所在的基本服务组; 上述处理器 2203 , 在指示上 述发射器 2202向发送端发送信道响应帧之前, 还用于确定上述信道请求帧对 应的子信道是否可用, 若可用则指示上述发射器 2202向发送端发送信道响应 帧。
本发明实施例还提供了子信道是否可用的确定方案, 具体可以如下: 上述 处理器 2203 , 用于确定在预定的时长内在上述信道请求帧对应的子信道未接 收到上述第二基本服务组的信号, 则确定上述信道请求帧对应的子信道可用; 或者,通过上述第二基本服务组的通信状态确定上述信道请求帧对应的子信道 在信道请求帧所请求的时间内是否可用。 可选地, 本发明实施例提供了通信状态的可选方案, 具体可以如下: 上述 通信记录包括: 上述处理器 2203用于确定子信道是否可用所使用的上述通信 记录包括: 第二基本服务组的终端緩存信息、 队列信息、 竟争窗口信息、 回退 时间信息中的至少一项。
可选地, 本发明实施例还提供了将本发明实施例方案应用到 OBSS场景, 以进一步提升网络的频谱利用效率。 本实施例主要侧重于 BSS在 OBSS场景 下, 进一步的利用本 BSS 的空闲信道, 具体如下: 若上述数据传输设备为基 本服务组的接入点, 上述处理器 2203 , 还用于确定接入点所在的基本服务组 是否存在特定终端作为接收端, 若存在, 则在所有子信道中均不发送信道响应 帧, 若不存在, 则在上述接入点所在的基本服务组中不包含主信道的空闲子信 道中发送信道响应帧。上述特定终端是指, 不使用或者不支持图 1所示方法流 程的终端。
本发明实施例还提供了另一种数据传输设备, 如图 23所示, 为了便于说 明, 仅示出了与本发明实施例相关的部分, 具体技术细节未揭示的, 请参照本 发明实施例方法部分。 该数据传输设备可以是终端, 终端可以为包括手机、 平 板电脑、 个人数字助理(Personal Digital Assistant, PDA ), 销售终端( Point of Sales, POS )、 车载电脑等任意终端设备, 以终端为手机为例:
图 23 示出的是与本发明实施例提供的终端相关的手机的部分结构的框 图。 参考图 23 , 手机包括: 射频( Radio Frequency, RF ) 电路 2310、 存储器 2320、 输入单元 2330、 显示单元 2340、 传感器 2350、 音频电路 2360、 无线保 真( wireless fidelity, WiFi )模块 2370、 处理器 2380、 以及电源 2390等部件。 本领域技术人员可以理解, 图 23中示出的手机结构并不构成对手机的限定, 可以包括比图示更多或更少的部件,或者组合某些部件,或者不同的部件布置。
下面结合图 23对手机的各个构成部件进行具体的介绍:
RF电路 2310可用于收发信息或通话过程中,信号的接收和发送,特別地, 将基站的下行信息接收后, 给处理器 2380处理; 另外, 将设计上行的数据发 送给基站。 通常, RF电路 2310包括但不限于天线、 至少一个放大器、 收发信 机、 耦合器、 低噪声放大器(Low Noise Amplifier, LNA )、 双工器等。 此外, RF电路 2310还可以通过无线通信与网络和其他设备通信。上述无线通信可以 使用任一通信标准或协议,包括但不限于全球移动通讯系统 ( Global System of Mobile communication , GSM )、 通用分组无线月良务 ( General Packet Radio Service, GPRS )、 码分多址( Code Division Multiple Access, CDMA )、 宽带码 分多址( Wideband Code Division Multiple Access, WCDMA )、长期演进 ( Long Term Evolution, LTE )、电子邮件、短消息服务( Short Messaging Service, SMS ) 等。
存储器 2320可用于存储软件程序以及模块,处理器 2380通过运行存储在 存储器 2320的软件程序以及模块, 从而执行手机的各种功能应用以及数据处 理。 存储器 2320可主要包括存储程序区和存储数据区, 其中, 存储程序区可 存储操作系统、 至少一个功能所需的应用程序(比如声音播放功能、 图像播放 功能等)等;存储数据区可存储根据手机的使用所创建的数据(比如音频数据、 电话本等)等。 此外, 存储器 2320可以包括高速随机存取存储器, 还可以包 括非易失性存储器, 例如至少一个磁盘存储器件、 闪存器件、 或其他易失性固 态存储器件。
输入单元 2330可用于接收输入的数字或字符信息, 以及产生与手机的用 户设置以及功能控制有关的键信号输入。 具体地, 输入单元 2330可包括触控 面板 2331以及其他输入设备 2332。 触控面板 2331 , 也称为触摸屏, 可收集用 户在其上或附近的触摸操作 (比如用户使用手指、触笔等任何适合的物体或附 件在触控面板 2331上或在触控面板 2331附近的操作), 并根据预先设定的程 式驱动相应的连接装置。 可选的, 触控面板 2331可包括触摸检测装置和触摸 控制器两个部分。 其中, 触摸检测装置检测用户的触摸方位, 并检测触摸操作 带来的信号,将信号传送给触摸控制器; 触摸控制器从触摸检测装置上接收触 摸信息, 并将它转换成触点坐标, 再送给处理器 2380, 并能接收处理器 2380 发来的命令并加以执行。 此外, 可以采用电阻式、 电容式、 红外线以及表面声 波等多种类型实现触控面板 2331。 除了触控面板 2331 ,输入单元 2330还可以 包括其他输入设备 2332。 具体地, 其他输入设备 2332可以包括但不限于物理 键盘、 功能键(比如音量控制按键、 开关按键等)、 轨迹球、 鼠标、 操作杆等 中的一种或多种。
显示单元 2340可用于显示由用户输入的信息或提供给用户的信息以及手 机的各种菜单。 显示单元 2340可包括显示面板 2341 , 可选的, 可以采用液晶 显示器( Liquid Crystal Display, LCD )、有机发光二极管( Organic Light-Emitting Diode, OLED )等形式来配置显示面板 2341。 进一步的, 触控面板 2331可覆 盖显示面板 2341 , 当触控面板 2331检测到在其上或附近的触摸操作后, 传送 给处理器 2380以确定触摸事件的类型,随后处理器 2380根据触摸事件的类型 在显示面板 2341上提供相应的视觉输出。 虽然在图 23中, 触控面板 2331与 显示面板 2341是作为两个独立的部件来实现手机的输入和输入功能, 但是在 某些实施例中,可以将触控面板 2331与显示面板 2341集成而实现手机的输入 和输出功能。
手机还可包括至少一种传感器 2350, 比如光传感器、 运动传感器以及其 他传感器。 具体地, 光传感器可包括环境光传感器及接近传感器, 其中, 环境 光传感器可根据环境光线的明暗来调节显示面板 2341的亮度, 接近传感器可 在手机移动到耳边时,关闭显示面板 2341和 /或背光。作为运动传感器的一种, 加速计传感器可检测各个方向上(一般为三轴 )加速度的大小, 静止时可检测 出重力的大小及方向, 可用于识別手机姿态的应用 (比如横竖屏切换、 相关游 戏、 磁力计姿态校准)、 振动识別相关功能(比如计步器、 敲击)等; 至于手 机还可配置的陀螺仪、气压计、湿度计、温度计、红外线传感器等其他传感器, 在此不再赘述。
音频电路 2360、扬声器 2361 ,传声器 2362可提供用户与手机之间的音频 接口。 音频电路 2360可将接收到的音频数据转换后的电信号, 传输到扬声器 2361 , 由扬声器 2361转换为声音信号输出; 另一方面, 传声器 2362将收集的 声音信号转换为电信号, 由音频电路 2360接收后转换为音频数据, 再将音频 数据输出处理器 2380处理后, 经 RF电路 2310以发送给比如另一手机, 或者 将音频数据输出至存储器 2320以便进一步处理。
WiFi属于短距离无线传输技术, 手机通过 WiFi模块 2370可以帮助用户 收发电子邮件、浏览网页和访问流式媒体等, 它为用户提供了无线的宽带互联 网访问。 虽然图 23示出了 WiFi模块 2370, 但是可以理解的是, 其并不属于 手机的必须构成, 完全可以根据需要在不改变发明的本质的范围内而省略。
处理器 2380是手机的控制中心, 利用各种接口和线路连接整个手机的各 个部分, 通过运行或执行存储在存储器 2320内的软件程序和 /或模块, 以及调 用存储在存储器 2320内的数据, 执行手机的各种功能和处理数据, 从而对手 机进行整体监控。 可选的, 处理器 2380可包括一个或多个处理单元; 优选的, 处理器 2380可集成应用处理器和调制解调处理器, 其中, 应用处理器主要处 理操作系统、 用户界面和应用程序等, 调制解调处理器主要处理无线通信。 可 以理解的是, 上述调制解调处理器也可以不集成到处理器 2380中。
手机还包括给各个部件供电的电源 2390 (比如电池 ), 优选的, 电源可以 通过电源管理系统与处理器 2380逻辑相连, 从而通过电源管理系统实现管理 充电、 放电、 以及功耗管理等功能。
尽管未示出, 手机还可以包括摄像头、 蓝牙模块等, 在此不再赘述。
在本发明实施例中, 该终端所包括的处理器 2380还具有以下功能: 若手机作为发送端使用, 那么处理器 2380, 用于接收来自第一接收端的 信道响应帧; 用于在接收到来自第一接收端的信道响应帧后,解析上述信道响 应帧得到第二信道指示信息,上述第二信道指示信息指示了发送上述信道响应 帧的子信道; 确定发送了信道响应帧的子信道空闲。
在本发明实施例中, 来自接收端的信道响应帧携带有第二信道指示信息, 该第二信道指示信息可以指示信道响应帧发送的子信道,这样发送端就可以获 知发送了信道响应帧的子信道有哪些, 并确定这些子信道空闲。 而不再局限于 3bit指示的连续带宽组合, 因此可以突破频带的位置关系的限制, 从而指示各 种子信道的全部组合。
进一步地,在上述信道请求帧中还携带有第一信道指示信息, 上述第一信 道指示信息指示信道请求帧发送的子信道;
采用第一信道指示信息指示信道请求帧发送的子信道可以令接收端获取 到更可靠的信息。 即使某些子信道中未收到请求帧,发送端仍然可以通过该信 息获知接收端到底在哪些信道上发送了请求帧。
更具体地, 上述处理器 2380确定的第二信道指示信息指示的发送上述信 道响应帧的子信道不连续。基于背景技术的描述, 背景技术中的方案仅能利用 连续的空闲频带, 存在频带资源浪费的情况。 具体地: 背景技术中的举例中, 信道 4被浪费, 因此背景技术方案频带资源使用率较低。 本实施例, 由于发送 端接收到信道响应帧对应的空闲子信道不连续,也即是说发送端在离散的子信 道收到信道响应帧,从而发送端可以精确的确定各子信道是否空闲, 然后采用 离散的方式在空闲的子信道中发送数据,从而避免信道资源的浪费,从而提高 频带资源使用率。
进一步地, 本发明实施例还提供了在数据发送前的信道判决实现方案如 下: 上述处理器 2380, 还用于在确定为空闲的子信道中向上述第一接收端发 送数据之前, 确定上述空闲的子信道是否能够被充分使用, 若不能, 则指示在 上述至少两个子信道中向第二接收端发送信道请求帧, 若能, 则指示在空闲的 子信道中采用正交频分复用、正交频分多址或者频分复用的方式向上述第一接 收端发送数据。
可选地,本发明实施例还提供了如何确定当前空闲的子信道是否能够被充 分使用, 具体如下: 上述处理器 2380, 用于确定上述空闲的子信道是否能够 被充分使用包括:用于确定上述空闲的子信道数量与发送上述信道请求帧的子 信道数量的比值是否大于预定阈值, 若是, 则确定尚未充分使用, 否则确定可 以充分使用; 或者, 确定空闲的子信道中是否包含主信道, 若未包含, 则确定 尚未充分使用。
可选地,本发明实施例还提供了将本发明实施例方案应用到交叠的基本服 务组( Overlapping Basic Service Set, OBSS )场景, 以进一步提升网络的频谱 利用效率。本实施例主要侧重于基本服务组( Basic Service Set, BSS )在 OBSS 场景下, 进一步的利用邻居 BSS 的空闲信道协助临时传输更大的数据量, 具 体如下: 上述数据传输装置位于第一基本服务组, 上述发射的子信道中, 上述 至少两个子信道中包含第二基本服务组的子信道。
可选地, 本发明实施例还提供了另一种存在主信道的场景下,确定子信道 是否空闲的方案具体如下: 上述处理器 2380, 还用于若依据上述信道响应帧 确定基本服务组的主信道空闲,且上述基本服务组存在繁忙的子信道; 则确定 繁忙的子信道是否为基本服务组内数据传输导致的繁忙,如果否,确定上述繁 忙的子信道为空闲子信道。
若手机作为第一接收端使用, 则处理器 2380, 用于在接收到来自发送端 的信道请求帧后,确定自身是否为上述信道请求帧的目的接收端, 若确定结果 为是, 并且上述请求帧对应的子信道为空闲, 则指示在空闲的子信道中向发送 端发送信道响应帧, 上述信道响应帧携带第二信道指示信息, 上述第二信道指 示信息指示信道响应帧发送的子信道。
采用第二信道指示信息指示信道请求帧发送的子信道可以令接收端获取 到更可靠的信息。 即使某些子信道中未收到响应帧或者请求帧,发送端仍然可 以通过该信息获知接收端到底在哪些信道上发送了响应帧或者请求帧。
在本发明实施例中, 接收端发送的信道响应帧携带有第二信道指示信息, 该第二信道指示信息可以灵活的指示信道响应帧发送的子信道,这样发送端就 可以获知发送了信道响应帧的子信道有哪些, 并确定这些子信道空闲。 而不再 局限于 3bit指示的连续带宽组合, 因此可以突破频带的位置关系的限制, 因此 可以突破频带的位置关系的限制, 从而指示各种子信道的全部组合。
更具体地, 处理器 2380, 指示发送信道响应帧的子信道不连续。 基于背 景技术的描述, 背景技术中的方案仅能利用连续的空闲频带,存在频带资源浪 费的情况。 具体地: 背景技术中的举例中, 信道 4被浪费, 因此背景技术方案 频带资源使用率较低。本实施例, 由于发送端接收到信道响应帧对应的空闲子 信道不连续,也即是说发送端在离散的子信道收到信道响应帧,从而发送端可 以精确的确定各子信道是否空闲,然后采用离散的方式在空闲的子信道中发送 数据, 从而避免信道资源的浪费, 从而提高频带资源使用率。
进一步地,本发明实施例还提供给了接收端在接收到请求帧但是自身又不 是请求帧的目的端的处理方案如下: 上述处理器 2380, 还用于若第一接收端 确定自身不是上述信道请求帧的目的端,通过监听上述信道请求帧对应的子信 道,在短帧间隔时间长度之后接收来自上述信道请求帧的目的接收端的信道响 应帧;
若在分组控制功能帧间隔内,接收到来自上述信道请求帧的目的接收端的 信道响应帧, 则确定上述信道请求帧对应的子信道繁忙。
本发明实施例还提供了网络分配向量的更新方案, 具体如下: 上述处理器 2380, 还用于在接收到来自上述信道请求帧的目的接收端的信道响应帧之后, 根据接收到的信道响应帧中的时长指示信息设置上述信道请求帧对应的子信 道的网络分配向量; 若在分组控制功能帧间隔内, 未接收到来自上述信道请求 帧的目的接收端的信道响应帧,则确定上述信道请求帧对应的子信道的网络分 配向量不需要更新。
进一步地, 本发明实施例还提供了将本发明实施例方案应用到 OBSS 场 景, 以进一步提升网络的频谱利用效率。 本实施例主要侧重于 BSS在 OBSS 场景下, 进一步的利用邻居 BSS 的空闲信道协助临时传输更大的数据量, 具 体如下: 若信道请求帧对应的子信道是第二基本服务组的子信道, 第一基本服 务为上述第一接收端所在的基本服务组; 上述处理器 2380, 在指示上述发射 器 2202向发送端发送信道响应帧之前, 还用于确定上述信道请求帧对应的子 信道是否可用, 若可用则指示上述发射器 2202向发送端发送信道响应帧。
本发明实施例还提供了子信道是否可用的确定方案, 具体可以如下: 上述 处理器 2380, 用于确定在预定的时长内在上述信道请求帧对应的子信道未接 收到上述第二基本服务组的信号, 则确定上述信道请求帧对应的子信道可用; 或者,通过上述第二基本服务组的通信状态确定上述信道请求帧对应的子信道 在信道请求帧所请求的时间内是否可用。
可选地, 本发明实施例提供了通信状态的可选方案, 具体可以如下: 上述 通信记录包括: 上述处理器 2380用于确定子信道是否可用所使用的上述通信 记录包括: 第二基本服务组的终端緩存信息、 队列信息、 竟争窗口信息、 回退 时间信息中的至少一项。
值得注意的是,上述用户设备和无线接入设备只是按照功能逻辑进行划分 的, 但并不局限于上述的划分, 只要能够实现相应的功能即可; 另外, 各功能 单元的具体名称也只是为了便于相互区分, 并不用于限制本发明的保护范围。
另外,本领域普通技术人员可以理解实现上述各方法实施例中的全部或部 分步骤是可以通过程序来指令相关的硬件完成,相应的程序可以存储于一种计 算机可读存储介质中,上述提到的存储介质可以是只读存储器,磁盘或光盘等。
以上仅为本发明较佳的具体实施方式, 但本发明的保护范围并不局限于 此,任何熟悉本技术领域的技术人员在本发明实施例揭露的技术范围内, 可轻 易想到的变化或替换, 都应涵盖在本发明的保护范围之内。 因此, 本发明的保 护范围应该以权利要求的保护范围为准。

Claims

权 利 要 求
1、 一种数据传输方法, 其特征在于, 包括:
发送端在至少两个子信道中向第一接收端发送信道请求帧;
发送端接收到来自第一接收端的信道响应帧后,解析所述信道响应帧得到 第二信道指示信息,所述第二信道指示信息指示了发送所述信道响应帧的子信 道; 确定发送了信道响应帧的子信道空闲;
在确定为空闲的子信道中向所述第一接收端发送数据。
2、 根据权利要求 1所述方法, 其特征在于, 所述第二信道指示信息指示 的发送所述信道响应帧的子信道不连续。
3、 根据权利要求 1所述方法, 其特征在于,
在所述信道请求帧中还携带有第一信道指示信息,所述第一信道指示信息 指示所述信道请求帧发送的子信道。
4、 根据权利要求 1至 3任意一项所述方法, 其特征在于, 在确定为空闲 的子信道中向所述第一接收端发送数据之前还包括:
确定所述空闲的子信道是否能够被充分使用, 若不能, 则在所述至少两个 子信道中向第二接收端发送信道请求帧, 若能, 则在空闲的子信道中采用正交 频分复用、 正交频分多址或者频分复用的方式向所述第一接收端发送数据。
5、 根据权利要求 4所述方法, 其特征在于, 所述确定所述空闲的子信道 是否能够被充分使用包括:
确定所述空闲的子信道数量与发送所述信道请求帧的子信道数量的比值 是否大于预定阈值, 若是, 则确定尚未充分使用, 否则确定可以充分使用; 或 者, 确定空闲的子信道中是否包含主信道, 若未包含, 则确定尚未充分使用。
6、 根据权利要求 1至 3任意一项所述方法, 其特征在于,
所述发送端位于第一基本服务组,所述至少两个子信道中包含第二基本服 务组的子信道。
7、 根据权利要求 1至 3任意一项所述方法, 其特征在于, 若所述发送端 为基本服务组的接入点, 还包括:
确定接入点所在的基本服务组是否存在特定终端作为接收端, 若存在, 则 所述发送端在至少两个子信道中向第一接收端发送信道请求帧包括:所述接入 点在所述基本服务组的所有子信道中发送信道请求帧;
若不存在,则所述发送端在至少两个子信道中向第一接收端发送信道请求 帧包括:所述接入点在所述基本服务组中不包含主信道的空闲子信道中发送信 道请求帧。
8、 根据权利要求 7所述方法, 其特征在于, 若依据所述信道响应帧确定 所述基本服务组的主信道空闲,且所述基本服务组存在繁忙的子信道; 则确定 所述繁忙的子信道是否为基本服务组内数据传输导致的繁忙,如果否,确定所 述繁忙的子信道为空闲子信道。
9、 一种数据传输方法, 其特征在于, 包括:
第一接收端接收到来自发送端的信道请求帧后,确定自身是否为所述信道 请求帧的目的接收端,若确定结果为是,并且所述请求帧对应的子信道为空闲, 则在空闲的子信道中向发送端发送信道响应帧,所述信道响应帧携带第二信道 指示信息, 所述第二信道指示信息指示信道响应帧发送的子信道;
在发送信道响应帧的子信道中接收来自所述发送端的数据。
10、 根据权利要求 9所述方法, 其特征在于, 所述信道响应帧发送的子信 道不连续。
11、 根据权利要求 9或 10所述方法, 其特征在于, 若第一接收端确定自 身不是所述信道请求帧的目的端, 还包括:
通过监听所述信道请求帧对应的子信道,在短帧间隔时间长度之后接收来 自所述信道请求帧的目的接收端的信道响应帧;
若在分组控制功能帧间隔内,接收到来自所述信道请求帧的目的接收端的 信道响应帧, 则确定所述信道请求帧对应的子信道繁忙。
12、 根据权利要求 11所述方法, 其特征在于, 在接收到来自所述信道请 求帧的目的接收端的信道响应帧之后还包括:
根据接收到的信道响应帧中的时长指示信息设置所述信道请求帧对应的 子信道的网络分配向量; 若在分组控制功能帧间隔内, 未接收来自所述信道请 求帧的目的接收端的信道响应帧,则确定所述信道请求帧对应的子信道的网络 分配向量不需要更新。
13、 根据权利要求 9或 10所述方法, 其特征在于, 若信道请求帧对应的 子信道是第二基本服务组的子信道,第一基本服务为所述第一接收端所在的基 本服务组; 所述向发送端发送信道响应帧之前还包括:
确定所述信道请求帧对应的子信道是否可用,若可用则向发送端发送信道 响应帧。
14、 根据权利要求 13所述方法, 其特征在于, 所述确定所述信道请求帧 对应的子信道是否可用包括:
确定在预定的时长内在所述信道请求帧对应的子信道未接收到所述第二 基本服务组的信号, 则确定所述信道请求帧对应的子信道可用; 或者, 通过所 述第二基本服务组的通信状态确定所述信道请求帧对应的子信道在信道请求 帧做请求的时间内是否可用。
15、 根据权利要求 14所述方法, 其特征在于, 所述通信记录包括: 第二基本服务组的终端緩存信息、 队列信息、 竟争窗口信息、 回退时间信 息中的至少一项。
16、 根据权利要求 9或 10所述方法, 其特征在于, 若所述第一接收端为 基本服务组的接入点, 还包括:
确定接入点所在的基本服务组是否存在特定终端作为接收端, 若存在, 则 在所有子信道中均不发送信道响应帧, 若不存在, 则在所述接入点所在的基本 服务组中不包含主信道的空闲子信道中发送信道响应帧。
17、 根据权利要求 16所述方法, 其特征在于, 还包括:
若主信道以及所有子信道均空闲, 则指示信道空闲可以继续回退流程; 若主信道空闲, 所述接入点所在基本服务组内部分子信道繁忙,且所述部 分子信道繁忙是由于所述基本服务组内数据传输导致,则指示信道繁忙并保持 回退流程暂停。
18、 一种数据传输设备, 其特征在于, 包括:
请求发送单元,用于作为发送端在至少两个子信道中向第一接收端发送信 道请求帧;
响应接收单元,用于在请求发送单元发送信道请求帧后接收来自第一接收 端的信道响应帧;
空闲确定单元,用于在响应接收单元接收到来自第一接收端的信道响应帧 后,解析所述信道响应帧得到第二信道指示信息, 所述第二信道指示信息指示 了发送所述信道响应帧的子信道; 确定发送了信道响应帧的子信道空闲;
数据发送单元,用于在空闲确定单元确定为空闲的子信道中向所述第一接 收端发送数据。
19、 根据权利要求 18所述数据传输设备, 其特征在于,
所述空闲确定单元,用于解析的所述第二信道指示信息指示的第二信道指 示信息指示的发送所述信道响应帧的子信道不连续。
20、 根据权利要求 18所述数据传输设备, 其特征在于,
所述请求发送单元,用于发送的所述信道请求帧中还携带有第一信道指示 信息, 所述第一信道指示信息指示所述信道请求帧发送的子信道。
21、 根据权利要求 18至 20任意一项所述数据传输设备, 其特征在于, 还 包括:
充分性确定单元,用于确定空闲确定单元确定的空闲的子信道是否能够被 充分使用;
所述请求发送单元,还用于若所述充分性确定单元确定结果为不能, 则在 所述至少两个子信道中向第二接收端发送信道请求帧;
所述数据发送单元, 用于若所述充分性确定单元确定结果为能, 则在空闲 的子信道中采用正交频分复用、正交频分多址或者频分复用的方式向所述第一 接收端发送数据。
22、 根据权利要求 11所述数据传输设备, 其特征在于,
所述充分性确定单元,用于确定所述空闲的子信道数量与发送所述信道请 求帧的子信道数量的比值是否大于预定阈值, 若是, 则确定尚未充分使用, 否 则确定可以充分使用;或者,确定空闲的子信道中是否包含主信道,若未包含, 则确定尚未充分使用。
23、 根据权利要求 18至 20任意一项所述数据传输设备, 其特征在于, 所 述数据传输设备位于第一基本服务组;
所述请求发送单元,用于发送所述信道请求帧的所述至少两个子信道中包 含第二基本服务组的子信道。
24、 根据权利要求 18至 20任意一项所述数据传输设备, 其特征在于, 若 所述数据传输设备为基本服务组的接入点, 所述数据传输设备还包括: 第一终端确定单元,用于确定接入点所在的基本服务组是否存在特定终端 作为接收端;
所述请求发送单元, 用于若所述第一终端确定单元确定结果为存在, 则在 所述基本服务组的所有子信道中发送信道请求帧;若所述第一终端确定单元确 定结果为不存在,则在所述基本服务组中不包含主信道的空闲子信道中发送信 道请求帧。
25、 根据权利要求 24所述数据传输设备, 其特征在于,
所述空闲确定单元,还用于若依据所述信道响应帧确定所述基本服务组的 主信道空闲,且所述基本服务组存在繁忙的子信道; 则确定所述繁忙的子信道 是否为基本服务组内数据传输导致的繁忙,如果否,确定所述繁忙的子信道为 空闲子信道。
26、 一种数据传输设备, 其特征在于, 包括:
请求接收单元, 用于作为第一接收端接收来自发送端的信道请求帧; 目的确定单元,用于在所述请求接收单元接收到来自发送端的信道请求帧 后, 确定自身是否为所述信道请求帧的目的接收端;
响应发送单元, 用于若所述目的确定单元确定结果为是, 并且所述请求帧 对应的子信道为空闲, 则在空闲的子信道中向发送端发送信道响应帧, 所述信 道响应帧携带第二信道指示信息,所述第二信道指示信息指示信道响应帧发送 的子信道;
数据接收单元,用于在所述相依发送单元发送信道响应帧的子信道中接收 来自所述发送端的数据。
27、 根据权利要求 26所述数据传输设备, 其特征在于,
所述响应发送单元, 用于发送所述信道响应帧的子信道不连续。
28、 根据权利要求 26或 27所述数据传输设备, 其特征在于, 还包括: 监听单元,用于若所述目的确定单元确定第一接收端不是所述信道请求帧 的目的端,通过监听所述信道请求帧对应的子信道,在短帧间隔时间长度之后 接收来自所述信道请求帧的目的接收端的信道响应帧;
繁忙确定单元, 用于若所述监听单元在分组控制功能帧间隔内,接收到来 自所述信道请求帧的目的接收端的信道响应帧,则确定所述信道请求帧对应的 子信道繁忙。
29、 根据权利要求 28所述数据传输设备, 其特征在于, 还包括: 向量设置单元,用于根据所述监听单元接收到的信道响应帧中的时长指示 信息设置所述信道请求帧对应的子信道的网络分配向量;若所述监听单元在分 组控制功能帧间隔内, 未接收来自所述信道请求帧的目的接收端的信道响应 帧, 则确定所述信道请求帧对应的子信道的网络分配向量不需要更新。
30、 根据权利要求 26或 27所述数据传输设备, 其特征在于, 还包括: 信道确定单元,用于确定请求帧对应的子信道是否为第二基本服务组的子 信道, 第一基本服务为所述第一接收端所在的基本服务组;
可用性确定单元,用于若所述信道确定单元确定所述信道请求帧对应的子 信道是第二基本服务组的子信道,则确定所述信道请求帧对应的子信道是否可 用;
所述响应发送单元, 用于若所述可用性确定单元确定结果为可用, 则向发 送端发送信道响应帧。
31、 根据权利要求 30所述数据传输设备, 其特征在于,
所述可用性确定单元,用于确定在预定的时长内在所述信道请求帧对应的 子信道未接收到所述第二基本服务组的信号,则确定所述信道请求帧对应的子 信道可用; 或者,通过所述第二基本服务组的通信状态确定所述信道请求帧对 应的子信道在信道请求帧所请求的时间内是否可用。
32、 根据权利要求 31所述数据传输设备, 其特征在于,
所述可用性确定单元, 具体用于确定子信道是否可用的通信记录包括: 第 二基本服务组的终端緩存信息、 队列信息、 竟争窗口信息、 回退时间信息中的 至少一项。
33、 根据权利要求 26或 27所述数据传输设备, 其特征在于, 若所述数据 传输设备为基本服务组的接入点, 所述数据传输设备还包括:
第二终端确定单元,用于确定接入点所在的基本服务组是否存在特定终端 作为接收端;
所述响应发送单元, 用于若所述第二终端确定单元确定结果为存在, 则在 所有子信道中均不发送信道响应帧;若所述第二终端确定单元确定结果为不存 在,则在所述接入点所在的基本服务组中不包含主信道的空闲子信道中发送信 道响应帧。
34、 根据权利要求 33所述数据传输设备, 其特征在于, 还包括: 回退流程控制单元, 用于若主信道以及所有子信道均空闲, 则指示信道空 闲可以继续回退流程; 若主信道空闲, 所述接入点所在基本服务组内部分子信 道繁忙,且所述部分子信道繁忙是由于所述基本服务组内数据传输导致, 则指 示信道繁忙并保持回退流程暂停。
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