WO2015127658A1 - 数据传输方法和通信设备 - Google Patents

数据传输方法和通信设备 Download PDF

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Publication number
WO2015127658A1
WO2015127658A1 PCT/CN2014/072728 CN2014072728W WO2015127658A1 WO 2015127658 A1 WO2015127658 A1 WO 2015127658A1 CN 2014072728 W CN2014072728 W CN 2014072728W WO 2015127658 A1 WO2015127658 A1 WO 2015127658A1
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WO
WIPO (PCT)
Prior art keywords
data
idle
sending
channel
sending end
Prior art date
Application number
PCT/CN2014/072728
Other languages
English (en)
French (fr)
Inventor
李波
杨博
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/CN2014/072728 priority Critical patent/WO2015127658A1/zh
Priority to CN201480041597.2A priority patent/CN105432035B/zh
Publication of WO2015127658A1 publication Critical patent/WO2015127658A1/zh
Priority to US15/248,790 priority patent/US10601550B2/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/02Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/08Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607Details of the supervisory signal
    • H04L1/1657Implicit acknowledgement of correct or incorrect reception, e.g. with a moving window
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/08Non-scheduled access, e.g. ALOHA
    • H04W74/0808Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H04W74/0816Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA] with collision avoidance
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W84/00Network topologies
    • H04W84/02Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10Small scale networks; Flat hierarchical networks
    • H04W84/12WLAN [Wireless Local Area Networks]

Definitions

  • Embodiments of the present invention relate to communication technologies, and in particular, to a data transmission method and a communication device. Background technique
  • WiFi Wireless Fidelity
  • 802.11a/b/g technology can not meet the increasing demand due to the data throughput. Therefore, in order to provide higher data throughput, The Institute of Electrical and Electronics Engineers (IEEE) working group introduced the 802.11n standard to increase the transmission rate of WiFi from 54 Mbps provided by 802.11a and 802.11g to 300 Mbps or even 600 Mbps.
  • IEEE Institute of Electrical and Electronics Engineers
  • the most direct way to increase the network capacity is to increase the communication bandwidth.
  • the traditional wireless technology can only transmit data on one of several channels of 20MHz bandwidth (the channel bandwidth is 20MHz).
  • the channel bandwidth is 20MHz.
  • a channel bonding technique is introduced, which combines two adjacent 20 MHz channels to double the communication bandwidth.
  • WiFi 2.4GHz has only three non-overlapping 20MHz channels, up to two 20MHz channels can be bound to 802.11n to form 40MHz channel resources.
  • the IEEE further optimized 802.11n by operating 802.11ac in the 5 GHz band, which is to increase channel bonding from 20 MHz and 40 MHz in the 802.11 ⁇ standard to 80 MHz. Even 160MHz, which makes the available spectrum wider and wider, and more available channels.
  • the 802.11ac defines a Request To Send (RTS) and a Clear To Send (CTS) protocol based on the channel bonding technology, and has the following two features:
  • RTS Request To Send
  • CTS Clear To Send
  • the transmitting end is within the available bandwidth (assuming the available bandwidth is 80 MHz, including 4 bonded 20 MHz channels).
  • the RTS frame is copied 3 times in a 20 MHz manner and then filled with 80 MHz, and transmitted on the 80 MHz bandwidth.
  • RTS frames are simultaneously transmitted on four 20 MHz channels; after that, the receiving end detects the available channel and bandwidth, and if a part of the available bandwidth is being used, the receiving end is only used on another part of the available bandwidth that is not used.
  • the sender responds to the CTS frame to the sender, and reporting the currently available bandwidth of the receiver in the CTS frame (if the currently available bandwidth is 40MHz, the 40MHz must contain the primary channel); the sender sends a data at this 40MHz, so that the receiver is A Block ACK (hereinafter referred to as BA) frame is acknowledged on the corresponding channel, so that the sender confirms whether the data is successfully transmitted.
  • BA Block ACK
  • the present invention provides a data transmission method and a communication device for solving the technical problem that the data transmission is low in the prior art and the channel usage is not flexible enough.
  • the present invention provides a communication device, including:
  • a determining module configured to perform a determining operation, to determine a number of the first idle channels
  • a sending module configured to send data to the receiving end on each of the first idle channels
  • a determining module configured to determine whether to resend the Said data; if yes, instructing said determining module to continue performing said determining operation until said determining said transmitting module does not need to resend said data; if not, instructing said transmitting module to no longer transmit said data.
  • the determining module is specifically configured to determine a second idle channel that the communication device is currently capable of accessing; and according to the second idle channel And determining, by the sending module, the number of the first idle channels for transmitting data.
  • the sending module is specifically configured to adopt the same or different on each of the first idle channels.
  • the redundancy version sends the data to the receiving end to cause the receiving end to decode the data.
  • the determining module is specifically configured to: if the number of the second idle channels is equal to 1, determine that the number of the first idle channels is equal to 1; if the number of the second idle channels is greater than 1. Determine that the number of the first idle channels is greater than or equal to 1, and is less than or equal to the number of the second idle channels.
  • the determining module is further configured to determine whether the data sent by the sending module is the first transmission; If yes, the determining module determines that the number of the first idle channels is equal to 1; if not, the determining module determines that the number of the first idle channels is greater than or equal to 1, and is less than or equal to the second idle The number of channels.
  • the sending module is configured to send the data to the receiving end on the first idle channel by using a unicast manner;
  • the determining module is specifically configured to determine whether the data is successfully transmitted; if yes, instructing the sending module to not send the data; if not, determining whether the accumulated number of times of the data exceeds a preset transmission The total number of times; if yes, instructing the sending module to not send the data; if not, instructing the determining module to continue performing the determining operation until it is determined that the sending module does not need to resend the data.
  • the sending module is configured to send the data to the receiving end on the first idle channel by using a multicast manner;
  • the determining module is specifically configured to determine whether the accumulated number of times of sending the data exceeds a preset total number of transmissions; if yes, instructing the sending module to not send the data; if not, indicating the determining module The determining operation is continued until it is determined that the transmitting module does not need to resend the data.
  • the sending module is configured to send, by using a multicast manner, the data to the receiving end on the first idle channel,
  • the data is a set of data; and the block acknowledgement request BAR frame is sent to the receiving end in a unicast manner on the first idle channel, so that the receiving end is configured according to the BAR frame.
  • the sender sends a block acknowledgement BA frame.
  • the determining module is configured to determine, according to the BA frame, whether the data is all successfully transmitted; If all the data is successfully transmitted, the sending module is instructed to not send the Data; if the data part is successfully transmitted, instructing the determining module to continue performing the determining operation until it is determined that the sending module does not need to resend the data of the transmission failure in the data.
  • the second idle channel is determined in a manner of requesting transmission-allowing to send an RTS-CTS handshake.
  • the present invention provides a data transmission method, including:
  • the transmitting end performs a determining operation to determine the number of the first idle channels
  • the sending end performs a determining operation to determine the number of the first idle channels, including:
  • the transmitting end determines a second idle channel that the user can currently access
  • the transmitting end determines, according to the second idle channel, the number of the first idle channels that the transmitting end sends data.
  • the sending end sends the data to the receiving end on each of the first idle channels , including:
  • the transmitting end sends the data to the receiving end by using the same or different redundancy version on each of the first idle channels, so that the receiving end decodes the data.
  • the sending end determines, according to the second idle channel, the The number of idle channels, including:
  • the transmitting end determines that the number of the first idle channels is equal to 1;
  • the transmitting end determines that the number of the first idle channels is greater than or equal to 1, and is less than or equal to the number of the second idle channels.
  • the sending end determines, according to the second idle channel, the The number of idle channels, including:
  • the sending end determines whether the current data is currently transmitted for the first time
  • the sending end determines that the number of the first idle channels is equal to 1;
  • the transmitting end determines that the number of the first idle channels is greater than or equal to 1, and is less than or equal to the number of the second idle channels.
  • the sending end determines whether to resend the data, including:
  • the sending end determines whether the data is successfully transmitted
  • the sending end determines whether the accumulated number of times of sending the data exceeds a preset total number of transmissions; if yes, the sending end does not send the data; if not, the sending end continues to execute the The determining operation is performed until the transmitting end determines that the data does not need to be resent.
  • the sending end determines whether to resend the data, including:
  • the sending end determines whether the accumulated number of times of sending the data exceeds a preset total number of transmissions; if yes, the sending end does not send the data; if not, the sending end continues to perform the determining operation, Until the sender determines that the data does not need to be resent.
  • the sending, by the sending end, the sending the data to the receiving end on the first idle channel including:
  • the transmitting end sends the data to the receiving end on the first idle channel in a multicast manner, where the data is a group of data;
  • the determining, by the sending end, whether to resend the data includes:
  • the second idle channel that the user is currently able to access includes:
  • the transmitting end determines the second idle channel by requesting to send an RTS-CTS handshake.
  • the data transmission method and the communication device provided by the present invention determine the number of the first idle channels by the transmitting end, so that the transmitting end sends data to the receiving end on each of the first idle channels, and determines whether the data needs to be resent to the receiving. To ensure the correct transmission of data.
  • the data transmission method provided by the invention improves the robustness of data transmission and improves the utilization and flexibility of the channel.
  • Embodiment 1 is a schematic structural diagram of Embodiment 1 of a communication device according to the present invention.
  • FIG. 2 is a schematic diagram 1 of a data transmission access sequence provided by the present invention.
  • FIG. 3 is a schematic diagram 2 of a data transmission access sequence provided by the present invention.
  • FIG. 4 is a schematic diagram 3 of a data transmission access sequence provided by the present invention.
  • FIG. 5 is a schematic diagram 4 of a data transmission access sequence provided by the present invention.
  • FIG. 6 is a schematic diagram 5 of a data transmission access sequence provided by the present invention
  • FIG. 7 is a schematic diagram 6 of a data transmission access sequence provided by the present invention
  • FIG. 8 is a schematic diagram 7 of a data transmission access sequence provided by the present invention.
  • FIG. 9 is a schematic structural diagram of Embodiment 2 of a communication device according to the present invention.
  • FIG. 10 is a schematic flowchart diagram of Embodiment 1 of a data transmission method according to the present invention. detailed description
  • the communication device in the embodiment of the present invention may be a user equipment, a base station device, or a wireless access point, which is not limited in this embodiment of the present invention.
  • the terminal involved in the embodiment of the present invention may be a wireless terminal or a wired terminal.
  • the wireless terminal can be a device that provides voice and/or data connectivity to the user, a handheld device with wireless connectivity, or other processing device that is connected to the wireless modem.
  • the wireless terminal can communicate with one or more core networks via a radio access network (eg, RAN, Radio Access Network), which can be a mobile terminal, such as a mobile phone (or "cellular" phone) and with a mobile terminal
  • RAN Radio Access Network
  • the computers for example, can be portable, pocket-sized, handheld, computer-integrated or in-vehicle mobile devices that exchange language and/or data with the wireless access network.
  • a wireless terminal may also be called a system, a Subscriber Unit, a Subscriber Station, a Mobi Le Station, a Mobi le, a Remote Stat, and a Remote Terminal. Terminal ), Access Terminal, User Terminal, User Agent, User Device, or User Equipment.
  • PCS Personal Communication Service
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • a wireless terminal may also be called a system, a Subscriber Unit, a Subscriber Station, a Mobi Le Station, a Mobi le, a Remote Stat, and a Remote Terminal.
  • Terminal Access Terminal, User Terminal, User Agent, User Device, or User Equipment.
  • the base station involved in the present application may be an access point of a WLAN, or may refer to an access network that communicates with a wireless terminal through one or more sectors on an air interface.
  • Equipment If the communication device is a user equipment, the receiving end that performs data transmission with the communication device may be a base station device or a wireless access point; if the communication device is a base station device or a wireless access point, perform data transmission with the communication device.
  • the receiving end can be a user equipment.
  • the communication device according to the embodiment of the present invention can be applied to a scenario of data transmission in a Wireless Local Area Network (WLAN), and the communication device has a busy state for sensing multiple channels and can be in multiple channels. The ability to send or receive data in parallel.
  • the embodiment of the present invention is described by taking data transmission in a WLAN as an example.
  • FIG. 1 is a schematic structural diagram of Embodiment 1 of a communication device according to the present invention.
  • the communication device includes: a processor 10 and a transmitter 11.
  • the processor 10 is configured to perform a determining operation to determine the number of first idle channels, and the transmitter 11 is configured to The first idle channel transmits data to the receiving end; the processor 10 is further configured to determine whether to resend the data; if yes, the processor 10 continues to perform the determining operation until the determining that the transmitter 11 does not need to resend the data So; if not, the transmitter 11 is instructed to no longer send the data.
  • the processor 10 pre-arranges with the receiving end an available channel that may be needed for future data transmission, where the available channel may be all channels in the WLAN system (the bandwidth of each channel is 20 MHz), and may also be the processor 10 and Two or more available channels determined by the receiving end by some convention.
  • the processor 10 performs a determining operation to determine the number of first idle channels on the available channels, where the first idle channel may be determined by the processor 10 through competition or the like, and will not communicate with other communication devices when transmitting data in the future.
  • the first idle channel determined above may or may not include the primary channel; the number of the first idle channels may be one or multiple. If there are multiple first idle channels, the multiple first idle channels may not be continuous, that is, the first idle channel is not limited in the embodiment of the present invention, and the channel utilization and flexibility may be improved.
  • the processor 10 instructs the transmitter 11 to transmit data to the receiving end on each of the first idle channels determined above, so that the receiving end decodes the data accordingly. Moreover, the processor 10 can also accumulate the number of times the data is transmitted. If the data is sent on a first idle channel, it indicates that the data is sent once. If the data is sent on multiple first idle channels, the data is sent. Many times.
  • the processor 10 determines whether it is necessary to resend the above data.
  • the processor 10 may determine that the transmitter 11 is not required to resend the data; if the data transmission sent by the transmitter 11 to the receiving end fails, the processor 10 determines the transmitter. 11 may need to resend the data.
  • the processor 10 determines that the transmitter 11 needs to resend the above data, the processor 10 returns a re-execution determining operation to re-determine the number of first idle channels and instructs the transmitter 11 to re-in each of the first idle channels.
  • the above data is sent to the receiving end until the processor 10 determines that the transmitter 11 no longer needs to resend the above data. If the processor 10 determines that the transmitter 11 does not need to resend the above data, the processor 10 instructs the transmitter 11 to no longer transmit the above data to the receiving end.
  • the communication device provided by the embodiment of the present invention determines, by the processor, the number of the first idle channels, so that the transmitter sends data to the receiving end on each of the determined first idle channels, and the processor further determines whether the data needs to be re-required. Send to the receiver to ensure the correct transmission of data.
  • the communication device provided by the embodiment of the present invention enables data to be transmitted on multiple first idle channels at the same time, and may also select multiple first idle channels for transmission when data needs to be retransmitted, thereby improving data transmission robustness.
  • the plurality of first idle channels in the embodiment of the present invention may not include the primary channel, or may not be a continuous channel, thereby improving channel utilization and flexibility.
  • the above transmitter 11 may transmit the data to the receiving end on each of the first idle channels using the same or different redundancy versions.
  • the receiving end can simultaneously receive data on the corresponding plurality of first idle channels simultaneously. Gp, on which first idle channel the transmitting end transmits data, and the receiving end receives the data on the channel.
  • the receiving end also has the capability of receiving data transmitted by other communication devices on other channels.
  • the receiving end may separately decode the same data from different first idle channels, or combine the data on the multiple first idle channels for joint decoding to reduce the packet error rate at the receiving end.
  • the tracking combination in HARQ can be used as the joint decoding mode, that is, the receiving end combines the received data by using the maximum ratio combining principle.
  • the incremental redundancy in HARQ can be used as the joint decoding mode, that is, the receiving end pairs are not
  • the data with different redundancy versions on the same channel are merged. Since the data of different redundancy versions may contain additional parity bits that the other party does not have, the combined codewords have stronger error correction capability.
  • the embodiment relates to that when the transmitter 11 sends data to the receiving end in a unicast manner, the processor 11 determines the first idle.
  • the processor 10 is specifically configured to determine a second idle channel that the communication device can currently access; and determine, according to the second idle channel, the number of first idle channels that the transmitter 11 sends data.
  • the processor 10 determines that the number of the first idle channels is equal to 1; if the number of the second idle channels is greater than 1, the processor 10 determines that the number of the first idle channels is greater than It is equal to 1, and is less than or equal to the number of second idle channels.
  • the processor 10 performs parallel interception backoff, and after the backoff process ends, detecting There are at least one second idle channel. If the number (k) of the second idle channel is equal to 1, the processor 10 determines that the number of the first idle channels is equal to 1; if the number (k) of the second idle channels is greater than 1, the processor 10 determines the first The number of idle channels is greater than or equal to 1, and is less than or equal to the number of second idle channels.
  • the processor 10 selects the first idle channel in the at least one second idle channel and notifies the transmitter to transmit data on each of the first idle channels without exceeding the total number of transmissions. If the number of the second idle channels is greater than 1, the processor 10 selects at least one first idle channel in the second idle channel, that is, the number of the first idle channels is greater than or equal to 1, and is less than or equal to the second idle channel. Number. For example, referring to Fig. 2, two first idle channels, channel 1 and channel 2, are selected in Fig. 2, and the transmitter 11 transmits the same data in parallel on the channel 1 and channel 2 with the same or different redundant versions, respectively. If the number of second idle channels is equal to 1, the processor 10 selects only one idle channel. Referring to channel 1 in FIG. 3, the transmitter 11 transmits a data on the channel 1, and the data is retransmitted, the processor 10 Multiple first idle channels are selected (one first idle channel can also be selected).
  • the processor 10 determines whether the data is successfully transmitted (the processor 10 may have its own judgment mechanism, and may also determine the ACK response of the receiving end); if so, the transmitter 11 is no longer indicated. Sending the data; if not, determining whether the accumulated number of transmissions of the data exceeds a preset total number of transmissions; if the total number of transmissions is exceeded, the transmitter 11 is instructed not to transmit the data; if the total number of transmissions is not exceeded, the processing is The device 10 continues to perform the above-described determination operation until it is determined that the transmitter 11 does not need to resend the data. Gp, the processor 10 re-determines the number of the first idle channels (the number of the second idle channels is greater than 1 when the retransmission is determined in FIG.
  • the number of the determined first idle channels is two), and the indication is sent.
  • the device 11 resends the data; and re-determines whether the data is successfully transmitted; if the transmission is successful, the transmitter 11 is no longer sent the data; if the transmission is unsuccessful, it continues to determine whether the accumulated number of times of the data exceeds the total number of transmissions Until the processor 10 determines that the cumulative number of transmissions of the data reaches the total number of transmissions, the transmitter 11 is instructed to no longer transmit the data.
  • the communication device provided by the embodiment of the present invention determines, by the processor, a second idle channel that the communication device can access, and determines the number of the first idle channel according to the second idle channel, so that the transmitter is determined to be the first one.
  • the idle channel transmits data to the receiving end, and the processor also determines whether the data needs to be resent to the receiving end to ensure correct transmission of the data.
  • the communication device provided by the embodiment of the present invention enables data to be transmitted on multiple first idle channels at the same time, and may also select multiple first idle channels for transmission when data needs to be retransmitted, thereby improving data transmission robustness.
  • the plurality of first idle channels in the embodiment of the present invention may not include the primary channel, or may not be a continuous channel, thereby improving channel utilization and flexibility.
  • the embodiment relates to that when the transmitter 11 sends data to the receiving end in a unicast manner, the processor 11 determines the first idle. The number of channels and another specific process of determining whether the transmitter 11 needs to resend the above data. Further, the processor 10 is specifically configured to determine a second idle channel that the communication device is currently capable of accessing; and determine, according to the second idle channel, the number of first idle channels that the transmitter 11 transmits data.
  • the processor 10 is specifically configured to determine whether the data currently sent by the transmitter 11 is the first transmission; if yes, determine that the number of the first idle channels is equal to 1; if not, determine that the number of the first idle channels is greater than It is equal to 1, and is less than or equal to the number of second idle channels.
  • the processor 10 performs parallel interception backoff.
  • the backoff process ends, at least one second idle channel is detected.
  • the processor 10 determines whether the data currently transmitted by the transmitter 11 is the first transmission, and if so, the processor 10 determines that the number of the first idle channels is equal to 1; if not, the processor 10 determines that the number of the first idle channels is greater than or equal to 1, and less than or equal to the number of second idle channels; gp, if the transmitter 11 is currently resending data (ie, retransmission of data), the processor 10 selects one or more first idle channels for the transmitter 11 used, it is shown in Fig. 4 that the transmitter 11 selects a first idle channel when transmitting for the first time, and selects a plurality of first idle channels when retransmitting the data.
  • the processor 10 selects one of the first idle channels in the at least one second idle channel and instructs the transmitter to transmit data on the first idle channel. Moreover, the processor 10 determines whether the data is successfully transmitted; if yes, instructs the transmitter 11 not to transmit the data; if not, determines whether the accumulated number of times of the data exceeds a preset total number of transmissions; if the total number of transmissions is exceeded Then, the transmitter 11 is instructed to no longer transmit the data; if the total number of transmissions is not exceeded, the processor 10 continues to perform the above determining operation until it is determined that the transmitter 11 does not need to resend the data.
  • the processor 10 re-determines whether the transmitter 11 is currently transmitting for the first time (of course, the processor 10 re-executes the determining operation, meaning that the data transmission of the first transmission by the transmitter 11 fails, the transmitter 11 is not the first transmission at this time. And re-determining the number of the first idle channels (the number of the first idle channels determined at this time may be one or more), and instructing the transmitter 11 to resend the data; and re-determining the data Whether the transmission is successful; if the transmission is successful, the transmitter 11 is instructed to no longer send the data; if the transmission is unsuccessful, it continues to determine whether the accumulated number of transmissions of the data exceeds the total number of transmissions until the processor 10 determines the cumulative number of transmissions of the data. When the total number of transmissions is reached, it is instructed that the transmitter 11 no longer transmits the data.
  • the communication device provided by the embodiment of the present invention determines, by the processor, a second idle channel that the communication device can access, and determines whether the current transmit data of the transmitter is the first transmission, and determines the first idle channel in the second idle channel.
  • the number is such that the transmitter transmits data to the receiving end on each of the determined first idle channels, and the processor further determines whether the data needs to be resent to the receiving end to ensure correct transmission of the data.
  • the communication device provided by the embodiment of the present invention enables data to be transmitted on multiple first idle channels at the same time, and may also select multiple first idle channels for transmission when data needs to be retransmitted, thereby improving data transmission robustness. And, the multiple first idle channels in the embodiment of the present invention may not include the primary channel, or may not be consecutive letters.
  • the embodiment relates to that when the transmitter 11 transmits data to the receiving end in a multicast manner, the processor 11 determines the first idle.
  • the processor 10 is specifically configured to determine a second idle channel that the communication device can currently access; and determine, according to the second idle channel, the number of first idle channels that the transmitter 11 sends data.
  • the processor 10 determines that the number of the first idle channels is equal to 1; if the number of the second idle channels is greater than 1, the processor 10 determines that the number of the first idle channels is greater than It is equal to 1, and is less than or equal to the number of second idle channels.
  • the processor 10 when the transmitter 11 transmits data to the receiving end by using the same or different redundancy versions on each first idle channel by using the multicast mode, the processor 10 performs parallel interception backoff, and after the backoff process ends, detecting There are at least one second idle channel. If the number of the second idle channels is equal to 1, the processor 10 determines that the number of the first idle channels is equal to 1; if the number of the second idle channels is greater than 1, the processor 10 determines that the number of the first idle channels is greater than It is equal to 1, and is less than or equal to the number of second idle channels.
  • the processor 10 does not need to determine whether the data is successfully transmitted, and only needs to directly determine whether the accumulated number of times of the data exceeds a preset total number of transmissions; if the accumulated number of times of the data exceeds the total number of transmissions, the process is processed.
  • the processor 10 instructs the transmitter 11 to no longer transmit the data; if the total number of transmissions has not been exceeded, the processor 10 continues to perform the above-described determination operation until it is determined that the transmitter 11 does not need to resend the data. Gp, the processor 10 redetermines the number of the first idle channels (see FIG. 5 and FIG.
  • the transmitter 11 instructs the transmitter 11 to resend the data; and determines whether the cumulative number of times the data is transmitted exceeds the total number of transmissions until the processor 10 When it is determined that the cumulative number of transmissions of the data reaches the total number of transmissions, the transmitter 11 is instructed not to transmit the data.
  • the example shown in FIG. 5 is that the processor 10 selects two first idle channels when the data is first transmitted. (The number k of the second idle channels determined by the processor 10 is greater than 1, and the determined first idle channel is determined. The number of the two is channel 1, channel 2).
  • the processor 10 selects three idle channels (channel 1, channel 2 and channel 3) because the processor 10 determines the second idle channel when the transmitter 11 transmits the data again.
  • the number k is greater than 1.
  • the communication device provided by the embodiment of the present invention determines, by the processor, a second idle channel that the communication device can access, and determines the number of the first idle channel according to the second idle channel, so that the transmitter is determined to be the first one.
  • the idle channel transmits data to the receiving end, and the processor also determines whether the data needs to be resent to the receiving end to ensure correct transmission of the data.
  • the communication device provided by the embodiment of the present invention enables data to be transmitted on multiple first idle channels at the same time, and may also select multiple first idle channels for transmission when data needs to be retransmitted, thereby improving data transmission robustness.
  • the plurality of first idle channels in the embodiment of the present invention may not include the primary channel, or may not be a continuous channel, thereby improving channel utilization and flexibility.
  • the embodiment relates to that when the transmitter 11 sends a group of data to the receiving end in a multicast manner, the processor 11 determines The number of idle channels and the specific process of determining whether the transmitter 11 needs to resend the above data. Further, the processor 10 is specifically configured to determine a second idle channel that the communication device is currently capable of accessing; and determine, according to the second idle channel, the number of first idle channels that the transmitter 11 transmits data.
  • the processor 10 determines that the number of the first idle channels is equal to 1; if the number of the second idle channels is greater than 1, the processor 10 determines that the number of the first idle channels is greater than It is equal to 1, and is less than or equal to the number of second idle channels.
  • the processor 10 performs parallel interception backoff, when the backoff process After the end, it is detected that there is at least one second idle channel. If the number of the second idle channels is equal to 1, the processor 10 determines that the number of the first idle channels is equal to 1; if the number of the second idle channels is greater than 1, the processor 10 determines that the number of the first idle channels is greater than It is equal to 1, and is less than or equal to the number of second idle channels. As shown in FIG. 7, when the number of second idle channels is greater than 1, when the transmitter 11 first transmits data, the processor 10 selects two firsts. The idle channel (channel 1 and channel 3), and the same set of data, including data (Data) 1, Data2, and Data3, are continuously transmitted in parallel on the channel 1 and channel 3, respectively, in the same or different redundancy versions.
  • the transmitter 11 transmits the BAR frame in unicast mode to all the receiving ends on the selected first idle channel (for example, channel 1 and channel 3 in FIG. 7), so that each receiving end replies to the communication device with the BA frame. .
  • the processor 10 determines whether all the data in the group is successfully transmitted according to the plurality of BA frames that are replied. If all the data in the group is successfully transmitted, the processor 10 instructs the transmitter 11 not to transmit the group of data; if the data portion in the group is successfully transmitted, the processor 10 continues to perform the above determining operation until the transmitter 11 is determined. It is not necessary to resend the data of the transmission failure in the data in the group. As shown in FIG.
  • the processor 10 selects a first idle channel (channel 3), and part of the data (Data2 in FIG. 8) in the set of data is transmitted. Upon failure, the processor 10 selects two first idle channels (channel 2 and channel 3) for the transmitter 11 to retransmit the failed data, and the transmitter 11 transmits Data2 on channel 2 and channel 3, and still in both The BAR frame is transmitted on one channel.
  • the processor 11 may determine, by using an RTS-CTS handshake, a second idle channel that the communication device can access.
  • the communication device provided by the embodiment of the present invention determines, by the processor, a second idle channel that the communication device can access, and determines the number of the first idle channel according to the second idle channel, so that the transmitter is determined to be the first one.
  • the idle channel transmits data to the receiving end, and the processor also determines whether the data needs to be resent to the receiving end to ensure correct transmission of the data.
  • the communication device provided by the embodiment of the present invention enables data to be transmitted on multiple first idle channels at the same time, and may also select multiple first idle channels for transmission when data needs to be retransmitted, thereby improving data transmission robustness.
  • FIG. 9 is a schematic structural diagram of Embodiment 2 of a communication device according to the present invention. As shown in FIG. 9, the communication device includes: a determining module 20, a sending module 21, and a determining module 22.
  • the determining module 20 is configured to perform a determining operation to determine the number of the first idle channels, and the sending module 21 is configured to send data to the receiving end on each of the first idle channels, and the determining module 22 is further configured to determine Whether to resend the data; if yes, the instruction determining module 20 continues to perform the above determining operation until it is determined that the transmitting module 21 does not need to resend the data; if not, the indication The transmitting module 21 no longer transmits the data.
  • the communication device pre-arranges with the receiving end an available channel that may be needed for future data transmission, where the available channel may be all channels in the WLAN system (the bandwidth of each channel is 20 MHz), and may also be a communication device and a receiving end. Two or more available channels determined by some convention.
  • the determining module 20 performs a determining operation to determine the number of the first idle channels on the available channels, where the first idle channel may be determined by the determining module 20 through competition or the like, and will not communicate with other communication devices when transmitting data in the future.
  • the first idle channel determined above may or may not include the primary channel; the number of the first idle channels may be one or multiple. If there are multiple first idle channels, the multiple first idle channels may not be contiguous, that is, the first idle channel is not limited in the embodiment of the present invention, and channel utilization and flexibility may be improved.
  • the sending module 21 sends data to the receiving end on each of the first idle channels determined above, so that the receiving end decodes the data accordingly.
  • the determining module 20 may further accumulate the number of times the data is sent. If the data is sent on a first idle channel, it indicates that the data is sent once. If the data is sent on multiple first idle channels, the data is indicated. Sent multiple times.
  • the determining module 22 does not need to instruct the sending module 21 to resend the data. Therefore, in order to ensure successful transmission of data, the judging module 22 also needs to determine whether it is necessary to resend the above data.
  • the determining module 22 may determine that the sending module 21 does not need to resend the data; if the data transmission sent by the sending module 21 to the receiving end fails, the determining module 22 determines the sending module. 21 may need to resend the data.
  • the determining module 22 determines that the sending module 21 needs to resend the data, the determining module 20 returns to the re-execution determining operation to re-determine the number of the first idle channels, and instructs the sending module 21 to re-in each of the first idle channels.
  • the above data is sent to the receiving end until the determining module 22 determines that the transmitting module 21 no longer needs to resend the data. If the determining module 22 determines that the sending module 21 does not need to resend the data, the determining module 22 instructs the sending module 21 not to send the data to the receiving end.
  • the communication device provided by the embodiment of the present invention determines the number of the first idle channels by the determining module, so that the sending module sends data to the receiving end on each of the determined first idle channels, and determines whether the data needs to be re-required through the determining module. Send to the receiver to ensure the correct transmission of data.
  • the communication device provided by the embodiment of the present invention enables data to be transmitted on multiple first idle channels at the same time, and may also select multiple first idle channels for transmission when data needs to be retransmitted, thereby improving data transmission robustness.
  • the plurality of first idle channels in the embodiment of the present invention may not include the primary channel, or may not be a continuous channel, thereby improving channel utilization and flexibility.
  • the foregoing sending module 21 may send the data to the receiving end on each first idle channel by using the same or different redundancy versions.
  • the receiving end can simultaneously receive data on the corresponding plurality of first idle channels simultaneously. Gp, on which first idle channel the transmitting end transmits data, and the receiving end receives the data on the channel.
  • the receiving end also has the capability of receiving data transmitted by other communication devices on other channels.
  • the receiving end may separately decode the same data from different first idle channels, or combine the data on the multiple first idle channels for joint decoding to reduce the error rate of the receiving end.
  • the tracking combination in HARQ can be used as the joint decoding mode, that is, the receiving end combines the received data by using the maximum ratio combining principle.
  • the incremental redundancy in the HARQ can be used as the joint decoding mode, that is, the receiving end merges the data with different redundancy versions from different channels. Since the data of different redundancy versions may contain extra parity bits that the other party does not have, the combined codewords have stronger error correction capability.
  • the determining module 20 determines the first idle.
  • the number of channels and the determining module 22 determine whether the transmitting module 21 needs to resend the above data.
  • the determining module 20 is specifically configured to determine a second idle channel that the communications device can access currently; and determine, according to the second idle channel, the number of first idle channels that the sending module 21 sends data.
  • the determining module 20 determines that the number of the first idle channels is equal to 1; if the number of the second idle channels is greater than 1, the determining module 20 determines that the number of the first idle channels is greater than equal 1, and less than or equal to the number of second idle channels.
  • the communications device performs parallel interception backoff, and when the backoff process ends, the detected There is at least one second idle channel. If the number (k) of the second idle channel is equal to 1, the determining module 20 determines that the number of the first idle channels is equal to 1; if the number (k) of the second idle channels is greater than 1, the determining module 20 determines the first The number of idle channels is greater than or equal to 1, and is less than or equal to the number of second idle channels.
  • the determination module 20 selects the first idle channel among the at least one second idle channel without exceeding the total number of transmission times, and instructs the transmitting module 21 to transmit data on each of the first idle channels. If the number of the second idle channels is greater than 1, the determining module 20 selects at least one first idle channel in the second idle channel, that is, the number of the first idle channels is greater than or equal to 1, and is less than or equal to the second idle channel. Number. For example, referring to FIG. 2, two first idle channels, that is, channel 1 and channel 2 are selected in FIG. 2, and the transmitting module 21 transmits the same data in parallel on the channel 1 and the channel 2 with the same or different redundancy versions, respectively.
  • the determining module 20 selects only one idle channel. Referring to channel 1 in FIG. 3, the transmitting module 21 transmits a data on the channel 1, and the data is determined by the module 20 when retransmitting. A plurality of first idle channels are selected (one first idle channel can also be selected).
  • the determining module 22 determines whether the data is successfully transmitted (the determining module 22 may have its own judgment mechanism, and may also determine the ACK response of the receiving end); if yes, the sending module 21 does not send the data; if not, the data is determined. Whether the cumulative number of transmissions exceeds the preset total number of transmissions; if the total number of transmissions is exceeded, the indication sending module 21 no longer transmits the data; if the total number of transmissions is not exceeded, the indication determining module 20 continues to perform the above determining operation until it is determined The transmitting module 21 does not need to resend the data. Gp, determining module 20 re-determining the number of first idle channels (determining that the number of second idle channels is greater than 1 when retransmitting in FIG.
  • the module 21 resends the data; and re-determines whether the data is successfully transmitted; if the transmission is successful, the sending module 21 does not send the data; if the transmission is unsuccessful, it continues to determine whether the accumulated number of times of the data exceeds the total number of transmissions. Until the judging module 22 judges that the accumulated number of transmissions of the data reaches the total number of transmissions, the indication sending module 21 no longer transmits the data.
  • the communication device provided by the embodiment of the present invention determines, by using the determining module, that the communication device is currently capable Accessing the second idle channel, and determining the number of the first idle channel according to the second idle channel, so that the sending module sends data to the receiving end on each of the determined first idle channels, and determining whether the data is determined by the determining module Need to be resent to the receiver to ensure the correct transmission of data.
  • the communication device provided by the embodiment of the present invention enables data to be transmitted on multiple first idle channels at the same time, and may also select multiple first idle channels for transmission when data needs to be retransmitted, thereby improving data transmission robustness.
  • the plurality of first idle channels in the embodiment of the present invention may not include the primary channel, or may not be a continuous channel, thereby improving channel utilization and flexibility.
  • the embodiment relates to that when the sending module 21 sends data to the receiving end in a unicast manner, the determining module 20 determines the first idle.
  • the number of channels and the determining module 22 determine another specific process of whether the transmitting module 21 needs to resend the above data.
  • the determining module 20 is specifically configured to determine a second idle channel that the foregoing communications device can access; and determine, according to the second idle channel, the number of first idle channels that the sending module 21 sends data.
  • the determining module 22 is specifically configured to determine whether the data currently sent by the sending module 21 is the first transmission; if yes, the determining module 20 determines that the number of the first idle channels is equal to 1; if not, the determining module 20 determines the first idle.
  • the number of channels is greater than or equal to 1, and is less than or equal to the number of second idle channels.
  • the communications device performs parallel interception backoff, and when the backoff process ends, the detection is detected. There is at least one second idle channel.
  • the determining module 22 determines whether the data currently sent by the sending module 21 is the first transmission, and if so, the determining module 20 determines that the number of the first idle channels is equal to 1; if not, the determining module 20 determines that the number of the first idle channels is greater than or equal to 1, and less than or equal to the number of second idle channels; SP, if the sending module 21 is currently resending data (ie, retransmission of data), the determining module 20 selects one or more first idle channels for the transmitting module.
  • 21 used, shown in FIG. 4 is that the transmitting module 21 selects a first idle channel when transmitting for the first time, and selects a plurality of first idle channels when retransmitting the data.
  • the determining module 20 selects one first idle channel in the at least one second idle channel, and instructs the sending module to Data is transmitted on the first idle channel. Moreover, the determining module 22 determines whether the data is successfully transmitted; if yes, the sending module 21 does not send the data; if not, it determines whether the accumulated number of times of the data exceeds a preset total number of transmissions; Then, the sending module 21 is no longer sent the data; if the total number of transmissions is not exceeded, the indication determining module 20 continues to perform the above determining operation until it is determined that the transmitting module 21 does not need to resend the data.
  • the determining module 22 re-determines whether the sending module 21 is currently transmitting for the first time (of course, the determining module 20 performs the determining operation again, which means that the data transmission sent by the sending module 21 fails for the first time, and the sending module 21 is not the first transmission at this time.
  • the transmission module 21 determines whether the transmission is successful; if the transmission is successful, the sending module 21 does not send the data; if the transmission is unsuccessful, it continues to determine whether the accumulated number of times of the data exceeds the total number of transmissions until the determining module 22 determines the cumulative number of times the data is transmitted. When the total number of transmissions is reached, the transmission module 21 is instructed to no longer send the data.
  • the communication device provided by the embodiment of the present invention determines, by the determining module, a second idle channel that the communication device can access, and the determining module determines whether the current sending data of the sending module is the first transmission to determine the first idle channel in the second idle channel.
  • the number is such that the sending module sends data to the receiving end on each of the determined first idle channels, and the determining module further determines whether the data needs to be resent to the receiving end to ensure correct transmission of the data.
  • the communication device provided by the embodiment of the present invention enables data to be transmitted on multiple first idle channels at the same time, and may also select multiple first idle channels for transmission when data needs to be retransmitted, thereby improving data transmission robustness.
  • the plurality of first idle channels in the embodiment of the present invention may not include the primary channel, or may not be a continuous channel, thereby improving channel utilization and flexibility.
  • the embodiment relates to that when the sending module 21 sends data to the receiving end in a multicast manner, the determining module 20 determines the first idle.
  • the number of channels and the determining module 22 determine whether the transmitting module 21 needs to resend the above data.
  • the determining module 20 is specifically configured to determine a second idle channel that the foregoing communications device can access; and determine, according to the second idle channel, the number of first idle channels that the sending module 21 sends data.
  • the second free letter If the number of the channels is equal to 1, it is determined that the number of the first idle channels is equal to 1; if the number of the second idle channels is greater than 1, it is determined that the number of the first idle channels is greater than or equal to 1, and is less than or equal to the second idle channel. The number.
  • the communications device performs parallel interception backoff, and when the backoff process ends, the detection is detected.
  • the determining module 22 does not need to determine whether the data is successfully transmitted, and only needs to directly determine whether the accumulated number of times of the data exceeds a preset total number of transmissions; if the accumulated number of times of the data exceeds the total number of transmissions, The module 22 instructs the transmitting module 21 to no longer transmit the data; if the total number of transmissions is not exceeded, the indication determining module 20 continues to perform the above determining operation until it is determined that the transmitting module 21 does not need to resend the data. SP, the determining module 22 instructs the determining module 20 to redetermine the number of the first idle channel (see FIG. 5 and FIG.
  • the determining module 20 selects two first idle channels when the data is first transmitted (the number k of the second idle channels determined by the determining module 20 is greater than 1, and the determined first idle channel is determined.
  • the communication device provided by the embodiment of the present invention determines, by the determining module, a second idle channel that the communication device can access, and determines the number of the first idle channel according to the second idle channel.
  • the sending module sends data to the receiving end on each of the determined first idle channels, and determines whether the data needs to be resent to the receiving end through the determining module to ensure correct transmission of the data.
  • the communication device provided by the embodiment of the present invention enables data to be transmitted on multiple first idle channels at the same time, and may also select multiple first idle channels for transmission when data needs to be retransmitted, thereby improving data transmission robustness.
  • the plurality of first idle channels in the embodiment of the present invention may not include the primary channel, or may not be a continuous channel, thereby improving channel utilization and flexibility.
  • the determining module 20 determines A number of idle channels and a specific process by which the determining module 22 determines whether the transmitting module 21 needs to resend the above data. Further, the determining module 20 is specifically configured to determine a second idle channel that the communications device can access currently; and determine, according to the second idle channel, the number of first idle channels that the sending module 21 sends data.
  • the determining module 20 determines that the number of the first idle channels is equal to 1; if the number of the second idle channels is greater than 1, the determining module 20 determines that the number of the first idle channels is greater than It is equal to 1, and is less than or equal to the number of second idle channels.
  • the communications device performs parallel interception backoff, when the backoff process ends. Thereafter, at least one second idle channel is detected. If the number of the second idle channels is equal to 1, the determining module 20 determines that the number of the first idle channels is equal to 1; if the number of the second idle channels is greater than 1, the determining module 20 determines that the number of the first idle channels is greater than It is equal to 1, and is less than or equal to the number of second idle channels. It is shown in FIG.
  • the determining module 20 selects two first idle channels (channel 1 and channel 3), and on channel 1.
  • the same set of data (including Datal, Data2, and Data3) is continuously and continuously transmitted in parallel with channel 3 on the same or different redundancy versions.
  • the sending module 21 sends the BAR frame to all the receiving ends in unicast mode on the selected first idle channel (for example, channel 1 and channel 3 in FIG. 7), so that each receiving end replies to the BA frame with the communication device. .
  • the determining module 22 determines the group according to the plurality of BA frames that are replied Whether all the data in the data is successfully transmitted. If all the data in the group is successfully transmitted, the judgment module
  • the determining module 22 indicating that the sending module 21 no longer sends the set of data; if the data part of the group is successfully transmitted, the determining module 22 instructs the determining module 22 to continue performing the above determining operation until the determining sending module 21 does not need to resend the data in the group. The data in the transmission failed. As shown in FIG. 8, when the transmitting module 21 first transmits the set of data, the determining module 20 selects a first idle channel (channel 3), and part of the data (Data2 in FIG. 8) in the set of data is transmitted.
  • the determining module 20 selects two first idle channels (channel 2 and channel 3) for the transmitting module 21 to retransmit the failed data, and the transmitting module 21 transmits Data2 on channel 2 and channel 3, and still in both The BAR frame is transmitted on one channel.
  • the determining module 20 can pass
  • the manner in which the RTS-CTS handshake is performed determines the second idle channel that the communication device is currently able to access.
  • the communication device provided by the embodiment of the present invention determines, by the determining module, a second idle channel that the communication device can access, and determines the number of the first idle channel according to the second idle channel, so that the sending module determines each of the first The idle channel transmits data to the receiving end, and the determining module determines whether the data needs to be resent to the receiving end to ensure correct data transmission.
  • the communication device provided by the embodiment of the present invention enables data to be transmitted on multiple first idle channels at the same time, and may also select multiple first idle channels for transmission when data needs to be retransmitted, thereby improving data transmission robustness.
  • the plurality of first idle channels in the embodiment of the present invention may not include the primary channel, or may not be a continuous channel, thereby improving channel utilization and flexibility.
  • FIG. 10 is a schematic flowchart diagram of Embodiment 1 of a data transmission method according to the present invention.
  • the execution body of the method is a transmitting end, and the transmitting end may be the communication device in the above embodiment.
  • the method includes:
  • the transmitting end performs a determining operation to determine the number of the first idle channels.
  • the transmitting end sends data to the receiving end on each of the first idle channels.
  • the transmitting end determines whether to resend the data; if yes, the transmitting end continues to perform the determining operation until the transmitting end determines that the data does not need to be resent; if not, the transmitting end does not send the data.
  • the foregoing S101 may be specifically: the sending end determines a second idle channel that the user can access, and determines, according to the second idle channel, the first idle channel that the sending end sends data. number.
  • the sending end may determine the second idle channel by using an RTS-CTS handshake.
  • the foregoing S102 may be specifically: the sending end sends the data to the receiving end by using the same or different redundancy version on each of the first idle channels, so that the receiving end The data is decoded.
  • the foregoing S101 may include: if the number of the second idle channels is equal to 1, the transmitting end determines that the number of the first idle channels is equal to 1; if the number of the second idle channels If the number is greater than 1, the transmitting end determines that the number of the first idle channels is greater than or equal to 1, and is less than or equal to the number of the second idle channels.
  • the foregoing S101 may further include: the sending end determines whether the data currently sent is the first transmission; if yes, the sending end determines that the number of the first idle channel is equal to 1; if not, The transmitting end determines that the number of the first idle channels is greater than or equal to 1, and is less than or equal to the number of the second idle channels.
  • the sending end determines whether the data is successfully transmitted; if yes, the The sending end does not send the data; if not, the sending end determines whether the accumulated number of times of sending the data exceeds a preset total number of transmissions; if yes, the sending end does not send the data; And the sending end continues to perform the determining operation until the sending end determines that the data does not need to be resent.
  • the sending end When the sending end sends the data to the receiving end on the first idle channel, the sending end determines whether the accumulated number of times of the data exceeds a preset. The total number of transmissions; if yes, the transmitting end does not send the data; if not, the transmitting end continues to perform the determining operation until the transmitting end determines that the data does not need to be resent.
  • the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

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Abstract

本发明实施例提供一种数据传输方法和通信设备。该通信设备包括:确定模块,用于执行确定操作,以确定第一空闲信道的个数;发送模块,用于在每个第一空闲信道上向接收端发送数据;判断模块,用于判断是否重新发送该数据;若是,则指示确定模块继续执行确定操作,直至判断发送模块不需要重新发送该数据为止;若否,则指示发送模块不再发送该数据。本发明实施例提供的通信设备,使得数据可以同时在多个第一空闲信道上传输,并且在数据需要重新发送时也可以选择多个第一空闲信道来发送,提高了数据的传输鲁棒性和信道的利用率。

Description

数据传输方法和通信设备
技术领域
本发明实施例涉及通信技术, 尤其涉及一种数据传输方法和通信设 备。 背景技术
随着无线应用变得日益普遍, 人们对网络的可靠性和通信带宽的需求变 得更加紧迫。 目前的无线保真 (Wireless Fidelity, 以下简称 WiFi) 标准中, 由于 802.11a/b/g 技术所能够提供的数据吞吐量已经无法满足日益增长的需 求, 因此, 为了提供更高的数据吞吐量, 电气电子工程师学会 (Institute of Electrical and Electronics Engineers, 以下简称 IEEE) 工作组推出 802.11η标 准, 将 WiFi的传输速率由目前 802.11a和 802.11g提供的 54Mbps提高到 300Mbps, 甚至高达 600Mbps。
众所周知, 增加网络容量的最直接办法就是增加通信带宽, 然而传统的 无线技术只能局限在几个 20MHz频宽的信道中的选择一个信道(该信道频宽 为 20MHz) 上传送数据。 值得关注的是, 在 802.11η标准中, 引入了信道绑 定的技术,即结合两个相邻的 20MHz信道使得通信带宽增加了一倍。 但由于 WiFi的 2.4GHz只有 3个不重叠的 20MHz信道, 因而 802.11η中最多可绑定 两个 20MHz的信道, 以形成 40MHz的信道资源。 由于 WiFi的 5GHz频率上 可以利用的信道数量较多, 因而 IEEE通过工作在 5GHz频带上的 802.11ac 来进一步地优化了 802.11n, 即将信道绑定从 802.11η标准中的 20MHz 和 40MHz提高到 80MHz, 甚至是 160MHz, 这使得可用频谱越来越宽、 可用的 信道也越来越多。
现有技术中, 802.11ac 中定义了基于信道绑定技术的增强请求发送 (Request To Send, 以下简称 RTS) 和允许发送 (Clear To Send, 以下简称 CTS ) 协议, 具有以下两方面特点: 一方面, 在传输数据时必须选择包含主 信道在内的 20MHz、 40MHz, 80MHz或 160MHz几种固定的带宽; 另一方 面, 无论选择的传输带宽有多大, 整个带宽仅能作为一个通道用来传输一个 数据。 具体为: 发送端在可用的带宽内 (假设可用带宽为 80MHz, 包括 4个 绑定的 20MHz的信道) 将 RTS帧以 20MHz为单位的方式复制 3次后充满 80MHz, 在该 80MHz带宽上发送, 即同时在 4个 20MHz的信道上发送 4个 RTS帧; 之后, 接收端检测其可用的信道和带宽, 如果可用带宽的一部分正 在被使用, 那么接收端只在未被使用的另一部分可用带宽上回复 CTS帧给发 送端, 并在 CTS 帧中报告接收端当前可用的带宽 (如当前可用的带宽为 40MHz, 该 40MHz必须包含主信道) ; 发送端在这 40MHz上发送一个数据, 使得接收端在相应的信道上回复块确认 (Block ACK, 以下简称 BA) 帧, 以 使发送端确认该数据是否传输成功。
但是, 现有技术虽然缩短了数据的传输时间, 但是无法提升数据传输的 鲁棒性, 并且在传输数据时必须选择包含主信道在内的几种固定的带宽, 因 此限制了信道使用的灵活性。
发明内容
本发明提供一种数据传输方法和通信设备, 用以解决现有技术中数据传 输鲁棒性低, 并且信道使用不够灵活的技术问题。
第一方面, 本发明提供一种通信设备, 包括:
确定模块, 用于执行确定操作, 以确定第一空闲信道的个数; 发送模块, 用于在每个所述第一空闲信道上向接收端发送数据; 判断模块, 用于判断是否重新发送所述数据; 若是, 则指示所述确定 模块继续执行所述确定操作, 直至判断所述发送模块不需要重新发送所述 数据为止; 若否, 则指示所述发送模块不再发送所述数据。
结合第一方面,在第一方面的第一种可能的实施方式中,所述确定模块, 具体用于确定所述通信设备当前能够接入的第二空闲信道; 并根据所述第 二空闲信道, 确定所述发送模块发送数据的所述第一空闲信道的个数。
结合第一方面的第一种可能的实施方式, 在第一方面的第二种可能的实 施方式中, 所述发送模块, 具体用于在每个所述第一空闲信道上采用相同 或不同的冗余版本向所述接收端发送所述数据, 以使所述接收端对所述数 据进行解码。
结合第一方面的第一种可能的实施方式, 在第一方面的第三种可能的实 施方式中, 所述确定模块, 具体用于若所述第二空闲信道的个数等于 1, 则确定所述第一空闲信道的个数等于 1 ; 若所述第二空闲信道的个数大于 1, 则确定所述第一空闲信道的个数大于等于 1, 并小于等于所述第二空闲 信道的个数。
结合第一方面的第一种可能的实施方式, 在第一方面的第四种可能的实 施方式中, 所述判断模块, 还用于判断所述发送模块当前发送所述数据是 否为首次传输; 若是, 则所述确定模块确定所述第一空闲信道的个数等于 1 ; 若否, 则所述确定模块确定所述第一空闲信道的个数大于等于 1, 并小 于等于所述第二空闲信道的个数。
结合第一方面,在第一方面的第五种可能的实施方式中,所述发送模块, 具体用于采用单播的方式在所述第一空闲信道上向所述接收端发送所述 数据; 则所述判断模块, 具体用于判断所述数据是否传输成功; 若是, 则 指示所述发送模块不再发送所述数据; 若否, 则判断所述数据的累计发送 次数是否超过预设的传输总次数; 若是, 则指示所述发送模块不再发送所 述数据; 若否, 则指示所述确定模块继续执行所述确定操作, 直至判断所 述发送模块不需要重新发送所述数据为止。
结合第一方面,在第一方面的第六种可能的实施方式中,所述发送模块, 具体用于采用多播的方式在所述第一空闲信道上向所述接收端发送所述 数据; 则所述判断模块, 具体用于判断所述数据的累计发送次数是否超过 预设的传输总次数; 若是, 则指示所述发送模块不再发送所述数据; 若否, 则指示所述确定模块继续执行所述确定操作, 直至判断所述发送模块不需 要重新发送所述数据为止。
结合第一方面,在第一方面的第七种可能的实施方式中,所述发送模块, 具体用于采用组播的方式在所述第一空闲信道上向所述接收端发送所述 数据, 其中, 所述数据为一组数据; 并在所述第一空闲信道上采用单播的 方式向所述接收端发送块确认请求 BAR帧, 以使所述接收端根据所述 BAR 帧向所述发送端发送块确认 BA帧。
结合第一方面的第七种可能的实施方式, 在第一方面的第八种可能的实 施方式中,所述判断模块, 具体用于根据所述 BA帧判断所述数据是否全部 传输成功; 若所述数据全部传输成功, 则指示所述发送模块不再发送所述 数据; 若所述数据部分传输成功, 则指示所述确定模块继续执行所述确定 操作, 直至判断所述发送模块不需要重新发送所述数据中的传输失败的数 据为止。
结合第一方面的第一种可能的实施方式至第一方面的第八种可能的实施 方式中的任一项, 在第一方面的第九种可能的实施方式中, 所述确定模块, 具体用于采用请求发送-允许发送 RTS-CTS握手的方式确定所述第二空闲 信道。
第二方面, 本发明提供一种数据传输方法, 包括:
发送端执行确定操作, 以确定第一空闲信道的个数;
所述发送端在每个所述第一空闲信道上向接收端发送数据;
所述发送端判断是否重新发送所述数据; 若是, 则所述发送端继续执 行所述确定操作, 直至所述发送端判断不需要重新发送所述数据为止; 若 否, 则所述发送端不再发送所述数据。
结合第二方面, 在第二方面的第一种可能的实施方式中, 所述发送端 执行确定操作, 以确定第一空闲信道的个数, 包括:
所述发送端确定自身当前能够接入的第二空闲信道;
所述发送端根据所述第二空闲信道, 确定所述发送端发送数据的所述 第一空闲信道的个数。
结合第二方面的第一种可能的实施方式, 在第二方面的第二种可能的 实施方式中, 所述发送端在每个所述第一空闲信道上向所述接收端发送所 述数据, 包括:
所述发送端在每个所述第一空闲信道上采用相同或不同的冗余版本 向所述接收端发送所述数据, 以使所述接收端对所述数据进行解码。
结合第二方面的第一种可能的实施方式, 在第二方面的第三种可能的 实施方式中, 所述发送端根据所述第二空闲信道, 确定所述发送端发送数 据的所述第一空闲信道的个数, 包括:
若所述第二空闲信道的个数等于 1, 则所述发送端确定所述第一空闲 信道的个数等于 1 ;
若所述第二空闲信道的个数大于 1, 则所述发送端确定所述第一空闲 信道的个数大于等于 1, 并小于等于所述第二空闲信道的个数。 结合第二方面的第一种可能的实施方式, 在第二方面的第四种可能的 实施方式中, 所述发送端根据所述第二空闲信道, 确定所述发送端发送数 据的所述第一空闲信道的个数, 包括:
所述发送端判断当前发送所述数据是否为首次传输;
若是, 则所述发送端确定所述第一空闲信道的个数等于 1 ;
若否, 则所述发送端确定所述第一空闲信道的个数大于等于 1, 并小 于等于所述第二空闲信道的个数。
结合第二方面, 在第二方面的第五种可能的实施方式中, 所述发送端 在所述第一空闲信道上向所述接收端发送所述数据, 包括: 所述发送端采 用单播的方式在所述第一空闲信道上向所述接收端发送所述数据;
则所述发送端判断是否重新发送所述数据, 包括:
所述发送端判断所述数据是否传输成功;
若是, 则所述发送端不再发送所述数据;
若否, 则所述发送端判断所述数据的累计发送次数是否超过预设的传 输总次数; 若是, 则所述发送端不再发送所述数据; 若否, 则所述发送端 继续执行所述确定操作, 直至所述发送端判断不需要重新发送所述数据为 止。
结合第二方面, 在第二方面的第六种可能的实施方式中, 所述发送端 在所述第一空闲信道上向所述接收端发送所述数据, 包括: 所述发送端采 用多播的方式在所述第一空闲信道上向所述接收端发送所述数据;
则所述发送端判断是否重新发送所述数据, 包括:
所述发送端判断所述数据的累计发送次数是否超过预设的传输总次 数; 若是, 则所述发送端不再发送所述数据; 若否, 则所述发送端继续执 行所述确定操作, 直至所述发送端判断不需要重新发送所述数据为止。
结合第二方面, 在第二方面的第七种可能的实施方式中, 所述发送端 在所述第一空闲信道上向所述接收端发送所述数据, 包括:
所述发送端采用组播的方式在所述第一空闲信道上向所述接收端发 送所述数据, 其中, 所述数据为一组数据;
所述发送端在所述第一空闲信道上采用单播的方式向所述接收端发 送块确认请求 BAR帧, 以使所述接收端根据所述 BAR帧向所述发送端发送 块确认 BA帧。
结合第二方面的第七种可能的实施方式, 在第二方面的第八种可能的 实施方式中, 所述发送端判断是否重新发送所述数据, 包括:
所述发送端根据所述 BA帧判断所述数据是否全部传输成功; 若所述数据全部传输成功, 则所述发送端不再发送所述数据; 若所述数据部分传输成功, 则所述发送端继续执行所述确定操作, 直 至所述发送端判断不需要重新发送所述数据中的传输失败的数据为止。
结合第二方面的第一种可能的实施方式至第二方面的第八种可能的 实施方式中的任一项, 在第二方面的第九种可能的实施方式中, 所述发送 端确定所述自身当前能够接入的第二空闲信道, 包括:
所述发送端采用请求发送-允许发送 RTS-CTS握手的方式确定所述第 二空闲信道。
本发明提供的数据传输方法和通信设备, 通过发送端确定第一空闲信 道的个数, 使得发送端在每个第一空闲信道上向接收端发送数据, 并判断 该数据是否需要重新发送给接收端, 以确保数据的正确传输。 本发明提供 的数据传输方法, 提高了数据的传输鲁棒性, 并且提高了信道的利用率和 灵活性。 附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案, 下面将对 实施例或现有技术描述中所需要使用的附图作一简单地介绍, 显而易见 地, 下面描述中的附图是本发明的一些实施例, 对于本领域普通技术人员 来讲, 在不付出创造性劳动的前提下, 还可以根据这些附图获得其他的附 图。
图 1为本发明提供的通信设备实施例一的结构示意图;
图 2为本发明提供的数据传输接入时序示意图一;
图 3为本发明提供的数据传输接入时序示意图二;
图 4为本发明提供的数据传输接入时序示意图三;
图 5为本发明提供的数据传输接入时序示意图四;
图 6为本发明提供的数据传输接入时序示意图五; 图 7为本发明提供的数据传输接入时序示意图六;
图 8为本发明提供的数据传输接入时序示意图七;
图 9为本发明提供的通信设备实施例二的结构示意图;
图 10为本发明提供的数据传输方法实施例一的流程示意图。 具体实施方式
为使本发明实施例的目的、 技术方案和优点更加清楚, 下面将结合本 发明实施例中的附图, 对本发明实施例中的技术方案进行清楚、 完整地描 述, 显然,所描述的实施例是本发明一部分实施例, 而不是全部的实施例。 基于本发明中的实施例, 本领域普通技术人员在没有作出创造性劳动前提 下所获得的所有其他实施例, 都属于本发明保护的范围。
本发明实施例涉及的通信设备,可以是用户设备,还可以是基站设备, 还可以是无线接入点, 本发明实施例对此并不做限制。
本发明实施例涉及的终端, 可以是无线终端也可以是有线终端。 无线 终端可以是指向用户提供语音和 /或数据连通性的设备, 具有无线连接功 能的手持式设备、 或连接到无线调制解调器的其他处理设备。 无线终端可 以经无线接入网 (例如, RAN, Radio Access Network ) 与一个或多个核 心网进行通信, 无线终端可以是移动终端, 如移动电话 (或称为 "蜂窝" 电话)和具有移动终端的计算机, 例如, 可以是便携式、 袖珍式、 手持式、 计算机内置的或者车载的移动装置, 它们与无线接入网交换语言和 /或数 据。 例如, 个人通信业务 (PCS , Personal Communication Service ) 电 话、 无绳电话、会话发起协议(SIP )话机、 无线本地环路(WLL, Wireless Local Loop ) 站、 个人数字助理 (PDA , Personal Digital Assi stant ) 等设备。 无线终端也可以称为系统、 订户单元 (Subscriber Unit ) 、 订 户站(Subscriber Stat ion ),移动站(Mobi le Station )、移动台(Mobi le )、 远程站 (Remote Stat ion ) 、 远程终端 (Remote Terminal ) 、 接入终端 (Access Terminal )、用户终端 (User Terminal )、用户代理 ( User Agent )、 用户设备 (User Device ) 、 或用户装备 (User Equipment ) 。
本申请中涉及的基站, 可以是 WLAN 的接入点 (Access Point ) , 还 可以是指接入网中在空中接口上通过一个或多个扇区与无线终端通信的 设备。 若该通信设备为用户设备, 则与该通信设备进行数据传输的接收端 可以为基站设备或无线接入点; 若该通信设备为基站设备或无线接入点, 则与该通信设备进行数据传输的接收端可以为用户设备。 另外, 本发明实 施例涉及的通信设备可以适用于无线局域网 (Wireless Local Area Networks , 以下简称 WLAN) 中数据传输的场景, 且该通信设备具备感知多 个信道的忙闲状态以及可以在多个信道上并行发送或接收数据的能力。 本 发明实施例以 WLAN中的数据传输为例来说明。
图 1为本发明提供的通信设备实施例一的结构示意图。 如图 1所示, 该通信设备包括: 处理器 10和发送器 11.其中, 处理器 10, 用于执行确 定操作, 以确定第一空闲信道的个数; 发送器 11, 用于在每个第一空闲信 道上向接收端发送数据; 处理器 10, 还用于判断是否重新发送所述数据; 若是, 则处理器 10继续执行上述确定操作, 直至判断发送器 11不需要重 新发送所述数据为止; 若否, 则指示发送器 11不再发送所述数据。
具体的, 处理器 10预先与接收端约定未来传输数据时可能需要的可 用信道, 这里的可用信道可以是 WLAN系统中的所有信道 (每个信道的带 宽为 20MHz ), 还可以为处理器 10与接收端通过某种约定方式确定下来的 两个或两个以上的可用信道。
处理器 10执行确定操作, 以在上述可用信道上确定第一空闲信道的 个数, 这里的第一空闲信道可以是处理器 10通过竞争等操作确定的未来 在发送数据时不会和其他通信设备发生冲突的空闲信道。上述确定的第一 空闲信道可以包括主信道, 也可以不包括主信道; 这里的第一空闲信道的 个数可以是一个, 也可以是多个。 若是多个第一空闲信道, 则这多个第一 空闲信道可以不是连续的, 即本发明实施例对第一空闲信道不做限制, 可 以提高信道的利用率和灵活性。
之后, 处理器 10指示发送器 11在上述确定的每个第一空闲信道上向 接收端发送数据, 以使接收端对该数据进行相应的解码。 并且, 处理器 10 还可以累计该数据的发送次数, 若是在一个第一空闲信道发送该数据, 则 表明数据发送了 1次, 若是在多个第一空闲信道上发送该数据, 则表明数 据发送了多次。
但是, 发送器 11 发送给接收端的数据是否成功传输或者接收端对接 收到的数据能否正确解码, 关系到处理器 10需不需要指示发送器 11对该 数据进行重新发送。 因此, 为了确保数据的成功传输, 处理器 10还需要 判断是否需要重新发送上述数据。 可选的, 当发送器 11 发送给接收端的 数据传输成功时, 处理器 10可以判断不需要发送器 11重新发送数据; 若 发送器 11发送给接收端的数据传输失败时, 处理器 10判断发送器 11可 能需要重新发送数据。 若处理器 10确定发送器 11需要重新发送上述数据 时, 则处理器 10会返回重新执行确定操作, 以重新确定第一空闲信道的 个数, 并指示发送器 11 重新在每个第一空闲信道上给接收端发送上述数 据, 直至处理器 10判断发送器 11不再需要重新发送上述数据为止。 若处 理器 10确定发送器 11不需要重新发送上述数据时, 则处理器 10指示发 送器 11不再向接收端发送上述数据。
本发明实施例提供的通信设备, 通过处理器确定第一空闲信道的个 数, 使得发送器在确定的每个第一空闲信道上向接收端发送数据, 并且处 理器还判断该数据是否需要重新发送给接收端, 以确保数据的正确传输。 本发明实施例提供的通信设备, 使得数据可以同时在多个第一空闲信道上 传输, 并且在数据需要重新发送时也可以选择多个第一空闲信道来发送, 提高了数据的传输鲁棒性; 并且, 本发明实施例中的多个第一空闲信道可 以不包括主信道, 也可以不是连续的信道, 因而提高了信道的利用率和灵 活性。
进一步地, 上述发送器 11可以采用相同或不同的冗余版本在每个第 一空闲信道上向接收端发送所述数据。接收端可以同时在对应的多个第一 空闲信道上并行接收数据。 gp,发送端在哪一个第一空闲信道上发送数据, 接收端就在该信道上接收该数据, 当然, 接收端还具有在其他信道上接收 其他通信设备发送的数据的能力。
接收端可以对来自不同第一空闲信道上的同一数据进行单独解码, 也 可以将多个第一空闲信道上的数据合并进行联合解码, 以降低接收端的误 包率。当多个第一空闲信道上的数据均采用相同冗余版本时, 可借鉴 HARQ 中的跟踪合并作为联合解码的方式, 即接收端采用最大比合并原则对接收 到的数据进行合并。 当多个第一空闲信道上的数据分别采用不同冗余版本 时, 可借鉴 HARQ中的增量冗余作为联合解码的方式, 即接收端对来自不 同信道上冗余版本不同的数据进行合并, 由于不同冗余版本的数据之间可 能包含对方没有的额外校验比特, 因而合并后的码字具有更强的纠错能 力。
在上述实施例的基础上, 作为本发明实施例的第一种可能的实施方 式, 本实施例涉及的是发送器 11 采用单播的方式向接收端发送数据时, 处理器 11确定第一空闲信道个数以及判断发送器 11是否需要重新发送上 述数据的具体过程。进一步地, 上述处理器 10, 具体用于确定上述通信设 备当前能够接入的第二空闲信道; 并根据该第二空闲信道, 确定发送器 11 发送数据的第一空闲信道的个数。 若第二空闲信道的个数等于 1, 则处理 器 10确定第一空闲信道的个数等于 1 ; 若第二空闲信道的个数大于 1, 则 处理器 10确定第一空闲信道的个数大于等于 1,并小于等于第二空闲信道 的个数。
具体的, 当发送器 11 采用单播的方式在每个第一空闲信道上采用相 同或不同冗余版本向接收端发送数据时, 处理器 10执行并行侦听退避, 当退避过程结束之后, 检测到有至少一个第二空闲信道。 若第二空闲信道 的个数 (k ) 等于 1, 则处理器 10确定第一空闲信道的个数等于 1 ; 若第 二空闲信道的个数 (k ) 大于 1, 则处理器 10确定第一空闲信道的个数大 于等于 1, 并小于等于第二空闲信道的个数。
在不超过传输总次数限制的情况下, 处理器 10在上述至少一个第二 空闲信道中选择第一空闲信道, 并指示发送器在每个第一空闲信道上发送 数据。若此时第二空闲信道个数大于 1, 则处理器 10在第二空闲信道中选 取至少一个第一空闲信道, 即第一空闲信道的个数大于等于 1, 并小于等 于第二空闲信道的个数。 例如, 参照图 2, 图 2中选取 2个第一空闲信道, 即信道 1与信道 2,发送器 11在信道 1和信道 2上分别以相同或不同的冗 余版本并行发送同一个数据。 若第二空闲信道个数等于 1, 则处理器 10 仅选取 1个空闲信道, 参见图 3中的信道 1, 发送器 11在信道 1上发送一 个数据, 并且该数据在重新发送时, 处理器 10 选择的多个第一空闲信道 (也可以选择一个第一空闲信道) 。
处理器 10判断上述数据是否传输成功(处理器 10可以有自己的判断 机制, 还可以接收端的 ACK响应来判断) ; 若是, 则指示发送器 11不再 发送该数据; 若否, 则判断该数据的累计发送次数是否超过预设的传输总 次数; 若超过传输总次数, 则指示发送器 11 不再发送该数据; 若未超过 传输总次数, 则处理器 10继续执行上述确定操作, 直至判断发送器 11不 需要重新发送所述数据为止。 gp, 处理器 10重新确定第一空闲信道的个 数 (图 3中重传时确定第二空闲信道的个数大于 1, 则确定的第一空闲信 道的个数是 2个) , 并指示发送器 11重新发送该数据; 并重新判断该数 据是否传输成功; 如果传输成功, 则指示发送器 11 不再发送该数据; 若 传输不成功, 则继续判断该数据的累计发送次数是否超过传输总次数, 直 到处理器 10 确定该数据的累计发送次数达到传输总次数时, 指示发送器 11不再发送该数据为止。
本发明实施例提供的通信设备, 通过处理器确定通信设备当前能够接 入的第二空闲信道, 并根据第二空闲信道确定第一空闲信道的个数, 使得 发送器在确定的每个第一空闲信道上向接收端发送数据, 并且处理器还判 断该数据是否需要重新发送给接收端, 以确保数据的正确传输。 本发明实 施例提供的通信设备, 使得数据可以同时在多个第一空闲信道上传输, 并 且在数据需要重新发送时也可以选择多个第一空闲信道来发送, 提高了数 据的传输鲁棒性; 并且, 本发明实施例中的多个第一空闲信道可以不包括 主信道, 也可以不是连续的信道, 因而提高了信道的利用率和灵活性。 在上述实施例的基础上, 作为本发明实施例的第二种可能的实施方 式, 本实施例涉及的是发送器 11采用单播的方式向接收端发送数据时, 处理器 11确定第一空闲信道个数以及判断发送器 11是否需要重新发送上 述数据的另一具体过程。 进一步地, 上述处理器 10, 具体用于确定上述通 信设备当前能够接入的第二空闲信道; 并根据该第二空闲信道, 确定发送 器 11发送数据的第一空闲信道的个数。 所述处理器 10, 具体用于判断发 送器 11当前发送所述数据是否为首次传输; 若是, 则确定第一空闲信道 的个数等于 1 ; 若否, 则确定第一空闲信道的个数大于等于 1, 并小于等 于第二空闲信道的个数。
具体的, 当发送器 11采用单播的方式在每个第一空闲信道上采用相 同或不同冗余版本向接收端发送数据时, 处理器 10执行并行侦听退避, 当退避过程结束之后, 检测到有至少一个第二空闲信道。 处理器 10判断 发送器 11当前发送该数据是否为首次传输, 若是, 则处理器 10确定第一 空闲信道的个数等于 1 ; 若否, 则处理器 10确定第一空闲信道的个数大于 等于 1, 并小于等于第二空闲信道的个数; gp, 若发送器 11当前是重新发 送数据 (即数据的重传) , 则处理器 10会选择 1个或多个第一空闲信道 供发送器 11使用, 图 4中示出的是发送器 11在首次传输时选择一个第一 空闲信道, 在重新发送该数据时选择的是多个第一空闲信道的例子。
假设当前发送器 11是首次向接收端发送数据, 则处理器 10在上述至 少一个第二空闲信道中选择 1个第一空闲信道, 并指示发送器在该第一空 闲信道上发送数据。 并且, 处理器 10判断该数据是否传输成功; 若是, 则指示发送器 11 不再发送该数据; 若否, 则判断该数据的累计发送次数 是否超过预设的传输总次数; 若超过传输总次数, 则指示发送器 11 不再 发送该数据; 若未超过传输总次数, 则处理器 10继续执行上述确定操作, 直至判断发送器 11不需要重新发送所述数据为止。 gp, 处理器 10重新判 断发送器 11当前是否为首次传输 (当然, 处理器 10重新执行确定操作, 意味着发送器 11第一次发送的数据传输失败, 则发送器 11此时已经不是 首次传输了) , 重新确定第一空闲信道的个数 (此时确定的第一空闲信道 的个数可以是一个, 也可以是多个) , 并指示发送器 11重新发送该数据; 并重新判断该数据是否传输成功; 如果传输成功, 则指示发送器 11 不再 发送该数据; 若传输不成功, 则继续判断该数据的累计发送次数是否超过 传输总次数, 直到处理器 10确定该数据的累计发送次数达到传输总次数 时, 指示发送器 11不再发送该数据为止。
本发明实施例提供的通信设备, 通过处理器确定通信设备当前能够接 入的第二空闲信道, 并判断发送器当前发送数据是否为首次传输, 在第二 空闲信道中确定第一空闲信道的个数, 使得发送器在确定的每个第一空闲 信道上向接收端发送数据, 并且处理器还判断该数据是否需要重新发送给 接收端, 以确保数据的正确传输。 本发明实施例提供的通信设备, 使得数 据可以同时在多个第一空闲信道上传输, 并且在数据需要重新发送时也可 以选择多个第一空闲信道来发送, 提高了数据的传输鲁棒性; 并且, 本发 明实施例中的多个第一空闲信道可以不包括主信道, 也可以不是连续的信 道, 因而提高了信道的利用率和灵活性。 在上述实施例的基础上, 作为本发明实施例的第三种可能的实施方 式, 本实施例涉及的是发送器 11 采用多播的方式向接收端发送数据时, 处理器 11确定第一空闲信道个数以及判断发送器 11是否需要重新发送上 述数据的具体过程。进一步地, 上述处理器 10, 具体用于确定上述通信设 备当前能够接入的第二空闲信道; 并根据该第二空闲信道, 确定发送器 11 发送数据的第一空闲信道的个数。 若第二空闲信道的个数等于 1, 则处理 器 10确定第一空闲信道的个数等于 1 ; 若第二空闲信道的个数大于 1, 则 处理器 10确定第一空闲信道的个数大于等于 1,并小于等于第二空闲信道 的个数。
具体的, 当发送器 11 采用多播的方式在每个第一空闲信道上采用相 同或不同冗余版本向接收端发送数据时, 处理器 10执行并行侦听退避, 当退避过程结束之后, 检测到有至少一个第二空闲信道。 若第二空闲信道 的个数等于 1, 则处理器 10确定第一空闲信道的个数等于 1 ; 若第二空闲 信道的个数大于 1, 则处理器 10确定第一空闲信道的个数大于等于 1, 并 小于等于第二空闲信道的个数。
在本实施例中, 处理器 10不用判断该数据是否传输成功, 只需要直 接判断该数据的累计发送次数是否超过预设的传输总次数; 若该数据的累 计发送次数超过传输总次数,则处理器 10指示发送器 11不再发送该数据; 若未超过传输总次数, 则处理器 10 继续执行上述确定操作, 直至判断发 送器 11不需要重新发送所述数据为止。 gp, 处理器 10重新确定第一空闲 信道的个数(参见图 5和图 6 ) , 并指示发送器 11重新发送该数据; 并判 断该数据的累计发送次数是否超过传输总次数, 直到处理器 10确定该数 据的累计发送次数达到传输总次数时, 指示发送器 11 不再发送该数据为 止。 其中, 图 5所示的例子是处理器 10在数据在首次传输时选择 2个第 一空闲信道(处理器 10确定的第二空闲信道的个数 k大于 1, 则确定的第 一空闲信道的个数为 2个, 即信道 1和信道 2 ) , 在发送器 11再次发送该 数据 (后续传输阶段) 时, 处理器 10 重新确定的第一空闲信道的个数也 是 2个(因为处理器 10重新确定的第二空闲信道的个数 k大于 1 ) , 即信 道 1和信道 3 ; 图 6所示的例子是处理器 10在数据在首次传输时选择 1 个第一空闲信道(因为第二空闲信道的个数 k=l ) , 在发送器 11再次发送 该数据 (后续传输阶段) 时, 处理器 10选择的是 3个空闲信道 (信道 1、 信道 2和信道 3 ) , 因为处理器 10在发送器 11再次发送该数据时确定的 第二空闲信道的个数 k大于 1。
本发明实施例提供的通信设备, 通过处理器确定通信设备当前能够接 入的第二空闲信道, 并根据第二空闲信道确定第一空闲信道的个数, 使得 发送器在确定的每个第一空闲信道上向接收端发送数据, 并且处理器还判 断该数据是否需要重新发送给接收端, 以确保数据的正确传输。 本发明实 施例提供的通信设备, 使得数据可以同时在多个第一空闲信道上传输, 并 且在数据需要重新发送时也可以选择多个第一空闲信道来发送, 提高了数 据的传输鲁棒性; 并且, 本发明实施例中的多个第一空闲信道可以不包括 主信道, 也可以不是连续的信道, 因而提高了信道的利用率和灵活性。 在上述实施例的基础上, 作为本发明实施例的第四种可能的实施方 式, 本实施例涉及的是发送器 11 采用组播的方式向接收端发送一组数据 时, 处理器 11确定第一空闲信道个数以及判断发送器 11是否需要重新发 送上述数据的具体过程。 进一步地, 上述处理器 10, 具体用于确定上述通 信设备当前能够接入的第二空闲信道; 并根据该第二空闲信道, 确定发送 器 11发送数据的第一空闲信道的个数。若第二空闲信道的个数等于 1, 则 处理器 10确定第一空闲信道的个数等于 1 ;若第二空闲信道的个数大于 1, 则处理器 10确定第一空闲信道的个数大于等于 1,并小于等于第二空闲信 道的个数。
具体的, 当发送器 11 采用组播的方式在每个第一空闲信道上采用相 同或不同冗余版本向多个接收端发送一组数据时, 处理器 10 执行并行侦 听退避, 当退避过程结束之后, 检测到有至少一个第二空闲信道。 若第二 空闲信道的个数等于 1, 则处理器 10确定第一空闲信道的个数等于 1 ; 若 第二空闲信道的个数大于 1,则处理器 10确定第一空闲信道的个数大于等 于 1, 并小于等于第二空闲信道的个数。 图 7中示出的是当第二空闲信道 的个数大于 1时, 在发送器 11首次发送数据时, 处理器 10选择 2个第一 空闲信道 (信道 1和信道 3 ) , 并在信道 1和信道 3上分别以相同或不同 的冗余版本连续并行发送同一组数据,包括数据(Data) l、Data2和 Data3。
发送器 11在上述选择的第一空闲信道(例如图 7中的信道 1和信道 3 ) 上分别给所有的接收端以单播形式发送 BAR帧, 以使各个接收端向该通信 设备回复 BA帧。 处理器 10根据所回复的多个 BA帧, 判断该组内的数据 是否全部传输成功。 若该组内的数据全部传输成功, 则处理器 10指示发 送器 11不再发送该组数据; 若该组内的数据部分传输成功, 则处理器 10 继续执行上述确定操作, 直至判断发送器 11 不需要重新发送该组内的数 据中的传输失败的数据为止。 图 8中示出的是在发送器 11首次传输该组 数据时, 处理器 10选择了 1个第一空闲信道(信道 3 ) , 在该组数据中的 部分数据 (图 8中的 Data2 ) 传输失败时, 处理器 10为发送器 11重传这 些失败的数据选择了 2个第一空闲信道 (信道 2和信道 3 ) , 发送器 11 在信道 2和信道 3上传输 Data2, 并且还在这两个信道上传输 BAR帧。
可选的, 在上述所有可能的实施例方式中, 处理器 11 可以通过 RTS-CTS握手的方式确定通信设备当前能够接入的第二空闲信道。
本发明实施例提供的通信设备, 通过处理器确定通信设备当前能够接 入的第二空闲信道, 并根据第二空闲信道确定第一空闲信道的个数, 使得 发送器在确定的每个第一空闲信道上向接收端发送数据, 并且处理器还判 断该数据是否需要重新发送给接收端, 以确保数据的正确传输。 本发明实 施例提供的通信设备, 使得数据可以同时在多个第一空闲信道上传输, 并 且在数据需要重新发送时也可以选择多个第一空闲信道来发送, 提高了数 据的传输鲁棒性; 并且, 本发明实施例中的多个第一空闲信道可以不包括 主信道, 也可以不是连续的信道, 因而提高了信道的利用率和灵活性。 图 9为本发明提供的通信设备实施例二的结构示意图。 如图 9所示, 该通信设备包括: 确定模块 20、 发送模块 21和判断模块 22。 其中, 确定 模块 20, 用于执行确定操作, 以确定第一空闲信道的个数; 发送模块 21, 用于在每个第一空闲信道上向接收端发送数据; 判断模块 22, 还用于判断 是否重新发送所述数据; 若是, 则指示确定模块 20继续执行上述确定操 作, 直至判断发送模块 21不需要重新发送所述数据为止; 若否, 则指示 发送模块 21不再发送所述数据。
具体的, 通信设备预先与接收端约定未来传输数据时可能需要的可用 信道, 这里的可用信道可以是 WLAN系统中的所有信道 (每个信道的带宽 为 20MHz ) , 还可以为通信设备与接收端通过某种约定方式确定下来的两 个或两个以上的可用信道。
确定模块 20执行确定操作, 以在上述可用信道上确定第一空闲信道 的个数, 这里的第一空闲信道可以是确定模块 20通过竞争等操作确定的 未来在发送数据时不会和其他通信设备发生冲突的空闲信道。 上述确定的 第一空闲信道可以包括主信道, 也可以不包括主信道; 这里的第一空闲信 道的个数可以是一个, 也可以是多个。 若是多个第一空闲信道, 则这多个 第一空闲信道可以不是连续的, 即本发明实施例对第一空闲信道不做限 制, 可以提高信道的利用率和灵活性。
之后, 发送模块 21 在上述确定的每个第一空闲信道上向接收端发送 数据, 以使接收端对该数据进行相应的解码。 并且, 上述确定模块 20还 可以累计该数据的发送次数, 若是在一个第一空闲信道发送该数据, 则表 明数据发送了 1次, 若是在多个第一空闲信道上发送该数据, 则表明数据 发送了多次。
但是, 发送模块 21 发送给接收端的数据是否成功传输或者接收端对 接收到的数据能否正确解码, 关系到判断模块 22 需不需要指示发送模块 21 对该数据进行重新发送。 因此, 为了确保数据的成功传输, 判断模块 22还需要判断是否需要重新发送上述数据。 可选的, 当发送模块 21发送 给接收端的数据传输成功时, 判断模块 22可以判断不需要发送模块 21重 新发送数据; 若发送模块 21 发送给接收端的数据传输失败时, 判断模块 22判断发送模块 21可能需要重新发送数据。若判断模块 22判断发送模块 21需要重新发送上述数据时,则指示确定模块 20返回重新执行确定操作, 以重新确定第一空闲信道的个数, 并指示发送模块 21 重新在每个第一空 闲信道上给接收端发送上述数据, 直至判断模块 22判断发送模块 21不再 需要重新发送上述数据为止。若判断模块 22判断发送模块 21不需要重新 发送上述数据时, 则判断模块 22指示发送模块 21不再向接收端发送上述 数据。 本发明实施例提供的通信设备, 通过确定模块确定第一空闲信道的个 数, 使得发送模块在确定的每个第一空闲信道上向接收端发送数据, 并通 过判断模块判断该数据是否需要重新发送给接收端, 以确保数据的正确传 输。 本发明实施例提供的通信设备, 使得数据可以同时在多个第一空闲信 道上传输, 并且在数据需要重新发送时也可以选择多个第一空闲信道来发 送, 提高了数据的传输鲁棒性; 并且, 本发明实施例中的多个第一空闲信 道可以不包括主信道, 也可以不是连续的信道, 因而提高了信道的利用率 和灵活性。
进一步地, 上述发送模块 21可以采用相同或不同的冗余版本在每个 第一空闲信道上向接收端发送所述数据。接收端可以同时在对应的多个第 一空闲信道上并行接收数据。 gp, 发送端在哪一个第一空闲信道上发送数 据, 接收端就在该信道上接收该数据, 当然, 接收端还具有在其他信道上 接收其他通信设备发送的数据的能力。
接收端可以对来自不同第一空闲信道上的同一数据进行单独解码, 也 可以将多个第一空闲信道上的数据合并进行联合解码, 以降低接收端的误 包率。当多个第一空闲信道上的数据均采用相同冗余版本时, 可借鉴 HARQ 中的跟踪合并作为联合解码的方式, 即接收端采用最大比合并原则对接收 到的数据进行合并。 当多个第一空闲信道上的数据分别采用不同冗余版本 时, 可借鉴 HARQ中的增量冗余作为联合解码的方式, 即接收端对来自不 同信道上冗余版本不同的数据进行合并, 由于不同冗余版本的数据之间可 能包含对方没有的额外校验比特, 因而合并后的码字具有更强的纠错能 力。
在上述实施例的基础上, 作为本发明实施例的第一种可能的实施方 式, 本实施例涉及的是发送模块 21采用单播的方式向接收端发送数据时, 确定模块 20确定第一空闲信道个数以及判断模块 22判断发送模块 21是 否需要重新发送上述数据的具体过程。 进一步地, 上述确定模块 20, 具体 用于确定上述通信设备当前能够接入的第二空闲信道; 并根据该第二空闲 信道, 确定发送模块 21 发送数据的第一空闲信道的个数。 若第二空闲信 道的个数等于 1, 则确定模块 20确定第一空闲信道的个数等于 1 ; 若第二 空闲信道的个数大于 1,则确定模块 20确定第一空闲信道的个数大于等于 1, 并小于等于第二空闲信道的个数。
具体的, 当发送模块 21 采用单播的方式在每个第一空闲信道上采用 相同或不同冗余版本向接收端发送数据时, 通信设备执行并行侦听退避, 当退避过程结束之后, 检测到有至少一个第二空闲信道。 若第二空闲信道 的个数 (k ) 等于 1, 则确定模块 20确定第一空闲信道的个数等于 1 ; 若 第二空闲信道的个数 (k ) 大于 1, 则确定模块 20确定第一空闲信道的个 数大于等于 1, 并小于等于第二空闲信道的个数。
在不超过传输总次数限制的情况下, 确定模块 20在上述至少一个第 二空闲信道中选择第一空闲信道, 并指示发送模块 21 在每个第一空闲信 道上发送数据。若此时第二空闲信道个数大于 1, 则确定模块 20在第二空 闲信道中选取至少一个第一空闲信道,即第一空闲信道的个数大于等于 1, 并小于等于第二空闲信道的个数。 例如, 参照图 2, 图 2中选取 2个第一 空闲信道, 即信道 1与信道 2, 发送模块 21在信道 1和信道 2上分别以相 同或不同的冗余版本并行发送同一个数据。 若第二空闲信道个数等于 1, 则确定模块 20仅选取 1个空闲信道, 参见图 3中的信道 1, 发送模块 21 在信道 1上发送一个数据, 并且该数据在重新发送时确定模块 20选择多 个第一空闲信道 (也可以选择一个第一空闲信道) 。
判断模块 22判断上述数据是否传输成功(判断模块 22可以有自己的 判断机制, 还可以接收端的 ACK响应来判断) ; 若是, 则指示发送模块 21 不再发送该数据; 若否, 则判断该数据的累计发送次数是否超过预设的传 输总次数; 若超过传输总次数, 则指示发送模块 21 不再发送该数据; 若 未超过传输总次数, 则指示确定模块 20继续执行上述确定操作, 直至判 断发送模块 21不需要重新发送所述数据为止。 gp, 确定模块 20重新确定 第一空闲信道的个数 (图 3中重传时确定第二空闲信道的个数大于 1, 则 确定的第一空闲信道的个数是 2个) , 并指示发送模块 21重新发送该数 据; 并重新判断该数据是否传输成功; 如果传输成功, 则指示发送模块 21 不再发送该数据; 若传输不成功, 则继续判断该数据的累计发送次数是否 超过传输总次数, 直到判断模块 22 判断该数据的累计发送次数达到传输 总次数时, 指示发送模块 21不再发送该数据为止。
本发明实施例提供的通信设备, 通过确定模块确定通信设备当前能够 接入的第二空闲信道, 并根据第二空闲信道确定第一空闲信道的个数, 使 得发送模块在确定的每个第一空闲信道上向接收端发送数据, 并且通过判 断模块判断该数据是否需要重新发送给接收端, 以确保数据的正确传输。 本发明实施例提供的通信设备, 使得数据可以同时在多个第一空闲信道上 传输, 并且在数据需要重新发送时也可以选择多个第一空闲信道来发送, 提高了数据的传输鲁棒性; 并且, 本发明实施例中的多个第一空闲信道可 以不包括主信道, 也可以不是连续的信道, 因而提高了信道的利用率和灵 活性。 在上述实施例的基础上, 作为本发明实施例的第二种可能的实施方 式, 本实施例涉及的是发送模块 21采用单播的方式向接收端发送数据时, 确定模块 20确定第一空闲信道个数以及判断模块 22判断发送模块 21是 否需要重新发送上述数据的另一具体过程。 进一步地, 上述确定模块 20, 具体用于确定上述通信设备当前能够接入的第二空闲信道; 并根据该第二 空闲信道, 确定发送模块 21发送数据的第一空闲信道的个数。 上述判断 模块 22, 具体用于判断发送模块 21当前发送所述数据是否为首次传输; 若是, 则确定模块 20确定第一空闲信道的个数等于 1 ; 若否, 则确定模块 20确定第一空闲信道的个数大于等于 1,并小于等于第二空闲信道的个数。
具体的, 当发送模块 21采用单播的方式在每个第一空闲信道上采用 相同或不同冗余版本向接收端发送数据时, 通信设备执行并行侦听退避, 当退避过程结束之后, 检测到有至少一个第二空闲信道。 判断模块 22判 断发送模块 21当前发送该数据是否为首次传输, 若是, 则确定模块 20确 定第一空闲信道的个数等于 1 ; 若否, 则确定模块 20确定第一空闲信道的 个数大于等于 1, 并小于等于第二空闲信道的个数; SP , 若发送模块 21 当前是重新发送数据 (即数据的重传) , 则确定模块 20会选择 1个或多 个第一空闲信道供发送模块 21使用, 图 4中示出的是发送模块 21在首次 传输时选择一个第一空闲信道, 在重新发送该数据时选择的是多个第一空 闲信道的例子。
假设当前发送模块 21是首次向接收端发送数据, 则确定模块 20在上 述至少一个第二空闲信道中选择 1个第一空闲信道, 并指示发送模块在该 第一空闲信道上发送数据。 并且, 判断模块 22判断该数据是否传输成功; 若是, 则指示发送模块 21 不再发送该数据; 若否, 则判断该数据的累计 发送次数是否超过预设的传输总次数; 若超过传输总次数, 则指示发送模 块 21不再发送该数据; 若未超过传输总次数, 则指示确定模块 20继续执 行上述确定操作, 直至判断发送模块 21 不需要重新发送所述数据为止。 即, 判断模块 22重新判断发送模块 21当前是否为首次传输 (当然, 确定 模块 20重新执行确定操作, 意味着发送模块 21第一次发送的数据传输失 败, 则发送模块 21 此时已经不是首次传输了) , 重新确定第一空闲信道 的个数 (此时确定的第一空闲信道的个数可以是一个, 也可以是多个) , 并指示发送模块 21 重新发送该数据; 并重新判断该数据是否传输成功; 如果传输成功, 则指示发送模块 21 不再发送该数据; 若传输不成功, 则 继续判断该数据的累计发送次数是否超过传输总次数, 直到判断模块 22 判断该数据的累计发送次数达到传输总次数时, 指示发送模块 21 不再发 送该数据为止。
本发明实施例提供的通信设备, 通过确定模块确定通信设备当前能够 接入的第二空闲信道, 判断模块判断发送模块当前发送数据是否为首次传 输以在第二空闲信道中确定第一空闲信道的个数, 使得发送模块在确定的 每个第一空闲信道上向接收端发送数据, 并且判断模块还判断该数据是否 需要重新发送给接收端, 以确保数据的正确传输。 本发明实施例提供的通 信设备, 使得数据可以同时在多个第一空闲信道上传输, 并且在数据需要 重新发送时也可以选择多个第一空闲信道来发送, 提高了数据的传输鲁棒 性; 并且, 本发明实施例中的多个第一空闲信道可以不包括主信道, 也可 以不是连续的信道, 因而提高了信道的利用率和灵活性。 在上述实施例的基础上, 作为本发明实施例的第三种可能的实施方 式, 本实施例涉及的是发送模块 21采用多播的方式向接收端发送数据时, 确定模块 20确定第一空闲信道个数以及判断模块 22判断发送模块 21是 否需要重新发送上述数据的具体过程。 进一步地, 上述确定模块 20, 具体 用于确定上述通信设备当前能够接入的第二空闲信道; 并根据该第二空闲 信道, 确定发送模块 21发送数据的第一空闲信道的个数。 若第二空闲信 道的个数等于 1, 则确定第一空闲信道的个数等于 1 ; 若第二空闲信道的 个数大于 1, 则确定第一空闲信道的个数大于等于 1, 并小于等于第二空 闲信道的个数。
具体的, 当发送模块 21 采用多播的方式在每个第一空闲信道上采用 相同或不同冗余版本向接收端发送数据时, 通信设备执行并行侦听退避, 当退避过程结束之后, 检测到有至少一个第二空闲信道。 若第二空闲信道 的个数等于 1, 则确定模块 20确定第一空闲信道的个数等于 1 ; 若第二空 闲信道的个数大于 1,则确定模块 20确定第一空闲信道的个数大于等于 1, 并小于等于第二空闲信道的个数。
在本实施例中, 判断模块 22 不用判断该数据是否传输成功, 只需要 直接判断该数据的累计发送次数是否超过预设的传输总次数; 若该数据的 累计发送次数超过传输总次数, 则判断模块 22指示发送模块 21不再发送 该数据; 若未超过传输总次数, 则指示确定模块 20继续执行上述确定操 作, 直至判断发送模块 21 不需要重新发送所述数据为止。 SP , 判断模块 22指示确定模块 20重新确定第一空闲信道的个数 (参见图 5和图 6 ) , 并指示发送模块 21 重新发送该数据; 并判断该数据的累计发送次数是否 超过传输总次数, 直到判断模块 22 判断该数据的累计发送次数达到传输 总次数时, 指示发送模块 21不再发送该数据为止。 其中, 图 5所示的例 子是确定模块 20在数据在首次传输时选择 2个第一空闲信道 (确定模块 20确定的第二空闲信道的个数 k大于 1, 则确定的第一空闲信道的个数为 2个, 即信道 1和信道 2 ) , 在发送模块 21再次发送该数据 (后续传输阶 段) 时, 确定模块 20重新确定的第一空闲信道的个数也是 2个 (因为确 定模块 20重新确定的第二空闲信道的个数 k大于 1 ),即信道 1和信道 3 ; 图 6所示的例子是确定模块 20在数据在首次传输时选择 1个第一空闲信 道(因为第二空闲信道的个数 k=l ) , 在发送模块 21再次发送该数据 (后 续传输阶段) 时, 确定模块 20选择的是 3个空闲信道 (信道 1、 信道 2 和信道 3 ) , 因为确定模块 20在发送模块 21再次发送该数据时确定的第 二空闲信道的个数 k大于 1。
本发明实施例提供的通信设备, 通过确定模块确定通信设备当前能够 接入的第二空闲信道, 并根据第二空闲信道确定第一空闲信道的个数, 使 得发送模块在确定的每个第一空闲信道上向接收端发送数据, 并通过判断 模块判断该数据是否需要重新发送给接收端, 以确保数据的正确传输。 本 发明实施例提供的通信设备, 使得数据可以同时在多个第一空闲信道上传 输, 并且在数据需要重新发送时也可以选择多个第一空闲信道来发送, 提 高了数据的传输鲁棒性; 并且, 本发明实施例中的多个第一空闲信道可以 不包括主信道, 也可以不是连续的信道, 因而提高了信道的利用率和灵活 性。 在上述实施例的基础上, 作为本发明实施例的第四种可能的实施方 式, 本实施例涉及的是发送模块 21 采用组播的方式向接收端发送一组数 据时, 确定模块 20确定第一空闲信道个数以及判断模块 22判断发送模块 21是否需要重新发送上述数据的具体过程。 进一步地, 上述确定模块 20, 具体用于确定上述通信设备当前能够接入的第二空闲信道; 并根据该第二 空闲信道, 确定发送模块 21 发送数据的第一空闲信道的个数。 若第二空 闲信道的个数等于 1, 则确定模块 20确定第一空闲信道的个数等于 1 ; 若 第二空闲信道的个数大于 1,则确定模块 20确定第一空闲信道的个数大于 等于 1, 并小于等于第二空闲信道的个数。
具体的, 当发送模块 21 采用组播的方式在每个第一空闲信道上采用 相同或不同冗余版本向多个接收端发送一组数据时, 通信设备执行并行侦 听退避, 当退避过程结束之后, 检测到有至少一个第二空闲信道。 若第二 空闲信道的个数等于 1, 则确定模块 20确定第一空闲信道的个数等于 1 ; 若第二空闲信道的个数大于 1,则确定模块 20确定第一空闲信道的个数大 于等于 1, 并小于等于第二空闲信道的个数。 图 7中示出的是当第二空闲 信道的个数大于 1时, 在发送模块 21首次发送数据时, 确定模块 20选择 2个第一空闲信道 (信道 1和信道 3 ) , 并在信道 1和信道 3上分别以相 同或不同的冗余版本连续并行发送同一组数据 (包括 Datal、 Data2 和 Data3 ) 。
发送模块 21在上述选择的第一空闲信道 (例如图 7中的信道 1和信 道 3 ) 上分别给所有的接收端以单播形式发送 BAR帧, 以使各个接收端向 该通信设备回复 BA帧。 判断模块 22根据所回复的多个 BA帧, 判断该组 内的数据是否全部传输成功。 若该组内的数据全部传输成功, 则判断模块
22指示发送模块 21不再发送该组数据; 若该组内的数据部分传输成功, 则判断模块 22指示确定模块 22继续执行上述确定操作, 直至判断发送模 块 21不需要重新发送该组内的数据中的传输失败的数据为止。 图 8中示 出的是在发送模块 21首次传输该组数据时, 确定模块 20选择了 1个第一 空闲信道 (信道 3 ) , 在该组数据中的部分数据 (图 8中的 Data2 ) 传输 失败时, 确定模块 20为发送模块 21重传这些失败的数据选择了 2个第一 空闲信道(信道 2和信道 3 ),发送模块 21在信道 2和信道 3上传输 Data2, 并且还在这两个信道上传输 BAR帧。
可选的, 在上述所有可能的实施例方式中, 确定模块 20 可以通过
RTS-CTS握手的方式确定通信设备当前能够接入的第二空闲信道。
本发明实施例提供的通信设备, 通过确定模块确定通信设备当前能够 接入的第二空闲信道, 并根据第二空闲信道确定第一空闲信道的个数, 使 得发送模块在确定的每个第一空闲信道上向接收端发送数据, 并通过判断 模块判断该数据是否需要重新发送给接收端, 以确保数据的正确传输。 本 发明实施例提供的通信设备, 使得数据可以同时在多个第一空闲信道上传 输, 并且在数据需要重新发送时也可以选择多个第一空闲信道来发送, 提 高了数据的传输鲁棒性; 并且, 本发明实施例中的多个第一空闲信道可以 不包括主信道, 也可以不是连续的信道, 因而提高了信道的利用率和灵活 性。
图 10 为本发明提供的数据传输方法实施例一的流程示意图。 该方法 的执行主体为发送端, 该发送端可以为上述实施例中的通信设备。如图 10 所示, 该方法包括:
S 101 : 发送端执行确定操作, 以确定第一空闲信道的个数。
S 102 : 发送端在每个第一空闲信道上向接收端发送数据。
S 103 : 发送端判断是否重新发送上述数据; 若是, 则发送端继续执行 上述确定操作, 直至发送端判断不需要重新发送上述数据为止; 若否, 则 发送端不再发送上述数据。
本发明实施例提供的数据传输方法, 可以参照上述通信设备的实施 例, 其实现原理和技术效果类似, 在此不再赘述。 进一步地, 上述 S 101 , 具体可以为: 发送端确定自身当前能够接入的 第二空闲信道, 并根据所述第二空闲信道, 确定所述发送端发送数据的所 述第一空闲信道的个数。 可选的, 发送端可以采用 RTS-CTS握手的方式确 定所述第二空闲信道。
进一步地, 上述 S 102 , 具体可以为: 发送端在每个所述第一空闲信道 上采用相同或不同的冗余版本向所述接收端发送所述数据, 以使所述接收 端对所述数据进行解码。
本发明实施例提供的数据传输方法, 可以参照上述通信设备的实施 例, 其实现原理和技术效果类似, 在此不再赘述。
可选的, 上述 S 101可以包括: 若所述第二空闲信道的个数等于 1, 则 所述发送端确定所述第一空闲信道的个数等于 1 ; 若所述第二空闲信道的 个数大于 1, 则所述发送端确定所述第一空闲信道的个数大于等于 1, 并 小于等于第二空闲信道的个数。
可选的, 上述 S 101还可以包括: 所述发送端判断当前发送所述数据 是否为首次传输; 若是, 则所述发送端确定所述第一空闲信道的个数等于 1 ; 若否, 则所述发送端确定所述第一空闲信道的个数大于等于 1, 并小于 等于第二空闲信道的个数。
当发送端采用单播的方式在所述第一空闲信道上向所述接收端发送 所述数据时, 上述 S 103具体包括: 所述发送端判断所述数据是否传输成 功; 若是, 则所述发送端不再发送所述数据; 若否, 则所述发送端判断所 述数据的累计发送次数是否超过预设的传输总次数; 若是, 则所述发送端 不再发送所述数据; 若否, 则所述发送端继续执行所述确定操作, 直至所 述发送端判断不需要重新发送所述数据为止。
当发送端采用多播的方式在所述第一空闲信道上向所述接收端发送 所述数据时, 上述 S 103具体包括: 所述发送端判断所述数据的累计发送 次数是否超过预设的传输总次数;若是,则所述发送端不再发送所述数据; 若否, 则所述发送端继续执行所述确定操作, 直至所述发送端判断不需要 重新发送所述数据为止。
当所述发送端采用组播的方式在所述第一空闲信道上向所述接收端 发送所述数据 (该数据为一组数据) , 并且发送端在所述第一空闲信道上 采用单播的方式向所述接收端发送块确认请求 BAR帧, 以使所述接收端根 据所述 BAR帧向所述发送端发送块确认 BA帧时, 上述 S 103具体包括: 所 述发送端根据所述 BA帧判断所述数据是否全部传输成功; 若所述数据全 部传输成功,则所述发送端不再发送所述数据;若所述数据部分传输成功, 则所述发送端继续执行所述确定操作, 直至所述发送端判断不需要重新发 送所述数据中的传输失败的数据为止。
本发明实施例提供的数据传输方法, 可以参照上述通信设备的实施 例, 其实现原理和技术效果类似, 在此不再赘述。
本领域普通技术人员可以理解: 实现上述方法实施例的全部或部分步骤 可以通过程序指令相关的硬件来完成, 前述的程序可以存储于一计算机可读 取存储介质中, 该程序在执行时, 执行包括上述方法实施例的步骤; 而前述 的存储介质包括: R0M、 RAM, 磁碟或者光盘等各种可以存储程序代码的介质。
最后应说明的是: 以上各实施例仅用以说明本发明的技术方案, 而非对 其限制; 尽管参照前述各实施例对本发明进行了详细的说明, 本领域的普通 技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改, 或者对其中部分或者全部技术特征进行等同替换; 而这些修改或者替换, 并 不使相应技术方案的本质脱离本发明各实施例技术方案的范围。

Claims

权 利 要 求 书
1、 一种通信设备, 其特征在于, 包括:
确定模块, 用于执行确定操作, 以确定第一空闲信道的个数; 发送模块, 用于在每个所述第一空闲信道上向接收端发送数据; 判断模块, 用于判断是否重新发送所述数据; 若是, 则指示所述确定 模块继续执行所述确定操作, 直至判断所述发送模块不需要重新发送所述 数据为止; 若否, 则指示所述发送模块不再发送所述数据。
2、 根据权利要求 1所述的通信设备, 其特征在于, 所述确定模块, 具体用于确定所述通信设备当前能够接入的第二空闲信道; 并根据所述第 二空闲信道, 确定所述发送模块发送数据的所述第一空闲信道的个数。
3、 根据权利要求 2所述的通信设备, 其特征在于, 所述发送模块, 具体用于在每个所述第一空闲信道上采用相同或不同的冗余版本向所述 接收端发送所述数据, 以使所述接收端对所述数据进行解码。
4、 根据权利要求 2所述的通信设备, 其特征在于, 所述确定模块, 具体用于若所述第二空闲信道的个数等于 1, 则确定所述第一空闲信道的 个数等于 1 ; 若所述第二空闲信道的个数大于 1, 则确定所述第一空闲信 道的个数大于等于 1, 并小于等于所述第二空闲信道的个数。
5、 根据权利要求 2所述的通信设备, 其特征在于, 所述判断模块, 还用于判断所述发送模块当前发送所述数据是否为首次传输; 若是, 则所 述确定模块确定所述第一空闲信道的个数等于 1 ; 若否, 则所述确定模块 确定所述第一空闲信道的个数大于等于 1, 并小于等于所述第二空闲信道 的个数。
6、 根据权利要求 1所述的通信设备, 其特征在于, 所述发送模块, 具体用于采用单播的方式在所述第一空闲信道上向所述接收端发送所述 数据; 则所述判断模块, 具体用于判断所述数据是否传输成功; 若是, 则 指示所述发送模块不再发送所述数据; 若否, 则判断所述数据的累计发送 次数是否超过预设的传输总次数; 若是, 则指示所述发送模块不再发送所 述数据; 若否, 则指示所述确定模块继续执行所述确定操作, 直至判断所 述发送模块不需要重新发送所述数据为止。
7、 根据权利要求 1所述的通信设备, 其特征在于, 所述发送模块, 具体用于采用多播的方式在所述第一空闲信道上向所述接收端发送所述 数据; 则所述判断模块, 具体用于判断所述数据的累计发送次数是否超过 预设的传输总次数; 若是, 则指示所述发送模块不再发送所述数据; 若否, 则指示所述确定模块继续执行所述确定操作, 直至判断所述发送模块不需 要重新发送所述数据为止。
8、 根据权利要求 1所述的通信设备, 其特征在于, 所述发送模块, 具体用于采用组播的方式在所述第一空闲信道上向所述接收端发送所述 数据, 其中, 所述数据为一组数据; 并在所述第一空闲信道上采用单播的 方式向所述接收端发送块确认请求 BAR帧, 以使所述接收端根据所述 BAR 帧向所述发送端发送块确认 BA帧。
9、 根据权利要求 8所述的通信设备, 其特征在于, 所述判断模块, 具体用于根据所述 BA帧判断所述数据是否全部传输成功; 若所述数据全 部传输成功, 则指示所述发送模块不再发送所述数据; 若所述数据部分传 输成功, 则指示所述确定模块继续执行所述确定操作, 直至判断所述发送 模块不需要重新发送所述数据中的传输失败的数据为止。
10、 根据权利要求 2-9任一项所述的通信设备, 其特征在于, 所述确 定模块, 具体用于采用请求发送-允许发送 RTS-CTS握手的方式确定所述 第二空闲信道。
1 1、 一种数据传输方法, 其特征在于, 包括:
发送端执行确定操作, 以确定第一空闲信道的个数;
所述发送端在每个所述第一空闲信道上向接收端发送数据;
所述发送端判断是否重新发送所述数据; 若是, 则所述发送端继续执 行所述确定操作, 直至所述发送端判断不需要重新发送所述数据为止; 若 否, 则所述发送端不再发送所述数据。
12、 根据权利要求 1 1所述的方法, 其特征在于, 所述发送端执行确 定操作, 以确定第一空闲信道的个数, 包括:
所述发送端确定自身当前能够接入的第二空闲信道;
所述发送端根据所述第二空闲信道, 确定所述发送端发送数据的所述 第一空闲信道的个数。
13、 根据权利要 12所述的方法, 其特征在于, 所述发送端在每个所 述第一空闲信道上向所述接收端发送所述数据, 包括:
所述发送端在每个所述第一空闲信道上采用相同或不同的冗余版本 向所述接收端发送所述数据, 以使所述接收端对所述数据进行解码。
14、 根据权利要求 12所述的方法, 其特征在于, 所述发送端根据所 述第二空闲信道, 确定所述发送端发送数据的所述第一空闲信道的个数, 包括:
若所述第二空闲信道的个数等于 1, 则所述发送端确定所述第一空闲 信道的个数等于 1 ;
若所述第二空闲信道的个数大于 1, 则所述发送端确定所述第一空闲 信道的个数大于等于 1, 并小于等于所述第二空闲信道的个数。
15、 根据权利要求 12所述的方法, 其特征在于, 所述发送端根据所 述第二空闲信道, 确定所述发送端发送数据的所述第一空闲信道的个数, 包括:
所述发送端判断当前发送所述数据是否为首次传输;
若是, 则所述发送端确定所述第一空闲信道的个数等于 1 ;
若否, 则所述发送端确定所述第一空闲信道的个数大于等于 1, 并小 于等于所述第二空闲信道的个数。
16、 根据权利要求 11所述的方法, 其特征在于, 所述发送端在所述 第一空闲信道上向所述接收端发送所述数据, 包括: 所述发送端采用单播 的方式在所述第一空闲信道上向所述接收端发送所述数据;
则所述发送端判断是否重新发送所述数据, 包括:
所述发送端判断所述数据是否传输成功;
若是, 则所述发送端不再发送所述数据;
若否, 则所述发送端判断所述数据的累计发送次数是否超过预设的传 输总次数; 若是, 则所述发送端不再发送所述数据; 若否, 则所述发送端 继续执行所述确定操作, 直至所述发送端判断不需要重新发送所述数据为 止。
17、 根据权利要求 11所述的方法, 其特征在于, 所述发送端在所述 第一空闲信道上向所述接收端发送所述数据, 包括: 所述发送端采用多播 的方式在所述第一空闲信道上向所述接收端发送所述数据; 则所述发送端判断是否重新发送所述数据, 包括:
所述发送端判断所述数据的累计发送次数是否超过预设的传输总次 数; 若是, 则所述发送端不再发送所述数据; 若否, 则所述发送端继续执 行所述确定操作, 直至所述发送端判断不需要重新发送所述数据为止。
18、 根据权利要求 1 1所述的方法, 其特征在于, 所述发送端在所述 第一空闲信道上向所述接收端发送所述数据, 包括:
所述发送端采用组播的方式在所述第一空闲信道上向所述接收端发 送所述数据, 其中, 所述数据为一组数据;
所述发送端在所述第一空闲信道上采用单播的方式向所述接收端发 送块确认请求 BAR帧, 以使所述接收端根据所述 BAR帧向所述发送端发送 块确认 BA帧。
19、 根据权利要求 18所述的方法, 其特征在于, 所述发送端判断是 否重新发送所述数据, 包括:
所述发送端根据所述 BA帧判断所述数据是否全部传输成功; 若所述数据全部传输成功, 则所述发送端不再发送所述数据; 若所述数据部分传输成功, 则所述发送端继续执行所述确定操作, 直 至所述发送端判断不需要重新发送所述数据中的传输失败的数据为止。
20、 根据权利要求 12- 19任一项所述的方法, 其特征在于, 所述发送 端确定所述自身当前能够接入的第二空闲信道, 包括:
所述发送端采用请求发送-允许发送 RTS-CTS握手的方式确定所述第 二空闲信道。
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