WO2012058950A1 - 无线局域网中的传输方法和装置 - Google Patents

无线局域网中的传输方法和装置 Download PDF

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Publication number
WO2012058950A1
WO2012058950A1 PCT/CN2011/077637 CN2011077637W WO2012058950A1 WO 2012058950 A1 WO2012058950 A1 WO 2012058950A1 CN 2011077637 W CN2011077637 W CN 2011077637W WO 2012058950 A1 WO2012058950 A1 WO 2012058950A1
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WIPO (PCT)
Prior art keywords
channel
channel set
receiving station
transmission
station
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PCT/CN2011/077637
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English (en)
French (fr)
Inventor
李楠
吕开颖
孙波
李峰
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中兴通讯股份有限公司
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to EP11837477.6A priority Critical patent/EP2637433B1/en
Priority to US13/883,417 priority patent/US9414267B2/en
Publication of WO2012058950A1 publication Critical patent/WO2012058950A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W28/00Network traffic management; Network resource management
    • H04W28/16Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/26Resource reservation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053Allocation of signaling, i.e. of overhead other than pilot signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0091Signaling for the administration of the divided path
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202Channel estimation
    • H04L25/0204Channel estimation of multiple channels
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/0006Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0001Arrangements for dividing the transmission path
    • H04L5/0003Two-dimensional division
    • H04L5/0005Time-frequency
    • H04L5/0007Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058Allocation criteria
    • H04L5/006Quality of the received signal, e.g. BER, SNR, water filling
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • 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

  • the present invention relates to the field of communications, and in particular to a transmission method and apparatus in a wireless local area network.
  • WLANs wireless local area networks
  • the IEEE 802.il working group of the Institute of Electrical and Electronics Engineers has defined a series of WLAN technology standards such as 802.11a, 802.11b, 802.11g, etc., followed by other task groups, which are dedicated to the development of existing 802.11 technology improvements.
  • the specification, for example, the 802.11n task group proposes a high throughput (HT) requirement that supports data rates up to 600 Mbps.
  • HT high throughput
  • the 802.11ac task group further proposed the concept of VHT (Very High Throughput) to increase the data rate to lGbps.
  • VHT Very High Throughput
  • an access point (AP) and a plurality of non-access stations (STAs) associated with the AP form a basic service set (BSS).
  • BSS basic service set
  • 802.11 defines two modes of operation: Distributed Coordination Function (DCF) and Point Coordination Function (PCF), and improvements for these two modes of operation: Enhanced Distributed Coordination Hybrid Coordination Function Controlled Channel Access (HCCA).
  • DCF Distributed Coordination Function
  • PCF Point Coordination Function
  • HCCA Enhanced Distributed Coordination Hybrid Coordination Function Controlled Channel Access
  • Each frequency planning class has a sequence number corresponding to a set of operating rules for wireless devices, such as channel bandwidth, channel behavior limits, channel start frequency points, channel sets, and so on.
  • the traditional 20MHz channel bandwidth has been extended to 40MHz, 80MHz, 120MHz, or even 160MHz.
  • These large bandwidths are formed by a thousand 20MHz bundling, which is referred to herein as a basic channel.
  • one of the 20 MHz channels is called the primary channel or the first channel, and the other 20 MHz channels are called the secondary channel or the second channel, the third channel, and so on.
  • the large bandwidth consists of multiple 20 MHz channels that are non-overlapping.
  • the 160 MHz channel is adjacent Or two non-adjacent 80MHz channels, each 80MHz channel consists of two adjacent 40MHz channels, each 40MHz channel consists of two adjacent 20MHz channels.
  • An example of the composition of various bandwidth channels in a large bandwidth system is shown in FIG. Among them, in the 5.725GHz to 5.850GHz frequency band, there are two channelization methods: When the center frequency starts from 5.745GHz, there are five 20MHz non-overlapping channels in the frequency band when each channel bandwidth is 20MHz. The maximum channel bandwidth is 80MHz.
  • FIG. 2 A schematic diagram of the channelization method is shown in FIG. 2.
  • the channel formed by the previous channelization method is referred to as a first channel set, and the channel formed by the latter channelization method is referred to as a second channel set.
  • the 802.11n device only works on the first channel set, and the working bandwidth is 20/40 ⁇ ; the 802.11ac device that does not support the second channel set only works at the first On the channel set, the working bandwidth is 20/40/80 MHz; the 802.1 lac device supporting the second channel set can choose to work on the first or second channel set, and when working on the second channel set, the working bandwidth is 20/ 40/80/120MHz.
  • the inventors have found that in the prior art, if an 802.1 lac supporting a second channel set is used
  • the AP starts a BSS on the second channel set, and only the STA supporting the second channel set can scan the AP's working frequency point and complete the access, and does not support the second channel set of the 802.11ac STA and the 802.11n STA. ⁇ ! It is impossible to access, which causes the 802.11ac system to be backward compatible.
  • the present invention has been made in view of the problem that some stations cannot be accessed in the prior art. To this end, the main object of the present invention is to provide a transmission method and apparatus in a wireless local area network to solve at least one of the above problems.
  • a transmission method in a wireless local area network including: a transmitting station or a receiving station performing on a channel in a first channel set and/or a second channel set Channel detection and/or channel scanning; if the result of the detection and/or scanning satisfies a predetermined condition, the transmitting station and the receiving station exchange a reservation message on the channel of the first channel set or the second channel set, wherein The reservation message is used to reserve a channel in the second channel set used for transmission; the transmitting station transmits a data frame to the receiving station on the reserved channel in the second channel set; after receiving the data frame, The receiving station transmits the acknowledgement information for the data frame on the channel of the first channel set or the second channel set.
  • the method further includes: transmitting, by the transmitting station, the first type of radio frame different from the data frame on the channel of the first channel set and the receiving station.
  • the first type of radio frame described above includes: a management frame.
  • the step of the transmitting device and the receiving device scheduling the channel in the second channel set used for the transmission: the transmitting station and the receiving station interacting with the reservation message on a channel of the second channel set to be reserved, or And the sending station interacts with the receiving station on the channel that overlaps with the channel to be reserved in the first channel set, where the reservation message carries: the reservation message carries: occupation required for transmission on the channel to be reserved time.
  • the sending station Before the sending station exchanges the reservation message with the receiving station, the sending station further includes: the sending station transmitting, on the channel of the first channel set, a radio frame for scheduling a length of time required for transmitting one or more of the data frames.
  • the method further includes: sending, by the sending station, the indication information to the receiving station, where the indication information indicates that the following content is at least One: the channel bandwidth to be reserved, the channel set to which the channel to be reserved belongs. ⁇ Carrying the above indication information in the following manner: carried in the above reservation message, or carried by other messages before the reservation message is sent.
  • Determining whether the result of the detection and/or scanning meets a predetermined condition by determining whether there is a channel without interference in the first channel set and the second channel set, or a channel having a interference signal value less than a predetermined threshold If present, it is determined that the result of the detection and/or scanning satisfies the predetermined condition.
  • the method further includes: sending, by the sending station, the transmission mode to the receiving station by using a signaling, where the foregoing transmission mode includes And: the transmitting station and the receiving station exchange a reservation message on a channel of the first channel set or the second channel set, and reserve a channel in a channel set used for transmission; and the transmitting station and the receiving station perform data on a reserved channel.
  • the receiving station sends the acknowledgement of the data frame on the channel of the first channel set or the second channel set after receiving the data frame.
  • the channel bandwidth formed by the channels in the first channel set includes: 20 MHz, 40 MHz, 80 MHz; the channel bandwidth formed by the channels in the second channel set includes: 20 MHz, 40 MHz, 80 MHz, 120 MHz resort a channel set and the second channel set are sets of channels formed by using different channelization methods for the same frequency band, wherein a center frequency point of the channel in the first channel set and a channel in the second channel set The center frequency of the first channel set overlaps with the channel of the second channel set in whole or in part.
  • a transmission in a wireless local area network is provided.
  • the device is disposed in the transmitting device, where the transmitting device includes: a detecting unit configured to perform channel detection and/or channel scanning on the channel in the first channel set and/or the second channel set; and the reservation unit is configured to be in When the result of the detection and/or scanning satisfies a predetermined condition, the receiving station is in the first channel set or the second channel Interworking reservation message on the combined channel, wherein the reservation message is used to reserve a channel in the second channel set used for transmission; and the transmission unit is configured to send the data frame on the reserved channel in the second channel set And the receiving station receives the confirmation information of the data frame by the receiving station.
  • the reservation unit includes: a first reservation module, configured to exchange the reservation message with the receiving station on a channel of the second channel set to be reserved. Or, the foregoing receiving message is exchanged with the receiving station on the channel that overlaps with the channel to be reserved in the first channel set, where the reservation message carries: occupation required for transmission on the channel to be reserved.
  • the foregoing reservation unit includes: a second reservation module, configured to send, on a channel of the first channel set, a time length required for scheduling to transmit one or more of the data frames before the reservation message is exchanged with the receiving station Radio frame.
  • the above transmission unit includes: The transmission module is configured to perform transmission and reception of a first type of radio frame different from the data frame on the channel of the first channel set and the receiving station on a channel of the first channel set.
  • the method includes: a second transmission module, configured to send a notification message to the receiving station before sending the data frame to the receiving station on the reserved channel in the second channel set
  • the indication information indicates at least one of the following: a channel bandwidth to be reserved, and a channel set to which the channel to be reserved belongs.
  • the foregoing transmission device further includes: a determining unit, configured to determine whether the result of the detected and/or scanning meets a predetermined condition by: determining whether there is a channel without interference in the first channel set and the second channel set, or There is a channel whose interference signal value is less than a predetermined threshold; if present, it is determined that the result of the detection and/or scanning satisfies a predetermined condition.
  • channel detection is performed on the first channel set and/or the second channel set by the transmitting station or the receiving station, and it is determined whether the channel in the second channel set can be currently used for transmission, thereby enabling the second channel set to be supported.
  • the station transmits data frames on the second channel set, which increases the flexibility of transmission, and enables the stations supporting the second channel set and the stations supporting only the first channel set to work together in the wireless network, so that the system has good performance. Backward compatibility.
  • FIG. 1 is a schematic diagram showing the composition of different channel bandwidths of a large bandwidth system according to the related art
  • FIG. 2 is a schematic diagram of a channel set formed by different channelization methods in a frequency band of 5.725 GHz to 5.850 GHz according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of a detected and/or scanned channel set according to an embodiment of the present invention
  • 6 is another preferred structural diagram of a transmission device in a wireless local area network according to an embodiment of the present invention.
  • FIG. 3 is a preferred flowchart of a transmission method in a wireless local area network according to an embodiment of the present invention, which includes the following steps:
  • the transmitting station or the receiving station performs channel detection and/or channel scanning on a channel in the first channel set and/or the second channel set.
  • the sending station and the receiving station exchange a reservation message on a channel of the first channel set or the second channel set, where the reservation The message is used to reserve a channel in the second set of channels used for transmission;
  • the sending station sends a data frame to the receiving station on the reserved channel in the second channel set.
  • the receiving station After receiving the data frame, the receiving station sends acknowledgement information about the data frame on a channel of the first channel set or the second channel set.
  • channel scanning and/or channel detection is performed on the first channel set and/or the second channel set to determine whether data can be currently transmitted using the channel in the second channel set.
  • the frame enables the stations supporting the second set of channels and the stations supporting only the first set of channels to work together in the wireless network, so that the system has good backward compatibility.
  • the transmission method in the WLAN according to the embodiment of the present invention further includes: the sending station performing the same with the receiving station on the channel of the first channel set Transceiver of a first type of radio frame different from the data frame.
  • the foregoing first type of radio frame includes: a management frame.
  • the step of the transmitting device and the receiving device to reserve a channel in the second channel set used for transmission comprises: a channel of the second channel set to be reserved by the sending station and the receiving station Interacting the reservation message, or the sending station and the receiving station interacting with the reservation message on a channel in the first channel set that overlaps with a channel to be reserved; wherein the reservation message Carryed: The elapsed time required to transmit on the channel to be reserved.
  • the occupation time required for transmission by the reserved channel is such that the other stations do not use the reserved channel for transmission during the time period, which reduces the collision and ensures the reliability of data transmission.
  • the transmitting method in the wireless local area network according to the embodiment of the present invention before the sending station exchanges the reservation message with the receiving station further includes: the sending station sending on the channel of the first channel set A radio frame for scheduling the length of time required to transmit one or more of the data frames.
  • the transmitting and receiving parties can transmit multiple data frames within a predetermined time, thereby increasing the utilization and flexibility of system resources.
  • the transmitting method in the WLAN further includes: The station sends the indication information to the receiving station, where the indication information indicates at least one of the following: a channel bandwidth to be reserved, and a channel set to which the channel to be reserved belongs.
  • the receiving station can explicitly correlate the relevant channel parameters used for receiving the information, thereby achieving accurate reception.
  • the indication information is carried in the following manner: carried in the subscription message, or carried by other messages before the reservation message is sent.
  • the above indication information is carried by different messages, which increases the flexibility of the present invention.
  • whether the result of the detecting and/or scanning meets a predetermined condition may be determined by determining whether there is no presence in the first channel set and the second channel set. A channel that is disturbed, or a channel in which the value of the interference signal is less than a predetermined threshold; if present, it is determined that the result of the detection and/or scanning satisfies a predetermined condition.
  • the results of the detection and/or scanning can be accurately determined by the above-described judging step.
  • the method before the transmitting station sends the data frame to the receiving station on the reserved channel in the second channel set, the method further includes: the sending station Notifying, by the signaling, the transmission mode to the receiving station, where the transmission mode comprises: the transmitting station and the receiving station interacting with each other on a channel of the first channel set or the second channel set Reserving a channel in a channel set used for transmission; the transmitting station and the receiving station performing data frame transmission on a reserved channel, and after receiving the data frame, the receiving station is in a first channel set or a second An acknowledgment of the data frame is sent on the channel of the set of channels.
  • the communication parties are informed of the mode to be transmitted in a notification manner, and both parties can prepare for transmission in advance, thereby ensuring the accuracy of data transmission and reception.
  • the step of the transmitting station notifying the receiving mode to the receiving station by using the signaling includes: the sending station carrying the first channel set and the management frame sent on the channel of the first channel set The frequency planning class information to which the second channel set belongs.
  • the receiving station knows the frequency planning class of the first channel set and the second channel set in a notification manner, determines the transmission mode and the used channel, thereby ensuring the accuracy of data reception.
  • the channel bandwidth formed by the channels in the first channel set includes: 20 MHz, 40
  • the channel bandwidth formed by the channels in the second channel set includes: 20 MHz, 40 MHz, 80 MHz, 120 MHz.
  • the defined channel bandwidth conforms to the evolution criteria of the wireless local area network for backward compatibility.
  • the first channel set and the second channel set are a set of channels formed by using different channelization methods for the same frequency band, where a center frequency of the channel in the first channel set is The center frequency points of the channels in the second channel set are different, and the channels of the first channel set overlap with all or part of the channels of the second channel set.
  • the defined set of channels is generated in a manner that meets the requirements of the standards of a wireless local area network.
  • Example 2 This embodiment describes an application method for performing frame exchange sequence transmission using a first channel set and a second channel set.
  • the frame exchange sequence includes data frames, and control frames related to data transmission, such as channel reservation request/response frames, acknowledgement frames for data, etc., which form a sequence in accordance with the transmission and reception timing relationship.
  • the AP supports working in the first channel set and the second channel set, and the AP is associated with multiple capability STAs, for example, only supports 802.11n STAs working on the first channel set, and 802.11ac does not support the second channel set.
  • STA, and an 802.11ac STA supporting the first and second channel sets when the AP works at 20/40/80 MHz, the AP and the STA exchange channel reservation request/response frames on the channel of the first channel set to perform data. Transmission of frames and acknowledgment frames.
  • the control frame refers to a frame used for controlling data transmission and reception, and includes at least one of the following: a channel reservation request frame (RTS), a channel reservation response frame (CTS), an acknowledgement frame (ACK), and a poll frame (PS-Poll).
  • RTS channel reservation request frame
  • CTS channel reservation response frame
  • ACK acknowledgement frame
  • PS-Poll poll frame
  • the AP and the STA also transmit a management frame on the channel of the first channel set
  • the management frame refers to a frame used for BSS management
  • the management frame related to the access process includes at least one of the following: Beacon , Association Request , Association Response , Reassociati on Request , Reassociati on Response , Disassociation , Listening Request Request, Probe Response, Authentication, Deauthentication, and Action.
  • a data frame is a frame used to transmit data.
  • the AP or the non-AP STA associated with the AP performs channel scanning and/or channel detection on the five 20 MHz basic channels of the first channel set, or performs channel scanning on the six 20 MHz basic channels of the second channel set and/or Channel detection, when detecting that the interference of the five 20 MHz basic channels of the first channel set or the six 20 MHz basic channels of the second channel set is lower than a set threshold, or determining that the second channel set is not thousands according to the scan result During the disturbance, it is judged that the channel of the second channel set is available, and the data frame is transmitted by using the 120 MHz channel of the second channel set. The AP needs to perform channel reservation before transmitting the data frame on the 120 MHz channel of the second channel set.
  • the specific method is: interacting RTS/CTS frames on five 20 MHz channels of the first channel set.
  • the AP sends an RTS to the STA on the five 20 MHz channels of the first channel set, and the STA detects the preamble of the RTS frame on the five 20 MHz channels of the first channel set, and learns that the AP is about to start at the second channel set.
  • the data frame transmission is performed at 120 MHz, and then the STA replies to the CTS (including at least the primary channel) on the channel of the first set channel set that is received by the RTS and is also detected as idle, in this example, if the first channel set is 5 When the 20 MHz channel is detected as idle, the CTS is returned on it, thereby completing the reservation of the 120 MHz transmission.
  • the AP can also send a notification letter.
  • the STA is instructed to indicate at least one of the following: the channel bandwidth to be reserved (120 MHz in this example), and the channel set to which the channel to be reserved belongs (in this example, the second channel set).
  • the above indication information may be carried in an RTS frame for transmission.
  • the AP and the STA transmit a 120 MHz data frame on the channel of the second channel set, and transmit an ACK frame to the data frame.
  • the ACK frame may be sent to the AP on the 5 20 MHz channels of the first channel set, or sent to the AP only on the primary channel of the first channel set, or sent to the AP in the second channel set with a bandwidth of 120 MHz.
  • the AP before transmitting the data frame on the 120 MHz channel of the second channel set, the AP carries the indication information through other messages before the RTS/CTS frame is sent, indicating at least one of the following: the channel bandwidth to be reserved (in this example, 120 MHz) ), the set of channels to which the channel to be reserved belongs (in this example, the second set of channels). For example, send a setup frame containing the above instructions. Then, the CTS to self frame is transmitted on the five 20 MHz channels of the first channel set, the length of time to be reserved on the channel of the second channel set is reserved, and then the AP and the STA are in the first 20 channels of the 20 MHz channel.
  • the channel bandwidth to be reserved in this example, 120 MHz
  • the set of channels to which the channel to be reserved belongs in this example, the second set of channels.
  • the upper interactive RTS/CTS frame transmits a 120 MHz data frame on the channel of the second channel set and transmits an ACK frame to the data frame.
  • the ACK frame may be sent to the AP on the 5 20 MHz channels of the first channel set, or sent to the AP only on the primary channel, or sent to the AP in the second channel set with a bandwidth of 120 MHz.
  • the length of time occupied by the channel reserved by the CTS to self frame may include the transmission time of the multiple data frame, that is, the time required for the AP to transmit multiple RTS/CTS, data frame, and ACK frame between the STA and the STA.
  • the AP and the STA both explicitly perform data frame transmission in the second set of 120 MHz, and reserve the channel occupation time for the upcoming 120 MHz transmission by using the reserved channel method, so that other STAs do not These channels are then used for transmission.
  • the control frame is transmitted on the first channel set, ensuring that all other stations can receive and parse the control frame to achieve the channel reservation purpose; related to the access process
  • the management frame is transmitted on the first channel set, which ensures that only stations supporting the first channel set can access the AP.
  • Embodiment 3 This embodiment describes an application method for performing frame exchange sequence transmission at 120 MHz by using a second channel set. Specifically, the second channel set is used to transmit data frames and control frames. The AP supports working in the first channel set and the second channel set, and the AP is associated with multiple capabilities.
  • the STA for example, has only supported 802.11n STAs working on the first channel set, and does not support the second channel.
  • Related management frames and data frames are related to the AP.
  • the AP, or the non-AP STA associated with the AP performs channel scanning and/or channel detection on the five 20 MHz basic channels of the first channel set, or performs channel scanning on the six 20 MHz basic channels of the second channel set and/or Or channel detection, when detecting that the interference of the five 20 MHz basic channels of the first channel set or the six 20 MHz basic channels of the second channel set is lower than a set threshold, or determining that the second channel set is not according to the scan result
  • the management frames associated with the access procedure are transmitted on the first set of channels, ensuring that only stations supporting the first set of channels can access the AP.
  • the AP Before transmitting the 120 MHz channel of the second channel set, the AP first sends indication information to the STA, indicating at least one of the following: a channel bandwidth to be reserved (120 MHz in this example), and a channel set to which the channel to be reserved belongs ( In this example, it is a second channel set). For example, send a setup frame containing the above instructions. The CTS to self frame is then transmitted on the five 20 MHz channels of the first channel set, preserving the length of time that will be occupied on the channel of the second channel set.
  • the RTS/CTS frame is exchanged on the six 20 MHz channels of the second channel set, the 120 MHz data frame is transmitted on the channel of the second channel set, and the ACK frame for the data frame is transmitted on the second channel set.
  • both the AP and the STA are clear that data frame transmission will be performed at 120 MHz.
  • the channel occupation time is reserved for the upcoming 120 MHz transmission, so that other STAs do not use these channels for transmission during the time period.
  • the AP can be compatible with a plurality of STAs working under different channel sets.
  • the AP supports working in the first channel set and the second channel set, and the AP is associated with multiple capability STAs, for example, only supports 802.11n STAs working on the first channel set, and 802.1 lac that does not support the second channel set.
  • STA, and 802.1 lac STA supporting the first and second channel sets the AP works in the following manner: When the AP works at 20/40/80 MHz, the AP transmits control frames and manages on the channel of the first channel set. The frame and the data frame, at the same time, the AP, or the STA associated with the AP, scans/detects the channel of the second channel set, and determines that the channel of the second channel set is available, and then uses the second channel to transmit the data frame. As shown in FIG.
  • the AP performs channel scanning and/or channel detection on channel 11, channel 12, and channel 13 of the first channel set, or channels 21, channel 22, channel 23, and channel 24 of the second channel set. Scan and / or channel detection.
  • the interference of the three 20 MHz basic channels of the first channel set or the four 20 MHz basic channels of the second channel set is lower than a set threshold, or determining that the second channel set is not interfered according to the scan result And determining that the channel of the second channel set is available, and transmitting the data frame by using the 80 MHz large bandwidth channel composed of four 20 MHz of the second channel set.
  • it can be determined whether the channel in the second channel set can be used.
  • the AP needs to perform channel reservation before transmitting the data frame on the 80 MHz channel of the second channel set.
  • the specific method is: interaction RTS/CTS frame on channel 11, channel 12, channel 13 of the first channel set, or sending CTS To self frame.
  • the channel occupation time is reserved for the upcoming 80 MHz transmission, so that other STAs do not use these channels for transmission during the time period.
  • both the AP and the STA explicitly transmit the data frame at 80 MHz, and the AP can also notify the STA to transmit the data frame at 80 MHz of the second channel set by sending signaling.
  • the AP can be made compatible with a plurality of STAs operating under different channel sets, and can fully utilize the non-chast channel of multiple channel sets for transmission.
  • the AP supports working in the first channel set and the second channel set, and the AP is associated with multiple capability STAs, for example, an 802.11n STA operating only on the first channel set, and an 802.1 lac STA not supporting the second channel set. There is also an 802.1 lac STA supporting the first and second channel sets, and the AP works in the following manner: When the AP works at 20/40/80 MHz, the AP transmits control frames and management frames on the channel of the first channel set. And the data frame, at the same time, the AP, or the STA associated with the AP, scans/detects the channel of the second channel set, determines that the channel of the second channel set is available, and uses the second channel to transmit the frame exchange sequence.
  • the AP performs channel scanning and/or channel detection on the channel 11, channel 12, and channel 13 of the first channel set, or performs channel scanning on the channel 21, channel 22, channel 23, and channel 24 of the second channel set. And/or channel detection, when it is detected that the interference of the three basic channels of the first channel set or the four basic channels of the second channel set is lower than a set threshold, or determining that the second channel set is not according to the scan result In the case of interference, it is judged that the channel of the second channel set is available, and the frame exchange sequence transmission is performed by using the 80 MHz channel of the second channel set. As in the third embodiment, by scanning and/or detecting three channels in the first channel set that overlap with the four channels in the second channel set, it can be determined whether the channel in the second channel set can used.
  • the AP needs to perform channel reservation before transmitting the 80 MHz channel of the second channel set.
  • the specific method is: first sending indication information to the STA, indicating at least one of the following: the channel bandwidth to be reserved (80 MHz in this example)
  • the set of channels to which the channel to be reserved belongs (in this example, the second set of channels). For example, send a setup frame containing the above instructions.
  • the CTS to self frame is then transmitted on the three 20 MHz channels of the first channel set, preserving the length of time that will be occupied on the channel of the second channel set.
  • the RTS/CTS frame is exchanged on the four 20 MHz channels of the second channel set, the 80 MHz data frame is transmitted on the channel of the second channel set, and the ACK frame for the data frame is transmitted on the second channel set.
  • the management frame associated with the access procedure is still transmitted on the first channel set.
  • the notification mode may be a management frame sent on a channel of the first channel set, for example, a beacon frame and a probe_response frame carrying a frequency planning class supporting two channel sets.
  • Table 1 gives an example: Table 1 Channel Planning Class Identification Number
  • FIG. 5 is a block diagram showing a preferred configuration of a transmission apparatus in a wireless local area network according to an embodiment of the present invention.
  • the transmission device is disposed in a transmitting device, where the transmitting device includes: a detecting unit 502, configured to perform channel detection and/or channel on a channel in the first channel set and/or the second channel set.
  • a scanning unit 504 configured to be connected to the detecting unit 502, configured to, on the channel of the first channel set or the second channel set, with the receiving station when the detected and/or scanned result satisfies a predetermined condition
  • An interaction reservation message wherein the reservation message is used to reserve a channel in the second channel set used for transmission;
  • a transmission unit 506 is connected to the reservation unit 504, and configured to be reserved in the second channel set.
  • the aggregated station transmits data frames on the second channel set, which increases the flexibility of transmission, and enables the stations supporting the second channel set and the stations supporting only the first channel set to work together in the wireless network, so that the system has good Backward compatibility.
  • the reservation unit 504 in the wireless local area network is configured to reserve the second channel set used by the receiving station before the transmission on the channel in the second channel set and the receiving station. The time taken by the channel.
  • FIG. 1 As shown in FIG.
  • the reservation unit 504 includes: a first reservation module 5041, configured to exchange the reservation message with the receiving station on a channel of the second channel set to be reserved, or Intersecting the reservation message with the receiving station on a channel in the first channel set that overlaps with a channel to be reserved, wherein the reservation message carries: required for transmission on a channel to be reserved Occupation time.
  • the occupation time required for transmission by the reserved channel is such that the other stations do not use the reserved channel for transmission during the time period, which reduces the collision and ensures the reliability of data transmission.
  • the reservation unit 504 includes: a second reservation module 5042, configured to send, on a channel of the first channel set, one or more of the foregoing for transmitting a reservation message before the reservation message is exchanged with the receiving station.
  • the transmitting and receiving parties can transmit multiple data frames within a predetermined time, thereby increasing the utilization and flexibility of system resources.
  • the transmitting unit 506 includes: a first transmission module 5061, configured to perform, on the channel of the first channel set, with the receiving station, when the result of detecting and/or scanning satisfies a predetermined condition Transceiver of a first type of radio frame with different data frames.
  • the first type of radio frame comprises: a management frame, or a control frame and the management frame.
  • the control frame and the data frame are transmitted on the reserved channel in the second channel set.
  • the transmitting unit 506 further includes: a second transmission module 5062, configured to send, to the receiving station, a data frame before sending the data frame to the receiving station on the reserved channel in the second channel set
  • the indication information indicates at least one of the following: a channel bandwidth to be reserved, and a channel set to which the channel to be reserved belongs.
  • the receiving station can explicitly correlate the relevant channel parameters used for receiving the information, thereby achieving accurate reception.
  • the indication information is carried in the following manner: carried in the subscription message, or carried by other messages before the reservation message is sent.
  • the above indication information is carried by different messages, which increases the flexibility of the present invention.
  • the transmitting device in the wireless local area network further includes: a determining unit 508, configured to determine, by using the following steps, whether the result of the detected and/or scanning meets a predetermined condition: determining the first channel set And whether there is a channel without interference in the second channel set, or there is a channel whose interference signal value is less than a predetermined threshold; if present, it is determined that the result of the detection and/or scanning satisfies a predetermined condition.
  • the result of the detection and/or scanning can be accurately determined by the above-described decision step.
  • the method before the transmitting, by the transmitting unit 506, the data frame to the receiving station on the reserved channel in the second channel set, the method further includes: And the transmitting mode is notified to the receiving station, where the transmitting mode includes: the sending device and the receiving station exchange an appointment message on a channel of the first channel set or the second channel set, and make an appointment. Transmitting a channel in the used channel set; the transmitting device and the receiving station performing data frame transmission on the reserved channel, and after receiving the data frame, the receiving station is in the first channel set or the second channel set A confirmation of the data frame is sent on the channel.
  • the communication parties are informed of the mode to be transmitted in a notification manner, and the communication parties can prepare for transmission in advance, thereby ensuring the accuracy of data transmission and reception.
  • the transmitting unit 506 notifying the receiving mode to the receiving station by signaling: the transmitting unit 506 carries the first channel set and the management frame in a management frame sent on a channel of the first channel set The frequency planning class information to which the second channel set belongs.
  • the receiving station knows the frequency planning class of the first channel set and the second channel set in a notification manner, determines the transmission mode and the used channel, thereby ensuring the accuracy of data reception.
  • the channel bandwidth formed by the channels in the first channel set includes: 20 MHz, 40 MHz, 80 MHz; the channel bandwidth formed by the channels in the second channel set includes: 20 MHz, 40 MHz, 80 MHz, 120 MHz.
  • the defined channel bandwidth conforms to the evolution criteria of the wireless local area network for backward compatibility.
  • the first channel set and the second channel set are a set of channels formed by using different channelization methods for the same frequency band, where a center frequency of the channel in the first channel set is The center frequency points of the channels in the second channel set are different, and the channels of the first channel set overlap with all or part of the channels of the second channel set.
  • the defined set of channels is generated in a manner that meets the requirements of the standards of a wireless local area network.
  • steps shown in the flowchart of the accompanying drawings may be performed in a computer system such as a set of computer executable instructions, and, although the logical order is shown in the flowchart, in some cases, The steps shown or described may be performed in an order different from that herein.
  • a general-purpose computing device which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices.
  • the invention is not limited to any specific combination of hardware and software.
  • the above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the scope of the present invention are intended to be included within the scope of the present invention.

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Abstract

本发明公开了一种无线局域网中的传输方法和装置,其中,该方法包括:发送站点或接收站点在第一信道集合和/或第二信道集合中的信道上进行信道检测和/或信道扫描;若检测和/或扫描的结果满足预定条件,则上述发送站点与上述接收站点在上述第一信道集合或上述第二信道集合的信道上交互预约消息,其中,上述预约消息用于预约传输所用的上述第二信道集合中的信道;上述发送站点在上述第二信道集合中的所预约的信道上将数据帧发送给上述接收站点;在收到上述数据帧后,上述接收站点在上述第一信道集合或第二信道集合的信道上发送对上述数据帧的确认信息。本发明解决了部分站点无法接入的问题,从而使系统具有良好的后向兼容性。

Description

无线局域网中的传输方法和装置 技术领域 本发明涉及通信领域, 具体而言, 涉及一种无线局域网中的传输方法和装 置。 背景技术 目前, 在无线网络领 i或, 无线局 i或网 (Wireless Local Area Network, 简称 WLAN )快速发展, WLAN覆盖需求日益增长。 电气和电子工程师协会工业规 范 IEEE802. il工作组先后定义了 802.11a, 802.11b, 802. llg等一系列 WLAN 技术标准, 随后又陆续出现了其他任务组, 致力于发展涉及现有 802.11技术改 进的规范, 例如, 802.11η任务组提出高吞吐量 (High throughput,简称 HT ) 的 要求, 支持高达 600Mbps的数据速。 作为 802.11η的演进, 802.11ac任务组进 一步提出 VHT ( Very High throughput, 超高吞吐量) 的概念, 将数据速率提升 到 lGbps„ 新的协议需要后向兼容现有协议。
802.11 中, 一个接入站点 (Access Point, 简称 AP ) 以及与 AP相关联的 多个非接入站点( Station,简称 STA )组成了一个基本月艮务集( Basic Service Set, 简称 BSS )。 802.11 定义了两种操作模式: 分布式协调功能 (Distributed Coordination Function , 简称 DCF )和点十办调功能 ( Point Coordination Function , 简称 PCF ), 以及针对这两种操作模式的改进: 增强型分布式协调访问功能 ( Enhanced Distributed Channel Access , 简称 EDC A )和混合协调功能控制信道 访问功能 ( Hybrid Coordination Function Controlled Channel Access , 简称 HCCA )。
802.11协议中定义了频率规划类的概念, 每个频率规划类拥有一个序号, 对应一组针对无线设备的操作规则, 例如信道带宽、 信道行为限制、 信道起始 频点、 信道集合等等。 随着 802.11协议的演进, 传统的 20MHz信道带宽已经 扩展为 40MHz、 80MHz、 120MHz,甚至 160MHz,这些大带宽是由若千个 20MHz 绑定形成的,这里称 20MHz信道是一个基本信道。大带宽时,其中一个 20MHz 信道称为主信道或第一信道, 其他 20MHz信道称为辅信道或第二信道, 第三 信道, 依次类推。 这样, 在 5GHz频谱上, 大带宽由非重叠 (non-overlapping ) 的多个 20MHz信道组成。才艮据现有技术中的信道化方法, 160MHz信道由相邻 或不相邻的两个 80MHz信道组成, 每个 80MHz信道由相邻的两个 40MHz信 道组成, 每个 40MHz信道由相邻的两个 20MHz信道组成。 大带宽系统中各种 不同带宽信道的组成示例如图 1所示。 其中, 在 5.725GHz至 5.850GHz频段, 存在两种信道化方法: 当中心频点从 5.745GHz 开始, 按照每个信道带宽为 20MHz划分时, 该频段内存在 5个 20MHz的互不交叠的信道, 最大信道带宽 为 80MHz; 如果将上述每个中心频点向氐频点方向偏移 7.5MHz时, 该频段内 将产生 6个互不交叠的 20MHz信道, 最大信道带宽为 120MHz, 上述两种信道 化方法的示意图如图 2所示。 以下, 称前一信道化方法所形成的信道为第一信 道集合, 称后一信道化方法所形成的信道为第二信道集合。 才艮据现有技术, 在 5.725GHz至 5.850GHz频段内, 802.11η设备仅工作在 第一信道集合上, 工作带宽为 20/40ΜΗΖ; 不支持第二信道集合的 802.11ac设 备仅工作在第一信道集合上, 工作带宽为 20/40/80MHZ; 支持第二信道集合的 802.1 lac设备可以选择工作在第一或第二信道集合上, 当工作在第二信道集合 上时, 工作带宽为 20/40/80/120MHz。 然而, 发明人发现在现有技术中如果一个支持第二信道集合的 802.1 lac的
AP在第二信道集合上开始一个 BSS , 则只有支持第二信道集合的 STA能够扫 描到 AP的工作频点并完成接入, 而不支持第二信道集合的 802.11ac的 STA和 802.11η的 STA ^!夺无法接入, 从而造成 802.11ac系统无法后向兼容的问题。 发明内容 针对现有技术中部分站点无法接入的问题而提出本发明, 为此, 本发明的 主要目的在于提供一种无线局域网中的传输方法和装置, 以解决上述问题至少 之一。 为了实现上述目的, 才艮据本发明的一个方面, 提供了一种无线局域网中的 传输方法, 其包括: 发送站点或接收站点在第一信道集合和 /或第二信道集合中 的信道上进行信道检测和 /或信道扫描; 若检测和 /或扫描的结果满足预定条件 , 则上述发送站点与上述接收站点在上述第一信道集合或上述第二信道集合的 信道上交互预约消息, 其中, 上述预约消息用于预约传输所用的上述第二信道 集合中的信道; 上述发送站点在上述第二信道集合中的所预约的信道上将数据 帧发送给上述接收站点; 在收到上述数据帧后, 上述接收站点在上述第一信道 集合或第二信道集合的信道上发送对上述数据帧的确认信息。 若检测和 /或扫描的结果满足预定条件, 还包括: 上述发送站点在上述第一 信道集合的信道上与上述接收站点进行与上述数据帧不同的第一类型无线帧 的收发。 上述第一类型无线帧包括: 管理帧。 上述发送设备与上述接收设备预约传输所用的上述第二信道集合中的信 道的步骤包括: 上述发送站点与上述接收站点在所要预约的上述第二信道集合 的信道上交互上述预约消息, 或者, 上述发送站点与上述接收站点在上述第一 信道集合中的与所要预约的信道存在交叠的信道上交互上述预约消息; 其中, 上述预约消息携带有: 在所要预约的信道上进行传输所需的占用时间。 上述发送站点在与上述接收站点交互预约消息之前, 还包括: 上述发送站 点在上述第一信道集合的信道上发送用于预约传输一个或多个上述数据帧所 需的时间长度的无线帧。 上述发送站点在上述第二信道集合中的所预约的信道上将数据帧发送给 上述接收站点之前, 还包括: 上述发送站点向上述接收站点发送指示信息, 其 中, 上述指示信息指示以下内容至少之一: 所要预约的信道带宽, 所要预约的 信道所属的信道集合。 釆用以下方式携带上述指示信息: 在上述预约消息中携带, 或者, 在上述 预约消息发送前通过其他消息携带。 通过以下步骤判断上述所检测和 /或扫描的结果是否满足预定条件:判断上 述第一信道集合和第二信道集合中是否存在没有千扰的信道, 或者, 存在千扰 信号值小于预定阈值的信道; 若存在, 则判断出所检测和 /或扫描的结果满足预 定条件。 上述发送站点在上述第二信道集合中的所预约的信道上将数据帧发送给 上述接收站点之前, 还包括: 上述发送站点通过信令将传输模式通知给上述接 收站点, 其中, 上述传输模式包括: 上述发送站点与上述接收站点在上述第一 信道集合或上述第二信道集合的信道上交互预约消息, 预约传输所用信道集合 中的信道; 上述发送站点与上述接收站点在预约的信道上进行数据帧的传输, 上述接收站点收到上述数据帧后, 在第一信道集合或第二信道集合的信道上发 送对上述数据帧的确认。 上述发送站点通过信令将传输模式通知给上述接收站点的步骤包括: 上述 发送站点在上述第一信道集合的信道上发送的管理帧中携带上述第一信道集 合和上述第二信道集合所属的频率规划类信息。 上述第一信道集合中的信道构成的信道带宽包括: 20 MHz、 40 MHz、 80MHz; 上述第二信道集合中的信道构成的信道带宽包括: 20 MHz, 40 MHz、 80 MHz, 120 MHz„ 上述第一信道集合和上述第二信道集合是对同一频段釆用不同的信道化 方法所形成的信道的集合, 其中, 上述第一信道集合中的信道的中心频点与上 述第二信道集合中的信道的中心频点不同, 上述第一信道集合的信道与第二信 道集合的信道全部或部分交叠。 为了实现上述目的, 才艮据本发明的另一方面, 提供了一种无线局域网中的 传输装置, 设置在发送设备中, 其中, 该传输装置包括: 检测单元, 设置为对 第一信道集合和 /或第二信道集合中的信道进行信道检测和 /或信道扫描; 预约 单元, 设置为在所检测和 /或扫描的结果满足预定条件时, 与上述接收站点在上 述第一信道集合或上述第二信道集合的信道上交互预约消息, 其中, 上述预约 消息用于预约传输所用的上述第二信道集合中的信道; 传输单元, 设置为在上 述第二信道集合中的所预约的信道上将数据帧发送给上述接收站点, 并接收上 述接收站点对上述数据帧的确认信息。 上述预约单元包括: 第一预约模块, 设置为与上述接收站点在所要预约的 上述第二信道集合的信道上交互上述预约消息, 或者, 与上述接收站点在上述 第一信道集合中的与所要预约的信道存在交叠的信道上交互上述预约消息, 其 中, 上述预约消息携带有: 在所要预约的信道进行传输所需的占用时间。 上述预约单元包括: 第二预约模块, 设置为在与上述接收站点交互预约消 息之前, 在上述第一信道集合的信道上发送用于预约传输一个或多个上述数据 帧所需的时间长度的无线帧。 上述传输单元包括: 第一传输模块, 设置为在检测和 /或扫描的结果满足预 定条件时, 在上述第一信道集合的信道上与上述接收站点进行与上述数据帧不 同的第一类型无线帧的收发。 上述传输单元还包括: 第二传输模块, 设置为在上述第二信道集合中的所 预约的信道上将数据帧发送给上述接收站点之前, 向上述接收站点发送指示信 息, 其中, 上述指示信息指示以下内容至少之一: 所要预约的信道带宽, 所要 预约的信道所属的信道集合。 上述传输装置还包括: 判断单元, 设置为通过以下步骤判断所检测和 /或扫 描的结果是否满足预定条件: 判断上述第一信道集合和第二信道集合中是否存 在没有千扰的信道, 或者, 存在千扰信号值小于预定阈值的信道; 若存在, 则 判断出所检测和 /或扫描的结果满足预定条件。 在本发明中 ,通过发送站点或接收站点对第一信道集合和 /或第二信道集合 进行信道检测, 判断当前是否能够使用第二信道集合中的信道进行传输, 从而 能够使得支持第二信道集合的站点在第二信道集合上传输数据帧, 增加了传输 的灵活性, 同时能够使得支持第二信道集合的站点和仅支持第一信道集合的站 点在无线网络中共同工作, 使系统具有良好的后向兼容性。 本发明的其它特征和优点将在随后的说明书中阐述, 并且, 部分地从说明 书中变得显而易见, 或者通过实施本发明而了解。 本发明的目的和其他优点可 通过在所写的说明书、 权利要求书、 以及附图中所特别指出的结构来实现和获 得。 附图说明 此处所说明的附图用来提供对本发明的进一步理解, 构成本申请的一部 分, 本发明的示意性实施例及其说明用于解释本发明, 并不构成对本发明的不 当限定。 在附图中: 图 1是根据相关技术的大带宽系统不同信道带宽组成示意图; 图 2是根据本发明实施例的 5.725GHz至 5.850GHz频段内不同信道化方法 形成的信道集合的示意图; 图 3 是才艮据本发明实施例的无线局域网中的传输方法的一种优选的流程 图; 图 4是根据本发明实施例的所检测和 /或扫描的信道集合的示意图; 图 5 是根据本发明实施例的无线局域网中的传输装置的一种优选的结构 图; 图 6是根据本发明实施例的无线局域网中的传输装置的另一种优选的结构 图。 具体实施方式 下文中将参考附图并结合实施例来详细说明本发明。 需要说明的是, 在不 冲突的情况下, 本申请中的实施例及实施例中的特征可以相互组合。 在本发明实施例中, 以 5.725GHz至 5.850GHz频段, 在该频段内釆用两种 信道化方法形成的两个信道集合为例进行说明, 第一信道集合是中心频点从 5.745GHz开始, 按照每个信道带宽为 20MHz划分, 该频段内形成 5个 20MHz 的互不交叠的信道, 最大信道带宽为 80MHz; 第二信道集合是将上述每个中心 频点向氏频点方向偏移 7.5MHz, 产生 6个互不交叠的 20MHz信道, 最大信道 带宽为 120MHz (见附图 2 )。发送站点和接收站点可以是以下之一: 接入站点, 非接入站点。 在本发明的实施例中, 以发送站点为接入站点, 接收站点为非接 入站点为例进行说明。 实施例 1 图 3 是才艮据本发明实施例的无线局域网中的传输方法的一种优选的流程 图, 其包括如下步骤:
S302,发送站点或接收站点在第一信道集合和 /或第二信道集合中的信道上 进行信道检测和 /或信道扫描;
S304, 若检测和 /或扫描的结果满足预定条件, 则所述发送站点与所述接收 站点在所述第一信道集合或所述第二信道集合的信道上交互预约消息, 其中, 所述预约消息用于预约传输所用的所述第二信道集合中的信道;
S306 , 所述发送站点在所述第二信道集合中的所预约的信道上将数据帧发 送给所述接收站点;
S308, 在收到所述数据帧后, 所述接收站点在所述第一信道集合或第二信 道集合的信道上发送对所述数据帧的确认信息。 在本优选的实施例中 ,通过对第一信道集合和 /或第二信道集合进行信道扫 描和 /或信道检测, 以判断当前是否能够使用第二信道集合中的信道传输数据 帧, 从而能够使得支持第二信道集合的站点和仅支持第一信道集合的站点在无 线网络中共同工作, 使系统具有良好的后向兼容性。 优选的, 若检测和 /或扫描的结果满足预定条件, 根据本发明实施例的无线 局域网中的传输方法还包括: 所述发送站点在所述第一信道集合的信道上与所 述接收站点进行与所述数据帧不同的第一类型无线帧的收发。 优选的, 上述第 一类型无线帧包括: 管理帧。 在本优选的实施例中, 通过在第一信道集合的信 道上收发其他类型的无线帧, 增加了系统发送的灵活性, 也便于不同站点的接 收。 优选的, 所述发送设备与所述接收设备预约传输所用的所述第二信道集合 中的信道的步骤包括: 所述发送站点与所述接收站点在所要预约的所述第二信 道集合的信道上交互所述预约消息, 或者, 所述发送站点与所述接收站点在所 述第一信道集合中的与所要预约的信道存在交叠的信道上交互所述预约消息; 其中, 所述预约消息携带有: 在所要预约的信道上进行传输所需的占用时间。 在本优选的实施例中, 通过预约信道进行传输所需的占用时间, 使得其他站点 在该时间段内不再使用上述预约的信道进行传输, 减小了碰撞, 保证了数据传 输的可靠性。 优选的, 所述发送站点在与所述接收站点交互预约消息之前, 才艮据本发明 实施例的无线局域网中的传输方法还包括: 所述发送站点在所述第一信道集合 的信道上发送用于预约传输一个或多个所述数据帧所需的时间长度的无线帧。 在本优选的实施例中, 通过预约上述时间长度, 使得收发双方可以在一段预约 的时间内发送多个数据帧, 从而增加了系统资源的利用率和灵活性。 优选的, 所述发送站点在所述第二信道集合中的所预约的信道上将数据帧 发送给所述接收站点之前, 根据本发明实施例的无线局域网中的传输方法还包 括: 所述发送站点向所述接收站点发送指示信息, 其中, 所述指示信息指示以 下内容至少之一: 所要预约的信道带宽, 所要预约的信道所属的信道集合。 在 本优选的实施例中, 通过指示信息, 使得接收站点可以明确接收信息所用的相 关信道参数, 从而实现准确地接收。 优选的, 釆用以下方式携带所述指示信息: 在所述预约消息中携带, 或者, 在所述预约消息发送前通过其他消息携带。 在本优选的实施例中, 通过不同的 消息来携带上述指示信息, 增加了本发明的灵活性。 优选的, 在上述各个优选的实施例的基础上, 可以通过以下步骤判断所述 所检测和 /或扫描的结果是否满足预定条件:判断所述第一信道集合和第二信道 集合中是否存在没有千扰的信道,或者,存在千扰信号值小于预定阈值的信道; 若存在,则判断出所检测和 /或扫描的结果满足预定条件。在本优选的实施例中, 通过上述判断步骤, 可以准确地对检测和 /或扫描的结果进行判断。 优选的, 在上述各个优选的实施例的基础上, 所述发送站点在所述第二信 道集合中的所预约的信道上将数据帧发送给所述接收站点之前, 还包括: 所述 发送站点通过信令将传输模式通知给所述接收站点,其中,所述传输模式包括: 所述发送站点与所述接收站点在所述第一信道集合或所述第二信道集合的信 道上交互预约消息, 预约传输所用信道集合中的信道; 所述发送站点与所述接 收站点在预约的信道上进行数据帧的传输, 所述接收站点收到所述数据帧后, 在第一信道集合或第二信道集合的信道上发送对所述数据帧的确认。 在本优选 的实施例中, 以通知的方式使通信双方了解即将传输的模式, 通信双方可以提 前做好传输准备, 从而保证了数据发送和接收的准确性。 优选的, 所述发送站点通过信令将传输模式通知给所述接收站点的步骤包 括: 所述发送站点在所述第一信道集合的信道上发送的管理帧中携带所述第一 信道集合和所述第二信道集合所属的频率规划类信息。 在本优选的实施例中, 以通知的方式使接收站点了解第一信道集合和所述第二信道集合的频率规划 类, 确定了传输模式以及使用的信道, 从而保证了数据接收的准确性。 优选的, 所述第一信道集合中的信道构成的信道带宽包括: 20 MHz、 40
MHz、 80MHz; 所述第二信道集合中的信道构成的信道带宽包括: 20 MHz、 40 MHz、 80 MHz、 120 MHz。 在本优选的实施例中, 限定的信道带宽符合无 线局域网的演进标准, 达到了向后兼容的目的。 优选的, 所述第一信道集合和所述第二信道集合是对同一频段釆用不同的 信道化方法所形成的信道的集合, 其中, 所述第一信道集合中的信道的中心频 点与所述第二信道集合中的信道的中心频点不同, 所述第一信道集合的信道与 第二信道集合的信道全部或部分交叠。 在本优选的实施例中, 限定的信道集合 的生成方式满足无线局域网的标准的要求。 实施例 2 本实施例描述釆用第一信道集合和第二信道集合进行帧交换序列传输的 应用方法。 帧交换序列包括数据帧、 以及与数据传输相关的控制帧, 例如信道 预约请求 /响应帧, 对数据的确认帧等, 这些帧按照收发时序关系形成序列。
AP 支持在第一信道集合和第二信道集合工作, AP 下关联了多种能力的 STA, 例如有仅支持工作在第一信道集合上的 802.11η STA,有不支持第二信道 集合的 802.11ac STA,还有支持第一和第二信道集合的 802.11ac STA, 则当 AP 工作在 20/40/80MHz时, AP与 STA在第一信道集合的信道上交互信道预约请 求 /响应帧, 进行数据帧和确认帧的传输。 控制帧是指用于对数据收发进行控制 的帧, 包括以下至少之一: 信道预约请求帧 (RTS )、 信道预约响应帧 (CTS )、 确认帧( ACK )、轮询帧( PS-Poll )、竟争期结束帧( CF-END、 CF-End+CF-Ack )、 块确认请求帧( Block ACK Request ),块确认帧( Block Ack )。此夕卜, AP与 STA 在第一信道集合的信道上还传输管理帧, 管理帧是指用于 BSS管理的帧, 与接 入过程相关的管理帧包括以下至少之一: 信标 ( Beacon )、 关联请求帧 ( Association Request )、 关联响应†贞 ( Association Response )、 重关联请求†贞 ( Reassociati on Request )、 重关联响应†贞 ( Reassociati on Response )、 去关联†贞 ( Disassociation )、侦听请求†贞 ( Probe Request )、侦听响应†贞 ( Probe Response )、 鉴权帧(Authentication ), 去鉴权帧( Deauthentication )、 部分动作帧( Action )。 数据帧是指用于传输数据的帧。
AP或者与 AP关联的非 AP的 STA对第一信道集合的 5个 20MHz的基本 信道进行信道扫描和 /或信道检测, 或者对第二信道集合的 6个 20MHz的基本 信道进行信道扫描和 /或信道检测, 当检测到第一信道集合的 5个 20MHz的基 本信道或者第二信道集合的 6个 20MHz的基本信道的千扰低于设定阈值时, 或者根据扫描结果确定第二信道集合没有千扰时, 判断第二信道集合的信道可 用, 釆用第二信道集合的 120MHz信道传输数据帧。 AP在釆用第二信道集合的 120MHz信道传输数据帧之前, 需要进行信道 预约, 具体的方法是: 在第一信道集合的 5个 20MHz的信道上交互 RTS/CTS 帧。 AP在第一信道集合的 5个 20MHz的信道上发送 RTS给 STA, STA在第 一信道集合的 5个 20MHz的信道上通过检测 RTS帧的前导 ( preamble ) ,获知 即将开始在第二信道集合的 120MHz进行数据帧传输,然后, STA在收到 RTS、 并且自己也检测为空闲的第一集信道集合的信道上回复 CTS (至少包含主信 道), 本例中, 如果第一信道集合的 5个 20MHz的信道都检测为空闲, 则在其 上都回复 CTS , 从而完成 120MHz传输的预约。 此外, AP还可以发送指示信 息给 STA,指示以下内容至少之一:所要预约的信道带宽(本例中为 120MHz ), 所要预约的信道所属的信道集合 (本例中为第二信道集合)。 上述指示信息可 以携带在 RTS帧中进行发送。 RTS/CTS交互完成后, AP与 STA在第二信道集 合的信道上传输 120MHz的数据帧, 并传输对数据帧的 ACK帧。 其中, ACK 帧可以是在第一信道集合的 5个 20MHz信道发送给 AP, 或者仅在第一信道集 合的主信道发送给 AP, 或者在第二信道集合以 120MHz的带宽发送给 AP。 或者, AP 在釆用第二信道集合的 120MHz 信道传输数据帧之前, 在 RTS/CTS帧发送前通过其他消息携带指示信息, 指示以下内容至少之一: 所要 预约的信道带宽(本例中为 120MHz ), 所要预约的信道所属的信道集合(本例 中为第二信道集合)。 例如, 发送一个设置帧, 其中包含上述指示信息。 随后 在第一信道集合的 5个 20MHz的信道上发送 CTS to self帧, 预约即将在第二 信道集合的信道上占用的时间长度, 然后, AP与 STA在第一信道集合的 5个 20MHz的信道上交互 RTS/CTS帧, 在第二信道集合的信道上传输 120MHz的 数据帧, 并传输对数据帧的 ACK帧。 其中, ACK帧可以是在第一信道集合的 5个 20MHz信道发送给 AP, 或者仅在主信道发送给 AP, 或者在第二信道集合 以 120MHz的带宽发送给 AP。 此时, CTS to self帧预约的信道占用的时间长 度可以包括多数据帧的传输时间, 即 AP与 STA之间发送多个 RTS/CTS、数据 帧、 ACK帧所需的时间。 通过上述指示方法,使得 AP和 STA都明确即将在第二集合的 120MHz进 行数据帧传输, 通过上述预约信道方法, 为即将进行的 120MHz传输预约了信 道占用时间, 使得其他 STA在该时间段内不再使用这些信道进行传输。 当数据帧在第二信道集合的 120MHz大带宽信道传输时, 控制帧第一信道 集合上传输, 保证了所有其他站点都能够接收并解析控制帧达到了信道预约的 目的; 与接入过程相关的管理帧在第一信道集合上传输, 保证了仅支持第一信 道集合的站点能够接入 AP。 通过上述工作方式, 能够使得 AP兼容多种工作在 不同信道集合下的 STA。 实施例 3 本实施例描述釆用第二信道集合进行 120MHz进行帧交换序列传输的应用 方法, 具体地, 釆用第二信道集合传输数据帧、 以及控制帧。 AP 支持在第一信道集合和第二信道集合工作, AP 下关联了多种能力的
STA, 例如有仅支持工作在第一信道集合上的 802.11η STA,有不支持第二信道 集合的 802.11ac STA,还有支持第一和第二信道集合的 802.11ac STA, 则当 AP 工作在 20/40/80MHz时, AP在第一信道集合的信道上传输控制帧、 与接入过 程相关的管理帧和数据帧。
AP, 或者与 AP关联的非 AP的 STA对第一信道集合的 5个 20MHz的基 本信道进行信道扫描和 /或信道检测, 或者对第二信道集合的 6个 20MHz的基 本信道进行信道扫描和 /或信道检测, 当检测到第一信道集合的 5个 20MHz的 基本信道或者第二信道集合的 6个 20MHz的基本信道的千扰低于设定阈值时, 或者根据扫描结果确定第二信道集合没有千扰时, 判断第二信道集合的信道可 用, 釆用第二信道集合的 120MHz信道进行帧交换序列传输。 此外, 与接入过 程相关的管理帧在第一信道集合上传输, 保证仅支持第一信道集合的站点能够 接入 AP。
AP在釆用第二信道集合的 120MHz信道传输之前, 首先发送指示信息给 STA, 指示以下内容至少之一: 所要预约的信道带宽 (本例中为 120MHz ), 所 要预约的信道所属的信道集合 (本例中为第二信道集合)。 例如, 发送一个设 置帧, 其中包含上述指示信息。 随后在第一信道集合的 5个 20MHz的信道上 发送 CTS to self帧,预约即将在第二信道集合的信道上占用的时间长度。然后, 在第二信道集合的 6个 20MHz的信道上交互 RTS/CTS帧, 在第二信道集合的 信道上传输 120MHz的数据帧,并在第二信道集合上传输对数据帧的 ACK帧。 通过上述指示方法, AP和 STA都明确即将在 120MHz进行数据帧传输。 通过上述预约信道方法, 为即将进行的 120MHz传输预约了信道占用时间, 使 得其他 STA在该时间段内不再使用这些信道进行传输。 通过上述工作方式, 能 够使得 AP兼容多种工作在不同信道集合下的 STA。 实施例 4
AP 支持在第一信道集合和第二信道集合工作, AP 下关联了多种能力的 STA, 例如有仅支持工作在第一信道集合上的 802.11η STA,有不支持第二信道 集合的 802.1 lac STA, 还有支持第一和第二信道集合的 802.1 lac STA, 则 AP 釆用以下方式工作: 当 AP工作在 20/40/80MHz时, AP在第一信道集合的信道上传输控制帧、 管理帧和数据帧, 同时, AP, 或与 AP关联的 STA对第二信道集合的信道进行 扫描 /检测, 判断第二信道集合的信道可用后, 釆用第二信道进行传输数据帧。 如图 4所示, AP对第一信道集合的信道 11、 信道 12、 信道 13进行信道 扫描和 /或信道检测, 或者对第二信道集合的信道 21、 信道 22、 信道 23、 信道 24进行信道扫描和 /或信道检测。 当检测到第一信道集合的上述三个 20MHz的 基本信道或者第二信道集合的 4个 20MHz的基本信道的千扰低于设定阈值时, 或者根据扫描结果确定第二信道集合没有千扰时, 判断第二信道集合的信道可 用,釆用第二信道集合的 4个 20MHz组成的 80MHz的大带宽信道传输数据帧。 这里, 通过对第一信道集合中与第二信道集合中的 4个信道存在交叠的 3个信 道进行扫描和 /或检测, 能够判断第二信道集合中的上述信道是否能被使用。
AP在釆用第二信道集合的 80MHz信道传输数据帧之前, 需要进行信道预 约,具体的方法是:在第一信道集合的信道 11、信道 12、信道 13上交互 RTS/CTS 帧, 或者发送 CTS to self帧。 通过上述预约信道方法, 为即将进行的 80MHz 传输预约了信道占用时间,使得其他 STA在该时间段内不再使用这些信道进行 传输。 通过上述信道预约, AP和 STA都明确即将在 80MHz进行数据帧传输, AP也可以通过发送信令的方式通知 STA将在第二信道集合的 80MHz进行数 据帧传输。 当数据帧在第二信道集合的 80MHz 大带宽信道发送时, 控制帧和与接入 过程相关的管理帧仍然在第一信道集合上传输。 通过上述工作方式,能够使得 AP兼容多种工作在不同信道集合下的 STA, 并能够充分利用多个信道集合的未被千扰信道进行传输。 实施例 5
AP 支持在第一信道集合和第二信道集合工作, AP 下关联了多种能力的 STA, 例如有仅工作在第一信道集合上的 802.11η STA,有不支持第二信道集合 的 802.1 lac STA, 还有支持第一和第二信道集合的 802.1 lac STA, 则 AP釆用 以下方式工作: 当 AP工作在 20/40/80MHz时, AP在第一信道集合的信道上传输控制帧、 管理帧和数据帧, 同时, AP, 或与 AP关联的 STA对第二信道集合的信道进行 扫描 /检测, 判断第二信道集合的信道可用后, 釆用第二信道进行传输帧交换序 列。
AP对第一信道集合的信道 11、 信道 12、 信道 13进行信道扫描和 /或信道 检测, 或者对第二信道集合的信道 21、 信道 22、 信道 23、 信道 24进行信道扫 描和 /或信道检测, 当检测到第一信道集合的上述 3个基本信道或者第二信道集 合的 4个基本信道的千扰低于设定阈值时, 或者根据扫描结果确定第二信道集 合没有千扰时, 判断第二信道集合的信道可用, 釆用第二信道集合的 80MHz 信道进行帧交换序列传输。 同实施例 3—样, 通过对第一信道集合中与第二信 道集合中的 4个信道存在交叠的 3个信道进行扫描和 /或检测 ,能够判断第二信 道集合中的上述信道是否能被使用。
AP在釆用第二信道集合的 80MHz信道传输之前, 需要进行信道预约, 具 体的方法是: 首先发送指示信息给 STA, 指示以下内容至少之一: 所要预约的 信道带宽 (本例中为 80MHz ), 所要预约的信道所属的信道集合 (本例中为第 二信道集合)。 例如, 发送一个设置帧, 其中包含上述指示信息。 随后在第一 信道集合的 3个 20MHz的信道上发送 CTS to self帧, 预约即将在第二信道集 合的信道上占用的时间长度。 然后, 在第二信道集合的 4个 20MHz的信道上 交互 RTS/CTS帧, 在第二信道集合的信道上传输 80MHz的数据帧, 并在第二 信道集合上传输对数据帧的 ACK帧。 当数据帧和相关控制帧在第二信道集合的 80MHz 大带宽信道发送时, 与 接入过程相关的管理帧仍然在第一信道集合上传输。 通过上述工作方式, 能够 使得 AP兼容多种工作在不同信道集合下的 STA。 实施例 6 本实施例是设备通知将釆用本发明描述的模式进行传输的实例。 具体实施过程中, 通知方式可以是在第一信道集合的信道上发送的管理 帧,例如 beacon帧和 probe_response帧中携带支持两个信道集合的频率规划类。 表 1给出了一个实例: 表 1 信道规划类识别号
Figure imgf000015_0001
实施例 7 图 5 是根据本发明实施例的无线局域网中的传输装置的一种优选的结构 图。 如图 5所示, 该传输装置设置在发送设备中, 其中, 该传输装置包括: 检 测单元 502 , 用于对第一信道集合和 /或第二信道集合中的信道进行信道检测和 /或信道扫描; 预约单元 504 , 与检测单元 502连接, 用于在所检测和 /或扫描的 结果满足预定条件时, 与所述接收站点在所述第一信道集合或所述第二信道集 合的信道上交互预约消息, 其中, 所述预约消息用于预约传输所用的所述第二 信道集合中的信道; 传输单元 506 , 与预约单元 504连接, 用于在所述第二信 道集合中的所预约的信道上将数据帧发送给所述接收站点, 并接收所述接收站 点对所述数据帧的确认信息。 在本优选的实施例中, 通过对第一信道集合和第二信道集合进行信道扫描 和 /或信道检测, 判断当前是否能够使用第二信道集合中的信道进行传输, 从而 能够使得支持第二信道集合的站点在第二信道集合上传输数据帧, 增加了传输 的灵活性, 同时能够使得支持第二信道集合的站点和仅支持第一信道集合的站 点在无线网络中共同工作, 使系统具有良好的后向兼容性。 优选的, 上述无线局域网中的预约单元 504用于在所述第二信道集合中的 信道上与所述接收站点进行传输之前, 与所述接收站点预约所釆用的所述第二 信道集合中的信道所占用的时间。 优选的, 如图 6所示, 所述预约单元 504包括: 第一预约模块 5041 , 用于 与所述接收站点在所要预约的所述第二信道集合的信道上交互所述预约消息, 或者, 与所述接收站点在所述第一信道集合中的与所要预约的信道存在交叠的 信道上交互所述预约消息, 其中, 所述预约消息携带有: 在所要预约的信道上 进行传输所需的占用时间。 在本优选的实施例中, 通过预约信道进行传输所需 的占用时间, 使得其他站点在该时间段内不再使用上述预约的信道进行传输, 减小了碰撞, 保证了数据传输的可靠性。 优选的, 所述预约单元 504包括: 第二预约模块 5042 , 用于在与所述接收 站点交互预约消息之前, 在所述第一信道集合的信道上发送用于预约传输一个 或多个所述数据帧所需的时间长度的无线帧。 在本优选的实施例中, 通过预约 上述时间长度, 使得收发双方可以在一段预约的时间内发送多个数据帧, 从而 增加了系统资源的利用率和灵活性。 优选的, 所述传输单元 506 包括: 第一传输模块 5061 , 用于在检测和 /或 扫描的结果满足预定条件时, 在所述第一信道集合的信道上与所述接收站点进 行与所述数据帧不同的第一类型无线帧的收发。 在本优选的实施例中, 通过在 第一信道集合中的信道上收发其他类型的无线帧, 增加了系统发送的灵活性, 也便于不同站点的接收。 优选的, 所述第一类型无线帧包括: 管理帧, 或者, 控制帧和所述管理帧。 在本优选的实施例中, 如果第一类型无线帧为管理帧, 则在第二信道集合中的 所预约的信道上发送的是控制帧和数据帧。 优选的, 所述传输单元 506还包括: 第二传输模块 5062 , 用于在所述第二 信道集合中的所预约的信道上将数据帧发送给所述接收站点之前, 向所述接收 站点发送指示信息, 其中, 所述指示信息指示以下内容至少之一: 所要预约的 信道带宽, 所要预约的信道所属的信道集合。 在本优选的实施例中, 通过指示 信息, 使得接收站点可以明确接收信息所用的相关信道参数, 从而实现准确地 接收。 优选的, 釆用以下方式携带所述指示信息: 在所述预约消息中携带, 或者, 在所述预约消息发送前通过其他消息携带。 在本优选的实施例中, 通过不同的 消息来携带上述指示信息, 增加了本发明的灵活性。 优选地, 才艮据本发明实施例的无线局域网中的传输装置还包括: 判断单元 508 , 用于通过以下步骤判断所检测和 /或扫描的结果是否满足预定条件: 判断 所述第一信道集合和第二信道集合中是否存在没有千扰的信道, 或者, 存在千 扰信号值小于预定阈值的信道; 若存在, 则判断出所检测和 /或扫描的结果满足 预定条件。 在本优选的实施例中, 通过上述判断步 4聚, 可以准确地对检测和 / 或扫描的结果进行判断。 优选的, 在上述各个优选的实施例的基础上, 传输单元 506在所述第二信 道集合中的所预约的信道上将数据帧发送给所述接收站点之前, 还包括: 传输 单元 506通过信令将传输模式通知给所述接收站点,其中,所述传输模式包括: 所述发送设备与所述接收站点在所述第一信道集合或所述第二信道集合的信 道上交互预约消息, 预约传输所用信道集合中的信道; 所述发送设备与所述接 收站点在预约的信道上进行数据帧的传输, 所述接收站点收到所述数据帧后, 在第一信道集合或第二信道集合的信道上发送对所述数据帧的确认。 在本优选 的实施例中, 以通知的方式使通信双方了解即将传输的模式, 通信双方可以提 前做好传输准备, 从而保证了数据发送和接收的准确性。 优选的, 传输单元 506通过信令将传输模式通知给所述接收站点的步骤包 括: 传输单元 506在所述第一信道集合的信道上发送的管理帧中携带所述第一 信道集合和所述第二信道集合所属的频率规划类信息。 在本优选的实施例中, 以通知的方式使接收站点了解第一信道集合和所述第二信道集合的频率规划 类, 确定了传输模式以及使用的信道, 从而保证了数据接收的准确性。 优选的, 所述第一信道集合中的信道构成的信道带宽包括: 20 MHz , 40 MHz、 80MHz; 所述第二信道集合中的信道构成的信道带宽包括: 20 MHz、 40 MHz、 80 MHz、 120 MHz。 在本优选的实施例中, 限定的信道带宽符合无 线局域网的演进标准, 达到了向后兼容的目的。 优选的, 所述第一信道集合和所述第二信道集合是对同一频段釆用不同的 信道化方法所形成的信道的集合, 其中, 所述第一信道集合中的信道的中心频 点与所述第二信道集合中的信道的中心频点不同, 所述第一信道集合的信道与 第二信道集合的信道全部或部分交叠。 在本优选的实施例中, 限定的信道集合 的生成方式满足无线局域网的标准的要求。 需要说明的是, 在附图的流程图示出的步骤可以在诸如一组计算机可执行 指令的计算机系统中执行, 并且, 虽然在流程图中示出了逻辑顺序, 但是在某 些情况下, 可以以不同于此处的顺序执行所示出或描述的步 4聚。 显然, 本领域的技术人员应该明白, 上述的本发明的各模块或各步骤可以 用通用的计算装置来实现, 它们可以集中在单个的计算装置上, 或者分布在多 个计算装置所组成的网络上, 可选地, 它们可以用计算装置可执行的程序代码 来实现, 从而, 可以将它们存储在存储装置中由计算装置来执行, 或者将它们 分别制作成各个集成电路模块, 或者将它们中的多个模块或步骤制作成单个集 成电路模块来实现。 这样, 本发明不限制于任何特定的硬件和软件结合。 以上所述仅为本发明的优选实施例而已, 并不用于限制本发明, 对于本领 域的技术人员来说, 本发明可以有各种更改和变化。 凡在本发明的 ^"神和原则 之内, 所作的任何修改、 等同替换、 改进等, 均应包含在本发明的保护范围之 内。

Claims

权 利 要 求 书
1. 一种无线局域网中的传输方法, 包括:
发送站点或接收站点在第一信道集合和 /或第二信道集合中的信道 上进行信道检测和 /或信道扫描;
若检测和 /或扫描的结果满足预定条件, 则所述发送站点与所述接收 站点在所述第一信道集合或所述第二信道集合的信道上交互预约消息, 其中, 所述预约消息用于预约传输所用的所述第二信道集合中的信道; 所述发送站点在所述第二信道集合中的所预约的信道上将数据帧发 送给所述接收站点;
在收到所述数据帧后, 所述接收站点在所述第一信道集合或第二信 道集合的信道上发送对所述数据帧的确认信息。
2. 根据权利要求 1所述的方法, 其中, 若检测和 /或扫描的结果满足预定条 件, 还包括:
所述发送站点在所述第一信道集合的信道上与所述接收站点进行与 所述数据帧不同的第一类型无线帧的收发。
3. 根据权利要求 2所述的方法, 其中, 所述第一类型无线帧包括: 管理帧。
4. 根据权利要求 1所述的方法, 其中, 所述发送设备与所述接收设备预约 传输所用的所述第二信道集合中的信道的步骤包括:
所述发送站点与所述接收站点在所要预约的所述第二信道集合的信 道上交互所述预约消息, 或者,
所述发送站点与所述接收站点在所述第一信道集合中的与所要预约 的信道存在交叠的信道上交互所述预约消息;
其中, 所述预约消息携带有: 在所要预约的信道上进行传输所需的 占用时间。
5. 根据权利要求 1所述的方法, 其中, 所述发送站点在与所述接收站点交 互预约消息之前, 还包括: 所述发送站点在所述第一信道集合的信道上发送用于预约传输一个 或多个所述数据帧所需的时间长度的无线帧。
6. 根据权利要求 1所述的方法, 其中, 所述发送站点在所述第二信道集合 中的所预约的信道上将数据帧发送给所述接收站点之前, 还包括:
所述发送站点向所述接收站点发送指示信息, 其中, 所述指示信息 指示以下内容至少之一: 所要预约的信道带宽, 所要预约的信道所属的 信道集合。
7. 根据权利要求 6所述的方法, 其中, 釆用以下方式携带所述指示信息: 在所述预约消息中携带, 或者, 在所述预约消息发送前通过其他消 息携带。
8. 根据权利要求 1 所述的方法, 其中, 通过以下步骤判断所述所检测和 / 或扫描的结果是否满足预定条件:
判断所述第一信道集合和第二信道集合中是否存在没有千扰的信 道, 或者, 存在千扰信号值小于预定阈值的信道;
若存在, 则判断出所检测和 /或扫描的结果满足预定条件。
9. 根据权利要求 1所述的方法, 其中, 所述发送站点在所述第二信道集合 中的所预约的信道上将数据帧发送给所述接收站点之前, 还包括:
所述发送站点通过信令将传输模式通知给所述接收站点, 其中, 所 述传输模式包括: 所述发送站点与所述接收站点在所述第一信道集合或 所述第二信道集合的信道上交互预约消息, 预约传输所用信道集合中的 信道;所述发送站点与所述接收站点在预约的信道上进行数据帧的传输, 所述接收站点收到所述数据帧后, 在第一信道集合或第二信道集合的信 道上发送对所述数据帧的确认。
10. 根据权利要求 9所述的方法, 其中, 所述发送站点通过信令将传输模式 通知给所述接收站点的步骤包括:
所述发送站点在所述第一信道集合的信道上发送的管理帧中携带所 述第一信道集合和所述第二信道集合所属的频率规划类信息。
11. 根据权利要求 1所述的方法, 其中, 所述第一信道集合中的信道构成的 信道带宽包括: 20 MHz、 40 MHz、 80MHz; 所述第二信道集合中的信 道构成的信道带宽包括: 20 MHz, 40 MHz, 80 MHz、 120 MHz。
12. 根据权利要求 1所述的方法, 其中, 所述第一信道集合和所述第二信道 集合是对同一频段釆用不同的信道化方法所形成的信道的集合, 其中, 所述第一信道集合中的信道的中心频点与所述第二信道集合中的信道的 中心频点不同, 所述第一信道集合的信道与第二信道集合的信道全部或 部分交叠。
13. —种无线局域网中的传输装置, 设置在发送设备中, 包括:
检测单元, 设置为对第一信道集合和 /或第二信道集合中的信道进行 信道检测和 /或信道扫描;
预约单元, 设置为在所检测和 /或扫描的结果满足预定条件时, 与所 述接收站点在所述第一信道集合或所述第二信道集合的信道上交互预约 消息, 其中, 所述预约消息用于预约传输所用的所述第二信道集合中的 信道;
传输单元, 设置为在所述第二信道集合中的所预约的信道上将数据 帧发送给所述接收站点,并接收所述接收站点对所述数据帧的确认信息。
14. 根据权利要求 13所述的装置, 其中, 所述预约单元包括:
第一预约模块, 设置为与所述接收站点在所要预约的所述第二信道 集合的信道上交互所述预约消息, 或者, 与所述接收站点在所述第一信 道集合中的与所要预约的信道存在交叠的信道上交互所述预约消息, 其 中, 所述预约消息携带有: 在所要预约的信道进行传输所需的占用时间。
15. 根据权利要求 13所述的装置, 其中, 所述预约单元包括:
第二预约模块, 设置为在与所述接收站点交互预约消息之前, 在所 述第一信道集合的信道上发送用于预约传输一个或多个所述数据帧所需 的时间长度的无线帧。 根据权利要求 13所述的装置, 其中, 所述传输单元包括: 第一传输模块, 设置为在检测和 /或扫描的结果满足预定条件时, 在 所述第一信道集合的信道上与所述接收站点进行与所述数据帧不同的第 一类型无线帧的收发。
17. 根据权利要求 13所述的装置, 其中, 所述传输单元还包括:
第二传输模块, 设置为在所述第二信道集合中的所预约的信道上将 数据帧发送给所述接收站点之前, 向所述接收站点发送指示信息, 其中, 所述指示信息指示以下内容至少之一: 所要预约的信道带宽, 所要预约 的信道所属的信道集合。
18. 根据权利要求 13所述的装置, 其中, 还包括: 判断单元, 设置为通过以 下步骤判断所检测和 /或扫描的结果是否满足预定条件:
判断所述第一信道集合和第二信道集合中是否存在没有千扰的信 道, 或者, 存在千扰信号值小于预定阈值的信道;
若存在, 则判断出所检测和 /或扫描的结果满足预定条件。
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