WO2014121615A1 - 数据传输方法、装置和*** - Google Patents

数据传输方法、装置和*** Download PDF

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Publication number
WO2014121615A1
WO2014121615A1 PCT/CN2013/083940 CN2013083940W WO2014121615A1 WO 2014121615 A1 WO2014121615 A1 WO 2014121615A1 CN 2013083940 W CN2013083940 W CN 2013083940W WO 2014121615 A1 WO2014121615 A1 WO 2014121615A1
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WO
WIPO (PCT)
Prior art keywords
site
frame
station
occupied
data
Prior art date
Application number
PCT/CN2013/083940
Other languages
English (en)
French (fr)
Inventor
李云波
伍天宇
罗毅
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 JP2015556372A priority Critical patent/JP6440126B2/ja
Priority to EP13874761.3A priority patent/EP2945455B1/en
Publication of WO2014121615A1 publication Critical patent/WO2014121615A1/zh
Priority to US14/818,016 priority patent/US9801205B2/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters
    • H04W28/20—Negotiating bandwidth
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]

Definitions

  • Embodiments of the present invention relate to communication technologies, and in particular, to a data transmission method, apparatus, and system. Background technique
  • WLAN wireless local access network
  • AP access Point
  • STA stations
  • the old format is transmitted, and the old STA can communicate normally under the new AP.
  • OFDM orthogonal frequency division multiplexing
  • the bandwidth gradually becomes larger.
  • IEEE 802.1 la the bandwidth was 20MHz, and the bandwidth in IEEE 802.1 In was extended to 40MHz.
  • IEEE 802.1 lac the bandwidth was further extended to 80MHz and 160MHz (80+80 ⁇ ), which may be adopted in the future WLAN standard.
  • Communication bandwidth The network is upgraded to apply new standards. In the process of upgrading, it is generally compatible with the original equipment.
  • the old site is a historical inventory site, which is the site before the network upgrade, and supports pre-upgrade standards such as IEEE 802.11 ⁇ .
  • the new site is a new site. It is a site deployed after the network upgrade. It supports two standards before and after the upgrade. For example, it supports both IEEE 802.11 ⁇ and IEEE 802.1 lac.
  • the embodiment of the invention provides a data transmission method, device and system, which implements uplink OFDMA data transmission in a compatible mode, and solves the problem of bandwidth waste caused by data transmission in a historical inventory site.
  • an embodiment of the present invention provides a data transmission method, including:
  • Data is transmitted on the channel including the primary channel and causes the new station to transmit data on the secondary channel that is not occupied by the historical inventory site according to the indication frame.
  • the sending to the historical inventory site and the newly added site, an indication frame, so that the historical inventory site includes the primary channel according to the indication frame.
  • the sending the indication frame to the historical inventory site and the newly added site, so that the historical inventory site is according to the indication frame Transmitting data on a channel including the primary channel, and causing the new station to send data on a secondary channel that is not occupied by the historical inventory site according to the indication frame, including:
  • the adding the site scheduling indication information includes:
  • the ID of the new site to be scheduled or,
  • the completion of the historical inventory site and the new site After the data is sent also includes:
  • the indication frame and/or the acknowledgement frame are transmitted in an OFDMA manner.
  • the indication frame further includes the historical inventory The bandwidth occupied by the site and the length of time reserved, and/or the bandwidth and transmission duration that the new site can use.
  • an embodiment of the present invention provides a data transmission method, including:
  • the receiving the indication frame sent by the access point And transmitting, according to the indication frame, the data that is sent on the secondary channel that is not occupied by the historical inventory site, including: receiving a scheduling frame that is sent by the access point on a secondary channel that is not occupied by the historical inventory station; Data is sent on the secondary channel that is not occupied by the historical inventory site.
  • the receiving access point sends a scheduling frame on a secondary channel that is not occupied by the historical inventory site, Transmitting data according to the scheduling frame on a secondary channel that is not occupied by the historical inventory site, including:
  • a scheduling frame that includes an identifier of a newly added station that is sent on a secondary channel that is not occupied by the historical inventory site, and determines, according to the identifier, that the scheduled channel is not occupied by the historical inventory site.
  • Send data or,
  • the receiving the information that is sent by the access point, and sending the data on the secondary channel that is not occupied by the historical inventory station according to the indication frame includes:
  • the adding the site scheduling indication information includes:
  • the ID of the new site to be scheduled or,
  • Transmitting the data on the secondary channel that is not occupied by the historical inventory site according to the indication frame includes: transmitting, by using the OFDMA method, the secondary channel that is not occupied by the historical inventory site according to the indication frame Send data.
  • the indication frame further includes the historical inventory The bandwidth occupied by the site and the length of time reserved, and/or the bandwidth and transmission duration that the new site can use;
  • the method Before the sending of the data on the secondary channel that is not occupied by the historical inventory site according to the indication frame, the method includes:
  • Parsing the indication frame obtaining a bandwidth occupied by the historical inventory site and a reserved time length, and/or a bandwidth and a transmission duration that the new site can use;
  • the present invention provides a data transmission method, including:
  • the data is transmitted on the secondary channel that is not occupied by the historical inventory site, and the end time of the transmission data cannot exceed the transmission end time of the historical inventory site.
  • the present invention provides a data transmission apparatus, including:
  • a receiving module configured to receive a sending request RTS frame sent by a historical inventory station on a channel including a primary channel
  • a sending module configured to send an indication frame to the historical inventory station and the newly added station, so that the historical inventory station sends data according to the indication frame on a channel including the primary channel, and adds the new The station transmits data according to the indication frame on a secondary channel that is not occupied by the historical inventory site.
  • the sending module includes:
  • a first sending unit configured to go to the historical storage station on a channel including the primary channel Point transmitting an unblocked CTS frame to cause the historical inventory station to transmit data on a channel including the primary channel according to the CTS frame;
  • a second sending unit configured to send, to the new station, a scheduling frame on a secondary channel that is not occupied by the historical inventory station, so that the newly added station is not occupied by the historical inventory site according to the scheduling frame.
  • the data is transmitted on the secondary channel.
  • the second sending unit is specifically configured to:
  • the sending module is specifically configured to:
  • the ID of the new site to be scheduled or,
  • the sending module is further configured to:
  • the indication frame and/or the acknowledgement frame are transmitted in an OFDMA manner.
  • the indication frame further includes the historical inventory The bandwidth occupied by the site and the length of time reserved, and/or the bandwidth and transmission duration that the new site can use.
  • a fifth aspect of the present invention provides a data transmission apparatus, including:
  • a receiving module configured to receive an indication frame sent by the access point
  • a sending module configured to send data according to the indication frame on a secondary channel that is not occupied by the historical inventory station.
  • the receiving module is specifically configured to receive a scheduling frame that is sent by the access point on a secondary channel that is not occupied by the historical inventory station;
  • the sending module is specifically configured to send data according to the scheduling frame on a secondary channel that is not occupied by the historical inventory site.
  • the receiving module is specifically configured to receive, that the access point is not occupied by the historical inventory site a scheduling frame sent on the channel containing the identity of the newly added station;
  • the sending module is specifically configured to: after being determined according to the identifier, send data on a secondary channel that is not occupied by the historical inventory site after being scheduled; or
  • the receiving module is specifically configured to receive, by the access point, a scheduling frame that includes an identifier of a schedulable group of newly added sites;
  • the sending module is specifically configured to send data on a secondary channel that is not occupied by the historical inventory site according to a data transmission requirement.
  • the receiving module is specifically configured to receive, by the access point, a new site scheduling that is sent on a channel that includes the primary channel a CTS frame indicating the information;
  • the sending module is specifically configured to send data according to the CTS frame on a secondary channel that is not occupied by the historical inventory site.
  • the adding the new station scheduling indication information includes:
  • the ID of the new site to be scheduled or,
  • the receiving module is further configured to And indicating, after the data is sent on the secondary channel that is not occupied by the historical inventory site, the second acknowledgement frame sent by the access point on the secondary channel that is not occupied by the historical inventory site, the indication frame and/or The second acknowledgement frame is transmitted by using an OFDMA method;
  • the sending module is specifically configured to send data in an OFDMA manner on a secondary channel that is not occupied by the historical inventory station according to the indication frame.
  • the indication frame further includes the historical inventory The bandwidth occupied by the site and the length of time reserved, and/or the bandwidth and transmission duration that the new site can use;
  • the device also includes:
  • a parsing module configured to parse the indication frame to obtain a bandwidth occupied by the historical inventory site and a reserved time before sending the data on the secondary channel that is not occupied by the historical inventory site according to the indication frame a length, and/or a bandwidth that can be used by the new site and a transmission duration;
  • the sending module is specifically configured to use the bandwidth occupied by the historical storage site and the reserved time length, and/or The bandwidth and transmission duration that can be used by the new site are transmitted on the secondary channel that is not occupied by the historical inventory site.
  • an embodiment of the present invention provides a data transmission apparatus, including:
  • a monitoring module configured to listen to data frames sent by the historical inventory station
  • a parsing module configured to parse a data frame frame header sent by the historical inventory station to learn a transmission bandwidth and a transmission duration of the historical inventory site;
  • the embodiment of the present invention provides a data transmission system, comprising the data transmission device according to any one of the seventh aspect to the seventh aspect, and the fifth aspect to the sixth aspect A data transmission device according to any of the preceding claims.
  • the data transmission method, apparatus, and system provided by the embodiment of the present invention receive an RTS frame sent by a historical inventory station on a channel including a primary channel, and send an indication frame to a historical inventory station and a newly added station, thereby making a historical inventory.
  • the station transmits data according to the indication frame on the channel including the primary channel and causes the new station to transmit data according to the indication frame on the secondary channel that is not occupied by the historical inventory site.
  • Embodiment 1 is a flowchart of Embodiment 1 of a data transmission method according to the present invention
  • FIG. 2 is a schematic diagram of a MAC structure of a CTS frame in the first embodiment of the data transmission method according to the present invention
  • FIG. 3 is a schematic structural diagram of a frame control field in a MAC structure of a CTS frame according to Embodiment 1 of the data transmission method of the present invention
  • FIG. 4 is a schematic structural diagram of a service field in a MAC structure of a CTS frame in Embodiment 1 of a data transmission method according to the present invention
  • FIG. 5 is a flowchart of Embodiment 2 of a data transmission method according to the present invention.
  • FIG. 6 is a flowchart of Embodiment 3 of a data transmission method according to the present invention.
  • FIG. 7 is a flowchart of Embodiment 4 of a data transmission method according to the present invention.
  • Embodiment 8 is a schematic structural diagram of Embodiment 1 of a data transmission device according to the present invention.
  • Embodiment 9 is a schematic structural diagram of Embodiment 2 of a data transmission apparatus according to the present invention.
  • Embodiment 3 of a data transmission apparatus according to the present invention.
  • Embodiment 4 of a data transmission apparatus according to the present invention.
  • Embodiment 5 of a data transmission apparatus according to the present invention.
  • FIG. 13 is a schematic structural diagram of Embodiment 6 of a data transmission apparatus according to the present invention
  • FIG. 14 is a schematic structural diagram of Embodiment 7 of a data transmission apparatus according to the present invention.
  • Embodiment 8 of a data transmission apparatus according to the present invention.
  • FIG. 16 is a schematic structural diagram of Embodiment 9 of a data transmission apparatus according to the present invention.
  • the technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention.
  • the embodiments are a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.
  • Embodiment 1 is a flowchart of Embodiment 1 of a data transmission method according to the present invention.
  • the method in this embodiment is applicable to uplink multi-site OFDMA data transmission in a compatible mode.
  • an access point is used as an execution entity as an example.
  • the method of this embodiment may include:
  • RTS Request To Send
  • the access point receives a request to send (Request To Send, RTS) frame sent by the historical inventory station on the channel including the primary channel, and the historical inventory site generally includes the primary channel by means of competition.
  • the RTS frame is sent on the channel.
  • RTS frame and the Clear to send (CTS) frame to be described below refer to a channel reservation mechanism in the wireless local area network (WLAN). Mechanisms can be initiated by the AP as well as by the site.
  • NAV Network Allocation Vector
  • the non-target user receives the RTS frame after the NAV. No data is allowed to be sent even if the channel is idle during the time.
  • the time from the start of the RTS frame transmission to the end of the NAV setting is called a transmission opportunity (abbreviation: ⁇ ).
  • ⁇ transmission opportunity
  • the access target user After the access target user receives the RTS frame, it will respond to the CTS frame in the Duration field of the CTS frame.
  • the NAV will be set according to the NAV in the RTS frame, and the NAV of the CTS will be set to the end of the TXOP.
  • Non-target users that receive the CTS are not allowed to send any data during the TXOP time even if the channel is idle.
  • the access point sends an indication frame to the historical inventory station and the newly added station, so that the historical inventory station sends data according to the indication frame on the channel including the primary channel, and the new station is not occupied according to the indication frame at the historical inventory site.
  • the access point transmits a CTS frame to a historical inventory station on a channel including the primary channel, so that the historical inventory station transmits data on the channel including the primary channel according to the CTS frame;
  • the access point sends a scheduling frame to the newly added station on the secondary channel that is not occupied by the historical inventory station, so that the newly added station sends data according to the scheduling frame on the secondary channel that is not occupied by the historical inventory station.
  • the access point sends a scheduling frame to the newly added station on the secondary channel that is not occupied by the historical inventory site.
  • One is that the access point adds to the new site on the secondary channel that is not occupied by the historical inventory site.
  • the AP determines the situation when some stations have data to send according to the feedback information or service rules of the site; the other is that the access point sends a scheduling frame containing the identifier of a set of newly added stations to the newly added site, to A group of newly added stations transmits data on the secondary channel that is not occupied by the historical inventory site according to the data transmission requirement. This can be used, for example, when the AP does not have the exact information of the site to transmit the packet or broadcast to all sites.
  • the access point sends a CTS frame including the newly added station scheduling indication information to the historical inventory station and the newly added station on the channel including the primary channel, so that the historical inventory station is in accordance with the CTS frame.
  • the data is transmitted on the channel including the primary channel and the new station transmits data on the secondary channel that is not occupied by the historical inventory site according to the CTS frame.
  • the newly added station only needs to listen to the data sent by the primary channel, which is more conducive to saving power and is simpler to implement.
  • FIG. 2 is a schematic diagram of the MAC structure of the CTS frame in the first embodiment of the data transmission method according to the present invention, as shown in FIG. 2: a frame control field, a duration field. , Receiver Address (RA) field, Frame Check Sequence (FCS) field.
  • RA Receiver Address
  • FCS Frame Check Sequence
  • FIG. 3 is a frame control field in a MAC structure of a CTS frame in Embodiment 1 of a data transmission method according to the present invention
  • All or part of the bits B8 to B15 in the frame control field in the CTS frame are multiplexable, and can be used to indicate scheduling of the newly added station.
  • FIG. 4 is a schematic structural diagram of a service field in a MAC structure of a CTS frame according to Embodiment 1 of the data transmission method of the present invention, as shown in FIG.
  • the field includes a total of 16 bits, of which the first 7 bits are Scrambler Initialization bits and the last 9 bits are Reserved bits.
  • B7 B15 is a reserved bit, and all or part of the reserved bits can be used to indicate the scheduling of the new site.
  • the reserved bits in the preamble of the physical layer or the multiplexable bits can also be used to indicate the scheduling of the newly added station.
  • the information bits carried by the existing CTS frame by scrambling or the like can also be used to indicate the pair. New site scheduling.
  • the new station scheduling indication information includes: an identifier of the newly added station to be scheduled; or an identifier of a group of newly added stations that can be scheduled; or, indicating indication status information of the identifier bit.
  • the common site identification method is a MAC address (48 bits) or an associated identifier (16 bits). This is resolved by redefining the scheduling identity or grouping associated with the site when the available bits are insufficient. For example, when only 6 bits are available, a maximum of 64 stations can be assigned a scheduling identifier, and only the station to which the scheduling identifier is assigned can participate in OFDMA scheduling. It is also possible to schedule with a partial site identifier, for example using a MAC address or the last 6 bits of the associated identity.
  • the backoff mechanism can be further introduced to reduce the probability of collision.
  • the backoff mechanism is performed on the secondary channel that is not occupied by the historical inventory site, if the RF filter on the old channel is not steep enough to cause the neighboring band energy leakage to be large, frequency domain detection is needed on the secondary channel to determine whether the secondary channel is idle. . That is, the receiving channel is first converted to the frequency domain, and then the signal strength at the frequency point corresponding to each carrier on the secondary channel is detected. When the signal strength exceeds a certain threshold, it indicates that the secondary channel is busy, otherwise the secondary channel is idle.
  • the indication status information is used to indicate whether the new station transmits data on the channel including the primary channel according to the CTS frame at the historical inventory station. Data is transmitted on the secondary channel that is not occupied by the historical inventory site according to the CTS frame. For example, when the indication flag is 0, the new station does not send data on the secondary channel that is not occupied by the historical inventory site according to the CTS frame if the historical inventory station transmits data according to the CTS frame on the channel including the primary channel; When the flag is 1, the new station sends data on the secondary channel that is not occupied by the historical inventory site according to the CTS frame when the historical inventory station transmits data according to the CTS frame on the channel including the primary channel. The station can compete for data transmission on the same channel.
  • the indication frame also includes the bandwidth occupied by the historical inventory site and the length of time reserved, and/or the bandwidth and transmission duration that the new site can use.
  • the method further includes: sending, to the historical inventory station, a first acknowledgement frame on the channel including the primary channel, where the first acknowledgement frame includes information indicating whether the data of the historical inventory site is correctly transmitted, and is not occupied by the historical inventory site.
  • a second acknowledgement frame is sent to the new station on the secondary channel, and the second acknowledgement frame includes information indicating whether the data of the newly added station is correctly transmitted.
  • the indication frame and/or the acknowledgement frame are transmitted in the OFDMA mode.
  • the form of the acknowledgement frame here depends on the manner in which the data is transmitted, and may include different acknowledgement frame formats such as a response message (Acknowledgement, ACK for short) and a block acknowledgement (Block Acknowledgement, abbreviated as BA).
  • the acknowledgment frame can adopt the downlink OFDMA transmission mode, that is, the acknowledgment frame is sent to the historical inventory station on the channel including the main channel, and the acknowledgment frame is sent to the new station on the secondary channel not occupied by the historical inventory station.
  • Other multi-site confirmation methods other than this can also be applied to this embodiment.
  • the time-sharing method sends an acknowledgement frame to the historical inventory site and the new site respectively; when replying to the confirmation frame of the historical inventory site, the reserved bits in the historical inventory site confirmation frame indicate whether the newly added site data is correctly transmitted.
  • the AP receives the transmission request RTS frame sent by the historical inventory station on the channel including the primary channel, and sends an indication frame to the historical inventory station and the newly added station, so that the historical inventory station according to the indication frame Data is transmitted on the channel including the primary channel and the new station transmits data on the secondary channel that is not occupied by the historical inventory site according to the indication frame.
  • the uplink OFDMA data transmission in the compatibility mode solves the problem of bandwidth waste caused by data transmission in the historical inventory site.
  • FIG. 5 is a flowchart of Embodiment 2 of a data transmission method according to the present invention.
  • the method in this embodiment is applicable to uplink multi-site OFDMA data transmission in a compatible mode.
  • a new site is used as an execution entity as an example.
  • the method in this embodiment may include:
  • the new station After the new station receives the indication frame sent by the access point, according to the indication frame, the data is sent on the secondary channel that is not occupied by the historical inventory site.
  • the data is sent on the secondary channel that is not occupied by the historical inventory site.
  • the newly added station receives a scheduling frame sent by the access point on the secondary channel that is not occupied by the historical inventory station, and sends data according to the scheduling frame on the secondary channel that is not occupied by the historical inventory station.
  • the new station receives the scheduling frame sent by the access point on the secondary channel that is not occupied by the historical inventory station.
  • the new station receives a scheduling frame that includes an identifier of the newly added station that is sent by the access point on the secondary channel that is not occupied by the historical inventory station, and determines that the data is sent on the secondary channel that is not occupied by the historical inventory station after being determined according to the identifier.
  • the situation can be used, for example, when the AP determines that some sites have data to send according to the feedback information of the site or the service law; the other is that the newly added site receives the set of newly added sites sent by the access point and includes a schedulable group.
  • the identified scheduling frame transmits data on the secondary channel that is not occupied by the historical inventory site according to the data transmission requirement. This case can be used, for example, when the AP does not have the exact information of the site to transmit the packet or broadcast to all sites.
  • the newly added station receives the CTS frame that is sent by the access point on the channel including the primary channel and includes the new station scheduling indication information, and the secondary channel that is not occupied by the historical inventory site according to the CTS frame. Send data on.
  • the newly added station compared with the previous embodiment, only needs to listen to the data sent by the primary channel, which is more conducive to saving power and is simpler to implement.
  • the newly added site scheduling indication information includes: an identifier of the newly added station to be scheduled; or an identifier of a group of newly added stations that can be scheduled; or, indicating indication status information of the identifier bit.
  • the new station scheduling indication information includes the indication status information indicating the identification bit
  • the indication status information is used to indicate whether the new station transmits data on the channel including the primary channel according to the CTS frame at the historical inventory station. According to the CTS frame on the secondary channel not occupied by the historical inventory site send data.
  • the new station does not send data on the secondary channel that is not occupied by the historical inventory site according to the CTS frame if the historical inventory station transmits data according to the CTS frame on the channel including the primary channel;
  • the flag is 1
  • the new station sends data on the secondary channel that is not occupied by the historical inventory site according to the CTS frame when the historical inventory station transmits data according to the CTS frame on the channel including the primary channel.
  • the station can compete for data transmission on the same channel.
  • the indication frame further includes the bandwidth occupied by the historical inventory site and the reserved time length, and/or the bandwidth and transmission that can be used by the new site. duration.
  • the newly added station parses the indication frame according to the indication frame before sending data on the secondary channel that is not occupied by the historical inventory site, and obtains the bandwidth occupied by the historical inventory site and the reserved time length, and/or, adding a new site.
  • the bandwidth and transmission duration that can be used, and then according to the bandwidth occupied by the acquired historical inventory site and the length of time reserved, and/or the bandwidth and transmission duration that can be used by the new site are on the secondary channel not occupied by the historical inventory site. send data.
  • the bandwidth occupied by the historical inventory site and the reserved time length can be obtained by parsing the CTS frame, and/or the bandwidth and transmission that can be used by the new site. duration.
  • the new site can initiate data transmission on the secondary channel that is not occupied by the historical inventory site.
  • the method further includes:
  • the newly added station uses the OFDMA method to transmit data according to the indication frame on the secondary channel that is not occupied by the historical inventory station, and the OFDMA method for transmitting data can reduce the interference of the data transmission to the historical inventory site.
  • the station since a plurality of newly added sites may initiate competition on the same channel, collisions may occur, and some mechanisms may be employed to reduce the probability of collision. For example, if a new station needs to roll back before sending data on the secondary channel, if there are already other stations transmitting data on the secondary channel before rolling back to 0, the station cannot send data on the secondary channel. When the site needs to be retired before sending, it needs to keep the OFDM symbol alignment with the data of the historical inventory site when sending the data frame, and the error of the two does not exceed the length of the cyclic prefix.
  • the secondary channel is divided into a plurality of subchannels, and each of the newly added stations randomly selects one or more of them for data transmission. Again For example, to group sites, only new sites that are not in the same group as the historical inventory site can send data.
  • the above mechanism for reducing collisions can also be used in combination, and embodiments of the present invention are not limited thereto.
  • the newly added station when it sends data, it needs to use OFDMA to transmit, so as to avoid the data transmission of the newly added station from causing interference to the data of the historical inventory site. Since the historical inventory site does not support the OFDMA transmission mode, the interference to the new site will be large. At this time, the data transmission of the new site can adopt a more robust transmission mode, such as a low-order modulation coding scheme (Modulation and coding scheme). , MCS), to lower the packet error rate.
  • MCS modulation coding scheme
  • the newly added station receives the indication frame sent by the access point, and can transmit data according to the indication frame on the secondary channel that is not occupied by the historical inventory station, thereby implementing uplink OFDMA data transmission in the compatibility mode. It solves the problem of bandwidth waste caused by data transmission in historical stock sites.
  • FIG. 6 is a flowchart of Embodiment 3 of a data transmission method according to the present invention.
  • the data sent by the new site monitoring historical inventory station is used as an example to describe the transmission bandwidth and the transmission duration of the learned historical inventory site, for example.
  • the method in this embodiment may include:
  • the specific transmission bandwidth and the transmission duration are usually indicated in the Bandwidth (BW) field and the Length field of the physical layer header respectively.
  • the data frame sent by the historical site is monitored by the new station, and the data frame frame header sent by the historical inventory station is used to learn the transmission bandwidth and the transmission duration of the historical inventory site, according to the learned historical inventory site.
  • the transmission bandwidth and the transmission duration are transmitted on the secondary channel that is not occupied by the historical inventory station, and the uplink OFDMA data transmission in the compatibility mode is realized, which solves the problem of bandwidth waste caused by the historical storage site data transmission.
  • FIG. 7 is a flowchart of Embodiment 4 of a data transmission method according to the present invention, where the embodiment receives an access point. After the RTS frame is sent to the historical inventory site and the newly added site, the information is sent to the historical inventory site and the newly added site. The historical inventory site and the newly added site send data according to the indication frame as an example. As shown in FIG. 7, the method in this embodiment may include:
  • the access point receives a transmission request RTS frame sent by the historical inventory station on a channel including the primary channel.
  • the access point receives the historical inventory station to send the RTS frame on the channel including the primary channel by means of contention.
  • the access point sends an indication frame to the historical inventory site and the newly added site.
  • the access point After receiving the RTS frame, the access point sends the indication frame to the historical inventory station and the newly added station. There are two ways to implement:
  • the access point sends a scheduling frame to the newly added station on the secondary channel that is not occupied by the historical inventory site.
  • the access point sends a scheduling frame to the newly added station on the secondary channel that is not occupied by the historical inventory site.
  • One is that the access point adds to the new site on the secondary channel that is not occupied by the historical inventory site.
  • Sending a scheduling frame containing the identifier of the newly added site which can be used, for example, when the AP determines that some sites have data to send according to the feedback information of the site or the service law; the other is that the access point adds
  • the station sends a scheduling frame containing the identity of a schedulable set of new stations, which can be used, for example, when the AP does not have the exact information to be sent by the station, or when it is broadcast to all stations.
  • the access point sends a CTS frame containing the new station scheduling indication information to the historical inventory station and the newly added station on the channel including the primary channel.
  • the new station scheduling indication information includes: an identifier of the newly added station to be scheduled; or an identifier of a group of newly added stations that can be scheduled; or, indicating indication status information of the identifier bit.
  • the indication status information is used to indicate whether the new station transmits data on the channel including the primary channel according to the CTS frame at the historical inventory station. Data is transmitted on the secondary channel that is not occupied by the historical inventory site according to the CTS frame. For example, when the indication flag is 0, the new station does not send data on the secondary channel that is not occupied by the historical inventory site according to the CTS frame if the historical inventory station transmits data according to the CTS frame on the channel including the primary channel; When the flag is 1, the new station sends data on the secondary channel that is not occupied by the historical inventory site according to the CTS frame when the historical inventory station transmits data according to the CTS frame on the channel including the primary channel. Sites can be sent on the same channel Data.
  • the indication frame also includes the bandwidth occupied by the historical inventory site and the length of time reserved, and/or the bandwidth and transmission duration that the new site can use.
  • the historical inventory station sends data on the channel including the primary channel according to the indication frame.
  • the newly added station sends data according to the indication frame on a secondary channel that is not occupied by the historical inventory site. Wherein, corresponding to S602, the newly added station sends data according to the indication frame on the secondary channel that is not occupied by the historical inventory site, and there are two implementable manners:
  • the new station receives the scheduling frame sent by the access point on the secondary channel that is not occupied by the historical inventory station, and sends data according to the scheduling frame on the secondary channel that is not occupied by the historical inventory station.
  • two possible implementation manners are downstream.
  • the new station receives the scheduling frame of the newly added station that is sent by the access point on the secondary channel that is not occupied by the historical inventory station, and is determined according to the identifier.
  • the data is sent on the secondary channel that is not occupied by the historical inventory site. This can be used, for example, when the AP knows that some stations have data to send according to the feedback information or service rules of the site; the other is to add a new station.
  • the newly added station receives the CTS frame sent by the access point on the channel including the primary channel and includes the new station scheduling indication information, and sends the data according to the CTS frame on the secondary channel that is not occupied by the historical inventory station.
  • the newly added station only needs to listen to the data sent by the main channel, which is more conducive to saving power and simpler to implement.
  • the newly added site scheduling indication information includes: an identifier of the newly added station to be scheduled; or an identifier of a group of newly added stations that can be scheduled; or, indicating indication status information of the identifier bit.
  • the indication status information is used to indicate whether the new station transmits data on the channel including the primary channel according to the CTS frame at the historical inventory station. Data is transmitted on the secondary channel that is not occupied by the historical inventory site according to the CTS frame.
  • the new station does not send data on the secondary channel that is not occupied by the historical inventory site according to the CTS frame if the historical inventory station transmits data according to the CTS frame on the channel including the primary channel;
  • the flag is 1
  • the new station sends data on the secondary channel that is not occupied by the historical inventory site according to the CTS frame when the historical inventory station transmits data according to the CTS frame on the channel including the primary channel.
  • Sites can be sent on the same channel Data.
  • the indication frame also includes the bandwidth occupied by the historical inventory site and the reserved time length, and/or the bandwidth and transmission duration that the new site can use.
  • the newly added station parses the indication frame according to the indication frame before sending data on the secondary channel that is not occupied by the historical inventory site, and obtains the bandwidth occupied by the historical inventory site and the reserved time length, and/or, adding a new site.
  • the bandwidth and transmission duration that can be used, and then according to the bandwidth occupied by the acquired historical inventory site and the length of time reserved, and/or the bandwidth and transmission duration that can be used by the new site are on the secondary channel not occupied by the historical inventory site. send data.
  • the bandwidth occupied by the historical inventory site and the reserved time length can be obtained by parsing the CTS frame, and/or the bandwidth and transmission that can be used by the new site. duration.
  • the new site can initiate data transmission on the secondary channel that is not occupied by the historical inventory site.
  • the access point sends a first acknowledgement frame to the historical inventory station on the channel including the primary channel, and sends a second acknowledgement frame to the newly added station on the secondary channel that is not occupied by the historical inventory site.
  • the first confirmation frame includes information for indicating whether the data of the historical inventory station is correctly transmitted
  • the second confirmation frame includes information for indicating whether the data of the newly added station is correctly transmitted
  • the indication frame and/or the confirmation frame are adopted.
  • the acknowledgment frame contains information indicating whether the data of the newly added station is correctly transmitted.
  • the form of the acknowledgment frame depends on the manner in which the data is transmitted, and may include an acknowledgement message (Acknowledgement, ACK for short) and a block acknowledgment (block Acknowledgement). , abbreviated as: BA) and other different confirmation frame formats.
  • the acknowledgment frame can adopt the downlink OFDMA transmission mode, that is, the acknowledgment frame is sent to the historical inventory station on the channel including the main channel, and the acknowledgment frame is sent to the new station on the secondary channel not occupied by the historical inventory station.
  • Other multi-site confirmation methods other than this can also be applied to this embodiment. For example, an acknowledgment frame is sent to the historical inventory site and the newly added site by means of time division; when the acknowledgment frame of the historical inventory site is replied, the reserved bits in the frame are confirmed by the historical inventory site to indicate whether the newly added site data is correctly transmitted.
  • the AP receives the transmission request RTS frame sent by the historical inventory station on the channel including the primary channel, and sends an indication frame to the historical inventory station and the newly added station, and the historical inventory site is according to the indication frame.
  • Data is transmitted on the channel including the primary channel and the new station transmits data on the secondary channel that is not occupied by the historical inventory site according to the indication frame.
  • FIG. 8 is a schematic structural diagram of Embodiment 1 of a data transmission apparatus according to the present invention. As shown in FIG. 8, the apparatus of this embodiment may include: a receiving module 11 and a sending module 12, where
  • the receiving module 11 is configured to receive a transmission request RTS frame sent by the historical inventory station on a channel including the primary channel.
  • the sending module 12 is configured to send an indication frame to the historical inventory station and the newly added station, so that the historical inventory station sends data according to the indication frame on the channel including the primary channel, and the new station is not occupied according to the indication frame at the historical inventory site.
  • the data is transmitted on the secondary channel.
  • the receiving module receives the RTS frame sent by the historical inventory station on the channel including the primary channel, and the sending module sends the indication frame to the historical inventory station and the newly added station, so that the historical inventory station according to the indication
  • the frame transmits data on the channel including the primary channel and causes the new station to transmit data on the secondary channel that is not occupied by the historical inventory site according to the indication frame.
  • the device in this embodiment can be used to implement the technical solution of the method embodiment shown in FIG. 1.
  • the principle is similar, and details are not described herein again.
  • FIG. 9 is a schematic structural diagram of Embodiment 2 of the data transmission apparatus of the present invention.
  • the apparatus of this embodiment is on the basis of the apparatus structure shown in FIG. 8.
  • the sending module 12 includes: a first sending unit 121. And a second transmitting unit 122, wherein
  • the first transmitting unit 121 is configured to send a CTS frame to the historical inventory station on the channel including the primary channel, so that the historical inventory station transmits data on the channel including the primary channel according to the CTS frame.
  • the second sending unit 122 is configured to send a scheduling frame to the newly added station on the secondary channel that is not occupied by the historical inventory station, so that the newly added station sends data according to the scheduling frame on the secondary channel that is not occupied by the historical inventory station.
  • the second sending unit 122 is specifically configured to send, to the newly added station, a scheduling frame that includes the identifier of the newly added station on the secondary channel that is not occupied by the historical inventory station, so that the newly added station is determined according to the identifier. Sending data on the secondary channel that is not occupied by the historical inventory site; or sending a scheduling frame containing the identifiable set of newly added site identifiers to the newly added site, so that a new set of sites is based on the data transmission demand at the historical inventory site Data is sent on the unoccupied secondary channel.
  • the sending module 12 is specifically configured to send a CTS frame including the newly added station scheduling indication information to the historical inventory station and the newly added station on the channel including the primary channel, so that the historical inventory station is in accordance with the CTS frame.
  • the data is transmitted on the channel including the primary channel and the new station transmits data on the secondary channel that is not occupied by the historical inventory site according to the CTS frame.
  • the new site scheduling indication information includes the identifier of the newly added site to be scheduled; or the identifier of a group of newly added stations that can be scheduled; or the indication status information indicating the identifier bit.
  • the sending module 12 is further configured to: after the historical inventory site and the newly added site complete data transmission, send a first acknowledgement frame to the historical inventory station on the channel including the primary channel, where the first acknowledgement frame is included for Information indicating whether the data of the historical inventory site is correctly transmitted; sending a second confirmation frame to the newly added station on the secondary channel not occupied by the historical inventory site, where the second confirmation frame includes indicating whether the data of the newly added site is correctly transmitted information.
  • the indication frame and/or the acknowledgement frame are transmitted in the OFDMA mode.
  • the indication frame further includes the bandwidth occupied by the historical inventory site and the reserved time length, and/or the bandwidth and transmission duration that the new site can use.
  • the device in this embodiment can be used to implement the technical solution of the method embodiment shown in FIG. 1.
  • the principle is similar, and details are not described herein again.
  • FIG. 10 is a schematic structural diagram of a third embodiment of a data transmission apparatus according to the present invention.
  • the apparatus of this embodiment may include: a receiving module 21 and a sending module 22, where
  • the receiving module 21 is configured to receive an indication frame sent by the access point.
  • the sending module 22 is configured to send data on the secondary channel that is not occupied by the historical inventory site according to the indication frame.
  • the receiving module 21 is specifically configured to receive a scheduling frame that is sent by the access point on a secondary channel that is not occupied by the historical inventory station, where the sending module 22 is specifically configured to send data according to the scheduling frame on the secondary channel that is not occupied by the historical inventory site. .
  • the receiving module 21 is specifically configured to receive a scheduling frame that includes an identifier of the newly added station that is sent by the access point on the secondary channel that is not occupied by the historical inventory site, and the sending module 22 is specifically configured to determine, after being scheduled according to the identifier, that the historical inventory site is not occupied. Transmitting data on the secondary channel; or, receiving module 21 specifically A scheduling frame sent by the receiving access point and containing an identifier of a schedulable group of newly added stations, the sending module
  • the receiving module 21 is specifically configured to receive a CTS frame that is sent by the access point on the channel that includes the primary channel and that includes the new station scheduling indication information, where the sending module 22 is specifically configured to use the CTS frame according to the historical inventory site.
  • the data is sent on the occupied secondary channel.
  • the new station scheduling indication information includes the identifier of the newly added station to be scheduled; or the identifier of a group of newly added stations that can be scheduled; or the indication status information indicating the identifier bit.
  • the receiving module 21 is further configured to: after receiving the data according to the indication frame on the secondary channel that is not occupied by the historical inventory site, receive the second acknowledgement frame sent by the access point on the secondary channel that is not occupied by the historical inventory site.
  • the indication frame and/or the second acknowledgement frame are transmitted in an OFDMA manner.
  • the sending module 22 is specifically configured to use the OFDMA method to send data according to the indication frame on the secondary channel that is not occupied by the historical inventory station.
  • the device in this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 2, but the principle is similar, and details are not described herein again.
  • the receiving module receives the indication frame sent by the access point, and the sending module sends the data according to the indication frame on the secondary channel that is not occupied by the historical inventory station.
  • the uplink OFDMA data transmission in the compatibility mode is realized, and the newly added station can transmit data on the secondary channel that is not occupied by the historical inventory site, thereby solving the bandwidth waste problem caused by the historical inventory site data transmission.
  • FIG. 11 is a schematic structural diagram of Embodiment 4 of the data transmission apparatus according to the present invention.
  • the apparatus of this embodiment is on the basis of the apparatus structure shown in FIG. 10, and further, the indication frame further includes a historical inventory site.
  • the occupied bandwidth and the reserved time length, and/or the bandwidth and transmission duration that can be used by the new site further include: a parsing module 23,
  • the parsing module 23 is configured to parse the indication frame, obtain the bandwidth occupied by the historical inventory site and the reserved time length, and/or, before the sending module 22 sends the data according to the indication frame on the secondary channel that is not occupied by the historical inventory site.
  • the bandwidth and transmission duration that can be used by the new site.
  • the sending module 22 is specifically configured to send data according to the bandwidth occupied by the acquired historical inventory site and the reserved time length, and/or the bandwidth and transmission duration that the new site can use on the secondary channel that is not occupied by the historical inventory site.
  • the device of this embodiment can be used to implement the technical solution of the method embodiment shown in FIG. 2, The principle is similar, and will not be described here.
  • the apparatus of this embodiment includes: a monitoring module 24, a parsing module 25, and a sending module 26, where
  • the monitoring module 24 is configured to listen to data frames sent by the historical inventory station.
  • the parsing module 25 is configured to parse the data frame header sent by the historical inventory station to learn the transmission bandwidth and the transmission duration of the historical inventory site.
  • the sending module 26 is configured to send data according to the transmission bandwidth and the transmission duration of the learned historical inventory station on the secondary channel that is not occupied by the historical inventory station, and the end time of the sending data cannot exceed the transmission end time of the historical inventory station.
  • the device in this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 5.
  • the principle is similar, and details are not described herein again.
  • the data transmission system of the embodiment of the present invention includes the data transmission device shown in any one of the foregoing FIG. 8 to FIG. 9 and FIG. 10 to FIG. 12, which can be used to implement the technical solution of the method embodiment shown in FIG. , will not repeat them here.
  • FIG. 13 is a schematic structural diagram of Embodiment 6 of the data transmission apparatus of the present invention.
  • the apparatus of this embodiment may include: a receiver 31 and a transmitter 32, where
  • the receiver 31 is configured to receive a transmission request RTS frame transmitted by the historical inventory station on a channel including the primary channel.
  • the transmitter 32 is configured to send an indication frame to the historical inventory station and the newly added station, so that the historical inventory station transmits data according to the indication frame on the channel including the primary channel, and causes the newly added station to be occupied according to the indication frame at the historical inventory site.
  • the data is transmitted on the secondary channel.
  • the data transmission apparatus receives, by the receiver, an RTS frame sent by the historical inventory station on a channel including the primary channel, and the sender sends an indication frame to the historical inventory station and the newly added station, so that the historical inventory site according to the indication
  • the frame transmits data on the channel including the primary channel and causes the new station to transmit data on the secondary channel that is not occupied by the historical inventory site according to the indication frame.
  • the transmitter 32 is further configured to send a CTS frame to the historical inventory station on the channel including the primary channel, so that the historical inventory station includes the primary channel according to the CTS frame.
  • the transmitter 32 is specifically configured to send a scheduling frame to the newly added station on the secondary channel that is not occupied by the historical inventory station, so that the newly added station sends data according to the scheduling frame on the secondary channel that is not occupied by the historical inventory station.
  • the transmitter 32 is specifically configured to send, to the newly added station, a scheduling frame that includes the identifier of the newly added station on the secondary channel that is not occupied by the historical inventory site, so that the newly added station determines that the scheduled site is not occupied by the historical inventory site according to the identifier. Sending data on the channel; or sending a scheduling frame containing the identities of a set of newly added stations to the newly added station, so that a group of newly added stations send data on the secondary channel not occupied by the historical inventory station according to the data transmission requirement .
  • the transmitter 32 is specifically configured to send a CTS frame including the newly added station scheduling indication information to the historical inventory station and the newly added station on the channel including the primary channel, so that the historical inventory station is in accordance with the CTS frame.
  • the data is transmitted on the channel including the primary channel and the new station transmits data on the secondary channel that is not occupied by the historical inventory site according to the CTS frame.
  • the new site scheduling indication information includes the identifier of the newly added site to be scheduled; or the identifier of a group of newly added stations that can be scheduled; or the indication status information indicating the identifier bit.
  • the transmitter 32 is further configured to send, after the historical inventory station and the newly added station complete the data transmission, a first acknowledgement frame to the historical inventory station on the channel including the primary channel, where the first acknowledgement frame is included for Information indicating whether the data of the historical inventory site is correctly transmitted; sending a second confirmation frame to the newly added station on the secondary channel not occupied by the historical inventory site, where the second confirmation frame includes indicating whether the data of the newly added site is correctly transmitted information.
  • the indication frame and/or the acknowledgement frame are transmitted in the OFDMA mode.
  • the indication frame further includes the bandwidth occupied by the historical inventory site and the reserved time length, and/or the bandwidth and transmission duration that the new site can use.
  • the device in this embodiment can be used to implement the technical solution of the method embodiment shown in FIG. 1.
  • the principle is similar, and details are not described herein again.
  • FIG. 14 is a schematic structural diagram of Embodiment 7 of the data transmission apparatus of the present invention.
  • the apparatus of this embodiment may include: a receiver 41 and a transmitter 42, wherein
  • the receiver 41 is configured to receive an indication frame sent by the access point.
  • the transmitter 42 is configured to transmit data on the secondary channel that is not occupied by the historical inventory site according to the indication frame.
  • the receiver 41 is specifically configured to receive a scheduling frame that is sent by the access point on a secondary channel that is not occupied by the historical inventory station, and the transmitter 42 is specifically configured to use the scheduling frame in the historical inventory site. Send data on the channel.
  • the receiver 41 is specifically configured to receive a scheduling frame that includes an identifier of the newly added station that is sent by the access point on the secondary channel that is not occupied by the historical inventory station, and the transmitter 42 is specifically configured to determine, after being determined according to the identifier, that the historical inventory site is not occupied.
  • the data is sent on the secondary channel; or the receiver 41 is specifically configured to receive a scheduling frame that is sent by the access point and includes an identifier of the schedulable group of newly added stations, and the transmitter 42 is specifically configured to use the historical storage site according to the data transmission requirement. Data is sent on the unoccupied secondary channel.
  • the receiver 41 is specifically configured to receive a CTS frame that is sent by the access point on the channel that includes the primary channel and includes the new station scheduling indication information, where the transmitter 42 is specifically configured to use the CTS frame according to the historical inventory site.
  • the data is sent on the occupied secondary channel.
  • the new station scheduling indication information includes the identifier of the newly added station to be scheduled; or the identifier of a group of newly added stations that can be scheduled; or the indication status information indicating the identifier bit.
  • the receiver 41 is further configured to receive a second acknowledgement frame sent by the access point on the secondary channel that is not occupied by the historical inventory station after the data is sent on the secondary channel that is not occupied by the historical inventory site according to the indication frame.
  • the indication frame and/or the second acknowledgement frame are transmitted in an OFDMA manner.
  • the transmitter 42 is specifically configured to adopt, according to the indication frame, on a secondary channel that is not occupied by the historical inventory site.
  • the OFDMA method sends data.
  • the device in this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 2, but the principle is similar, and details are not described herein again.
  • the data transmission apparatus receives an indication frame sent by an access point through a receiver, and the transmitter transmits data according to the indication frame on a secondary channel that is not occupied by the historical inventory station. Thereby, the uplink OFDMA data transmission in the compatible mode is realized, and the newly added station can transmit data on the secondary channel that is not occupied by the historical inventory site, thereby solving the problem of bandwidth waste caused by the historical inventory site data transmission.
  • the apparatus of this embodiment is on the basis of the apparatus structure shown in FIG. 14.
  • the indication frame further includes a historical inventory site.
  • the occupied bandwidth and the reserved time length further include: a first processor 43 configured to parse before the transmitter 42 transmits data according to the indication frame on the secondary channel that is not occupied by the historical inventory site. Indicates the frame, the bandwidth occupied by the historical inventory site and the length of time reserved.
  • the transmitter 42 is specifically configured to send data on the secondary channel that is not occupied by the historical inventory site according to the bandwidth occupied by the acquired historical inventory site and the reserved time length.
  • the device in this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 2, and the implementation principle is similar, and details are not described herein again.
  • FIG. 16 is a schematic structural diagram of Embodiment 9 of the data transmission apparatus of the present invention.
  • the apparatus of this embodiment includes: a second processor 45 and a transmitter 46, where
  • the second processor 45 is configured to listen to data frames transmitted by the historical inventory station.
  • the second processor 45 is further configured to parse the data frame frame header sent by the historical inventory station to learn the transmission bandwidth and the transmission duration of the historical inventory site.
  • the transmitter 46 is configured to send data according to the transmission bandwidth and the transmission duration of the learned historical inventory station on the secondary channel that is not occupied by the historical inventory station, and the end time of the transmission data cannot exceed the transmission end time of the historical inventory station.
  • the device in this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 5.
  • the principle is similar, and details are not described herein again.
  • the data transmission system of the embodiment of the present invention includes the data transmission device shown in any of the foregoing FIG. 13 and FIG. 14 to FIG. 16 , which can be used to implement the technical solution of the method embodiment shown in FIG. 6 , and the implementation principle thereof is similar. No longer.

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Abstract

本发明实施例提供一种数据传输方法、装置和***。该方法包括：接收历史存量站点在包含主信道在内的信道上发送的RTS帧，向历史存量站点和新增站点发送指示帧，以使历史存量站点根据指示帧在包含主信道在内的信道上发送数据且使新增站点根据指示帧在历史存量站点未占用的次信道上发送数据。本发明实施例提供的数据传输方法、装置和***，实现了兼容模式下的上行OFDMA数据传输，解决了历史存量站点数据传输时引起的带宽浪费问题。

Description

数据传输方法、 装置和*** 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、 装置和系 统。 背景技术
在无线局域网 （ Wireless local access network , 简称： WLAN )标准演 进的过程中， 一个重要的特性是后向兼容， 即新的接入点 （Access Point , 以下简称： AP )和站点 （STA )可以用老的格式进行传输， 老的 STA可以 在新的 AP下正常通信。 在正交频分多址 ( orthogonal frequency division multiplexing , 以下简称： OFDM )制式的 WLAN标准演进的过程中， 带宽 逐渐变大。 最初的 IEEE 802.1 la中采用 20MHz的带宽， IEEE 802.1 In中带宽 扩展到了 40MHz , IEEE 802.1 lac中又将带宽进一步扩展到了 80MHz和 160MHz ( 80+80ΜΗζ ) , 在未来的 WLAN标准中也可能采用更大的通信带 宽。 网络进行升级应用新的标准， 在升级的过程中一般是做到对原有设备 的兼容。 在对网络升级时， 例如从 IEEE 802.1 In网络升级到 IEEE 802.1 lac 网络， 会存在新老两种站点， 老站点是历史存量站点， 是网络升级前的站 点， 支持升级前的标准例如 IEEE 802.11η, 新站点是新增站点， 是网络升 级后部署的站点， 支持升级前后的两种标准， 例如既支持 IEEE 802.11η又 支持 IEEE 802.1 lac。
但是无论总的通信带宽扩展到多大， 都存在主信道和除主信道之外的次 信道。 在通信的过程中， 不论是新站点还是老站点都必须选用包括主信道在 内的信道进行数据传输。 由于历史存量站点可以支持的带宽比较小， 而新增 站点可以支持的带宽比较大， 因此， 当老站点向 AP发送数据时， 会造成带宽 资源的严重浪费。 发明内容 本发明实施例提供一种数据传输方法、 装置和***， 实现了兼容模式下 的上行 OFDMA数据传输，解决了历史存量站点数据传输时引起的带宽浪费 问题。
第一方面， 本发明实施例提供一种数据传输方法， 包括：
接收历史存量站点在包含主信道在内的信道上发送的发送请求 RTS帧； 向所述历史存量站点和新增站点发送指示帧， 以使所述历史存量站点根 据所述指示帧在包含所述主信道在内的信道上发送数据且使所述新增站点根 据所述指示帧在所述历史存量站点未占用的次信道上发送数据。
在第一方面的第一种可能的实施方式中， 所述向所述历史存量站点和新 增站点发送指示帧， 以使所述历史存量站点根据所述指示帧在包含所述主信 道在内的信道上发送数据且使所述新增站点根据所述指示帧在所述历史存量 站点未占用的次信道上发送数据， 包括：
在包含所述主信道在内的信道上向所述历史存量站点发送发送无阻 CTS 帧， 以使所述历史存量站点根据所述 CTS帧在包含所述主信道在内的信道上 发送数据；
在所述历史存量站点未占用的次信道上向所述新增站点发送调度帧， 以 使所述新增站点根据所述调度帧在所述历史存量站点未占用的次信道上发送 数据。
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， 所述在所述历史存量站点未占用的次信道上向所述新增站点发送 调度帧， 以使所述新增站点根据所述调度帧在所述历史存量站点未占用的次 信道上发送数据， 包括：
在所述历史存量站点未占用的次信道上向所述新增站点发送包含所述新 增站点的标识的调度帧， 以使所述新增站点根据所述标识确定被调度后在所 述历史存量站点未占用的次信道上发送数据； 或者，
向所述新增站点发送包含可调度的一组新增站点的标识的调度帧， 以使 所述一组新增站点根据数据发送需求在所述历史存量站点未占用的次信道上 发送数据。
结合第一方面， 在第一方面的第三种可能的实施方式中， 所述向所述历 史存量站点和新增站点发送指示帧， 以使所述历史存量站点根据所述指示帧 在包含所述主信道在内的信道上发送数据且使所述新增站点根据所述指示帧 在所述历史存量站点未占用的次信道上发送数据， 包括：
在包含所述主信道在内的信道上向所述历史存量站点和所述新增站点发 送包含新增站点调度指示信息的 CTS 帧， 以使所述历史存量站点根据所述 CTS帧在包含所述主信道在内的信道上发送数据且使所述新增站点根据所述 CTS帧在所述历史存量站点未占用的次信道上发送数据。
结合第一方面的第三种可能的实施方式， 在第一方面的第四种可能的实 施方式中， 所述新增站点调度指示信息， 包括：
待调度的新增站点的标识； 或者，
可调度的一组新增站点的标识； 或者，
指示标识位的指示状态信息。
结合第一方面至第一方面的第四种可能的实施方式中任一项所述的方 法， 在第一方面的第五种可能的实施方式中， 在所述历史存量站点和新增站 点完成数据发送之后， 还包括：
在包含所述主信道在内的信道上向所述历史存量站点发送第一确认帧， 所述第一确认帧中包含用于指示所述历史存量站点的数据是否正确传输的信 息；
在所述历史存量站点未占用的次信道上向所述新增站点发送第二确认 帧， 所述第二确认帧中包含用于指示所述新增站点的数据是否正确传输的信 息。
结合第一方面的第五种可能的实施方式， 在第一方面的第六种可能的实 施方式中， 所述指示帧和 /或所述确认帧采用 OFDMA方式传输。
结合第一方面至第一方面的第四种可能的实施方式中任一项所述的方 法， 在第一方面的第七种可能的实施方式中， 所述指示帧中还包含所述历史 存量站点所占用的带宽和预留的时间长度， 和 /或， 所述新增站点能使用的带 宽和传输时长。
第二方面， 本发明实施例提供一种数据传输方法， 包括：
接收接入点发送的指示帧；
根据所述指示帧在历史存量站点未占用的次信道上发送数据。
在第二方面的第一种可能的实施方式中，所述接收接入点发送的指示帧， 根据所述指示帧在历史存量站点未占用的次信道上发送数据， 包括： 接收所述接入点在所述历史存量站点未占用的次信道上发送的调度帧； 根据所述调度帧在所述历史存量站点未占用的次信道上发送数据。
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， 所述接收接入点在所述历史存量站点未占用的次信道上发送的调 度帧， 根据所述调度帧在所述历史存量站点未占用的次信道上发送数据， 包 括：
接收所述接入点在所述历史存量站点未占用的次信道上发送的包含新增 站点的标识的调度帧， 根据所述标识确定被调度后在所述历史存量站点未占 用的次信道上发送数据； 或者，
接收所述接入点发送的包含可调度的一组新增站点的标识的调度帧， 根 据数据发送需求在所述历史存量站点未占用的次信道上发送数据。
结合第二方面， 在第二方面的第三种可能的实施方式中， 所述接收接入 点发送的指示帧， 根据所述指示帧在历史存量站点未占用的次信道上发送数 据， 包括：
接收所述接入点在包含所述主信道在内的信道上发送的包含新增站点调 度指示信息的 CTS帧；
根据所述 CTS帧在所述历史存量站点未占用的次信道上发送数据。 结合第二方面的第三种可能的实施方式， 在第二方面的第四种可能的实 施方式中， 所述新增站点调度指示信息， 包括：
待调度的新增站点的标识； 或者，
可调度的一组新增站点的标识； 或者，
指示标识位的指示状态信息。
结合第二方面至第二方面的第四种可能的实施方式中任一项所述的方 法， 在第二方面的第五种可能的实施方式中， 在根据所述指示帧在历史存量 站点未占用的次信道上发送完数据之后， 还包括：
接收所述接入点在历史存量站点未占用的次信道上发送的第二确认帧， 所述指示帧和 /或所述第二确认帧采用 OFDMA方式传输；
所述根据所述指示帧在历史存量站点未占用的次信道上发送数据包括： 根据所述指示帧在历史存量站点未占用的次信道上采用 OFDMA方式发 送数据。
结合第二方面至第二方面的第四种可能的实施方式中任一项所述的方 法， 在第二方面的第六种可能的实施方式中， 所述指示帧中还包含所述历史 存量站点所占用的带宽和预留的时间长度， 和 /或， 所述新增站点能使用的带 宽和传输时长；
所述根据所述指示帧在所述历史存量站点未占用的次信道上发送数据之 前， 包括：
解析所述指示帧， 获取所述历史存量站点所占用的带宽和预留的时间长 度， 和 /或， 所述新增站点能使用的带宽和传输时长；
所述根据所述指示帧在所述历史存量站点未占用的次信道上发送数据， 包括：
根据获取的所述历史存量站点所占用的带宽和预留的时间长度， 和 /或， 所述新增站点能使用的带宽和传输时长在所述历史存量站点未占用的次信道 上发送数据。
第三方面， 本发明提供一种数据传输方法， 包括：
监听所述历史存量站点发送的数据帧；
解析所述历史存量站点发送的数据帧帧头获知所述历史存量站点的传输 带宽和传输时长；
根据获知的所述历史存量站点的传输带宽和传输时长在所述历史存量站 点未占用的次信道上发送数据， 发送数据的结束时刻不能超过所述历史存量 站点的传输结束时刻。
第四方面， 本发明提供一种数据传输装置， 包括：
接收模块， 用于接收历史存量站点在包含主信道在内的信道上发送的发 送请求 RTS帧；
发送模块， 用于向所述历史存量站点和新增站点发送指示帧， 以使所述 历史存量站点根据所述指示帧在包含所述主信道在内的信道上发送数据且使 所述新增站点根据所述指示帧在所述历史存量站点未占用的次信道上发送数 据。
在第四方面的第一种可能的实施方式中， 所述发送模块包括：
第一发送单元， 用于在包含所述主信道在内的信道上向所述历史存量站 点发送发送无阻 CTS帧，以使所述历史存量站点根据所述 CTS帧在包含所述 主信道在内的信道上发送数据；
第二发送单元， 用于在所述历史存量站点未占用的次信道上向所述新增 站点发送调度帧， 以使所述新增站点根据所述调度帧在所述历史存量站点未 占用的次信道上发送数据。
结合第四方面的第一种可能的实施方式， 在第四方面的第二种可能的实 施方式中， 所述第二发送单元具体用于：
在所述历史存量站点未占用的次信道上向所述新增站点发送包含所述新 增站点的标识的调度帧， 以使所述新增站点根据所述标识确定被调度后在所 述历史存量站点未占用的次信道上发送数据； 或者，
向所述新增站点发送包含可调度的一组新增站点的标识的调度帧， 以使 所述一组新增站点根据数据发送需求在所述历史存量站点未占用的次信道上 发送数据。
结合第一方面， 在第四方面的第三种可能的实施方式中， 所述发送模块 具体用于：
在包含所述主信道在内的信道上向所述历史存量站点和所述新增站点发 送包含新增站点调度指示信息的 CTS 帧， 以使所述历史存量站点根据所述 CTS帧在包含所述主信道在内的信道上发送数据且使所述新增站点根据所述 CTS帧在所述历史存量站点未占用的次信道上发送数据。
结合第四方面的第四种可能的实施方式， 在第四方面的第四种可能的实 施方式中， 所述新增站点调度指示信息， 包括：
待调度的新增站点的标识； 或者，
可调度的一组新增站点的标识； 或者，
指示标识位的指示状态信息。
结合第四方面至第四方面的第四种可能的实施方式中任一项所述的装 置， 在第四方面的第五种可能的实施方式中， 所述发送模块还用于：
在包含所述主信道在内的信道上向所述历史存量站点发送第一确认帧， 所述第一确认帧中包含用于指示所述历史存量站点的数据是否正确传输的信 息；
在所述历史存量站点未占用的次信道上向所述新增站点发送第二确认 帧， 所述第二确认帧中包含用于指示所述新增站点的数据是否正确传输的信 息。
结合第四方面的第五种可能的实施方式， 在第四方面的第六种可能的实 施方式中， 所述指示帧和 /或所述确认帧采用 OFDMA方式传输。
结合第四方面至第四方面的第四种可能的实施方式中任一项所述的装 置， 在第四方面的第七种可能的实施方式中， 所述指示帧中还包含所述历史 存量站点所占用的带宽和预留的时间长度， 和 /或， 所述新增站点能使用的带 宽和传输时长。
第五方面， 本发明实施例提供一种数据传输装置， 包括：
接收模块， 用于接收接入点发送的指示帧；
发送模块， 用于根据所述指示帧在历史存量站点未占用的次信道上发送 数据。
在第五方面的第一种可能的实施方式中， 所述接收模块具体用于接收所 述接入点在所述历史存量站点未占用的次信道上发送的调度帧；
所述发送模块具体用于根据所述调度帧在所述历史存量站点未占用的次 信道上发送数据。
结合第五方面的第一种可能的实施方式， 在第五方面的第二种可能的实 施方式中， 所述接收模块具体用于接收所述接入点在所述历史存量站点未占 用的次信道上发送的包含新增站点的标识的调度帧；
所述发送模块具体用于根据所述标识确定被调度后在所述历史存量站点 未占用的次信道上发送数据； 或者，
所述接收模块具体用于接收所述接入点发送的包含可调度的一组新增站 点的标识的调度帧；
所述发送模块具体用于根据数据发送需求在所述历史存量站点未占用的 次信道上发送数据。
结合第五方面， 在第五方面的第三种可能的实施方式中， 所述接收模块 具体用于接收所述接入点在包含所述主信道在内的信道上发送的包含新增站 点调度指示信息的 CTS帧；
所述发送模块具体用于根据所述 CTS帧在所述历史存量站点未占用的次 信道上发送数据。 结合第五方面的第三种可能的实施方式， 在第五方面的第四种可能的实 施方式中， 所述新增站点调度指示信息， 包括：
待调度的新增站点的标识； 或者，
可调度的一组新增站点的标识； 或者，
指示标识位的指示状态信息。
结合第五方面至第五方面的第四种可能的实施方式中任一项所述的装 置， 在第五方面的第五种可能的实施方式中， 所述接收模块还用于在根据所 述指示帧在所述历史存量站点未占用的次信道上发送完数据之后接收所述接 入点在所述历史存量站点未占用的次信道上发送的第二确认帧， 所述指示帧 和 /或所述第二确认帧采用 OFDMA方式传输；
所述发送模块具体用于根据所述指示帧在所述历史存量站点未占用的次 信道上采用 OFDMA方式发送数据。
结合第五方面至第五方面的第四种可能的实施方式中任一项所述的装 置， 在第五方面的第六种可能的实施方式中， 所述指示帧中还包含所述历史 存量站点所占用的带宽和预留的时间长度， 和 /或， 所述新增站点能使用的带 宽和传输时长；
所述装置还包括：
解析模块， 用于在所述根据所述指示帧在所述历史存量站点未占用的次 信道上发送数据之前， 解析所述指示帧， 获取所述历史存量站点所占用的带 宽和预留的时间长度， 和 /或， 所述新增站点能使用的带宽和传输时长； 所述发送模块具体用于根据获取的所述历史存量站点所占用的带宽和预 留的时间长度， 和 /或， 所述新增站点能使用的带宽和传输时长在所述历史存 量站点未占用的次信道上发送数据。
第六方面， 本发明实施例提供一种数据传输装置， 包括：
监听模块， 用于监听历史存量站点发送的数据帧；
解析模块， 用于解析所述历史存量站点发送的数据帧帧头获知所述历史 存量站点的传输带宽和传输时长；
发送模块， 用于根据获知的所述历史存量站点的传输带宽和传输时长在 所述历史存量站点未占用的次信道上发送数据， 发送数据的结束时刻不能超 过所述历史存量站点的传输结束时刻。 第七方面， 本发明实施例提供一种数据传输***， 包括第四方面至第四 方面的第七种可能的实施方式中任一项所述的数据传输装置和第五方面至第 六方面中任一项所述的数据传输装置。
本发明实施例提供的数据传输方法、 装置和***， 通过 AP接收历史存 量站点在包含主信道在内的信道上发送的 RTS帧， 向历史存量站点和新增站 点发送指示帧， 从而使历史存量站点根据指示帧在包含主信道在内的信道上 发送数据且使新增站点根据指示帧在历史存量站点未占用的次信道上发送数 据。 从而实现了兼容模式下的上行 OFDMA数据传输， 解决了历史存量站点 数据传输时引起的带宽浪费问题。 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 不付出创造性劳动性的前提下， 还可以根据这些附图获得其他的附图。
图 1为本发明数据传输方法实施例一的流程图；
图 2为本发明数据传输方法实施例一中的 CTS帧的 MAC结构示意图； 图 3为本发明数据传输方法实施例一中的 CTS帧的 MAC结构中帧控制 字段的结构示意图；
图 4为本发明数据传输方法实施例一中的 CTS帧的 MAC结构中服务字 段的结构示意图；
图 5为本发明数据传输方法实施例二的流程图；
图 6为本发明数据传输方法实施例三的流程图；
图 7为本发明数据传输方法实施例四的流程图；
图 8为本发明数据传输装置实施例一的结构示意图；
图 9为本发明数据传输装置实施例二的结构示意图；
图 10为本发明数据传输装置实施例三的结构示意图；
图 11为本发明数据传输装置实施例四的结构示意图；
图 12为本发明数据传输装置实施例五的结构示意图；
图 13为本发明数据传输装置实施例六的结构示意图； 图 14为本发明数据传输装置实施例七的结构示意图;
图 15为本发明数据传输装置实施例八的结构示意图;
图 16为本发明数据传输装置实施例九的结构示意图。 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。
图 1为本发明数据传输方法实施例一的流程图， 本实施例的方法适用于 兼容模式下的上行多站点 OFDMA数据传输， 本实施例以接入点作为执行主 体为例进行说明， 如图 1所示， 本实施例的方法可以包括：
5101、 接收历史存量站点在包含主信道在内的信道上发送的 RTS帧。 其中， 接入点接收历史存量站点在包含主信道在内的信道上发送的发送 请求（ Request To Send, 以下简称： RTS )帧， 一般是历史存量站点通过竟争 的方式在包含主信道在内的信道上发送 RTS帧，此处需说明的是， RTS帧以及 下面要说到的发送无阻（Clear to send, 以下简称： CTS ) 帧涉及无线局域网 ( WLAN ) 中的一个信道预留机制， 该机制可以由 AP也可以由站点发起。 预 留的时候首先发送一个 RTS帧， 通过在 RTS帧的持续 （Duration ) 字段中设置 网络分配矢量（ Network allocation vector, 以下简称： NAV )来预留信道， 非 目标用户接收到 RTS帧以后在 NAV时间内即使信道空闲也不允许发送任何数 据。 从 RTS帧发送开始， 到 NAV设置结束的这段时间称作一个传输机会 ( Transmission opportunity , 简称： ΤΧΟΡ ) , 接入目标用户收到 RTS帧之后 将回应 CTS帧，在 CTS帧的 Duration字段中的 NAV将根据 RTS帧中的 NAV来设 置， CTS的 NAV将设置到 TXOP的结束时刻。接收到 CTS的非目标用户在 TXOP 时间内即使信道空闲也不允许发送任何数据。
5102、 向历史存量站点和新增站点发送指示帧， 以使历史存量站点根据 指示帧在包含主信道在内的信道上发送数据且使新增站点根据指示帧在历史 存量站点未占用的次信道上发送数据。 其中， 接入点向历史存量站点和新增站点发送指示帧， 以使历史存量站 点根据指示帧在包含主信道在内的信道上发送数据且使新增站点根据指示帧 在历史存量站点未占用的次信道上发送数据， 有两种可实施的方式：
作为一种可实施的方式， 接入点在包含主信道在内的信道上向历史存量 站点发送 CTS帧，以使历史存量站点根据 CTS帧在包含主信道在内的信道上 发送数据；
接入点在历史存量站点未占用的次信道上向新增站点发送调度帧， 以使 新增站点根据调度帧在历史存量站点未占用的次信道上发送数据。
其中， 接入点在历史存量站点未占用的次信道上向新增站点发送调度帧 有两种可能的实施方式， 一种是接入点在历史存量站点未占用的次信道上向 新增站点发送包含新增站点的标识的调度帧， 以使新增站点根据标识确定被 调度后在历史存量站点未占用的次信道上发送数据， 此种情况可用于例如在
AP根据站点的反馈信息或者业务规律确知某些站点有数据要发送时的情况； 另一种是接入点向新增站点发送包含可调度的一组新增站点的标识的调度 帧， 以使一组新增站点根据数据发送需求在历史存量站点未占用的次信道上 发送数据， 此种情况可用于例如在 AP 没有站点的确切发送信息的时候采用 分组或者对所有站点广播的情况。
作为另一种可实施的方式， 接入点在包含主信道在内的信道上向历史存 量站点和新增站点发送包含新增站点调度指示信息的 CTS帧， 以使历史存量 站点根据 CTS帧在包含主信道在内的信道上发送数据且使新增站点根据 CTS 帧在历史存量站点未占用的次信道上发送数据。 在该种实施方式下， 相比较 前一种实施方式， 新增站点只需听主信道发送的数据， 更有利于节省功率， 实现较简单。
在该实施方式下， 当历史存量站点通过竟争在包括主信道在内的信道上 成功发送出 RTS帧之后，ΑΡ在向历史存量站点回复 CTS帧的时候，采用 CTS 帧中的保留比特或可复用比特对新增站点进行调度， 图 2为本发明数据传输 方法实施例一中的 CTS帧的 MAC结构示意图， 如图 2所示： 帧控制（ Frame Control )字段， 持续时间 （Duration )字段， 接收地址（ Receiver Address , 简 称： RA )字段， 帧校验序列 ( Frame Check Sequence, 简称： FCS )字段。 图 3为本发明数据传输方法实施例一中的 CTS帧的 MAC结构中帧控制字段的 结构示意图， 如图 3所示： 协议版本（ Protocol Version )字段， 类型 （Type ) 字段， 子类型 ( Subtype )字段， 到达分布式*** ( To Distribution System, , 简称： To DS )字段，来自分布式***（ From Distribution System , 简称： From DS )字段， 更多分段 ( More Fragments )字段， 重传 （Retry )字段， 功率管 理（ Power Management )字段，更多数据 ( More Data )字段，保护帧（ Protected Frame )字段和顺序 （Order ) 字段。 如图 2和图 3所示， CTS帧中的帧控制 字段中的 B8 ~ B15中的全部或者部分比特是可以复用的， 可以用来指示对新 增站点的调度。
另外在所有帧的 MAC帧之前还有一个服务字段 ( Service field )， 图 4为 本发明数据传输方法实施例一中的 CTS帧的 MAC结构中服务字段的结构示 意图， 如图 4所示， 服务字段总共包括 16个比特， 其中前 7个比特为扰码初 始化 ( Scrambler Initialization ) 比特， 后 9个比特为保留 ( Reserved ) 比特。 在服务字段中 B7 B15属于保留比特， 可以使用全部或者部分保留比特用来 指示对新增站点的调度。 此外在物理层的前导 （Preamble ) 中的保留比特或 者可以复用比特也可以用来指示对新增站点的调度， 对现有 CTS帧通过加扰 等方式携带的信息比特也可以用于指示对新增站点的调度。
新增站点调度指示信息包括： 待调度的新增站点的标识； 或者， 可调度 的一组新增站点的标识； 或者， 指示标识位的指示状态信息。
由于保留和可复用比特的数目有限， 可能不足以表示站点的标识以及资 源信息。 站点标识方式常见的有 MAC地址（ 48个比特 )或关联标识（ 16个 比特）。 当可用比特不够的时候通过重新定义与站点相关联的调度标识或者分 组来解决。例如当只有 6个比特可用的情况下可以给最多 64个站点分配调度 标识， 只有被分配了调度标识的站点可以参与 OFDMA调度。 也可以用部分 站点标识进行调度， 例如使用 MAC地址或者关联标识的后 6位进行调度。 这种方式中当有多个站点的站点标识的尾号相同并且都有数据需要发送的时 候有产生碰撞的可能。 在实施的过程中如果碰撞的概率很高的情况下可以进 一步引入退避机制以减少碰撞的概率。 在历史存量站点未占用的次信道上执 行退避机制的时候， 如果老信道上的射频滤波器不够陡峭导致邻带能量泄漏 较大的话需要在次信道上采用频域检测， 以确定次信道是否空闲。 即先把接 收信道转换到频域， 然后检测次信道上各载波所对应的频点上的信号强度。 当信号强度超过一定阈值的话表明次信道繁忙， 否则次信道空闲。
当新增站点调度指示信息包括指示标识位的指示状态信息时， 该指示状 态信息用于指示新增站点在历史存量站点根据 CTS帧在包含主信道在内的信 道上发送数据的情况下， 是否根据 CTS帧在历史存量站点未占用的次信道上 发送数据。 例如指示标识位为 0时新增站点在历史存量站点根据 CTS帧在包 含主信道在内的信道上发送数据的情况下， 根据 CTS帧在历史存量站点未占 用的次信道上不发送数据； 指示标识位为 1时新增站点在历史存量站点根据 CTS帧在包含主信道在内的信道上发送数据的情况下，根据 CTS帧在历史存 量站点未占用的次信道上发送数据， 此时新增站点可在相同信道上竟争发送 数据。 在上述情况下， 指示帧中还包含历史存量站点所占用的带宽和预留的 时间长度， 和 /或， 新增站点能使用的带宽和传输时长。
在上述实施例中， 可选的， 在历史存量站点和新增站点完成数据发送之 后， 当 AP接收完新增站点和历史存量站点的数据之后， 需要对历史存量站 点和新增站点进行确认回复， 还包括： 在包含主信道在内的信道上向历史存 量站点发送第一确认帧， 第一确认帧中包含用于指示历史存量站点的数据是 否正确传输的信息， 在历史存量站点未占用的次信道上向新增站点发送第二 确认帧， 第二确认帧中包含用于指示新增站点的数据是否正确传输的信息。 其中， 指示帧和 /或确认帧采用 OFDMA方式传输。 这里确认帧的形式取决于 数据的发送方式， 可以包括应答消息 （Acknowledgement, 简称： ACK )、 块 应答（Block Acknowledgement, 简称： BA )等不同的确认帧格式。 确认帧可 以采用下行 OFDMA传输方式， 即在包含主信道在内的信道上给历史存量站 点发送确认帧， 在历史存量站点未占用的次信道上给新增站点发送确认帧。 除此之外其它的多站点确认方式也可以适用于本实施例。 例如通过时分的方 式分别给历史存量站点和新增站点发送确认帧； 在回复历史存量站点的确认 帧的时候通过历史存量站点确认帧中的保留比特对新增站点数据是否正确传 输进行指示。
本实施例提供的数据传输方法， 通过 AP接收历史存量站点在包含主信 道在内的信道上发送的发送请求 RTS帧， 向历史存量站点和新增站点发送指 示帧， 使历史存量站点根据指示帧在包含主信道在内的信道上发送数据且使 新增站点根据指示帧在历史存量站点未占用的次信道上发送数据。 从而实现 了兼容模式下的上行 OFDMA数据传输，解决了历史存量站点数据传输时引 起的带宽浪费问题。
图 5为本发明数据传输方法实施例二的流程图， 本实施例的方法适用于 兼容模式下的上行多站点 OFDMA数据传输， 本实施例以新增站点作为执行 主体为例进行说明， 如图 5所示， 本实施例的方法可以包括：
5201、 接收接入点发送的指示帧。
5202、 根据指示帧在历史存量站点未占用的次信道上发送数据。
其中， 新增站点接收接入点发送的指示帧后， 根据指示帧在历史存量站 点未占用的次信道上发送数据， 有两种可实施的方式：
作为一种可实施的方式， 新增站点接收接入点在历史存量站点未占用的 次信道上发送的调度帧， 根据调度帧在历史存量站点未占用的次信道上发送 数据。
其中， 新增站点接收接入点在历史存量站点未占用的次信道上发送的调 度帧， 根据调度帧在历史存量站点未占用的次信道上发送数据有两种可能的 实施方式， 一种是新增站点接收接入点在历史存量站点未占用的次信道上发 送的包含新增站点的标识的调度帧， 根据标识确定被调度后在历史存量站点 未占用的次信道上发送数据， 此种情况可用于例如在 AP根据站点的反馈信 息或者业务规律确知某些站点有数据要发送时的情况； 另一种是新增站点接 收接入点发送的包含可调度的一组新增站点的标识的调度帧， 根据数据发送 需求在历史存量站点未占用的次信道上发送数据，此种情况可用于例如在 AP 没有站点的确切发送信息的时候采用分组或者对所有站点广播的情况。
作为另一种可实施的方式， 新增站点接收接入点在包含主信道在内的信 道上发送的包含新增站点调度指示信息的 CTS帧，根据 CTS帧在历史存量站 点未占用的次信道上发送数据。 在该种实施方式下， 相比较前一种实施方式， 新增站点只需听主信道发送的数据， 更有利于节省功率， 实现较简单。
在该实施方式下， 新增站点调度指示信息包括： 待调度的新增站点的标 识； 或者， 可调度的一组新增站点的标识； 或者， 指示标识位的指示状态信 息。 当新增站点调度指示信息包括指示标识位的指示状态信息时， 该指示状 态信息用于指示新增站点在历史存量站点根据 CTS帧在包含主信道在内的信 道上发送数据的情况下， 是否根据 CTS帧在历史存量站点未占用的次信道上 发送数据。 例如指示标识位为 0时新增站点在历史存量站点根据 CTS帧在包 含主信道在内的信道上发送数据的情况下， 根据 CTS帧在历史存量站点未占 用的次信道上不发送数据； 指示标识位为 1时新增站点在历史存量站点根据 CTS帧在包含主信道在内的信道上发送数据的情况下，根据 CTS帧在历史存 量站点未占用的次信道上发送数据， 此时新增站点可在相同信道上竟争发送 数据。
在上述实施例中， 当指示标识位为 1 时， 可选的， 指示帧中还包含历史 存量站点所占用的带宽和预留的时间长度， 和 /或， 新增站点能使用的带宽和 传输时长。 此时新增站点根据指示帧在历史存量站点未占用的次信道上发送 数据之前， 还要解析指示帧， 获取历史存量站点所占用的带宽和预留的时间 长度， 和 /或， 新增站点能使用的带宽和传输时长， 然后根据获取的历史存量 站点所占用的带宽和预留的时间长度， 和 /或， 新增站点能使用的带宽和传输 时长在历史存量站点未占用的次信道上发送数据。 具体地， 新增站点接收到 接入点回复的 CTS帧后，通过解析 CTS帧可以得到历史存量站点所占用的带 宽和预留的时间长度， 和 /或， 新增站点能使用的带宽和传输时长。 此时新增 站点可以在历史存量站点没有占用的次信道上发起数据传输。
在上述实施例中， 在新增站点根据指示帧在历史存量站点未占用的次信 道上发送完数据之后， 还包括：
接收接入点在历史存量站点未占用的次信道上发送的第二确认帧， 指示 帧和 /或第二确认帧采用 OFDMA方式传输；
在上述实施例中， 新增站点根据指示帧在历史存量站点未占用的次信道 上采用 OFDMA方式发送数据， 采用 OFDMA方式发送数据可降低数据传输 对历史存量站点的干扰。
在上述实施例中， 由于多个新增站点都可能在同样的信道上发起竟争， 因此会出现碰撞， 可采用一些机制来减小碰撞的概率。 例如， 新增站点在次 信道上发送数据之前也需要进行回退，在回退到 0之前如果已经有其它站点在 次信道上发送数据则该站点不能在该次信道上发送数据， 当新增站点发送之 前需要退避的时候， 需要在发送数据帧的时候与历史存量站点的数据保持 OFDM符号对齐， 两者误差不超过循环前缀的长度。 又例如， 将次信道分成 多个子信道， 每个新增站点随机选择其中的一个或者多个进行数据发送。 再 例如将站点进行分组， 只有与历史存量站点不是同一个组的新增站点可以送 数据。 上述减小碰撞的机制还可以结合起来使用， 本发明实施例不限于此。
在上述实施例中，新增站点发送数据的时候需要采用 OFDMA的方式进行 发送， 以避免新增站点的数据传输对历史存量站点的数据造成干扰。 由于历 史存量站点不支持 OFDMA传输方式， 因此对新增站点的干扰会较大， 这时新 增站点的数据传输可以采用较鲁棒的传输方式， 例如低阶的调制编码方式 ( Modulation and coding scheme, MCS ) , 以降氐误包率。
本实施例提供的数据传输方法，通过新增站点接收接入点发送的指示帧， 可根据指示帧在历史存量站点未占用的次信道上发送数据， 实现了兼容模式 下的上行 OFDMA数据传输，解决了历史存量站点数据传输时引起的带宽浪 费问题。
图 6为本发明数据传输方法实施例三的流程图， 本实施例以新增站点监 听历史存量站点发送的数据， 根据获知的历史存量站点的传输带宽和传输时 长发送数据为例进行说明， 如图 6所示， 本实施例的方法可以包括：
S301、 监听历史存量站点发送的数据帧。
S302、 解析历史存量站点发送的数据帧帧头获知历史存量站点的传输带 宽和传输时长。
其中， 具体的传输带宽和传输时长通常分别在物理层帧头的带宽 ( Bandwidth, 简称： BW )字段和长度（ Length )字段中指示。
S303、 根据获知的历史存量站点的传输带宽和传输时长在历史存量站点 未占用的次信道上发送数据， 发送数据的结束时刻不能超过历史存量站点的 传输结束时刻。
本实施例提供的数据传输方法， 通过新增站点监听历史存量站点发送的 数据帧， 解析历史存量站点发送的数据帧帧头获知历史存量站点的传输带宽 和传输时长， 根据获知的历史存量站点的传输带宽和传输时长在历史存量站 点未占用的次信道上发送数据，实现了兼容模式下的上行 OFDMA数据传输， 解决了历史存量站点数据传输时引起的带宽浪费问题。
下面采用一个具体的实施例， 对上述方法实施例的技术方案进行详细说 明。
图 7为本发明数据传输方法实施例四的流程图， 本实施例以接入点接收 到 RTS帧后向历史存量站点和新增站点发送指示帧， 历史存量站点和新增站 点根据指示帧进行数据发送为例进行说明， 如图 7所示， 本实施例的方法可 以包括：
5601、 接入点接收历史存量站点在包含主信道在内的信道上发送的发送 请求 RTS帧。
其中， 接入点接收的是历史存量站点通过竟争的方式在包含主信道在内 的信道上发送 RTS帧。
5602、 接入点向历史存量站点和新增站点发送指示帧。
其中，接入点接收到 RTS帧后，向历史存量站点和新增站点发送指示帧， 有两种可实施的方式：
一是接入点在历史存量站点未占用的次信道上向新增站点发送调度帧。 其中， 接入点在历史存量站点未占用的次信道上向新增站点发送调度帧有两 种可能的实施方式， 一种是接入点在历史存量站点未占用的次信道上向新增 站点发送包含新增站点的标识的调度帧， 此种情况可用于例如在 AP根据站 点的反馈信息或者业务规律确知某些站点有数据要发送时的情况； 另一种是 接入点向新增站点发送包含可调度的一组新增站点的标识的调度帧， 此种情 况可用于例如在 AP没有站点的确切发送信息的时候采用分组或者对所有站 点广播的情况。
二是接入点在包含主信道在内的信道上向历史存量站点和新增站点发送 包含新增站点调度指示信息的 CTS帧。 其中， 新增站点调度指示信息包括： 待调度的新增站点的标识； 或者， 可调度的一组新增站点的标识； 或者， 指 示标识位的指示状态信息。
当新增站点调度指示信息包括指示标识位的指示状态信息时， 该指示状 态信息用于指示新增站点在历史存量站点根据 CTS帧在包含主信道在内的信 道上发送数据的情况下， 是否根据 CTS帧在历史存量站点未占用的次信道上 发送数据。 例如指示标识位为 0时新增站点在历史存量站点根据 CTS帧在包 含主信道在内的信道上发送数据的情况下， 根据 CTS帧在历史存量站点未占 用的次信道上不发送数据； 指示标识位为 1时新增站点在历史存量站点根据 CTS帧在包含主信道在内的信道上发送数据的情况下，根据 CTS帧在历史存 量站点未占用的次信道上发送数据， 此时新增站点可在相同信道上竟争发送 数据。 在上述情况下， 指示帧中还包含历史存量站点所占用的带宽和预留的 时间长度， 和 /或， 新增站点能使用的带宽和传输时长。
5603、 历史存量站点根据指示帧在包含主信道在内的信道上发送数据。
5604、新增站点根据指示帧在历史存量站点未占用的次信道上发送数据。 其中， 对应于 S602, 新增站点根据指示帧在历史存量站点未占用的次信 道上发送数据， 有两种可实施的方式：
一是新增站点接收接入点在历史存量站点未占用的次信道上发送的调度 帧， 根据调度帧在历史存量站点未占用的次信道上发送数据。 此种情况下游 两种可能的实施方式， 一种是新增站点接收接入点在历史存量站点未占用的 次信道上发送的包含新增站点的标识的调度帧， 根据标识确定被调度后在历 史存量站点未占用的次信道上发送数据， 此种情况可用于例如在 AP根据站 点的反馈信息或者业务规律确知某些站点有数据要发送时的情况； 另一种是 新增站点接收接入点发送的包含可调度的一组新增站点的标识的调度帧， 根 据数据发送需求在历史存量站点未占用的次信道上发送数据， 此种情况可用 于例如在 AP没有站点的确切发送信息的时候采用分组或者对所有站点广播 的情况。
二是新增站点接收接入点在包含主信道在内的信道上发送的包含新增站 点调度指示信息的 CTS帧，根据 CTS帧在历史存量站点未占用的次信道上发 送数据。 在该种实施方式下， 相比较前一种实施方式， 新增站点只需听主信 道发送的数据， 更有利于节省功率， 实现较简单。
在该实施方式下， 新增站点调度指示信息包括： 待调度的新增站点的标 识； 或者， 可调度的一组新增站点的标识； 或者， 指示标识位的指示状态信 息。 当新增站点调度指示信息包括指示标识位的指示状态信息时， 该指示状 态信息用于指示新增站点在历史存量站点根据 CTS帧在包含主信道在内的信 道上发送数据的情况下， 是否根据 CTS帧在历史存量站点未占用的次信道上 发送数据。 例如指示标识位为 0时新增站点在历史存量站点根据 CTS帧在包 含主信道在内的信道上发送数据的情况下， 根据 CTS帧在历史存量站点未占 用的次信道上不发送数据； 指示标识位为 1时新增站点在历史存量站点根据 CTS帧在包含主信道在内的信道上发送数据的情况下，根据 CTS帧在历史存 量站点未占用的次信道上发送数据， 此时新增站点可在相同信道上竟争发送 数据。
当指示标识位为 1 时， 可选的， 指示帧中还包含历史存量站点所占用的 带宽和预留的时间长度， 和 /或， 新增站点能使用的带宽和传输时长。 此时新 增站点根据指示帧在历史存量站点未占用的次信道上发送数据之前， 还要解 析指示帧， 获取历史存量站点所占用的带宽和预留的时间长度， 和 /或， 新增 站点能使用的带宽和传输时长， 然后根据获取的历史存量站点所占用的带宽 和预留的时间长度， 和 /或， 新增站点能使用的带宽和传输时长在历史存量站 点未占用的次信道上发送数据。 具体地， 新增站点接收到接入点回复的 CTS 帧后， 通过解析 CTS帧可以得到历史存量站点所占用的带宽和预留的时间长 度， 和 /或， 新增站点能使用的带宽和传输时长。 此时新增站点可以在历史存 量站点没有占用的次信道上发起数据传输。
S605、 接入点在包含主信道在内的信道上向历史存量站点发送第一确认 帧， 在历史存量站点未占用的次信道上向新增站点发送第二确认帧。
其中， 第一确认帧中包含用于指示历史存量站点的数据是否正确传输的 信息， 第二确认帧中包含用于指示新增站点的数据是否正确传输的信息， 指 示帧和 /或确认帧采用 OFDMA方式传输， 确认帧中包含用于指示新增站点的 数据是否正确传输的信息， 确认帧的形式取决于数据的发送方式， 可以包括 应答消息 ( Acknowledgement,简称： ACK )、块应答 ( Block Acknowledgement, 简称： BA )等不同的确认帧格式。 确认帧可以采用下行 OFDMA传输方式， 即在包含主信道在内的信道上给历史存量站点发送确认帧， 在历史存量站点 未占用的次信道上给新增站点发送确认帧。 除此之外其它的多站点确认方式 也可以适用于本实施例。 例如通过时分的方式分别给历史存量站点和新增站 点发送确认帧； 在回复历史存量站点的确认帧的时候通过历史存量站点确认 帧中的保留比特对新增站点数据是否正确传输进行指示。
本实施例提供的数据传输方法， 通过 AP接收历史存量站点在包含主信 道在内的信道上发送的发送请求 RTS帧， 向历史存量站点和新增站点发送指 示帧， 历史存量站点根据指示帧在包含主信道在内的信道上发送数据并且新 增站点根据指示帧在历史存量站点未占用的次信道上发送数据。 从而实现了 兼容模式下的上行 OFDMA数据传输，解决了历史存量站点数据传输时引起 的带宽浪费问题。 本领域普通技术人员可以理解： 实现上述各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， 执行包括上述各方法实施例的步骤； 而 前述的存储介质包括： ROM, RAM, 磁碟或者光盘等各种可以存储程序代码 的介质。
图 8为本发明数据传输装置实施例一的结构示意图， 如图 8所示， 本实 施例的装置可以包括： 接收模块 11和发送模块 12, 其中，
接收模块 11 用于接收历史存量站点在包含主信道在内的信道上发送的 发送请求 RTS帧。
发送模块 12用于向历史存量站点和新增站点发送指示帧，以使历史存量 站点根据指示帧在包含主信道在内的信道上发送数据且使新增站点根据指示 帧在历史存量站点未占用的次信道上发送数据。
本实施提供的数据传输装置， 通过接收模块接收历史存量站点在包含主 信道在内的信道上发送的 RTS帧， 发送模块向历史存量站点和新增站点发送 指示帧， 以使历史存量站点根据指示帧在包含主信道在内的信道上发送数据 且使新增站点根据指示帧在历史存量站点未占用的次信道上发送数据。 从而 实现了兼容模式下的上行 OFDMA数据传输， 解决了历史存量站点数据传输 时引起的带宽浪费问题。
本实施例的装置， 可以用于执行图 1所示方法实施例的技术方案， 其实 现原理类似， 此处不再贅述。
图 9为本发明数据传输装置实施例二的结构示意图， 如图 9所示， 本实 施例的装置在图 8所示装置结构的基 上， 进一步地， 发送模块 12包括： 第 一发送单元 121和第二发送单元 122, 其中，
第一发送单元 121用于在包含主信道在内的信道上向历史存量站点发送 CTS帧，以使历史存量站点根据 CTS帧在包含主信道在内的信道上发送数据。
第二发送单元 122用于在历史存量站点未占用的次信道上向新增站点发 送调度帧， 以使新增站点根据调度帧在历史存量站点未占用的次信道上发送 数据。
第二发送单元 122具体用于在历史存量站点未占用的次信道上向新增站 点发送包含新增站点的标识的调度帧， 以使新增站点根据标识确定被调度后 在历史存量站点未占用的次信道上发送数据； 或者， 向新增站点发送包含可 调度的一组新增站点的标识的调度帧， 以使一组新增站点根据数据发送需求 在历史存量站点未占用的次信道上发送数据。
在上述实施例中 ,发送模块 12具体用于在包含主信道在内的信道上向历 史存量站点和新增站点发送包含新增站点调度指示信息的 CTS帧， 以使历史 存量站点根据 CTS帧在包含主信道在内的信道上发送数据且使新增站点根据 CTS帧在历史存量站点未占用的次信道上发送数据。 其中， 新增站点调度指 示信息， 包括待调度的新增站点的标识； 或者， 可调度的一组新增站点的标 识； 或者， 指示标识位的指示状态信息。
可选的 ,发送模块 12还用于在历史存量站点和新增站点完成数据发送之 后， 在包含主信道在内的信道上向历史存量站点发送第一确认帧， 第一确认 帧中包含用于指示历史存量站点的数据是否正确传输的信息； 在历史存量站 点未占用的次信道上向新增站点发送第二确认帧， 第二确认帧中包含用于指 示新增站点的数据是否正确传输的信息。 其中， 指示帧和 /或确认帧采用 OFDMA方式传输。
在上述实施例中， 指示帧中还包含历史存量站点所占用的带宽和预留的 时间长度， 和 /或， 新增站点能使用的带宽和传输时长。
本实施例的装置， 可以用于执行图 1所示方法实施例的技术方案， 其实 现原理类似， 此处不再贅述。
图 10为本发明数据传输装置实施例三的结构示意图， 如图 10所示， 本 实施例的装置可以包括： 接收模块 21和发送模块 22, 其中，
接收模块 21用于接收接入点发送的指示帧。
发送模块 22 用于根据指示帧在历史存量站点未占用的次信道上发送数 据。
可选的，接收模块 21具体用于接收接入点在历史存量站点未占用的次信 道上发送的调度帧 ,发送模块 22具体用于根据调度帧在历史存量站点未占用 的次信道上发送数据。
接收模块 21 具体用于接收接入点在历史存量站点未占用的次信道上发 送的包含新增站点的标识的调度帧，发送模块 22具体用于根据标识确定被调 度后在历史存量站点未占用的次信道上发送数据； 或者， 接收模块 21具体用 于接收接入点发送的包含可调度的一组新增站点的标识的调度帧， 发送模块
22具体用于根据数据发送需求在历史存量站点未占用的次信道上发送数据。
可选的，接收模块 21具体用于接收接入点在包含主信道在内的信道上发 送的包含新增站点调度指示信息的 CTS帧， 发送模块 22具体用于根据 CTS 帧在历史存量站点未占用的次信道上发送数据。 其中， 新增站点调度指示信 息， 包括待调度的新增站点的标识； 或者， 可调度的一组新增站点的标识； 或者， 指示标识位的指示状态信息。
在上述实施例中，接收模块 21还用于在根据指示帧在历史存量站点未占 用的次信道上发送完数据之后接收接入点在历史存量站点未占用的次信道上 发送的第二确认帧， 指示帧和 /或第二确认帧采用 OFDMA方式传输。
发送模块 22 具体用于根据指示帧在历史存量站点未占用的次信道上采 用 OFDMA方式发送数据。
本实施例的装置， 可以用于执行图 2所示方法实施例的技术方案， 其实 现原理类似， 此处不再贅述。
本实施提供的数据传输装置， 通过接收模块接收接入点发送的指示帧， 发送模块根据指示帧在历史存量站点未占用的次信道上发送数据。 从而实现 了兼容模式下的上行 OFDMA数据传输， 新增站点可以在历史存量站点未占 用的次信道上发送数据，解决了历史存量站点数据传输时引起的带宽浪费问 题。
图 11为本发明数据传输装置实施例四的结构示意图， 如图 11所示， 本 实施例的装置在图 10所示装置结构的基石出上， 进一步地， 指示帧中还包含历 史存量站点所占用的带宽和预留的时间长度， 和 /或， 新增站点能使用的带宽 和传输时长时， 还包括： 解析模块 23 ,
该解析模块 23用于在发送模块 22根据指示帧在历史存量站点未占用的 次信道上发送数据之前， 解析指示帧， 获取历史存量站点所占用的带宽和预 留的时间长度， 和 /或， 新增站点能使用的带宽和传输时长。
发送模块 22 具体用于根据获取的历史存量站点所占用的带宽和预留的 时间长度， 和 /或， 新增站点能使用的带宽和传输时长在历史存量站点未占用 的次信道上发送数据。
本实施例的装置， 可以用于执行图 2所示方法实施例的技术方案， 其实 现原理类似， 此处不再贅述。
图 12为本发明数据传输装置实施例五的结构示意图， 如图 12所示， 本 实施例的装置包括： 监听模块 24、 解析模块 25、 发送模块 26, 其中，
监听模块 24用于监听历史存量站点发送的数据帧。
解析模块 25 用于解析历史存量站点发送的数据帧帧头获知历史存量站 点的传输带宽和传输时长。
发送模块 26 用于根据获知的历史存量站点的传输带宽和传输时长在历 史存量站点未占用的次信道上发送数据， 发送数据的结束时刻不能超过历史 存量站点的传输结束时刻。
本实施例的装置， 可以用于执行图 5所示方法实施例的技术方案， 其实 现原理类似， 此处不再贅述。
本发明实施例的数据传输***， 包括上述图 8-图 9和图 10-图 12中任一 所示的数据传输装置， 可用于执行图 7所示方法实施例的技术方案， 其实现 原理类似， 此处不再贅述。
图 13为本发明数据传输装置实施例六的结构示意图， 如图 13所示， 本 实施例的装置可以包括： 接收器 31和发送器 32, 其中，
接收器 31 用于接收历史存量站点在包含主信道在内的信道上发送的发 送请求 RTS帧。
发送器 32用于向历史存量站点和新增站点发送指示帧，以使历史存量站 点根据指示帧在包含主信道在内的信道上发送数据且使新增站点根据指示帧 在历史存量站点未占用的次信道上发送数据。
本实施提供的数据传输装置， 通过接收器接收历史存量站点在包含主信 道在内的信道上发送的 RTS帧， 发送器向历史存量站点和新增站点发送指示 帧， 以使历史存量站点根据指示帧在包含主信道在内的信道上发送数据且使 新增站点根据指示帧在历史存量站点未占用的次信道上发送数据。 从而实现 了兼容模式下的上行 OFDMA数据传输，解决了历史存量站点数据传输时引 起的带宽浪费问题。
在图 13所示装置结构的基础上， 进一步地， 发送器 32还用于在包含主 信道在内的信道上向历史存量站点发送 CTS帧， 以使历史存量站点根据 CTS 帧在包含主信道在内的信道上发送数据。 发送器 32 具体用于在历史存量站点未占用的次信道上向新增站点发送 调度帧， 以使新增站点根据调度帧在历史存量站点未占用的次信道上发送数 据。
发送器 32 具体用于在历史存量站点未占用的次信道上向新增站点发送 包含新增站点的标识的调度帧， 以使新增站点根据标识确定被调度后在历史 存量站点未占用的次信道上发送数据； 或者， 向新增站点发送包含可调度的 一组新增站点的标识的调度帧， 以使一组新增站点根据数据发送需求在历史 存量站点未占用的次信道上发送数据。
在上述实施例中，发送器 32具体用于在包含主信道在内的信道上向历史 存量站点和新增站点发送包含新增站点调度指示信息的 CTS帧， 以使历史存 量站点根据 CTS 帧在包含主信道在内的信道上发送数据且使新增站点根据 CTS帧在历史存量站点未占用的次信道上发送数据。 其中， 新增站点调度指 示信息， 包括待调度的新增站点的标识； 或者， 可调度的一组新增站点的标 识； 或者， 指示标识位的指示状态信息。
可选的， 发送器 32还用于在历史存量站点和新增站点完成数据发送之 后， 在包含主信道在内的信道上向历史存量站点发送第一确认帧， 第一确认 帧中包含用于指示历史存量站点的数据是否正确传输的信息； 在历史存量站 点未占用的次信道上向新增站点发送第二确认帧， 第二确认帧中包含用于指 示新增站点的数据是否正确传输的信息。 其中， 指示帧和 /或确认帧采用 OFDMA方式传输。
在上述实施例中， 指示帧中还包含历史存量站点所占用的带宽和预留的 时间长度， 和 /或， 新增站点能使用的带宽和传输时长。
本实施例的装置， 可以用于执行图 1所示方法实施例的技术方案， 其实 现原理类似， 此处不再贅述。
图 14为本发明数据传输装置实施例七的结构示意图， 如图 14所示， 本 实施例的装置可以包括： 接收器 41和发送器 42, 其中，
接收器 41用于接收接入点发送的指示帧。
发送器 42用于根据指示帧在历史存量站点未占用的次信道上发送数据。 可选的，接收器 41具体用于接收接入点在历史存量站点未占用的次信道 上发送的调度帧，发送器 42具体用于根据调度帧在历史存量站点未占用的次 信道上发送数据。
接收器 41 具体用于接收接入点在历史存量站点未占用的次信道上发送 的包含新增站点的标识的调度帧，发送器 42具体用于根据标识确定被调度后 在历史存量站点未占用的次信道上发送数据； 或者，接收器 41具体用于接收 接入点发送的包含可调度的一组新增站点的标识的调度帧，发送器 42具体用 于根据数据发送需求在历史存量站点未占用的次信道上发送数据。
可选的，接收器 41具体用于接收接入点在包含主信道在内的信道上发送 的包含新增站点调度指示信息的 CTS帧， 发送器 42具体用于根据 CTS帧在 历史存量站点未占用的次信道上发送数据。 其中， 新增站点调度指示信息， 包括待调度的新增站点的标识； 或者， 可调度的一组新增站点的标识； 或者， 指示标识位的指示状态信息。
在上述实施例中，接收器 41还用于在根据指示帧在历史存量站点未占用 的次信道上发送完数据之后接收接入点在历史存量站点未占用的次信道上发 送的第二确认帧， 指示帧和 /或第二确认帧采用 OFDMA方式传输。
发送器 42 具体用于根据指示帧在历史存量站点未占用的次信道上采用
OFDMA方式发送数据。
本实施例的装置， 可以用于执行图 2所示方法实施例的技术方案， 其实 现原理类似， 此处不再贅述。
本实施提供的数据传输装置， 通过接收器接收接入点发送的指示帧， 发 送器根据指示帧在历史存量站点未占用的次信道上发送数据。 从而实现了兼 容模式下的上行 OFDMA数据传输， 新增站点可以在历史存量站点未占用的 次信道上发送数据， 解决了历史存量站点数据传输时引起的带宽浪费问题。
图 15为本发明数据传输装置实施例八的结构示意图， 如图 15所示， 本 实施例的装置在图 14所示装置结构的基石出上， 进一步地， 指示帧中还包含历 史存量站点所占用的带宽和预留的时间长度时， 还包括： 第一处理器 43 , 该第一处理器 43用于在发送器 42根据指示帧在历史存量站点未占用的 次信道上发送数据之前， 解析指示帧， 获取历史存量站点所占用的带宽和预 留的时间长度。
发送器 42 具体用于根据获取的历史存量站点所占用的带宽和预留的时 间长度在历史存量站点未占用的次信道上发送数据。 本实施例的装置， 可以用于执行图 2所示方法实施例的技术方案， 其实 现原理类似， 此处不再贅述。
图 16为本发明数据传输装置实施例九的结构示意图， 如图 16所示， 本 实施例的装置包括： 第二处理器 45和发送器 46 , 其中，
第二处理器 45用于监听历史存量站点发送的数据帧。
第二处理器 45 还用于解析历史存量站点发送的数据帧帧头获知历史存 量站点的传输带宽和传输时长。
发送器 46 用于根据获知的历史存量站点的传输带宽和传输时长在历史 存量站点未占用的次信道上发送数据， 发送数据的结束时刻不能超过历史存 量站点的传输结束时刻。
本实施例的装置， 可以用于执行图 5所示方法实施例的技术方案， 其实 现原理类似， 此处不再贅述。
本发明实施例的数据传输***， 包括上述图 13和图 14〜图 16中任一所 示的数据传输装置， 可用于执行图 6所示方法实施例的技术方案， 其实现原 理类似， 此处不再贅述。
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、 一种数据传输方法， 其特征在于， 包括：
接收历史存量站点在包含主信道在内的信道上发送的发送请求 RTS帧； 向所述历史存量站点和新增站点发送指示帧， 以使所述历史存量站点根 据所述指示帧在包含所述主信道在内的信道上发送数据且使所述新增站点根 据所述指示帧在所述历史存量站点未占用的次信道上发送数据。
2、 根据权利要求 1所述的方法， 其特征在于， 所述向所述历史存量站点 和新增站点发送指示帧， 以使所述历史存量站点根据所述指示帧在包含所述 主信道在内的信道上发送数据且使所述新增站点根据所述指示帧在所述历史 存量站点未占用的次信道上发送数据， 包括：
在包含所述主信道在内的信道上向所述历史存量站点发送发送无阻 CTS 帧， 以使所述历史存量站点根据所述 CTS帧在包含所述主信道在内的信道上 发送数据；
在所述历史存量站点未占用的次信道上向所述新增站点发送调度帧， 以 使所述新增站点根据所述调度帧在所述历史存量站点未占用的次信道上发送 数据。
3、 根据权利要求 2所述的方法， 其特征在于， 所述在所述历史存量站点 未占用的次信道上向所述新增站点发送调度帧， 以使所述新增站点根据所述 调度帧在所述历史存量站点未占用的次信道上发送数据， 包括：
在所述历史存量站点未占用的次信道上向所述新增站点发送包含所述新 增站点的标识的调度帧， 以使所述新增站点根据所述标识确定被调度后在所 述历史存量站点未占用的次信道上发送数据； 或者，
向所述新增站点发送包含可调度的一组新增站点的标识的调度帧， 以使 所述一组新增站点根据数据发送需求在所述历史存量站点未占用的次信道上 发送数据。
4、 根据权利要求 1所述的方法， 其特征在于， 所述向所述历史存量站点 和新增站点发送指示帧， 以使所述历史存量站点根据所述指示帧在包含所述 主信道在内的信道上发送数据且使所述新增站点根据所述指示帧在所述历史 存量站点未占用的次信道上发送数据， 包括：
在包含所述主信道在内的信道上向所述历史存量站点和所述新增站点发 送包含新增站点调度指示信息的 CTS 帧， 以使所述历史存量站点根据所述 CTS帧在包含所述主信道在内的信道上发送数据且使所述新增站点根据所述 CTS帧在所述历史存量站点未占用的次信道上发送数据。
5、 根据权利要求 4所述的方法， 其特征在于， 所述新增站点调度指示信 息， 包括：
待调度的新增站点的标识； 或者，
可调度的一组新增站点的标识； 或者，
指示标识位的指示状态信息。
6、 根据权利要求 1〜5中任一项所述的方法， 其特征在于， 在所述历史存 量站点和新增站点完成数据发送之后， 还包括：
在包含所述主信道在内的信道上向所述历史存量站点发送第一确认帧， 所述第一确认帧中包含用于指示所述历史存量站点的数据是否正确传输的信 息；
在所述历史存量站点未占用的次信道上向所述新增站点发送第二确认 帧， 所述第二确认帧中包含用于指示所述新增站点的数据是否正确传输的信 息。
7、 根据权利要求 6所述的方法， 其特征在于， 所述指示帧和 /或所述确 认帧采用 OFDMA方式传输。
8、 根据权利要求 1〜5中任一项所述的方法， 其特征在于， 所述指示帧中 还包含所述历史存量站点所占用的带宽和预留的时间长度， 和 /或， 所述新增 站点能使用的带宽和传输时长。
9、 一种数据传输方法， 其特征在于， 包括：
接收接入点发送的指示帧；
根据所述指示帧在历史存量站点未占用的次信道上发送数据。
10、 根据权利要求 9所述的方法， 其特征在于， 所述接收接入点发送的 指示帧， 根据所述指示帧在历史存量站点未占用的次信道上发送数据， 包括： 接收所述接入点在所述历史存量站点未占用的次信道上发送的调度帧； 根据所述调度帧在所述历史存量站点未占用的次信道上发送数据。
11、 根据权利要求 10所述的方法， 其特征在于， 所述接收接入点在所述 历史存量站点未占用的次信道上发送的调度帧， 根据所述调度帧在所述历史 存量站点未占用的次信道上发送数据， 包括：
接收所述接入点在所述历史存量站点未占用的次信道上发送的包含新增 站点的标识的调度帧， 根据所述标识确定被调度后在所述历史存量站点未占 用的次信道上发送数据； 或者，
接收所述接入点发送的包含可调度的一组新增站点的标识的调度帧， 根 据数据发送需求在所述历史存量站点未占用的次信道上发送数据。
12、 根据权利要求 9所述的方法， 其特征在于， 所述接收接入点发送的 指示帧， 根据所述指示帧在历史存量站点未占用的次信道上发送数据， 包括： 接收所述接入点在包含所述主信道在内的信道上发送的包含新增站点调 度指示信息的 CTS帧；
根据所述 CTS帧在所述历史存量站点未占用的次信道上发送数据。
13、 根据权利要求 12所述的方法， 其特征在于， 所述新增站点调度指示 信息， 包括：
待调度的新增站点的标识； 或者，
可调度的一组新增站点的标识； 或者，
指示标识位的指示状态信息。
14、 根据权利要求 9〜13中任一项所述的方法， 其特征在于， 在根据所述 指示帧在历史存量站点未占用的次信道上发送完数据之后， 还包括：
接收所述接入点在历史存量站点未占用的次信道上发送的第二确认帧， 所述指示帧和 /或所述第二确认帧采用 OFDMA方式传输；
所述根据所述指示帧在历史存量站点未占用的次信道上发送数据包括： 根据所述指示帧在历史存量站点未占用的次信道上采用 OFDMA方式发 送数据。
15、 根据权利要求 9〜13中任一项所述的方法， 其特征在于， 所述指示帧 中还包含所述历史存量站点所占用的带宽和预留的时间长度， 和 /或， 所述新 增站点能使用的带宽和传输时长；
所述根据所述指示帧在所述历史存量站点未占用的次信道上发送数据之 前， 包括：
解析所述指示帧， 获取所述历史存量站点所占用的带宽和预留的时间长 度， 和 /或， 所述新增站点能使用的带宽和传输时长； 所述根据所述指示帧在所述历史存量站点未占用的次信道上发送数据， 包括：
根据获取的所述历史存量站点所占用的带宽和预留的时间长度， 和 /或， 所述新增站点能使用的带宽和传输时长在所述历史存量站点未占用的次信道 上发送数据。
16、 一种数据传输方法， 其特征在于， 包括：
监听所述历史存量站点发送的数据帧；
解析所述历史存量站点发送的数据帧帧头获知所述历史存量站点的传输 带宽和传输时长；
根据获知的所述历史存量站点的传输带宽和传输时长在所述历史存量站 点未占用的次信道上发送数据， 发送数据的结束时刻不能超过所述历史存量 站点的传输结束时刻。
17、 一种数据传输装置， 其特征在于， 包括：
接收模块， 用于接收历史存量站点在包含主信道在内的信道上发送的发 送请求 RTS帧；
发送模块， 用于向所述历史存量站点和新增站点发送指示帧， 以使所述 历史存量站点根据所述指示帧在包含所述主信道在内的信道上发送数据且使 所述新增站点根据所述指示帧在所述历史存量站点未占用的次信道上发送数 据。
18、 根据权利要求 17所述的装置， 其特征在于， 所述发送模块包括： 第一发送单元， 用于在包含所述主信道在内的信道上向所述历史存量站 点发送发送无阻 CTS帧，以使所述历史存量站点根据所述 CTS帧在包含所述 主信道在内的信道上发送数据；
第二发送单元， 用于在所述历史存量站点未占用的次信道上向所述新增 站点发送调度帧， 以使所述新增站点根据所述调度帧在所述历史存量站点未 占用的次信道上发送数据。
19、 根据权利要求 18所述的装置， 其特征在于， 所述第二发送单元具体 用于：
在所述历史存量站点未占用的次信道上向所述新增站点发送包含所述新 增站点的标识的调度帧， 以使所述新增站点根据所述标识确定被调度后在所 述历史存量站点未占用的次信道上发送数据； 或者，
向所述新增站点发送包含可调度的一组新增站点的标识的调度帧， 以使 所述一组新增站点根据数据发送需求在所述历史存量站点未占用的次信道上 发送数据。
20、根据权利要求 17所述的装置，其特征在于，所述发送模块具体用于： 在包含所述主信道在内的信道上向所述历史存量站点和所述新增站点发 送包含新增站点调度指示信息的 CTS 帧， 以使所述历史存量站点根据所述 CTS帧在包含所述主信道在内的信道上发送数据且使所述新增站点根据所述 CTS帧在所述历史存量站点未占用的次信道上发送数据。
21、 根据权利要求 20所述的装置， 其特征在于， 所述新增站点调度指示 信息， 包括：
待调度的新增站点的标识； 或者，
可调度的一组新增站点的标识； 或者，
指示标识位的指示状态信息。
22、 根据权利要求 17〜21 中任一项所述的装置， 其特征在于， 所述发送 模块还用于：
在历史存量站点和新增站点完成数据发送之后， 在包含所述主信道在内 的信道上向所述历史存量站点发送第一确认帧， 所述第一确认帧中包含用于 指示所述历史存量站点的数据是否正确传输的信息；
在所述历史存量站点未占用的次信道上向所述新增站点发送第二确认 帧， 所述第二确认帧中包含用于指示所述新增站点的数据是否正确传输的信 息。
23、 根据权利要求 22 所述的装置， 其特征在于， 所述指示帧和 /或所述 确认帧采用 OFDMA方式传输。
24、 根据权利要求 17〜21 中任一项所述的装置， 其特征在于， 所述指示 帧中还包含所述历史存量站点所占用的带宽和预留的时间长度， 和 /或， 所述 新增站点能使用的带宽和传输时长。
25、 一种数据传输装置， 其特征在于， 包括：
接收模块， 用于接收接入点发送的指示帧；
发送模块， 用于根据所述指示帧在历史存量站点未占用的次信道上发送 数据。
26、 根据权利要求 25所述的装置， 其特征在于， 所述接收模块具体用于 接收所述接入点在所述历史存量站点未占用的次信道上发送的调度帧；
所述发送模块具体用于根据所述调度帧在所述历史存量站点未占用的次 信道上发送数据。
27、 根据权利要求 26所述的装置， 其特征在于， 所述接收模块具体用于 接收所述接入点在所述历史存量站点未占用的次信道上发送的包含新增站点 的标识的调度帧；
所述发送模块具体用于根据所述标识确定被调度后在所述历史存量站点 未占用的次信道上发送数据； 或者，
所述接收模块具体用于接收所述接入点发送的包含可调度的一组新增站 点的标识的调度帧；
所述发送模块具体用于根据数据发送需求在所述历史存量站点未占用的 次信道上发送数据。
28、 根据权利要求 25所述的装置， 其特征在于， 所述接收模块具体用于 接收所述接入点在包含所述主信道在内的信道上发送的包含新增站点调度指 示信息的 CTS帧；
所述发送模块具体用于根据所述 CTS帧在所述历史存量站点未占用的次 信道上发送数据。
29、 根据权利要求 28所述的装置， 其特征在于， 所述新增站点调度指示 信息， 包括：
待调度的新增站点的标识； 或者，
可调度的一组新增站点的标识； 或者，
指示标识位的指示状态信息。
30、 根据权利要求 25〜29中任一项所述的装置， 其特征在于， 所述接收 模块还用于在根据所述指示帧在所述历史存量站点未占用的次信道上发送完 数据之后接收所述接入点在所述历史存量站点未占用的次信道上发送的第二 确认帧， 所述指示帧和 /或所述第二确认帧采用 OFDMA方式传输；
所述发送模块具体用于根据所述指示帧在所述历史存量站点未占用的次 信道上采用 OFDMA方式发送数据。
31、 根据权利要求 25〜29中任一项所述的装置， 其特征在于， 所述指示 帧中还包含所述历史存量站点所占用的带宽和预留的时间长度， 和 /或， 所述 新增站点能使用的带宽和传输时长；
所述装置还包括：
解析模块， 用于在所述根据所述指示帧在所述历史存量站点未占用的次 信道上发送数据之前， 解析所述指示帧， 获取所述历史存量站点所占用的带 宽和预留的时间长度， 和 /或， 所述新增站点能使用的带宽和传输时长； 所述发送模块具体用于根据获取的所述历史存量站点所占用的带宽和预 留的时间长度， 和 /或， 所述新增站点能使用的带宽和传输时长在所述历史存 量站点未占用的次信道上发送数据。
32、 一种数据传输装置， 其特征在于， 包括：
监听模块， 用于监听历史存量站点发送的数据帧；
解析模块， 用于解析所述历史存量站点发送的数据帧帧头获知所述历史 存量站点的传输带宽和传输时长；
发送模块， 用于根据获知的所述历史存量站点的传输带宽和传输时长在 所述历史存量站点未占用的次信道上发送数据， 发送数据的结束时刻不能超 过所述历史存量站点的传输结束时刻。
33、 一种数据传输***， 其特征在于， 包括权利要求 17-24 中任一项所 述的数据传输装置和权利要求 25-32中任一项所述的数据传输装置。
PCT/CN2013/083940 2013-02-06 2013-09-22 数据传输方法、装置和*** WO2014121615A1 (zh)

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