WO2015131832A1 - Procédé d'envoi de données, appareil et système associés - Google Patents

Procédé d'envoi de données, appareil et système associés Download PDF

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Publication number
WO2015131832A1
WO2015131832A1 PCT/CN2015/073666 CN2015073666W WO2015131832A1 WO 2015131832 A1 WO2015131832 A1 WO 2015131832A1 CN 2015073666 W CN2015073666 W CN 2015073666W WO 2015131832 A1 WO2015131832 A1 WO 2015131832A1
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Prior art keywords
sta
sent
uplink data
stas
message
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PCT/CN2015/073666
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English (en)
Chinese (zh)
Inventor
树贵明
杜振国
丁志明
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华为终端有限公司
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Publication of WO2015131832A1 publication Critical patent/WO2015131832A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/04—Scheduled or contention-free access
    • H04W74/06—Scheduled or contention-free access using polling

Definitions

  • the present invention relates to the field of communications, and in particular, to an uplink data sending method, related device, and system.
  • STAs stations
  • APs access points
  • BSS basic service set
  • the STA and the channel resources used by the AP are controlled and managed to reasonably allocate the occupation time of each STA and AP to the channel to reduce collisions.
  • the distributed control mechanism or centralized control mechanism defined in the current 802.11 standard has low control efficiency. When a certain STA obtains the right to use the channel, it always exclusively enjoys the entire channel spectrum; specifically, The uplink data transmission mechanism defined in the current 802.11 standard is as follows:
  • the AP indicates a time period as a contention-free period through a beacon frame, so that the STA that needs to send uplink data is in an awake state during the time period indicated by the beacon frame, and waits for the AP to be unicastly sent.
  • the polling message (CF-Poll)
  • the STA that receives the CF-Poll message transmits data after delaying the Short Interframe Space (SIFS) time interval.
  • SIFS Short Interframe Space
  • the value of the duration/identification field indicates the frame duration;
  • the first address field indicates the 48-bit MAC of the STA that receives the CF-Poll poll frame.
  • the address that is, the 48-bit MAC address of the STA being polled;
  • the second address field indicates the 48-bit MAC address of the AP that transmitted the CF-Poll poll frame;
  • the third address field indicates The source address of the data in the frame, here is the MAC address of the AP; the sequence control, the quality of service control, the high-speed transmission control (High Throughput Control), etc. Control related information.
  • the AP can only poll one STA at a time, so that the channel resource management or control mode is inefficient, especially in the application scenario of a dense STA, when each STA and the AP communicate data amount each time.
  • the spectrum utilization efficiency is lower and the communication efficiency is not high.
  • the technical problem to be solved by the embodiments of the present invention is to provide an uplink data sending method, a related device, and a system, so as to improve channel usage efficiency.
  • an embodiment of the present invention provides an uplink data sending method, including:
  • the access point AP sends a broadcast frame to the station STA, where the broadcast frame includes time information for indicating that the polling message is sent;
  • a plurality of different subchannels respectively send a polling message to the plurality of STAs that are polled, and are STAs that have uplink data to be sent among the plurality of polled STAs.
  • Allocating corresponding channel resources; the different subchannels are divided by different orthogonal subcarriers;
  • the method further includes:
  • the AP receives an association request message sent by the STA, where the association request message includes subchannel information indicating to the AP that the STA can receive a message.
  • the plurality of different subchannels are respectively sent to the plurality of STAs that are polled at the time indicated by the time information
  • the polling message is sent in parallel, and the corresponding channel resource is allocated to the STA that has uplink data to be sent, including:
  • the AP determines, by using the subchannel information, a subchannel that can receive a polling message for each of a plurality of STAs that have uplink data to be sent;
  • the AP determines, by using the subchannel information, that multiple STAs that have uplink data to send are respectively capable of receiving a polling message. Before the subchannel, it also includes:
  • the AP receives the data frame sent by the STA, and learns whether the STA has uplink data to send.
  • the data frame includes information used to indicate whether the STA has uplink data to send.
  • the multiple, different sub-channels are respectively sent to the plurality of STAs that are polled at the time indicated by the time information
  • the polling message is sent in parallel, and the corresponding channel resource is allocated to the STA that has uplink data to be sent, including:
  • the AP determines, by using the subchannel information, a subchannel that can receive a polling message for each of the plurality of STAs that are polled;
  • the STAs send the corresponding CTS messages in parallel.
  • the first address field in the polling message includes an association identifier for indicating the STA that is polled, and is a STA Allocated channel resource information.
  • the second address field in the polling response message includes an association identifier of the STA that is used to send the polling response message, And channel resource information required by the STA.
  • the first address field of the CTS message includes an association identifier for indicating a STA that receives the CTS message, and is a STA Allocated channel resource information.
  • an uplink data sending method including:
  • the station STA receives a broadcast frame sent by the access point AP, where the broadcast frame includes time information for indicating that a polling message is sent, and the STA is a STA that has uplink data to be sent by multiple STAs polled by the AP. one of the;
  • the channel resource is, after the broadcast frame is sent by the AP, at a time indicated by the time information, in a plurality of different subchannels And transmitting, to the plurality of STAs that are polled, a polling message, and correspondingly allocated channel resources for the STAs that are to be sent by the uplink data, where the different subchannels are different.
  • the STA transmits uplink data on the channel resource in parallel with STAs that have uplink data to be transmitted among other polled multiple STAs.
  • the STA after receiving the broadcast frame sent by the access point AP, the STA further includes:
  • the STA sends an association request message to the AP, where the association request message includes subchannel information indicating to the AP that the STA can receive a message.
  • the receiving, by the STA, the channel resource that is sent by the AP and corresponding to the STA includes:
  • the plurality of STAs that are transmitted respectively determine a subchannel that can receive the polling message, and transmit a polling message that is sent to the plurality of STAs in parallel on the determined plurality of subchannels at the time indicated by the time information.
  • the method before the STA receives the polling message sent by the AP, the method further includes:
  • the polling message is specifically that the AP determines, by using the subchannel information, that multiple STAs to be sent with uplink data can receive a round. And a polling message that is sent to the plurality of STAs in parallel on the determined plurality of subchannels at a time indicated by the time information.
  • the receiving, by the STA, the channel resource that is sent by the AP and corresponding to the STA includes:
  • a polling message sent by the AP where the polling message is that the AP determines, by using the subchannel information, a subchannel that can receive a polling message, for each of the polled multiple STAs, where The time indicated by the time information, and the polling message is sent in parallel to the plurality of STAs that are polled, respectively, in the determined plurality of subchannels;
  • the STA a polling response message to the AP, where the polling response message includes channel resource information required by the STA;
  • the CTS message includes channel resource information allocated for the STA corresponding to the STA; the CTS message is a channel required by the AP to be sent by the STA according to the uplink data.
  • the resource information is used to generate a corresponding acknowledgment transmission CTS message for the plurality of STAs to be sent with the uplink data, and determine, by using the subchannel information, a plurality of different STAs that are to be sent with the uplink data to receive the CTS message.
  • a subchannel, and a corresponding CTS message transmitted in parallel on the plurality of different subchannels to a plurality of STAs having uplink data to be transmitted.
  • the first address field in the polling message includes an association identifier of the STA, and a channel allocated to the STA Resource information.
  • the second address field in the polling response message includes an association identifier of the STA, and required by the STA Channel resource information.
  • the first address field of the CTS message includes an association identifier of the STA, and channel resource information allocated to the STA .
  • the AP allocates multiple subchannels to the STA as the When the STA transmits the channel resource of the uplink data, when the STA sends the uplink data on the channel resource, the STA specifically copies the content of the physical frame header including the physical frame length information to the allocated multiple subchannels for parallel transmission.
  • an embodiment of the present invention provides a communication device, where the device is disposed in an access point AP, and the device includes:
  • a sending module configured to send a broadcast frame to the station STA, where the broadcast frame includes time information for indicating that the polling message is sent;
  • a channel resource allocation module configured to send, in a plurality of different subchannels, a polling message to the plurality of STAs that are polled, respectively, at the time indicated by the time information, and in the plurality of STAs that are polled STAs that have uplink data to be transmitted allocate corresponding channel resources; the different subchannels are divided by different orthogonal subcarriers;
  • the receiving module is configured to receive, by the STA that has uplink data to be sent, uplink data that is sent in parallel by using the corresponding allocated channel resource.
  • the receiving module is further configured to: after the sending module sends a broadcast frame to the STA, receive an association request message sent by the STA, the association The request message includes subchannel information indicating to the AP that the STA is capable of receiving a message.
  • the channel resource allocation module includes:
  • a first determining unit configured to determine, by using the subchannel information, a subchannel that can receive a polling message, respectively, for multiple STAs that have uplink data to be sent;
  • a first polling message sending unit configured to send a polling message to the plurality of STAs in parallel on the determined plurality of subchannels at a time indicated by the time information, where the polling message is included in the multiple STAs Corresponding to the allocated channel resource information.
  • the receiving module is further configured to: before the first determining unit determines, by using the subchannel information, that the plurality of STAs that are to be sent by the uplink data respectively receive the subchannel that can receive the polling message, receive the data frame sent by the STA;
  • the device also includes:
  • the learning module is configured to learn, according to the data frame, whether the STA has uplink data to send, and the data frame includes information used to indicate whether the STA has uplink data to send.
  • the channel resource allocation module includes:
  • a second determining unit configured to determine, by using the subchannel information, a subchannel capable of receiving a polling message for each of the plurality of STAs that are polled;
  • a second polling message sending unit configured to send a polling message to the plurality of STAs that are polled in parallel on the determined plurality of subchannels at the time indicated by the time information
  • a polling response receiving unit configured to receive a polling response message returned by the STA that has uplink data to be sent by the polled STA, where the polling response message includes the STA required to send the uplink data to the STA Channel resource information;
  • the acknowledgment transmission information generating unit is configured to generate, according to the required channel resource information, a corresponding acknowledgment and transmission CTS message for the plurality of STAs to be sent with the uplink data, where the CTS message includes multiple uplink data to be sent.
  • the STAs correspond to the allocated channel resource information;
  • Determining a transmitting unit configured to determine, by using the subchannel information, a plurality of different subchannels capable of receiving the CTS message for a plurality of STAs having uplink data to be transmitted, and having the plurality of different subchannels on the plurality of different subchannels
  • the plurality of STAs to which the uplink data is to be transmitted transmit the corresponding CTS message in parallel.
  • the first address field in the polling message includes an association identifier for indicating the STA that is polled, and is a STA Allocated channel resource information.
  • the second address field in the polling response message includes an association identifier of the STA that is used to send the polling response message, And channel resource information required by the STA.
  • the first address field of the CTS message includes an association identifier for indicating a STA that receives the CTS message, and is a STA Allocated channel resource information.
  • the present invention provides an uplink data sending apparatus, where the apparatus is disposed in a station STA, and the apparatus includes:
  • a receiving module configured to receive a broadcast frame sent by the access point AP, where the broadcast frame includes time information for indicating to send a polling message, where the STA is uplink data that is sent by multiple STAs polled by the AP Receiving one of the transmitted STAs; receiving, by the AP, a channel resource allocated for the STA; the channel resource is, after the broadcast frame is sent by the AP, at a time indicated by the time information, in multiple Different subchannels respectively send polling messages to the plurality of polled STAs, and correspondingly allocated channel resources for STAs that have uplink data to be sent among the plurality of polled STAs;
  • the subchannels are divided by different orthogonal subcarriers;
  • a sending module configured to send, on the channel resource, uplink data in parallel with STAs that have uplink data to be sent among other polled multiple STAs.
  • the sending module is further configured to: after the receiving module receives a broadcast frame sent by the access point AP, send an association request message to the AP, where
  • the association request message includes subchannel information indicating to the AP that the STA is capable of receiving a message.
  • the receiving module is configured to receive, by the AP, a channel resource that is allocated by the AP to be corresponding to: Receiving, by the module, a polling message sent by the AP, where the polling message includes channel resource information allocated for the STA, and the polling message is that the AP sends the uplink data by using the subchannel information.
  • the plurality of STAs respectively determine a subchannel capable of receiving the polling message, and transmit a polling message to the plurality of STAs in parallel on the determined plurality of subchannels at the time indicated by the time information.
  • the sending module is further configured to: before the receiving module receives the polling message sent by the AP, to the AP Transmitting a data frame, where the data frame includes information indicating whether the STA has uplink data to send;
  • the polling message is specifically that the AP determines, by using the subchannel information, that multiple STAs to be sent with uplink data can receive a round. Inquiring the subchannel of the message, and at the time indicated by the time information, A polling message transmitted to the plurality of STAs in parallel on the determined plurality of subchannels according to channel resource information required by the STA to which the uplink data is to be transmitted.
  • the receiving module is specifically configured to receive a broadcast frame sent by an access point AP, where the broadcast frame includes a Receiving a time information of the message, receiving a polling message sent by the AP, where the polling message is that the AP determines, by using the subchannel information, a subchannel that can receive a polling message, for each of the polled multiple STAs, And transmitting, at the time indicated by the time information, the polling message to the plurality of STAs that are polled, respectively, in the determined plurality of subchannels;
  • the device further includes a polling response returning module, configured to return a polling response message to the AP after the receiving module receives the polling message sent by the AP, where the polling response message includes the STA Required channel resource information;
  • the receiving module is further configured to receive an acknowledgment and send CTS message sent by the AP, where the CTS message includes channel resource information that is allocated to the STA, and the CTS message is sent by the AP according to the uplink data.
  • the channel resource information required by the STA generates a corresponding acknowledgment and transmission CTS message for the plurality of STAs to be sent with the uplink data, and determines, by using the subchannel information, that the plurality of STAs that have uplink data to be sent can receive the CTS message. And a plurality of different subchannels, and corresponding CTS messages transmitted in parallel on the plurality of different subchannels to a plurality of STAs having uplink data to be transmitted.
  • the first address field in the polling message includes an association identifier of the STA, and a channel allocated to the STA Resource information.
  • the second address field in the polling response message includes an association identifier of the STA, and required by the STA Channel resource information.
  • the first address field of the CTS message includes an association identifier of the STA, and channel resource information allocated to the STA .
  • the device further includes a content replication sending module, configured to allocate, by the AP, the multiple sub-channels to the STA as a channel resource for the STA to send uplink data.
  • the sending module is further configured to: when the uplink data is sent on the channel resource, specifically copy the content of the physical frame header that includes the physical frame length information to the allocated multiple subchannels for parallel transmission.
  • an embodiment of the present invention provides a communication system, including an access point device and a site device, where
  • the access point device includes the third aspect, or the first possible implementation manner of the third aspect, or the second possible implementation manner of the third aspect, or the third possible implementation manner of the third aspect, Or a fourth possible implementation of the third aspect, or a fifth possible implementation of the third aspect, or a sixth possible implementation of the third aspect, or a seventh possible implementation of the third aspect Communication device in the mode;
  • the site device includes the fourth aspect, or the first possible implementation of the fourth aspect, or the second possible implementation of the fourth aspect, or the third possible implementation of the fourth aspect, or a fourth possible implementation of the fourth aspect, or a fifth possible implementation of the fourth aspect, or a sixth possible implementation of the fourth aspect, or a seventh possible implementation of the fourth aspect, Or an uplink data transmitting apparatus in an eighth possible implementation manner of the fourth aspect.
  • the access point AP indicates the sending time of the polling message by using the broadcast frame, and sends the polling message to the polled multiple STAs in parallel through at least two different subchannels, and sends the uplink data for the request.
  • the STA allocates a corresponding channel resource, and the different subchannels are divided by different orthogonal subcarriers, and receive uplink data that the STA uses the corresponding allocated channel resources to send in parallel; the AP can poll multiple STAs at a time, and Multiple STAs can simultaneously transmit data in parallel using the channel, which solves the technical problem that the AP can only poll one STA at a time, which makes the channel resource management or control mode inefficient, and greatly improves spectrum utilization efficiency and channel use efficiency. .
  • FIG. 1 is a schematic diagram of a format of a polling message in the prior art
  • FIG. 2 is a schematic flowchart of an uplink data sending method provided by the present invention
  • FIG. 3 is a schematic flowchart diagram of another embodiment of an uplink data sending method provided by the present invention.
  • FIG. 4 is a schematic diagram of a format of a polling message according to an embodiment of the present invention.
  • FIG. 5 is a schematic flowchart diagram of another embodiment of an uplink data sending method provided by the present invention.
  • FIG. 6 is a schematic diagram of a format of a polling response message according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of a format of a confirmation sending message according to an embodiment of the present invention.
  • FIG. 8 is a schematic flowchart diagram of another embodiment of an uplink data sending method provided by the present invention.
  • FIG. 9 is a schematic flowchart diagram of another embodiment of an uplink data sending method provided by the present invention.
  • FIG. 10 is a schematic flowchart diagram of another embodiment of an uplink data sending method provided by the present invention.
  • FIG. 11 is a schematic structural diagram of a communication apparatus provided by the present invention.
  • FIG. 12 is a schematic structural diagram of a channel resource allocation module provided by the present invention.
  • FIG. 13 is a schematic structural diagram of another embodiment of a communication apparatus according to the present invention.
  • FIG. 14 is a schematic structural diagram of another embodiment of a channel resource allocation module provided by the present invention.
  • 15 is a schematic structural diagram of an uplink data transmitting apparatus provided by the present invention.
  • 16 is a schematic structural diagram of another embodiment of an uplink data sending apparatus provided by the present invention.
  • FIG. 17 is a schematic structural diagram of an access point device provided by the present invention.
  • FIG. 18 is a schematic structural diagram of a site device provided by the present invention.
  • Figure 19 is a block diagram showing the structure of a communication system provided by the present invention.
  • FIG. 2 is a schematic flowchart of an uplink data sending method provided by the present invention, where the method includes:
  • Step S200 The access point AP sends a broadcast frame to the station STA, where the broadcast frame includes time information for indicating that the polling message is sent.
  • the broadcast frame in the embodiments of the present invention includes, but is not limited to, a beacon frame.
  • the embodiment of the present invention uses a beacon frame as an example for description; the AP may indicate a subsequent beacon in a periodically transmitted beacon frame.
  • Time information used for uplink data transmission, such as start time, duration, period, etc., or the transmission time of polling messages, etc., so that STAs with uplink data transmission (that is, data needs to be sent) can be in the AP.
  • the time of polling the data transmission or the sending time of the polling message remains in the Awake state, and receives the polling message sent by the AP;
  • Step S202 Send a polling message to the plurality of polled STAs in parallel on the plurality of different subchannels at the time indicated by the time information, and have uplink data for the plurality of polled STAs.
  • the transmitted STA allocates corresponding channel resources; the different subchannels are divided by different orthogonal subcarriers;
  • the working channel of the AP may be divided into several orthogonal subcarriers, and one or more subcarriers are grouped into one subchannel, and each subchannel may be used to send an uplink frame or a downlink frame, when used to send an uplink frame,
  • a channel may be referred to as an uplink subchannel.
  • a subchannel When a downlink frame is sent, a subchannel may be referred to as a downlink subchannel, but the same subchannel is used to transmit an uplink frame and a downlink frame is transmitted at a different time, and the AP may simultaneously concurrently on different subchannels.
  • a downlink frame is separately sent to multiple STAs, and multiple STAs may simultaneously send uplink frames to the AP in parallel using different subchannels.
  • Step S204 Receive uplink data that is sent by the STAs that have uplink data to be transmitted in parallel by using corresponding allocated channel resources.
  • the embodiment of the present invention may further include: the AP receiving an association request message sent by the STA, where the association request message includes a subchannel that the STA indicates to the AP that the STA can receive a message. information. Specifically, when the STA performs an association operation with the AP, the STA indicates the subchannel supported by the STA to the AP through the association request message, and/or the subchannel that the STA itself receives the polling message.
  • STA support Orthogonal Frequency Division Multiple Access (OFDMA) mechanism.
  • OFDMA Orthogonal Frequency Division Multiple Access
  • step S202 the corresponding channel resource information is allocated by the STA that carries the uplink data transmission in the polling message, or the uplink data is carried as the request by the Clear To Send (CTS) message sent in the polling process.
  • CTS Clear To Send
  • the STA allocates the corresponding channel resource information, and can select one of the two schemes to implement the specific implementation. The following details are illustrated by using FIG. 3 to FIG. 6 :
  • FIG. 3 is a schematic flowchart diagram of another embodiment of an uplink data sending method provided by the present invention, including:
  • Step S300 The access point AP sends a beacon frame to the station STA, where the beacon frame includes time information for indicating that the polling message is sent.
  • Step S302 Receive an association request message sent by the STA, where the association request message includes subchannel information indicating to the AP that the STA can receive a message;
  • steps S300 and S302 may correspond to the related description in the embodiment of FIG. 2, and details are not described herein again.
  • Step S304 determining, by using the subchannel information, a subchannel that can receive a polling message for each of a plurality of STAs that have uplink data to be sent;
  • the AP may further receive, by receiving the data frame sent by the STA, whether the STA has uplink data to be sent, that is, the uplink data transmission requirement of the STA is learned, and the STA may follow the existing uplink data.
  • the sending mechanism (such as the periodic data sending, the distributed data sending mechanism, and the like) sends a data frame, where the data frame includes information for indicating whether the STA has uplink data to be sent, that is, the AP sends the data according to the existing uplink data by the receiving STA.
  • the data frame sent by the mechanism can obtain whether the STA has data amount information to be sent or whether there is bandwidth resource information required for sending data.
  • Step S306 Send a polling message to the plurality of STAs in parallel on the determined plurality of subchannels, where the polling message includes a channel resource corresponding to the multiple STAs;
  • the AP may allocate channel resources to the multiple STAs according to the required channel resource information; in detail, the AP may be based on Channel resource information required by each STA that has uplink data transmission
  • the corresponding allocated channel resources are determined for each STA that has uplink data transmission.
  • the format of the polling message in the embodiment of the present invention is shown in FIG.
  • the first address field in the inquiry message includes an association identifier for indicating the STA being polled, and channel resource information allocated for the STA; in detail, the format of the CF-POLL message in the embodiment of the present invention is compared with the existing standard.
  • the format of the CF-POLL message is improved, that is, the information carried in the CF-POLL message of the existing 802.11 standard for indicating the STA in the 48-bit MAC address field Address 1 of the STA receiving the polling message is redefined, A part of it is used to indicate the association identifier of the STA being polled, and the remaining part is used for channel resource information allocated for the STA, for example, as shown in FIG. 4, 16 of the binary bits (ie, the association identifier in FIG. 4) a 16-bit association identifier (AID) for indicating the STA being polled, and using the remaining 32 binary bits to indicate the channel resource allocated by the AP to the polled STA (such as the channel resource in FIG.
  • the 8 bits represent the mapping of the subchannels allocated by the AP to the STA. That is, the AP allocates those subchannels to the STA, and the corresponding bits are set to "1", otherwise it is set to "0", and 8 of them are used. Indicates the delay time of the channel resource (subchannel usage time) allocated for the STA with respect to the current time, and finally the remaining 16 bits indicating the duration of the channel resource allocated for the STA (the duration of the subchannel can be used).
  • the format of the CF-POLL message shown in FIG. 4 is only one of the embodiments.
  • the format of the CF-POLL message in the embodiment of the present invention is not limited to the format shown in FIG. 4, for example, not limited to the figure.
  • the 16 binary bits in 4 are used to indicate the 16-bit association identifier AID of the polled STA, and the communication parties can negotiate 8 binary bits or other number of binary bits to represent the associated identifier AID of the polled STA; And not limited to 8 bits out of 32 binaryes to represent a map of subchannels allocated by the AP for the STA, may be a map of subchannels allocated by the AP for the STA by 16 bits or other digits, etc., as long as The two sides of the communication can negotiate.
  • Step S308 Receive uplink data that is sent by the STAs that have uplink data to be transmitted in parallel by using the corresponding allocated channel resources.
  • FIG. 5 is a schematic flowchart diagram of another embodiment of an uplink data sending method provided by the present invention, including:
  • Step S500 The access point AP sends a beacon frame to the station STA, where the beacon frame is included for Indicates the time information for sending the polling message;
  • Step S502 Receive an association request message sent by the STA, where the association request message includes subchannel information indicating to the AP that the STA can receive a message;
  • steps S500 and S502 may correspond to the description in the embodiment of FIG. 2, and details are not described herein again.
  • Step S504 Determine, by using the subchannel information, a subchannel that can receive a polling message for each of the plurality of STAs that are polled;
  • Step S506 At the time indicated by the time information, send a polling message to the plurality of STAs that are polled in parallel on the determined plurality of subchannels;
  • the AP may determine, according to the subchannel information indicated when each STA is associated, the polling subchannel that each STA can receive the polling message, and then the AP transmits the polling data transmission time or the polling message sending time.
  • the polling message CF-POLL is unicastly transmitted to multiple STAs simultaneously in parallel on the polling subchannels corresponding to the respective polled STAs, wherein the format of the CF-POLL message is the same as the message format defined in the current 802.11 standard.
  • Step S508 Receive a polling response message returned by the STA that is to be sent by the uplink data in the polled STA, where the polling response message includes channel resource information required by the STA to which the uplink data is to be sent.
  • the STA that receives the polling message may send a polling response message to the AP after the time of delaying the SIFS; in detail, if the STA has data to be sent, the polling acknowledgement may be sent to the AP (Contention-Free Acknowledgement, CF) - ACK) message (that is, the polling response message may be a CF-ACK message at this time), and carries the channel resource information required by the STA for uplink data transmission (ie, may be the amount of data to be sent or required)
  • the channel bandwidth indication information may be: if the polled STA has no data to be sent, the null (Null) message may be sent to the AP (that is, the polling response message may be a Null message at this time); and in detail, as shown in FIG.
  • a format diagram of a polling response message in the embodiment of the present invention is a format of a CF-ACK message that is sent to an AP when the STA has data to be sent.
  • the format of the CF-ACK message in the embodiment of the present invention is relative to the existing standard.
  • the format of the CF-ACK message is improved, that is, the second address field (Address 2 field) of the original CF-ACK message indicating the STA that sent the polling response message (that is, the polled STA), that is, Address carried in the 48-bit MAC address field
  • the information has been redefined, An association identifier for indicating a STA that sends a polling response, and channel resource information required by the STA, for example, as shown in FIG.
  • the 16-bit association identifier AID of the STA that polls the response message uses the remaining 32 binary bits to indicate the channel bandwidth information required by the polled STA (see Figure 6).
  • Medium channel resource) or the amount of data to be transmitted, as for the required channel bandwidth information 8 bits of which can be used to represent the mapping of the subchannels required by the STA, that is, the STA requests to use those subchannels, and those corresponding bits are set. It is “1”, otherwise it is set to “0”, and 16 bits are used to indicate the duration of the channel resource requested by the STA.
  • the number of bytes of data to be sent can be expressed and reserved. The remaining 8 digits are not used.
  • the format of the polling response message shown in FIG. 6 is only one of the embodiments.
  • the format of the polling response message in the embodiment of the present invention is not limited to the format shown in FIG. 6, for example, not limited to the figure.
  • the 16 binary bits in 6 are used to represent the 16-bit Association identifier (AID) of the polled STA, and the communication parties can negotiate 8 binary bits or other number of binary bits to represent the polled STA.
  • Correlation identifier AID similarly, it is not limited to 8 bits to represent the mapping of subchannels required by the STA, and may be a bitmap of sub-channels requested by the STA for 16 bits or other digits, etc., as long as the communication parties negotiate Ok.
  • Step S510 Generate, according to the required channel resource information, a corresponding acknowledgment and transmission CTS message for multiple STAs to be sent with uplink data, where the CTS message includes corresponding allocations for multiple STAs to be sent with uplink data.
  • Channel resource information ;
  • Step S512 determining, by using the subchannel information, a plurality of different subchannels capable of receiving the CTS message for a plurality of STAs to be sent with uplink data, and having uplink data on the plurality of different subchannels Sending multiple STAs to send corresponding CTS messages in parallel;
  • the AP is the polled multiple STAs according to the required channel resource information (that is, the bandwidth request information or the data volume information to be sent) carried in the CF-ACK message sent by the multiple STAs.
  • the required channel resource information that is, the bandwidth request information or the data volume information to be sent
  • each STA can receive the polling subchannel of the CTS message carrying the resource allocation information, and generate a corresponding acknowledgement sending CTS message, and then concurrently
  • a CTS message including channel resource allocation information is separately transmitted to the STA on the polling subchannel of each of the polled STAs, where the format of the CTS message is as shown in FIG.
  • the format of the CTS message in the embodiment of the present invention is improved on the format of the CTS message in the existing 802.11 standard, and is used as a resource allocation message for the AP to perform channel resource allocation for the STA, which is used in the CTS message in the existing standard.
  • the information carried in the first address field (Address 1 field) of the STA that receives the CTS message that is, the information carried in the 48-bit MAC address field, is used to indicate the association identifier of the STA that receives the CTS message, and Channel resource information allocated by the STA; for example, as shown in FIG. 7, 16 bits (the association identifier in FIG.
  • the remaining 32 are used to indicate the 16-bit association identifier AID of the STA that receives the CTS message, and the remaining 32 are The binary bit is used to indicate that the AP allocates channel resource information (such as the channel resource in FIG. 7) corresponding to the polled STA, such as a map in which 8 bits are used to indicate that the AP allocates a subchannel for the STA, that is, the AP allocates the STA. Those subchannels, those corresponding bits are set to "1", otherwise set to "0", and then 8 bits are used to indicate the delay time of the subchannel usage time allocated to the STA relative to the current time, and finally the remaining 16 indicates a duration used by the STA to the corresponding subchannel.
  • channel resource information such as the channel resource in FIG. 7
  • the polled STA such as a map in which 8 bits are used to indicate that the AP allocates a subchannel for the STA, that is, the AP allocates the STA.
  • the format of the CTS message shown in FIG. 7 is only one of the embodiments.
  • the format of the CTS message in the embodiment of the present invention is not limited to the format shown in FIG. 7, for example, not limited to 16 in FIG.
  • the binary bits are used to indicate the 16-bit association identifier AID of the polled STA, and the communication parties can negotiate 8 binary digits or other number of binary digits to represent the associated identifier AID of the polled STA; likewise, neither It is limited to 8 bits out of 32 binary to represent the mapping of the subchannel allocated by the AP to the STA, and may be a bitmap of the subchannel allocated by the AP for the STA by 16 bits or other digits, etc., as long as the communication parties negotiate well. Just fine.
  • Step S514 Receive uplink data that is sent by the STAs with uplink data to be transmitted in parallel by using corresponding allocated channel resources.
  • the AP may further include: after delaying the short frame interval SIFS, Different subchannels respectively send acknowledgment messages to the STAs in parallel.
  • the AP may respectively transmit the CF-POLL message to the STA after the time of delaying the SIFS, or the channel corresponding to the CF-POLL message sent to the STA in the embodiment of FIG. 3, or FIG. 5
  • the embodiment corresponds to a channel for transmitting a CTS message to a STA, or a STA On the subchannel used when transmitting the uplink data, the STA that successfully transmitted the uplink data transmits the acknowledgement message ACK in parallel.
  • the above embodiment is an embodiment for describing an uplink data transmission method from the AP side.
  • another implementation of the uplink data transmission method provided by the present invention shown in FIG. 8 is combined.
  • Step S800 The station STA receives the broadcast frame sent by the access point AP, where the broadcast frame includes time information for indicating the sending of the polling message, and the STA is the uplink data of the plurality of STAs polled by the AP.
  • the broadcast frame includes time information for indicating the sending of the polling message
  • the STA is the uplink data of the plurality of STAs polled by the AP.
  • the broadcast frame in the embodiments of the present invention includes but is limited to a beacon frame.
  • the embodiment of the present invention uses a beacon frame as an example for description.
  • the embodiment of the present invention may further include: the STA sending an association request message to the AP, where the association request message includes subchannel information indicating to the AP that the STA can receive a message.
  • Step S802 Receive a channel resource that is sent by the AP and corresponding to the STA.
  • the polling message is sent to the polled multiple STAs in parallel on multiple different subchannels at the time indicated by the time information. And corresponding to the allocated channel resources of the STAs to which the uplink data is to be sent, and the different subchannels are divided by different orthogonal subcarriers; reference may be made to the foregoing embodiment of FIG. 2
  • the AP is a channel resource corresponding to the STA that has uplink data transmission;
  • Step S804 Send uplink data on the channel resource in parallel with STAs that have uplink data to be sent among other polled multiple STAs.
  • the STA may obtain the channel resource information allocated for itself by receiving the polling message, or obtain the channel resource information allocated for itself by receiving the acknowledgement and sending the CTS message, and may select any one of the two schemes to implement the specific implementation. 9 and Figure 10 to elaborate:
  • FIG. 9 is a schematic flowchart diagram of another embodiment of an uplink data sending method provided by the present invention, including:
  • Step S900 The station STA receives the broadcast frame sent by the access point AP, where the broadcast frame includes time information for indicating the sending of the polling message, and the STA is the uplink data of the plurality of STAs polled by the AP.
  • the broadcast frame includes time information for indicating the sending of the polling message
  • the STA is the uplink data of the plurality of STAs polled by the AP.
  • Step S902 Send an association request message to the AP, where the association request message includes subchannel information indicating to the AP that the STA can receive a message;
  • Step S904 Send a data frame to the AP, where the data frame includes information used to indicate whether the STA has uplink data to be sent.
  • the data frame sent by the STA to the AP includes information indicating that the STA has uplink data to be sent;
  • Step S906 Receive a polling message sent by the AP, where the polling message includes channel resource information that is allocated to the STA, and the polling message is that the AP uses the subchannel information to have uplink data.
  • the first address field in the polling message includes an association identifier of the STA, and channel resource information allocated to the STA.
  • Step S908 Send uplink data on the channel resource in parallel with STAs that have uplink data to be transmitted among other polled multiple STAs.
  • this embodiment may refer to related descriptions in the embodiments of FIG. 3 and FIG. 4, and details are not described herein again.
  • FIG. 10 is a schematic flowchart diagram of another embodiment of an uplink data sending method provided by the present invention, including:
  • Step S1000 The station STA receives the broadcast frame sent by the access point AP, where the broadcast frame includes time information for indicating the sending of the polling message, and the STA is the uplink data of the plurality of STAs polled by the AP.
  • the broadcast frame includes time information for indicating the sending of the polling message
  • the STA is the uplink data of the plurality of STAs polled by the AP.
  • Step S1002 Send an association request message to the AP, where the association request message includes subchannel information indicating to the AP that the STA can receive a message;
  • Step S1004 Receive a polling message sent by the AP;
  • the polling message is the AP Determining, by the subchannel information, the subchannels capable of receiving the polling message for the plurality of STAs that are polled, respectively, at the time indicated by the time information, respectively, in the determined plurality of subchannels, respectively, to the plurality of STAs being polled Send a polling message;
  • Step S1006 Return a polling response message to the AP, where the polling response message includes channel resource information required by the STA;
  • the second address field in the polling response message includes an association identifier of the STA, and channel resource information required by the STA.
  • Step S1008 Receive an acknowledgment sending CTS message sent by the AP, where the CTS message includes channel resource information allocated for the STA corresponding to the STA; the CTS message is a channel required by the AP to send an STA according to the uplink data.
  • the resource information is used to generate a corresponding acknowledgment transmission CTS message for the plurality of STAs to be sent with the uplink data, and determine, by using the subchannel information, a plurality of different STAs that are to be sent with the uplink data to receive the CTS message.
  • the first address field of the CTS message includes an association identifier of the STA, and channel resource information allocated to the STA.
  • Step S1010 Send uplink data on the channel resource in parallel with STAs that have uplink data to be transmitted among other polled multiple STAs.
  • the present embodiment may correspond to the related description in the embodiments of FIG. 5 to FIG. 7 , and details are not described herein again.
  • the STA when the AP allocates multiple subchannels to the STA as the channel resource for the STA to send uplink data, the STA specifically sends the uplink data on the channel resource.
  • the content of the physical frame header containing the physical frame length information is copied to the allocated plurality of subchannels for parallel transmission.
  • the STA when the AP allocates multiple subchannels to the STA as the channel resource for transmitting the uplink data, the STA needs to copy the content of the physical frame header including the physical frame length information to each subchannel for parallel transmission, so that other STAs are receiving.
  • the network allocation vector (Network Allocation Vector) is set by using the frame length information of the corresponding physical frame header. NAV) time value, so that within the specified length of time, other STAs no longer compete for the corresponding subchannel.
  • NAV Network Allocation Vector
  • the STA does not use up the channel resources allocated by the AP when transmitting the data, it may choose to send all "0" data on the remaining channel resources to avoid other work under the distributed competition mechanism.
  • the STA preempts the channel when detecting that the channel is idle, thereby affecting the transmission of the subsequent acknowledgement message.
  • the access point AP indicates the sending time of the polling message by using the broadcast frame, and sends the polling message to the polled multiple STAs in parallel through at least two different subchannels, and sends the uplink data for the request.
  • the STA allocates a corresponding channel resource, and the different subchannels are divided by different orthogonal subcarriers, and receive uplink data that the STA uses the corresponding allocated channel resources to send in parallel; the AP can poll multiple STAs at a time, and Multiple STAs can simultaneously transmit data in parallel using the channel, which solves the technical problem that the AP can only poll one STA at a time, which makes the channel resource management or control mode inefficient, and greatly improves spectrum utilization efficiency and channel use efficiency. .
  • FIG. 11 is a schematic structural diagram of a communication apparatus provided by the present invention.
  • the communication apparatus is disposed in an access point AP.
  • the 110 communication apparatus 110 includes: a sending module 1100, a channel resource allocation module 1102, and a receiving module 1104.
  • the sending module 1100 is configured to send a broadcast frame to the station STA, where the broadcast frame includes time information for indicating that the polling message is sent;
  • the channel resource allocation module 1102 is configured to send, in a plurality of different subchannels, a polling message to the plurality of STAs that are polled, respectively, at the time indicated by the time information, and is used by the plurality of STAs that are polled.
  • STAs that have uplink data to be transmitted allocate corresponding channel resources; the different subchannels are divided by different orthogonal subcarriers;
  • the receiving module 1104 is configured to receive uplink data that is sent by the STAs that have uplink data to be sent in parallel by using corresponding allocated channel resources.
  • the receiving module 1104 is further configured to send the sending module 1100 to the STA.
  • the association request message After sending the broadcast frame, receiving an association request message sent by the STA, the association request message includes subchannel information indicating to the AP that the STA can receive a message.
  • the channel resource allocation module 1102 includes: a first determining unit 11020 and a first polling message sending unit 11022, wherein
  • the first determining unit 11020 is configured to determine, by using the subchannel information, a subchannel that can receive a polling message, respectively, for multiple STAs that have uplink data to be sent;
  • the first polling message sending unit 11022 is configured to send, in the determined multiple subchannels, a polling message to the plurality of STAs in parallel at the time indicated by the time information, where the polling message is included in the multiple STAs. Corresponding to the allocated channel resource information.
  • the communication apparatus 110 includes a sending module 1100, a channel resource allocation module 1102, and a receiving module 1104, and may further include a learning module 1106. ,among them
  • the receiving module 1104 is further configured to: before the first determining unit 11020 determines, by using the subchannel information, the plurality of STAs that are to be sent by the uplink data to respectively receive the subchannel that can receive the polling message, receive the data frame sent by the STA;
  • the learning module 1106 is configured to learn, according to the data frame, whether the STA has uplink data to send, and the data frame includes information used to indicate whether the STA has uplink data to send.
  • the channel resource allocation module 1102 includes: a second determining unit 11024, a second polling message sending unit 11026, and a round a response response receiving unit 11028, a confirmation transmission information generating unit 110210, and a determination transmitting unit 110212, wherein
  • the second determining unit 11024 is configured to determine, by using the subchannel information, the subchannels that can receive the polling message for the plurality of STAs that are polled, respectively;
  • the second polling message sending unit 11026 is configured to send a polling message to the plurality of STAs that are polled in parallel on the determined plurality of subchannels at the time indicated by the time information;
  • the polling response receiving unit 11028 is configured to receive a polling response message returned by the STA that has uplink data to be sent in the polled STA, where the polling response message includes the STA required to send the uplink data to the STA.
  • Channel resource information ;
  • the acknowledgment transmission information generating unit 110210 is configured to generate, according to the required channel resource information, a corresponding acknowledgment transmission CTS message for multiple STAs to be sent with uplink data, where the CTS message includes multiple uplink data to be sent.
  • the STAs correspond to the allocated channel resource information;
  • the determining sending unit 110212 is configured to determine, by using the subchannel information, a plurality of different subchannels capable of receiving the CTS message for a plurality of STAs having uplink data to be sent, and having the plurality of different subchannels on the plurality of different subchannels
  • the plurality of STAs to which the uplink data is to be transmitted transmit the corresponding CTS message in parallel.
  • the first address field in the polling message of the embodiment of the present invention includes an association identifier for indicating the STA being polled, and channel resource information allocated for the STA.
  • the second address field in the polling response message includes an association identifier for indicating a STA that sends a polling response message, and channel resource information required by the STA.
  • the first address field of the CTS message includes an association identifier for indicating a STA that receives the CTS message, and channel resource information allocated for the STA.
  • the sending module 1100 is further configured to: after the receiving module 1104 receives the uplink data that is sent by the STA in parallel by using the corresponding allocated channel resource, after delaying the short frame interval SIFS, in multiple different subchannels An acknowledgement message is sent to the STA in parallel.
  • FIG. 15 is a schematic structural diagram of an uplink data transmitting apparatus provided by the present invention.
  • the uplink data transmitting apparatus 150 is disposed in a station STA, and the uplink data sending apparatus 150 includes: a receiving module 1500 and a sending module 1502, where
  • the receiving module 1500 is configured to receive a broadcast frame sent by the access point AP, where the broadcast frame includes time information for indicating to send a polling message, where the STA is uplink data that is sent by multiple STAs polled by the AP.
  • the polling message is sent to the plurality of polled STAs in parallel on the plurality of different sub-channels, and is corresponding to the STAs that have uplink data to be sent among the plurality of polled STAs. Allocated channel resources; the different subchannels are divided by different orthogonal subcarriers;
  • the sending module 1502 is configured to send, on the channel resource, uplink data in parallel with STAs that have uplink data to be sent among other polled multiple STAs.
  • the sending module 1502 is further configured to: after the receiving module 1500 receives the broadcast frame sent by the access point AP, send an association request message to the AP, where the association request message includes indicating to the AP that the STA can receive Subchannel information for the message.
  • the receiving module 1500 is configured to receive, by the AP, a channel resource that is allocated by the AP, to receive a polling message sent by the AP, where the polling message includes a corresponding allocation for the STA.
  • Channel resource information the polling message is that the AP determines, by using the subchannel information, a plurality of STAs that have uplink data to be sent, and can determine a subchannel that can receive a polling message, and at a time indicated by the time information, A polling message transmitted in parallel to the plurality of STAs in the determined plurality of subchannels.
  • the sending module 1502 is further configured to: before the receiving module 1500 receives the polling message sent by the AP, send a data frame to the AP, where the data frame includes, to indicate whether the STA has uplink data.
  • the first address field in the polling message includes an association identifier of the STA, and channel resource information allocated to the STA.
  • the uplink data transmitting apparatus 150 includes: a receiving module 1500 and a sending module 1502, and may further include a polling response return. Module 1504, wherein
  • the receiving module 1500 may be specifically configured to receive a broadcast frame sent by the access point AP, where the broadcast frame includes time information for indicating that the polling message is sent, and receives a polling message sent by the AP, where the polling message is The AP through the subchannel information is respectively determined by multiple STAs that are polled. a subchannel capable of receiving a polling message, and transmitting, at a time indicated by the time information, a polling message to the plurality of STAs that are polled, respectively, in the determined plurality of subchannels;
  • the polling response returning module 1504 is configured to: after the receiving module 1500 receives the polling message sent by the AP, return a polling response message to the AP, where the polling response message includes channel resource information required by the STA;
  • the receiving module 1500 is further configured to receive an acknowledgment sending CTS message sent by the AP, where the CTS message includes channel resource information that is allocated for the STA, and the CTS message is sent by the AP according to the uplink data.
  • the channel resource information required by the STA generates a corresponding acknowledgment and transmission CTS message for the plurality of STAs to be sent with the uplink data, and determines, by using the subchannel information, that the plurality of STAs that have uplink data to be sent can receive the CTS message. And a plurality of different subchannels, and corresponding CTS messages transmitted in parallel on the plurality of different subchannels to a plurality of STAs having uplink data to be transmitted.
  • the second address field in the polling response message includes an association identifier of the STA, and channel resource information required by the STA;
  • the first address domain of the CTS message includes an association identifier of the STA And channel resource information allocated for the STA.
  • the sending module 1502 is further configured to: when the uplink data is sent on the channel resource, specifically include a physical frame. The content of the physical frame header of the length information is copied to the allocated plurality of subchannels for parallel transmission.
  • the access point AP indicates the sending time of the polling message through the beacon frame, and sends a polling message to the polled multiple STAs in parallel through at least two different subchannels, and sends the uplink data for the request.
  • the STA allocates a corresponding channel resource, and the different subchannels are divided by different orthogonal subcarriers, and receive uplink data that the STA uses the corresponding allocated channel resources to send in parallel; the AP can poll multiple STAs at a time.
  • multiple STAs can simultaneously transmit data in parallel using the channel, which solves the technical problem that the AP can only poll one STA at a time in the prior art, which makes the channel resource management or control mode inefficient, and greatly improves spectrum utilization. Efficiency and channel usage efficiency.
  • the present invention also provides related equipment for implementing the above solution.
  • the following is a detailed description of the structure of the access point device provided by the present invention, which is shown in FIG.
  • the access point device 170 includes a receiver 1700, a transmitter 1702, a memory 1704, and a processor 1706 (the number of processors 1706 in the network device may be one or more, and one processor in FIG. 17 is taken as an example).
  • the receiver 1700, the transmitter 1702, the memory 1704, and the processor 1706 may be connected by a bus or other means, wherein the bus connection is taken as an example in FIG.
  • the memory 1704 is configured to store program code
  • the processor 1706 is configured to invoke the program code stored in the memory 1704 to perform the following steps:
  • a broadcast frame is transmitted to the station STA by the transmitter 1702, the broadcast frame including time information for indicating the transmission of the polling message; at the time indicated by the time information, by the transmitter 1702, the plurality of different subchannels are respectively
  • the plurality of STAs that are polled send a polling message in parallel, and allocate corresponding channel resources to STAs that have uplink data to be sent among the plurality of polled STAs; the different subchannels pass different orthogonal subcarriers Performing division; receiving, by the receiver 1700, the uplink data that is sent by the STAs that have uplink data to be transmitted in parallel by using the corresponding allocated channel resources.
  • the processor 1706 sends the broadcast frame to the station STA through the transmitter 1702, it further performs: receiving, by the receiver 1700, an association request message sent by the STA, where the association request message includes indicating to the AP that the STA can Receive subchannel information of the message.
  • the processor 1706 sends a polling message to the plurality of polled STAs in parallel on the plurality of different subchannels by the transmitter 1702 at the time indicated by the time information, and sends the uplink data for the uplink data.
  • the STA allocates corresponding channel resources, including:
  • the processor 1706 determines, by the subchannel information, a subchannel that can receive a polling message for a plurality of STAs to which the uplink data is to be transmitted, respectively; and at the time indicated by the time information, the determined plurality of subchannels are respectively determined by the transmitter 1702. Transmitting a polling message to the plurality of STAs in parallel, the polling message including channel resource information corresponding to the plurality of STAs.
  • the processor 1706 transmits the uplink data by using the subchannel information. Before the STAs respectively determine the subchannels that can receive the polling message, they also perform:
  • the receiver 1700 receives the data frame sent by the STA, and learns whether the STA has uplink data to send.
  • the processor 1706 sends a polling message to the plurality of polled STAs in parallel on the plurality of different subchannels by the transmitter 1702 at the time indicated by the time information, and sends the uplink data for the uplink data.
  • the STA allocates corresponding channel resources, including:
  • the receiver 1700 receives the polling response message returned by the STA that has the uplink data to be sent in the polled STA, where the polling response message includes the uplink data to be sent Channel resource information required by the transmitted STA; generating, according to the required channel resource information, a corresponding acknowledgement sending CTS message for multiple STAs to be sent with uplink data, where the CTS message includes to send uplink data Multiple STAs corresponding to the allocated channel resource information; determining, by the subchannel information, a plurality of different subchannels capable of receiving the CTS message for a plurality of STAs having uplink data to be transmitted, and transmitting at the transmitter 1702
  • the corresponding CTS messages are
  • the first address field in the polling message includes an association identifier for indicating the STA being polled, and channel resource information allocated for the STA.
  • the second address field in the polling response message includes an association identifier for indicating a STA that sends a polling response message, and channel resource information required by the STA.
  • the first address field of the CTS message includes an association identifier for indicating a STA that receives the CTS message, and channel resource information allocated for the STA.
  • the processor 1700 After receiving, by the receiver 1700, the processor 1700 receives the uplink data that is sent by the STA in parallel using the corresponding allocated channel resources, the processor 1706 further performs:
  • the transmitter 1702 After delaying the short frame interval SIFS, the transmitter 1702 is used to separately send an acknowledgment message to the STAs on a plurality of different subchannels.
  • the access point device 170 of the embodiment of the present invention may be, for example, a network management device, a router, a transmitting node, an intelligent mobile terminal, or other network device.
  • the functions of the function modules in the access point device 170 can be specifically implemented according to the method in the foregoing method embodiment, that is, the method item embodiments in the foregoing FIG. 2 to FIG. 7 can be specifically referred to, and details are not described herein again. .
  • the present invention also provides related equipment for implementing the above solution.
  • the following is a detailed description of the structure of the site device provided by the present invention shown in FIG. 18:
  • the site device 180 includes a receiver 1800, a transmitter 1802, a memory 1804, and a processor 1806 (the number of processors 1806 in the network device may be one or more, and one processor is exemplified in FIG. 18).
  • the receiver 1800, the transmitter 1802, the memory 1804, and the processor 1806 may be connected by a bus or other means, wherein the bus connection is taken as an example in FIG.
  • the memory 1804 is configured to store program code
  • the processor 1806 is configured to invoke the program code stored in the memory 1804 to perform the following steps:
  • the processor 1806 receives, by the receiver 1800, a broadcast frame sent by the access point AP, where the broadcast frame includes time information for indicating to send a polling message, where the STA is uplinked by multiple STAs polled by the AP.
  • Receiving one of the STAs to be sent by the data receiving, by the receiver 1800, a channel resource that is sent by the AP and corresponding to the STA; the channel resource is after the broadcast frame is sent by the AP, and the time information is indicated by And transmitting a polling message to the plurality of polled STAs in parallel on a plurality of different subchannels, and correspondingly assigning channels to STAs that have uplink data to be sent among the plurality of polled STAs a resource; the different subchannels are divided by different orthogonal subcarriers; and the uplink data is sent by the transmitter 1802 on the channel resource in parallel with the STAs that have uplink data to be sent among other polled multiple STAs. .
  • the processor 1806 may further perform: sending, by the transmitter 1802, an association request message to the AP, where the association request message includes indicating to the AP
  • the STA is capable of receiving subchannel information of the message.
  • the processor 1806 receives, by the receiver 1800, the channel resources that are sent by the AP and are corresponding to the STA, including:
  • the STA corresponds to the allocated channel resource information; the polling message is that the AP determines, by using the subchannel information, a plurality of STAs that have uplink data to be sent, respectively, to determine a subchannel capable of receiving a polling message, and in the The time indicated by the time information, the polling message transmitted to the plurality of STAs in parallel on the determined plurality of subchannels.
  • the processor 1806 may further perform:
  • the processor 1806 sends a data frame to the AP by using the transmitter 1802, where the data frame includes information indicating whether the STA has uplink data to be sent; and when the data frame includes indicating that the STA has uplink data to send
  • the information of the polling message is specifically that the AP determines, by using the subchannel information, a subchannel that can receive a polling message for a plurality of STAs that have uplink data to be sent, and the time indicated by the time information. a polling message sent to the plurality of STAs in parallel on the determined plurality of subchannels.
  • the first address field in the polling message includes an association identifier of the STA, and channel resource information allocated to the STA.
  • the processor 1806 receives, by the receiver 1800, the channel resources that are sent by the AP and are corresponding to the STA, including:
  • the polling message is that the AP determines, by using the subchannel information, a subchannel that can receive a polling message, for each of the polled multiple STAs, Deriving the time information, and transmitting, in the determined plurality of subchannels, the polling message to the plurality of STAs that are polled, respectively;
  • a polling response message to the AP, where the polling response message includes channel resource information required by the STA;
  • an acknowledgement sending CTS message sent by the AP where the CTS message includes channel resource information allocated for the STA correspondingly; the CTS message is required by the AP according to the STA to be sent according to the uplink data.
  • Channel resource information which is used to generate a corresponding acknowledgment transmission CTS message for a plurality of STAs to be sent with uplink data, and determine, by using the subchannel information, a plurality of STAs that are to be sent with uplink data to receive the CTS message.
  • a corresponding CTS message transmitted in parallel on the plurality of different subchannels to a plurality of STAs having uplink data to be transmitted.
  • the second address field in the polling response message includes an association identifier of the STA, and channel resource information required by the STA.
  • the first address field of the CTS message includes an association identifier of the STA, and channel resource information allocated for the STA.
  • the processor 1806 specifically includes the physical frame when the uplink data is sent by the transmitter 1802 on the channel resource.
  • the content of the physical frame header of the length information is copied to the allocated plurality of subchannels for parallel transmission.
  • the site device 180 of the embodiment of the present invention may be, for example, a tablet computer, a personal digital assistant, a smart mobile terminal, or other network device.
  • the functions of the function modules in the site device 180 can be specifically implemented according to the method in the foregoing method embodiment, that is, the method embodiment of the foregoing FIG. 8 to FIG. 10 can be specifically referred to, and details are not described herein again.
  • the present invention also provides related systems for cooperating with the implementation of the above described solutions.
  • the following is a detailed description of the structure of the communication system provided by the present invention shown in FIG. 19:
  • the communication system 190 includes an access point device 1900 and a site device 1902, where
  • the access point device 1900 includes the communication device 110 in any of the foregoing embodiments of FIG. 11 to FIG. 14 , and details are not described herein;
  • the site device 1902 includes the uplink data transmitting device 150 in the foregoing embodiment of FIG. 15 to FIG. 16, and details are not described herein again.
  • the access point AP indicates the sending time of the polling message by using the broadcast frame, and sends the polling message to the polled multiple STAs in parallel through at least two different subchannels.
  • the STA that requests the uplink data is allocated a corresponding channel resource, and the different subchannels are divided by different orthogonal subcarriers, and the uplink data that the STA uses the corresponding allocated channel resources to be sent in parallel is received;
  • Multiple STAs, and multiple STAs can simultaneously transmit data in parallel using the channel, which solves the technical problem that the AP can only poll one STA at a time in the prior art, which makes the channel resource management or control mode inefficient, and greatly improves. Spectrum utilization efficiency and channel use efficiency.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

Abstract

La présente invention concerne un procédé d'envoi de données de liaison montante. Le procédé est caractérisé en ce qu'il comprend : l'envoi par un point d'accès (AP) d'une trame de diffusion à des stations (STA), la trame de diffusion comprenant des informations temporelles utilisées pour l'indication de l'envoi d'un message d'interrogation ; au moment indiqué par les informations temporelles, l'envoi en parallèle, dans différents sous-canaux multiples, du message d'interrogation à de multiples STA interrogées et l'affectation des ressources de canal correspondant aux STA qui possèdent des données de liaison montante à envoyer dans les multiples STA interrogées, les différents sous-canaux étant divisés au moyen de différentes sous-porteuses orthogonales ; et la réception des données de liaison montante envoyées en parallèle au moyen des ressources de canal affectée par les STA qui possèdent les données de liaison montante à envoyer. Par conséquent, la présente invention concerne également le procédé d'envoi de données de liaison montante, un appareil et un système associés. Au moyen de la présente invention, le problème technique dans l'état de la technique, que l'efficacité de la gestion ou de la manière de commande de ressource de canal est faible parce qu'un AP ne peut interroger uniquement qu'une STA à la fois, est résolu, ce qui permet d'améliorer considérablement l'efficacité d'utilisation du spectre et l'efficacité d'utilisation du canal.
PCT/CN2015/073666 2014-03-05 2015-03-04 Procédé d'envoi de données, appareil et système associés WO2015131832A1 (fr)

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