WO2016127371A1 - 一种信道竞争方法及相关装置 - Google Patents

一种信道竞争方法及相关装置 Download PDF

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Publication number
WO2016127371A1
WO2016127371A1 PCT/CN2015/072947 CN2015072947W WO2016127371A1 WO 2016127371 A1 WO2016127371 A1 WO 2016127371A1 CN 2015072947 W CN2015072947 W CN 2015072947W WO 2016127371 A1 WO2016127371 A1 WO 2016127371A1
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Prior art keywords
channel
bss
current channel
signal detection
current
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PCT/CN2015/072947
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English (en)
French (fr)
Inventor
罗俊
马驰翔
林英沛
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2015/072947 priority Critical patent/WO2016127371A1/zh
Priority to CN201580075906.2A priority patent/CN107210847B/zh
Publication of WO2016127371A1 publication Critical patent/WO2016127371A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a channel competition method and related apparatus.
  • the 802.11ac-based wireless local area network (WLAN) system is referred to as the 802.11ac system, and the 802.11ac system uses the Orthogonal Frequency Division Multiplexing (OFDM) modulation.
  • a plurality of basic service sets (BSSs) may be included, and each BSS may include an access point (AP) and a station (Station, STA) associated with the AP.
  • AP access point
  • STA station
  • the AP or the STA needs to perform data transmission, it can detect the signal detection energy of the current channel. If the signal detection energy is smaller than the Clear Channel Assessment (CCA) threshold, the channel competition is performed, and when the channel competition is successful, the channel competition is performed. Data transmission; wherein the smaller the signal detection energy, the more idle the current channel is.
  • CCA Clear Channel Assessment
  • each BSS may include an AP and multiple STAs associated with the AP. After the AP performs time-frequency resource scheduling on the STA, the STA can perform uplink data transmission.
  • OFDMA Orthogonal Frequency Division Multiple Access
  • the AP needs to successfully compete for the channel to perform time-frequency resource scheduling on the STA. If the AP contends for the channel, the STA cannot perform time-frequency resource scheduling on the STA, thereby affecting the uplink data transmission of the STA.
  • the embodiment of the invention provides a channel competition method and related device, which can improve the channel of the AP The probability of success in competition.
  • the first aspect provides a channel competition method, including:
  • the access point determines whether the channel contention packet sent by any station of the basic service set BSS is parsed on the current channel; if yes, the access point determines that the BSS competes for the current channel successfully;
  • a downlink physical layer protocol data unit PPDU or a trigger frame transmitting, by the current channel that the competition is successful, a downlink physical layer protocol data unit PPDU or a trigger frame to the local BSS, where the downlink PPDU or the trigger frame includes uplink or downlink scheduling information for multiple sites of the local BSS.
  • the downlink PPDU is broadcast to the local BSS or Before triggering the frame, it also includes:
  • the method further includes:
  • the channel contention packet includes a channel state of the current channel that is successfully contiguously detected by the corresponding station. information
  • the channel contention packet is sent when the station needs to perform data transmission, and detects that the signal detection energy of the current channel is less than a first preset threshold;
  • the method Before the broadcast of the downlink PPDU or the trigger frame to the local BSS by using the current channel with the contention success, the method further includes:
  • Detecting the signal detection energy of the current channel that is successfully contending determining whether the detected signal detection energy of the currently successful channel is less than a second preset threshold; the second preset threshold is different from the first pre-predetermined Set a threshold;
  • the step of broadcasting the downlink PPDU or the trigger frame to the BSS by using the current channel with the contention success is performed.
  • the detecting, by the detecting, the signal detection energy of the current channel that is successfully contending comprises:
  • determining when the signal detection energy of each subband of the current channel that successfully competes is detected, the determining is detected. Whether the signal detection energy of the currently successful channel of the competition is less than a second preset threshold includes:
  • the second aspect provides another channel competition method, including:
  • the channel is advertised on the current channel to make the packet
  • the AP of the BSS determines when the current channel resolves the channel contention packet.
  • the BSS competes for the current channel success;
  • the channel contention packet includes channel state information of the current channel, so that the AP of the BSS determines the to-be-scheduled according to the channel state information. Target site.
  • the method before the current channel sends a channel contention packet, the method includes:
  • the method further includes:
  • Detecting a second signal detection energy of the current channel that is successfully contending determining whether the second signal detection energy is less than a second preset threshold; the second preset threshold is different from the first preset threshold;
  • the detecting, by the detecting, the second signal detection energy of the current channel that is successfully contending comprises:
  • the second signal detection energy of the subband indicated by the scheduling information of the local station included in the current channel Detecting, in the PPDU or the trigger frame, the second signal detection energy of the subband indicated by the scheduling information of the local station included in the current channel.
  • the third aspect provides another channel competition method, including:
  • the access point needs to perform data transmission, and does not resolve the channel contention packet sent by any station of the basic service set BSS in the current channel, the channel is contending for the channel competition on the current channel to perform channel competition;
  • the downlink physical layer protocol data unit PPDU or the trigger is broadcast to the local BSS by using the current channel with successful contention.
  • a frame, the downlink PPDU or a trigger frame includes scheduling information for a plurality of sites of the BSS.
  • the sending the downlink PPDU or the trigger frame according to the receiving condition of the response frame sent by the any station of the current BSS includes:
  • the downlink PPDU or the trigger frame is broadcast to the BSS by using the current channel that the competition succeeds.
  • the sending the downlink PPDU or the trigger frame according to the receiving condition of the response frame sent by any one of the sites of the current BSS includes:
  • the response frame includes channel state information of the current channel that is successfully contending for the corresponding station and the The identity of the site;
  • the method includes: detecting a first signal detection energy of the current channel; determining whether the first signal detection energy is less than a first preset threshold; if yes, performing the current channel transmission The steps of the channel competition package;
  • the response frame is a channel contention packet sent by the AP of the current BSS when the current channel resolves the AP of the current BSS, and when the signal detection energy of the current channel is detected to be less than the first preset threshold, The current channel is sent to the AP of the BSS;
  • the method Before the broadcast of the downlink PPDU or the trigger frame to the local BSS by using the current channel with the contention success, the method further includes:
  • Detecting a second signal detection energy of the current channel determining whether the second signal detection energy is less than a second preset threshold; the second preset threshold is different from the first preset threshold;
  • the fourth aspect provides another channel competition method, including:
  • the fourth aspect after the determining that the current BSS is contending for the current channel, and the current channel that is successfully contending to the local BSS Before the AP sends a response frame, it also includes:
  • the AP after the determining that the current BSS is contending for the current channel, and the current channel that is successfully contending to the local BSS Before the AP sends a response frame, it also includes:
  • a response frame including:
  • the detecting, by the detecting, the second signal detection energy of the current channel that is successfully contending includes:
  • the fifth aspect provides a communication device, where the communication device is an access point AP or a processor applied to the access point AP, including:
  • a channel competition module configured to determine whether a channel contention packet sent by any station of the basic service set BSS is parsed on the current channel; if yes, determining that the BSS competes for the current channel successfully;
  • a data transmission module configured to broadcast, by using the current channel that is successfully contending, a downlink physical layer protocol data unit PPDU or a trigger frame to the local BSS, where the downlink PPDU or the trigger frame includes multiple sites for the local BSS Upstream or downstream scheduling information.
  • the channel contention module is further configured to: after determining that the current BSS competes for the current channel, the solution is recorded in a preset time period. And extracting identifiers of the plurality of sites of the BSS of the current channel transmission channel contention packet that are successful in the competition;
  • the data transmission module is further configured to determine scheduling information of the multiple sites corresponding to the identifiers of the multiple sites; generate a downlink PPDU or a trigger frame, where the downlink PPDU or the trigger frame includes scheduling information of the multiple sites; And transmitting, by the current channel that the competition is successful, a downlink PPDU or a trigger frame including scheduling information of the multiple sites to the local BSS.
  • the channel contention module is further configured to determine that the current BSS competes with the current channel successfully. And locating a channel contention packet sent by the site of the BSS that is parsed in the preset time period on the current channel that is successfully contending; the channel contention packet includes a channel of the current channel that is successfully contiguously detected by the corresponding station. status information;
  • the data transmission module is further configured to determine, according to the channel state information included in the parsed channel contention packet, a plurality of stations to be scheduled; and generate a downlink PPDU or a trigger frame that includes scheduling information of the multiple stations to be scheduled; Broadcasting a downlink PPDU or a trigger frame including scheduling information of the plurality of stations to be scheduled to the local BSS by using the current channel with successful competition.
  • the channel competition packet is The station sends when the data transmission needs to be performed, and the signal detection energy of the current channel is detected to be less than the first preset threshold;
  • the communication device further includes:
  • a signal detecting module configured to detect signal detection energy of the current channel that is successfully competitive
  • the data transmission module is further configured to: when the signal detection module detects the second preset threshold of the signal detection energy of the currently successful channel, use the current channel that is successfully contending to broadcast a downlink PPDU to the BSS. Or triggering a frame; the second preset threshold is different from the first preset threshold.
  • the data transmission module is specifically configured to: when the signal detection energy of any subband of the current channel that is successfully contending is less than a second preset threshold, determine that the detected signal detection energy of the current channel is less than a second preset. a threshold, otherwise, determining that the detected signal detection energy of the current channel is greater than or equal to At the second preset threshold.
  • the sixth aspect provides another communication device, which is a site or a processor applied to the site, and includes:
  • a channel competition module configured to: when the station needs to perform data transmission, and does not parse out a channel contention packet sent by an access point AP of the basic service set BSS, the channel is contending on the current channel to When the AP of the current BSS parses the channel contention packet by the current channel, determining that the BSS competes for the current channel successfully;
  • a data transmission module configured to receive a downlink physical layer protocol data unit PPDU or a trigger frame sent by the AP of the local BSS on the current channel that is successfully contending; and include scheduling for the local station in the downlink PPDU or the trigger frame
  • the uplink or downlink data transmission is performed according to the scheduling information for the local station included in the downlink PPDU or the trigger frame.
  • the channel contention packet includes channel state information of the current channel, so that the AP of the BSS determines the to-be-scheduled according to the channel state information. Target site.
  • the communications device further includes:
  • a signal detection module configured to detect a first signal detection energy of the current channel
  • the channel competition module is configured to: when the first signal detection energy detected by the signal detection module is less than a first preset threshold, send a channel competition packet on the current channel;
  • the signal detection module is further configured to: if the downlink PPDU or the trigger frame includes scheduling information for the local station, detect the second signal detection energy of the current channel that is successfully contending;
  • the data transmission module is specifically configured to: when the second signal detection energy detected by the signal detection module is less than a second preset threshold, perform, according to the scheduling information for the local station included in the downlink PPDU or the trigger frame Uplink or downlink data transmission; the second preset threshold is different from the first preset threshold.
  • the seventh aspect provides another communication device, where the communication device is an access point AP or a processor applied to the access point AP, including:
  • a channel competition module configured to: when the AP needs to perform data transmission, and does not parse out a channel contention packet sent by any station of the basic service set BSS, the channel is contending on the current channel to perform Channel competition
  • a data transmission module configured to broadcast a downlink physical layer to the local BSS by using the current channel that is successfully contending according to the receiving situation of the response frame sent by any station of the current BSS after determining that the current channel is successfully contending
  • the protocol data unit PPDU or the trigger frame includes scheduling information for multiple sites of the BSS in the downlink PPDU or the trigger frame.
  • the data transmission module is specifically configured to receive a response sent by any station of the local BSS when the contention is successful on a current channel.
  • the downlink PPDU or the trigger frame is broadcast to the BSS by using the current channel that the competition succeeds.
  • the data transmission module is specifically configured to: when receiving the response frame sent by the site of the local BSS on the current channel that is successfully contending And the response frame includes the channel state information of the currently successful channel that is detected by the corresponding station and the identifier of the station, and determines the to-be-scheduled according to the channel state information included in the response frame and the identifier of the site. Generating a downlink PPDU or a triggering frame including scheduling information of the plurality of stations to be scheduled; and broadcasting, by using the current channel that the contention is successful, the scheduling information including the plurality of stations to be scheduled to the local BSS Downstream PPDU or trigger frame.
  • the communications apparatus further includes :
  • a signal detection module configured to detect a first signal detection energy of the current channel
  • the channel competition module is configured to: when the first signal detection energy detected by the signal detection module is less than a first preset threshold, send a channel competition packet on the current channel;
  • the response frame is a channel contention packet sent by the AP of the current BSS when the current channel resolves the AP of the current BSS, and when the signal detection energy of the current channel is detected to be less than the first preset threshold, The current channel is sent to the AP of the BSS;
  • the signal detecting module is further configured to detect a second signal detecting energy of the channel
  • the data transmission module is configured to: when the second signal detection energy detected by the signal detection module is less than a second preset threshold, broadcast a downlink PPDU or a trigger frame to the local BSS by using the current channel that is successfully contending
  • the second preset threshold is different from the first preset threshold.
  • the eighth aspect provides another communication device, which is a site or a processor applied to the site, and includes:
  • a channel competition module configured to determine whether the channel competing packet sent by the access point AP of the BSS is parsed in the current channel; if yes, determining that the current BSS is contending for the current channel;
  • a data transmission module configured to send a response frame to the AP of the local BSS on the current channel that is successfully contending, so that the AP of the local BSS uses the current channel that successfully competes when receiving the response frame. Broadcasting a downlink PPDU or a trigger frame to the local BSS; receiving a downlink physical layer protocol data unit PPDU sent by the AP of the local BSS on the current channel with successful contention; and including a downlink PPDU or a trigger frame for the local station When the information is scheduled, the uplink or downlink data transmission is performed according to the scheduling information for the local station included in the downlink PPDU or the trigger frame.
  • the communications device further includes:
  • a signal detection module configured to detect a first signal detection energy of the current channel
  • the data transmission module is configured to: when the first signal detection energy detected by the signal detection module is less than the first preset threshold, send a response frame to the AP of the local BSS on the current channel that is successfully contending; Or, when the signal detecting module detects that the first signal detection energy is less than the first signal detection energy, randomly selecting one subchannel from the currently successful contention channel, and using the subchannel to the local BSS Sending, by the AP, the response frame, where the response frame includes channel state information of the current channel that is successfully competed by the local station, and an identifier of the local station, so that the AP of the local BSS is received according to the The channel state information included in the response frame, and the identity of the site determine the site to be scheduled.
  • the signal detecting module is further configured to include, in the downlink PPDU or the trigger frame, After the scheduling information, detecting the second signal detection energy of the current channel that is competitively successful;
  • the data transmission module is further configured to: when the second signal detection energy detected by the signal detection module is less than a second preset threshold, perform uplink or downlink data transmission according to the scheduling information included in the downlink PPDU or the trigger frame.
  • the second preset threshold is different from the first preset threshold.
  • the embodiment of the invention has the following beneficial effects:
  • the AP determines that when the current channel resolves the channel contention packet sent by any station of the BSS, the AP may determine that the current BSS is contending for the current channel, or the AP needs to perform data transmission, and the AP is not currently in the current state.
  • the channel competition packet may be sent on the current channel for channel contention, because the AP or any site in the BSS
  • the AP of the BSS can determine that the BSS is contending for the current channel, and can schedule the station of the BSS by using the current channel with successful competition. Therefore, the channel competition success probability of the AP can be improved.
  • FIG. 1 is a schematic structural diagram of a system for channel contention according to an embodiment of the present invention
  • FIG. 2 is a schematic flowchart of a channel competition method according to an embodiment of the present invention.
  • FIG. 3 is a schematic flowchart of another channel competition method according to an embodiment of the present invention.
  • FIG. 4 is a schematic flowchart of another channel competition method according to an embodiment of the present invention.
  • FIG. 5 is a schematic flowchart of a channel competition method according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic flowchart of a channel competition method according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic flowchart of a channel competition method according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic flowchart of another channel competition method according to an embodiment of the present invention.
  • FIG. 9 is a schematic flowchart of another channel competition method according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of a communication apparatus according to an embodiment of the present invention.
  • FIG. 11 is a schematic structural diagram of an AP according to an embodiment of the present disclosure.
  • FIG. 12 is a schematic structural diagram of a communication apparatus according to an embodiment of the present invention.
  • FIG. 13 is a schematic structural diagram of a station according to an embodiment of the present disclosure.
  • FIG. 14 is a schematic structural diagram of a communication apparatus according to an embodiment of the present invention.
  • FIG. 15 is a schematic structural diagram of an AP according to an embodiment of the present disclosure.
  • FIG. 16 is a schematic structural diagram of a communication apparatus according to an embodiment of the present invention.
  • FIG. 17 is a schematic structural diagram of a station according to an embodiment of the present invention.
  • FIG. 1 is a schematic structural diagram of a system for channel contention according to an embodiment of the present invention.
  • the technical solution provided by the embodiment of the present invention may be applicable to a system including multiple BSSs, each of which may include one AP and multiple sites (STAs) associated with the AP, such as an 802.11ax system.
  • the site can perform uplink data transmission.
  • the system architecture shown in FIG. 1 shows the system architecture shown in FIG.
  • an embodiment of the present invention provides a channel contention method.
  • a flowchart of a channel competition method according to an embodiment of the present invention may include the following steps:
  • step 201 to step 203 is an AP in the above system architecture or a processor in the AP, such as a CPU (English name: Center Process Unit).
  • a processor in the AP such as a CPU (English name: Center Process Unit).
  • the following is an example in which the execution subject of the step 201 to the step 203 is an AP in the above system architecture.
  • Step 201 Determine whether the channel competition packet sent by any station of the BSS is parsed in the current channel. If yes, go to step 202; otherwise, end the current process.
  • Step 202 Determine that the BSS competes for the current channel successfully.
  • each BSS includes multiple sites associated with the APs of the BSS, and after the AP performs time-frequency resource scheduling on the site, the site can perform uplink data transmission.
  • the AP needs to successfully contend to the channel to schedule time-frequency resources for the station. If the AP contends for the channel, the AP cannot schedule time-frequency resources for the station, thus affecting the uplink data transmission of the station. Therefore, in order to improve data transmission in the 802.11ax system. Efficiency, need to improve the success rate of AP preemption channel.
  • the station contending channel in the BSS when the station contending channel in the BSS is successful, the channel usage right is transferred to the AP, that is, in the same BSS, the station can help the AP to preempt the channel, so as to improve the success rate of the AP preempting the channel. .
  • any station in the BSS when any station in the BSS needs to perform data transmission, it may determine whether to participate in channel competition by detecting the signal detection energy of the current channel, and when the detected signal detection energy is lower than a preset threshold (first When a preset threshold is used, the station can transmit a channel contention packet for channel contention.
  • the AP resolves the channel contention packet sent by the site of the BSS on the current channel, it determines that the current channel is successfully contending.
  • the channel contention packet can be an RTS, RTX or a newly defined control frame or management frame.
  • the AP when the AP does not resolve the channel contention packet sent by the site of the BSS in the current channel, the AP may determine whether to participate in channel competition by using the channel idle assessment, that is, detecting the signal detection energy of the current channel. And determining whether to send the channel contention packet to participate in channel competition according to whether the signal is detected to be less than a preset threshold, which is not limited by the embodiment of the present invention.
  • Step 203 Broadcast a downlink PPDU or a trigger frame to the BSS by using the current channel that is successfully contending, and the downlink PPDU includes uplink or downlink scheduling information for multiple sites of the BSS.
  • the AP may determine, by using a preset scheduling policy, the station to be scheduled (the site of the BSS), and the current channel that is successfully contending to the BSS.
  • the station sends a downlink PPDU (Physical Protocol Data Unit) or a Trigger frame, and the downlink PPDU or the trigger frame may include uplink or downlink scheduling information for the station that needs to be scheduled.
  • the site of the BSS parses the downlink PPDU or the triggering frame, obtains the scheduling information included therein, and performs uplink and/or downlink data transmission according to the corresponding scheduling information.
  • the trigger frame may be a newly defined control frame or a management frame.
  • the AP may carry uplink or downlink scheduling information for the station to be scheduled in the SIG domain of the downlink PPDU, and the scheduling information may indicate that the AP allocates time-frequency resources for the corresponding station, so that the corresponding station may be based on the time-frequency.
  • the resource determines the time and frequency domain of receiving the downlink data sent by the AP, or the time and frequency domain of the uplink data transmission.
  • different CCA thresholds are set for the channel competition phase and the data transmission phase: in the channel competition phase, whether the detected signal is detected by the detected signal is less than the first preset threshold. Determining whether to perform channel competition; in the data transmission phase, determining whether to perform data transmission by determining whether the detected signal detection energy is less than a second preset threshold.
  • the first preset threshold and the second preset threshold may be set according to a specific scenario, for example, the first preset threshold is -82dbm, and the second preset threshold is -62dbm; preferably, the first preset threshold is greater than the second Preset threshold.
  • the AP may first detect the signal detection energy of the current channel that is successfully contending, and determine the detected signal of the current channel that is successfully contending.
  • the detection energy is less than a second preset threshold to determine whether to perform data transmission.
  • the AP may send a downlink PPDU or a trigger frame to the site of the BSS on the current channel.
  • the AP when the AP detects the signal detection energy of the current channel, the AP can detect the signal detection energy of the entire bandwidth of the current channel, and can also detect the signal detection energy of each sub-band of the current channel.
  • the AP When the signal detection energy of the current channel is detected to detect the signal detection energy of each sub-band, if the signal detection energy of any sub-band is less than the second preset threshold, the AP performs the step of transmitting the downlink PPDU to the site of the BSS. .
  • the corresponding second preset threshold may be different.
  • the threshold of the channel idle evaluation (the second preset threshold) on the entire bandwidth is CCAdata
  • the threshold of the channel idle evaluation on each subband is used. Can be 1/8*CCAdata.
  • the first preset threshold of the channel competition phase and the second preset threshold set by the data transmission phase may be different. Generally, the first preset threshold is smaller than the second preset threshold.
  • the AP/STA or the station can determine whether to contend for the channel by judging the relationship between the channel detection energy and the threshold CCAcc in the contention phase; in the data phase, the AP/or the STA determines the signal detection energy.
  • the relationship with the threshold CCAdata determines whether to perform OFDMA data transmission. In this way, maintaining the original CCA threshold during the competition phase can ensure the fairness of the access channel, and in the data phase, the AP/site STA can improve the ability to transmit data concurrently by increasing the CCA threshold.
  • an embodiment of the present invention provides another method for channel contention.
  • a flowchart of another channel contention method according to an embodiment of the present invention may include the following steps:
  • step 301 to step 306 is an AP in the above system architecture or a processor in the AP, such as a CPU.
  • the executor of steps 301 to 306 is an AP in the above system architecture.
  • Step 301 Determine whether the channel contention packet sent by any station of the BSS is parsed in the current channel. If yes, go to step S302; otherwise, end the current flow.
  • Step 302 Determine that the BSS competes for the current channel successfully.
  • Step 303 Record the identifiers of the multiple sites of the BSS of the current channel transmission channel contention packet that are successfully competed in the preset time period.
  • a time period may be set in advance (the time period may be set according to a specific scenario, which is described as T).
  • the AP and its associated site may be configured.
  • Perform idle channel estimation that is, detect the signal detection energy of the current channel Whether the quantity is less than the preset threshold, and when detecting that the signal detection energy of the current channel is less than the preset threshold (the first preset threshold), the channel competition packet is sent to perform channel competition.
  • the AP receives the channel contention packet sent by the site of the BSS, the AP determines that the BSS is contending for the current channel, and the AP can collect the current channel of the BSS that is resolved in the preset time period T.
  • the transmitted channel contends the packet, and records the identifiers of the plurality of sites of the BSS that resolve the current channel transmission channel contention packet in the contention succession within the preset time period T.
  • Step 304 Determine scheduling information of multiple sites corresponding to the identifiers of the multiple sites.
  • Step 305 Generate a downlink PPDU or a trigger frame, where the downlink PPDU or the trigger frame includes scheduling information of the multiple sites.
  • the plurality of stations corresponding to the identifiers of the multiple sites of the BSS of the current channel transmitting channel contention packet that are successfully resolved in the preset time period T may be determined to be scheduled to be scheduled. Sites.
  • the AP records may be parsed according to the preset time period.
  • the identifiers of the plurality of stations of the BSS that transmit the channel contention packet on the current channel determine scheduling information of the plurality of stations, and generate a downlink PPDU or a trigger frame including the scheduling information of the plurality of stations.
  • the AP may add scheduling information of the multiple sites to the SIG domain of the downlink PPDU.
  • Step 306 Broadcast a downlink PPDU or a trigger frame including scheduling information of the multiple sites to the BSS by using the current channel with successful competition.
  • the current channel may be used to broadcast scheduling information (uplink or downlink scheduling information) including the multiple sites to the BSS.
  • the downstream PPDU or trigger frame After receiving the downlink PPDU or the triggering frame sent by the AP, the site of the BSS parses the downlink PPDU, obtains the scheduling information included therein, and performs uplink and/or downlink data transmission according to the corresponding scheduling information.
  • the foregoing steps 305 and 306 may further include the foregoing steps 11) to 13), and the specific implementation may refer to the related description in the method flow described in FIG. 2, The embodiments of the present invention are not described herein again.
  • an embodiment of the present invention provides another channel contention method.
  • the flowchart of another channel competition method according to an embodiment of the present invention may include the following steps:
  • step 401 to step 406 is an AP in the above system architecture or a processor in the AP, such as a CPU.
  • the executor of steps 401 to 406 is an AP in the above system architecture.
  • Step 401 Determine whether the channel contention packet sent by any station of the BSS is parsed in the current channel. If yes, go to step S402; otherwise, end the current flow.
  • Step 402 Determine that the BSS competes for the current channel successfully.
  • Step 403 Count a channel contention packet sent by the site of the BSS that is parsed in the preset time period on the current channel that is successfully contending, and the channel contention packet includes a channel of the current channel that is successfully tracked by the corresponding station. status information.
  • a time period may be set in advance (the time period may be set according to a specific scenario, which is described as T).
  • the AP and its associated site may be configured.
  • Performing an idle channel evaluation that is, detecting whether the signal detection energy of the current channel is less than a preset threshold, and when detecting that the signal detection energy of the current channel is less than a preset threshold (first preset threshold), transmitting a channel contention packet to perform channel Competition; wherein the channel contention packet may further include channel state information of the current channel detected by the station, such as historical SNR (SIGNAL-NOISE RATIO), instantaneous interference strength, and the like.
  • the AP When the AP receives the channel contention packet sent by the site of the BSS, the AP determines that the BSS is contending for the current channel, and the AP may collect the channel contention packet sent by the site of the BSS that is parsed in the preset time period T.
  • Step 404 Determine, according to channel state information included in the parsed channel contention packet, a plurality of stations to be scheduled.
  • Step 405 Generate a downlink PPDU or a trigger frame, where the downlink PPDU or the trigger frame includes scheduling information of the multiple stations to be scheduled.
  • the AP may perform the BSS parsed according to the preset time period T.
  • the station determines the plurality of stations to be scheduled in the channel state information included in the channel contention packet transmitted by the currently successful channel.
  • the AP may be based on the channel competing packet sent by the station of the BSS that is parsed within the preset time period T on the current channel that the competition succeeds.
  • the channel status information is used to determine the site of the BSS corresponding to the channel contention packet whose historical SNR is greater than the preset threshold as the station to be scheduled.
  • the AP may perform a channel contention packet that occurs on the current channel that the competition succeeds according to the site of the BSS that is parsed within the preset time period T.
  • the station of the BSS corresponding to the channel contention packet whose instantaneous interference intensity is less than the preset threshold is determined as the scheduled station.
  • the AP may generate a downlink PPDU or a trigger frame including the scheduling information of the multiple stations to be scheduled. For example, the AP may add scheduling information of multiple sites to be scheduled to the SIG domain of the downlink PPDU.
  • Step 406 Broadcast a downlink PPDU or a trigger frame including scheduling information of the multiple stations to be scheduled to the current BSS by using the current channel that is successfully contending.
  • the AP after the AP generates the downlink PPDU or the trigger frame to which the scheduling information of the multiple stations to be scheduled is added, the current channel that is successfully used for the competition may broadcast to the BSS, including the multiple sites to be scheduled.
  • the downstream PPDU or trigger frame of the scheduling information After receiving the downlink PPDU or the triggering frame sent by the AP, the site of the BSS parses the downlink PPDU or the triggering frame, obtains the scheduling information included therein, and performs uplink and/or downlink data transmission according to the corresponding scheduling information.
  • the foregoing steps 405 and 406 may further include the foregoing steps 11) to 13), and the specific implementation may refer to the related description in the method flow described in FIG. 2, The embodiments of the present invention are not described herein again.
  • the channel usage right is transferred to the AP in the BSS, thereby improving the probability of the AP competing for the channel success. Furthermore, the data transmission performance of the system is improved.
  • the AP can parse the BSS according to the preset time period. The channel contention packet sent by the station, or the channel state information included in the channel contention packet, determines the station to be scheduled, and schedules the current channel idle state better or the channel state is better, further improving the system data transmission. performance.
  • an embodiment of the present invention provides a channel contention method.
  • a flowchart of a channel competition method according to an embodiment of the present invention may include the following steps:
  • the execution body of steps 501 to 504 is a processor in a site or a site in the above system architecture, such as a CPU.
  • the following is an example in which the execution body of steps 501 to 504 is a site in the above system architecture.
  • Step 501 When any station in the BSS needs to perform data transmission, and does not resolve the channel contention packet sent by the AP of the BSS on the current channel, the channel is contending for the packet on the current channel, so that the AP of the BSS is in the When the current channel resolves the channel contention packet, the BSS is determined to compete.
  • each BSS may include multiple sites associated with the APs of the BSS, and after the AP performs time-frequency resource scheduling on the site, the site can perform uplink data transmission, and the AP needs to If the channel is successfully contending for the time-frequency resource scheduling, if the AP contends for the channel, the time-frequency resource scheduling of the station cannot be performed, which affects the uplink data transmission of the station. Therefore, in order to improve the data transmission efficiency in the system, it is necessary to improve. The success rate of the AP preempting the channel.
  • the station contending channel in the BSS when the station contending channel in the BSS is successful, the channel usage right is transferred to the AP, that is, in the same BSS, the station can help the AP to preempt the channel, so as to improve the success rate of the AP preempting the channel. .
  • the channel contention packet when a station in the BSS needs to perform data transmission, and the channel contention packet sent by the AP of the BSS is not parsed on the current channel, the channel contention packet may be sent to perform channel competition.
  • the station may determine that the AP contending channel of the BSS is successful, and the site no longer performs the current Channel competition for the channel.
  • the station competes in the transmission channel.
  • the station may detect the signal detection energy of the current channel (the first signal detection energy), and may determine whether the energy of the first signal is less than a preset threshold (the first preset threshold may be set according to a specific scenario). The way to determine whether to participate in channel competition.
  • the station may determine to participate in channel competition and transmit a channel contention packet on the current channel.
  • the AP parses the channel contention packet sent by the site of the BSS in the current channel, the AP may determine that the current channel is successful.
  • the station when the station detects the first signal detection energy of the current channel, and determines that the first signal detection energy is equal to or greater than the first preset threshold, the station may not participate in the current channel.
  • Channel competition is not limited in this embodiment of the present invention.
  • Step 502 Receive a downlink PPDU or a trigger frame sent by the AP of the BSS on the current channel that is successfully contending.
  • Step 503 Determine whether the scheduling information for the local station is included in the downlink PPDU or the trigger frame. If the determination is yes, go to step 504; otherwise, end the current flow.
  • Step 504 Perform uplink or downlink data transmission according to scheduling information for the local station included in the downlink PPDU or the trigger frame.
  • the AP determines that the current channel is successfully contending, and the AP may determine the station to be scheduled according to the scheduling policy, and use the current channel to the current channel.
  • the BSS broadcasts a downlink PPDU or a trigger frame including scheduling information of the station to be scheduled.
  • the AP may include scheduling information of the station to be scheduled in the SIG domain in the downlink PPDU, where the scheduling information may indicate that the AP allocates time-frequency resources to the corresponding station, so that the corresponding station may determine to receive according to the time-frequency resource.
  • the time and frequency domain of the downlink data sent by the AP or the time and frequency domain of the uplink data transmission.
  • the site may parse the downlink PPDU or the triggering frame, and determine whether the downlink PPDU or the triggering frame includes scheduling information for the local station, that is, for the site.
  • the scheduling information if the downlink PPDU or the trigger frame includes scheduling information for the local station, the station may perform uplink and/or downlink data transmission according to the scheduling information of the downlink PPDU or the triggering frame for the local station. .
  • the AP may record the pre- Determining, in a time period, an identifier of a plurality of sites of the BSS of the current channel transmission channel contention packet that is successfully contending, and determining scheduling information of the multiple sites corresponding to the identifiers of the multiple sites, and further generating the information including the multiple a downlink PPDU or a trigger frame of the scheduling information of the station, and using the current channel to broadcast a downlink PPDU or a trigger frame including the scheduling information of the multiple sites to the BSS, so that the site of the BSS receives the downlink PPDU or the trigger frame.
  • the uplink or downlink data transmission is performed according to the scheduling information for the local end included in the downlink PPDU or the triggering frame.
  • the scheduling information for the local end included in the downlink PPDU or the triggering frame For the specific implementation, refer to the related description in steps 303 to 306 in the method flow described in FIG. The embodiments of the invention are not described herein again.
  • the station when the station detects the first signal detection energy of the current channel, and determines that the first signal detection energy is less than the first preset threshold, the station may send The channel contention packet includes channel state information of the current channel, such as historical SNR, instantaneous interference strength, and the like, so that the AP of the BSS determines the station to be scheduled according to the channel state information.
  • channel state information of the current channel such as historical SNR, instantaneous interference strength, and the like
  • the AP may collect the current BSS site parsed within the preset time period at the current successful competition.
  • the channel that is transmitted by the channel contends the packet, and determines the station to be scheduled according to the channel state information included in the channel contention packet, and further generates a downlink PPDU or a trigger frame including the scheduling information of the station to be scheduled, and successfully uses the competition.
  • the current channel broadcasts the downlink PPDU or the triggering frame of the scheduling information of the multiple stations to be scheduled to the BSS.
  • the downlink PPDU or the trigger frame includes the scheduling information for the local end, before the uplink or downlink data transmission is performed according to the scheduling information for the local end included in the downlink PPDU or the trigger frame, It can also include the following steps:
  • the method is smaller than, perform the step of performing uplink or downlink data transmission according to the scheduling information for the local station included in the downlink PPDU or the trigger frame.
  • different CCA thresholds are set for the channel competition phase and the data transmission phase: in the channel competition phase, Determine whether to perform channel competition by determining whether the detected signal detection energy is less than a first preset threshold; and determining whether to perform data transmission by determining whether the detected signal detection energy is less than a second preset threshold in the data transmission phase.
  • the first preset threshold and the second preset threshold may be set according to a specific scenario, for example, the first preset threshold is -82dbm, and the second preset threshold is -62dbm; preferably, the second preset threshold is greater than the first Preset threshold.
  • the station may first detect the signal detection energy of the currently successful channel, and determine Whether the detected signal detection energy of the currently successful channel is less than a second preset threshold to determine whether to perform data transmission.
  • the station may perform uplink or downlink data transmission according to the scheduling information for the local station included in the downlink PPDU or the trigger frame.
  • the AP when the AP detects the signal detection energy of the current channel that is successfully contending, the AP may detect the signal detection energy of the entire bandwidth of the current channel that is successfully contending, and may also detect the current channel that is successfully contending.
  • the signal detection energy of the current channel for detecting the successful competition is the signal detection energy for detecting the entire bandwidth
  • the signal detection energy of the current channel for detecting the competition is the downlink PPDU in the current channel for detecting the contention success.
  • the corresponding second preset threshold may be different.
  • the threshold of the channel idle evaluation (the second preset threshold) on the entire bandwidth is CCAdata
  • the threshold of the channel idle evaluation on each subband is used. Can be 1/8*CCAdata.
  • FIG. 6 a flowchart of a channel competition method according to an embodiment of the present invention is shown. The figure can include the following steps:
  • the execution body of steps 601 to 602 is an AP in the above system architecture or a processor in the AP, such as a CPU.
  • the following is an example in which the execution body of the step 601 to the step 602 is an AP in the above system architecture.
  • Step 601 When the AP needs to perform data transmission, and does not resolve the channel contention packet sent by the station of the BSS in the current channel, the channel is contending for the channel competition on the current channel to perform channel competition.
  • each BSS may include multiple sites associated with the APs of the BSS, and after the AP performs time-frequency resource scheduling on the site, the site can perform uplink data transmission, and the AP needs to If the channel is successfully contending for the time-frequency resource scheduling, if the AP contends for the channel, the time-frequency resource scheduling of the station cannot be performed, which affects the uplink data transmission of the station. Therefore, in order to improve the data transmission efficiency in the system, it is necessary to improve. The success rate of the AP preempting the channel.
  • the station contending channel in the BSS when the station contending channel in the BSS is successful, the channel usage right is transferred to the AP, that is, in the same BSS, the station can help the AP to preempt the channel, so as to improve the success rate of the AP preempting the channel. .
  • the AP when an AP in the BSS needs to perform data transmission, and the channel competition packet sent by the site of the BSS is not parsed by the current channel, the AP may send a channel contention packet to perform channel competition.
  • the AP may determine that the BSS contending channel is successful, and the AP does not need to perform the current channel again.
  • Channel competition if the AP resolves the channel contention packet sent by the site of the BSS in the current channel, the AP may determine that the BSS contending channel is successful, and the AP does not need to perform the current channel again.
  • the AP may detect the signal detection energy (first signal detection energy) of the current channel before transmitting the channel contention packet, and determine the energy of the first signal by determining the first signal. Whether it is less than the preset threshold (the first preset threshold can be set according to a specific scenario) determines whether to participate in channel competition. When the AP determines that the first signal detection energy is less than the first preset threshold, the AP may determine to participate in channel competition and send a channel contention packet on the current channel.
  • the signal detection energy first signal detection energy
  • the AP if the AP does not parse the channel competition packet sent by another AP or the station in the current channel after the channel is contending for the current channel, the AP It can be determined that the current channel is successfully contending.
  • the AP when the AP detects the first signal detection energy of the current channel, and determines that the first signal detection energy is equal to or greater than the first preset threshold, the AP may not participate in the current channel.
  • Channel competition is not limited in this embodiment of the present invention.
  • Step 602 After determining that the current channel is successfully contending, according to the receiving condition of the response frame sent by any station of the BSS, the downlink PPDU or the trigger frame is broadcast to the BSS by using the current channel that is successfully contending, in the downlink PPDU or the trigger frame. Includes scheduling information for multiple sites of the BSS.
  • the AP may determine the station to be scheduled (the site of the BSS) by using a preset scheduling policy, and send a downlink PPDU or a trigger frame to the site of the BSS on the current channel.
  • the downlink PPDU or the trigger frame may include scheduling information for the above-mentioned station to be scheduled.
  • the site of the BSS parses the downlink PPDU or the triggering frame, obtains the scheduling information included therein, and performs uplink and/or downlink data transmission according to the corresponding scheduling information.
  • the AP may carry scheduling information for the station to be scheduled in the SIG domain of the downlink PPDU, and the scheduling information may indicate that the AP allocates time-frequency resources to the corresponding station, so that the corresponding station may determine to receive according to the time-frequency resource.
  • the AP uses the current channel that is successfully contending to broadcast the downlink PPDU or the trigger frame to the BSS to determine that the current channel is successful according to the receiving situation of the response frame sent by any station of the BSS.
  • the method may further include the following steps:
  • the station in the BSS parses the channel contention packet sent by the AP of the BSS
  • the station may detect the signal detection energy of the current channel, and determine whether the signal detection energy is smaller than the first pre- Setting a threshold, if less than, using the current channel to send a response frame to the AP of the BSS to generate signal interference to the neighboring station of the station, so that the signal detection energy of the current channel detected by the neighboring station of the station increases.
  • the probability that the neighboring sites of the station participate in the competition for the current channel can be reduced, and the receiving end protection is implemented.
  • the AP may determine whether the response frame sent by the site of the BSS is received on the current channel that is successfully contending, and if received, the AP may consider that the channel exists in the BSS.
  • An idle station whereby the AP can schedule the site of the BSS, and send a downlink PPDU or a trigger frame including scheduling information for the site of the BSS to the site of the BSS on the current channel; otherwise, the AP may not perform the site of the BSS. Scheduling.
  • the above response frame may be CTS, CTX or some newly defined control frame or management frame.
  • the AP broadcasts the downlink PPDU or the trigger frame to the BSS by using the current channel that is successfully contending according to the receiving condition of the response frame sent by any station of the BSS, and may include the following steps:
  • the response frame sent by the site of the BSS; wherein the response frame may include channel state information of the current channel detected by the corresponding station and an identifier of the site;
  • the downlink PPDU or the trigger frame includes adding scheduling information of the multiple stations to be scheduled to the downlink PPDU;
  • the station when the station in the BSS parses the channel contention packet sent by the AP of the BSS, the station may detect the signal detection energy of the current channel, and determine whether the signal detection energy is smaller than the first pre- Setting a threshold, if not, sending a response frame to the AP of the BSS by using the current channel, where the station may randomly select a subchannel from the current channel to send the response frame, where the response frame may include the current detected by the station.
  • Channel state information of the channel, and an identifier of the station, the channel state information may include historical SNR, instantaneous interference strength, and the like.
  • the AP may determine whether the response frame sent by the site of the BSS is received on the current channel that the competition succeeds. If received, the AP may determine, according to the channel state information included in the response frame and the identifier of the site, multiple sites to be scheduled. After generating a downlink PPDU or a trigger frame including the scheduling information of the multiple stations to be scheduled, the downlink PPDU or the trigger frame including the scheduling information of the multiple stations to be scheduled is broadcast to the BSS by using the current channel that is successfully contending.
  • the AP may associate the response frame including the historical SNR greater than the preset threshold according to the channel state information included in the response frame received on the current channel.
  • the site of this BSS is determined to be the site to be scheduled.
  • the AP may include the response that the instantaneous interference strength is less than a preset threshold according to channel state information included in the response frame received on the current channel.
  • the site of the BSS corresponding to the frame is determined as the scheduled site.
  • the above response frame may be an extended CTS, CTX or some newly defined control frame or management frame.
  • FIG. 7 is a schematic flowchart of a channel competition method according to an embodiment of the present invention, which may include the following steps:
  • the execution body of steps 701 to 706 is a processor in a site or a site in the above system architecture, such as a CPU.
  • the following is an example in which the execution body of steps 701 to 706 is a site in the above system architecture.
  • Step 701 Determine whether the channel contention packet sent by the AP of the BSS is parsed on the current channel. If yes, go to step 702; otherwise, end the current process.
  • Step 702 Determine that the BSS competes for the current channel successfully.
  • each BSS may include multiple sites associated with the APs of the BSS, and after the AP performs time-frequency resource scheduling on the site, the site can perform uplink data transmission, and the AP needs to If the channel is successfully contending for the time-frequency resource scheduling, if the AP contends for the channel, the time-frequency resource scheduling of the station cannot be performed, which affects the uplink data transmission of the station. Therefore, in order to improve the data transmission efficiency in the system, it is necessary to improve. The success rate of the AP preempting the channel.
  • the station contending channel in the BSS when the station contending channel in the BSS is successful, the channel usage right is transferred to the AP, that is, in the same BSS, the station can help the AP to preempt the channel, so as to improve the success rate of the AP preempting the channel. .
  • the AP when the AP needs to perform data transmission, and the channel competing packet sent by the station of the current BSS is not parsed by the current channel, the AP may determine whether to participate in channel competition by detecting the signal detection energy of the current channel, and When the detected signal detection energy is lower than a preset threshold (first preset threshold), the AP may send a channel contention packet for channel contention.
  • a preset threshold first preset threshold
  • the station parses the channel contention packet sent by the AP of the BSS on the current channel, it determines that the AP competes for the current channel successfully.
  • the station when the station does not resolve the channel contention packet sent by the AP of the BSS on the current channel, the station may determine whether to participate in channel competition by using the channel idle assessment, that is, detecting the signal detection energy of the current channel. And determining whether to send the channel contention packet to participate in channel competition according to whether the signal is detected to be less than a preset threshold, which is not limited by the embodiment of the present invention.
  • Step 703 Send a response frame to the AP of the BSS in the current channel that is successfully contending, so that the AP of the BSS broadcasts the downlink PPDU or the trigger frame to the BSS by using the current channel that is successfully contending when receiving the response frame.
  • the station receives the channel contention packet sent by the AP of the BSS, and after determining that the BSS contention channel is successful, the station may send a response frame to the AP of the BSS to trigger the AP of the BSS.
  • the site of the BSS is scheduled.
  • the AP may determine the station to be scheduled according to the scheduling policy, and broadcast the downlink PPDU or the trigger frame to the BSS by using the current channel that is successfully contending, where the downlink PPDU or the trigger frame may be
  • the uplink or downlink scheduling information of multiple sites of the BSS is included.
  • Step 704 Receive a downlink PPDU or a trigger frame sent by the AP of the BSS on the current channel that is successfully contending.
  • Step 705 Determine whether the scheduling information for the local station is included in the downlink PPDU or the trigger frame. If the determination is yes, go to step 705; otherwise, end the current flow.
  • Step 706 Perform uplink or downlink data transmission according to scheduling information for the local station included in the downlink PPDU.
  • the station may parse the downlink PPDU or the triggering frame, and determine whether the downlink PPDU or the triggering frame includes scheduling information for the local station. If the downlink PPDU includes scheduling information for the local station, the station may perform uplink or downlink data transmission according to the scheduling information for the local station included in the downlink PPDU.
  • the embodiment of the present invention further provides another channel competition method.
  • the flowchart of another channel competition method according to an embodiment of the present invention may include the following steps. :
  • the execution body of steps 801 to 808 is a processor in a site or a site in the above system architecture, such as a CPU.
  • the following is an example in which the execution body of steps 801 to 808 is a site in the above system architecture.
  • Step 801 Determine whether the channel contention packet sent by the AP of the BSS is parsed on the current channel. If yes, go to step 802; otherwise, end the current process.
  • Step 802 Determine that the BSS competes for the current channel successfully.
  • Step 803 Detect a first signal detection energy of the current channel that is successfully competitive.
  • Step 804 Determine whether the first signal detection energy is less than a first preset threshold. If yes, go to step 805; otherwise, end the current process.
  • Step 805 Send a response frame to the AP of the BSS in the current channel that is successfully contending, so that the AP of the BSS broadcasts the downlink PPDU or the trigger frame to the BSS by using the current channel that the competition succeeds when receiving the response frame.
  • the site of the BSS when the site of the BSS determines that the AP of the BSS competes for the current channel successfully, it can detect the signal detection energy of the current channel (the first signal detection energy), and determine whether the first signal detection energy is less than a preset threshold ( First preset threshold).
  • the station may use the current channel to send a response frame to the AP of the BSS to generate signal interference to the neighboring station of the station, so that the phase of the station is The signal detection energy of the current channel detected by the neighboring station is increased, thereby reducing the probability that the neighboring station of the station participates in competing for the current channel. Receiver protection is now available.
  • the AP when the AP receives the response frame sent by the site of the BSS, the AP may consider that there is a site with the channel idle in the BSS, so that the AP may schedule the site of the BSS, and broadcast the current channel to the BSS.
  • the station when the station sends a response frame to the AP of the BSS, the station may randomly select one subchannel from the current channel, or may send in each subchannel of the current channel.
  • the specific implementation of the embodiments of the present invention is not limited.
  • Step 806 Receive a downlink PPDU or a trigger frame sent by the AP of the BSS on the current channel that is successfully contending.
  • Step 807 Determine whether the scheduling information for the local station is included in the downlink PPDU or the trigger frame. If yes, go to step 808; otherwise, end the current process.
  • Step 808 Perform uplink or downlink data transmission according to the scheduling information for the local station included in the downlink PPDU or the trigger frame.
  • the AP when the AP contends that the current channel is successful, and the current channel receives the response frame sent by the site of the BSS, the AP may determine the station to be scheduled according to the scheduling policy, and broadcast to the BSS by using the current channel.
  • the AP may include scheduling information of the station to be scheduled in the SIG domain in the downlink PPDU, where the scheduling information may indicate that the AP allocates time-frequency resources to the corresponding station, so that the corresponding station may determine to receive according to the time-frequency resource.
  • the time and frequency domain of the downlink data sent by the AP or the time and frequency domain of the uplink data transmission.
  • the site may parse the downlink PPDU or the triggering frame, and determine whether the downlink PPDU or the triggering frame includes scheduling information for the local station, if the downlink PPDU or The triggering frame includes scheduling information for the local station, and the station may perform uplink or downlink data transmission according to the scheduling information for the local station included in the downlink PPDU or the triggering frame.
  • the station determines that the downlink PPDU or the trigger frame includes the scheduling information for the local station, and performs uplink according to the scheduling information for the local station included in the downlink PPDU or the trigger frame. Or before the downlink data transmission, the following steps can also be included:
  • different CCA thresholds are set for the channel competition phase and the data transmission phase: in the channel competition phase, whether the detected signal is detected by the detected signal is less than the first preset threshold. Determining whether to perform channel competition; in the data transmission phase, determining whether to perform data transmission by determining whether the detected signal detection energy is less than a second preset threshold.
  • the first preset threshold and the second preset threshold may be set according to a specific scenario, for example, the first preset threshold is -82dbm, and the second preset threshold is -62dbm; preferably, the first preset threshold is greater than the second Preset threshold.
  • the station may perform uplink or downlink data transmission according to the scheduling information for the local station included in the downlink PPDU.
  • the embodiment of the present invention further provides another channel competition method.
  • the flowchart of another channel competition method according to an embodiment of the present invention may include the following steps. :
  • steps 901 to 908 is a processor in a site or a site in the above system architecture, such as a CPU.
  • the execution body of steps 901 to 908 is a site in the above system architecture.
  • Step 901 Determine whether the channel contention packet sent by the AP of the BSS is parsed on the current channel. If yes, go to step 902; otherwise, end the current process.
  • Step 902 Determine that the BSS competes for the current channel successfully.
  • Step 903 Detect a first signal detection energy of the current channel that is successfully competitive.
  • Step 904 Determine whether the first signal detection energy is less than a first preset threshold. If yes, go to step 905; otherwise, end the current process.
  • Step 905 randomly select a subchannel from the current channel that is successfully contending, and use the subchannel to send a response frame to the AP of the BSS, where the response frame includes channel state information of the current channel of the contention successfully detected by the local end. And the identifier of the local end, so that the AP of the BSS determines the station to be scheduled according to the channel state information included in the received response frame and the identifier of the station.
  • the station of the BSS when the station of the BSS determines that the AP of the BSS competes for the current channel successfully, it can detect the signal detection energy (first signal detection energy) of the current channel that is successfully competitive, and determine whether the first signal detection energy is less than Preset threshold (first preset threshold).
  • the station may randomly select a subchannel from the currently successful contention channel, and use the subchannel to send a response frame to the AP of the BSS, the response.
  • the frame may include channel state information of the current channel of the competition successfully detected by the station, and an identifier of the station.
  • the channel state information may include a historical SNR, a transient interference strength, and the like.
  • the AP may determine the station to be scheduled according to the channel state information included in the response frame and the identifier of the site, and then the AP may schedule the to-be-scheduled site of the BSS. Broadcasting a downlink PPDU or a trigger frame including scheduling information of the station to be scheduled to the current BSS on the current channel; otherwise, the AP may not schedule the site of the BSS.
  • the AP when multiple sites select the same subchannel of the current channel to send a response frame, the AP may not be able to parse out the response frame sent by the multiple sites. In this case, the AP may reuse the response frame.
  • the current channel contends to the BSS broadcast channel to compel the packet, so that the station of the BSS randomly selects one subchannel to send a response frame to the AP of the BSS after the current channel resolves the channel contention packet sent by the AP of the BSS, until the AP parses the AP. All response frames are output.
  • Step 906 Receive a downlink PPDU or a trigger frame sent by the AP of the BSS on the current channel that is successfully contending.
  • Step 907 Determine whether the downlink PPDU or the trigger frame includes scheduling for the local station. information. If yes, go to step 908; otherwise, end the current process.
  • Step 908 Perform uplink or downlink data transmission according to the scheduling information for the local station included in the downlink PPDU or the trigger frame.
  • the AP when the AP contends that the current channel is successful, and the current channel successfully obtained by the AP receives the response frame sent by the site of the BSS, the AP may determine the channel state information included in the response frame and the identifier of the site.
  • the AP may include scheduling information of the station to be scheduled in the SIG domain in the downlink PPDU, where the scheduling information may indicate that the AP allocates time-frequency resources to the corresponding station, so that the corresponding station may determine to receive according to the time-frequency resource.
  • the site may parse the downlink PPDU or the triggering frame, and determine whether the downlink PPDU or the triggering frame includes scheduling information for the local station, if the downlink PPDU or The triggering frame includes scheduling information for the local station, and the station may perform uplink and/or downlink data transmission according to the scheduling information for the local station included in the downlink PPDU or the triggering frame.
  • the station determines that the received downlink PPDU or the trigger frame includes the scheduling information for the local site, according to the scheduling of the local site included in the downlink PPDU or the trigger frame.
  • the foregoing steps 71) to 73) may be further described. For the specific implementation, refer to the related description in the method flow described in FIG.
  • the channel usage right is transferred to the AP in the BSS, thereby improving the probability that the AP competes for the channel, and thus improves.
  • the data transmission performance of the system in addition, by setting different CCA thresholds for the channel competition phase and the data transmission phase, the data transmission capability of the system can be further improved.
  • the embodiment of the present invention provides a communication device, which may be an AP or a processor applied to an AP, as shown in FIG.
  • a schematic structural diagram of a communication device provided by the embodiment may include:
  • the channel competition module 1001 is configured to determine whether the channel contention packet sent by any station of the BSS is parsed on the current channel; if yes, determine that the current BSS competes for the current channel.
  • the data transmission module 1002 is configured to broadcast, by using the current channel that is successfully contending, a downlink physical layer protocol data unit PPDU or a trigger frame to the local BSS, where the downlink PPDU or the trigger frame includes multiple sites for the local BSS Uplink or downlink scheduling information.
  • each BSS may include multiple sites associated with the APs of the BSS, and after the AP performs time-frequency resource scheduling on the site, the site can perform uplink data transmission, and the AP needs to If the channel is successfully contending for the time-frequency resource scheduling, if the AP contends for the channel, the time-frequency resource scheduling of the station cannot be performed, which affects the uplink data transmission of the station. Therefore, in order to improve the data transmission efficiency in the system, it is necessary to improve. The success rate of the AP preempting the channel.
  • the station contending channel in the BSS when the station contending channel in the BSS is successful, the channel usage right is transferred to the AP, that is, in the same BSS, the station can help the AP to preempt the channel, so as to improve the success rate of the AP preempting the channel. .
  • the station when the station needs to perform data transmission, the station may determine whether to participate in channel competition by detecting the signal detection energy of the current channel, and when the detected signal detection energy is lower than a preset threshold (first preset threshold) At the time, the station can send a channel contention packet for channel contention.
  • a preset threshold first preset threshold
  • the station can send a channel contention packet for channel contention.
  • the AP resolves the channel contention packet sent by the site of the BSS on the current channel, it determines that the current channel is successfully contending.
  • the data transmission module 1002 can be enabled to schedule the site of the BSS.
  • the data transmission module 1002 may broadcast a downlink PPDU or a trigger frame to the BSS by using the current channel that is successfully contending, and the downlink PPDU or the trigger frame includes scheduling information for multiple sites of the BSS.
  • the station of the local BSS that receives the downlink PPDU performs uplink or downlink data transmission according to the corresponding scheduling information included in the downlink PPDU or the trigger frame.
  • the channel contention module 1001 may be further configured to: after determining that the current BSS is contending for the current channel, record, in a preset time period, parse the current channel transmission channel competition packet in the contention success.
  • the data transmission module 1002 may be further configured to determine scheduling information of multiple sites corresponding to the identifiers of the multiple sites; generate a downlink PPDU or a trigger frame, where the downlink PPDU or the trigger frame includes multiple sites. Dispatching information; broadcasting, by using the current channel that the competition is successful, a downlink PPDU or a trigger frame including scheduling information of the multiple stations to the local BSS.
  • a time period may be set in advance (the time period may be set according to a specific scenario, which is described as T).
  • T the time period may be set according to a specific scenario, which is described as T.
  • the AP and its associated site in each BSS The idle channel estimation may be performed, that is, whether the signal detection energy of the current channel is less than a preset threshold, and when the signal detection energy of the current channel is detected to be less than a preset threshold (the first preset threshold), the channel competition packet is sent to Perform channel competition.
  • the AP When the AP receives the channel contention packet sent by the site of the BSS, the AP determines that the current channel is successfully contending, and the AP can collect the channel contention packet sent by the site of the BSS that is parsed in the preset time period T, and records the The identifier of the plurality of sites of the BSS of the current channel transmission channel contention packet is parsed in the preset time period T.
  • the channel competition module 1001 may record, in a preset time period T, parsing multiple sites of the BSS of the current channel transmission channel contention packet, and preset time After the segment arrives, the data transmission module 1002 is enabled. After the channel competition module 1001 is enabled, the data transmission module 1002 can determine scheduling information of multiple sites corresponding to the identifiers of the multiple sites, and generate a schedule including the multiple sites. The downlink PPDU or the trigger frame of the information, and then the downlink PPDU or the trigger frame including the scheduling information of the multiple sites is broadcast to the BSS by using the current channel that is successfully contending.
  • the channel contention module 1001 may be further configured to: after determining that the current BSS competes for the current channel, the current channel of the BSS that is parsed in the preset time period is successfully synchronized. Transmitting a channel contention packet; the channel contention packet includes channel state information of the current channel that is successfully struck by the corresponding station;
  • the data transmission module 1002 is further configured to determine, according to the channel state information included in the parsed channel contention packet, a plurality of stations to be scheduled; and generate a downlink that includes scheduling information of the multiple stations to be scheduled. a PPDU or a trigger frame; broadcasting, by using the current channel that the competition is successful, a downlink PPDU or a trigger frame including scheduling information of the multiple stations to be scheduled to the local BSS.
  • a time period may be set in advance (the time period may be set according to a specific scenario, which is described as T).
  • the AP in each BSS, the AP The associated channel can perform idle channel estimation, that is, whether the signal detection energy of the current channel is less than a preset threshold, and when the signal detection energy of the current channel is detected to be less than a preset threshold (first preset threshold), The channel contends the packet to perform channel competition.
  • the channel contention packet may also include channel state information of the current channel detected by the station, such as historical SNR, instantaneous interference strength, and the like.
  • the channel contending module 1001 determines that the current BSS is contending for the current channel
  • the channel competition packet sent by the site of the BSS that is parsed in the preset time period T on the current channel is included, and the channel competition packet includes the corresponding
  • the channel state information of the current channel detected by the station is enabled, and after the preset time period is reached, the data transmission module 1002 is enabled; after the channel contention module 1001 is enabled, the data transmission module 1002 can compose the packet according to the parsed channel.
  • the channel state information included in the system determines a plurality of stations to be scheduled, and generates a downlink PPDU or a trigger frame including scheduling information of the multiple sites, such as adding scheduling information of the multiple sites to the SIG domain in the downlink PPDU. Then, the downlink PPDU or the trigger frame including the scheduling information of the multiple stations to be scheduled is broadcast to the BSS by using the current channel with successful competition.
  • the channel contention packet is sent when the station needs to perform data transmission, and detects that the signal detection energy of the current channel is less than a first preset threshold
  • the communication device shown in FIG. 10 may further include:
  • the signal detecting module 1003 is configured to detect signal detection energy of the current channel that is successfully competitive;
  • the data transmission module 1002 is further configured to: when the signal detection module 1003 detects the second preset threshold of the signal detection energy of the currently successful channel, use the current channel that is successfully contending to the BSS. Broadcast downlink PPDU or trigger frame.
  • the second preset threshold is different from the first preset threshold.
  • different CCA thresholds are set for the channel competition phase and the data transmission phase: in the channel competition phase, whether the detected signal is detected by the detected signal is less than the first preset threshold. Determining whether to perform channel competition; in the data transmission phase, determining whether to perform data transmission by determining whether the detected signal detection energy is less than a second preset threshold.
  • the first preset threshold and the second preset gate The limit may be set according to a specific scenario, for example, the first preset threshold is -82dbm, and the second preset threshold is -62dbm; preferably, the first preset threshold is greater than the second preset threshold.
  • the signal detection module 1002 may first detect the signal detection energy of the currently successful channel, and determine the detected signal detection energy of the current channel. Whether it is less than the second preset threshold to determine whether to perform data transmission. When the detected signal detection energy of the current channel is less than the second preset threshold, the data transmission module 1002 may send a downlink PPDU or a trigger frame to the site of the BSS on the current channel that is successfully contending.
  • the signal detecting module 1003 may be specifically configured to: detect signal detection energy of the entire bandwidth of the current channel that is successfully competitive; or detect signal detection energy of each subband of the current channel that is successfully competitive. .
  • the data transmission module 1002 may be specifically used when the current channel of the competition is successful.
  • the signal detection energy of the sub-band is less than the second preset threshold, determining that the detected signal detection energy of the current channel is less than a second preset threshold; otherwise, determining that the detected signal detection energy of the current channel is greater than or Equal to the second preset threshold.
  • the corresponding second preset threshold may be different.
  • the threshold of the channel idle evaluation (the second preset threshold) on the entire bandwidth is CCAdata
  • the threshold of the channel idle evaluation on each subband is used. Can be 1/8*CCAdata.
  • FIG. 11 is a schematic structural diagram of an AP according to an embodiment of the present invention.
  • the AP shown in FIG. 11 may include a bus 1104, a processor 1101 interconnected with the bus, a memory 1102, and an input/output module 1103, where the program code is stored in the memory 1102, and the processing is performed.
  • the device 1101 is configured to invoke the program code stored in the memory 1102, and performs the following operations:
  • the downlink PPDU or the trigger frame transmitting, by the input/output module 1003, the downlink PPDU or the trigger frame to the local BSS by using the current channel that is successfully contending, and the downlink PPDU or the trigger frame includes uplink or downlink scheduling information for multiple sites of the local BSS.
  • the processor 1101 is configured to invoke the program code stored in the memory 1102 to determine that the current BSS competes for the current channel successfully, and utilize the current success of the competition through the input and output module 1003. Before the channel broadcasts the downlink PPDU or the trigger frame to the local BSS, the following operations may also be performed:
  • the processor 1101 is configured to invoke the program code stored in the memory 1102 to broadcast a downlink PPDU or a trigger frame to the local BSS by using the current channel that is successfully contending through the input and output module 1003.
  • a downlink PPDU or a trigger frame including scheduling information of the plurality of stations is broadcast to the local BSS by the input/output module 1003 using the current channel of the contention success.
  • the processor 1101 is configured to invoke the program code stored in the memory 1102 to determine that the current BSS competes for the current channel successfully, and utilize the current success of the competition through the input and output module 1003. Before the channel broadcasts the downlink PPDU or the trigger frame to the local BSS, the following operations may also be performed:
  • the channel contention packet includes a channel state of the current channel that is successfully contiguously detected by the corresponding station. information
  • the processor 1101 is configured to invoke the program code stored in the memory 1102 to broadcast a downlink PPDU or a trigger frame to the local BSS by using the current channel that is successfully contending through the input and output module 1003, including:
  • a downlink PPDU or a trigger frame including scheduling information of the plurality of stations to be scheduled is broadcast to the local BSS by the input/output module 1003 using the current channel that is successfully contending.
  • the channel contention packet is sent when the station needs to perform data transmission, and detects that the signal detection energy of the current channel is less than a first preset threshold
  • the processor 1101 is configured to call the program code stored in the memory 1102 to perform the following operations before the downlink PPDU or the trigger frame is broadcast to the local BSS by using the current channel of the contention succession by the input/output module 1003:
  • Detecting the signal detection energy of the current channel that is successfully contending determining whether the detected signal detection energy of the currently successful channel is less than a second preset threshold; the second preset threshold is different from the first pre-predetermined Set a threshold;
  • the step of broadcasting the downlink PPDU or the trigger frame to the BSS by using the current channel with the contention successfully by the input/output module 1003 is performed.
  • the processor 1101 is configured to invoke the program code stored in the memory 1102 to detect the signal detection energy of the currently successful channel, including:
  • the processor 1101 when detecting the signal detection energy of each subband of the current channel that is successfully contending, the processor 1101 is configured to invoke the program code stored in the memory 1102 to determine that the detected competition is successful. Whether the signal detection energy of the current channel is less than the second preset threshold includes:
  • the AP shown in FIG. 11 only indicates components required for performing the channel contention method provided by the embodiment of the present invention, and the present invention implements other components such as a physical button, a power source, a casing, and the like that the AP can have.
  • the examples are not labeled as this does not affect the implementation of the embodiments of the present invention.
  • the embodiment of the present invention provides a communication device based on the system architecture shown in FIG.
  • the communication device may be a site or a processor applied to the site.
  • FIG. 12 it is a schematic structural diagram of a communication device according to an embodiment of the present invention, which may include:
  • the channel contention module 1201 is configured to: when the station needs to perform data transmission, and does not parse the channel contention packet sent by the AP of the BSS in the current channel, send a channel contention packet on the current channel, so that the current BSS When the current channel parses the channel contention packet, the AP determines that the current BSS is contending for the current channel;
  • a data transmission module 1202 configured to receive a downlink PPDU or a trigger frame sent by the AP of the local BSS on the current channel that is successfully contending; when the downlink PPDU or the trigger frame includes scheduling information for the local station, according to Performing uplink or downlink data transmission by using the scheduling information for the local station included in the downlink PPDU or the trigger frame.
  • each BSS may include multiple sites associated with the APs of the BSS, and after the AP performs time-frequency resource scheduling on the site, the site can perform uplink data transmission, and the AP needs to If the channel is successfully contending for the time-frequency resource scheduling, if the AP contends for the channel, the time-frequency resource scheduling of the station cannot be performed, which affects the uplink data transmission of the station. Therefore, in order to improve the data transmission efficiency in the system, it is necessary to improve. The success rate of the AP preempting the channel.
  • the station contending channel in the BSS when the station contending channel in the BSS is successful, the channel usage right is transferred to the AP, that is, in the same BSS, the station can help the AP to preempt the channel, so as to improve the success rate of the AP preempting the channel. .
  • the station when a station in the BSS needs to perform data transmission, and the channel contention packet sent by the AP of the BSS is not parsed on the current channel, the station may send a channel contention packet to perform channel competition.
  • the signal contention module may send a channel contention packet on the current channel, so that the AP of the BSS is parsed in the current channel.
  • the channel contends the packet it is determined that the current BSS is contending for the current channel.
  • the data transmission module 1002 may receive the downlink PPDU or the trigger frame sent by the AP of the BSS on the current channel that is successfully contending after the BSS contends for the current channel. And when the downlink PPDU or the trigger frame includes the scheduling information for the local station, performing uplink or downlink data transmission according to the scheduling information for the local station included in the downlink PPDU or the trigger frame.
  • the channel contention packet may include channel state information of the current channel, so that the AP of the BSS determines the target station to be scheduled according to the channel state information.
  • the communication device shown in FIG. 12 may further include:
  • the signal detecting module 1203 is configured to detect first signal detection energy of the current channel
  • the channel competition module 1201 may be specifically configured to: when the first signal detection energy detected by the signal detection module 1203 is less than a first preset threshold, send a channel competition packet on the current channel;
  • the signal detection module 1203 may be further configured to: if the downlink PPDU or the trigger frame includes scheduling information for the local station, detect the second signal detection energy of the current channel that is successfully contending;
  • the data transmission module 1202 may be specifically configured to: when the second signal detection energy detected by the signal detection module 1203 is less than a second preset threshold, according to the downlink PPDU or the trigger frame, for the site
  • the scheduling information is used for uplink or downlink data transmission.
  • different CCA thresholds are set for the channel competition phase and the data transmission phase: in the channel competition phase, whether the detected signal is detected by the detected signal is less than the first preset threshold. Determining whether to perform channel competition; in the data transmission phase, determining whether to perform data transmission by determining whether the detected signal detection energy is less than a second preset threshold.
  • the first preset threshold and the second preset threshold may be set according to a specific scenario, for example, the first preset threshold is -82dbm, and the second preset threshold is -62dbm; preferably, the first preset threshold is smaller than the second Preset threshold.
  • the station may detect the first signal detection energy of the current channel by using the signal detection module 1003, and When the first signal detection energy is less than the first preset threshold, the enabled channel contention module 1201 performs channel competition on the current channel transmission channel competition packet.
  • the station may also detect that the competition is successful by the signal detecting module 1203 before performing the data transmission.
  • the second signal of the current channel detects energy, and when the second signal detection energy is less than the second preset threshold, the enabling data transmission module 1202 performs the scheduling information for the local station included in the downlink PPDU or the trigger frame. Uplink or downlink data transmission.
  • the signal detecting module 1003 may be specifically configured to: detect a second signal detection energy of the entire bandwidth of the current channel that is successfully contending; or detect the downlink in the current channel that is successfully contending.
  • FIG. 13 is a schematic structural diagram of a station according to an embodiment of the present invention.
  • the station shown in FIG. 13 may include: a bus 1304, and a processor 1301, a memory 1302 interconnected with the bus, and an input and output module 1303, where the program code is stored in the memory 1302, and the processor 1301 is used to invoke the program code stored in the memory 1302, and performs the following operations:
  • the output output module 1303 sends a channel contention packet on the current channel, so that the AP of the BSS is in the office. Determining that the current BSS competes with the current channel when the current channel parses the channel contention packet;
  • the output/output module 1303 performs uplink or downlink data transmission according to the scheduling information for the local station included in the downlink PPDU or the trigger frame.
  • the channel contention packet includes channel state information of the current channel, so that the AP of the BSS determines the target station to be scheduled according to the channel state information.
  • the processor 1301 invokes the program code stored in the memory 1302 to perform the following operations before the channel competing packet is sent by the input/output module 1303 on the current channel:
  • the uplink information is performed according to the scheduling information of the local end included in the downlink PPDU or the trigger frame, or Before the downlink data transmission, it also includes:
  • Detecting a second signal detection energy of the current channel that is successfully contending determining whether the second signal detection energy is less than a second preset threshold; the second preset threshold is different from the first preset threshold;
  • the step of performing uplink or downlink data transmission by the input/output module 1303 according to the scheduling information for the local station included in the downlink PPDU or the trigger frame is performed.
  • the processor 1301, by using the program code stored in the memory 1302, to detect the second signal detection energy of the current channel that is successfully contending may specifically include:
  • the second signal detection energy of the subband indicated by the scheduling information of the local station included in the current channel Detecting, in the PPDU or the trigger frame, the second signal detection energy of the subband indicated by the scheduling information of the local station included in the current channel.
  • the station shown in FIG. 13 only indicates the components required for performing the channel contention method provided by the embodiment of the present invention, and the present invention implements other components such as a physical button, a power source, a casing, and the like which can be provided by the site.
  • the examples are not labeled as this does not affect the implementation of the embodiments of the present invention.
  • an embodiment of the present invention provides a communication device, which may be an AP or a processor applied to an AP, as shown in FIG. 14 , which is a A schematic structural diagram of a communication device, which may include:
  • the channel competition module 1401 is configured to: when the AP needs to perform data transmission, and does not parse out a channel contention packet sent by any station of the basic service set BSS, the channel is used to transmit a channel competition packet on the current channel, to Perform channel competition;
  • a data transmission module configured to broadcast a downlink physical layer to the local BSS by using the current channel that is successfully contending according to the receiving situation of the response frame sent by any station of the current BSS after determining that the current channel is successfully contending
  • the protocol data unit PPDU or the trigger frame includes scheduling information for multiple sites of the BSS in the downlink PPDU or the trigger frame.
  • each BSS includes multiple sites associated with the APs of the BSS, and the AP performs time-frequency resource scheduling on the site
  • the site can perform the site. Uplink data transmission, and the AP needs to successfully contend to the channel to perform time-frequency resource scheduling for the station. If the AP contends for the channel, the time-frequency resource scheduling of the station cannot be performed, thereby affecting the uplink data transmission of the station. Therefore, in order to improve the system The data transmission efficiency needs to improve the success rate of the AP preempting the channel.
  • the station contending channel in the BSS when the station contending channel in the BSS is successful, the channel usage right is transferred to the AP, that is, in the same BSS, the station can help the AP to preempt the channel, so as to improve the success rate of the AP preempting the channel. .
  • the AP when an AP in the BSS needs to perform data transmission, and the channel competition packet sent by the site of the BSS is not parsed by the current channel, the AP may send a channel competition packet to perform channel competition.
  • any station in the BSS may send a response frame to the AP of the BSS to trigger the AP of the BSS to schedule the site of the BSS.
  • the AP may schedule the site of the BSS according to the reception condition of the response frame sent by any station of the BSS.
  • the data transmission module 1402 may be specifically configured to: when the response frame sent by any station that is successfully contending, broadcast the said channel to the BSS by using the current channel that is successfully contending Downstream PPDU or trigger frame.
  • the station in the BSS can determine that the BSS competes for the current channel, and the station can detect the signal detection energy of the current channel that is successfully competitive, and determine Whether the signal detection energy is less than the first preset threshold, if not, sending a response frame to the AP of the BSS by using the current channel with successful competition to generate signal interference to the neighboring station of the station, so that the neighbor of the station.
  • the signal detection energy of the current channel that the station successfully detects is increased, so that the probability that the neighboring station of the station participates in the competition for the current channel can be reduced, and the receiving end protection is implemented.
  • the AP may consider that there is a station with the channel idle in the BSS, and thus, the AP may The station performs scheduling, and includes, by the data transmission module 1402, a downlink PPDU or a trigger frame including scheduling information for multiple sites of the BSS to the current BSS on the current channel that is successfully contending; otherwise, the AP may not The BSS site is scheduled.
  • the data transmission module 1402 may be specifically configured to: when the response frame sent by the site of the local BSS is received on the current channel with successful contention, the response frame is included in the response frame. Determining, by the corresponding station, the channel state information of the currently successful channel and the identifier of the station, determining a plurality of stations to be scheduled according to the channel state information included in the response frame and the identifier of the station; generating the a downlink PPDU or a trigger frame of scheduling information of a plurality of stations to be scheduled; and a downlink PPDU or a trigger frame including scheduling information of the plurality of stations to be scheduled is broadcast to the local BSS by using the current channel that is successfully contending.
  • the station in the BSS can consider that the BSS competes for the current channel, and the station can detect the signal detection energy of the current channel that is successfully competitive, and determine Whether the signal detection energy is less than the first preset threshold, if not, sending a response frame to the AP of the BSS by using the current channel with successful competition, wherein the station can randomly select one subchannel from the current channel with successful competition.
  • the response frame is sent, and the response frame may include channel state information of the current channel that is successfully tracked by the station, and an identifier of the station, where the channel state information may include a historical SNR, a transient interference strength, and the like.
  • the AP receives the response frame sent by the station of the BSS, and the response frame includes the channel of the current channel that the station successfully authenticates successfully.
  • the data transmission module 1402 may determine a plurality of stations to be scheduled according to the channel state information included in the response frame and the identifier of the station, and generate a downlink PPDU or a trigger frame including scheduling information of the multiple stations to be scheduled.
  • the downlink channel or the trigger frame including the scheduling information of the multiple stations to be scheduled is broadcast to the current BSS by using the current channel that is successfully contending.
  • the communication device shown in FIG. 14 may further include:
  • the signal detecting module 1403 is configured to detect first signal detection energy of the current channel
  • the channel contention module 1401 may be specifically configured to: when the first signal detection energy detected by the signal detection module 1403 is less than a first preset threshold, send a channel contention packet on the current channel;
  • the response frame is a site of the local BSS parsing the BSS on the current channel
  • the channel that the AP sends the contention packet and detects that the signal detection energy of the current channel is less than the first preset threshold, the current channel is sent to the AP of the local BSS;
  • the signal detecting module 1403 may be further configured to detect a second signal detecting energy of the channel
  • the data transmission module 1402 may be specifically configured to: when the second signal detection energy detected by the signal detection module 1403 is less than a second preset threshold, use the current channel with successful competition to the local BSS Broadcasting a downlink PPDU or a trigger frame; the second preset threshold is different from the first preset threshold.
  • FIG. 15 is a schematic structural diagram of an AP according to an embodiment of the present invention.
  • the AP shown in FIG. 15 may include a bus 1504, and a processor 1501, a memory 1502, and an input and output module 1503, which are interconnected with the bus, in which the program code is stored, and the processing is performed.
  • the device 1501 is configured to invoke the program code stored in the memory 1502, and performs the following operations:
  • the channel competition packet is sent by the input/output module 1503 on the current channel to perform channel competition;
  • the downlink physical layer protocol is broadcasted to the local BSS by using the current channel with successful contention through the input and output module 1503.
  • the processor 1501 sends the program code stored in the memory 1502 to send the downlink PPDU or the trigger frame according to the receiving condition of the response frame sent by any station of the current BSS, which may specifically include :
  • the downlink PPDU or the trigger frame is broadcast to the BSS by the input/output module 1503 using the current channel that is successfully contending.
  • the processor 1501 invokes the program code stored in the memory 1502 to send the message according to the reception status of the response frame sent by any station of the current BSS.
  • the downlink PPDU or the trigger frame may specifically include:
  • the response frame includes channel state information of the current channel that is successfully contending for the corresponding station and the The identity of the site;
  • a downlink PPDU or a trigger frame including scheduling information of the plurality of stations to be scheduled is broadcast to the local BSS by the input/output module 1503 using the current channel that is successfully contending.
  • the processor 1501 calls the program code stored in the memory 1502 to send the channel contention packet to the current channel through the input and output module 1503, and may further perform the following steps:
  • Detecting a first signal detection energy of the current channel determining whether the first signal detection energy is less than a first preset threshold; if yes, performing a step of transmitting a channel contention packet on the current channel through the input/output module 1503;
  • the response frame is a channel contention packet sent by the AP of the current BSS when the current channel resolves the AP of the current BSS, and when the signal detection energy of the current channel is detected to be less than the first preset threshold, The current channel is sent to the AP of the BSS;
  • the processor 1501 may further perform the following operations before the program code stored in the memory 1502 broadcasts the downlink PPDU or the trigger frame to the local BSS by using the current channel with the contention success through the input and output module 1503:
  • Detecting a second signal detection energy of the current channel determining whether the second signal detection energy is less than a second preset threshold; the second preset threshold is different from the first preset threshold;
  • the second signal detection energy is less than the second preset threshold, performing the step of broadcasting the downlink PPDU or the trigger frame to the local BSS by using the current channel with the contention success through the input and output module 1503.
  • the AP shown in FIG. 15 only indicates the components required in the AP for performing the channel contention method provided by the embodiment of the present invention, and the physical buttons that the AP can have, Other components such as the power supply, the housing, and the like are not labeled in the embodiments of the present invention, as this does not affect the implementation of the embodiments of the present invention.
  • an embodiment of the present invention provides a communication device, which may be an AP or a processor applied to an AP, as shown in FIG. 16 , which is a A schematic structural diagram of a communication device, which may include:
  • the channel contention module 1601 is configured to determine whether the channel competition packet sent by the access point AP of the BSS is parsed in the current channel; if yes, determining that the current BSS is contending for the current channel;
  • a data transmission module 1602 configured to send a response frame to the AP of the local BSS on the current channel that is successfully contending, so that the AP of the local BSS uses the current success of the competition when receiving the response frame.
  • the channel broadcasts a downlink PPDU or a trigger frame to the local BSS; the downlink physical layer protocol data unit PPDU sent by the AP of the local BSS is received on the current channel that is successfully contending; and the downlink PPDU or the trigger frame includes The uplink or downlink data transmission is performed according to the scheduling information for the local station included in the downlink PPDU or the trigger frame.
  • each BSS includes multiple sites associated with the APs of the BSS, and the AP can perform uplink data transmission after the time-frequency resource scheduling of the site, and the AP needs to successfully compete for the channel.
  • the time-frequency resource scheduling of the station is performed. If the AP fails to contend for the channel, the time-frequency resource scheduling of the station cannot be performed, thereby affecting the uplink data transmission of the station. Therefore, in order to improve the data transmission efficiency in the system, the success rate of the AP preempting channel needs to be improved. .
  • the station contending channel in the BSS when the station contending channel in the BSS is successful, the channel usage right is transferred to the AP, that is, in the same BSS, the station can help the AP to preempt the channel, so as to improve the success rate of the AP preempting the channel. .
  • the AP when the AP needs to perform data transmission, and the channel competition packet sent by the site of the BSS is not parsed by the current channel, the AP may send a channel contention packet to perform channel competition.
  • the station parses out the channel contention packet sent by the AP of the BSS on the current channel, it determines that the BSS competes for the current channel successfully.
  • Any station in the BSS determines the channel competition sent by the AP that resolves the BSS on the current channel.
  • the response frame may be sent to the AP of the BSS to trigger the AP of the BSS to schedule the site of the BSS.
  • the AP when the AP competes for the current channel and receives the response frame sent by the site of the BSS, the AP may broadcast the scheduling information including the multiple sites for the BSS to the BSS by using the current channel that is successfully contending. Downstream PPDU or trigger frame.
  • the data transmission module 1602 can determine whether the downlink PPDU or the trigger frame includes scheduling information for the local station, and when included, according to the downlink PPDU. Or the scheduling information for the local station included in the trigger frame is used for uplink or downlink data transmission.
  • the AP may include scheduling information of the station to be scheduled in the SIG domain in the downlink PPDU, where the scheduling information may indicate that the AP allocates time-frequency resources to the corresponding station, so that the corresponding station may determine to receive according to the time-frequency resource.
  • the communication device shown in FIG. 16 may further include:
  • a signal detecting module 1603, configured to detect first signal detection energy of the current channel
  • the data transmission module 1602 may be specifically configured to: when the first signal detection energy detected by the signal detection module 1603 is less than a first preset threshold, in the competition The successful current channel transmits a response frame to the AP of the present BSS.
  • the enable signal detection module 1603 may detect the first signal detection energy of the currently successful channel; when the signal detection module 1603 detects the contention
  • the data transmission module 1602 can be enabled when the first signal detection energy of the successful current channel is less than the first preset threshold. After the signal detection module 1603 is enabled, the data transmission module 1602 can be used to the current BSS on the current channel.
  • the AP sends a response frame to generate signal interference to the neighboring stations of the station, so that the signal detection energy of the current channel detected by the neighboring station of the station increases, thereby reducing the neighboring sites of the station to participate in the competition.
  • the probability of the current channel is implemented at the receiving end.
  • the AP when the AP receives the response frame sent by the site of the BSS, the AP may consider that there is a site with the channel idle in the BSS, so that the AP may schedule the site of the BSS, and broadcast the current channel to the BSS.
  • the data transmission module 1602 may be specifically configured to successfully succeed from the competition when the first signal detection energy detected by the signal detection module 1603 is less than the first signal detection energy. Selecting a subchannel in the current channel, and transmitting the response frame to the AP of the local BSS by using the subchannel, where the response frame includes a channel state of the current channel that is successfully competed by the local station. And the identifier of the local station, so that the AP of the BSS determines the station to be scheduled according to the channel state information included in the received response frame and the identifier of the station.
  • the enable signal detection module 1603 may detect the first signal detection energy of the currently successful channel; when the signal detection module 1603 detects the contention When the first signal detection energy of the successful current channel is less than the first preset threshold, the data transmission module 1602 can be enabled; after the signal detection module 1603 is enabled, the data transmission module 1602 can randomly select from the currently successful contention channel. And a sub-channel, and using the sub-channel to send a response frame to the AP of the BSS, where the response frame includes channel state information of the current channel successfully detected by the local station, and an identifier of the local station.
  • the AP may determine the station to be scheduled according to the channel state information included in the response frame and the identifier of the site, and then the AP may schedule the to-be-scheduled site of the BSS. Broadcasting a downlink PPDU including scheduling information of the station to be scheduled to the current BSS on the current channel; otherwise, the AP may not schedule the site of the BSS.
  • the signal detection module 1603 may be further configured to: after the scheduling information for the local station is included in the downlink PPDU or the trigger frame, detect a second signal detection of the current channel that is successfully contending. energy;
  • the data transmission module 1602 may be further configured to: according to the scheduling information included in the downlink PPDU or the trigger frame, when the second signal detection energy detected by the signal detection module 1603 is less than a second preset threshold Perform uplink or downlink data transmission.
  • the signal detection module 1603 may be specifically configured to detect the second signal detection energy of the entire bandwidth of the current channel that is successfully contending; or detect the PPDU in the current channel that is successfully contending for competition or The second signal detection energy of the subband indicated by the scheduling information for the local station included in the trigger frame is triggered.
  • FIG. 17 is a schematic structural diagram of a station according to an embodiment of the present invention.
  • the station shown in FIG. 17 may include a bus 1704, and a processor 1701, a memory 1702 interconnected with the bus, and an input and output module 1703, in which the program code is stored, and the processing is performed.
  • the device 1701 is configured to invoke the program code stored in the memory 1702, and performs the following operations:
  • the BSS broadcasts a downlink PPDU or a trigger frame
  • the input/output module 1703 performs uplink or downlink data transmission according to the scheduling information for the local station included in the downlink PPDU or the trigger frame.
  • the processor 1701 invokes the program code stored in the memory 1702 to determine that the current BSS competes for the current channel successfully, and the current channel direction through the input and output module 1703 in the contention success. Before the AP of the BSS sends the response frame, the following operations can also be performed:
  • the processor 1701 invokes the program code stored in the memory 1702 to determine that the current BSS competes for the current channel successfully, and the current channel direction through the input and output module 1703 in the contention success. Before the AP of the BSS sends the response frame, the following operations can also be performed:
  • the response frame by using the subchannel to send the response frame to the AP of the local BSS, where the response frame includes the local station detecting The channel state information of the current channel that competes successfully, and the identifier of the local station, so that the AP of the current BSS determines the to-be-scheduled according to the channel state information included in the received response frame and the identifier of the station. Site.
  • the processor 1701 invokes the program code stored in the memory 1702 to determine that the downlink PPDU or the trigger frame includes scheduling information for the local station, and according to the input and output module 1703. Before performing the uplink or downlink data transmission on the downlink PPDU or the scheduling information for the local station included in the triggering frame, the following operations may also be performed:
  • the uplink/downlink data transmission is performed by the input/output module 1703 according to the scheduling information included in the downlink PPDU or the trigger frame.
  • the processor 1701 invokes the program code stored in the memory 1702 to detect the second signal detection energy of the currently successful contention channel, including:
  • the station shown in FIG. 17 only indicates components required for performing the channel contention method provided by the embodiment of the present invention, and the present invention implements other components such as physical buttons, power supplies, and casings that the site can have.
  • the examples are not labeled as this does not affect the implementation of the embodiments of the present invention.
  • the disclosed apparatus and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, or an electrical, mechanical or other form of connection.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiments of the present invention.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit. Specifically, it can be implemented by means of software and necessary general hardware.
  • the general-purpose hardware includes a general-purpose integrated circuit, a general-purpose CPU, a general-purpose memory, a general-purpose component, and the like, and of course, the dedicated hardware includes an application-specific integrated circuit, a dedicated CPU, and a dedicated memory. , special components, etc. to achieve.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • the technical solution of the present invention contributes in essence or to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium.
  • a number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (English: Read-Only Memory, abbreviated as ROM), and a random storage Take a memory (English: Random Access Memory, RAM for short), a disk or an optical disc, and other media that can store program code.

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Abstract

一种信道竞争方法及相关装置,该方法包括:接入点判断在当前信道上是否解析出本基本服务集BSS的任一站点发送的信道竞争包;若是,所述接入点确定本BSS竞争所述当前信道成功;利用所述竞争成功的当前信道向所述本BSS广播下行物理层协议数据单元PPDU或触发帧,所述下行PPDU或触发帧中包括针对所述本BSS的多个站点的上行或者下行调度信息。实施上述技术方案可以提高AP的信道竞争成功率。

Description

一种信道竞争方法及相关装置 技术领域
本发明涉及通信技术领域,尤其涉及一种信道竞争方法及相关装置。
背景技术
基于802.11ac的无线局域网(wireless local area network,WLAN)系统简称为802.11ac系统,802.11ac系统采用正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)调制方式。在802.11ac系统中,可以包括多个基本服务集(Basic Service Set,BSS),每个BSS中可以包括一个接入点(Access Point,AP)以及一个与该AP关联的站点(Station,STA),AP或STA在需要进行数据传输时,可以检测当前信道的信号检测能量,若该信号检测能量小于空闲信道评估(Clear Channel Assessment,CCA)门限,则进行信道竞争,并在信道竞争成功时进行数据传输;其中,信号检测能量越小,表明当前信道越空闲。
随着无线局域网的应用广泛,其组网覆盖已逐渐由办公或家庭局域网等用户较少的场景,演变为会展中心、体育场馆以及机场、高校区等用户密集场景,而传统的802.11ac系统已无法满足该类型场景中用户对无线速度和网络性能的需求。为了向用户提供更好地无线速度和网络性能,802.11ax系统应运而生。802.11ax系统采用正交频分多址(Orthogonal Frequency Division Multiple Access,OFDMA)调制方式。在802.11ax系统中,每个BSS中可以包括一个AP以及多个与该AP关联的STA,AP对STA进行时频资源调度之后,STA才能进行上行数据传输。在实践中发现,AP需要成功竞争到信道才能对STA进行时频资源调度,若AP竞争信道失败,则无法对STA进行时频资源调度,从而影响STA的上行数据传输。
发明内容
本发明实施例提供了一种信道竞争方法及相关装置,能够提高AP的信道 竞争成功概率。
第一方面提供了一种信道竞争方法,包括:
接入点判断在当前信道上是否解析出本基本服务集BSS的任一站点发送的信道竞争包;若是,所述接入点确定本BSS竞争所述当前信道成功;
利用所述竞争成功的当前信道向所述本BSS广播下行物理层协议数据单元PPDU或触发帧,所述下行PPDU或触发帧中包括针对所述本BSS的多个站点的上行或者下行调度信息。
结合第一方面,在第一方面的第一种可能的实现方式中,确定所述本BSS竞争所述当前信道成功之后,以及利用所述竞争成功的当前信道向所述本BSS广播下行PPDU或触发帧之前,还包括:
记录在预设时间段内解析出在所述竞争成功的当前信道发送信道竞争包的所述本BSS的多个站点的标识;
所述利用所述竞争成功的当前信道向所述本BSS广播下行PPDU或触发帧,包括:
确定所述多个站点的标识对应的多个站点的调度信息;
生成下行PPDU或触发帧,所述下行PPDU或触发帧包括所述多个站点的调度信息;
利用所述竞争成功的当前信道向所述本BSS广播包括所述多个站点的调度信息的下行PPDU或触发帧。
结合第一方面或第一方面的第一种可能的实现方式,在第一方面的第二种可能的实现方式中,确定所述本BSS竞争所述当前信道成功之后,以及利用所述竞争成功的当前信道向所述本BSS广播下行PPDU或触发帧之前,还包括:
统计在预设时间段内解析出的本BSS的站点在所述竞争成功的当前信道发送的信道竞争包;该信道竞争包中包括对应的站点检测到的所述竞争成功的当前信道的信道状态信息;
所述利用所述竞争成功的当前信道向所述本BSS广播下行PPDU或触发帧,包括:
根据解析出的信道竞争包中包括的信道状态信息确定待调度的多个站点;
生成下行PPDU或触发帧,该下行PPDU或触发帧包括所述待调度的多个 站点的调度信息;
利用所述竞争成功的当前信道向所述本BSS广播包括所述待调度的多个站点的调度信息的下行PPDU或触发帧。
结合第一方面、第一方面的第一种可能的实现方式,以及第一方面的第二种可能的实现方式中的任一种实现方式,第一方面的第三种可能的实现方式中,所述信道竞争包是所述站点在需要进行数据传输,且检测到所述当前信道的信号检测能量小于第一预设门限时发送的;
所述利用所述竞争成功的当前信道向所述本BSS广播下行PPDU或触发帧之前,还包括:
检测所述竞争成功的当前信道的信号检测能量;判断检测到的所述竞争成功的当前信道的信号检测能量是否小于第二预设门限;所述第二预设门限不同于所述第一预设门限;
若小于,执行所述利用所述竞争成功的当前信道向本BSS广播下行PPDU或触发帧的步骤。
结合第一方面的第三种可能的实现方式,在第一方面的第四种可能的实现方式中,所述检测所述竞争成功的当前信道的信号检测能量,包括:
检测所述竞争成功的当前信道整个带宽的信号检测能量;或,
检测所述竞争成功的当前信道各子带的信号检测能量。
结合第一方面的第四种可能的实现方式,在第一方面的第五种可能的实现方式中,当检测所述竞争成功的当前信道各子带的信号检测能量时,所述判断检测到的所述竞争成功的当前信道的信号检测能量是否小于第二预设门限包括:
判断所述竞争成功的当前信道任一子带的信号检测能量是否小于第二预设门限,若是,则确定检测到的所述竞争成功的当前信道的信号检测能量小于第二预设门限,若否,则确定检测到的所述竞争成功的当前信道的信号检测能量大于或等于第二预设门限。
第二方面提供了另一种信道竞争方法,包括:
当本基本服务集BSS中的任一站点需要进行数据传输,且未在当前信道解析出本BSS的接入点AP发送的信道竞争包时,在所述当前信道发送信道竞争包,以使所述本BSS的AP在所述当前信道解析出所述信道竞争包时,确定 本BSS竞争所述当前信道成功;
在所述竞争成功的当前信道接收所述本BSS的AP发送的下行物理层协议数据单元PPDU或触发帧;
判断所述下行PPDU或触发帧中是否包括针对本站点的调度信息;
若是,根据所述下行PPDU或触发帧中包括的所述针对本站点的调度信息进行上行或者下行数据传输。
结合第二方面,在第二方面的第一种可能的实现方式中,所述信道竞争包中包括所述当前信道的信道状态信息,以使本BSS的AP根据该信道状态信息确定待调度的目标站点。
结合第二方面或第二方面的第一种可能的实现方式,在第二方面的第二种可能的实现方式中,在所述当前信道发送信道竞争包之前包括:
检测所述当前信道的第一信号检测能量;
判断所述第一信号检测能量是否小于第一预设门限;若是,执行在所述当前信道发送信道竞争包的步骤;
若所述下行PPDU或触发帧中包括针对本站点的调度信息,所述根据所述下行PPDU或触发帧中包括的针对本站点的调度信息进行上行或者下行数据传输之前,还包括:
检测所述竞争成功的当前信道的第二信号检测能量;判断所述第二信号检测能量是否小于第二预设门限;所述第二预设门限不同于所述第一预设门限;
若小于,执行根据所述下行PPDU或触发帧中包括的针对本站点的调度信息进行上行或者下行数据传输的步骤。
结合第二方面的第二种可能的实现方式,在第二方面的第三种可能的实现方式中,所述检测所述竞争成功的当前信道的第二信号检测能量,包括:
检测所述竞争成功的当前信道整个带宽的第二信号检测能量;或,
检测所述竞争成功的当前信道中的所述PPDU或触发帧中包括的针对本站点的调度信息指示的子带的第二信号检测能量。
第三方面提供了提供了另一种信道竞争方法,包括:
当接入点需要进行数据传输,且未在当前信道解析出本基本服务集BSS的任一站点发送的信道竞争包时,在所述当前信道发送信道竞争包,以进行信道竞争;
当确定竞争所述当前信道成功后,根据所述本BSS的任一站点发送的响应帧的接收情况,利用所述竞争成功的当前信道向所述本BSS广播下行物理层协议数据单元PPDU或触发帧,所述下行PPDU或触发帧中包括针对本BSS的多个站点的调度信息。
结合第三方面,在第三方面的第一种可能的实现方式中,所述根据所述本BSS的任一站点发送的响应帧的接收情况发送所述下行PPDU或触发帧,包括:
判断是否在所述竞争成功的当前信道接收到所述本BSS的任一站点发送的响应帧;
若是,利用所述竞争成功的当前信道向本BSS广播下行PPDU或触发帧。
结合第三方面,在第三方面的第二种可能的实现方式中,所述根据所述本BSS的任一站点发送的响应帧的接收情况发送所述下行PPDU或触发帧,包括:
判断是否在所述竞争成功的当前信道接收到所述本BSS的任一站点发送的响应帧;所述响应帧中包括对应的站点检测到的所述竞争成功的当前信道的信道状态信息以及该站点的标识;
若在所述竞争成功的当前信道接收到本BSS的站点发送的响应帧,根据所述响应帧中包括的信道状态信息以及站点的标识确定待调度的多个站点;
生成下行PPDU或触发帧,所述下行PPDU或触发帧包括所述待调度的多个站点的调度信息;
利用所述竞争成功的当前信道向所述本BSS广播包括所述待调度的多个站点的调度信息的下行PPDU或触发帧。
结合第三方面、第三方面的第一种可能的实现方式,以及第三方面的第二种可能的实现方式中的任一种实现方式,在第三方面的第三种可能的实现方式中,在所述当前信道发送信道竞争包之前包括:检测所述当前信道的第一信号检测能量;判断所述第一信号检测能量是否小于第一预设门限;若是,执行在所述当前信道发送信道竞争包的步骤;
所述响应帧为所述本BSS的站点在所述当前信道解析出本BSS的AP发送的信道竞争包,且检测到所述当前信道的信号检测能量小于第一预设门限时,利用所述当前信道向所述本BSS的AP发送的;
所述利用所述竞争成功的当前信道向所述本BSS广播下行PPDU或触发帧之前,还包括:
检测所述当前信道的第二信号检测能量;判断所述第二信号检测能量是否小于第二预设门限;所述第二预设门限不同于所述第一预设门限;
若所述第二信号检测能量小于第二预设门限,执行利用所述竞争成功的当前信道向所述本BSS广播下行PPDU或触发帧的步骤。
第四方面提供了另一种信道竞争方法,包括:
基本服务集BSS中的任一站点判断是否在当前信道解析出本BSS的接入点AP发送的信道竞争包;若是,确定所述本BSS竞争所述当前信道成功;
在所述竞争成功的当前信道向所述本BSS的AP发送响应帧,以使所述本BSS的AP在接收到所述响应帧时,利用所述竞争成功的当前信道向所述本BSS广播下行PPDU或触发帧;
在所述竞争成功的当前信道接收所述本BSS的AP发送的下行物理层协议数据单元PPDU;
判断所述下行PPDU或触发帧中是否包括针对本站点的调度信息;
若是,根据所述下行PPDU或触发帧中包括的所述针对本站点的调度信息进行上行或者下行数据传输。
结合第四方面,在第四方面的第一种可能的实现方式中,所述确定所述本BSS竞争所述当前信道成功之后,以及所述在所述竞争成功的当前信道向所述本BSS的AP发送响应帧之前,还包括:
检测所述当前信道的第一信号检测能量;
判断所述第一信号检测能量是否小于所述第一预设门限;
若是,执行所述在所述竞争成功的当前信道向所述本BSS的AP发送响应帧的步骤。
结合第四方面,在第四方面的第二种可能的实现方式中,所述确定所述本BSS竞争所述当前信道成功之后,以及所述在所述竞争成功的当前信道向所述本BSS的AP发送响应帧之前,还包括:
检测所述当前信道的第一信号检测能量;
判断所述第一信号检测能量是否小于所述第一预设门限;
若是,执行所述在所述竞争成功的当前信道向所述本BSS的AP发送响应 帧的步骤;
所述在所述竞争成功的当前信道向所述本BSS的AP发送响应帧,包括:
从所述竞争成功的当前信道中随机选择一个子信道,并利用所述子信道向所述本BSS的AP发送所述响应帧,所述响应帧中包括本站点检测到的所述竞争成功的当前信道的信道状态信息,以及本站点的标识,以使所述本BSS的AP根据接收到的所述响应帧中包括的信道状态信息,以及站点的标识确定待调度的站点。
结合第四方面的第一种可能的实现方式或第四方面的第二种可能的实现方式,在第四方面的第三种可能的实现方式中,判断所述下行PPDU或触发帧中包括针对本站点的调度信息之后,以及所述根据所述下行PPDU或触发帧中包括的所述针对本站点的调度信息进行上行或者下行数据传输之前,还包括:
检测所述竞争成功的当前信道的第二信号检测能量;
判断所述第二信号检测能量是否小于第二预设门限;所述第二预设门限不同于所述第一预设门限;
若小于,执行根据所述下行PPDU或触发帧中包括的调度信息进行上行或者下行数据传输。
结合第四方面的第三种可能的实现方式,在第四方面的第四种可能的实现方式中,所述检测所述竞争成功的当前信道的第二信号检测能量,包括:
检测所述竞争成功的当前信道整个带宽的第二信号检测能量;或,
检测所述竞争成功的当前信道中所述PPDU或触发帧中包括的所述针对本站点的调度信息指示的子带的第二信号检测能量。
第五方面提供了一种通信装置,所述通信装置为接入点AP或者应用于接入点AP中的处理器,包括:
信道竞争模块,用于判断在当前信道上是否解析出本基本服务集BSS的任一站点发送的信道竞争包;若是,确定本BSS竞争所述当前信道成功;
数据传输模块,用于利用所述竞争成功的当前信道向所述本BSS广播下行物理层协议数据单元PPDU或触发帧,所述下行PPDU或触发帧中包括针对所述本BSS的多个站点的上行或者下行调度信息。
结合第五方面,在第五方面的第一种可能的实现方式中,所述信道竞争模块,还用于确定本BSS竞争所述当前信道成功之后,记录在预设时间段内解 析出在所述竞争成功的当前信道发送信道竞争包的所述本BSS的多个站点的标识;
所述数据传输模块,还用于确定所述多个站点的标识对应的多个站点的调度信息;生成下行PPDU或触发帧,所述下行PPDU或触发帧包括所述多个站点的调度信息;利用所述竞争成功的当前信道向所述本BSS广播包括所述多个站点的调度信息的下行PPDU或触发帧。
结合第五方面或第五方面的第一种可能的实现方式,在第五方面的第二种可能的实现方式中,所述信道竞争模块,还用于确定本BSS竞争所述当前信道成功之后,统计在预设时间段内解析出的本BSS的站点在所述竞争成功的当前信道发送的信道竞争包;该信道竞争包中包括对应的站点检测到的所述竞争成功的当前信道的信道状态信息;
所述数据传输模块,还用于根据解析出的信道竞争包中包括的信道状态信息确定待调度的多个站点;生成包括所述待调度的多个站点的调度信息的下行PPDU或触发帧;利用所述竞争成功的当前信道向所述本BSS广播包括所述待调度的多个站点的调度信息的下行PPDU或触发帧。
结合第五方面、第五方面的第一种可能的实现方式,以及第五方面的第二种可能的实现方式,在第五方面的第三种可能的实现方式中,所述信道竞争包是所述站点在需要进行数据传输,且检测到所述当前信道的信号检测能量小于第一预设门限时发送的;
所述通信装置还包括:
信号检测模块,用于检测所述竞争成功的当前信道的信号检测能量;
所述数据传输模块,还用于当所述信号检测模块检测到的所述竞争成功的当前信道的信号检测能量第二预设门限时,利用所述竞争成功的当前信道向本BSS广播下行PPDU或触发帧;所述第二预设门限不同于所述第一预设门限。
结合第五方面的第三种可能的实现方式,在第五方面的第四种可能的实现方式中,当所述信号检测模块检测所述竞争成功的当前信道各子带的信号检测能量时,
所述数据传输模块,具体用于当所述竞争成功的当前信道任一子带的信号检测能量小于第二预设门限时,确定检测到的所述当前信道的信号检测能量小于第二预设门限,否则,确定检测到的所述当前信道的信号检测能量大于或等 于第二预设门限。
第六方面提供了另一种通信装置,所述通信装置为站点或者应用于站点中的处理器,包括:
信道竞争模块,用于当所述站点需要进行数据传输,且未在当前信道解析出本基本服务集BSS的接入点AP发送的信道竞争包时,在所述当前信道发送信道竞争包,以使所述本BSS的AP在所述当前信道解析出所述信道竞争包时,确定本BSS竞争所述当前信道成功;
数据传输模块,用于在所述竞争成功的当前信道接收所述本BSS的AP发送的下行物理层协议数据单元PPDU或触发帧;当所述下行PPDU或触发帧中包括针对本站点的调度信息时,根据所述下行PPDU或触发帧中包括的所述针对本站点的调度信息进行上行或下行数据传输。
结合第六方面,在第六方面的第一种可能的实现方式中,所述信道竞争包中包括所述当前信道的信道状态信息,以使本BSS的AP根据该信道状态信息确定待调度的目标站点。
结合第六方面或第六方面的第一种可能的实现方式,在第六方面的第二种可能的实现方式中,所述通信装置还包括:
信号检测模块,用于检测所述当前信道的第一信号检测能量;
所述信道竞争模块,具体用于当所述信号检测模块检测到的第一信号检测能量小于第一预设门限时,在所述当前信道发送信道竞争包;
所述信号检测模块,还用于若所述下行PPDU或触发帧中包括针对本站点的调度信息,检测所述竞争成功的当前信道的第二信号检测能量;
所述数据传输模块,具体用于当所述信号检测模块检测到的第二信号检测能量小于第二预设门限时,根据所述下行PPDU或触发帧中包括的针对本站点的调度信息进行上行或下行数据传输;所述第二预设门限不同于所述第一预设门限。
第七方面提供了另一种通信装置,所述通信装置为接入点AP或者应用于接入点AP中的处理器,包括:
信道竞争模块,用于当所述AP需要进行数据传输,且未在当前信道解析出本基本服务集BSS的任一站点发送的信道竞争包时,在所述当前信道发送信道竞争包,以进行信道竞争;
数据传输模块,用于当确定竞争所述当前信道成功后,根据所述本BSS的任一站点发送的响应帧的接收情况,利用所述竞争成功的当前信道向所述本BSS广播下行物理层协议数据单元PPDU或触发帧,所述下行PPDU或触发帧中包括针对本BSS的多个站点的调度信息。
结合第七方面,在第七方面的第一种可能的实现方式中,所述数据传输模块,具体用于当在所述竞争成功的当前信道接收到所述本BSS的任一站点发送的响应帧时,利用所述竞争成功的当前信道向本BSS广播所述下行PPDU或触发帧。
结合第七方面,在第七方面的第二种可能的实现方式中,所述数据传输模块,具体用于当在所述竞争成功的当前信道接收到所述本BSS的站点发送的响应帧时,所述响应帧中包括对应的站点检测到的所述竞争成功的当前信道的信道状态信息以及该站点的标识,根据所述响应帧中包括的信道状态信息以及站点的标识确定待调度的多个站点;生成包括所述待调度的多个站点的调度信息的下行PPDU或触发帧;利用所述竞争成功的当前信道向所述本BSS广播包括所述待调度的多个站点的调度信息的下行PPDU或触发帧。
结合第七方面、第七方面的第一种可能的实现方式,以及第七方面的第二种可能的实现方式,在第七方面的第三种可能的实现方式中,所述通信装置还包括:
信号检测模块,用于检测所述当前信道的第一信号检测能量;
所述信道竞争模块,具体用于当所述信号检测模块检测到的第一信号检测能量小于第一预设门限时,在所述当前信道发送信道竞争包;
所述响应帧为所述本BSS的站点在所述当前信道解析出本BSS的AP发送的信道竞争包,且检测到所述当前信道的信号检测能量小于第一预设门限时,利用所述当前信道向所述本BSS的AP发送的;
所述信号检测模块,还用于检测所述信道的第二信号检测能量;
所述数据传输模块,具体用于当所述信号检测模块检测到的第二信号检测能量小于第二预设门限时,利用所述竞争成功的当前信道向所述本BSS广播下行PPDU或触发帧;所述第二预设门限不同于所述第一预设门限。
第八方面提供了另一种通信装置,所述通信装置为站点或者应用于站点中的处理器,包括:
信道竞争模块,用于判断是否在当前信道解析出本BSS的接入点AP发送的信道竞争包;若是,确定所述本BSS竞争所述当前信道成功;
数据传输模块,用于在所述竞争成功的当前信道向所述本BSS的AP发送响应帧,以使所述本BSS的AP在接收到所述响应帧时,利用所述竞争成功的当前信道向所述本BSS广播下行PPDU或触发帧;在所述竞争成功的当前信道接收所述本BSS的AP发送的下行物理层协议数据单元PPDU;当下行PPDU或触发帧中包括针对本站点的调度信息时,根据所述下行PPDU或触发帧中包括的所述针对本站点的调度信息进行上行或者下行数据传输。
结合第八方面,在第八方面的第一种可能的实现方式中,所述通信装置还包括:
信号检测模块,用于检测所述当前信道的第一信号检测能量;
所述数据传输模块,具体用于当所述信号检测模块检测到的第一信号检测能量小于第一预设门限时,在所述竞争成功的当前信道向所述本BSS的AP发送响应帧;或者,当所述信号检测模块检测到第一信号检测能量小于第一信号检测能量时,从所述竞争成功的当前信道中随机选择一个子信道,并利用所述子信道向所述本BSS的AP发送所述响应帧,所述响应帧中包括本站点检测到的所述竞争成功的当前信道的信道状态信息,以及本站点的标识,以使所述本BSS的AP根据接收到的所述响应帧中包括的信道状态信息,以及站点的标识确定待调度的站点。
结合第八方面的第一种可能的实现方式,在第八方面的第二种可能的实现方式中,所述信号检测模块,还用于当所述下行PPDU或触发帧中包括针对本站点的调度信息之后,检测所述竞争成功的当前信道的第二信号检测能量;
所述数据传输模块,还用于当所述信号检测模块检测到的第二信号检测能量小于第二预设门限时,根据所述下行PPDU或触发帧中包括的调度信息进行上行或者下行数据传输;所述第二预设门限不同于所述第一预设门限。
与现有技术相比,本发明实施例具有以下有益效果:
本发明实施例中,AP判断在当前信道解析出本BSS的任一站点发送的信道竞争包时,可以确定本BSS竞争该当前信道成功,或者,AP需要进行数据传输时,且AP未在当前信道解析出本BSS的站点发送的信道竞争包时,可以在该当前信道发送信道竞争包,以进行信道竞争,由于BSS中AP或任一站点 竞争当前信道成功时,该BSS的AP均可以确定本BSS竞争该当前信道成功,并可以利用该竞争成功的当前信道对本BSS的站点进行调度,因而,可以提高AP的信道竞争成功概率。
附图说明
为了更清楚地说明本发明实施例中的技术方案,下面将对实施例中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1为本发明实施例提供的一种信道竞争的系统架构示意图;
图2为本发明实施例提供的一种信道竞争方法的流程示意图;
图3为本发明实施例提供的另一种信道竞争方法的流程示意图;
图4为本发明实施例提供的另一种信道竞争方法的流程示意图;
图5为本发明实施例提供的一种信道竞争方法的流程示意图;
图6为本发明实施例提供的一种信道竞争方法的流程示意图;
图7为本发明实施例提供的一种信道竞争方法的流程示意图;
图8为本发明实施例提供的另一种信道竞争方法的流程示意图;
图9为本发明实施例提供的另一种信道竞争方法的流程示意图;
图10为本发明实施例提供的一种通信装置的结构示意图;
图11为本发明实施例提供的一种AP的结构示意图;
图12为本发明实施例提供的一种通信装置的结构示意图;
图13为本发明实施例提供的一种站点的结构示意图;
图14为本发明实施例提供的一种通信装置的结构示意图;
图15为本发明实施例提供的一种AP的结构示意图;
图16为本发明实施例提供的一种通信装置的结构示意图;
图17为本发明实施例提供的一种站点的结构示意图。
具体实施方式
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,所描述的实施例仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
为了更好理解本发明实施例提供的一种信道竞争方法及相关装置,下面先对本发明实施例适用的系统构架进行描述。
请参阅图1,图1为本发明实施例提供的一种信道竞争的系统架构示意图。如图1所示,本发明实施例提供的技术方案可以适用于包括多个BSS,每个BSS中可以包括一个AP以及多个与该AP关联的站点(STA)的系统中,如802.11ax系统。在图1所示的系统架构中,AP对站点进行时频资源调度之后,站点才能进行上行数据传输。在图1所示的系统架构中,当某个BSS中的站点或AP竞争信道成功时,均意味着该BSS竞争信道成功,该BSS中的AP均具有该信道的使用权;其中,当AP首先竞争信道成功时,可使用该信道进行数据传输;当AP确定本BSS的站点竞争信道成功时,AP无需再去竞争信道,可以直接使用站点竞争到的信道进行数据传输。
基于图1所示的系统架构,本发明实施例提供了一种信道竞争方法,如图2所示,为本发明实施例提供的一种信道竞争方法的流程示意图,可以包括以下步骤:
需要说明的是,步骤201至步骤203的执行主体为上述系统架构中的AP或AP中的处理器,如CPU(英文全称:Center Process Unit)。为了便于描述,以下以步骤201至步骤203的执行主体为上述系统架构中的AP为例进行描述。
步骤201、判断在当前信道是否解析出本BSS的任一站点发送的信道竞争包。若是,转至步骤202;否则,结束当前流程。
步骤202、确定本BSS竞争该当前信道成功。
本发明实施例中,考虑到在802.11ax系统中,每个BSS中会包括多个与该BSS的AP关联的站点,且AP对站点进行时频资源调度之后,站点才能进行上行数据传输,而AP需要成功竞争到信道才能对站点进行时频资源调度,若AP竞争信道失败,则无法对站点进行时频资源调度,从而影响站点的上行数据传输,因此,为了提高802.11ax系统中的数据传输效率,需要提高AP抢占信道的成功率。
为了达到上述目的,在本发明实施例中,BSS中的站点竞争信道成功时,会将信道使用权转交给AP,即同一BSS中,站点可以帮助AP抢占信道,以提高AP抢占信道的成功率。
本发明实施例中,BSS中任一站点在需要进行数据传输时,可以通过检测当前信道的信号检测能量的方式确定是否参与信道竞争,并当检测到的信号检测能量低于预设门限(第一预设门限)时,站点可以发送信道竞争包,以进行信道竞争。当AP在当前信道解析出本BSS的站点发送的信道竞争包时,确定竞争当前信道成功。信道竞争包可以是RTS、RTX或新定义的控制帧或管理帧。
需要注意的是,本发明实施例中,当AP未在当前信道解析出本BSS的站点发送的信道竞争包时,AP可以通过信道空闲评估确定是否参与信道竞争,即检测当前信道的信号检测能量,并根据该信号检测能量是否小于预设门限确定是否发送信道竞争包参与信道竞争,本发明实施例对此不做限定。
步骤203、利用该竞争成功的当前信道向本BSS广播下行PPDU或触发帧,该下行PPDU中包括针对本BSS的多个站点的上行或者下行调度信息。
具体的本发明实施例中,AP确定本BSS竞争当前信道成功之后,AP可以通过预设的调度策略确定待调度的站点(本BSS的站点),并在该竞争成功的当前信道向本BSS的站点发送下行PPDU(Physical Protocol Data Unit,物理层协议数据单元)或触发帧(Trigger frame),该下行PPDU或触发帧中可以包括针对上述需要调度的站点的上行或者下行调度信息。本BSS的站点接收到AP发送的下行PPDU或触发帧之后,对该下行PPDU或触发帧进行解析,获取其中包括的调度信息,根据对应的调度信息进行上行和/或或者下行数据传输。其中,该触发帧可以是新定义的控制帧或管理帧。
例如,AP可以在下行PPDU的SIG域中携带针对待调度的站点的上行或者下行调度信息,该调度信息可以指示AP为对应的站点分配的时频资源,从而,对应的站点可以根据该时频资源确定接收AP发送的下行数据的时间和频域,或者,进行上行数据传输的时间和频域。
进一步地,在一种可选的实施方式中,竞争当前信道成功之后,利用该当前信道向本BSS广播下行PPDU或触发帧之前,还可以包括以下步骤:
11)、检测该竞争成功的当前信道的信号检测能量;
12)、判断检测到的该竞争成功的当前信道的信号检测能量是否小于第二预设门限;
13)、若小于,执行在该竞争成功的当前信道向本BSS的站点发送下行PPDU或触发帧的步骤。
为了进一步提高系统的数据传输性能,本发明实施例中,针对信道竞争阶段和数据传输阶段设置不同的CCA门限:在信道竞争阶段,可以通过判断检测到的信号检测能量是否小于第一预设门限确定是否进行信道竞争;在数据传输阶段,通过判断检测到的信号检测能量是否小于第二预设门限确定是否进行数据传输。其中,第一预设门限和第二预设门限可以根据具体场景设定,如第一预设门限为-82dbm,第二预设门限为-62dbm;优选地,第一预设门限大于第二预设门限。
相应地,基于上述设置,AP确定本BSS竞争当前信道成功之后,在进行数据传输之前,可以先检测该竞争成功的当前信道的信号检测能量,并判断检测到的该竞争成功的当前信道的信号检测能量是否小于第二预设门限,以确定是否进行数据传输。当AP判断检测到的当前信道的信号检测能量小于第二预设门限时,AP可以在当前信道向本BSS的站点发送下行PPDU或触发帧。
本发明实施例中,在数据传输阶段,AP检测当前信道的信号检测能量时,可以检测当前信道整个带宽的信号检测能量,也可以检测当前信道各子带的信号检测能量。
其中,当检测当前信道的信号检测能量为检测各子带的信号检测能量时,若任一子带的信号检测能量小于第二预设门限,AP均执行向本BSS的站点发送下行PPDU的步骤。
应该认识到,检测当前信道的信号检测能量为检测整个带宽的信号检测能量时,以及检测当前信道的信号检测能量为检测各子带的信号检测能量时,对应的第二预设门限可以不同。
举例来说,假设当前信道的带宽为20MHz,共包括8个子带,若在整个带宽上的信道空闲评估的门限(第二预设门限)为CCAdata,则每个子带上的信道空闲评估的门限可以为1/8*CCAdata。
可见,在图2所描述的方法流程中,BSS中的站点竞争信道成功后,会将信道使用权转交给本BSS中的AP,从而提高了AP竞争信道成功的概率,进而,提高了系统的数据传输性能。
本领域技术人员可以理解,上述信道竞争阶段的第一预设门限与数据传输阶段设置的第二预设门限可以不同。一般的,第一预设门限小于第二预设门限。通过针对信道竞争和数据传输阶段设置不同的CCA门限,在竞争阶段AP/STA或站点可通过判断信道检测能量与门限CCAcc的关系决定是否竞争信道;在数据阶段AP/或站点STA判断信号检测能量与门限CCAdata的关系决定是否进行OFDMA数据传输。通过这种方式,在竞争阶段保持原有的CCA门限可保证接入信道的公平性,而在数据阶段AP/或站点STA可通过提高CCA门限提升并发传输数据的能力。
基于图1所示的系统架构,本发明实施例提供了另一种信道竞争方法,如图3所示,为本发明实施例提供的另一种信道竞争方法的流程示意图,可以包括以下步骤:
需要说明的是,步骤301至步骤306的执行主体为上述系统架构中的AP或AP中的处理器,如CPU。为了便于描述,以下以步骤301至步骤306的执行主体为上述系统架构中的AP为例进行描述。
步骤301、判断是否在当前信道解析出本BSS的任一站点发送的信道竞争包。若是,转至步骤S302;否则,结束当前流程。
步骤302、确定本BSS竞争该当前信道成功。
其中,步骤301~步骤302的具体实现可以参见上述步骤201~步骤202中的相关描述,本发明实施例在此不再赘述。
步骤303、记录在预设时间段内解析出在该竞争成功的当前信道发送信道竞争包的本BSS的多个站点的标识。
本发明实施例中,可以预先设置一个时间段(该时间段可以根据具体场景设定,以下描述为T),在该预设时间段T内,各BSS中,AP和其关联的站点均可以进行空闲信道评估,即检测当前信道的信号检测能 量是否小于预设门限,并当检测到当前信道的信号检测能量小于预设门限(第一预设门限)时,发送信道竞争包,以进行信道竞争。当AP接收到本BSS的站点发送的信道竞争包时,AP确定本BSS竞争当前信道成功,同时,AP可以统计在预设时间段T内解析出的本BSS的站点在该竞争成功的当前信道发送的信道竞争包,并记录在预设时间段T内解析出在该竞争成功的当前信道发送信道竞争包的本BSS的多个站点的标识。
步骤304、确定该多个站点的标识对应的多个站点的调度信息。
步骤305、生成下行PPDU或触发帧,该下行PPDU或触发帧包括该多个站点的调度信息。
本发明实施例中,可以将在上述预设时间段T内解析出的在该竞争成功的当前信道发送信道竞争包的本BSS的多个站点的标识对应的多个站点确定为待调度的多个站点。
相应地,AP记录在预设时间段内解析出在该当前信道发送信道竞争包的本BSS的多个站点的调度信息之后的多个站点的标识之后,可以根据该在预设时间段内解析出的在该当前信道发送信道竞争包的本BSS的多个站点的标识,确定该多个站点的调度信息,并生成包括将该多个站点的调度信息添加至的下行PPDU或触发帧。例如,AP可以将该多个站点的调度信息添加至下行PPDU的SIG域中。
步骤306、利用该竞争成功的当前信道向本BSS广播包括该多个站点的调度信息的下行PPDU或触发帧。
本发明实施例中,AP生成包括将多个站点的调度信息添加至的下行PPDU或触发帧之后,可以利用该当前信道将向本BSS广播包括该多个站点的调度信息(上行或者下行调度信息)的下行PPDU或触发帧。本BSS的站点接收到AP发送的下行PPDU或触发帧之后,对该下行PPDU进行解析,获取其中包括的调度信息,根据对应的调度信息进行上行和/或或者下行数据传输。
需要注意的是,在本发明实施例中,上述步骤305与步骤306之间,还可以包括上述步骤11)~步骤13),其具体实现可以参见图2所描述的方法流程中的相关描述,本发明实施例在此不再赘述。
基于图1所示的系统架构,本发明实施例提供了另一种信道竞争方法,如图4所示,为本发明实施例提供的另一种信道竞争方法的流程示意图,可以包括以下步骤:
需要说明的是,步骤401至步骤406的执行主体为上述系统架构中的AP或AP中的处理器,如CPU。为了便于描述,以下以步骤401至步骤406的执行主体为上述系统架构中的AP为例进行描述。
步骤401、判断是否在当前信道解析出本BSS的任一站点发送的信道竞争包。若是,转至步骤S402;否则,结束当前流程。
步骤402、确定本BSS竞争该当前信道成功。
其中,步骤401~步骤402的具体实现可以参见上述步骤201~步骤202中的相关描述,本发明实施例在此不再赘述。
步骤403、统计在预设时间段内解析出的本BSS的站点在该竞争成功的当前信道发送的信道竞争包,该信道竞争包中包括对应的站点检测到的该竞争成功的当前信道的信道状态信息。
本发明实施例中,可以预先设置一个时间段(该时间段可以根据具体场景设定,以下描述为T),在该预设时间段T内,各BSS中,AP和其关联的站点均可以进行空闲信道评估,即检测当前信道的信号检测能量是否小于预设门限,并当检测到当前信道的信号检测能量小于预设门限(第一预设门限)时,发送信道竞争包,以进行信道竞争;其中,该信道竞争包中还可以包括站点检测到的当前信道的信道状态信息,如历史SNR(SIGNAL-NOISE RATIO,信噪比)、瞬时干扰强度等。当AP接收到本BSS的站点发送的信道竞争包时,AP确定本BSS竞争当前信道成功,同时,AP可以统计在预设时间段T内解析出的本BSS的站点发送的信道竞争包。
步骤404、根据解析出的信道竞争包中包括的信道状态信息确定待调度的多个站点。
步骤405、生成下行PPDU或触发帧,该下行PPDU或触发帧包括该待调度的多个站点的调度信息。
本发明实施例中,AP可以根据上述预设时间段T内解析出的本BSS 的站点在该竞争成功的当前信道发送的信道竞争包中包括的信道状态信息确定待调度的多个站点。
举例来说,假设信道竞争包中包括的信道状态信息为历史SNR,则AP可以根据在预设时间段T内解析出的本BSS的站点在该竞争成功的当前信道发送的信道竞争包中的信道状态信息,将包括的历史SNR大于预设阈值的信道竞争包对应的本BSS的站点确定为待调度的站点。
又举例来说,假设信道竞争包中包括的信道状态信息为瞬时干扰强度,则AP可以根据在预设时间段T内解析出的本BSS的站点在该竞争成功的当前信道发生的信道竞争包中的信道状态信息,将包括的瞬时干扰强度小于预设阈值的信道竞争包对应的本BSS的站点确定为调度的站点。
本发明实施例中,AP根据解析出的信道竞争包中包括的信道状态信息确定待调度的多个站点之后,可以生成包括该待调度的多个站点的调度信息的下行PPDU或触发帧。例如,AP可以将该待调度的多个站点的调度信息添加至下行PPDU的SIG域中。
步骤406、利用竞争成功的当前信道向本BSS广播包括该待调度的多个站点的调度信息的下行PPDU或触发帧。
本发明实施例中,AP生成包括将待调度的多个站点的调度信息添加至的下行PPDU或触发帧之后,可以利用该竞争成功的当前信道将向本BSS广播包括该待调度的多个站点的调度信息的下行PPDU或触发帧。本BSS的站点接收到AP发送的下行PPDU或触发帧之后,对该下行PPDU或触发帧进行解析,获取其中包括的调度信息,根据对应的调度信息进行上行和/或或者下行数据传输。
需要注意的是,在本发明实施例中,上述步骤405与步骤406之间,还可以包括上述步骤11)~步骤13),其具体实现可以参见图2所描述的方法流程中的相关描述,本发明实施例在此不再赘述。
可见,在图3和图4所描述的方法流程中,一方面,BSS中的站点竞争信道成功后,会将信道使用权转交给本BSS中的AP,从而提高了AP竞争信道成功的概率,进而,提高了系统的数据传输性能;另一方面,AP对本BSS的站点进行调度时,可以根据预设时间段内解析出的本BSS 的站点发送的信道竞争包,或信道竞争包中包括的信道状态信息确定待调度的站点,对当前信道空闲状态更好地,或信道状态更优的站点进行调度,进一步提高了系统的数据传输性能。
基于图1所示的系统架构,本发明实施例提供了一种信道竞争方法,如图5所示,为本发明实施例提供的一种信道竞争方法的流程示意图,可以包括以下步骤:
需要说明书的是,步骤501至步骤504的执行主体为上述系统架构中的站点或站点中的处理器,如CPU。为便于描述,以下以步骤501至步骤504的执行主体为上述系统架构中的站点为例进行描述。
步骤501、当本BSS中任一站点需要进行数据传输时,且未在当前信道解析出本BSS的AP发送的信道竞争包时,在当前信道发送信道竞争包,以使本BSS的AP在该当前信道解析出该信道竞争包时,确定本BSS竞争。
本发明实施例中,考虑到在系统中,每个BSS中会包括多个与该BSS的AP关联的站点,且AP对站点进行时频资源调度之后,站点才能进行上行数据传输,而AP需要成功竞争到信道才能对站点进行时频资源调度,若AP竞争信道失败,则无法对站点进行时频资源调度,从而影响站点的上行数据传输,因此,为了提高系统中的数据传输效率,需要提高AP抢占信道的成功率。
为了达到上述目的,在本发明实施例中,BSS中的站点竞争信道成功时,会将信道使用权转交给AP,即同一BSS中,站点可以帮助AP抢占信道,以提高AP抢占信道的成功率。
本发明实施例中,当BSS中的站点需要进行数据传输,且未在当前信道解析出本BSS的AP发送的信道竞争包时,可以发送信道竞争包进行信道竞争。
值得说明的是,在本发明实施例中,若站点在当前信道解析出本BSS的AP发送的信道竞争包,则站点可以确定本BSS的AP竞争信道成功,此时,该站点不再进行当前信道的信道竞争。
作为一种可选的实现方式,本发明实施例中,站点在发送信道竞争 包之前,可以站点检测到当前信道的信号检测能量(第一信号检测能量)之后,可以并通过判断该第一信号检测能量是否小于预设门限(第一预设门限,可以根据具体场景设置)的方式确定是否参与信道竞争。当站点判断第一信号检测能量小于第一预设门限时,站点可以确定参与信道竞争,并在当前信道发送信道竞争包。当AP在该当前信道解析出本BSS的站点发送的信道竞争包时,AP可以确定竞争当前信道成功。
需要注意的是,在本发明实施例中,当站点检测到当前信道的第一信号检测能量,且判断该第一信号检测能量等于或大于第一预设门限时,站点可以不参与当前信道的信道竞争,本发明实施例对此不做限定。
步骤502、在该竞争成功的当前信道接收本BSS的AP发送的下行PPDU或触发帧。
步骤503、判断该下行PPDU或触发帧中是否包括针对本站点的调度信息。若判断为是,转至步骤504;否则,结束当前流程。
步骤504、根据该下行PPDU或触发帧中包括的针对本站点的调度信息进行上行或者下行数据传输。
本发明实施例中,若AP在当前信道解析出本BSS的站点发送的信道竞争包,则AP确定竞争当前信道成功,进而,AP可以根据调度策略确定待调度的站点,并利用当前信道向本BSS广播包括该待调度的站点的调度信息的下行PPDU或触发帧。例如,AP可以在下行PPDU中的SIG域中包括待调度的站点的调度信息,该调度信息可以指示AP为对应的站点分配的时频资源,从而,对应的站点可以根据该时频资源确定接收AP发送的下行数据的时间和频域,或,进行上行数据传输的时间和频域。
站点接收到本BSS的AP发送的下行PPDU或触发帧之后,可以对该下行PPDU或触发帧进行解析,判断该下行PPDU或触发帧中是否包括针对本端的站点的调度信息,即针对该站点的调度信息,若该下行PPDU或触发帧中包括针对本端的站点的调度信息,则该站点可以根据该下行PPDU或触发帧中包括的针对本端的站点的调度信息进行上行和/或或者下行数据传输。
作为一种可选的实施方式,AP在当前信道中解析出本BSS的站点发送的信道竞争包,并确定本BSS竞争当前信道成功之后,AP可以记录预 设时间段内解析出在该竞争成功的当前信道发送信道竞争包的本BSS的多个站点的标识,并确定该多个站点的标识对应的多个站点的调度信息,进而,生成包括该多个站点的调度信息的下行PPDU或触发帧,并利用当前信道向本BSS广播包括该多个站点的调度信息的下行PPDU或触发帧,以使本BSS的站点在接收到该下行PPDU或触发帧之后,根据该下行PPDU或触发帧中包括的针对本端的调度信息进行上行或者下行数据传输,其具体实现可以参见上述图3所描述的方法流程中的步骤303~步骤306中的相关描述,本发明实施例在此不再赘述。
作为另一种可选的实施方式,在本发明实施例中,当站点检测到当前信道的第一信号检测能量,并判断该第一信号检测能量小于第一预设门限时,站点可以在发送的信道竞争包中包括当前信道的信道状态信息,如历史SNR、瞬时干扰强度等,以使本BSS的AP根据该信道状态信息确定待调度的站点。
相应地,AP在当前信道中解析出本BSS的站点发送的信道竞争包,并确定竞争当前信道成功之后,AP可以统计在预设时间段内解析出的本BSS的站点在该竞争成功的当前信道发送的信道竞争包,并根据该信道竞争包中包括的信道状态信息确定待调度的站点,进而,生成包括该待调度的站点的调度信息的下行PPDU或触发帧中,并利用该竞争成功的当前信道向本BSS广播包括该待调度的多个站点的调度信息的下行PPDU或触发帧,其具体实现可以参见上述图4所描述的方法流程中的步骤403~步骤406中的相关描述,本发明实施例在此不再赘述。
进一步地,在一种可选的实施方式中,若下行PPDU或触发帧中包括针对本端的调度信息,则根据下行PPDU或触发帧中包括的针对本端的调度信息进行上行或者下行数据传输之前,还可以包括以下步骤:
31)、检测该竞争成功的当前信道的第二信号检测能量;
32)、判断第二信号检测能量是否小于第二预设门限;
33)、若小于,执行根据下行PPDU或触发帧中包括的针对本站点的调度信息进行上行或者下行数据传输的步骤。
为了进一步提高系统的数据传输性能,本发明实施例中,针对信道竞争阶段和数据传输阶段设置不同的CCA门限:在信道竞争阶段,可以 通过判断检测到的信号检测能量是否小于第一预设门限确定是否进行信道竞争;在数据传输阶段,通过判断检测到的信号检测能量是否小于第二预设门限确定是否进行数据传输。其中,第一预设门限和第二预设门限可以根据具体场景设定,如第一预设门限为-82dbm,第二预设门限为-62dbm;优选地,第二预设门限大于第一预设门限。
相应地,基于上述设置,站点确定接收到的下行PPDU或触发帧中包括针对本站点的调度信息之后,在进行数据传输之前,可以先检测该竞争成功的当前信道的信号检测能量,并判断检测到的该竞争成功的当前信道的信号检测能量是否小于第二预设门限,以确定是否进行数据传输。当站点判断检测到的该竞争成功的当前信道的信号检测能量小于第二预设门限时,站点可以根据下行PPDU或触发帧中包括的针对本站点的调度信息进行上行或者下行数据传输。
本发明实施例中,在数据传输阶段,AP检测该竞争成功的当前信道的信号检测能量时,可以检测该竞争成功的当前信道整个带宽的信号检测能量,也可以检测该竞争成功的当前信道中的上述下行PPDU中包括的针对本端的调度信息指示的子带的信号检测能量。
应该认识到,检测该竞争成功的当前信道的信号检测能量为检测整个带宽的信号检测能量时,以及检测该竞争成功的当前信道的信号检测能量为检测该竞争成功的当前信道中的上述下行PPDU中包括的针对本端的调度信息指示的子带的信号检测能量时,对应的第二预设门限可以不同。
举例来说,假设当前信道的带宽为20MHz,共包括8个子带,若在整个带宽上的信道空闲评估的门限(第二预设门限)为CCAdata,则每个子带上的信道空闲评估的门限可以为1/8*CCAdata。
可见,在图5所描述的方法流程中,BSS中的站点竞争信道成功后,会将信道使用权转交给本BSS中的AP,从而提高了AP竞争信道成功的概率,进而,提高了系统的数据传输性能。
基于图1所示的系统架构,本发明实施例中提供了一种信道竞争方法,如图6所示,为本发明实施例提供的一种信道竞争方法的流程示意 图,可以包括以下步骤:
需要说明书的是,步骤601至步骤602的执行主体为上述系统架构中的AP或AP中的处理器,如CPU。为便于描述,以下以步骤601至步骤602的执行主体为上述系统架构中的AP为例进行描述。
步骤601、当AP需要进行数据传输,且未在当前信道解析出本BSS的站点发送的信道竞争包时,在当前信道发送信道竞争包,以进行信道竞争。
本发明实施例中,考虑到在系统中,每个BSS中会包括多个与该BSS的AP关联的站点,且AP对站点进行时频资源调度之后,站点才能进行上行数据传输,而AP需要成功竞争到信道才能对站点进行时频资源调度,若AP竞争信道失败,则无法对站点进行时频资源调度,从而影响站点的上行数据传输,因此,为了提高系统中的数据传输效率,需要提高AP抢占信道的成功率。
为了达到上述目的,在本发明实施例中,BSS中的站点竞争信道成功时,会将信道使用权转交给AP,即同一BSS中,站点可以帮助AP抢占信道,以提高AP抢占信道的成功率。
本发明实施例中,当BSS中的AP需要进行数据传输,且未在当前信道解析出本BSS的站点发送的信道竞争包时,AP可以发送信道竞争包,以进行信道竞争。
值得说明的是,在本发明实施例中,若AP在当前信道解析出本BSS的站点发送的信道竞争包,则AP可以确定本BSS竞争信道成功,此时,AP不需要再进行当前信道的信道竞争。
作为一种可选的实现方式,本发明实施例中,AP在发送信道竞争包之前,可以检测到当前信道的信号检测能量(第一信号检测能量)之后,并通过判断该第一信号检测能量是否小于预设门限(第一预设门限,可以根据具体场景设置)的方式确定是否参与信道竞争。当AP判断第一信号检测能量小于第一预设门限时,AP可以确定参与信道竞争,并在当前信道发送信道竞争包。
在本发明实施例中,若AP在当前信道发送信道竞争包之后,若在预设时间内未在当前信道解析出其它AP或站点发送的信道竞争包,则AP 可以确定竞争当前信道成功。
需要注意的是,在本发明实施例中,当AP检测到当前信道的第一信号检测能量,且判断该第一信号检测能量等于或大于第一预设门限时,AP可以不参与当前信道的信道竞争,本发明实施例对此不做限定。
步骤602、当确定竞争当前信道成功后,根据本BSS的任一站点发送的响应帧的接收情况,利用该竞争成功的当前信道向本BSS广播下行PPDU或触发帧,该下行PPDU或触发帧中包括针对本BSS的多个站点的调度信息。
本发明实施例中,AP确定竞争当前信道成功之后,AP可以通过预设的调度策略确定待调度的站点(本BSS的站点),并在当前信道向本BSS的站点发送下行PPDU或触发帧,该下行PPDU或触发帧中可以包括针对上述待调度的站点的调度信息。本BSS的站点接收到AP发送的下行PPDU或触发帧之后,对该下行PPDU或触发帧进行解析,获取其中包括的调度信息,根据对应的调度信息进行上行和/或下行数据传输。
例如,AP可以在下行PPDU的SIG域中携带针对待调度的站点的调度信息,该调度信息可以指示AP为对应的站点分配的时频资源,从而,对应的站点可以根据该时频资源确定接收AP发送的下行数据的时间和频域,或,进行上行数据传输的时间和频域。
在一种可选的实施方式中,AP根据本BSS的任一站点发送的响应帧的接收情况,利用该竞争成功的当前信道向本BSS广播下行PPDU或触发帧确定竞争当前信道成功时,利用该当前信道向本BSS广播下行PPDU之前,还可以包括以下步骤:
41)、判断是否在该竞争成功的当前信道接收到本BSS的站点发送的响应帧;
42)、若是,利用该竞争成功的当前信道向本BSS广播下行PPDU。
在该实施方式中,BSS中的站点在当前信道解析出本BSS的AP发送的信道竞争包时,该站点可以检测该当前信道的信号检测能量,并判断该信号检测能量是否小于上述第一预设门限,若小于,利用该当前信道向本BSS的AP发送响应帧,以对该站点的相邻站点产生信号干扰,使得该站点的相邻站点检测到的当前信道的信号检测能量增大,从而, 可以降低该站点的相邻站点参与竞争该当前信道的概率,实现接收端保护。
相应地,AP确定竞争当前信道成功之后,进入数据传输阶段之前,AP可以判断是否在竞争成功的当前信道接收到本BSS的站点发送的响应帧,若接收到,AP可以认为本BSS中存在信道空闲的站点,从而,AP可以对本BSS的站点进行调度,在当前信道向本BSS的站点发送包括针对本BSS的站点的调度信息的下行PPDU或触发帧;否则,AP可以不对本BSS的站点进行调度。
上述响应帧可以是CTS,CTX或是某种新定义的控制帧或管理帧。
在另一种可选的实施方式中,AP根据本BSS的任一站点发送的响应帧的接收情况,利用该竞争成功的当前信道向本BSS广播下行PPDU或触发帧,可以包括以下步骤:
51)、判断是否在该竞争成功的当前信道接收到本BSS的站点发送的响应帧;其中,该响应帧中可以包括对应的站点检测到的当前信道的信道状态信息以及该站点的标识;
52)、若在该竞争成功的当前信道接收到本BSS的站点发送的响应帧,根据该响应帧中包括的信道状态信息以及站点的标识确定待调度的多个站点;
53)、生成下行PPDU或触发帧,该下行PPDU或触发帧包括将该待调度的多个站点的调度信息添加至下行PPDU;
54)、利用该竞争成功的当前信道向本BSS广播包括该待调度的多个站点的调度信息的下行PPDU或触发帧。
在该实施方式中,BSS中的站点在当前信道解析出本BSS的AP发送的信道竞争包时,该站点可以检测该当前信道的信号检测能量,并判断该信号检测能量是否小于上述第一预设门限,若小于,利用该当前信道向本BSS的AP发送响应帧,其中,该站点可以从当前信道中随机选择一个子信道发送该响应帧,该响应帧中可以包括该站点检测到的当前信道的信道状态信息,以及该站点的标识,该信道状态信息可以包括历史SNR、瞬时干扰强度等。
相应地,AP确定竞争当前信道成功之后,进入数据传输阶段之前, AP可以判断是否在该竞争成功的当前信道接收到本BSS的站点发送的响应帧,若接收到,AP可以根据该响应帧中包括的信道状态信息以及站点的标识确定待调度的多个站点,生成包括将该待调度的多个站点的调度信息的下行PPDU或触发帧之后,利用该竞争成功的当前信道向本BSS广播包括该待调度的多个站点的调度信息的下行PPDU或触发帧。
举例来说,假设响应帧中包括的信道状态信息为历史SNR,则AP可以根据在当前信道接收到的响应帧中包括的信道状态信息,将包括的历史SNR大于预设阈值的响应帧对应的本BSS的站点确定为待调度的站点。
又举例来说,假设响应帧中包括的信道状态信息为瞬时干扰强度,则AP可以根据在当前信道接收到的响应帧中包括的信道状态信息,将包括的瞬时干扰强度小于预设阈值的响应帧对应的本BSS的站点确定为调度的站点。
上述响应帧可以是扩展的CTS,CTX或是某种新定义的控制帧或管理帧。
基于图1所示的系统架构,本发明实施例提供的一种信道竞争方法,如图7所示,为本发明实施例提供的一种信道竞争方法的流程示意图,可以包括以下步骤:
需要说明书的是,步骤701至步骤706的执行主体为上述系统架构中的站点或站点中的处理器,如CPU。为便于描述,以下以步骤701至步骤706的执行主体为上述系统架构中的站点为例进行描述。
步骤701、判断是否在当前信道解析出本BSS的AP发送的信道竞争包。若是,转至步骤702;否则,结束当前流程。
步骤702、确定本BSS竞争当前信道成功。
本发明实施例中,考虑到在系统中,每个BSS中会包括多个与该BSS的AP关联的站点,且AP对站点进行时频资源调度之后,站点才能进行上行数据传输,而AP需要成功竞争到信道才能对站点进行时频资源调度,若AP竞争信道失败,则无法对站点进行时频资源调度,从而影响站点的上行数据传输,因此,为了提高系统中的数据传输效率,需要提高AP抢占信道的成功率。
为了达到上述目的,在本发明实施例中,BSS中的站点竞争信道成功时,会将信道使用权转交给AP,即同一BSS中,站点可以帮助AP抢占信道,以提高AP抢占信道的成功率。
本发明实施例中,当AP需要进行数据传输,且未在当前信道解析出本BSS的站点发送的信道竞争包时,AP可以通过检测当前信道的信号检测能量的方式确定是否参与信道竞争,并当检测到的信号检测能量低于预设门限(第一预设门限)时,AP可以发送信道竞争包,以进行信道竞争。当站点在当前信道解析出本BSS的AP发送的信道竞争包时,确定AP竞争当前信道成功。
需要注意的是,本发明实施例中,当站点未在当前信道解析出本BSS的AP发送的信道竞争包时,站点可以通过信道空闲评估确定是否参与信道竞争,即检测当前信道的信号检测能量,并根据该信号检测能量是否小于预设门限确定是否发送信道竞争包参与信道竞争,本发明实施例对此不做限定。
步骤703、在该竞争成功的当前信道向本BSS的AP发送响应帧,以使本BSS的AP在接收到响应帧时,利用该竞争成功的当前信道向本BSS广播下行PPDU或触发帧。
本发明实施例中,站点接收到本BSS的AP发送的信道竞争包,确定本BSS竞争信道成功之后,可以在该竞争成功的当前信道向本BSS的AP发送响应帧,以触发本BSS的AP对本BSS的站点进行调度。
AP接收到本BSS的站点发送的响应帧之后,可以根据调度策略确定需要调度的站点,并利用竞争成功的当前信道向本BSS广播下行PPDU或触发帧,其中,该下行PPDU或触发帧中可以包括本BSS的多个站点的上行或者下行调度信息。
步骤704、在该竞争成功的当前信道接收本BSS的AP发送的下行PPDU或触发帧。
步骤705、判断该下行PPDU或触发帧中是否包括针对本站点的调度信息。若判断为是,转至步骤705;否则,结束当前流程。
步骤706、根据下行PPDU中包括的针对本站点的调度信息进行上行或者下行数据传输。
本发明实施例中,站点接收到本BSS的AP发送的下行PPDU或触发帧之后,可以对该下行PPDU或触发帧进行解析,判断该下行PPDU或触发帧中是否包括针对本站点的调度信息,若该下行PPDU中包括针对本站点的调度信息,则该站点可以根据该下行PPDU中包括的针对本站点的调度信息进行上行或者下行数据传输。
基于图1所示的系统架构,本发明实施例还提供了另一种信道竞争方法,如图8所示,为本发明实施例提供的另一种信道竞争方法的流程示意图,可以包括以下步骤:
需要说明书的是,步骤801至步骤808的执行主体为上述系统架构中的站点或站点中的处理器,如CPU。为便于描述,以下以步骤801至步骤808的执行主体为上述系统架构中的站点为例进行描述。
步骤801、判断是否在当前信道解析出本BSS的AP发送的信道竞争包。若是,转至步骤802;否则,结束当前流程。
步骤802、确定本BSS竞争当前信道成功。
其中,步骤801~步骤802的具体实现可以参见上述图7所述的方法流程中步骤701~步骤702中的相关描述,本发明实施例在此不再赘述。
步骤803、检测该竞争成功的当前信道的第一信号检测能量。
步骤804、判断该第一信号检测能量是否小于第一预设门限。若是,转至步骤805;否则,结束当前流程。
步骤805、在该竞争成功的当前信道向本BSS的AP发送响应帧,以使本BSS的AP在接收到响应帧时,利用该该竞争成功的当前信道向本BSS广播下行PPDU或触发帧。
本发明实施例中,BSS的站点确定本BSS的AP竞争当前信道成功时,可以检测当前信道的信号检测能量(第一信号检测能量),并判断该第一信号检测能量是否小于预设门限(第一预设门限)。
当该站点判断第一信号检测能量小于第一预设门限时,该站点可以利用该当前信道向本BSS的AP发送响应帧,以对该站点的相邻站点产生信号干扰,使该站点的相邻站点检测到的当前信道的信号检测能量增大,从而,可以降低该站点的相邻站点参与竞争该当前信道的概率,实 现接收端保护。
在本发明实施例中,AP接收到本BSS的站点发送的响应帧时,可以认为本BSS中存在信道空闲的站点,从而,AP可以对本BSS的站点进行调度,在当前信道向本BSS广播包括针对本BSS的站点的调度信息的下行PPDU或PPDU;否则,AP可以不对本BSS的站点进行调度。
需要注意的是,在本发明实施例中,站点向本BSS的AP发送响应帧时,可以在从当前信道中随机选择一个子信道发送,也可以在该当前信道的各子信道中均发送,其具体实现本发明实施例不做限定。
步骤806、在该竞争成功的当前信道接收本BSS的AP发送的下行PPDU或触发帧。
步骤807、判断该下行PPDU或触发帧中是否包括针对本站点的调度信息。若是,转至步骤808;否则,结束当前流程。
步骤808、根据该下行PPDU或触发帧中包括的针对本站点的调度信息进行上行或者下行数据传输。
本发明实施例中,当AP竞争当前信道成功,且在当前信道接收到本BSS的站点发送的响应帧时,AP可以根据调度策略确定待调度的站点,并利用当前信道向本BSS广播包括该待调度的站点的调度信息的下行PPDU或触发帧。例如,AP可以在下行PPDU中的SIG域中包括待调度的站点的调度信息,该调度信息可以指示AP为对应的站点分配的时频资源,从而,对应的站点可以根据该时频资源确定接收AP发送的下行数据的时间和频域,或,进行上行数据传输的时间和频域。
站点接收到本BSS的AP发送的下行PPDU或触发帧之后,可以对该下行PPDU或触发帧进行解析,判断该下行PPDU或触发帧中是否包括针对本站点的调度信息,若该下行PPDU或触发帧中包括针对本站点的调度信息,则该站点可以根据该下行PPDU或触发帧中包括的针对本站点的调度信息进行上行或下行数据传输。
进一步地,在一种可选的实施方式中,站点判断下行PPDU或触发帧中包括针对本站点的调度信息之后,以及根据下行PPDU或触发帧中包括的针对本站点的调度信息进行上行或下行数据传输之前,还可以包括以下步骤:
71)、检测该竞争成功的当前信道的第二信号检测能量;
72)、判断该第二信号检测能量是否小于第二预设门限;
73)、若小于,执行根据下行PPDU或触发帧中包括的调度信息进行上行或者下行数据传输的步骤。
为了进一步提高系统的数据传输性能,本发明实施例中,针对信道竞争阶段和数据传输阶段设置不同的CCA门限:在信道竞争阶段,可以通过判断检测到的信号检测能量是否小于第一预设门限确定是否进行信道竞争;在数据传输阶段,通过判断检测到的信号检测能量是否小于第二预设门限确定是否进行数据传输。其中,第一预设门限和第二预设门限可以根据具体场景设定,如第一预设门限为-82dbm,第二预设门限为-62dbm;优选地,第一预设门限大于第二预设门限。
相应地,基于上述设置,站点判断下行PPDU或触发帧中包括针对本站点的调度信息之后,在进行数据传输之前,可以先检测该竞争成功的当前信道的信号检测能量(第二信号检测能量),并判断检测到的该竞争成功的当前信道的第二信号检测能量是否小于第二预设门限,以确定是否进行数据传输。当站点判断检测到的该竞争成功的当前信道的第二信号检测能量小于第二预设门限时,站点可以根据下行PPDU中包括的针对本站点的调度信息进行上行或者下行数据传输。
基于图1所示的系统架构,本发明实施例还提供了另一种信道竞争方法,如图9所示,为本发明实施例提供的另一种信道竞争方法的流程示意图,可以包括以下步骤:
需要说明书的是,步骤901至步骤908的执行主体为上述系统架构中的站点或站点中的处理器,如CPU。为便于描述,以下以步骤901至步骤908的执行主体为上述系统架构中的站点为例进行描述。
步骤901、判断是否在当前信道解析出本BSS的AP发送的信道竞争包。若是,转至步骤902;否则,结束当前流程。
步骤902、确定本BSS竞争当前信道成功。
其中,步骤901~步骤902的具体实现可以参见上述图7所述的方法流程中步骤701~步骤702中的相关描述,本发明实施例在此不再赘述。
步骤903、检测该竞争成功的当前信道的第一信号检测能量。
步骤904、判断该第一信号检测能量是否小于第一预设门限。若是,转至步骤905;否则,结束当前流程。
步骤905、从该竞争成功的当前信道中随机选择一个子信道,并利用该子信道向本BSS的AP发送响应帧,该响应帧中包括本端检测到的该竞争成功当前信道的信道状态信息,以及本端的标识,以使本BSS的AP根据接收到的响应帧中包括的信道状态信息,以及站点的标识确定待调度的站点。
本发明实施例中,BSS的站点确定本BSS的AP竞争当前信道成功时,可以检测该竞争成功的当前信道的信号检测能量(第一信号检测能量),并判断该第一信号检测能量是否小于预设门限(第一预设门限)。
当该站点判断第一信号检测能量小于第一预设门限时,该站点可以从该竞争成功的当前信道中随机选择一个子信道,并利用该子信道向本BSS的AP发送响应帧,该响应帧中可以包括该站点检测到的该竞争成功的当前信道的信道状态信息,以及该站点的标识。其中,该信道状态信息可以包括历史SNR、瞬时干扰强度等。
AP接收到本BSS的站点发送的响应帧时,可以根据该响应帧中包括的信道状态信息,以及站点的标识,确定待调度的站点,进而,AP可以对本BSS的该待调度的站点进行调度,在当前信道向本BSS广播包括该待调度的站点的调度信息的下行PPDU或触发帧;否则,AP可以不对本BSS的站点进行调度。
需要注意的是,在本发明实施例中,当多个站点选择当前信道的同一个子信道发送响应帧时,AP可能无法解析出该多个站点发送的响应帧,此时,AP可以再次利用该当前信道向本BSS广播信道竞争包,以使本BSS的站点在当前信道解析出本BSS的AP发送的信道竞争包后,重新随机选择一个子信道向本BSS的AP发送响应帧,直至AP解析出所有响应帧。
步骤906、在该竞争成功的当前信道接收本BSS的AP发送的下行PPDU或触发帧。
步骤907、判断该下行PPDU或触发帧中是否包括针对本站点的调度 信息。若是,转至步骤908;否则,结束当前流程。
步骤908、根据该下行PPDU或触发帧中包括的针对本站点的调度信息进行上行或者下行数据传输。
本发明实施例中,当AP竞争当前信道成功,且在该竞争成功的当前信道接收到本BSS的站点发送的响应帧时,AP可以该响应帧中包括的信道状态信息,以及站点的标识确定待调度的站点,并利用该竞争成功的当前信道向本BSS广播包括该待调度的站点的调度信息的下行PPDU或触发帧。例如,AP可以在下行PPDU中的SIG域中包括待调度的站点的调度信息,该调度信息可以指示AP为对应的站点分配的时频资源,从而,对应的站点可以根据该时频资源确定接收AP发送的下行数据的时间和频域,或,进行上行数据传输的时间和频域。
站点接收到本BSS的AP发送的下行PPDU或触发帧之后,可以对该下行PPDU或触发帧进行解析,判断该下行PPDU或触发帧中是否包括针对本站点的调度信息,若该下行PPDU或触发帧中包括针对本站点的调度信息,则该站点可以根据该下行PPDU或触发帧中包括的针对本站点的调度信息进行上行和/或下行数据传输。
需要注意的是,在本发明实施例中,当站点判断接收到的下行PPDU或触发帧中包括针对本端站点的调度信息之后,根据该下行PPDU或触发帧中包括的针对本端站点的调度信息进行上行和/或或者下行数据传输之前,还可以包括上述步骤71)~步骤73),其具体实现可以参见图8所描述的方法流程中的相关描述,本发明实施例不再赘述。
通过以上描述可以看出,在本发明实施例中,BSS中的站点竞争信道成功后,会将信道使用权转交给本BSS中的AP,从而提高了AP竞争信道成功的概率,进而,提高了系统的数据传输性能;此外,通过针对信道竞争阶段和数据传输阶段设置不同的CCA门限,可以进一步提高了系统的数据传输系能。
基于图1所示的系统架构,本发明实施例提供了一种通信装置,该通信装置可以为AP或者应用于AP中的处理器,如图10所示,为本发 明实施例提供的一种通信装置的结构示意图,可以包括:
信道竞争模块1001,用于判断在当前信道上是否解析出本BSS的任一站点发送的信道竞争包;若是,确定本BSS竞争所述当前信道成功。
数据传输模块1002,用于利用所述竞争成功的当前信道向所述本BSS广播下行物理层协议数据单元PPDU或触发帧,所述下行PPDU或触发帧中包括针对所述本BSS的多个站点的上行或者下行调度信息。
本发明实施例中,考虑到在系统中,每个BSS中会包括多个与该BSS的AP关联的站点,且AP对站点进行时频资源调度之后,站点才能进行上行数据传输,而AP需要成功竞争到信道才能对站点进行时频资源调度,若AP竞争信道失败,则无法对站点进行时频资源调度,从而影响站点的上行数据传输,因此,为了提高系统中的数据传输效率,需要提高AP抢占信道的成功率。
为了达到上述目的,在本发明实施例中,BSS中的站点竞争信道成功时,会将信道使用权转交给AP,即同一BSS中,站点可以帮助AP抢占信道,以提高AP抢占信道的成功率。
本发明实施例中,站点在需要进行数据传输时,可以通过检测当前信道的信号检测能量的方式确定是否参与信道竞争,并当检测到的信号检测能量低于预设门限(第一预设门限)时,站点可以发送信道竞争包,以进行信道竞争。当AP在当前信道解析出本BSS的站点发送的信道竞争包时,确定竞争当前信道成功。
相应地,信道竞争模块1001判断在当前信道上解析出本BSS的站点发送的信道竞争包时,可以使能数据传输模块1002对本BSS的站点进行调度。数据传输模块1002在信道竞争模块1001使能后,可以利用该竞争成功的当前信道向本BSS广播下行PPDU或触发帧,该下行PPDU或触发帧中包括针对本BSS的多个站点的调度信息,以使接收到该下行PPDU的本BSS的站点根据该下行PPDU或触发帧中包括的对应的调度信息进行上行或者下行数据传输。
在可选实施例中,所述信道竞争模块1001,还可以用于确定本BSS竞争所述当前信道成功之后,记录在预设时间段内解析出在所述竞争成功的当前信道发送信道竞争包的所述本BSS的多个站点的标识;
相应地,所述数据传输模块1002,还可以用于确定所述多个站点的标识对应的多个站点的调度信息;生成下行PPDU或触发帧,所述下行PPDU或触发帧包括多个站点的调度信息;利用所述竞争成功的当前信道向所述本BSS广播包括所述多个站点的调度信息的下行PPDU或触发帧。
在该可选实施例中,可以预先设置一个时间段(该时间段可以根据具体场景设定,以下描述为T),在该预设时间段T内,各BSS中,AP和其关联的站点均可以进行空闲信道评估,即检测当前信道的信号检测能量是否小于预设门限,并当检测到当前信道的信号检测能量小于预设门限(第一预设门限)时,发送信道竞争包,以进行信道竞争。当AP接收到本BSS的站点发送的信道竞争包时,AP确定竞争当前信道成功,同时,AP可以统计在预设时间段T内解析出的本BSS的站点发送的信道竞争包,并记录在预设时间段T内解析出在该当前信道发送信道竞争包的本BSS的多个站点的标识。
具体的,信道竞争模块1001在确定本BSS竞争当前信道成功之后,可以记录在预设时间段T内解析出在该当前信道发送信道竞争包的该本BSS的多个站点,并在预设时间段到达之后,使能数据传输模块1002;数据传输模块1002在信道竞争模块1001使能后,可以确定上述多个站点的标识对应的多个站点的调度信息,并生成包括该多个站点的调度信息的下行PPDU或触发帧,进而利用该竞争成功的当前信道向本BSS广播包括该多个站点的调度信息的下行PPDU或触发帧。
在另一种可选实施例中,信道竞争模块1001,还可以用于确定本BSS竞争当前信道成功之后,统计在预设时间段内解析出的本BSS的站点在所述竞争成功的当前信道发送的信道竞争包;该信道竞争包中包括对应的站点检测到的所述竞争成功的当前信道的信道状态信息;
相应地,所述数据传输模块1002,还可以用于根据解析出的信道竞争包中包括的信道状态信息确定待调度的多个站点;生成包括所述待调度的多个站点的调度信息的下行PPDU或触发帧;利用所述竞争成功的当前信道向所述本BSS广播包括所述待调度的多个站点的调度信息的下行PPDU或触发帧。
在该可选实施例中,可以预先设置一个时间段(该时间段可以根据具体场景设定,以下描述为T),在该预设时间段T内,各BSS中,AP 和其关联的站点均可以进行空闲信道评估,即检测当前信道的信号检测能量是否小于预设门限,并当检测到当前信道的信号检测能量小于预设门限(第一预设门限)时,发送信道竞争包,以进行信道竞争;其中,该信道竞争包中还可以包括站点检测到的当前信道的信道状态信息,如历史SNR、瞬时干扰强度等。当AP接收到本BSS的站点发送的信道竞争包时,AP确定竞争当前信道成功,同时,AP可以统计在预设时间段T内解析出的本BSS的站点发送的信道竞争包。
具体的,信道竞争模块1001可以在确定本BSS竞争当前信道成功之后,统计在预设时间段T内解析出的本BSS的站点在该当前信道发送的信道竞争包,该信道竞争包中包括对应的站点检测到的该当前信道的信道状态信息,并在预设时间段达到之后,使能数据传输模块1002;数据传输模块1002在信道竞争模块1001使能后,可以根据解析出的信道竞争包中包括的信道状态信息确定待调度的多个站点,并生成包括该多个站点的调度信息的下行PPDU或触发帧,如将该多个站点的调度信息添加至下行PPDU中的SIG域中,进而利用该竞争成功的当前信道向本BSS广播包括上述待调度的多个站点的调度信息的下行PPDU或触发帧。
在可选实施例中,所述信道竞争包是所述站点在需要进行数据传输,且检测到所述当前信道的信号检测能量小于第一预设门限时发送的;
相应地,图10所示的通信装置还可以包括:
信号检测模块1003,用于检测所述竞争成功的当前信道的信号检测能量;
所述数据传输模块1002,还可以用于当所述信号检测模块1003检测到的所述竞争成功的当前信道的信号检测能量第二预设门限时,利用所述竞争成功的当前信道向本BSS广播下行PPDU或触发帧。
其中,所述第二预设门限不同于所述第一预设门限。
为了进一步提高系统的数据传输性能,本发明实施例中,针对信道竞争阶段和数据传输阶段设置不同的CCA门限:在信道竞争阶段,可以通过判断检测到的信号检测能量是否小于第一预设门限确定是否进行信道竞争;在数据传输阶段,通过判断检测到的信号检测能量是否小于第二预设门限确定是否进行数据传输。其中,第一预设门限和第二预设门 限可以根据具体场景设定,如第一预设门限为-82dbm,第二预设门限为-62dbm;优选地,第一预设门限大于第二预设门限。
相应地,基于上述设置,AP竞争当前信道成功之后,在进行数据传输之前,可以先通过信号检测模块1002检测该竞争成功的当前信道的信号检测能量,并判断检测到的当前信道的信号检测能量是否小于第二预设门限,以确定是否进行数据传输。当检测到的当前信道的信号检测能量小于第二预设门限时,数据传输模块1002可以在该竞争成功的当前信道向本BSS的站点发送下行PPDU或触发帧。
在可选实施例中,所述信号检测模块1003可以具体用于,检测所述竞争成功的当前信道整个带宽的信号检测能量;或,检测所述竞争成功的当前信道各子带的信号检测能量。
在可选实施例中,当所述信号检测模块检测所述竞争成功的当前信道各子带的信号检测能量时,所述数据传输模块1002可以具体用于,当所述竞争成功的当前信道任一子带的信号检测能量小于第二预设门限时,确定检测到的所述当前信道的信号检测能量小于第二预设门限,否则,确定检测到的所述当前信道的信号检测能量大于或等于第二预设门限。
应该认识到,检测当前信道的信号检测能量为检测整个带宽的信号检测能量时,以及检测当前信道的信号检测能量为检测各子带的信号检测能量时,对应的第二预设门限可以不同。
举例来说,假设当前信道的带宽为20MHz,共包括8个子带,若在整个带宽上的信道空闲评估的门限(第二预设门限)为CCAdata,则每个子带上的信道空闲评估的门限可以为1/8*CCAdata。
请参阅图11,图11是本发明实施例提供的一种AP的结构示意图。其中,如图11所示的AP可以包括:总线1104,以及与所述总线互连的处理器1101、存储器1102,以及输入输出模块1103,所述存储器1102中存储有程序代码,且所述处理器1101用于调用所述存储器1102中存储的程序代码,执行以下操作:
判断在当前信道上是否解析出本BSS的任一站点发送的信道竞争包;若 是,所述接入点确定本BSS竞争所述当前信道成功;
通过输入输出模块1003利用所述竞争成功的当前信道向所述本BSS广播下行PPDU或触发帧,所述下行PPDU或触发帧中包括针对所述本BSS的多个站点的上行或者下行调度信息。
在可选实施例中,所述处理器1101用于调用所述存储器1102中存储的程序代码确定所述本BSS竞争所述当前信道成功之后,以及通过输入输出模块1003利用所述竞争成功的当前信道向所述本BSS广播下行PPDU或触发帧之前,还可以执行以下操作:
记录在预设时间段内解析出在所述竞争成功的当前信道发送信道竞争包的所述本BSS的多个站点的标识;
所述处理器1101用于调用所述存储器1102中存储的程序代码通过输入输出模块1003利用所述竞争成功的当前信道向所述本BSS广播下行PPDU或触发帧,可以具体包括:
确定所述多个站点的标识对应的多个站点的调度信息;
生成下行PPDU或触发帧,所述下行PPDU或触发帧包括所述多个站点的调度信息;
通过输入输出模块1003利用所述竞争成功的当前信道向所述本BSS广播包括所述多个站点的调度信息的下行PPDU或触发帧。
在可选实施例中,所述处理器1101用于调用所述存储器1102中存储的程序代码确定所述本BSS竞争所述当前信道成功之后,以及通过输入输出模块1003利用所述竞争成功的当前信道向所述本BSS广播下行PPDU或触发帧之前,还可以执行以下操作:
统计在预设时间段内解析出的本BSS的站点在所述竞争成功的当前信道发送的信道竞争包;该信道竞争包中包括对应的站点检测到的所述竞争成功的当前信道的信道状态信息;
所述处理器1101用于调用所述存储器1102中存储的程序代码通过输入输出模块1003利用所述竞争成功的当前信道向所述本BSS广播下行PPDU或触发帧,包括:
根据解析出的信道竞争包中包括的信道状态信息确定待调度的多个站点;
生成下行PPDU或触发帧,该下行PPDU或触发帧包括所述待调度的多个 站点的调度信息;
通过输入输出模块1003利用所述竞争成功的当前信道向所述本BSS广播包括所述待调度的多个站点的调度信息的下行PPDU或触发帧。
在可选实施例中,所述信道竞争包是所述站点在需要进行数据传输,且检测到所述当前信道的信号检测能量小于第一预设门限时发送的;
所述处理器1101用于调用所述存储器1102中存储的程序代码通过输入输出模块1003利用所述竞争成功的当前信道向所述本BSS广播下行PPDU或触发帧之前,还可以执行以下操作:
检测所述竞争成功的当前信道的信号检测能量;判断检测到的所述竞争成功的当前信道的信号检测能量是否小于第二预设门限;所述第二预设门限不同于所述第一预设门限;
若小于,执行所述通过输入输出模块1003利用所述竞争成功的当前信道向本BSS广播下行PPDU或触发帧的步骤。
在可选实施例中,所述处理器1101用于调用所述存储器1102中存储的程序代码检测所述竞争成功的当前信道的信号检测能量,包括:
检测所述竞争成功的当前信道整个带宽的信号检测能量;或,
检测所述竞争成功的当前信道各子带的信号检测能量。
在可选实施例中,当检测所述竞争成功的当前信道各子带的信号检测能量时,所述处理器1101用于调用所述存储器1102中存储的程序代码判断检测到的所述竞争成功的当前信道的信号检测能量是否小于第二预设门限包括:
判断所述竞争成功的当前信道任一子带的信号检测能量是否小于第二预设门限,若是,则确定检测到的所述竞争成功的当前信道的信号检测能量小于第二预设门限,若否,则确定检测到的所述竞争成功的当前信道的信号检测能量大于或等于第二预设门限。
需要说明的是,图11所示的AP仅仅标示了AP中用于执行本发明实施例提供的信道竞争方法所需的组件,对于AP能够具备的物理按键、电源、外壳等其他组件本发明实施例不作标示,因为这不影响本发明实施例的实现。
基于图1所示的系统架构,本发明实施例提供了一种通信装置,该 通信装置可以为站点或应用于站点中的处理器,如图12所示,为本发明实施例提供的一种通信装置的结构示意图,可以包括:
信道竞争模块1201,用于当所述站点需要进行数据传输,且未在当前信道解析出本BSS的AP发送的信道竞争包时,在所述当前信道发送信道竞争包,以使所述本BSS的AP在所述当前信道解析出所述信道竞争包时,确定本BSS竞争所述当前信道成功;
数据传输模块1202,用于在所述竞争成功的当前信道接收所述本BSS的AP发送的下行PPDU或触发帧;当所述下行PPDU或触发帧中包括针对本站点的调度信息时,根据所述下行PPDU或触发帧中包括的所述针对本站点的调度信息进行上行或下行数据传输。
本发明实施例中,考虑到在系统中,每个BSS中会包括多个与该BSS的AP关联的站点,且AP对站点进行时频资源调度之后,站点才能进行上行数据传输,而AP需要成功竞争到信道才能对站点进行时频资源调度,若AP竞争信道失败,则无法对站点进行时频资源调度,从而影响站点的上行数据传输,因此,为了提高系统中的数据传输效率,需要提高AP抢占信道的成功率。
为了达到上述目的,在本发明实施例中,BSS中的站点竞争信道成功时,会将信道使用权转交给AP,即同一BSS中,站点可以帮助AP抢占信道,以提高AP抢占信道的成功率。
本发明实施例中,当BSS中的站点需要进行数据传输,且未在当前信道解析出本BSS的AP发送的信道竞争包时,站点可以发送信道竞争包进行信道竞争。
具体的,当站点需要进行传输,且未在当前信道解析出本BSS的AP发送的信道竞争包时,信号竞争模块可以在当前信道发送信道竞争包,以使本BSS的AP在该当前信道解析出该信道竞争包时,确定本BSS竞争该当前信道成功;数据传输模块1002可以在本BSS竞争当前信道成功之后,在该竞争成功的当前信道接收本BSS的AP发送的下行PPDU或触发帧,并当该下行PPDU或触发帧中包括针对本站点的调度信息时,根据该下行PPDU或触发帧中包括的针对本站点的调度信息进行上行或者下行数据传输。
在可选实施例中,所述信道竞争包中可以包括所述当前信道的信道状态信息,以使本BSS的AP根据该信道状态信息确定待调度的目标站点。
在可选实施例中,图12所示的通信装置还可以包括:
信号检测模块1203,用于检测所述当前信道的第一信号检测能量;
所述信道竞争模块1201,可以具体用于当所述信号检测模块1203检测到的第一信号检测能量小于第一预设门限时,在所述当前信道发送信道竞争包;
所述信号检测模块1203,还可以用于若所述下行PPDU或触发帧中包括针对本站点的调度信息,检测所述竞争成功的当前信道的第二信号检测能量;
所述数据传输模块1202,可以具体用于当所述信号检测模块1203检测到的第二信号检测能量小于第二预设门限时,根据所述下行PPDU或触发帧中包括的针对本站点的调度信息进行上行或下行数据传输。
为了进一步提高系统的数据传输性能,本发明实施例中,针对信道竞争阶段和数据传输阶段设置不同的CCA门限:在信道竞争阶段,可以通过判断检测到的信号检测能量是否小于第一预设门限确定是否进行信道竞争;在数据传输阶段,通过判断检测到的信号检测能量是否小于第二预设门限确定是否进行数据传输。其中,第一预设门限和第二预设门限可以根据具体场景设定,如第一预设门限为-82dbm,第二预设门限为-62dbm;优选地,第一预设门限小于第二预设门限。
相应地,基于上述设置,当需要进行数据传输,且未在当前信道解析出本BSS的AP发送的信道竞争包时,站点可以通过信号检测模块1003检测当前信道的第一信号检测能量,并当该第一信号检测能量小于第一预设门限时,使能信道竞争模块1201在该当前信道发送信道竞争包进行信道竞争。
进一步地,当本BSS竞争当前信道成功,且站点接收到的下行PPDU或触发帧中包括针对本站点的调度信息时,站点在进行数据传输之前,还可以通过信号检测模块1203检测该竞争成功的当前信道的第二信号检测能量,并当该第二信号检测能量小于第二预设门限时,使能数据传输模块1202根据下行PPDU或触发帧中包括的针对本站点的调度信息进行 上行或下行数据传输。
在可选实施例中,所述信号检测模块1003可以具体用于,检测所述竞争成功的当前信道整个带宽的第二信号检测能量;或,检测所述竞争成功的当前信道中的所述下行PPDU或触发帧中包括的针对所述站点的调度信息指示的子带的第二信号检测能量。
请参阅图13,图13是本发明实施例提供的一种站点的结构示意图。其中,如图13示的站点可以包括:总线1304,以及与所述总线互连的处理器1301、存储器1302,以及输入输出模块1303,所述存储器1302中存储有程序代码,且所述处理器1301用于调用所述存储器1302中存储的程序代码,执行以下操作:
当站点需要进行数据传输,且未在当前信道解析出本BSS的AP发送的信道竞争包时,通过输出输出模块1303在所述当前信道发送信道竞争包,以使所述本BSS的AP在所述当前信道解析出所述信道竞争包时,确定本BSS竞争所述当前信道成功;
通过输出输出模块1303在所述竞争成功的当前信道接收所述本BSS的AP发送的下行物理层协议数据单元PPDU或触发帧;
判断所述下行PPDU或触发帧中是否包括针对本站点的调度信息;
若是,通过输出输出模块1303根据所述下行PPDU或触发帧中包括的所述针对本站点的调度信息进行上行或者下行数据传输。
在可选实施例中,所述信道竞争包中包括所述当前信道的信道状态信息,以使本BSS的AP根据该信道状态信息确定待调度的目标站点。
在可选实施例中,所述处理器1301调用所述存储器1302中存储的程序代码通过输入输出模块1303在所述当前信道发送信道竞争包之前,还可以执行以下操作:
检测所述当前信道的第一信号检测能量;
判断所述第一信号检测能量是否小于第一预设门限;若是,执行在所述当前信道发送信道竞争包的步骤;
若所述下行PPDU或触发帧中包括针对本站点的调度信息,所述根据所述下行PPDU或触发帧中包括的针对本端的调度信息进行上行或者 下行数据传输之前,还包括:
检测所述竞争成功的当前信道的第二信号检测能量;判断所述第二信号检测能量是否小于第二预设门限;所述第二预设门限不同于所述第一预设门限;
若小于,执行所述通过输入输出模块1303根据所述下行PPDU或触发帧中包括的针对本站点的调度信息进行上行或者下行数据传输的步骤。
在可选实施例中,所述处理器1301调用所述存储器1302中存储的程序代码检测所述竞争成功的当前信道的第二信号检测能量,可以具体包括:
检测所述竞争成功的当前信道整个带宽的第二信号检测能量;或,
检测所述竞争成功的当前信道中的所述PPDU或触发帧中包括的针对本站点的调度信息指示的子带的第二信号检测能量。
需要说明的是,图13所示的站点仅仅标示了站点中用于执行本发明实施例提供的信道竞争方法所需的组件,对于站点能够具备的物理按键、电源、外壳等其他组件本发明实施例不作标示,因为这不影响本发明实施例的实现。
基于图1所示的系统架构,本发明实施例提供了一种通信装置,该通信装置可以为AP或应用于AP中的处理器,如图14所示,为本发明实施例提供的一种通信装置的结构示意图,可以包括:
信道竞争模块1401,用于当所述AP需要进行数据传输,且未在当前信道解析出本基本服务集BSS的任一站点发送的信道竞争包时,在所述当前信道发送信道竞争包,以进行信道竞争;
数据传输模块,用于当确定竞争所述当前信道成功后,根据所述本BSS的任一站点发送的响应帧的接收情况,利用所述竞争成功的当前信道向所述本BSS广播下行物理层协议数据单元PPDU或触发帧,所述下行PPDU或触发帧中包括针对本BSS的多个站点的调度信息。
本发明实施例中,考虑到在系统中,每个BSS中会包括多个与该BSS的AP关联的站点,且AP对站点进行时频资源调度之后,站点才能进行 上行数据传输,而AP需要成功竞争到信道才能对站点进行时频资源调度,若AP竞争信道失败,则无法对站点进行时频资源调度,从而影响站点的上行数据传输,因此,为了提高系统中的数据传输效率,需要提高AP抢占信道的成功率。
为了达到上述目的,在本发明实施例中,BSS中的站点竞争信道成功时,会将信道使用权转交给AP,即同一BSS中,站点可以帮助AP抢占信道,以提高AP抢占信道的成功率。
本发明实施例中,当BSS中的AP需要进行数据传输,且未在当前信道解析出本BSS的站点发送的信道竞争包时,AP可以发送信道竞争包进行信道竞争
进一步地,在本发明实施例中,BSS中任一站点接收到本BSS的AP发送的信道竞争包之后,可以向本BSS的AP发送响应帧,以触发本BSS的AP对本BSS的站点进行调度。相应地,当AP确定竞争当前信道成功之后,AP可以根据本BSS的任一站点发送的响应帧的接收情况,对本BSS的站点进行调度。
在一种可选实施例中,所述数据传输模块1402,可以具体用于当在所述竞争成功的任一站点发送的响应帧时,利用所述竞争成功的当前信道向本BSS广播所述下行PPDU或触发帧。
具体的,BSS中的站点在当前信道解析出本BSS的AP发送的信道竞争包时,可以确定本BSS竞争当前信道成功,进而该站点可以检测该竞争成功的当前信道的信号检测能量,并判断该信号检测能量是否小于上述第一预设门限,若小于,利用该竞争成功的当前信道向本BSS的AP发送响应帧,以对该站点的相邻站点产生信号干扰,使得该站点的相邻站点检测到的该竞争成功的当前信道的信号检测能量增大,从而,可以降低该站点的相邻站点参与竞争该当前信道的概率,实现接收端保护。
相应地,AP确定竞争当前信道成功之后,进入数据传输阶段之前,当AP接收到本BSS的任一站点发送的响应帧,AP可以认为本BSS中存在信道空闲的站点,从而,AP可以对本BSS的站点进行调度,通过数据传输模块1402在该竞争成功的当前信道向本BSS包括包括针对本BSS的多个站点的调度信息的下行PPDU或触发帧;否则,AP可以不对本 BSS的站点进行调度。
在另一种可选实施例中,所述数据传输模块1402,可以具体用于当在所述竞争成功的当前信道接收到所述本BSS的站点发送的响应帧时,所述响应帧中包括对应的站点检测到的所述竞争成功的当前信道的信道状态信息以及该站点的标识,根据所述响应帧中包括的信道状态信息以及站点的标识确定待调度的多个站点;生成包括所述待调度的多个站点的调度信息的下行PPDU或触发帧;利用所述竞争成功的当前信道向所述本BSS广播包括所述待调度的多个站点的调度信息的下行PPDU或触发帧。
具体的,BSS中的站点在当前信道解析出本BSS的AP发送的信道竞争包时,可以认为本BSS竞争当前信道成功,进而该站点可以检测该竞争成功的当前信道的信号检测能量,并判断该信号检测能量是否小于上述第一预设门限,若小于,利用该竞争成功的当前信道向本BSS的AP发送响应帧,其中,该站点可以从该竞争成功的当前信道中随机选择一个子信道发送该响应帧,该响应帧中可以包括该站点检测到的该竞争成功的当前信道的信道状态信息,以及该站点的标识,该信道状态信息可以包括历史SNR、瞬时干扰强度等。
相应地,AP确定竞争当前信道成功之后,进入数据传输阶段之前,当AP接收到本BSS的站点发送的响应帧,且该响应帧中包括对应的站点检测到的该竞争成功的当前信道的信道状态信息时,数据传输模块1402可以根据响应帧中包括的信道状态信息以及站点的标识确定待调度的多个站点,并生成包括该待调度的多个站点的调度信息的下行PPDU或触发帧,进而利用该竞争成功的当前信道向本BSS广播包括该待调度的多个站点的调度信息的下行PPDU或触发帧。
在可选实施例中,图14所示的通信装置还可以包括:
信号检测模块1403,用于检测所述当前信道的第一信号检测能量;
相应地,所述信道竞争模块1401,可以具体用于当所述信号检测模块1403检测到的第一信号检测能量小于第一预设门限时,在所述当前信道发送信道竞争包;
所述响应帧为所述本BSS的站点在所述当前信道解析出本BSS的 AP发送的信道竞争包,且检测到所述当前信道的信号检测能量小于第一预设门限时,利用所述当前信道向所述本BSS的AP发送的;
所述信号检测模块1403,还可以用于检测所述信道的第二信号检测能量;
相应地,所述数据传输模块1402,可以具体用于当所述信号检测模块1403检测到的第二信号检测能量小于第二预设门限时,利用所述竞争成功的当前信道向所述本BSS广播下行PPDU或触发帧;所述第二预设门限不同于所述第一预设门限。
请参阅图15,图15是本发明实施例提供的一种AP的结构示意图。其中,如图15所示的AP可以包括:总线1504,以及与所述总线互连的处理器1501、存储器1502,以及输入输出模块1503,所述存储器1502中存储有程序代码,且所述处理器1501用于调用所述存储器1502中存储的程序代码,执行以下操作:
当AP需要进行数据传输,且未在当前信道解析出本基本服务集BSS的任一站点发送的信道竞争包时,通过输入输出模块1503在所述当前信道发送信道竞争包,以进行信道竞争;
当确定竞争所述当前信道成功后,根据所述本BSS的任一站点发送的响应帧的接收情况,通过输入输出模块1503利用所述竞争成功的当前信道向所述本BSS广播下行物理层协议数据单元PPDU或触发帧,所述下行PPDU或触发帧中包括针对本BSS的多个站点的调度信息。
在可选实施例中,所述处理器1501调用所述存储器1502中存储的程序代码根据所述本BSS的任一站点发送的响应帧的接收情况发送所述下行PPDU或触发帧,可以具体包括:
判断是否在所述竞争成功的当前信道接收到所述本BSS的任一站点发送的响应帧;
若是,通过输入输出模块1503利用所述竞争成功的当前信道向本BSS广播下行PPDU或触发帧。
在可选实施例中,所述处理器1501调用所述存储器1502中存储的程序代码根据所述本BSS的任一站点发送的响应帧的接收情况发送所述 下行PPDU或触发帧,可以具体包括:
判断是否在所述竞争成功的当前信道接收到所述本BSS的任一站点发送的响应帧;所述响应帧中包括对应的站点检测到的所述竞争成功的当前信道的信道状态信息以及该站点的标识;
若在所述竞争成功的当前信道接收到本BSS的站点发送的响应帧,根据所述响应帧中包括的信道状态信息以及站点的标识确定待调度的多个站点;
生成下行PPDU或触发帧,所述下行PPDU或触发帧包括所述待调度的多个站点的调度信息;
通过输入输出模块1503利用所述竞争成功的当前信道向所述本BSS广播包括所述待调度的多个站点的调度信息的下行PPDU或触发帧。
在可选实施例中,所述处理器1501调用所述存储器1502中存储的程序代码通过输入输出模块1503在所述当前信道发送信道竞争包之前,还可以执行以下步骤:
检测所述当前信道的第一信号检测能量;判断所述第一信号检测能量是否小于第一预设门限;若是,执行通过输入输出模块1503在所述当前信道发送信道竞争包的步骤;
所述响应帧为所述本BSS的站点在所述当前信道解析出本BSS的AP发送的信道竞争包,且检测到所述当前信道的信号检测能量小于第一预设门限时,利用所述当前信道向所述本BSS的AP发送的;
所述处理器1501调用所述存储器1502中存储的程序代码通过输入输出模块1503利用所述竞争成功的当前信道向所述本BSS广播下行PPDU或触发帧之前,还可以执行以下操作:
检测所述当前信道的第二信号检测能量;判断所述第二信号检测能量是否小于第二预设门限;所述第二预设门限不同于所述第一预设门限;
若所述第二信号检测能量小于第二预设门限,执行通过输入输出模块1503利用所述竞争成功的当前信道向所述本BSS广播下行PPDU或触发帧的步骤。
需要说明的是,图15所示的AP仅仅标示了AP中用于执行本发明实施例提供的信道竞争方法所需的组件,对于AP能够具备的物理按键、 电源、外壳等其他组件本发明实施例不作标示,因为这不影响本发明实施例的实现。
基于图1所示的系统架构,本发明实施例提供了一种通信装置,该通信装置可以为AP或应用于AP中的处理器,如图16所示,为本发明实施例提供的一种通信装置的结构示意图,可以包括:
信道竞争模块1601,用于判断是否在当前信道解析出本BSS的接入点AP发送的信道竞争包;若是,确定所述本BSS竞争所述当前信道成功;
数据传输模块1602,用于在所述竞争成功的当前信道向所述本BSS的AP发送响应帧,以使所述本BSS的AP在接收到所述响应帧时,利用所述竞争成功的当前信道向所述本BSS广播下行PPDU或触发帧;在所述竞争成功的当前信道接收所述本BSS的AP发送的下行物理层协议数据单元PPDU;当下行PPDU或触发帧中包括针对本站点的调度信息时,根据所述下行PPDU或触发帧中包括的所述针对本站点的调度信息进行上行或者下行数据传输。
考虑到在系统中,每个BSS中会包括多个与该BSS的AP关联的站点,且AP对站点进行时频资源调度之后,站点才能进行上行数据传输,而AP需要成功竞争到信道才能对站点进行时频资源调度,若AP竞争信道失败,则无法对站点进行时频资源调度,从而影响站点的上行数据传输,因此,为了提高系统中的数据传输效率,需要提高AP抢占信道的成功率。
为了达到上述目的,在本发明实施例中,BSS中的站点竞争信道成功时,会将信道使用权转交给AP,即同一BSS中,站点可以帮助AP抢占信道,以提高AP抢占信道的成功率。
本发明实施例中,当AP需要进行数据传输,且未在当前信道解析出本BSS的站点发送的信道竞争包时,AP可以发送信道竞争包,以进行信道竞争。当站点在当前信道解析出本BSS的AP发送的信道竞争包时,确定本BSS竞争当前信道成功。
BSS中任一站点确定在当前信道解析出本BSS的AP发送的信道竞 争包之后,可以在该竞争成功的当前信道向本BSS的AP发送响应帧,以触发本BSS的AP对本BSS的站点进行调度。
本发明实施例中,当AP竞争当前信道成功,且接收到本BSS的站点发送的响应帧时,可以利用该竞争成功的当前信道向本BSS广播包括针对本BSS的多个站点的调度信息的下行PPDU或触发帧。
相应地,数据传输模块1602接收到本BSS的AP发送的下行PPDU或触发帧之后,可以判断该下行PPDU或触发帧中是否包括针对本站点的调度信息,并当包括时,根据该下行PPDU或触发帧中包括的该针对本站点的调度信息进行上行或者下行数据传输。
例如,AP可以在下行PPDU中的SIG域中包括待调度的站点的调度信息,该调度信息可以指示AP为对应的站点分配的时频资源,从而,对应的站点可以根据该时频资源确定接收AP发送的下行数据的时间和频域,或,进行上行数据传输的时间和频域。
在可选实施例中,图16所示的通信装置还可以包括:
信号检测模块1603,用于检测所述当前信道的第一信号检测能量;
相应地,在一种可选实施例中,所述数据传输模块1602,可以具体用于当所述信号检测模块1603检测到的第一信号检测能量小于第一预设门限时,在所述竞争成功的当前信道向所述本BSS的AP发送响应帧。
在该可选实施例中,信道竞争模块1601确定本BSS竞争信道成功时,可以使能信号检测模块1603检测该竞争成功的当前信道的第一信号检测能量;当信号检测模块1603检测到该竞争成功的当前信道的第一信号检测能量小于第一预设门限时,可以使能数据传输模块1602;数据传输模块1602在信号检测模块1603使能后,可以在该竞争成功的当前信道向本BSS的AP发送响应帧,以对该站点的相邻站点产生信号干扰,使该站点的相邻站点检测到的当前信道的信号检测能量增大,从而,可以降低该站点的相邻站点参与竞争该当前信道的概率,实现接收端保护。
在本发明实施例中,AP接收到本BSS的站点发送的响应帧时,可以认为本BSS中存在信道空闲的站点,从而,AP可以对本BSS的站点进行调度,在当前信道向本BSS广播包括针对本BSS的站点的调度信息的下行PPDU;否则,AP可以不对本BSS的站点进行调度。
在另一种可选实施例中,所述数据传输模块1602,可以具体用于当所述信号检测模块1603检测到的第一信号检测能量小于第一信号检测能量时,从所述竞争成功的当前信道中随机选择一个子信道,并利用所述子信道向所述本BSS的AP发送所述响应帧,所述响应帧中包括本站点检测到的所述竞争成功的当前信道的信道状态信息,以及本站点的标识,以使所述本BSS的AP根据接收到的所述响应帧中包括的信道状态信息,以及站点的标识确定待调度的站点。
在该可选实施例中,信道竞争模块1601确定本BSS竞争信道成功时,可以使能信号检测模块1603检测该竞争成功的当前信道的第一信号检测能量;当信号检测模块1603检测到该竞争成功的当前信道的第一信号检测能量小于第一预设门限时,可以使能数据传输模块1602;数据传输模块1602在信号检测模块1603使能后,可以从该竞争成功的当前信道中随机选择一个子信道,并利用该子信道向本BSS的AP发送响应帧,该响应帧中包括本站点检测到的该竞争成功的当前信道的信道状态信息,以及本站点的标识。
AP接收到本BSS的站点发送的响应帧时,可以根据该响应帧中包括的信道状态信息,以及站点的标识,确定待调度的站点,进而,AP可以对本BSS的该待调度的站点进行调度,在当前信道向本BSS广播包括该待调度的站点的调度信息的下行PPDU;否则,AP可以不对本BSS的站点进行调度。
在可选实施例中,所述信号检测模块1603,还可以用于当所述下行PPDU或触发帧中包括针对本站点的调度信息之后,检测所述竞争成功的当前信道的第二信号检测能量;
相应地,所述数据传输模块1602,还可以用于当所述信号检测模块1603检测到的第二信号检测能量小于第二预设门限时,根据所述下行PPDU或触发帧中包括的调度信息进行上行或者下行数据传输。
在可选实施例中,所述信号检测模块1603,可以具体用于检测所述竞争成功的当前信道整个带宽的第二信号检测能量;或,检测所述竞争成功的当前信道中所述PPDU或触发帧中包括的所述针对本站点的调度信息指示的子带的第二信号检测能量。
请参阅图17,图17是本发明实施例提供的一种站点的结构示意图。其中,如图17所示的站点可以包括:总线1704,以及与所述总线互连的处理器1701、存储器1702,以及输入输出模块1703,所述存储器1702中存储有程序代码,且所述处理器1701用于调用所述存储器1702中存储的程序代码,执行以下操作:
判断是否在当前信道解析出本BSS的接入点AP发送的信道竞争包;若是,确定所述本BSS竞争所述当前信道成功;
通过输入输出模块1703在所述竞争成功的当前信道向所述本BSS的AP发送响应帧,以使所述本BSS的AP在接收到所述响应帧时,利用所述竞争成功的当前信道向所述本BSS广播下行PPDU或触发帧;
通过输入输出模块1703在所述竞争成功的当前信道接收所述本BSS的AP发送的下行物理层协议数据单元PPDU;
判断所述下行PPDU或触发帧中是否包括针对本站点的调度信息;
若是,通过输入输出模块1703根据所述下行PPDU或触发帧中包括的所述针对本站点的调度信息进行上行或者下行数据传输。
在可选实施例中,所述处理器1701调用所述存储器1702中存储的程序代码确定所述本BSS竞争所述当前信道成功之后,以及通过输入输出模块1703在所述竞争成功的当前信道向所述本BSS的AP发送响应帧之前,还可以执行以下操作:
检测所述当前信道的第一信号检测能量;
判断所述第一信号检测能量是否小于所述第一预设门限;
若是,执行所述通过输入输出模块在所述竞争成功的当前信道向所述本BSS的AP发送响应帧的步骤。
在可选实施例中,所述处理器1701调用所述存储器1702中存储的程序代码确定所述本BSS竞争所述当前信道成功之后,以及通过输入输出模块1703在所述竞争成功的当前信道向所述本BSS的AP发送响应帧之前,还可以执行以下操作:
检测所述当前信道的第一信号检测能量;
判断所述第一信号检测能量是否小于所述第一预设门限;
若是,执行所述通过输入输出模块1703在所述竞争成功的当前信道向所述本BSS的AP发送响应帧的步骤;
所述通过输入输出模块1703在所述竞争成功的当前信道向所述本BSS的AP发送响应帧,包括:
从所述竞争成功的当前信道中随机选择一个子信道,并通过输入输出模块1703利用所述子信道向所述本BSS的AP发送所述响应帧,所述响应帧中包括本站点检测到的所述竞争成功的当前信道的信道状态信息,以及本站点的标识,以使所述本BSS的AP根据接收到的所述响应帧中包括的信道状态信息,以及站点的标识确定待调度的站点。
在可选实施例中,所述处理器1701调用所述存储器1702中存储的程序代码判断所述下行PPDU或触发帧中包括针对本站点的调度信息之后,以及通过输入输出模块1703根据所述下行PPDU或触发帧中包括的所述针对本站点的调度信息进行上行或者下行数据传输之前,还可以执行以下操作:
检测所述竞争成功的当前信道的第二信号检测能量;
判断所述第二信号检测能量是否小于第二预设门限;所述第二预设门限不同于所述第一预设门限;
若小于,执行通过输入输出模块1703根据所述下行PPDU或触发帧中包括的调度信息进行上行或者下行数据传输。
在可选实施例中,所述处理器1701调用所述存储器1702中存储的程序代码检测所述竞争成功的当前信道的第二信号检测能量,包括:
检测所述竞争成功的当前信道整个带宽的第二信号检测能量;或,
检测所述竞争成功的当前信道中所述PPDU或触发帧中包括的所述针对本站点的调度信息指示的子带的第二信号检测能量。
需要说明的是,图17所示的站点仅仅标示了站点中用于执行本发明实施例提供的信道竞争方法所需的组件,对于站点能够具备的物理按键、电源、外壳等其他组件本发明实施例不作标示,因为这不影响本发明实施例的实现。
在上述实施例中,对各个实施例的描述都各有侧重,某个实施例中没有详述的部分,可以参见其他实施例的相关描述。
所属领域的技术人员可以清楚地了解到,为了描述的方便和简洁,上述描述的系统、装置和单元的具体工作过程,可以参考前述方法实施例中的对应过程,在此不再赘述。
在本申请所提供的几个实施例中,应该理解到,所揭露的装置和方法,可以通过其它的方式实现。例如,以上所描述的装置实施例仅仅是示意性的,例如,所述单元的划分,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式,例如多个单元或组件可以结合或者可以集成到另一个系统,或一些特征可以忽略,或不执行。另外,所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口、装置或单元的间接耦合或通信连接,也可以是电的,机械的或其它的形式连接。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本发明实施例方案的目的。
另外,在本发明各个实施例中的各功能单元可以集成在一个处理单元中,也可以是各个单元单独物理存在,也可以是两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现,也可以采用软件功能单元的形式实现。具体的,可以借助软件加必需的通用硬件的方式来实现,通用硬件包括通用集成电路、通用CPU、通用存储器、通用元器件等,当然也可以通过专用硬件包括专用集成电路、专用CPU、专用存储器、专用元器件等来实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时,可以存储在一个计算机可读取存储介质中。基于这样的理解,本发明的技术方案本质上或者说对现有技术做出贡献的部分,或者该技术方案的全部或部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储介质中,包括若干指令用以使得一台计算机设备(可以是个人计算机,服务器,或者网络设备等)执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储介质包括:U盘、移动硬盘、只读存储器(英文:Read-Only Memory,简称为ROM)、随机存 取存储器(英文:Random Access Memory,简称为RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上对本发明实施例提供的一种信道竞争方法及相关装置进行了详细介绍,本文中应用了具体个例对本发明的原理及实施方式进行了阐述,以上实施例的说明只是用于帮助理解本发明的方法;同时,对于本领域的一般技术人员,依据本发明,在具体实施方式及应用范围上均会有改变之处,综上所述,本说明书内容不应理解为对本发明的限制。

Claims (34)

  1. 一种信道竞争方法,其特征在于,包括:
    接入点判断在当前信道上是否解析出本基本服务集BSS的任一站点发送的信道竞争包;若是,所述接入点确定本BSS竞争所述当前信道成功;
    利用所述竞争成功的当前信道向所述本BSS广播下行物理层协议数据单元PPDU或触发帧,所述下行PPDU或触发帧中包括针对所述本BSS的多个站点的上行或者下行调度信息。
  2. 如权利要求1所述的方法,其特征在于,确定所述本BSS竞争所述当前信道成功之后,以及利用所述竞争成功的当前信道向所述本BSS广播下行PPDU或触发帧之前,还包括:
    记录在预设时间段内解析出在所述竞争成功的当前信道发送信道竞争包的所述本BSS的多个站点的标识;
    所述利用所述竞争成功的当前信道向所述本BSS广播下行PPDU或触发帧,包括:
    确定所述多个站点的标识对应的多个站点的调度信息;
    生成下行PPDU或触发帧,所述下行PPDU或触发帧包括所述多个站点的调度信息;
    利用所述竞争成功的当前信道向所述本BSS广播包括所述多个站点的调度信息的下行PPDU或触发帧。
  3. 如权利要求1或2所述的方法,其特征在于,确定所述本BSS竞争所述当前信道成功之后,以及利用所述竞争成功的当前信道向所述本BSS广播下行PPDU或触发帧之前,还包括:
    统计在预设时间段内解析出的本BSS的站点在所述竞争成功的当前信道发送的信道竞争包;该信道竞争包中包括对应的站点检测到的所述竞争成功的当前信道的信道状态信息;
    所述利用所述竞争成功的当前信道向所述本BSS广播下行PPDU或触发帧,包括:
    根据解析出的信道竞争包中包括的信道状态信息确定待调度的多个站点;
    生成下行PPDU或触发帧,该下行PPDU或触发帧包括所述待调度的多个站点的调度信息;
    利用所述竞争成功的当前信道向所述本BSS广播包括所述待调度的多个站点的调度信息的下行PPDU或触发帧。
  4. 如权利要求1-3任一所述的方法,其特征在于,
    所述信道竞争包是所述站点在需要进行数据传输,且检测到所述当前信道的信号检测能量小于第一预设门限时发送的;
    所述利用所述竞争成功的当前信道向所述本BSS广播下行PPDU或触发帧之前,还包括:
    检测所述竞争成功的当前信道的信号检测能量;判断检测到的所述竞争成功的当前信道的信号检测能量是否小于第二预设门限;所述第二预设门限不同于所述第一预设门限;
    若小于,执行所述利用所述竞争成功的当前信道向本BSS广播下行PPDU或触发帧的步骤。
  5. 如权利要求4所述的方法,其特征在于,所述检测所述竞争成功的当前信道的信号检测能量,包括:
    检测所述竞争成功的当前信道整个带宽的信号检测能量;或,
    检测所述竞争成功的当前信道各子带的信号检测能量。
  6. 如权利要求5所述的方法,其特征在于,当检测所述竞争成功的当前信道各子带的信号检测能量时,所述判断检测到的所述竞争成功的当前信道的信号检测能量是否小于第二预设门限包括:
    判断所述竞争成功的当前信道任一子带的信号检测能量是否小于第二预设门限,若是,则确定检测到的所述竞争成功的当前信道的信号检测能量小于第二预设门限,若否,则确定检测到的所述竞争成功的当前信道的信号检测能量大于或等于第二预设门限。
  7. 一种信道竞争方法,其特征在于,包括:
    当本基本服务集BSS中的任一站点需要进行数据传输,且未在当前信道解析出本BSS的接入点AP发送的信道竞争包时,在所述当前信道发送信道竞争包,以使所述本BSS的AP在所述当前信道解析出所述信道竞争包时,确定本BSS竞争所述当前信道成功;
    在所述竞争成功的当前信道接收所述本BSS的AP发送的下行物理层协议 数据单元PPDU或触发帧;
    判断所述下行PPDU或触发帧中是否包括针对本站点的调度信息;
    若是,根据所述下行PPDU或触发帧中包括的所述针对本站点的调度信息进行上行或者下行数据传输。
  8. 如权利要求7所述的方法,其特征在于,所述信道竞争包中包括所述当前信道的信道状态信息,以使本BSS的AP根据该信道状态信息确定待调度的目标站点。
  9. 如权利要求7或8所述的方法,其特征在于,在所述当前信道发送信道竞争包之前包括:
    检测所述当前信道的第一信号检测能量;
    判断所述第一信号检测能量是否小于第一预设门限;若是,执行在所述当前信道发送信道竞争包的步骤;
    若所述下行PPDU或触发帧中包括针对本站点的调度信息,所述根据所述下行PPDU或触发帧中包括的针对本站点的调度信息进行上行或者下行数据传输之前,还包括:
    检测所述竞争成功的当前信道的第二信号检测能量;判断所述第二信号检测能量是否小于第二预设门限;所述第二预设门限不同于所述第一预设门限;
    若小于,执行根据所述下行PPDU或触发帧中包括的针对本站点的调度信息进行上行或者下行数据传输的步骤。
  10. 如权利要求9所述的方法,其特征在于,所述检测所述竞争成功的当前信道的第二信号检测能量,包括:
    检测所述竞争成功的当前信道整个带宽的第二信号检测能量;或,
    检测所述竞争成功的当前信道中的所述PPDU或触发帧中包括的针对本站点的调度信息指示的子带的第二信号检测能量。
  11. 一种信道竞争方法,其特征在于,包括:
    当接入点需要进行数据传输,且未在当前信道解析出本基本服务集BSS的任一站点发送的信道竞争包时,在所述当前信道发送信道竞争包,以进行信道竞争;
    当确定竞争所述当前信道成功后,根据所述本BSS的任一站点发送的响 应帧的接收情况,利用所述竞争成功的当前信道向所述本BSS广播下行物理层协议数据单元PPDU或触发帧,所述下行PPDU或触发帧中包括针对本BSS的多个站点的调度信息。
  12. 如权利要求11所述的方法,其特征在于,所述根据所述本BSS的任一站点发送的响应帧的接收情况发送所述下行PPDU或触发帧,包括:
    判断是否在所述竞争成功的当前信道接收到所述本BSS的任一站点发送的响应帧;
    若是,利用所述竞争成功的当前信道向本BSS广播下行PPDU或触发帧。
  13. 如权利要求11所述的方法,其特征在于,所述根据所述本BSS的任一站点发送的响应帧的接收情况发送所述下行PPDU或触发帧,包括:
    判断是否在所述竞争成功的当前信道接收到所述本BSS的任一站点发送的响应帧;所述响应帧中包括对应的站点检测到的所述竞争成功的当前信道的信道状态信息以及该站点的标识;
    若在所述竞争成功的当前信道接收到本BSS的站点发送的响应帧,根据所述响应帧中包括的信道状态信息以及站点的标识确定待调度的多个站点;
    生成下行PPDU或触发帧,所述下行PPDU或触发帧包括所述待调度的多个站点的调度信息;
    利用所述竞争成功的当前信道向所述本BSS广播包括所述待调度的多个站点的调度信息的下行PPDU或触发帧。
  14. 如权利要求11-13任一所述的方法,其特征在于,在所述当前信道发送信道竞争包之前包括:检测所述当前信道的第一信号检测能量;判断所述第一信号检测能量是否小于第一预设门限;若是,执行在所述当前信道发送信道竞争包的步骤;
    所述响应帧为所述本BSS的站点在所述当前信道解析出本BSS的AP发送的信道竞争包,且检测到所述当前信道的信号检测能量小于第一预设门限时,利用所述当前信道向所述本BSS的AP发送的;
    所述利用所述竞争成功的当前信道向所述本BSS广播下行PPDU或触发帧之前,还包括:
    检测所述当前信道的第二信号检测能量;判断所述第二信号检测能量是否小于第二预设门限;所述第二预设门限不同于所述第一预设门限;
    若所述第二信号检测能量小于第二预设门限,执行利用所述竞争成功的当前信道向所述本BSS广播下行PPDU或触发帧的步骤。
  15. 一种信道竞争方法,其特征在于,包括:
    基本服务集BSS中的任一站点判断是否在当前信道解析出本BSS的接入点AP发送的信道竞争包;若是,确定所述本BSS竞争所述当前信道成功;
    在所述竞争成功的当前信道向所述本BSS的AP发送响应帧,以使所述本BSS的AP在接收到所述响应帧时,利用所述竞争成功的当前信道向所述本BSS广播下行PPDU或触发帧;
    在所述竞争成功的当前信道接收所述本BSS的AP发送的下行物理层协议数据单元PPDU;
    判断所述下行PPDU或触发帧中是否包括针对本站点的调度信息;
    若是,根据所述下行PPDU或触发帧中包括的所述针对本站点的调度信息进行上行或者下行数据传输。
  16. 如权利要求15所述的方法,其特征在于,所述确定所述本BSS竞争所述当前信道成功之后,以及所述在所述竞争成功的当前信道向所述本BSS的AP发送响应帧之前,还包括:
    检测所述当前信道的第一信号检测能量;
    判断所述第一信号检测能量是否小于所述第一预设门限;
    若是,执行所述在所述竞争成功的当前信道向所述本BSS的AP发送响应帧的步骤。
  17. 如权利要求15所述的方法,其特征在于,所述确定所述本BSS竞争所述当前信道成功之后,以及所述在所述竞争成功的当前信道向所述本BSS的AP发送响应帧之前,还包括:
    检测所述当前信道的第一信号检测能量;
    判断所述第一信号检测能量是否小于所述第一预设门限;
    若是,执行所述在所述竞争成功的当前信道向所述本BSS的AP发送响应帧的步骤;
    所述在所述竞争成功的当前信道向所述本BSS的AP发送响应帧,包括:
    从所述竞争成功的当前信道中随机选择一个子信道,并利用所述子信道向 所述本BSS的AP发送所述响应帧,所述响应帧中包括本站点检测到的所述竞争成功的当前信道的信道状态信息,以及本站点的标识,以使所述本BSS的AP根据接收到的所述响应帧中包括的信道状态信息,以及站点的标识确定待调度的站点。
  18. 如权利要求16或17所述的方法,其特征在于,判断所述下行PPDU或触发帧中包括针对本站点的调度信息之后,以及所述根据所述下行PPDU或触发帧中包括的所述针对本站点的调度信息进行上行或者下行数据传输之前,还包括:
    检测所述竞争成功的当前信道的第二信号检测能量;
    判断所述第二信号检测能量是否小于第二预设门限;所述第二预设门限不同于所述第一预设门限;
    若小于,执行根据所述下行PPDU或触发帧中包括的调度信息进行上行或者下行数据传输。
  19. 如权利要求18所述的方法,其特征在于,
    所述检测所述竞争成功的当前信道的第二信号检测能量,包括:
    检测所述竞争成功的当前信道整个带宽的第二信号检测能量;或,
    检测所述竞争成功的当前信道中所述PPDU或触发帧中包括的所述针对本站点的调度信息指示的子带的第二信号检测能量。
  20. 一种通信装置,所述通信装置为接入点AP或者应用于接入点AP中的处理器,其特征在于,包括:
    信道竞争模块,用于判断在当前信道上是否解析出本基本服务集BSS的任一站点发送的信道竞争包;若是,确定本BSS竞争所述当前信道成功;
    数据传输模块,用于利用所述竞争成功的当前信道向所述本BSS广播下行物理层协议数据单元PPDU或触发帧,所述下行PPDU或触发帧中包括针对所述本BSS的多个站点的上行或者下行调度信息。
  21. 如权利要求20所述的通信装置,其特征在于,
    所述信道竞争模块,还用于确定本BSS竞争所述当前信道成功之后,记录在预设时间段内解析出在所述竞争成功的当前信道发送信道竞争包的所述本BSS的多个站点的标识;
    所述数据传输模块,还用于确定所述多个站点的标识对应的多个站点的调度信息;生成下行PPDU或触发帧,所述下行PPDU或触发帧包括所述多个站点的调度信息;利用所述竞争成功的当前信道向所述本BSS广播包括所述多个站点的调度信息的下行PPDU或触发帧。
  22. 如权利要求20或21所述的通信装置,其特征在于,
    所述信道竞争模块,还用于确定本BSS竞争所述当前信道成功之后,统计在预设时间段内解析出的本BSS的站点在所述竞争成功的当前信道发送的信道竞争包;该信道竞争包中包括对应的站点检测到的所述竞争成功的当前信道的信道状态信息;
    所述数据传输模块,还用于根据解析出的信道竞争包中包括的信道状态信息确定待调度的多个站点;生成包括所述待调度的多个站点的调度信息的下行PPDU或触发帧;利用所述竞争成功的当前信道向所述本BSS广播包括所述待调度的多个站点的调度信息的下行PPDU或触发帧。
  23. 如权利要求20-22任一所述的通信装置,其特征在于,
    所述信道竞争包是所述站点在需要进行数据传输,且检测到所述当前信道的信号检测能量小于第一预设门限时发送的;
    所述通信装置还包括:
    信号检测模块,用于检测所述竞争成功的当前信道的信号检测能量;
    所述数据传输模块,还用于当所述信号检测模块检测到的所述竞争成功的当前信道的信号检测能量第二预设门限时,利用所述竞争成功的当前信道向本BSS广播下行PPDU或触发帧;所述第二预设门限不同于所述第一预设门限。
  24. 如权利要求23所述的通信装置,其特征在于,当所述信号检测模块检测所述竞争成功的当前信道各子带的信号检测能量时,
    所述数据传输模块,具体用于当所述竞争成功的当前信道任一子带的信号检测能量小于第二预设门限时,确定检测到的所述当前信道的信号检测能量小于第二预设门限,否则,确定检测到的所述当前信道的信号检测能量大于或等于第二预设门限。
  25. 一种通信装置,所述通信装置为站点或者应用于站点中的处理器,其特征在于,包括:
    信道竞争模块,用于当所述站点需要进行数据传输,且未在当前信道解析出本基本服务集BSS的接入点AP发送的信道竞争包时,在所述当前信道发送信道竞争包,以使所述本BSS的AP在所述当前信道解析出所述信道竞争包时,确定本BSS竞争所述当前信道成功;
    数据传输模块,用于在所述竞争成功的当前信道接收所述本BSS的AP发送的下行物理层协议数据单元PPDU或触发帧;当所述下行PPDU或触发帧中包括针对本站点的调度信息时,根据所述下行PPDU或触发帧中包括的所述针对本站点的调度信息进行上行或下行数据传输。
  26. 如权利要求25所述的通信装置,其特征在于,所述信道竞争包中包括所述当前信道的信道状态信息,以使本BSS的AP根据该信道状态信息确定待调度的目标站点。
  27. 如权利要求25或26所述的通信装置,其特征在于,所述通信装置还包括:
    信号检测模块,用于检测所述当前信道的第一信号检测能量;
    所述信道竞争模块,具体用于当所述信号检测模块检测到的第一信号检测能量小于第一预设门限时,在所述当前信道发送信道竞争包;
    所述信号检测模块,还用于若所述下行PPDU或触发帧中包括针对本站点的调度信息,检测所述竞争成功的当前信道的第二信号检测能量;
    所述数据传输模块,具体用于当所述信号检测模块检测到的第二信号检测能量小于第二预设门限时,根据所述下行PPDU或触发帧中包括的针对本站点的调度信息进行上行或下行数据传输;所述第二预设门限不同于所述第一预设门限。
  28. 一种通信装置,所述通信装置为接入点AP或者应用于接入点AP中的处理器,其特征在于,包括:
    信道竞争模块,用于当所述AP需要进行数据传输,且未在当前信道解析出本基本服务集BSS的任一站点发送的信道竞争包时,在所述当前信道发送信道竞争包,以进行信道竞争;
    数据传输模块,用于当确定竞争所述当前信道成功后,根据所述本BSS的任一站点发送的响应帧的接收情况,利用所述竞争成功的当前信道向所述本 BSS广播下行物理层协议数据单元PPDU或触发帧,所述下行PPDU或触发帧中包括针对本BSS的多个站点的调度信息。
  29. 如权利要求28所述的通信装置,其特征在于,
    所述数据传输模块,具体用于当在所述竞争成功的当前信道接收到所述本BSS的任一站点发送的响应帧时,利用所述竞争成功的当前信道向本BSS广播所述下行PPDU或触发帧。
  30. 如权利要求28所述的通信装置,其特征在于,
    所述数据传输模块,具体用于当在所述竞争成功的当前信道接收到所述本BSS的站点发送的响应帧时,所述响应帧中包括对应的站点检测到的所述竞争成功的当前信道的信道状态信息以及该站点的标识,根据所述响应帧中包括的信道状态信息以及站点的标识确定待调度的多个站点;生成包括所述待调度的多个站点的调度信息的下行PPDU或触发帧;利用所述竞争成功的当前信道向所述本BSS广播包括所述待调度的多个站点的调度信息的下行PPDU或触发帧。
  31. 如权利要求28-30任一所述的通信装置,其特征在于,所述通信装置还包括:
    信号检测模块,用于检测所述当前信道的第一信号检测能量;
    所述信道竞争模块,具体用于当所述信号检测模块检测到的第一信号检测能量小于第一预设门限时,在所述当前信道发送信道竞争包;
    所述响应帧为所述本BSS的站点在所述当前信道解析出本BSS的AP发送的信道竞争包,且检测到所述当前信道的信号检测能量小于第一预设门限时,利用所述当前信道向所述本BSS的AP发送的;
    所述信号检测模块,还用于检测所述信道的第二信号检测能量;
    所述数据传输模块,具体用于当所述信号检测模块检测到的第二信号检测能量小于第二预设门限时,利用所述竞争成功的当前信道向所述本BSS广播下行PPDU或触发帧;所述第二预设门限不同于所述第一预设门限。
  32. 一种通信装置,所述通信装置为站点或者应用于站点中的处理器,其特征在于,包括:
    信道竞争模块,用于判断是否在当前信道解析出本BSS的接入点AP发送 的信道竞争包;若是,确定所述本BSS竞争所述当前信道成功;
    数据传输模块,用于在所述竞争成功的当前信道向所述本BSS的AP发送响应帧,以使所述本BSS的AP在接收到所述响应帧时,利用所述竞争成功的当前信道向所述本BSS广播下行PPDU或触发帧;在所述竞争成功的当前信道接收所述本BSS的AP发送的下行物理层协议数据单元PPDU;当下行PPDU或触发帧中包括针对本站点的调度信息时,根据所述下行PPDU或触发帧中包括的所述针对本站点的调度信息进行上行或者下行数据传输。
  33. 如权利要求32所述的通信装置,其特征在于,所述通信装置还包括:
    信号检测模块,用于检测所述当前信道的第一信号检测能量;
    所述数据传输模块,具体用于当所述信号检测模块检测到的第一信号检测能量小于第一预设门限时,在所述竞争成功的当前信道向所述本BSS的AP发送响应帧;或者,当所述信号检测模块检测到第一信号检测能量小于第一信号检测能量时,从所述竞争成功的当前信道中随机选择一个子信道,并利用所述子信道向所述本BSS的AP发送所述响应帧,所述响应帧中包括本站点检测到的所述竞争成功的当前信道的信道状态信息,以及本站点的标识,以使所述本BSS的AP根据接收到的所述响应帧中包括的信道状态信息,以及站点的标识确定待调度的站点。
  34. 如权利要求33所述的通信装置,其特征在于,
    所述信号检测模块,还用于当所述下行PPDU或触发帧中包括针对本站点的调度信息之后,检测所述竞争成功的当前信道的第二信号检测能量;
    所述数据传输模块,还用于当所述信号检测模块检测到的第二信号检测能量小于第二预设门限时,根据所述下行PPDU或触发帧中包括的调度信息进行上行或者下行数据传输;所述第二预设门限不同于所述第一预设门限。
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