WO2016033740A1 - 空闲信道评估cca阈值的调整方法和设备 - Google Patents

空闲信道评估cca阈值的调整方法和设备 Download PDF

Info

Publication number
WO2016033740A1
WO2016033740A1 PCT/CN2014/085768 CN2014085768W WO2016033740A1 WO 2016033740 A1 WO2016033740 A1 WO 2016033740A1 CN 2014085768 W CN2014085768 W CN 2014085768W WO 2016033740 A1 WO2016033740 A1 WO 2016033740A1
Authority
WO
WIPO (PCT)
Prior art keywords
concurrent
sta
group
aps
stas
Prior art date
Application number
PCT/CN2014/085768
Other languages
English (en)
French (fr)
Inventor
罗俊
庞继勇
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP14901148.8A priority Critical patent/EP3182784B1/en
Priority to CN201480081584.8A priority patent/CN106664719B/zh
Priority to PCT/CN2014/085768 priority patent/WO2016033740A1/zh
Publication of WO2016033740A1 publication Critical patent/WO2016033740A1/zh
Priority to US15/446,314 priority patent/US10440743B2/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices

Definitions

  • the media access control (MAC) layer of the existing WLAN uses the carrier Sense Multiple Access/Collision Avoidance (CSMA/CA) competition mechanism for data transmission.
  • the transmitting node monitors the energy of the channel before transmitting the data. If the energy of the channel exceeds the CCA threshold, the channel is considered to be busy. If the energy of the channel is lower than the CCA threshold, the channel is considered to be idle. When the channel is idle, the transmitting node performs channel contention.
  • the CCA threshold can be increased and the transmission opportunity of the link can be improved. However, in an actual communication system, increasing the CCA threshold may reduce the throughput of the system.
  • the embodiments of the present invention provide a method and a device for adjusting a CCA threshold of an idle channel, which can improve the throughput of the system.
  • a first aspect of the present invention provides a method for adjusting a CCA threshold of an idle channel, including:
  • the access point AP determines the concurrent STAs that join the concurrent group from all the associated STAs, and generates the concurrent group information of the concurrent group.
  • the concurrent group information includes the identifier of the AP and the identifier of the concurrent STA associated with the AP. And the concurrent time of the concurrent group;
  • the AP sends a notification message to the associated concurrent STA, where the notification message includes the concurrency time and a target CCA threshold of the concurrent STA associated with the AP, where the notification message is used to notify the concurrent STA associated with the AP.
  • the target CCA threshold for channel competition in the concurrent time
  • the AP sends the concurrent group information to other APs in the system except the AP.
  • the determining, by the AP, the concurrent STAs that join the concurrent group from all the associated STAs including:
  • the AP measures received signal strengths of all associated STAs to the AP
  • the AP selects one or more STAs with the strongest signal strength from among all the associated STAs as the concurrent STAs of the AP.
  • the concurrent group information further includes The identifier of the concurrent group.
  • the first access point AP receives the concurrent group information of the concurrent group, and the concurrent group information includes: an identifier of each second AP that has joined the concurrent group, and an identifier and a location of the concurrent site STA associated with each second AP.
  • the first AP determines, according to the identifier of each second AP, the concurrent STAs that join the concurrent group from all the STAs associated with the first AP;
  • the first AP updates the concurrent group information, where the updated concurrent group information includes an identifier of the first AP and an identifier of a concurrent STA associated with the first AP, and the updated concurrent group
  • the information is sent to other APs in the system than the first AP.
  • the first AP determines, according to the identifier of the concurrent STA that is associated with the second AP, whether to join the concurrent group, including :
  • the first AP determines whether the received signal strength of the concurrent STAs associated with the second APs is smaller than a received signal strength threshold corresponding to the concurrent STAs associated with the second APs that are set in advance;
  • the first AP sends a measurement indication message to all the associated STAs, where the measurement indication message includes an identifier of each second AP, where the measurement indication message is used to indicate that all STA measurements associated with the first AP are from Received signal strength of each of the second APs;
  • the concurrent group information includes maximum concurrency And the number of the service set, the first AP, before the first AP determines whether to join the concurrent group according to the identifier of the concurrent STA associated with the second AP, the method further includes:
  • the first AP determines whether to join the identifier according to the identifier of the concurrent STA associated with each second AP. Concurrent group.
  • a fourth possible implementation manner of the second aspect of the present invention if the number of the second APs that have joined the concurrent group is equal to the The maximum number of concurrent service sets, the first AP stops joining the concurrent group.
  • the method further includes:
  • the first AP determines whether to join the concurrent group according to the identifier of the concurrent STA associated with each second AP.
  • the first AP determines whether the current time has reached the concurrent time, and further includes :
  • the first AP stops joining the concurrent group.
  • the concurrent group information further includes: The identifier of the concurrent group.
  • a third aspect of the present invention provides a method for adjusting a CCA threshold of an idle channel, including:
  • the STA receives the notification message sent by the access point AP, where the STA is a concurrent STA associated with the AP, and the notification message is sent by the AP to the STA after determining that the STA joins the concurrent group.
  • the notification message includes a concurrency time of the concurrent group and a target CCA threshold of the STA;
  • the STA performs channel contention using the target CCA threshold in the concurrent time according to the notification message.
  • the method before the receiving, by the site STA, the notification message sent by the access point AP, the method further includes:
  • the STA Receiving, by the STA, a measurement indication message sent by the AP, where the measurement indication message includes an identifier of each second AP that has joined the concurrent group, where the measurement indication message is used to indicate that the STA measures from each Received signal strength of the second AP;
  • the STA measures the received signal strengths from the second APs according to the identifiers of the second APs included in the measurement indication message;
  • the STA sends the received signal strengths from the second APs to the AP, so that the AP determines whether the STA joins the concurrent group according to received signal strengths from the second APs.
  • a fourth aspect of the present invention provides an access point AP, including:
  • a determining module configured to determine, from all station STAs associated with the AP, a concurrent STA that joins the concurrent group;
  • a generating module configured to generate concurrent group information of the concurrent group, where the concurrent group information includes an identifier of the AP, an identifier of a concurrent STA associated with the AP, and a concurrent time of the concurrent group;
  • a sending module configured to send a notification message to the concurrent STA associated with the AP, where the notification message includes the concurrent time and a target CCA threshold of the concurrent STA associated with the AP, where the notification message is used to notify the AP
  • the associated concurrent STA uses the target CCA threshold for channel contention during the concurrent time;
  • the sending module is further configured to send the concurrent group information to other APs in the system except the AP.
  • the determining module is specifically configured to:
  • One or more STAs with the strongest received signal strength are selected from all STAs associated with the AP as concurrent APs of the AP.
  • the concurrent group information further includes a maximum concurrent service set And the number of the maximum number of concurrent service sets is used to indicate that the other AP stops joining the concurrent group when determining that the number of service sets that have been joined in the concurrent group reaches the maximum number of concurrent service sets.
  • the concurrent group information further includes The identifier of the concurrent group.
  • a fifth aspect of the present invention provides an access point AP, where the AP is a first AP, and the first AP includes:
  • a receiving module configured to receive the concurrent group information of the concurrent group, where the concurrent group information includes: an identifier of each second AP that has joined the concurrent group, an identifier of the concurrent site STA associated with each second AP, and the Concurrency time of concurrent groups;
  • a first determining module configured to determine whether to join the concurrent group according to the identifier of the concurrent STA associated with each second AP indicated by the concurrent group information
  • a second determining module if the first determining module determines that the first AP determines to join the concurrent group, and determines to join from all STAs associated with the first AP according to the identifier of each second AP The concurrent STA of the concurrent group;
  • a sending module configured to send a notification message to the concurrent STA associated with the first AP, where the notification message includes the concurrency time and a target CCA threshold of the concurrent STA associated with the first AP, and the second notification message
  • a concurrent STA configured to notify the first AP to use the target CCA threshold for channel competition in the concurrent time
  • An update module configured to update the concurrent group information, where the updated concurrent group information includes an identifier of the first AP and an identifier of a concurrent STA associated with the first AP;
  • the sending module is further configured to send the updated concurrent group information to other APs in the system except the first AP.
  • the received signal strengths of the concurrent STAs associated with the second APs are respectively measured according to the identifiers of the concurrent STAs associated with the second APs;
  • the second determining module is specifically configured to:
  • the identifier includes the identifiers of the second APs, where the measurement indication message is used to indicate that all STAs associated with the first AP measure received signal strengths from the second APs;
  • One or more STAs act as concurrent STAs of the first AP.
  • the concurrent group information includes maximum concurrency
  • the first determining module is further configured to:
  • the first determining module determines that the first AP stops joining the concurrent group.
  • the first determining module is further used to :
  • the first determining module Determining that the first AP stops joining the concurrent group.
  • the concurrent group information further includes: The identifier of the concurrent group.
  • a sixth aspect of the present invention provides a station STA, including:
  • a receiving module configured to receive a notification message sent by the access point AP, where the STA is a concurrent STA associated with the AP, the notification message is sent by the AP to the STA after determining that the STA joins the concurrent group, where the notification message includes the concurrent time of the concurrent group and the STA Target CCA threshold;
  • a contention module configured to perform channel contention using the target CCA threshold in the concurrent time according to the notification message.
  • the receiving module is further configured to: receive a measurement indication message sent by the AP, where the measurement indication message includes An identifier of each second AP of the concurrent group, where the measurement indication message is used to instruct the STA to measure received signal strengths from the second APs;
  • the STA further includes:
  • a sending module configured to send, to the AP, a received signal strength from each of the second APs, so that the AP determines whether the STA joins the concurrent group according to received signal strengths from the second APs.
  • a seventh aspect of the present invention provides an access point AP communication apparatus, including: a processor, a memory and a communication interface, and a system bus, wherein the memory and the communication interface are connected to and communicate with the processor through the system bus;
  • the communication interface is configured to communicate with other devices
  • Computer-executable instructions are stored in the memory
  • the processor configured to execute the computer to execute instructions, to cause the communication device to perform any of the first aspect of the present invention and the first to third possible implementation manners of the first aspect of the present invention method.
  • An eighth aspect of the present invention provides an access point AP communication device, where the AP is a first AP, and the first AP includes: a processor, a memory, a communication interface, and a system bus, where the memory and the communication interface pass The system bus is connected to and communicates with the processor;
  • the communication interface is configured to communicate with other devices
  • a computer execution instruction is stored in the memory
  • the processor configured to execute the computer to execute instructions, to cause the communication device to perform the second aspect of the present invention and the first to seventh possible implementation manners of the second aspect of the present invention A method as described.
  • a ninth aspect of the present invention provides a communication apparatus, including: a processor, a memory, and a communication interface, wherein the memory and the communication interface are connected and communicate with the processor;
  • the communication interface is configured to communicate with other devices
  • a computer execution instruction is stored in the memory
  • the processor is configured to execute the computer to execute instructions to cause the communication device to perform the method of any of the first aspect of the invention and the first possible implementation of the first aspect of the invention.
  • the AP determines the concurrent STAs that join the concurrent group from all the associated STAs, and then generates the concurrent group information of the concurrent group, where the concurrent group information includes The identifier of the AP, the identifier of the concurrent STA associated with the AP, and the concurrent time of the concurrent group; the AP sends the concurrent group information to other APs in the system except the AP, so that The BSSs described by the other APs determine to join the concurrent group according to the concurrent group information, and finally form the concurrent group.
  • All concurrent STAs joining the concurrent group use the increased target CCA threshold for channel contention in the concurrent time to increase the possibility of sending data themselves, thereby improving the throughput of the system, and all the APs associated with the concurrent group are associated.
  • the STA and the non-concurrent STAs associated with the APs in the concurrent group do not raise the CCA threshold, and use the lower normal CCA threshold for channel contention.
  • the number of concurrent links can be controlled by controlling the number of BSSs in the concurrent group. Thereby, interference between concurrent links can be reduced, and system throughput is further improved.
  • FIG. 1 is a flowchart of a method for adjusting a CCA threshold according to Embodiment 1 of the present invention
  • FIG. 2 is a schematic structural diagram of a notification message
  • FIG. 3 is a flowchart of a method for adjusting a CCA threshold according to Embodiment 2 of the present invention.
  • 5 is a schematic structural diagram of a measurement indication message
  • Embodiment 6 is a schematic structural diagram of Embodiment 3 of a method for adjusting a CCA threshold according to the present invention.
  • FIG. 7 is a schematic flowchart of a process of forming a concurrent group according to Embodiment 4 of the present invention.
  • Embodiment 8 is a schematic structural diagram of a system used in Embodiment 4 of the present invention.
  • FIG. 9 is a schematic structural diagram of an AP according to Embodiment 5 of the present invention.
  • FIG. 10 is a schematic structural diagram of an AP according to Embodiment 6 of the present invention.
  • FIG. 12 is a schematic structural diagram of an AP communication apparatus according to Embodiment 8 of the present invention.
  • FIG. 13 is a schematic structural diagram of a first AP communication apparatus according to Embodiment 9 of the present invention.
  • FIG. 14 is a schematic structural diagram of a communication apparatus according to Embodiment 10 of the present invention.
  • the STA can be mobile or fixed, and the STA is the most basic component of the wireless local area network.
  • the STA associated with the AP is the STA within the coverage of the wireless signal of the AP.
  • the AP and a plurality of STAs associated with the AP form a basic service set (BSS), and the plurality of BSSs constitute a wireless network system.
  • BSS basic service set
  • the current CCA threshold is adjusted according to the corrected PER value, and the real
  • the effective collision PER value dynamically adjusts the CCA threshold to adapt to changes in different environments and improves network throughput and quality of service.
  • system throughput can be increased to some extent.
  • a solution of the embodiment of the present invention establishes a concurrent group, and each AP selects a STA from all the associated STAs to join the concurrent group, and all the concurrent STAs associated with the APs in the concurrent group are in the concurrent time.
  • the concurrency group referred to in various embodiments of the present invention refers to a collection of communication devices that can communicate using the same communication resources at the same time.
  • Concurrent communication means that all concurrent STAs in a concurrent group can communicate using the same communication resource at the same time.
  • the communication resource specifically refers to a channel, for example, a channel using a specific communication frequency, wherein the concurrent communication can be between the STA and the STA.
  • the communication or the communication between the STA and the AP, and the communication between the STA and the STA also needs to pass through the AP.
  • the AP is the creator of the concurrent group.
  • the method in this embodiment may include the following steps:
  • Step 101 The AP determines the concurrent STAs that join the concurrent group from all the associated STAs, and generates the concurrent group information of the concurrent group.
  • the concurrent group information includes the identifier of the AP, the identifier of the concurrent STA associated with the AP, and the concurrent group. Concurrency time.
  • the AP selects the concurrent STAs of the concurrent group from all the STAs that are associated with the AP.
  • the AP can select one or more STAs to join the concurrent group.
  • the number of concurrent STAs selected by the AP can be pre-agreed.
  • the AP may select randomly, or select according to the order of priority of each STA, and preferentially select STAs with high priority as The STA is sent, or the AP measures the received signal strength of all the associated STAs to the AP. Then, one or more STAs with the strongest or strongest received signal strength are selected as the concurrent STAs of the AP from all the STAs associated with the AP.
  • the AP joins the concurrent STA to the concurrent group to generate the concurrent group information of the concurrent group.
  • the concurrent group information includes the identifier of the AP, the identifier of the concurrent STA associated with the AP, and the concurrent time.
  • the concurrent group information may also include the concurrent group identifier.
  • the concurrent groups are distinguished by the concurrent group identifier.
  • the concurrent time of each concurrent group is different, and the concurrent time of each concurrent group cannot be Overlap, one AP or STA can join multiple concurrent groups, and the concurrent STAs associated with APs joining the concurrent groups can communicate concurrently during the concurrent time.
  • Step 102 The AP sends a notification message to the associated concurrent STA, where the notification message includes a concurrency time and a target CCA threshold of the concurrent STA associated with the AP, where the notification message is used to notify the concurrent STA associated with the AP to use the concurrent STA.
  • the target CCA threshold is used for channel contention.
  • the notification message includes: a first field, which is a concurrent group identifier; a second field, which is an identifier of a concurrent STA associated with the AP; and a third field, which is a concurrent time.
  • the fourth field is the target CCA threshold of the concurrent STA. The order of these fields may be different in a specific example, and some of the fields may be multiplexed in some form.
  • the target CCA thresholds of multiple concurrent STAs may be the same or different, and the AP may set different target CCA thresholds according to the condition of each concurrent STA.
  • the target CCA can be calculated by the AP using existing algorithms based on historical system throughput.
  • the target CCA threshold is a static value, that is, all concurrent STAs use the target CCA threshold in a concurrent time.
  • the AP in each BSS can dynamically adjust the target CCA threshold. For example, all concurrent STAs adjust the CCA threshold to the target CCA threshold carried in the concurrent group message at the start time of the concurrent time.
  • the target CCA threshold carried in the concurrent group message is used as the initial target CCA threshold.
  • the initial target CCA threshold is uniformly increased by a certain value. Then, each AP calculates the BSS throughput, and if the initial target CCA threshold is increased, the entire system is updated. The throughput is increased, then the initial target CCA threshold is raised to the adjusted target CCA threshold, and similarly, continue Increasing the value of the target CCA threshold until the system throughput cannot be increased.
  • the concurrent STA increases the CCA threshold to the target CCA threshold, and the concurrent STA uses the target CCA threshold for channel contention in the concurrent time.
  • the concurrent STA uses the target CCA threshold for channel contention in the concurrent time.
  • other STAs in the system except the concurrent STAs do not raise the CCA threshold.
  • all concurrent STAs restore the CCA threshold to the normal value.
  • each concurrent STA must perform carrier sensing before transmitting data. If it detects that the current channel energy exceeds the target CCA threshold, the current channel is indicated.
  • the current channel is idle, and each concurrent STA performs channel competition.
  • a STA in a BSS adopts a CSMA/CA contention mechanism when performing channel competition, and finally only one of the plurality of concurrent STAs associated with the AP can compete for the channel.
  • other non-concurrent STAs use the smaller normal CCA threshold for CSMA/CA contention, and the chance of competing for the channel is generally smaller than the aforementioned concurrent STA.
  • the STAs in multiple BSSs joining the concurrent group can simultaneously perform channel contention at the concurrent time, and the concurrent STAs competing to the channel can concurrently communicate in the concurrent time.
  • the STA In the CSMA/CA mechanism, after the STA hears that the channel is idle, the STA randomly waits for a time, then broadcasts a Request to Send (RTS) frame, and the RTS frame contains a network allocation vector (Network Allocation Vector). , referred to as the NAV) field and a receiving address.
  • NAV Network Allocation Vector
  • an AP in the network system receives the RTS frame, if the receiving address in the RTS is different from its own Media Access Control (MAC) address, no response is made, but the NAV period is set. No data is sent inside. If an AP receives the RTS frame and the received address in the RTS frame is the same as its own MAC address, the broadcast transmission grant is sent after the RTS ends the Short Interframe Space (SIFS).
  • SIFS Short Interframe Space
  • the receiving address of the CTS frame is the sending address of the RTS frame
  • the CTS frame also carries the NAV.
  • the NAV carried in the CTS frame is equal to the NAV carried in the RTS frame minus the transmission time of the CTS frame minus the transmission time of the CTS and the SIFS.
  • the STA that receives the CTS frame does not send data in the NAV period carried in the CTS frame if the receiving address is different from its own address. If the address of the STA is the same as its own address, the STA contends to the channel. Data can be transmitted during the NAV period carried in the CTS frame.
  • STA1 first sends an RTS frame to AP1. After receiving the RTS frame, AP1 broadcasts the CTA frame. All STAs associated with AP1 can receive the CTS. After receiving the CTS frame, STA2 receives the CTS frame. No data is sent, and only STA1 transmits data during the concurrent time.
  • Step 103 The AP sends the concurrent group information to other APs in the system except the AP.
  • the AP communicates or can communicate with other STAs through its associated AP.
  • Each concurrent STA that contends to the channel can use the channel concurrent communication during the initiation time, that is, all concurrent STAs competing for the channel can use the channel for communication at the same time.
  • the interference between the concurrent STAs is small.
  • All concurrent STAs in the concurrent group use the increased target CCA threshold for channel contention in the concurrent time, and the out-of-group STAs use the normal CCA threshold for channel contention, where the normal CCA threshold means that the previous CCA threshold is not raised.
  • joining all concurrent STAs in the concurrent group reduces the CCA threshold from the target CCA threshold to the normal CCA threshold outside the concurrent time.
  • the throughput of the system can be improved, and all the STAs associated with the APs outside the concurrent group and the non-concurrent STAs associated with the APs in the concurrent group do not raise the CCA threshold, and use a lower normal.
  • the CCA threshold performs channel contention, so that the number of concurrent links can be controlled by controlling the number of BSSs in the concurrent group, which limits the number of concurrent links in the system. The number can be used to reduce interference between concurrent links and further improve system throughput.
  • the concurrent group information may further include a maximum number of concurrent service sets, where the maximum number of concurrent service sets is used to indicate that the number of service sets that other APs have joined in determining the concurrent group reaches When the maximum number of concurrent service sets is reached, the concurrent group is not added.
  • an AP receives the concurrent group information sent by the other AP, first, it is determined whether the number of the concurrent service group that has been added to the AP is smaller than the maximum number of concurrent service sets. Specifically, the AP receives the concurrent group information. The number of the APs that have joined the concurrent group. The number of APs that have joined the concurrent group is equal to the number of APs that have joined the concurrent group.
  • the number of APs that have joined the concurrent group is equal to the number of APs that have joined the concurrent group. Therefore, the AP can compare the number of APs that have joined the concurrent group with the number of the largest concurrent service sets included in the concurrent group information. If the number of the concurrent service set has been less than the maximum number of concurrent service sets, the AP further associates with the APs that have joined the concurrent group in the concurrent group information and the APs that have joined the concurrent group.
  • the identity of the concurrent STA further determines whether it joins the concurrent group; if the number of service sets that have joined the concurrent group is equal to the maximum number of concurrent service sets, indicating that the concurrent group is full, the AP stops trying to join the concurrent group. That is, the AP does not continue to perform the subsequent operations: further determining whether to join the concurrent group according to the identity of each AP that has joined the concurrent group in the concurrent group information and the identity of the concurrent STA associated with each AP that has joined the concurrent group.
  • the concurrent group information may not carry the maximum number of concurrent service sets.
  • an AP receives the concurrent group information sent by other APs, it determines whether the current time has reached the concurrent time. If the concurrent time is not reached, then the description is The AP has the opportunity to join the concurrent group. The AP further determines whether to join the concurrent group according to the identifier of each AP that has joined the concurrent group and the identifier of the concurrent STA associated with each AP that has joined the concurrent group. The concurrent time, the AP stops trying to join the concurrent group, that is, the AP does not continue to perform subsequent operations: according to the identity of each AP that has joined the concurrent group in the concurrent group information, and the concurrent association of each AP that has joined the concurrent group. The STA's identity further determines whether or not it joins the concurrent group.
  • the first embodiment is to illustrate the solution of the embodiment of the present invention from the perspective of the creator of the concurrent group.
  • the second embodiment of the present invention will specifically describe the solution of the embodiment of the present invention from the perspective of the participant of the concurrent group, and
  • FIG. 3 is an implementation of the present invention.
  • a flowchart of a method for adjusting a CCA threshold value provided in the second embodiment, as shown in FIG. 3, the method of the present implementation may include the following steps:
  • Step 201 The first AP receives the concurrent group information of the concurrent group, where the concurrent group information includes: The identifier of each second AP that joins the concurrent group, the identifier of the concurrent STA associated with each second AP, and the concurrent time of the concurrent group.
  • the concurrent group information includes: a first field, which is an identifier of a concurrent group; a second field, an identifier of the second AP; and a third field, which is a second The identifier of the concurrent STA associated with the second AP included in the field.
  • the fields in FIG. 4 have a certain order. The order of the fields represents the order of the APs and STAs joining the concurrent group, and so on, when there are more APs.
  • the added AP and the associated concurrent STA are sequentially written into the corresponding fields, and the last field of the concurrent group information is the concurrent time of the concurrent group.
  • Step 202 The first AP determines whether to join the concurrent group according to the identifier of the concurrent STA associated with each second AP indicated by the concurrent group information.
  • the first AP may determine whether to join the concurrent group according to the following manner:
  • the first AP measures the received signal strengths of the concurrent STAs associated with the second APs according to the identifiers of the concurrent STAs associated with the second APs.
  • the received signal strengths of the concurrent STAs associated with the second APs are specifically the received signal strengths of the data transmitted by the associated STAs of the second AP received by the first AP.
  • the first AP needs to measure the received signal strengths of the concurrent STAs associated with all the second APs.
  • the first AP measures the received signal strength from the concurrent STAs associated with each second AP, specifically, when the concurrent AP associated with the second AP sends data to the second AP, the first AP can also detect The data sent by the concurrent STA associated with the second AP, the first AP uses the power of the received signal of the data sent by the concurrent STA associated with the second AP as the received signal strength.
  • the first AP determines whether the received signal strength of the concurrent STAs associated with the second APs is smaller than a received signal strength threshold corresponding to the concurrent STAs associated with each second AP.
  • the first AP determines whether to join the concurrent group according to the strength of the received signal of all the concurrent STAs that have joined the concurrent group. When all the concurrent STAs that have joined the concurrent group have their received signal strengths smaller than the received signal strength threshold, the All the concurrent STAs that join the concurrent group have little interference to the first AP. After the first AP joins the concurrent group, normal data transmission and reception can be performed without interference from concurrent STAs that have joined the concurrent group. When the received signal strength of one of the concurrent STAs associated with the second AP to the first AP does not satisfy the above conditions, The concurrent AP that meets the condition has a large interference to the first AP. If the first AP joins the concurrent group, the concurrent STA that does not meet the condition will interfere with the normal data transmission and reception of the first AP. Therefore, the first AP does not join the concurrent group. .
  • the received signal strength threshold corresponding to the concurrent STAs associated with each second AP may be set in the following three manners: In the first mode, the received signal strength thresholds corresponding to the concurrent STAs associated with all the second APs are the same, that is, Set a uniform received signal strength threshold. In the second mode, a received signal strength threshold may be set for each second AP, and the received signal strength thresholds of different second APs may be different, but the received signal strength thresholds of multiple concurrent STAs associated with each second AP are the same. In the third mode, the received signal strength thresholds corresponding to the concurrent STAs associated with all the second APs are separately set, and the received signal strengths corresponding to the multiple concurrent STAs associated with each second AP may also be different.
  • the first AP may obtain the first AP to the first AP according to the identifier of the concurrent STA associated with each second AP.
  • the distance of the concurrent STAs associated with each second AP determines whether to join the concurrent group according to the distance between the first AP and the concurrent STAs associated with the second AP.
  • Step 203 If the first AP determines to join the concurrent group, the first AP determines, according to the identifier of each second AP, the concurrent STAs that join the concurrent group from all the STAs associated with the first AP.
  • the first AP sends a measurement indication message to all the associated STAs, where the measurement indication message includes an identifier of each second AP, where the measurement indication message is used to indicate that all STAs associated with the first AP measure the reception from each second AP. Signal strength.
  • FIG. 5 is a schematic structural diagram of a measurement indication message.
  • the first field in the measurement indication message is an identifier of a concurrent group
  • the second field is an identifier of AP1
  • the third field is AP2.
  • the identification of AP1 and AP2 is the second AP.
  • the measurement indication message can be carried in a beacon or a probe response.
  • all the STAs associated with the first AP After receiving the measurement indication message, all the STAs associated with the first AP respectively measure the received signal strengths from AP1 and AP2 according to the identifiers of AP1 and AP2, that is, each STA associated with the first AP needs to measure two received signals. strength.
  • the first AP receives the received signal strengths from the second APs returned by all the associated STAs, where the strength of the received signals may specifically be the received signals from the second APs. Receive power.
  • One or more STAs having a smaller received signal strength from each second AP are selected as the concurrent STAs of the first AP from all the STAs associated with the first AP.
  • each STA associated with the first AP needs to send the strength of the received signal that is measured by itself to the first AP, and the first AP selects according to the measurement result of all STAs. Specifically, the first AP will STA.
  • the measured received signal strengths from the respective second APs are respectively compared with a preset threshold value, and the STAs whose received signal strengths from the respective second APs are all smaller than the preset threshold value are selected as the concurrent STAs.
  • the first AP uses multiple STAs whose received signal strengths from the second APs are less than a preset threshold. The STA is selected, and then the first AP selects, from the candidate STA, one or more STAs having the smallest received signal strength from each of the second APs as the concurrent STA.
  • each STA associated with the first AP compares the measured received signal strengths from the second APs with a preset threshold, respectively, when the received signals from the second APs are received. When the strength is less than the preset threshold, the STA reports the measurement result to the first AP. When one of the received signal strengths from the second APs is not less than the preset threshold, the STA does not go to the first. An AP reports the measurement result.
  • the first AP may use, as the concurrent STA, all the STAs that have received the received signal strengths from the second APs that are less than the preset threshold.
  • the first AP may use all the reported STAs as the candidate STAs, and then the first AP selects the smallest received signal strength from each of the second APs from the candidate STAs. Or multiple STAs as concurrent STAs.
  • the first AP fails to join the concurrent group.
  • the first AP selects, according to the second AP to the STA, the received signal strength, the STA with the small received signal strength as the concurrent STA, and the smaller the received signal strength of the second AP to the STA, indicating that the second AP is to the STA.
  • the smaller the interference For example, when determining the concurrent STAs, each AP selects the STA with the smallest received signal strength to reduce the interference between the concurrent STAs.
  • the concurrent STAs in the concurrent group have little interference when transmitting data at the same time, thereby improving the throughput of the entire system. the amount.
  • the number of concurrent links in the system is large, and the interference between the concurrent links is large.
  • only the concurrent groups in the concurrent group are concurrent.
  • the STA increases the CCA threshold in the concurrent time, thereby limiting the number of concurrent links in the system and reducing interference between concurrent links, thereby improving system throughput.
  • Step 204 The first AP sends a notification message to the associated concurrent STA, where the notification message includes a target CCA threshold of the concurrent STA associated with the first AP, and the second notification message is used to notify the concurrent STA associated with the first AP.
  • the target CCA threshold is used for channel contention during concurrent time.
  • the target CCA thresholds of each concurrent STA may be the same or different.
  • Step 205 Update the concurrent group information, where the updated concurrent group information includes the identifier of the first AP and the identifier of the concurrent STA associated with the first AP, and send the updated concurrent group information to the system except the first AP. Other APs outside.
  • the first AP sends the updated concurrent group information to other APs in the system, so that other APs select to join the concurrent group according to the updated concurrent group information, and all concurrent STAs in the concurrent group are at the start time of the concurrent time.
  • the CCA threshold is raised to the target CCA threshold, and the concurrent STA uses the target CCA threshold for channel contention in the concurrent time.
  • STAs that use the target CCA threshold for channel contention generally have a greater chance of competing for the channel than STAs that use the smaller normal CCA threshold for channel contention.
  • the concurrent STAs competing to the channel can use the concurrent channel concurrent communication in the concurrent time, and the concurrent communication can be the communication between the STA and the STA or the communication between the STA and the AP.
  • the first AP determines, according to the received concurrent group information, whether it joins the concurrent group. If the first AP determines that it joins the concurrent group, the first AP further determines the concurrent STAs that join the concurrent group from all the associated STAs. The concurrent group information is updated, and the updated concurrent group information is sent to other APs in the system to form a concurrent group. All concurrent STAs associated with the APs in the concurrent group use the increased target CCA threshold for channel contention in the concurrent time to increase the possibility of transmitting data by itself, thereby improving the throughput of the system, and concurrently outside the concurrent group. All STAs associated with an AP and non-concurrent STAs associated with APs in a concurrent group are not promoted.
  • the CCA threshold is used to perform channel contention using a lower normal CCA threshold.
  • the number of concurrent links can be controlled, which limits the number of concurrent links in the system, thereby reducing the number of concurrent links. Interference between concurrent links further improves system throughput.
  • the step 202 further includes the following steps: the first AP determines whether the number of the second APs that have joined the concurrent group is less than the maximum number of concurrent service sets, and the maximum number of concurrent service sets. The number is carried in the concurrent group information. If the number of the second APs that have joined the concurrent group is less than the maximum number of concurrent service sets, the first AP performs step 202. If the number of the second APs that have joined the concurrent group is equal to the maximum number of concurrent service sets, the first AP stops trying to join the concurrent group, that is, the first AP does not perform the steps after step 202 and step 202.
  • the step 202 includes the following steps: the first AP determines whether the current time has reached the concurrent time; if the current time does not reach the concurrent time, the first AP performs step 202, and if the current time reaches the concurrent time, the first The AP stops trying to join the concurrent group, that is, the first AP does not perform the steps after step 202 and step 202.
  • FIG. 6 is a schematic structural diagram of Embodiment 3 of a method for adjusting a CCA threshold according to the present invention.
  • a method for adjusting a CCA threshold is specifically described from a STA.
  • the method in this embodiment includes the following steps:
  • Step 301 The STA receives the notification message sent by the AP, where the STA is a concurrent STA associated with the AP, and the notification message is sent by the AP to the STA after determining that the STA joins the concurrent group, and the notification message includes the concurrent time of the concurrent group and the STA.
  • Target CCA threshold the STA receives the notification message sent by the AP, where the STA is a concurrent STA associated with the AP, and the notification message is sent by the AP to the STA after determining that the STA joins the concurrent group, and the notification message includes the concurrent time of the concurrent group and the STA.
  • the STA raises its own CCA threshold to the target CCA threshold at the start time of the concurrent time according to the notification message sent by the AP, and all the concurrent STAs in the concurrent group use the target CCA threshold in the concurrent time.
  • the concurrent STAs associated with other APs participating in the concurrent group also use their own target CCA thresholds for channel contention during the concurrent time.
  • the STAs that use the target CCA threshold for channel competition generally have a greater chance of competing for the channel than the smaller ones.
  • STAs with normal CCA thresholds for channel contention The concurrent STAs competing to the channel can concurrently communicate using the contention channel in the concurrent time, and the concurrent communication can be communication between the STA and the STA or communication between the STA and the AP.
  • the concurrent STA associated with the AP further includes: before the step 301, the STA receives the measurement indication message sent by the AP, where the measurement indication message is used to indicate the STA measurement.
  • the received signal strength from each of the second APs after the STA is completed, in one mode, the STA sends the received signal strengths from the second APs to the APs, and the AP determines the received signal strengths from the second APs.
  • the STA joins the concurrent group. In another mode, the STA determines whether to join the concurrent group. If the STA determines to join the concurrent group, the STA reports the received signal strength from each second AP to the AP.
  • FIG. 7 is a schematic flowchart of a process of forming a concurrent group according to Embodiment 4 of the present invention.
  • FIG. 8 is a schematic structural diagram of a system used in Embodiment 4 of the present invention. As shown in FIG. 8, the system includes three BSSs, each of which is BSS. The AP selects a concurrent STA to join the concurrent group. As shown in FIG. 7, the method of this embodiment includes the following steps:
  • the concurrent group information includes a representation of AP1, an identifier of STA1, and a concurrency time.
  • Step 402 The AP1 sends a notification message to the STA1 to notify the STA1 to perform channel competition using the target CCA threshold corresponding to the STA1 in the concurrent time, and send the concurrent group information to the AP2 and the AP3.
  • Step 403 AP2 receives the concurrent group information, and measures the strength of the received signal from STA1. If the received signal strength from STA1 is less than the received signal strength threshold corresponding to STA1, AP2 determines to join the concurrent group.
  • Step 406 The AP2 selects the STA2 with the smallest signal strength to join the concurrent group according to the measurement result of all the associated STAs, and sends a notification message to the STA2 to notify the STA2 of the concurrent time.
  • Channel competition is performed using the target CCA threshold corresponding to STA2.
  • the AP2 preferentially sends the updated concurrent group information to the AP1 and the AP3.
  • AP1 finds that it has joined the concurrent group.
  • the AP1 does not process the concurrent group information sent by AP2.
  • AP3 finds that AP2 also joins the concurrent group.
  • AP3 receives the measurement process of the concurrent information sent by AP1 before the end of AP3, and determines whether to join the concurrent group according to the concurrent group information sent by AP2. .
  • the determining module 11 is configured to determine, from all the STAs associated with the AP, the concurrent STAs that join the concurrent group;
  • a generating module 12 configured to generate concurrent group information of the concurrent group, where the concurrent group information includes an identifier of the AP, an identifier of a concurrent STA associated with the AP, and a concurrent time of the concurrent group;
  • the sending module 13 is configured to send a notification message to the concurrent STA associated with the AP, where the notification message includes the concurrent time and a target CCA threshold of the concurrent STA associated with the AP a value, the notification message is used to notify the concurrent STA associated with the AP to perform channel competition using the target CCA threshold in the concurrent time;
  • the sending module 13 is further configured to send the concurrent group information to other APs in the system except the AP.
  • the determining module 11 selects one or more STAs from all the STAs associated with the AP as the concurrent STAs of the AP according to the STA priority order, and the determining module 11 preferentially selects the high priority.
  • the STA acts as a concurrent STA.
  • the concurrent group information further includes a maximum number of concurrent service sets, where the maximum number of concurrent service sets is used to indicate that the other APs determine that the number of service sets that have been joined in the concurrent group reaches When the maximum number of concurrent service sets is the number, the joining of the concurrent group is stopped.
  • an AP receives the concurrent group information sent by the other APs, first, it is determined whether the number of the concurrent service group that has joined the smaller group is smaller than the maximum number of concurrent service sets. If the number of sets is smaller than the maximum number of concurrent service sets, the AP further determines whether it joins the concurrent group. If the number of service sets that have joined the concurrent group is equal to the maximum number of concurrent service sets, Then the AP stops joining the concurrent group.
  • the concurrent group information may not carry the maximum number of concurrent service sets.
  • an AP receives the concurrent group information sent by other APs, it determines whether the current time has reached the concurrency included in the concurrent group information. Time, if the concurrent time is not reached, the AP further determines whether or not to join the concurrent group. If the concurrent time has been reached, the AP stops joining the concurrent group.
  • the concurrent group information further includes an identifier of the concurrent group.
  • FIG. 10 is a schematic structural diagram of an AP according to Embodiment 6 of the present invention.
  • an AP is used as a first AP.
  • the first AP provided in this embodiment includes: a receiving module 21, and a first The determination module 22, the second determination module 23, the transmission module 24, and the update module 25 are determined.
  • the receiving module 21 is configured to receive the concurrent group information of the concurrent group, where the concurrent group information includes: an identifier of each second AP that has joined the concurrent group, and an identifier of the concurrent station STA that is associated with each second AP. And the concurrent time of the concurrent group;
  • a first determining module 22 configured to determine whether to join the concurrent group according to the identifier of the concurrent STA associated with each second AP indicated by the concurrent group information;
  • the update module 25 is configured to update the concurrent group information, where the updated concurrent group information includes an identifier of the first AP and an identifier of a concurrent STA associated with the first AP;
  • the sending module 24 is further configured to send the updated concurrent group information to other APs in the system except the first AP.
  • the first determining module 22 is specifically configured to: separately measure, according to the identifiers of the concurrent STAs associated with the second APs, the received signal strengths of the concurrent STAs associated with the second APs; Whether the received signal strengths of the concurrent STAs that are associated with the second APs are smaller than the received signal strength thresholds corresponding to the concurrent STAs associated with the second APs, if they are from the concurrent STAs associated with the second APs. If the received signal strength is smaller than the received signal strength threshold corresponding to the concurrent STA associated with each second AP, it is determined to join the concurrent group.
  • the first determining module 22 acquires, according to the identifier of the concurrent STA associated with each second AP, the distance of the first AP to the concurrent STAs associated with the second AP, and the concurrent STAs that are associated with the second AP according to the first AP. The distance determines whether to join the concurrent group.
  • the second determining module 23 is configured to: send, to the STAs that are associated with the first AP, a measurement indication message, where the measurement indication message includes an identifier of each second AP, where the measurement indication The message is used to indicate that all STAs associated with the first AP measure received signal strengths from the second APs; and then receive all STAs associated with the first AP to return The received signal strengths from the second APs are selected from the STAs associated with the first AP, and one or more STAs having a smaller received signal strength from the second APs are selected as the first AP. Concurrent STA.
  • the second determining module 23 randomly selects one or more STAs from all the STAs associated with the AP as the concurrent STAs of the AP.
  • the second determining module 23 selects one or more STAs with high priority from all the STAs associated with the AP as the concurrent STAs of the AP according to the STA priority order.
  • the concurrent group information includes a maximum number of concurrent service sets
  • the first determining module 22 is further configured to: determine whether the number of the second APs that have joined the concurrent group is smaller than And determining, according to the identifier of the concurrent STA associated with each second AP, if the number of the second APs that have joined the concurrent group is smaller than the number of the maximum number of concurrent services. Whether the first AP joins the concurrent group. If the number of the second APs that have joined the concurrent group is equal to the maximum number of concurrent service sets, the first determining module 22 determines that the first AP stops joining the concurrent group.
  • the number of the maximum concurrent service sets is not included in the concurrent group information, and the first determining module 22 is further configured to: determine whether the current time has reached the concurrent time; if the current time does not arrive at the current time And determining, according to the identifier of the concurrent STA associated with each second AP, whether the first AP joins the concurrent group. And if the current time reaches the concurrent time, the first determining module determines that the first AP stops joining the concurrent group.
  • the concurrent group information further includes: an identifier of the concurrent group.
  • the first AP in this embodiment may be used to implement the technical solutions provided in the second embodiment and the fourth embodiment, and the implementation principles and technical effects are similar, and details are not described herein again.
  • FIG. 11 is a schematic structural diagram of a STA according to Embodiment 7 of the present invention. As shown in FIG. 11, the STA in this embodiment includes: a receiving module 31 and a contention module 32.
  • the receiving module 31 is configured to receive a notification message sent by the access point AP, where the STA is a concurrent STA associated with the AP, and the notification message is that the AP determines that the STA joins the concurrent group. And sending, by the STA, the notification message includes a concurrent time of the concurrent group and a target CCA threshold of the STA;
  • the competition module 32 is configured to perform channel competition by using the target CCA in the concurrent time according to the notification message.
  • the receiving module 31 is further configured to: receive a measurement indication message sent by the AP, where the measurement The quantity indication message includes the identifiers of the second APs that have joined the concurrent group, and the measurement indication message is used to indicate that the STA measures the received signal strengths from the second APs;
  • the STA further includes: a measurement module 33 and a sending module 34.
  • the measurement module 33 is configured to measure received signal strengths from the second APs according to the identifiers of the second APs included in the measurement indication message.
  • the sending module 34 is configured to send the received signal strengths from the second APs to the AP, so that the AP determines, according to the received signal strengths from the second APs, whether the STA joins the concurrent group. .
  • the STAs in this embodiment may be used to implement the technical solutions provided in the third embodiment and the fourth embodiment, and the implementation principles and technical effects are similar, and details are not described herein again.
  • the AP communication apparatus 400 of this embodiment includes: a processor 41, a memory 42, a communication interface 43, and a system bus 44.
  • the memory 42 and the communication interface 43 are connected and communicated with the processor 41 via the system bus 44; the communication interface 43 is for communicating with other devices; the memory 42 stores computer executable instructions 421
  • the processor 41 is configured to run the execution instruction 421 to cause the AP 400 to perform the method as follows:
  • the notification message includes the concurrency time and a target CCA threshold of the concurrent STA associated with the AP, where the notification message is used to notify the concurrent STA associated with the AP Using the target CCA threshold for channel competition in the concurrent time;
  • the processor 41 determines, from all the STAs associated with the AP, the concurrent STAs that join the concurrent group, specifically: measuring the received signal strength of all the associated STAs to the AP; One or more STAs having the strongest received signal strength are selected among all STAs as concurrent STAs of the AP.
  • the concurrent group information further includes a maximum number of concurrent service sets, where the maximum number of concurrent service sets is used to indicate that the other APs determine the service set that has been joined in the concurrent group.
  • the joining of the concurrent group is stopped.
  • the concurrent group information further includes an identifier of the concurrent group.
  • the AP communication device of this embodiment can be used to implement the technical solutions provided in the first embodiment and the fourth embodiment, and the implementation principles and technical effects thereof are similar, and details are not described herein again.
  • FIG. 13 is a schematic structural diagram of a first AP communication apparatus according to Embodiment 9 of the present invention.
  • the first AP communication 500 of this embodiment includes: a processor 51, a memory 52, a communication interface 53, and a system bus 54.
  • the memory 52 and the communication interface 53 are connected and communicated with the processor 51 via the system bus 54; the communication interface 53 is configured to communicate with other devices; the memory 52 stores a computer execution
  • the processor 51 is configured to execute the computer execution instruction 521 to cause the first AP communication device 500 to perform the method as follows:
  • the concurrent group information includes: an identifier of each second AP that has joined the concurrent group, an identifier of the concurrent site STA associated with each second AP, and a concurrent time of the concurrent group ;
  • the first AP joins the concurrent group, determining, according to the identifier of each second AP, a concurrent STA that joins the concurrent group from all STAs associated with the first AP;
  • the updated concurrent group information includes the identifier of the first AP and the identifier of the concurrent STA associated with the first AP, and sends the updated concurrent group information to the system.
  • the processor 51 determines, according to the identifier of each second AP, a concurrent STA that joins the concurrent group from all the STAs associated with the first AP, specifically: associated with the first AP. All the STAs send a measurement indication message, where the measurement indication message includes an identifier of each second AP, where the measurement indication message is used to indicate that all STAs associated with the first AP measure receiving from the second APs. Signal strength; receiving received signal strengths from the second APs returned by all STAs associated with the first AP, and selecting received signal strengths from the second APs from all STAs associated with the first AP The smaller one or more STAs act as concurrent STAs of the first AP.
  • the concurrent group information includes a maximum number of concurrent service sets
  • the processor 51 determines, according to the identifier of the concurrent STA associated with each second AP, whether the first AP joins the concurrent Before the group, the processor 51 determines whether the number of the second APs that have joined the concurrent group is less than the maximum number of concurrent service sets; if the number of the second APs that have joined the concurrent group If the number is smaller than the maximum number of concurrent service sets, determine whether the first AP joins the concurrent group according to the identifier of the concurrent STA associated with each second AP. If the number of the second APs that have joined the concurrent group is equal to the maximum number of concurrent service sets, it is determined that the first AP stops joining the concurrent group.
  • the processor 51 determines, according to the identifier of the concurrent STA associated with each second AP, whether the first AP joins the concurrent group, and the processor 51 determines whether the current time has reached the concurrent If the current time does not reach the concurrent time, determine whether the first AP joins the concurrent group according to the identifier of the concurrent STA associated with each second AP. If the current time reaches the concurrent time, it is determined that the first AP stops joining the concurrent group.
  • the concurrent group information further includes: an identifier of the concurrent group.
  • the first AP communication device in this embodiment may be used to implement the technical solutions provided in the second embodiment and the fourth embodiment, and the implementation principles and technical effects are similar, and details are not described herein again.
  • the communication apparatus 600 of this embodiment includes: a processor 61, a memory 62, and a communication interface 63, and the memory 62 and the a communication interface 63 is connected to and communicates with the processor 61; the communication interface a port 63 for communicating with other devices; the memory 62 storing a computer execution instruction 621; the processor 61, configured to execute the computer execution instruction 621, to cause the communication device 600 to execute the STA as described below Methods:
  • the notification message includes a concurrency time of the concurrent group and a target CCA threshold of the STA;
  • channel competition is performed using the target CCA threshold during the concurrent time.
  • the processor 61 is further configured to: receive the measurement indication message sent by the AP, where the measurement indication message includes the group that has joined the concurrent group.
  • the identifier of each second AP the measurement indication message is used to indicate that the STA measures the received signal strength from the second APs, and is measured according to the identifiers of the second APs included in the measurement indication message.
  • Received signal strengths from the respective second APs and transmitting received signal strengths from the second APs to the APs to cause the AP to determine the received signal strengths from the second APs Whether the STA joins the concurrent group.
  • the STAs in this embodiment may be used to implement the technical solutions provided in the third embodiment and the fourth embodiment, and the implementation principles and technical effects are similar, and details are not described herein again.
  • the embodiments of the present invention can be implemented by means of software and necessary general hardware including general-purpose integrated circuits, general-purpose CPUs, general-purpose memories, and general-purpose Components and the like can of course be realized by dedicated hardware including an application specific integrated circuit, a dedicated CPU, a dedicated memory, a dedicated component, etc., but in many cases, the former is a better implementation.
  • the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product, which may be stored in a readable storage medium, such as a USB flash drive.
  • a computer device which may be a personal computer, server, or network device, etc. performs the methods of various embodiments of the present invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

本发明实施例提供一种空闲信道评估CCA阈值的调整方法和设备，所述方法包括：AP从关联的所有STA中确定加入并发组的并发STA，生成所述并发组的并发组信息；并将所述并发组信息发送给系统中除所述AP之外的其他AP，以使其他AP所属的BSS根据并发组信息确定加入该并发组，最终形成该并发组。加入该并发组内的AP关联的所有并发STA在并发时间内使用提升后的目标CCA阈值行信道竞争，以增大自己发送数据的可能性，从而提高系统的吞吐量，而并发组外的AP关联的所有STA以及并发组内的AP关联的非并发STA使用较低的正常的CCA阈值进行信道竞争，这样，通过控制并发组内的BSS的个数可以控制并发链路的个数，从而降低了并发链路间的干扰，进一步提高系统吞吐量。

Description

空闲信道评估CCA阈值的调整方法和设备 技术领域
本发明涉及通信技术，尤其涉及一种空闲信道评估(Clear Channel Assessment，简称CCA)阈值的调整方法和设备。
背景技术
无线局域网(Wireless Local Area Network，简WLAN)凭借其在高速率和低成本方面的优势，成为当今主流的移动宽带接入技术之一。现有WLAN的介质访问控制(Media Access Control，简称MAC)层采用载波侦听/冲突避免(Carrier Sense Multiple Access/Collision Avoidance，简称CSMA/CA)的竞争机制进行数据传输。发送节点在发送数据前监测信道的能量，若信道的能量超过CCA阈值，则认为信道忙，若信道的能量低于CCA阈值，则认为信道空闲。当信道空闲时，发送节点才进行信道竞争，为了提高WLAN系统的数据吞吐率，可以提升CCA门限，提高链路的传输机会。但是，实际的通信系统中，提升CCA门限反而可能降低了系统的吞吐量。
发明内容
本发明实施例提供一种空闲信道评估CCA阈值的调整方法和设备，能够提升系统的吞吐量。
本发明第一方面提供一种空闲信道评估CCA阈值的调整方法，包括：
接入点AP从关联的所有站点STA中确定加入并发组的并发STA，生成所述并发组的并发组信息，所述并发组信息包括所述AP的标识、所述AP关联的并发STA的标识和所述并发组的并发时间；
所述AP向关联的并发STA发送通知消息，所述通知消息中包括所述并发时间和所述AP关联的并发STA的目标CCA阈值，所述通知消息用于通知所述AP关联的并发STA在所述并发时间内使用所述目标CCA阈值进行信道竞争；
所述AP将所述并发组信息发送给系统中除所述AP之外的其他AP。
结合本发明第一方面，在本发明第一方面的第一种可能的实现方式中，所述AP从关联的所有站点STA中确定加入并发组的并发STA，包括：
所述AP测量关联的所有STA到所述AP的接收信号强度；
所述AP从关联的所有STA中选择接收信号强度最强的一个或多个STA作为所述AP的并发STA。
结合本发明第一方面以及本发明第一方面的第一种可能的实现方式，在本发明第一方面的第二种可能的实现方式中，所述并发组信息中还包括最大并发服务集个数，所述最大并发服务集个数用于指示所述其他AP在确定所述并发组中已经加入的服务集的个数达到所述最大并发服务集个数时，停止加入所述并发组。
结合本发明第一方面以及本发明第一方面的第一种和第二种可能的实现方式，在本发明第一方面的第三种可能的实现方式中，所述并发组信息中还包括所述并发组的标识。
本发明第二方面提供一种空闲信道评估CCA阈值的调整方法，包括：
第一接入点AP接收并发组的并发组信息，所述并发组信息包括：已经加入所述并发组的各第二AP的标识、所述各第二AP关联的并发站点STA的标识和所述并发组的并发时间；
所述第一AP根据所述并发组信息所指示的所述各第二AP关联的并发STA的标识确定是否加入所述并发组；
若所述第一AP确定加入所述并发组，则所述第一AP根据所述各第二AP的标识从所述第一AP关联的所有STA中确定加入所述并发组的并发STA；
所述第一AP向关联的并发STA发送通知消息，所述通知消息中包括所述并发时间和所述第一AP关联的并发STA的目标CCA阈值，所述第二通知消息用于通知所述第一AP关联的并发STA在所述并发时间内使用所述目标CCA阈值进行信道竞争；
所述第一AP更新所述并发组信息，所述更新后的并发组信息包含所述第一AP的标识和所述第一AP关联的并发STA的标识，并将所述更新后的并发组信息发送给系统中除所述第一AP之外的其他AP。
结合本发明第二方面，在本发明第二方面的第一种可能的实现方式中，所述第一AP根据所述各第二AP关联的并发STA的标识确定是否加入所述并发组，包括：
所述第一AP根据所述各第二AP关联的并发STA的标识分别测量来自所述各第二AP关联的并发STA的接收信号强度；
所述第一AP分别判断来自所述各第二AP关联的并发STA的接收信号强度是否小于预先设置的所述各第二AP关联的并发STA对应的接收信号强度阈值；
若来自所述各第二AP关联的并发STA的接收信号强度均小于所述各第二AP关联的并发STA对应的接收信号强度阈值，则所述第一AP确定加入所述并发组。
结合本发明第二方面以及本发明第二方面的第一种可能的实现方式，在本发明第二方面的第二种可能的实现方式中，所述第一AP根据所述各第二AP的标识从所述第一AP关联的所有STA中确定加入所述并发组的并发STA，包括：
所述第一AP向关联的所有STA发送测量指示消息，所述测量指示消息中包括所述各第二AP的标识，所述测量指示消息用于指示所述第一AP关联的所有STA测量来自所述各第二AP的接收信号强度；
所述第一AP接收关联的所有STA返回的来自所述各第二AP的接收信号强度，从所述第一AP关联的所有STA中选择来自所述各第二AP的接收信号强度较小的一个或多个STA作为所述第一AP的并发STA。
结合本发明第二方面以及本发明第二方面的第一种和第二种可能的实现方式，在本发明第二方面的第三种可能的实现方式中，所述并发组信息中包括最大并发服务集个数，所述第一AP根据所述各第二AP关联的并发STA的标识确定是否加入所述并发组之前，所述方法还包括：
所述第一AP判断已经加入所述并发组的所述第二AP的个数是否小于所述最大并发服务集个数；
若已经加入所述并发组的所述第二AP的个数小于所述最大并发服务集个数，则所述第一AP根据所述各第二AP关联的并发STA的标识确定是否加入所述并发组。
结合本发明第二方面的第三种可能的实现方式，在本发明第二方面的第四种可能的实现方式中，若已经加入所述并发组的所述第二AP的个数等于所述最大并发服务集个数，则所述第一AP停止加入所述并发组。
结合本发明第二方面以及本发明第二方面的第一种和第二种可能的实现方式，在本发明第二方面的第五种可能的实现方式中，所述第一AP根据所述各第二AP关联的并发STA的标识确定是否加入所述并发组之前，所述方法还包括：
所述第一AP判断当前时间是否到达了所述并发时间；
若所述当前时间没有到达所述并发时间，则所述第一AP根据所述各第二AP关联的并发STA的标识确定是否加入所述并发组。
结合本发明第二方面的第五种可能的实现方式，在本发明第二方面的第六种可能的实现方式中，所述第一AP判断当前时间是否到达了所述并发时间之后，还包括：
若所述当前时间到达了所述并发时间，则所述第一AP停止加入所述并发组。
结合本发明第二方面以及的本发明第二方面第一种至第六种可能的实现方式，在本发明第二方面的第七种可能的实现方式中，所述并发组信息还包括：所述并发组的标识。
本发明第三方面提供一种空闲信道评估CCA阈值的调整方法，包括：
站点STA接收接入点AP发送的通知消息，其中，所述STA为所述AP关联的并发STA，所述通知消息是所述AP在确定所述STA加入并发组后向所述STA发送的，所述通知消息中包括所述并发组的并发时间和所述STA的目标CCA阈值；
所述STA根据所述通知消息，在所述并发时间内使用所述目标CCA阈值进行信道竞争。
结合本发明第三方面，在本发明第三方面的第一种可能的实现方式中，所述站点STA接收接入点AP发送的通知消息之前，所述方法还包括：
所述STA接收所述AP发送的测量指示消息，所述测量指示消息中包括已经加入所述并发组的各第二AP的标识，所述测量指示消息用于指示所述STA测量来自所述各第二AP的接收信号强度；
所述STA根据所述测量指示消息中包括的所述各第二AP的标识，测量来自所述各第二AP的接收信号强度；
所述STA向所述AP发送来自所述各第二AP的接收信号强度，以使所述AP根据来自所述各第二AP的接收信号强度确定所述STA是否加入所述并发组。
本发明第四方面提供一种接入点AP，包括：
确定模块，用于从所述AP关联的所有站点STA中确定加入并发组的并发STA；
生成模块，用于生成所述并发组的并发组信息，所述并发组信息包括所述AP的标识、所述AP关联的并发STA的标识和所述并发组的并发时间；
发送模块，用于向所述AP关联的并发STA发送通知消息，所述通知消息中包括所述并发时间和所述AP关联的并发STA的目标CCA阈值，所述通知消息用于通知所述AP关联的并发STA在所述并发时间内使用所述目标CCA阈值进行信道竞争；
所述发送模块，还用于将所述并发组信息发送给系统中除所述AP之外的其他AP。
结合本发明第四方面，在本发明第四方面的第一种可能的实现方式中，所述确定模块具体用于：
测量所述AP关联的所有STA到所述AP的接收信号强度；
从所述AP关联的所有STA中选择接收信号强度最强的一个或多个STA作为所述AP的并发STA。
结合本发明第四方面以及本发明第四方面的第一种可能的实现方式，在本发明第四方面的第二种可能的实现方式中，所述并发组信息中还包括最大并发服务集个数，所述最大并发服务集个数用于指示所述其他AP在确定所述并发组中已经加入的服务集的个数达到所述最大并发服务集个数时，停止加入所述并发组。
结合本发明第四方面以及本发明第四方面的第一种和第二种可能的实现方式，在本发明第四方面的第三种可能的实现方式中，所述并发组信息中还包括所述并发组的标识。
本发明第五方面提供一种接入点AP，所述AP为第一AP，所述第一AP包括：
接收模块，用于接收并发组的并发组信息，所述并发组信息包括：已经加入所述并发组的各第二AP的标识、所述各第二AP关联的并发站点STA的标识和所述并发组的并发时间；
第一确定模块，用于根据所述并发组信息所指示的所述各第二AP关联的并发STA的标识确定是否加入所述并发组；
第二确定模块，用于若所述第一确定模块确定所述第一AP确定加入所述并发组，则根据所述各第二AP的标识从所述第一AP关联的所有STA中确定加入所述并发组的并发STA；
发送模块，用于向所述第一AP关联的并发STA发送通知消息，所述通知消息中包括所述并发时间和所述第一AP关联的并发STA的目标CCA阈值，所述第二通知消息用于通知所述第一AP关联的并发STA在所述并发时间内使用所述目标CCA阈值进行信道竞争；
更新模块，用于更新所述并发组信息，所述更新后的并发组信息包含所述第一AP的标识和所述第一AP关联的并发STA的标识；
所述发送模块，还用于将所述更新后的并发组信息发送给系统中除所述第一AP之外的其他AP。
结合本发明第五方面，在本发明第五方面的第一种可能的实现方式中，所述第一确定模块具体用于：
根据所述各第二AP关联的并发STA的标识分别测量来自所述各第二AP关联的并发STA的接收信号强度；
分别判断来自所述各第二AP关联的并发STA的接收信号强度是否小于预先设置的所述各第二AP关联的并发STA对应的接收信号强度阈值，若来自所述各第二AP关联的并发STA的接收信号强度均小于所述各第二AP关联的并发STA对应的接收信号强度阈值，则确定加入所述并发组。
结合本发明第五方面以及本发明第五方面的第一种可能的实现方式，在本发明第五方面的第二种可能的实现方式中，所述第二确定模块具体用于：
向所述第一AP关联的所有STA发送测量指示消息，所述测量指示消 息中包括所述各第二AP的标识，所述测量指示消息用于指示所述第一AP关联的所有STA测量来自所述各第二AP的接收信号强度；
接收所述第一AP关联的所有STA返回的来自所述各第二AP的接收信号强度，从所述第一AP关联的所有STA中选择来自所述各第二AP的接收信号强度较小的一个或多个STA作为所述第一AP的并发STA。
结合本发明第五方面以及本发明第五方面的第一种和第二种可能的实现方式，在本发明第五方面的第三种可能的实现方式中，所述并发组信息中包括最大并发服务集个数，相应地，所述第一确定模块还用于：
判断已经加入所述并发组的所述第二AP的个数是否小于所述最大并发服务集个数，若已经加入所述并发组的所述第二AP的个数小于所述最大并发服务集个数，则根据所述各第二AP关联的并发STA的标识确定所述第一AP是否加入所述并发组。
结合本发明第五方面的第三种可能的实现方式，在本发明第五方面的第四种可能的实现方式中，若已经加入所述并发组的所述第二AP的个数等于所述最大并发服务集个数，则所述第一确定模块确定所述第一AP停止加入所述并发组。
结合本发明第五方面以及本发明第五方面的第一种和第二种可能的实现方式，在本发明第五方面的第五种可能的实现方式中，所述第一确定模块还用于：
判断当前时间是否到达了所述并发时间；
若所述当前时间没有到达所述并发时间，则根据所述各第二AP关联的并发STA的标识确定所述第一AP是否加入所述并发组。
结合本发明第五方面的第五种可能的实现方式，在本发明第五方面的第六种可能的实现方式中，若所述当前时间到达了所述并发时间，则所述第一确定模块确定所述第一AP停止加入所述并发组。
结合本发明第五方面以及的本发明第五方面第一种至第六种可能的实现方式，在本发明第五方面的第七种可能的实现方式中，所述并发组信息还包括：所述并发组的标识。
本发明第六方面提供一种站点STA，包括：
接收模块，用于接收接入点AP发送的通知消息，其中，所述STA为 所述AP关联的并发STA，所述通知消息是所述AP在确定所述STA加入并发组后向所述STA发送的，所述通知消息中包括所述并发组的并发时间和所述STA的目标CCA阈值；
竞争模块，用于根据所述通知消息，在所述并发时间内使用所述目标CCA阈值进行信道竞争。
结合本发明第六方面，在本发明第六方面的第一种可能的实现方式中，所述接收模块还用于：接收所述AP发送的测量指示消息，所述测量指示消息中包括已经加入所述并发组的各第二AP的标识，所述测量指示消息用于指示所述STA测量来自所述各第二AP的接收信号强度；
相应地，所述STA还包括：
测量模块，用于根据所述测量指示消息中包括的所述各第二AP的标识，测量来自所述各第二AP的接收信号强度；
发送模块，用于向所述AP发送来自所述各第二AP的接收信号强度，以使所述AP根据来自所述各第二AP的接收信号强度确定所述STA是否加入所述并发组。
本发明第七方面提供一种接入点AP通信装置，包括：处理器、存储器和通信接口以及系统总线，所述存储器和所述通信接口通过所述系统总线与所述处理器连接并通信；
所述通信接口，用于和其他设备进行通信；
所述存储器中存储有计算机可执行的指令；
所述处理器，用于运行所述计算机执行指令，使所述通信装置执行本发明第一方面以及本发明第一方面的第一种至第三种可能的实现方式提供的任一所述的方法。
本发明第八方面提供一种接入点AP通信装置，所述AP为第一AP，所述第一AP包括：处理器、存储器、通信接口以及系统总线，所述存储器和所述通信接口通过所述系统总线与所述处理器连接并通信；
所述通信接口，用于和其他设备进行通信；
所述存储器中存储有计算机执行指令；
所述处理器，用于运行所述计算机执行指令，使所述通信装置执行本发明第二方面以及本发明第二方面的第一种至第七种可能的实现方式提供的任 一所述的方法。
本发明第九方面提供一种通信装置，包括：处理器、存储器以及通信接口，所述存储器和所述通信接口与所述处理器连接并通信；
所述通信接口，用于和其他设备进行通信；
所述存储器中存储有计算机执行指令；
所述处理器，用于运行所述计算机执行指令，使所述通信装置执行本发明第一方面以及本发明第一方面的第一种可能的实现方式中的任一所述的方法。
本发明实施例提供的空闲信道评估阈值的调整方法和设备，AP通过从关联的所有站点STA中确定加入并发组的并发STA，然后生成所述并发组的并发组信息，所述并发组信息包括所述AP的标识、所述AP关联的并发STA的标识和所述并发组的并发时间；所述AP并将所述并发组信息发送给系统中除所述AP之外的其他AP，以使其他AP所述的BSS根据并发组信息确定加入该并发组，最终形成该并发组。加入该并发组的所有并发STA在并发时间内使用提高后的目标CCA阈值进行信道竞争，以增大自己发送数据的可能性，从而能够提高系统的吞吐量，而并发组外的AP关联的所有STA以及并发组内的AP关联的非并发STA不提升CCA阈值，使用较低的正常的CCA阈值进行信道竞争，这样，通过控制并发组内的BSS的个数可以控制并发链路的个数，从而可以降低并发链路间的干扰，进一步提高系统吞吐量。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作一简单地介绍，显而易见地，下面描述中的附图是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1为本发明实施例一提供的CCA阈值的调整方法的流程图；
图2为通知消息的一种结构示意图；
图3为本发明实施例二提供的CCA阈值的调整方法的流程图；
图4为并发组信息的一种结构示意图；
图5为测量指示消息的结构示意图；
图6为本发明CCA阈值的调整方法实施例三的结构示意图；
图7为本发明实施例四提供的并发组形成过程的流程示意图；
图8为本发明实施例四所使用的系统结构示意图；
图9为本发明实施例五提供的AP的结构示意图；
图10为本发明实施例六提供的AP的结构示意图；
图11为本发明实施例七提供的STA的结构示意图；
图12为本发明实施例八提供的AP通信装置的结构示意图；
图13为本发明实施例九提供的第一AP通信装置的结构示意图；
图14为本发明实施例十提供的通信装置的结构示意图。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
图1为本发明实施例一提供的CCA阈值的调整方法的流程图。本实施例提供的方法可以由AP执行，本领域技术人员可以理解，AP可以是能够为无线终端提供无线信号收发服务的网络侧设备。每个AP提供的无线信号可覆盖一定的位置范围，布置多个AP时，呈蜂窝状的各个覆盖区域构成整个无线网络系统，每个AP可以关联多个STA，STA是WLAN中的客户端，可以是装有无线网卡的计算机，也可以是具有WiFi模块的智能手机。STA可以是移动的，也可以是固定的，STA是无线局域网的最基本组成单元。本发明实施例中提到的，AP关联的STA即在AP的无线信号覆盖范围内的STA。AP以及与AP关联的多个STA组成一个基本服务集(Basic Service Set，简称BSS)，多个BSS构成了无线网络系统。
现有技术中，通过对误包率(packet error rate，简称PER)值进行修正，根据修正后的PER值对当前的CCA阈值进行调整，达到了通过真实 有效的碰撞PER值动态调整CCA阈值以适应不同环境的变化，提高网络吞吐率和服务质量的效果。通过提升CCA阈值，在一定程度上能够提高系统吞吐量。
然而，对于密集部署的无线网络系统，大量的AP和STA进行通信，会产生较为明显的干扰。简言之，传统的提高CCA阈值的方法，通过增加链路传输的可能性，加大了吞吐量提升的可能性，但是，会产生大量的并发链路，大量的并发链路之间形成了较强的干扰，反而影响系统吞吐量的提升。为了更加有效地提升系统吞吐量，一个本发明实施例的方案通过建立并发组，每个AP从其关联的所有STA中选取STA加入并发组，并发组内的AP关联的所有并发STA在并发时间内使用提升后的目标CCA阈值进行信道竞争，并发组外的AP关联的所有STA以及并发组内的AP关联的非并发STA不提升CCA阈值，使用较低的正常的CCA阈值进行信道竞争，这样，通过控制并发组内的BSS的个数可以控制并发链路的个数，从而可以减少并发链路引起的干扰，有效提升系统吞吐量。
另外，本发明各实施例中提到的并发组是指可以在在同一时间使用相同的通信资源进行通信的通信设备的集合。并发通信是指并发组内的所有并发STA在同一时间可以使用相同的通信资源进行通信，通信资源具体指信道，例如使用某一特定通信频率的信道，其中，并发通信可以是STA和STA之间的通信或STA和AP之间的通信，STA和STA之间通信时也需要通过AP。并发组内的各并发STA在并发时间内并发通信时，各并发STA相互之间的干扰很小。
一个实施例中，AP作为并发组的创建者，如图1所示，本实施例的方法可以包括以下步骤：
步骤101、AP从关联的所有STA中确定加入并发组的并发STA，生成该并发组的并发组信息，该并发组信息包括该AP的标识、该AP关联的并发STA的标识和该并发组的并发时间。
AP作为并发组的创建者，首先从自身关联的所有STA中选择加入的并发组的并发STA，AP可以选取一个或多个STA加入并发组，AP选取的并发STA的个数可以预先约定好。AP在选取并发STA时，可以随机选取，或者根据各STA优先级顺序选取，优先选取优先级高的STA作为并 发STA，或者AP测量关联的所有STA到AP的接收信号强度，然后，从AP关联的所有STA中选择接收信号强度最强或者较强的一个或多个STA作为AP的并发STA。
AP在确定并发STA之后，将并发STA加入并发组，生成该并发组的并发组信息，该并发组信息包括该AP的标识、该AP关联的并发STA的标识和并发时间。并发组信息中还可以包括并发组标识，当系统中有多个并发组时，各个并发组之间通过并发组标识来区别，各个并发组的并发时间不同，并且各个并发组的并发时间不能有重叠，一个AP或STA可以加入多个并发组中，加入并发组内的AP所关联的并发STA在并发时间内可以并发通信。
步骤102、AP向关联的并发STA发送通知消息，该通知消息中包括并发时间和该AP关联的并发STA的目标CCA阈值，该通知消息用于通知该AP关联的并发STA在并发时间内使用该目标CCA阈值进行信道竞争。
图2为通知消息的一种结构示意图，如图2所示，通知消息包含：第一字段，为并发组标识；第二字段，为AP关联的并发STA的标识；第三字段，为并发时间；第四字段，为并发STA的目标CCA阈值。这些字段的顺序在具体例子中可以不一样，另外，其中的某些字段可以进行某种形式的复用。
当AP关联的并发STA为多个时，多个并发STA的目标CCA阈值可以相同也可以不同，AP可以根据每个并发STA的情况设置不同的目标CCA阈值。该目标CCA可以由AP根据历史系统吞吐量采用现有的算法计算得到。一种实现方式中，该目标CCA阈值为一个静态值，即在并发时间内所有并发STA使用该目标CCA阈值。另一种实现方式中，每个BSS内的AP可以动态的调整该目标CCA阈值，例如，在并发时间的开始时刻所有并发STA都将CCA阈值调整到并发组消息中携带的目标CCA阈值，将并发组消息中携带的目标CCA阈值作为初始目标CCA阈值，在一段时间后，统一将初始目标CCA阈值提高一定的数值，然后，各个AP计算所属BSS吞吐量，若提高初始目标CCA阈值后整个系统的吞吐量增加了，那么将初始目标CCA阈值提高到该调整后的目标CCA阈值，同理，继续 增大目标CCA阈值的值，至到系统吞吐量不能在增大了。
本发明各实施例中，在并发时间的起始时刻，并发STA将CCA阈值提高到目标CCA阈值，在并发时间内并发STA使用该目标CCA阈值进行信道竞争。在并发时间的起始时刻，系统中除并发STA外的其他STA不提高CCA阈值。在并发时间结束后外，所有并发STA又将CCA阈值恢复到正常值。在并发时间内，假如AP关联的多个并发STA都有数据要发送，那么各个并发STA在发送数据前先要进行载波侦听，若检测到当前信道的能量超过该目标CCA阈值，说明当前信道忙，STA不发送数据，若检测到当前信道的能量小于该目标CCA阈值，说明当前信道空闲，各个并发STA进行信道竞争。换言之，对于一个BSS内的STA在进行信道竞争时采用CSMA/CA竞争机制，最终该AP关联的多个并发STA中只有一个并发STA能够竞争到信道。在并发时间内，其他非并发STA采用较小的正常的CCA阈值进行CSMA/CA竞争，其竞争到信道的机会一般小于前述的并发STA。加入并发组的多个BSS内的STA在并发时间可以同时进行信道竞争，竞争到信道的并发STA在并发时间内可以并发通信。
在CSMA/CA机制中，当STA侦听到信道空闲后，STA随机等待一个时间，然后广播发送请求准许发送(Request to send，简称RTS)帧，RTS帧内包含一个网络分配矢量(Network Allocation Vector，简称NAV)字段和一个接收地址。当网络系统中的一个AP接收到该RTS帧时，如果该RTS中的接收地址和自己的介质接入地址(Media Access Control，简称MAC)地址不同，不做任何回应，只是设置自己在NAV时段内不发送数据。如果一个AP接收到该RTS帧，并且该RTS帧中的接收地址和自己的MAC地址相同，则在RTS结束短帧间隔(Short Interframe Space，简称SIFS)之后广播发送准许发送(Clear to send，简称CTS)帧，CTS帧的接收地址为RTS帧的发送地址，CTS帧中也携带NAV，CTS帧中携带的NAV等于RTS帧中携带的NAV减去CTS帧传输时间减去CTS的传输时间和SIFS时间，收到CTS帧的STA，若发现接收地址与自己的地址不同，则在CTS帧中携带的NAV时段内不发送数据，若STA的地址与自己的地址相同，则该STA竞争到信道，在CTS帧中携带的NAV时段内可以发送数据。假设，AP1关联有两个并发STA：STA1和STA2，若STA1 和STA2在并发时间内都有数据要发送，STA1首先向AP1发送RTS帧，AP1收到RTS帧后广播CTA帧，AP1关联的所有STA都能收到该CTS，STA2在收到CTS帧后，不会进行数据发送，在并发时间内只有STA1进行数据发送。
步骤103、AP将并发组信息发送给系统中除AP之外的其他AP。
具体地，AP可以通过与其他AP之间的回程线路(backhaul)将并发组信息发送给其他AP，以使其他AP所属的服务集选择加入并发组信息所指示的并发组，并发组中的所有并发STA在并发时间内将自身的CCA阈值提高到目标CCA阈值，使用该目标CCA阈值进行信道竞争。其他AP在收到该并发组信息后，根据并发组信息确定是否加入该并发组，最终会有多个服务集加入该并发组。加入该并发组内的AP所关联的并发STA在并发时间内分别进行信道竞争，分别有一个并发STA成功的竞争到与该STA关联的AP之间的信道，然后通过该信道可以和其关联的AP通信，或者可以通过其关联的AP和别的STA通信。竞争到该信道的各并发STA在并发起时间内可以使用该信道并发的通信，即竞争到该信道的所有并发STA在同一时间可以使用该信道进行通信。并发组内的各并发STA在并发时间内并发通信时，各并发STA相互之间的干扰很小。该并发组内的所有并发STA在并发时间内使用提高后的目标CCA阈值进行信道竞争，并发组外的STA使用正常的CCA阈值进行信道竞争，这里正常CCA阈值是指没有提高之前的CCA阈值。并且，加入该并发组内的所有并发STA，在并发时间外又将CCA阈值从目标CCA阈值降低到正常CCA阈值。
本实施例的方法，AP从关联的所有STA中确定加入并发组的并发STA，将自身的并发STA加入并发组，生成并发组的并发组信息，并将并发组信息发送给系统中的其他AP，以使其他AP所属的服务集根据并发组信息选择加入该并发组，最终形成该并发组，该并发组内的AP关联的所有并发STA在并发时间内使用提升后的目标CCA阈值进行信道竞争，以增大自己发送数据的可能性，从而能够提高系统的吞吐量，而并发组外的AP关联的所有STA以及并发组内的AP关联的非并发STA不提升CCA阈值，使用较低的正常的CCA阈值进行信道竞争，这样，通过控制并发组内的BSS的个数可以控制并发链路的个数，限制了系统中并发链路的个 数，从而可以降低并发链路间的干扰，进一步提高系统吞吐量。
可选地，在实施例一中，并发组信息中还可以包括最大并发服务集个数，该最大并发服务集个数用于指示其他AP在确定并发组中已经加入的服务集的个数达到最大并发服务集个数时，不加入并发组。当某一AP接收到其他AP发送来的并发组信息，首先，判断已经加入该并发组服务集的个数是否小于该最大并发服务集个数，具体地，AP接收到的并发组信息中包括已经加入该并发组的AP的标识，AP根据已经加入该并发组的AP的标识得到已经加入该并发组的AP的个数，已经加入该并发组的AP的个数等于加入该并发组服务集的个数，因此，AP可以将已经加入该并发组的AP的个数与并发组信息中包括的最大并发服务集的个数进行比较。若已经加入该并发组服务集的个数小于该最大并发服务集个数，AP才会进一步根据并发组信息中已经加入该并发组的各AP的标识、以及已经加入该并发组的各AP关联的并发STA的标识进一步确定自己是否加入并发组；若已经加入该并发组的服务集的个数等于该最大并发服务集个数，说明该并发组已经满了，AP停止尝试加入该并发组，即AP不再继续执行后续操作：根据并发组信息中已经加入该并发组的各AP的标识、以及已经加入该并发组的各AP关联的并发STA的标识进一步确定自己是否加入并发组。
当然，并发组信息中也可以不携带最大并发服务集个数，某个AP在接收到其他AP发送来的并发组信息时，判断当前时间是否达到了并发时间，若没有达到并发时间，那么说明该AP有机会加入该并发组，该AP根据已经加入该并发组的各AP的标识、以及已经加入该并发组的各AP关联的并发STA的标识进一步确定自己是否加入该并发组，若已经达到了并发时间，那么AP停止尝试加入该并发组，即AP不再继续执行后续操作：根据并发组信息中已经加入该并发组的各AP的标识、以及已经加入该并发组的各AP关联的并发STA的标识进一步确定自己是否加入并发组。
实施例一是从并发组的创建者的角度来说明本发明实施例的方案，本发明实施例二将从并发组的加入者的角度具体说明本发明实施例的方案，图3为本发明实施例二提供的CCA阈值的调整方法的流程图，如图3所示，本实施的方法可以包括以下步骤：
步骤201、第一AP接收并发组的并发组信息，该并发组信息包括：已经 加入该并发组的各第二AP的标识、各第二AP关联的并发STA的标识和该并发组的并发时间。
图4为并发组信息的一种结构示意图，如图4所示，并发组信息包括：第一字段，为并发组的标识；第二字段，第二AP的标识；第三字段，为第二字段中包括的第二AP关联的并发STA的标识，图4中各个字段具有一定的顺序，字段的顺序代表了加入该并发组的AP和STA的顺序，以此类推，当有更多的AP和关联的STA加入并发组时，依次将加入的AP以及关联的并发STA按照顺序写到相应的字段中，该并发组信息的最后一个字段为该并发组的并发时间。
步骤202、第一AP根据并发组信息所指示的各第二AP关联的并发STA的标识确定是否加入并发组。
具体地，第一AP可以根据以下方式确定是否加入该并发组：
首先，第一AP根据各第二AP关联的并发STA的标识分别测量来自各第二AP关联的并发STA的接收信号强度。
来自各第二AP关联的并发STA的接收信号强度，具体是指各第一AP接收到的第二AP的关联的并发STA发送的数据的接收信号强度。当有多个第二AP时，且每个AP关联多个并发STA时，第一AP需要测量来自所有第二AP关联的并发STA的接收信号强度。第一AP在测量来自每个第二AP关联的并发STA到的接收信号强度时，具体为，当该第二AP关联的并发STA向该第二AP发送数据时，第一AP也能监听到该第二AP关联的并发STA发送的数据，第一AP将来自该第二AP关联的并发STA发送的数据的接收信号的功率作为接收信号强度。
然后，第一AP分别判断来自各第二AP关联的并发STA的接收信号强度是否小于预先设置的各第二AP关联的并发STA对应的接收信号强度阈值。
第一AP根据已经加入并发组的所有并发STA到自己的接收信号强度确定是否加入该并发组，当已经加入并发组的所有并发STA到自己的接收信号强度均小于接收信号强度阈值时，说明已经加入该并发组的所有并发STA对第一AP的干扰很小，第一AP加入该并发组后可以进行正常的数据收发，不会受到已经加入该并发组的并发STA的干扰。当各第二AP关联的并发STA中有一个并发STA到第一AP的接收信号强度不满足上述条件时，说明该不 满足条件的并发STA对第一AP的干扰较大，若第一AP加入该并发组，该不满足条件的并发STA会干扰第一AP正常的数据收发，因此，第一AP不加入该并发组。
本实施例中，各第二AP关联的并发STA对应的接收信号强度阈值可通过以下三种方式设置：第一种方式，所有第二AP关联的并发STA对应的接收信号强度阈值都相同，即设置统一的接收信号强度阈值。第二种方式，可以针对每个第二AP设置一个接收信号强度阈值，不同第二AP对应的接收信号强度阈值可以不同，但每个第二AP关联的多个并发STA的接收信号强度阈值都相同。第三种方式，所有第二AP关联的并发STA对应的接收信号强度阈值都单独设置，每个第二AP关联的多个并发STA对应的接收信号强度也可能不同。
上述只是列举了一种第一AP确定是否加入并发组的方法，当然，第一AP还可以通过其他方式，例如，第一AP根据各第二AP关联的并发STA的标识，获取第一AP到各第二AP关联的并发STA的距离，根据第一AP到各第二AP关联的并发STA的距离确定是否加入并发组。
步骤203、若第一AP确定加入并发组，则第一AP根据各第二AP的标识从第一AP关联的所有STA中确定加入该并发组的并发STA。
具体可以采用如下方式：
首先，第一AP向关联的所有STA发送测量指示消息，该测量指示消息中包括各第二AP的标识，该测量指示消息用于指示第一AP关联的所有STA测量来自各第二AP的接收信号强度。
例如，图5为一个测量指示消息的结构示意图，如图5所示，该测量指示消息中的第一个字段为并发组的标识，第二个字段为AP1的标识，第三个字段为AP2的标识，AP1和AP2均为第二AP。该测量指示消息可以携带在信标帧(beacon)中或探测响应帧(probe response)中。
第一AP关联的所有STA接收到测量指示消息后，分别根据AP1和AP2的标识分别测量来自AP1和AP2的接收信号强度，也就是说第一AP关联的每个STA都需要测量两个接收信号强度。
然后，第一AP接收关联的所有STA返回的来自各第二AP的接收信号强度，这里接收信号的强度具体可以为来自各第二AP的接收信号的接 收功率。从第一AP关联的所有STA中选择来自各第二AP的接收信号强度较小的一个或多个STA作为第一AP的并发STA。
一种方式中，第一AP关联的每个STA均需要将自己测量到的接收信号的强度发送给第一AP，第一AP根据所有STA的测量结果进行选取，具体地，第一AP将STA测量得到的来自各第二AP的接收信号强度分别与预先设置的阈值进行比较，从中选取来自各第二AP的接收信号强度都小于该预先设置的阈值的STA作为并发STA。或者，当来自各第二AP的接收信号强度都小于预先设置的阈值的STA为多个时，第一AP将来自各第二AP的接收信号强度都小于预先设置的阈值的多个STA作为备选STA，然后，第一AP从该备选STA中选取来自各第二AP的接收信号强度均最小的一个或多个STA作为并发STA。
另一种方式中，第一AP关联的每个STA在测量完成后，将测量得到的来自各第二AP的接收信号强度分别与预先设置的阈值进行比较，当来自各第二AP的接收信号强度均小于该预先设置的阈值时，则STA向第一AP上报测量结果，当来自各第二AP的接收信号强度中有一个接收信号强度不小于该预先设置的阈值时，则STA不向第一AP上报测量结果。第一AP可以将上报的满足来自各第二AP的接收信号强度均小于该预先设置的阈值的所有STA都作为并发STA。或者，当上报的STA为多个时，第一AP可以将上报的所有STA作为备选STA，然后，第一AP从该备选STA中选择来自各第二AP的接收信号强度均最小的一个或多个STA作为并发STA。
在上述两种方式中，若所有的STA都不满足条件时，即来自各第二AP的接收信号强度均小于该预先设置的阈值不存在，那么第一AP加入该并发组失败。
上述方式中，第一AP根据每个第二AP到STA到接收信号强度选取接收信号强度小的STA作为并发STA，第二AP到STA的接收信号强度越小，说明该第二AP对STA的干扰越小。例如，每个AP在确定并发STA时，都选择接收信号强度最小的STA可以降低并发STA之间的干扰，并发组内的并发STA在同时发送数据时干扰很小，从而能够提高整个系统的吞吐量。现有技术中，为了增大吞吐量，提高系统内所有STA的CCA阈值，导致系统中并发链路多，并发链路之间干扰大，本实施的方案，只有并发组内的并发 STA在并发时间内才提高CCA阈值，从而限制了系统中并发链路的个数，降低了并发链路间的干扰，从而能够提高系统吞吐量。
当然，第二AP还可以采用其他方式确定并发STA，例如随机选取或者根据STA优先级顺序选取，本发明实施例只是举例说明，并不对此第一AP的选择方式进行限制。
步骤204、第一AP向关联的并发STA发送通知消息，该通知消息中包括并发时间和第一AP关联的并发STA的目标CCA阈值，第二通知消息用于通知第一AP关联的并发STA在并发时间内使用该目标CCA阈值进行信道竞争。
当第一AP关联的并发STA为多个时，每个并发STA的目标CCA阈值可以相同，也可以不同。
步骤205、更新并发组信息，该更新后的并发组信息包含第一AP的标识和该第一AP关联的并发STA的标识，并将更新后的并发组信息发送给系统中除第一AP之外的其他AP。
第一AP通过将更新后的并发组信息发送给系统的中的其他AP，以使其他AP根据更新后的并发组信息选择加入并发组，并发组中的所有并发STA在并发时间的起始时刻将自身的CCA阈值提高到目标CCA阈值，在并发时间内并发STA使用该目标CCA阈值进行信道竞争。使用该目标CCA阈值进行信道竞争的STA其竞争到信道的机会一般大于使用采用较小的正常的CCA阈值进行信道竞争的STA。竞争到信道的并发STA在并发时间内可以使用竞争到的信道并发的通信，并发通信可以是STA和STA之间的通信或STA和AP之间的通信。并发组内的各并发STA在并发时间内并发通信时，各并发STA相互之间的干扰很小。
本实施例的方法，第一AP根据接收到的并发组信息，确定自己是否加入并发组，若第一AP确定自己加入并发组，则进一步从关联的所有STA中确定加入并发组的并发STA，并更新并发组信息，将更新后的并发组信息发送给系统中的其他AP，最终形成并发组。该并发组内的AP关联的所有并发所有STA在并发时间内使用提高后的目标CCA阈值进行信道竞争，以增大自己发送数据的可能性，从而能够提高系统的吞吐量，而并发组外的AP关联的所有STA以及并发组内的AP关联的非并发STA不提升 CCA阈值，使用较低的正常的CCA阈值进行信道竞争，这样，通过控制并发组内的BSS的个数可以控制并发链路的个数，限制了系统中并发链路的个数，从而可以降低并发链路间的干扰，进一步提高系统吞吐量。
在上述实施例二的基础上，可选地，步骤202之前还包括以下步骤：第一AP判断已经加入并发组的第二AP的个数是否小于最大并发服务集个数，最大并发服务集个数携带在并发组信息中，若已经加入并发组的第二AP的个数小于最大并发服务集个数，第一AP才执行步骤202。若已经加入并发组的第二AP的个数等于最大并发服务集个数，则第一AP停止尝试加入并发组，即第一AP不会在执行步骤202以及步骤202之后的步骤。
或者，步骤202之前包括如下步骤：第一AP判断当前时间是否到达了所述并发时间；若当前时间没有到达并发时间，则第一AP执行步骤202，若当前时间到达了并发时间，则第一AP停止尝试加入并发组，即第一AP不再执行步骤202以及步骤202之后的步骤。
图6为本发明CCA阈值的调整方法实施例三的结构示意图，本实施例从STA角度具体描述CCA阈值的调整方法，如图6所示，本实施例的方法包括以下步骤：
步骤301、STA接收AP发送的通知消息，其中，STA为AP关联的并发STA，该通知消息是AP在确定STA加入并发组后向STA发送的，通知消息中包括并发组的并发时间和STA的目标CCA阈值。
步骤302、STA根据通知消息，在并发时间内使用该目标CCA阈值进行信道竞争。
本实施例的方法，STA根据AP发送的通知消息，在并发时间的起始时刻将自身的CCA阈值提高到目标CCA阈值，在并发时间内该并发组内的所有并发STA都使用该目标CCA阈值进行信道竞争。加入该并发组内的其他AP所关联的并发STA在并发时间内也使用自己的目标CCA阈值进行信道竞争，使用目标CCA阈值进行信道竞争的STA其竞争到信道的机会一般大于使用采用较小的正常的CCA阈值进行信道竞争的STA。竞争到信道的并发STA在并发时间内可以使用竞争到的信道进行并发通信，并发通信可以是STA和STA之间的通信或STA和AP之间的通信。并发组内的各并发STA在并发时间内并发通信时，各并发STA相互之间的干 扰很小。
在实施例三的基础上，当AP不是并发组的创建者时，该AP关联的并发STA在步骤301之前还包括：STA接收AP发送的测量指示消息，该测量指示消息用于指示该STA测量来自各第二AP的接收信号强度，STA在测量完成后，一种方式中，STA向AP发送来自各第二AP的接收信号强度，由AP根据来自所述各第二AP的接收信号强度确定STA是否加入并发组，另一种方式中，STA自己确定是否加入并发组，若STA确定加入并发组，则STA向AP上报来自各第二AP的接收信号强度。AP或者STA根据来自所述各第二AP的接收信号强度确定STA是否加入并发组的具体方式可以参照实施例二中步骤203的相关描述，这里不再赘述。
图7为本发明实施例四提供的并发组形成过程的流程示意图，图8为本发明实施例四所使用的系统结构示意图，如图8所示，系统中包括三个BSS，每个BSS的AP选择一个并发STA加入并发组。如图7所示，本实施例的方法包括以下步骤：
步骤401、AP1从关联的所有STA中确定STA1加入并发组，生成并发组信息。
该并发组信息中包括AP1的表示、STA1的标识和并发时间。
步骤402、AP1向STA1发送通知消息，通知STA1在并发时间内使用STA1对应的目标CCA阈值进行信道竞争，并将并发组信息发送给AP2和AP3。
步骤403、AP2接收并发组信息，测量来自STA1的接收信号的强度，若来自STA1的接收信号强度小于STA1对应的接收信号强度阈值，AP2确定加入并发组。
步骤404、AP2向关联的所有STA发送测量指示消息，指示AP2关联的所有STA进行信号强度测量。
该测量指示消息中包括AP1的标识。
步骤405、AP2关联的所有STA分别测量来自AP1的接收信号强度，并向AP2上报测量结果。
步骤406、AP2根据关联的所有STA的测量结果，选择信号强度最小的STA2加入并发组，并向STA2发送通知消息，通知STA2在并发时间 内使用STA2对应的目标CCA阈值进行信道竞争。
步骤407、AP2更新并发组信息，该更新后的并发组信息包含AP2的标识和STA2的标识，并将更新后的并发组信息发送给AP1和AP3。
实际上，在AP2执行步骤403-407的过程中，AP3也同时在执行上述步骤，假设AP3确定自己加入并发组，并选定STA3作为并发STA加入并发组，并更新并发组信息，将AP3和STA3的标识添加到并发组信息中。正常情况下，AP3在更新并发组信息后，会将更新后的并发组信息发送给AP1和AP2，若AP3在发送更新后的并发组消息之前还接收到了AP2发送的并发组信息，那么AP3不会发送更新后的并发组消息。由于BSS2和BSS3在加入并发组所需的时间不同，若BSS2先完成加入过程，AP2会优先向AP1和AP3发送更新后的并发组信息。AP1在接收到AP2发送的并发组信息后，发现自己已经加入该并发组，则不对AP2发送的并发组信息进行处理。AP3在接收到AP2发送的并发组信息后，发现AP2也加入了并发组，那么AP3结束之前接收到AP1发送的并发信息的测量过程，重新根据AP2发送的并发组信息确定自己是否加入该并发组。
在AP3根据AP2发送的并发组信息加入并发组信息后，并发组形成。该并发组共包括三个BSS，STA1、STA2、STA3在并发时间的起始时刻分别提高自己的CCA阈值到目标CCA阈值。在并发时间内，STA1、STA2和STA3使用该目标CCA阈值进行信道竞争，STA1、STA2和STA3竞争信道后在并发时间内可以使用该信道并发通信。并发组内的各并发STA在并发时间内并发通信时，各并发STA相互之间的干扰很小。
图9为本发明实施例五提供的AP的结构示意图，如图9所示，本实施例的AP包括：确定模块11、生成模块12和发送模块13。
其中，确定模块11，用于从所述AP关联的所有站点STA中确定加入并发组的并发STA；
生成模块12，用于生成所述并发组的并发组信息，所述并发组信息包括所述AP的标识、所述AP关联的并发STA的标识和所述并发组的并发时间；
发送模块13，用于向所述AP关联的并发STA发送通知消息，所述通知消息中包括所述并发时间和所述AP关联的并发STA的目标CCA阈 值，所述通知消息用于通知所述AP关联的并发STA在所述并发时间内使用所述目标CCA阈值进行信道竞争；
所述发送模块13，还用于将所述并发组信息发送给系统中除所述AP之外的其他AP。
本实施例中，所述确定模块11具体可以通过如下几种方式确定并发STA：第一种方式，测量所述AP关联的所有STA到所述AP的接收信号强度；然后，从所述AP关联的所有STA中选择接收信号强度最强的一个或多个STA作为所述AP的并发STA。第二种方式，所述确定模块11随机的从所述AP关联的所有STA中选择一个或多个STA作为所述AP的并发STA。第三种方式，所述确定模块11根据各STA优先级顺序从所述AP关联的所有STA中选择一个或多个STA作为所述AP的并发STA，所述确定模块11优先选取优先级高的STA作为并发STA。
可选地，所述并发组信息中还包括最大并发服务集个数，所述最大并发服务集个数用于指示所述其他AP在确定所述并发组中已经加入的服务集的个数达到所述最大并发服务集个数时，停止加入所述并发组。当某一AP接收到其他AP发送来的并发组信息后，首先，判断已经加入所述并发组服务集的个数是否小于所述最大并发服务集个数，若已经加入所述并发组的服务集的个数小于所述最大并发服务集个数，AP才会进一步确定自己是否加入所述并发组，若已经加入所述并发组的服务集的个数等于所述最大并发服务集个数，则AP停止加入所述并发组。
当然，所述并发组信息中也可以不携带最大并发服务集个数，某个AP在接收到其他AP发送来的并发组信息时，判断当前时间是否达到了所述并发组信息中包含的并发时间，若没有达到所述并发时间，那么AP进一步确定自己是否加入所述并发组，若已经达到了所述并发时间，那么AP停止加入所述并发组。
可选地，所述并发组信息中还包括所述并发组的标识。
本实施例的AP可用于执行实施例一和实施例四提供的技术方案，其实现原理和技术效果类似，这里不再赘述。
图10为本发明实施例六提供的AP的结构示意图，本实施例中AP作为第一AP，如图10所示，本实施例提供的第一AP包括：接收模块21、第一 确定模块22、第二确定模块23、发送模块24和更新模块25。
其中，接收模块21，用于接收并发组的并发组信息，所述并发组信息包括：已经加入所述并发组的各第二AP的标识、所述各第二AP关联的并发站点STA的标识和所述并发组的并发时间；
第一确定模块22，用于根据所述并发组信息所指示的所述各第二AP关联的并发STA的标识确定是否加入所述并发组；
第二确定模块23，用于若所述第一确定模块确定所述第一AP确定加入所述并发组，则根据所述各第二AP的标识从所述第一AP关联的所有STA中确定加入所述并发组的并发STA；
发送模块24，用于向所述第一AP关联的并发STA发送通知消息，所述通知消息中包括所述并发时间和所述第一AP关联的并发STA的目标CCA阈值，所述第二通知消息用于通知所述第一AP关联的并发STA在所述并发时间内使用所述目标CCA阈值进行信道竞争；
更新模块25，用于更新所述并发组信息，所述更新后的并发组信息包含所述第一AP的标识和所述第一AP关联的并发STA的标识；
所述发送模块24，还用于将所述更新后的并发组信息发送给系统中除所述第一AP之外的其他AP。
可选地，所述第一确定模块22具体用于：根据所述各第二AP关联的并发STA的标识分别测量来自所述各第二AP关联的并发STA的接收信号强度；然后，分别判断来自所述各第二AP关联的并发STA的接收信号强度是否小于预先设置的所述各第二AP关联的并发STA对应的接收信号强度阈值，若来自所述各第二AP关联的并发STA的接收信号强度均小于所述各第二AP关联的并发STA对应的接收信号强度阈值，则确定加入所述并发组。或者，所述第一确定模块22根据各第二AP关联的并发STA的标识，获取第一AP到各第二AP关联的并发STA的距离，根据第一AP到各第二AP关联的并发STA的距离确定是否加入所述并发组。
可选地，所述第二确定模块23具体用于：向所述第一AP关联的所有STA发送测量指示消息，所述测量指示消息中包括所述各第二AP的标识，所述测量指示消息用于指示所述第一AP关联的所有STA测量来自所述各第二AP的接收信号强度；然后，接收所述第一AP关联的所有STA返回 的来自所述各第二AP的接收信号强度，从所述第一AP关联的所有STA中选择来自所述各第二AP的接收信号强度较小的一个或多个STA作为所述第一AP的并发STA。或者，所述第二确定模块23随机的从所述AP关联的所有STA中选择一个或多个STA作为所述AP的并发STA。或者，所述第二确定模块23根据各STA优先级顺序从所述AP关联的所有STA中选择一个或多个优先级高的STA作为所述AP的并发STA。
可选地，所述并发组信息中包括最大并发服务集个数，相应地，所述第一确定模块22还用于：判断已经加入所述并发组的所述第二AP的个数是否小于所述最大并发服务集个数，若已经加入所述并发组的所述第二AP的个数小于所述最大并发服务集个数，则根据所述各第二AP关联的并发STA的标识确定所述第一AP是否加入所述并发组。若已经加入所述并发组的所述第二AP的个数等于所述最大并发服务集个数，则所述第一确定模块22确定所述第一AP停止加入所述并发组。
可选地，所述并发组信息中不包括最大并发服务集个数，则所述第一确定模块22还用于：判断当前时间是否到达了所述并发时间；若所述当前时间没有到达所述并发时间，则根据所述各第二AP关联的并发STA的标识确定所述第一AP是否加入所述并发组。若所述当前时间到达了所述并发时间，则所述第一确定模块确定所述第一AP停止加入所述并发组。
可选地，所述并发组信息还包括：所述并发组的标识。
本实施例的第一AP，可用于执行实施例二和实施例四提供的技术方案，其实现原理和技术效果类似，这里不再赘述。
图11为本发明实施例七提供的STA的结构示意图，如图11所示，本实施例的STA包括：接收模块31和竞争模块32。
其中，接收模块31，用于接收接入点AP发送的通知消息，其中，所述STA为所述AP关联的并发STA，所述通知消息是所述AP在确定所述STA加入并发组后向所述STA发送的，所述通知消息中包括所述并发组的并发时间和所述STA的目标CCA阈值；
竞争模块32，用于根据所述通知消息，在所述并发时间内所述STA使用所述目标CCA进行信道竞争。
所述接收模块31还用于：接收所述AP发送的测量指示消息，所述测 量指示消息中包括已经加入所述并发组的各第二AP的标识，所述测量指示消息用于指示所述STA测量来自所述各第二AP的接收信号强度；
相应地，所述STA还包括：测量模块33和发送模块34。
其中，所述测量模块33，用于根据所述测量指示消息中包括的所述各第二AP的标识，测量来自所述各第二AP的接收信号强度。
发送模块34，用于向所述AP发送来自所述各第二AP的接收信号强度，以使所述AP根据来自所述各第二AP的接收信号强度确定所述STA是否加入所述并发组。
本实施例的STA，可用于执行实施例三和实施例四提供的技术方案，其实现原理和技术效果类似，这里不再赘述。
图12为本发明实施例八提供的AP通信装置的结构示意图，如图12所示，本实施例的AP通信装置400包括：处理器41、存储器42、通信接口43以及系统总线44，所述存储器42和所述通信接口43通过所述系统总线44与所述处理器41连接并通信；所述通信接口43，用于和其他设备进行通信；所述存储器42中存储有计算机可执行指令421；所述处理器41，用于运行所述执行指令421，使所述AP400执行如下所述的方法：
从所述AP关联的所有站点STA中确定加入并发组的并发STA，生成所述并发组的并发组信息，所述并发组信息包括所述AP的标识、所述AP关联的并发STA的标识和所述并发组的并发时间；
向所述AP关联的并发STA发送通知消息，所述通知消息中包括所述并发时间和所述AP关联的并发STA的目标CCA阈值，所述通知消息用于通知所述AP关联的并发STA在所述并发时间内使用所述目标CCA阈值进行信道竞争；
将所述并发组信息发送给系统中除所述AP之外的其他AP。
可选地，所述处理器41从所述AP关联的所有站点STA中确定加入并发组的并发STA，具体为：测量关联的所有STA到所述AP的接收信号强度；从所述AP关联的所有STA中选择接收信号强度最强的一个或多个STA作为所述AP的并发STA。
可选地，所述并发组信息中还包括最大并发服务集个数，所述最大并发服务集个数用于指示所述其他AP在确定所述并发组中已经加入的服务集的 个数达到所述最大并发服务集个数时，停止加入所述并发组。
可选地，所述并发组信息中还包括所述并发组的标识。
本实施例的AP通信装置，可用于执行实施例一和实施例四提供的技术方案，其实现原理和技术效果类似，这里不再赘述。
图13为本发明实施例九提供的第一AP通信装置的结构示意图，如图13所示，本实施例的第一AP通信500包括：处理器51、存储器52、通信接口53以及系统总线54，所述存储器52和所述通信接口53通过所述系统总线54与所述处理器51连接并通信；所述通信接口53，用于和其他设备进行通信；所述存储器52中存储有计算机执行指令521；所述处理器51，用于运行所述计算机执行指令521，使所述第一AP通信装置500执行如下所述的方法：
接收并发组的并发组信息，所述并发组信息包括：已经加入所述并发组的各第二AP的标识、所述各第二AP关联的并发站点STA的标识和所述并发组的并发时间；
根据所述并发组信息所指示的所述各第二AP关联的并发STA的标识确定所述第一AP是否加入所述并发组；
若确定所述第一AP加入所述并发组，则根据所述各第二AP的标识从所述第一AP关联的所有STA中确定加入所述并发组的并发STA；
向所述第一AP关联的并发STA发送通知消息，所述通知消息中包括所述并发时间和所述第一AP关联的并发STA的目标CCA阈值，所述第二通知消息用于通知所述第一AP关联的并发STA在所述并发时间内使用所述目标CCA阈值进行信道竞争；
更新所述并发组信息，所述更新后的并发组信息包含所述第一AP的标识和所述第一AP关联的并发STA的标识，并将所述更新后的并发组信息发送给系统中除所述第一AP之外的其他AP。
可选地，所述处理器51根据所述各第二AP关联的并发STA的标识确定所述第一AP是否加入所述并发组，具体为：根据所述各第二AP关联的并发STA的标识分别测量来自所述各第二AP关联的并发STA的接收信号强度；分别判断来自所述各第二AP关联的并发STA的接收信号强度是否小于预先设置的所述各第二AP关联的并发STA对应的接收信号强度阈值；若来自所 述各第二AP关联的并发STA的接收信号强度均小于所述各第二AP关联的并发STA对应的接收信号强度阈值，则确定所述第一AP加入所述并发组。
可选地，所述处理器51根据所述各第二AP的标识从所述第一AP关联的所有STA中确定加入所述并发组的并发STA，具体为：向所述第一AP关联的所有STA发送测量指示消息，所述测量指示消息中包括所述各第二AP的标识，所述测量指示消息用于指示所述第一AP关联的所有STA测量来自所述各第二AP的接收信号强度；接收所述第一AP关联的所有STA返回的来自所述各第二AP的接收信号强度，从所述第一AP关联的所有STA中选择来自所述各第二AP的接收信号强度较小的一个或多个STA作为所述第一AP的并发STA。
可选地，所述并发组信息中包括最大并发服务集个数，相应地，所述处理器51根据所述各第二AP关联的并发STA的标识确定所述第一AP是否加入所述并发组之前，所述处理器51判断已经加入所述并发组的所述第二AP的个数是否小于所述最大并发服务集个数；若已经加入所述并发组的所述第二AP的个数小于所述最大并发服务集个数，则根据所述各第二AP关联的并发STA的标识确定所述第一AP是否加入所述并发组。若已经加入所述并发组的所述第二AP的个数等于所述最大并发服务集个数，则确定所述第一AP停止加入所述并发组。
可选地，所述处理器51根据所述各第二AP关联的并发STA的标识确定所述第一AP是否加入所述并发组之前，所述处理器51判断当前时间是否到达了所述并发时间；若所述当前时间没有到达所述并发时间，则根据所述各第二AP关联的并发STA的标识确定所述第一AP是否加入所述并发组。若所述当前时间到达了所述并发时间，则确定所述第一AP停止加入所述并发组。
可选地，所述并发组信息还包括：所述并发组的标识。
本实施例的第一AP通信装置，可用于执行实施例二和实施例四提供的技术方案，其实现原理和技术效果类似，这里不再赘述。
图14为本发明实施例十提供的通信装置的结构示意图，如图14所示，本实施例的通信装置600包括：处理器61、存储器62、以及通信接口63，所述存储器62和所述通信接口63与所述处理器61连接并通信；所述通信接 口63，用于和其他设备进行通信；所述存储器62中存储有计算机执行指令621；所述处理器61，用于运行所述计算机执行指令621，使所述通信装置600执行如下所述STA的方法：
接收接入点AP发送的通知消息，其中，所述STA为所述AP关联的并发STA，所述通知消息是所述AP在确定所述STA加入并发组后向所述STA发送的，所述通知消息中包括所述并发组的并发时间和所述STA的目标CCA阈值；
根据所述通知消息，在所述并发时间内使用所述目标CCA阈值进行信道竞争。
进一步，所述站点STA接收接入点AP发送的通知消息之前，所述处理器61还用于：接收所述AP发送的测量指示消息，所述测量指示消息中包括已经加入所述并发组的各第二AP的标识，所述测量指示消息用于指示所述STA测量来自所述各第二AP的接收信号强度；根据所述测量指示消息中包括的所述各第二AP的标识，测量来自所述各第二AP的接收信号强度；并向所述AP发送来自所述各第二AP的接收信号强度，以使所述AP根据来自所述各第二AP的接收信号强度确定所述STA是否加入所述并发组。
本实施例的STA，可用于执行实施例三和实施例四提供的技术方案，其实现原理和技术效果类似，这里不再赘述。
本说明书中各个实施例采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似部分互相请参见即可。对于实施例提供的装置而言，由于其与实施例提供的方法相对应，所以描述的比较简单，相关之处请参见方法部分说明即可。
还需要说明的是，在本文中，诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一 个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。
通过以上的实施方式的描述，所属领域的技术人员可以清楚地了解到本发明各实施方式可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，但很多情况下前者是更佳的实施方式。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可以以软件产品的形式体现出来，该计算机软件产品可以存储在可读取的存储介质中，如U盘、移动存储介质、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储软件程序代码的介质，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的方法。
最后应说明的是：以上各实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述各实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的范围。

Claims (31)

  1. 一种空闲信道评估CCA阈值的调整方法，其特征在于，包括：
    接入点AP从关联的所有站点STA中确定加入并发组的并发STA，生成所述并发组的并发组信息，所述并发组信息包括所述AP的标识、所述AP关联的并发STA的标识和所述并发组的并发时间；
    所述AP向关联的并发STA发送通知消息，所述通知消息中包括所述并发时间和所述AP关联的并发STA的目标CCA阈值，所述通知消息用于通知所述AP关联的并发STA在所述并发时间内使用所述目标CCA阈值进行信道竞争；
    所述AP将所述并发组信息发送给系统中除所述AP之外的其他AP。
  2. 根据权利要求1所述的方法，其特征在于，所述AP从关联的所有站点STA中确定加入并发组的并发STA，包括：
    所述AP测量关联的所有STA到所述AP的接收信号强度；
    所述AP从关联的所有STA中选择接收信号强度最强的一个或多个STA作为所述AP的并发STA。
  3. 根据权利要求1或2所述的方法，其特征在于，所述并发组信息中还包括最大并发服务集个数，所述最大并发服务集个数用于指示所述其他AP在确定所述并发组中已经加入的服务集的个数达到所述最大并发服务集个数时，停止加入所述并发组。
  4. 根据权利要求1-3中任一项所述的方法，其特征在于，所述并发组信息中还包括所述并发组的标识。
  5. 一种空闲信道评估CCA阈值的调整方法，其特征在于，包括：
    第一接入点AP接收并发组的并发组信息，所述并发组信息包括：已经加入所述并发组的各第二AP的标识、所述各第二AP关联的并发站点STA的标识和所述并发组的并发时间；
    所述第一AP根据所述并发组信息所指示的所述各第二AP关联的并发STA的标识确定是否加入所述并发组；
    若所述第一AP确定加入所述并发组，则所述第一AP根据所述各第二AP的标识从所述第一AP关联的所有STA中确定加入所述并发组的并发STA；
    所述第一AP向关联的并发STA发送通知消息，所述通知消息中包括所述并发时间和所述第一AP关联的并发STA的目标CCA阈值，所述第二通知消息用于通知所述第一AP关联的并发STA在所述并发时间内使用所述目标CCA阈值进行信道竞争；
    所述第一AP更新所述并发组信息，所述更新后的并发组信息包含所述第一AP的标识和所述第一AP关联的并发STA的标识，并将所述更新后的并发组信息发送给系统中除所述第一AP之外的其他AP。
  6. 根据权利要求5所述的方法，其特征在于，所述第一AP根据所述各第二AP关联的并发STA的标识确定是否加入所述并发组，包括：
    所述第一AP根据所述各第二AP关联的并发STA的标识分别测量来自所述各第二AP关联的并发STA的接收信号强度；
    所述第一AP分别判断来自所述各第二AP关联的并发STA的接收信号强度是否小于预先设置的所述各第二AP关联的并发STA对应的接收信号强度阈值；
    若来自所述各第二AP关联的并发STA的接收信号强度均小于所述各第二AP关联的并发STA对应的接收信号强度阈值，则所述第一AP确定加入所述并发组。
  7. 根据权利要求5或6所述的方法，其特征在于，所述第一AP根据所述各第二AP的标识从所述第一AP关联的所有STA中确定加入所述并发组的并发STA，包括：
    所述第一AP向关联的所有STA发送测量指示消息，所述测量指示消息中包括所述各第二AP的标识，所述测量指示消息用于指示所述第一AP关联的所有STA测量来自所述各第二AP的接收信号强度；
    所述第一AP接收关联的所有STA返回的来自所述各第二AP的接收信号强度，从所述第一AP关联的所有STA中选择来自所述各第二AP的接收信号强度较小的一个或多个STA作为所述第一AP的并发STA。
  8. 根据权利要求5-7中任一项所述的方法，其特征在于，所述并发组信息中包括最大并发服务集个数，所述第一AP根据所述各第二AP关联的并发STA的标识确定是否加入所述并发组之前，所述方法还包括：
    所述第一AP判断已经加入所述并发组的所述第二AP的个数是否小于所 述最大并发服务集个数；
    若已经加入所述并发组的所述第二AP的个数小于所述最大并发服务集个数，则所述第一AP根据所述各第二AP关联的并发STA的标识确定是否加入所述并发组。
  9. 根据权利要求8所述的方法，其特征在于，若已经加入所述并发组的所述第二AP的个数等于所述最大并发服务集个数，则所述第一AP停止加入所述并发组。
  10. 根据权利要求5-7中任一项所述的方法，其特征在于，所述第一AP根据所述各第二AP关联的并发STA的标识确定是否加入所述并发组之前，所述方法还包括：
    所述第一AP判断当前时间是否到达了所述并发时间；
    若所述当前时间没有到达所述并发时间，则所述第一AP根据所述各第二AP关联的并发STA的标识确定是否加入所述并发组。
  11. 根据权利要求10所述的方法，其特征在于，所述第一AP判断当前时间是否到达了所述并发时间之后，还包括：
    若所述当前时间到达了所述并发时间，则所述第一AP停止加入所述并发组。
  12. 根据权利要求5-11中任一项所述的方法，其特征在于，所述并发组信息还包括：所述并发组的标识。
  13. 一种空闲信道评估CCA阈值的调整方法，其特征在于，包括：
    站点STA接收接入点AP发送的通知消息，其中，所述STA为所述AP关联的并发STA，所述通知消息是所述AP在确定所述STA加入并发组后向所述STA发送的，所述通知消息中包括所述并发组的并发时间和所述STA的目标CCA阈值；
    所述STA根据所述通知消息，在所述并发时间内使用所述目标CCA阈值进行信道竞争。
  14. 根据要求13所述的方法，其特征在于，所述站点STA接收接入点AP发送的通知消息之前，所述方法还包括：
    所述STA接收所述AP发送的测量指示消息，所述测量指示消息中包括已经加入所述并发组的各第二AP的标识，所述测量指示消息用于指示 所述STA测量来自所述各第二AP的接收信号强度；
    所述STA根据所述测量指示消息中包括的所述各第二AP的标识，测量来自所述各第二AP的接收信号强度；
    所述STA向所述AP发送来自所述各第二AP的接收信号强度，以使所述AP根据来自所述各第二AP的接收信号强度确定所述STA是否加入所述并发组。
  15. 一种接入点AP，其特征在于，包括：
    确定模块，用于从所述AP关联的所有站点STA中确定加入并发组的并发STA；
    生成模块，用于生成所述并发组的并发组信息，所述并发组信息包括所述AP的标识、所述AP关联的并发STA的标识和所述并发组的并发时间；
    发送模块，用于向所述AP关联的并发STA发送通知消息，所述通知消息中包括所述并发时间和所述AP关联的并发STA的目标CCA阈值，所述通知消息用于通知所述AP关联的并发STA在所述并发时间内使用所述目标CCA阈值进行信道竞争；
    所述发送模块，还用于将所述并发组信息发送给系统中除所述AP之外的其他AP。
  16. 根据权利要求15所述的AP，其特征在于，所述确定模块具体用于：
    测量所述AP关联的所有STA到所述AP的接收信号强度；
    从所述AP关联的所有STA中选择接收信号强度最强的一个或多个STA作为所述AP的并发STA。
  17. 根据权利要求15或16所述的AP，其特征在于，所述并发组信息中还包括最大并发服务集个数，所述最大并发服务集个数用于指示所述其他AP在确定所述并发组中已经加入的服务集的个数达到所述最大并发服务集个数时，停止加入所述并发组。
  18. 根据权利要求15-17中任一项所述的AP，其特征在于，所述并发组信息中还包括所述并发组的标识。
  19. 一种接入点AP，其特征在于，所述AP为第一AP，所述第一AP 包括：
    接收模块，用于接收并发组的并发组信息，所述并发组信息包括：已经加入所述并发组的各第二AP的标识、所述各第二AP关联的并发站点STA的标识和所述并发组的并发时间；
    第一确定模块，用于根据所述并发组信息所指示的所述各第二AP关联的并发STA的标识确定是否加入所述并发组；
    第二确定模块，用于若所述第一确定模块确定所述第一AP确定加入所述并发组，则根据所述各第二AP的标识从所述第一AP关联的所有STA中确定加入所述并发组的并发STA；
    发送模块，用于向所述第一AP关联的并发STA发送通知消息，所述通知消息中包括所述并发时间和所述第一AP关联的并发STA的目标CCA阈值，所述第二通知消息用于通知所述第一AP关联的并发STA在所述并发时间内使用所述目标CCA阈值进行信道竞争；
    更新模块，用于更新所述并发组信息，所述更新后的并发组信息包含所述第一AP的标识和所述第一AP关联的并发STA的标识；
    所述发送模块，还用于将所述更新后的并发组信息发送给系统中除所述第一AP之外的其他AP。
  20. 根据权利要求19所述的AP，其特征在于，所述第一确定模块具体用于：
    根据所述各第二AP关联的并发STA的标识分别测量来自所述各第二AP关联的并发STA的接收信号强度；
    分别判断来自所述各第二AP关联的并发STA的接收信号强度是否小于预先设置的所述各第二AP关联的并发STA对应的接收信号强度阈值，若来自所述各第二AP关联的并发STA的接收信号强度均小于所述各第二AP关联的并发STA对应的接收信号强度阈值，则确定加入所述并发组。
  21. 根据权利要求19或20所述的AP，其特征在于，所述第二确定模块具体用于：
    向所述第一AP关联的所有STA发送测量指示消息，所述测量指示消息中包括所述各第二AP的标识，所述测量指示消息用于指示所述第一AP关联的所有STA测量来自所述各第二AP的接收信号强度；
    接收所述第一AP关联的所有STA返回的来自所述各第二AP的接收信号强度，从所述第一AP关联的所有STA中选择来自所述各第二AP的接收信号强度较小的一个或多个STA作为所述第一AP的并发STA。
  22. 根据权利要求19-21中任一项所述的AP，其特征在于，所述并发组信息中包括最大并发服务集个数，相应地，所述第一确定模块还用于：
    判断已经加入所述并发组的所述第二AP的个数是否小于所述最大并发服务集个数，若已经加入所述并发组的所述第二AP的个数小于所述最大并发服务集个数，则根据所述各第二AP关联的并发STA的标识确定所述第一AP是否加入所述并发组。
  23. 根据权利要求22所述的AP，其特征在于，若已经加入所述并发组的所述第二AP的个数等于所述最大并发服务集个数，则所述第一确定模块确定所述第一AP停止加入所述并发组。
  24. 根据权利要求19-21中任一项所述的AP，其特征在于，所述第一确定模块还用于：
    判断当前时间是否到达了所述并发时间；
    若所述当前时间没有到达所述并发时间，则根据所述各第二AP关联的并发STA的标识确定所述第一AP是否加入所述并发组。
  25. 根据权利要求24所述的AP，其特征在于，若所述当前时间到达了所述并发时间，则所述第一确定模块确定所述第一AP停止加入所述并发组。
  26. 根据权利要求19-25中任一项所述的AP，其特征在于，所述并发组信息还包括：所述并发组的标识。
  27. 一种站点STA，其特征在于，包括：
    接收模块，用于接收接入点AP发送的通知消息，其中，所述STA为所述AP关联的并发STA，所述通知消息是所述AP在确定所述STA加入并发组后向所述STA发送的，所述通知消息中包括所述并发组的并发时间和所述STA的目标CCA阈值；
    竞争模块，用于根据所述通知消息，在所述并发时间内使用所述目标CCA阈值进行信道竞争。
  28. 根据要求27所述的STA，其特征在于，所述接收模块还用于：接收所述AP发送的测量指示消息，所述测量指示消息中包括已经加入所 述并发组的各第二AP的标识，所述测量指示消息用于指示所述STA测量来自所述各第二AP的接收信号强度；
    相应地，所述STA还包括：
    测量模块，用于根据所述测量指示消息中包括的所述各第二AP的标识，测量来自所述各第二AP的接收信号强度；
    发送模块，用于向所述AP发送来自所述各第二AP的接收信号强度，以使所述AP根据来自所述各第二AP的接收信号强度确定所述STA是否加入所述并发组。
  29. 一种接入点AP通信装置，其特征在于，包括：处理器、存储器、通信接口以及系统总线，所述存储器和所述通信接口通过所述系统总线与所述处理器连接并通信；
    所述通信接口，用于和其他设备进行通信；
    所述存储器中存储有计算机可执行指令；
    所述处理器，用于运行所述计算机执行指令，使所述通信装置执行如权利要求1-4任一所述的方法。
  30. 一种接入点AP通信装置，其特征在于，所述AP为第一AP，所述第一AP包括：处理器、存储器、通信接口以及系统总线，所述存储器和所述通信接口通过所述系统总线与所述处理器连接并通信；
    所述通信接口，用于和其他设备进行通信；
    所述存储器中存储有计算机执行指令；
    所述处理器，用于运行所述计算机执行指令，使所述通信装置执行如权利要求5-12中任一所述第一AP的方法。
  31. 一种通信装置，其特征在于，包括：处理器、存储器以及通信接口，所述存储器和所述通信接口与所述处理器连接并通信；
    所述通信接口，用于和其他设备进行通信；
    所述存储器中存储有计算机执行指令；
    所述处理器，用于运行所述计算机执行指令，使所述通信装置执行如权利要求12和13任一所述站点STA的方法。
PCT/CN2014/085768 2014-09-02 2014-09-02 空闲信道评估cca阈值的调整方法和设备 WO2016033740A1 (zh)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP14901148.8A EP3182784B1 (en) 2014-09-02 2014-09-02 Method and apparatus for adjusting clear channel assessment (cca) threshold
CN201480081584.8A CN106664719B (zh) 2014-09-02 2014-09-02 空闲信道评估cca阈值的调整方法和设备
PCT/CN2014/085768 WO2016033740A1 (zh) 2014-09-02 2014-09-02 空闲信道评估cca阈值的调整方法和设备
US15/446,314 US10440743B2 (en) 2014-09-02 2017-03-01 Method for adjusting clear channel assessment CCA threshold, and device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2014/085768 WO2016033740A1 (zh) 2014-09-02 2014-09-02 空闲信道评估cca阈值的调整方法和设备

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US15/446,314 Continuation US10440743B2 (en) 2014-09-02 2017-03-01 Method for adjusting clear channel assessment CCA threshold, and device

Publications (1)

Publication Number Publication Date
WO2016033740A1 true WO2016033740A1 (zh) 2016-03-10

Family

ID=55438989

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2014/085768 WO2016033740A1 (zh) 2014-09-02 2014-09-02 空闲信道评估cca阈值的调整方法和设备

Country Status (4)

Country Link
US (1) US10440743B2 (zh)
EP (1) EP3182784B1 (zh)
CN (1) CN106664719B (zh)
WO (1) WO2016033740A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106792724A (zh) * 2016-12-30 2017-05-31 杭州迪普科技股份有限公司 一种信道的调整方法及装置

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10015683B1 (en) * 2014-10-31 2018-07-03 Quantenna Communications, Inc Device optimization across wireless local area networks
US10349293B2 (en) 2015-04-17 2019-07-09 Qualcomm Incorporated Control of UE clear channel assessment by an eNB
JP6488206B2 (ja) * 2015-07-08 2019-03-20 株式会社東芝 無線通信装置および無線通信方法
EP3326420A1 (en) * 2015-07-20 2018-05-30 Telefonaktiebolaget LM Ericsson (publ) Controlling access to a shared wireless medium in a wireless communication system
WO2017154380A1 (ja) * 2016-03-08 2017-09-14 ソニー株式会社 無線通信装置および無線通信方法
WO2018222096A1 (en) * 2017-05-31 2018-12-06 Telefonaktiebolaget Lm Ericsson (Publ) Network node, wireless device and methods for handling interference
CN112511279B (zh) * 2020-02-28 2024-04-26 中兴通讯股份有限公司 一种数据传输方法、装置和存储介质

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080008133A1 (en) * 2006-05-18 2008-01-10 Jing Zhu Adjustment of a clear channel assessment (CCA) threshold
US20090129353A1 (en) * 2007-11-16 2009-05-21 Sungkyunkwan University Foundation For Corporate Collaboration Method for recognizing available channel in ieee 802.15.4 protocol csma/ca mechanism
CN103220065A (zh) * 2012-01-18 2013-07-24 中兴通讯股份有限公司 空闲信道评估阈值的调整方法及装置
CN103843443A (zh) * 2011-09-29 2014-06-04 高通股份有限公司 用于无线通信网络的冲突减少机制

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060046739A1 (en) * 2004-08-25 2006-03-02 Cisco Technology, Inc. Method and apparatus for improving performance in wireless networks by tuning receiver sensitivity thresholds
US7720440B2 (en) * 2006-05-18 2010-05-18 Intel Corporation Distributed coordination of a clear channel assessment (CCA) threshold
US9072073B2 (en) * 2010-02-04 2015-06-30 Nokia Corporation Adjusting channel access parameters due to traffic load
US9775135B2 (en) 2011-03-18 2017-09-26 Lg Electronics Inc. Method and device for communicating device-to-device
US8750876B2 (en) * 2012-02-15 2014-06-10 Telefonaktiebolaget L M Ericsson (Publ) Methods and devices for adjusting resource management procedures in heterogeneous communication networks based on cell information
EP3468257A1 (en) * 2012-05-03 2019-04-10 Interdigital Patent Holdings, Inc. Enhanced active scanning in wireless local area networks
US9210652B2 (en) * 2012-07-06 2015-12-08 Futurewei Technologies, Inc. System and method for active scanning in multi-channel Wi-Fi system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080008133A1 (en) * 2006-05-18 2008-01-10 Jing Zhu Adjustment of a clear channel assessment (CCA) threshold
US20090129353A1 (en) * 2007-11-16 2009-05-21 Sungkyunkwan University Foundation For Corporate Collaboration Method for recognizing available channel in ieee 802.15.4 protocol csma/ca mechanism
CN103843443A (zh) * 2011-09-29 2014-06-04 高通股份有限公司 用于无线通信网络的冲突减少机制
CN103220065A (zh) * 2012-01-18 2013-07-24 中兴通讯股份有限公司 空闲信道评估阈值的调整方法及装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3182784A4 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106792724A (zh) * 2016-12-30 2017-05-31 杭州迪普科技股份有限公司 一种信道的调整方法及装置
CN106792724B (zh) * 2016-12-30 2020-01-03 杭州迪普科技股份有限公司 一种信道的调整方法及装置

Also Published As

Publication number Publication date
CN106664719A (zh) 2017-05-10
US20170181189A1 (en) 2017-06-22
CN106664719B (zh) 2019-10-25
EP3182784A4 (en) 2017-08-30
EP3182784B1 (en) 2019-11-06
EP3182784A1 (en) 2017-06-21
US10440743B2 (en) 2019-10-08

Similar Documents

Publication Publication Date Title
WO2016033740A1 (zh) 空闲信道评估cca阈值的调整方法和设备
US11997712B2 (en) Techniques of improving EDCA mechanism in spatial reuse
EP3968724A1 (en) Frame transmission method and device using multiple random backoff operation in broadband wireless communication network
JP6254618B2 (ja) 受信機測定支援アクセスポイント制御
TWI676400B (zh) 一種進行隨機存取的方法和設備
RU2684758C2 (ru) Система и способ физического произвольного доступа на основе лепестка диаграммы направленности
US9807813B2 (en) Probe response suppression
WO2016044991A1 (zh) 终端、基站、基站控制器及毫米波蜂窝通信方法
US9999069B2 (en) MU-MIMO dynamic bandwidth selection
JP2021513783A (ja) 協調マルチアクセスポイントａｐ伝送のための方法および関連装置
US10028156B2 (en) Congestion based roaming in a wireless local area network
JP6591550B2 (ja) Ｗｉ−Ｆｉとの共存のためのリッスンビフォアトーク負荷ベースチャネルアクセス
US10602547B2 (en) Wireless device, an access point and respective methods performed thereby for communicating with the other
CN108551683A (zh) 在无线局域网中的增强型主动扫描
US10292092B2 (en) Device and method that uses base station frequency band as a secondary component carrier of carrier aggregation
US20170164409A1 (en) Method and apparatus for accessing broadband channel in wireless lan system
WO2017114032A1 (zh) 一种基于空间重用的退避方法及设备
EP3145237A1 (en) Processing method for dynamic channel detection, station, and access point device
CN106385695B (zh) 一种探测响应帧的发送方法及装置
US20190082382A1 (en) Adaptive discovery process for wireless devices
CN109963350A (zh) 消息接收方法及终端
WO2017080342A1 (zh) 信道检测的方法及装置
WO2016161633A1 (zh) 一种无线网络通信的方法和接入点设备
US9642070B2 (en) Method for avoiding interference in wireless local area network system and apparatus for performing the same
WO2020124731A1 (zh) 无线漫游方法及装置、存储介质、接入点设备

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14901148

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

REEP Request for entry into the european phase

Ref document number: 2014901148

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 2014901148

Country of ref document: EP