WO2015131500A1 - 一种信道检测方法、终端及系统 - Google Patents

一种信道检测方法、终端及系统 Download PDF

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Publication number
WO2015131500A1
WO2015131500A1 PCT/CN2014/084830 CN2014084830W WO2015131500A1 WO 2015131500 A1 WO2015131500 A1 WO 2015131500A1 CN 2014084830 W CN2014084830 W CN 2014084830W WO 2015131500 A1 WO2015131500 A1 WO 2015131500A1
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WO
WIPO (PCT)
Prior art keywords
bss
frame
signal strength
information
channel detection
Prior art date
Application number
PCT/CN2014/084830
Other languages
English (en)
French (fr)
Inventor
李楠
吕开颖
江岸明
孙波
田开波
姚珂
韩志强
Original Assignee
中兴通讯股份有限公司
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 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to EP14884771.8A priority Critical patent/EP3116255B1/en
Priority to US15/123,105 priority patent/US9913291B2/en
Publication of WO2015131500A1 publication Critical patent/WO2015131500A1/zh
Priority to US15/828,528 priority patent/US10085282B2/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/10—Access restriction or access information delivery, e.g. discovery data delivery using broadcasted information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/30—Resource management for broadcast services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]

Definitions

  • the present invention relates to detection technologies in the field of wireless communications, and in particular, to a channel detection method, terminal, and system. Background technique
  • WLANs wireless local area networks
  • the IEEE 802.il working group has defined a series of WLAN technology standards such as 802.11a, 802.11b, 802.llg, etc., and then other task groups have emerged, aiming to develop specifications related to the existing 802.11 technology improvements, for example, 802.11 ⁇
  • the task force proposes high-throughput (HT) requirements and supports data rates up to 600Mbps.
  • the 802.11ac task force proposes the concept of Very High Throughput (VHT), which increases the data rate to 1 Gbps.
  • Other 802.11 series protocols include support for 802.11ad operating at 60 GHz and support for 802.11ah operating below 1 GHz. .
  • an access point AP, Access Point
  • multiple non-AP associated stations STA, non-AP Station
  • BSS basic service set
  • 802.11 supports two methods of channel idle determination for virtual carrier detection and physical carrier detection.
  • virtual carrier detection refers to a third-party associated station other than the communication parties.
  • the Duration field sets the value of the Local Network Allocation Vector (NAV).
  • NAV Local Network Allocation Vector
  • Physical carrier detection refers to the channel detection technology of Clear Channel Assessment (CCA).
  • CCA Clear Channel Assessment
  • the associated station detects whether the channel is busy or idle by detecting the signal strength on the medium. Specifically, the associated station sets different detection thresholds for different channel bandwidths. For example, for a 20 MHz channel, the signal detection threshold set by the associated station is -82 dBm, and for the 40 MHz channel, the signal detection threshold set by the associated station is -79 dBm.
  • the signal detection threshold set by the associated station is -82 dBm
  • the signal detection threshold set by the associated station is -79 dBm.
  • the received signal is an 802.11 signal and the intensity is greater than -82dBm
  • the channel is considered busy
  • the physical layer transmission channel state of the associated station is busy indication to the media access control (MAC, Media Access). Control ) layer.
  • MAC Media Access
  • Control media access control
  • the existing CCA has the following problems: As shown in Figure 1, STA1 is associated with the API, and STA2 is associated with AP2, and the illustration shows the received signal strength between them.
  • STA1 sends the signal to STA
  • STA2 receives the signal of STA1
  • the signal strength is higher than the detection threshold of -82dBm.
  • STA2 considers that the channel is busy, so it does not send to AP2.
  • STA2 sends a signal to AP2 because The signal strength of STA2 reaching the API is much lower than the signal strength of STA1 to API, so it does not interfere with the reception of the API, and AP2 can successfully receive the signal of STA2. It can be seen that an excessively high CCA detection threshold causes a busy channel detection result for STA2, which reduces the transmission opportunity of STA2.
  • the CCA technique based on the above fixed threshold is used for channel detection
  • the proposed dynamic channel detection threshold mechanism although using a variable detection threshold for channel detection, can increase the transmission opportunity, but blindly
  • variable detection thresholds that is, both the fixed detection threshold and the dynamic channel detection threshold are equally problematic.
  • the present invention is directed to a channel detection method, apparatus and system that solves at least the problem of how to use a detection threshold for channel detection.
  • the associated site collects the detection information
  • the associated station determines whether to use the dynamic channel detection threshold for channel detection based on the detection information.
  • the detection information includes: at least one of basic service set BSS identification information of the received frame, uplink and downlink indication information of the received frame, neighboring BSS received signal strength, and local BSS received signal strength.
  • the BSS identification information of the received frame is information for distinguishing different BSSs, and is distinguished by at least one of the following manners:
  • Manner 1 The physical layer preamble sequence of the radio frame is used to distinguish
  • the signaling layer of the MAC layer is controlled by the physical layer or media access of the radio frame.
  • the uplink and downlink indication information of the received frame is information for distinguishing uplink and downlink of the frame;
  • the frame includes an uplink frame and a downlink frame, where the uplink frame is sent by the associated site to the access point.
  • a frame is a frame that is sent by the access point to the associated station;
  • the uplink and downlink information of the frame is distinguished by signaling of a physical layer or a MAC layer of a radio frame.
  • the neighboring cell BSS receives the signal strength as the received signal strength of the neighboring BSS access point received by the associated station and/or the receiving of the site associated with the neighboring access point received by the associated station Signal strength.
  • the BSS received signal strength is that the associated station receives the BSS access point. Received signal strength.
  • the associated station receives one or more detection information used by the associated site notified by the access point by the access point and a dynamic threshold parameter set corresponding to the one or more detection information.
  • the dynamic threshold parameter set includes a set of one or more parameters
  • the method further includes: the associated site can determine the value of the dynamic detection threshold using the dynamic threshold parameter set.
  • the method further includes: the associated station indicating to the access point whether it supports capability information of a dynamic channel detection threshold.
  • the associated station determines, according to the detection information, whether to use the dynamic channel detection threshold for channel detection, including:
  • the associated station When the detection information is the BSS identification information of the received frame, the associated station identifies that the BSS identification information indication of the received frame is a frame of the neighboring BSS, and determines to use the dynamic threshold parameter set as a dynamic channel detection threshold. The channel detection is performed.
  • the associated station determines, according to the detection information, whether to use the dynamic channel detection threshold for channel detection, including:
  • the associated station identifies that the BSS identification information indication of the received frame is a frame of the neighboring BSS,
  • the neighboring area BSS receives the signal strength or the BSS received signal strength as a reference value, or uses the result of the specified operation of the neighboring BSS received signal strength and the BSS received signal strength as a reference value;
  • the associated station determines, according to the detection information, how to perform channel detection by using a dynamic channel detection threshold, including: When the detection information is the BSS identification information of the received frame and the uplink and downlink indication information of the received frame, the associated station identifies that the BSS identification information of the received frame indicates a frame of the neighboring BSS, and the upper and lower sides of the received frame When the line indication information indicates that the current frame is an uplink frame, it is determined to use the dynamic threshold parameter set as a dynamic channel detection threshold to perform the channel detection.
  • the associated station determines, according to the detection information, how to perform channel detection by using a dynamic channel detection threshold, including:
  • the associated station identifies that the BSS identification information indication of the received frame is a frame of the neighboring area BSS, and the uplink and downlink indication information of the received frame indicates that the current frame is an uplink frame, and the received signal strength of the neighboring area BSS or the received signal strength of the BSS is used as a reference value, or the signal strength is received by the neighboring area BSS. And a result of performing a specified operation on the received signal strength of the BSS as a reference value;
  • the access point When the access point allows the associated site associated with itself to use the dynamic channel detection threshold, the access point sends one or more detection information used by the associated site and a dynamic corresponding to the one or more detection information Threshold parameter set.
  • a receiving terminal is provided by the embodiment of the present invention, where the receiving terminal includes:
  • the collecting unit is configured to collect detection information when the access point allows the associated site associated with itself to use the dynamic channel detection threshold;
  • the processing unit is configured to determine, according to the detection information, whether to use the dynamic channel detection threshold for channel detection.
  • the processing unit is further configured to determine, according to the detection information, whether the detection information used for performing channel detection using the dynamic channel detection threshold includes: receiving a basic service of the frame Set BSS identification information, uplink and downlink indication information of the received frame, neighboring area BSS received signal strength, and
  • the BSS receives at least one of the signal strengths.
  • the processing unit is further configured to determine, according to the detection information, whether the detection information used for performing channel detection using the dynamic channel detection threshold is the BSS identification information of the received frame, and the BSS identification information of the received frame. It is used to distinguish information of different BSSs and distinguish them by at least one of the following ways:
  • Manner 1 The physical layer preamble sequence of the radio frame is used to distinguish
  • the signaling layer of the MAC layer is controlled by the physical layer or media access of the radio frame.
  • the processing unit is further configured to determine, according to the detection information, whether the detection information used for channel detection by using the dynamic channel detection threshold is the uplink and downlink indication information of the received frame, and the uplink and downlink of the received frame.
  • the indication information is information for distinguishing the uplink and downlink of the frame; the frame includes an uplink frame and a downlink frame, where the uplink frame is a frame sent by the associated station to the access point; a frame sent to the associated site by the entry point;
  • the uplink and downlink information of the frame is distinguished by signaling of a physical layer or a MAC layer of a radio frame.
  • the processing unit is further configured to determine, according to the detection information, whether the detection information used when performing channel detection using the dynamic channel detection threshold is the received signal strength of the neighboring area BSS, and the neighboring area BSS receives the signal strength.
  • the processing unit is further configured to determine, according to the detection information, whether the detection information used when performing channel detection using the dynamic channel detection threshold is the received signal strength of the local BSS, and the received BSS received signal strength is The associated station receives the received signal strength of the BSS access point.
  • the receiving terminal further includes: a receiving unit, configured to receive the access point to be wide One or more pieces of detection information used by the associated site notified by the broadcast mode and a dynamic threshold parameter set corresponding to the one or more pieces of detected information.
  • a receiving unit configured to receive the access point to be wide One or more pieces of detection information used by the associated site notified by the broadcast mode and a dynamic threshold parameter set corresponding to the one or more pieces of detected information.
  • the receiving unit is further configured to receive a set including one or more parameters, where the set of one or more parameters is used as the dynamic threshold parameter set;
  • the receiving terminal further includes: a first determining unit, configured to determine a value of the dynamic detection threshold by using the dynamic threshold parameter set.
  • the processing unit is further configured to: when the detection information is the BSS identification information of the received frame, and identify that the BSS identification information indication of the received frame is a frame of the neighboring BSS, determine to use the dynamic threshold parameter.
  • the set is used as a dynamic channel detection threshold to perform the channel detection.
  • the processing unit is further configured to: when the detection information is the BSS identification information of the received frame, the received signal strength of the neighboring area BSS, and the received BSS received signal strength, the BSS identification information indicating that the received frame is indicated is a neighbor.
  • the frame of the BSS of the area is taken as the reference value by the received signal strength of the neighboring area BSS or the received signal strength of the BSS, or the result of the specified operation of the received signal strength of the neighboring area BSS and the received signal strength of the BSS is used as a reference value;
  • the reference value is compared with a threshold to obtain a comparison result, and the channel detection is performed by using the dynamic threshold parameter set as a dynamic channel detection threshold according to the comparison result.
  • the processing unit is further configured to: when the detection information is the BSS identification information of the received frame and the uplink and downlink indication information of the received frame, the BSS identification information indicating that the received frame is the frame of the neighboring BSS is determined. And when the uplink and downlink indication information of the received frame indicates that the current frame is an uplink frame, determining to use the dynamic threshold parameter set as a dynamic channel detection threshold to perform the channel detection.
  • the processing unit is further configured to: when the detection information is the BSS identification information of the received frame, the uplink and downlink indication information of the received frame, the received signal strength of the neighboring area BSS, and the received BSS received signal strength, the receiving is recognized.
  • the BSS identification information of the frame indicates that the frame is a frame of the neighboring area BSS
  • the uplink and downlink indication information of the received frame indicates that the current frame is an uplink frame, and the signal is received by the neighboring area BSS.
  • the collecting unit, the processing unit, the receiving unit, and the first determining unit may use a central processing unit (CPU), a digital signal processor (DSP, Digital Singnal Processor) when performing processing. ) or programmable logic array (FPGA, Field - Programmable Gate Array) implementation.
  • CPU central processing unit
  • DSP digital signal processor
  • FPGA Field - Programmable Gate Array
  • a transmitting terminal is provided by the embodiment of the present invention, where the sending terminal includes:
  • a sending unit configured to: when the access point allows the associated site associated with itself to use the dynamic channel detection threshold, send one or more detection information used by the associated site and dynamics corresponding to the one or more detection information Threshold parameter set.
  • the transmitting unit may implement the processing by using a central processing unit (CPU), a digital signal processor (DSP), or a Field-Programmable Gate Array (FPGA).
  • CPU central processing unit
  • DSP digital signal processor
  • FPGA Field-Programmable Gate Array
  • a system comprising the receiving terminal according to any one of the preceding claims, and the foregoing sending terminal.
  • the method of the embodiment of the present invention is: when the access point allows the associated site associated with the access node to use the dynamic channel detection threshold, the associated site collects the detection information; and the associated site determines whether to use the dynamic channel detection threshold according to the detection information.
  • Channel detection Using the method of the present invention, the associated station can determine whether to use the dynamic channel detection threshold for channel detection based on the detection information sent by the access point, thereby solving the problem of how to use the detection threshold for channel detection.
  • Figure 1 is a schematic diagram of an existing CCA detection mechanism
  • FIG. 2 is a flow chart of an implementation process of the method of the present invention
  • 3 is a schematic diagram of another implementation process of the method of the present invention
  • FIG. 4 is a schematic structural diagram of a receiving terminal of the present invention.
  • FIG. 5 is a schematic view showing the structure of the system of the present invention. detailed description
  • a dynamic channel detection threshold mechanism is introduced.
  • the main idea of the mechanism is: an associated site (such as an STA) associated with an access site (such as an AP).
  • a variable detection threshold can be employed when receiving a signal and determining if the channel is idle.
  • the associated site increases the channel detection threshold and masks signals below the detection threshold, which increases the transmission opportunity.
  • this dynamic detection threshold technique it will have a certain impact. If the associated sites use dynamic detection thresholds, simply raising their detection thresholds may result in excessive hidden associated sites and increased collision probability.
  • the novel dynamic channel detection threshold mechanism of the present invention includes the following contents:
  • a channel detecting method provided by the present invention includes the following steps:
  • Step 101 When the access point allows the associated site associated with itself to use the dynamic channel detection threshold, the associated site collects the detection information.
  • Step 102 The associated station determines, according to the detection information, whether to use the dynamic channel detection threshold to perform channel detection.
  • channel detection is performed using a dynamic channel detection threshold, which may be CCA channel detection using a dynamic channel detection threshold.
  • the detection information includes: a basic service set BSS identification information of a received frame, an uplink and downlink indication information of a received frame, and a neighboring area.
  • the BSS receives at least one of a signal strength and a strength of the BSS received signal.
  • the BSS identification information of the received frame is information used to distinguish different BSSs, and is distinguished by at least one of the following manners:
  • Manner 1 The physical layer preamble sequence of the radio frame is used to distinguish
  • Manner 2 The signaling layer of the MAC layer is controlled by the physical layer or media access of the radio frame.
  • the uplink and downlink indication information of the received frame is information for uplink and downlink of the subframe;
  • the frame includes an uplink frame and a downlink frame, where the uplink frame is a frame that is sent by the associated site to the access point; and the downlink frame is a frame that is sent by the access point to the associated site;
  • the uplink and downlink information of the frame is distinguished by signaling of a physical layer or a MAC layer of a radio frame.
  • the received signal strength of the neighboring area BSS is the received signal strength of the neighboring BSS access point received by the associated station and/or the neighboring area received by the associated station The received signal strength of the site associated with the point.
  • the received BSS received signal strength is the received signal strength of the BSS access point received by the associated station.
  • the associated station receives one or more detection information used by the associated site notified by the access point in a broadcast manner and a dynamic threshold parameter corresponding to the one or more detection information. set.
  • the dynamic threshold parameter set includes a set of one or more parameters
  • the method further includes: the associated site being able to determine dynamics using the dynamic threshold parameter set The value of the detection threshold.
  • the method further includes: the associated station indicating, to the access point, whether it supports capability information of a dynamic channel detection threshold.
  • the associated station determines, according to the detection information, whether to use the dynamic channel detection threshold to perform channel detection, including:
  • the associated station When the detection information is the BSS identification information of the received frame, the associated station identifies that the BSS identification information indication of the received frame is a frame of the neighboring BSS, and determines to use the dynamic threshold parameter set as a dynamic channel detection threshold. Performing the channel detection;
  • the BSS identification information of the received frame is information used to distinguish different BSSs, and is distinguished by at least one of the following manners:
  • Manner 1 The physical layer preamble sequence of the radio frame is used to distinguish
  • Manner 2 The signaling layer of the MAC layer is controlled by the physical layer or media access of the radio frame.
  • the associated station determines, according to the detection information, whether to use the dynamic channel detection threshold for channel detection, including:
  • the associated station identifies that the BSS identification information indication of the received frame is a frame of the neighboring BSS,
  • the neighboring area BSS receives the signal strength or the BSS received signal strength as a reference value, or uses the result of the specified operation of the neighboring BSS received signal strength and the BSS received signal strength as a reference value;
  • the comparison result includes but is not limited to : various results such as a reference value greater than a threshold or a reference value less than a threshold;
  • the BSS identification information of the received frame is information used to distinguish different BSSs, and is distinguished by at least one of the following manners: Manner 1: The physical layer preamble sequence of the radio frame is used to distinguish;
  • Manner 2 The signaling layer of the MAC layer is controlled by the physical layer or media access of the radio frame; the received signal strength of the neighboring BSS is the received signal strength or/and of the neighboring BSS access point received by the associated station. The received signal strength of the station associated with the neighboring access point received by the associated site;
  • the received signal strength of the BSS is the received signal strength of the BSS access point received by the associated station;
  • the specified operation includes: a difference between the mean value of the received signal strength of the neighboring area BSS and the mean value of the received signal strength of the BSS, and a ratio of the received signal strength of the neighboring area BSS to the average of the strength of the BSS received number.
  • the associated station determines, according to the detection information, whether to use the dynamic channel detection threshold for channel detection, including:
  • the associated station When the detection information is the BSS identification information of the received frame and the uplink and downlink indication information of the received frame, the associated station identifies that the BSS identification information of the received frame indicates a frame of the neighboring BSS, and the upper and lower sides of the received frame When the line indication information indicates that the current frame is an uplink frame, determining to use the dynamic threshold parameter set as a dynamic channel detection threshold to perform the channel detection;
  • the BSS identification information of the received frame is information used to distinguish different BSSs, and is distinguished by at least one of the following manners:
  • Manner 1 The physical layer preamble sequence of the radio frame is used to distinguish
  • the signaling layer of the MAC layer is controlled by the physical layer or the media access of the radio frame; the uplink and downlink indication information of the received frame is information for distinguishing uplink and downlink of the frame; and the frame includes an uplink frame and a downlink frame.
  • the uplink frame is a frame that is sent by the associated site to the access point; the downlink frame is a frame that is sent by the access point to the associated site; and a message that passes through a physical layer or a MAC layer of a radio frame
  • the information of the uplink and downlink of the frame is differentiated.
  • the associated station determines whether to use the dynamic channel detection threshold to perform channel detection according to the detection information, including: When the detection information is the BSS identification information of the received frame, the uplink and downlink indication information of the received frame, the received signal strength of the neighboring area BSS, and the received BSS received signal strength, the associated station identifies that the BSS identification information indication of the received frame is a frame of the neighboring area BSS, and the uplink and downlink indication information of the received frame indicates that the current frame is an uplink frame, and the received signal strength of the neighboring area BSS or the received signal strength of the BSS is used as a reference value, or the signal strength is received by the neighboring area BSS. And a result of performing a specified operation on the received signal strength of the BSS as a reference value;
  • the information is information for distinguishing different BSSs and is distinguished by at least one of the following ways:
  • Manner 1 The physical layer preamble sequence of the radio frame is used to distinguish
  • the signaling layer of the MAC layer is controlled by the physical layer or the media access of the radio frame; the uplink and downlink indication information of the received frame is information for distinguishing uplink and downlink of the frame; and the frame includes an uplink frame and a downlink frame.
  • the uplink frame is a frame that is sent by the associated site to the access point; the downlink frame is a frame that is sent by the access point to the associated site; and a message that passes through a physical layer or a MAC layer of a radio frame Differentiating the information of the uplink and downlink of the frame;
  • the received signal strength of the neighboring area BSS is the received signal strength of the neighboring BSS access point received by the associated station and/or the received signal strength of the station associated with the neighboring access point received by the associated station;
  • the received signal strength of the BSS is the received signal strength of the BSS access point received by the associated station;
  • the specified operation includes: a difference between the mean value of the received signal strength of the neighboring area BSS and the mean value of the received signal strength of the BSS, and a ratio of the received signal strength of the neighboring area BSS to the average of the strength of the BSS received number.
  • the present invention provides a channel detection method.
  • the method includes: when an access point allows an associated station associated with itself to use a dynamic channel detection threshold, the access point Notifying one or more detection information used by the associated site and a corresponding dynamic threshold parameter set.
  • an implementation process of the present invention including the interaction between the transmitting end and the receiving end is as shown in FIG. 3, and includes:
  • Step 201 The access point broadcasts the detection information of the dynamic detection threshold and the corresponding dynamic threshold parameter.
  • Step 203 The station uses a dynamic detection threshold or a fixed threshold according to the value of the detection information.
  • the present invention provides a receiving terminal, which may be an associated site associated with an access point, such as a STA. As shown in FIG. 4, the terminal includes:
  • the collecting unit 11 is configured to collect the detection information when the access point allows the associated site associated with the access node to use the dynamic channel detection threshold.
  • the processing unit 12 is configured to determine, according to the detection information, whether to use the dynamic channel detection threshold for channel detection.
  • the processing unit is further configured to: determine, according to the detection information, whether the detection information used for performing channel detection using the dynamic channel detection threshold includes: receiving a basic service set BSS identification information of the frame, And receiving at least one of uplink and downlink indication information of a frame, a received signal strength of a neighboring area BSS, and a received signal strength of the BSS.
  • the processing unit is further configured to determine, according to the detection information, whether the detection information used for performing channel detection using the dynamic channel detection threshold is the BSS identification information of the received frame,
  • the BSS identification information of the received frame is information for distinguishing different BSSs, and is distinguished by at least one of the following manners:
  • Manner 1 The physical layer preamble sequence of the radio frame is used to distinguish
  • the signaling layer of the MAC layer is controlled by the physical layer or media access of the radio frame.
  • the processing unit is further configured to determine, according to the detection information, whether the detection information used for performing channel detection using the dynamic channel detection threshold is the uplink and downlink indication information of the received frame.
  • the uplink and downlink indication information of the received frame is used to distinguish the frame Up and down information;
  • the frame includes an uplink frame and a downlink frame, where the uplink frame is a frame that is sent by the associated site to the access point; and the downlink frame is a frame that is sent by the access point to the associated site;
  • the uplink and downlink information of the frame is distinguished by signaling of a physical layer or a MAC layer of a radio frame.
  • the processing unit is further configured to determine, according to the detection information, whether the detection information used for performing channel detection using the dynamic channel detection threshold is the received signal strength of the neighboring area BSS,
  • the received signal strength of the neighboring area BSS is the received signal strength of the neighboring BSS access point received by the associated station and/or the received signal strength of the station associated with the neighboring access point received by the associated station.
  • the processing unit is further configured to determine, according to the detection information, whether the detection information used when performing channel detection using the dynamic channel detection threshold is the received signal strength of the local BSS, where the The received signal strength of the BSS is the received signal strength of the BSS access point received by the associated station.
  • the receiving terminal further includes: a receiving unit, configured to receive one or more detection information used by the associated site notified by the access point in a broadcast manner, and the one or more A set of dynamic threshold parameters corresponding to the detection information.
  • the receiving unit is further configured to receive a set including one or more parameters, where the set includes one or more parameters as the dynamic threshold parameter set;
  • the method includes: a first determining unit, configured to determine, by using the dynamic threshold parameter set, a value of a dynamic detection threshold.
  • the processing unit is further configured to: when the detection information is the BSS identification information of the received frame, and identify that the BSS identification information indication of the received frame is a frame of the neighboring BSS, determine The channel detection is performed using the dynamic threshold parameter set as a dynamic channel detection threshold. In a preferred embodiment of the present invention, the processing unit is further configured to: when the detection information is the BSS identification information of the received frame, the received signal strength of the neighboring area BSS, and the received signal strength of the BSS, the received frame is identified.
  • the BSS identification information indication is a frame of the neighboring area BSS, and the received signal strength of the neighboring area BSS or the received BSS received signal strength is used as a reference value, or the result of the specified operation is performed by the received signal strength of the neighboring area BSS and the received signal strength of the BSS.
  • a reference value comparing the reference value with a threshold value to obtain a comparison result, determining, according to the comparison result, using the dynamic threshold parameter set as a dynamic channel detection threshold to perform the channel detection.
  • the processing unit is further configured to: when the detection information is the BSS identification information of the received frame and the uplink and downlink indication information of the received frame, the BSS identification information indication that the received frame is identified is The frame of the neighboring area BSS, and the uplink and downlink indication information of the received frame indicates that the current frame is an uplink frame, and then determining to use the dynamic threshold parameter set as a dynamic channel detection threshold to perform the channel detection.
  • the processing unit is further configured to: when the detection information is the BSS identification information of the received frame, the uplink and downlink indication information of the received frame, the received signal strength of the neighboring area BSS, and the received signal strength of the BSS. And determining that the BSS identification information indication of the received frame is a frame of the neighboring area BSS, and the uplink and downlink indication information of the received frame indicates that the current frame is an uplink frame, and the signal strength of the neighboring area BSS or the received signal strength of the BSS is received.
  • a reference value or a result of performing a specified operation on the received signal strength of the neighboring area BSS and the received BSS received signal strength as a reference value; comparing the reference value with a threshold value to obtain a comparison result, according to the comparison result Determining to use the dynamic threshold parameter set as a dynamic channel detection threshold to perform the channel detection.
  • the invention provides a transmitting terminal, and the sending terminal can be an access point, such as an AP.
  • the terminal includes: a sending unit, configured to send one or more detection information used by the associated site and the one or more detection information when an access point allows an associated site associated with itself to use a dynamic channel detection threshold Corresponding dynamic threshold parameter set.
  • the present invention provides a system, wherein the system is provided by the receiving terminal and the transmitting terminal Composition, system structure diagram is shown in FIG. 5, wherein the receiving terminal is composed of a collecting unit 11 and a processing unit 12.
  • the collecting unit 11 is configured to receive the detection information when the access point allows the associated site associated with itself to use the dynamic channel detection threshold;
  • the processing unit 12 is configured to determine whether to use the dynamic channel detection threshold for channel detection according to the detection information.
  • the transmitting terminal is composed of a sending unit 21, and the sending unit 21 is configured to send one or more detection information used by the associated station and the one or more when the access point allows the associated station associated with itself to use the dynamic channel detection threshold.
  • a preferred embodiment of the system of the present invention consists of a combination of the preferred embodiments of the receiving terminal and the transmitting terminal described above, and is not described herein.
  • the associated station can collect the detection information according to the detection information broadcasted by the access point, and determine whether to use the dynamic channel detection threshold according to the result of the collected detection information, and corresponding corresponding information that should be used.
  • the dynamic threshold parameter set improves channel utilization and improves system throughput.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • the STA indicates whether it supports the capability information of the dynamic channel detection threshold in the Probe Request frame or the association request message sent by itself.
  • the AP allows the STA associated with the AP to use the dynamic channel detection threshold, the AP notifies its capability information in the Beacon, Probe Response frame, or the association response message sent to the STA, indicating that it supports the dynamic channel detection threshold.
  • the AP broadcast STA uses one or more detection information used when the dynamic detection threshold is used, and a threshold parameter set corresponding to the detection information.
  • the detection information is BSS identification information of the received frame, uplink and downlink indication information of the received frame, neighboring BSS received signal strength, and the present BSS received signal strength.
  • the AP may perform the notification of the detection information and the corresponding threshold parameter set in the manner as shown in Table 1.
  • Table 1 provides examples of the parameters of the detection information as follows:
  • the threshold parameter set used for detecting information is the BSS identification information of the received frame.
  • the frame dynamic threshold parameter set of the neighboring BSS of the BSS is the BSS identification information of the frame fixed threshold of the BSS, and the upper frame dynamic threshold parameter set of the BSS is received.
  • Line indication
  • BSS identification information of the received frame with the BSS frame of the neighboring area, and the BSS dynamic threshold parameter set of the neighboring area and the received signal strength of the neighboring area BSS, the received signal strength, and the BSS connection.
  • the BSS receives the signal strength, or the received signal strength, or the neighboring BSS
  • the neighboring area BSS receives the signal strength and the received signal strength and the BSS
  • the result is greater than the value of the other fixed threshold.
  • the specific operation result of the signal strength is larger than the other values.
  • the associated station that supports the dynamic channel detection threshold receives the capability information of the AP, and learns that the AP supports the dynamic channel detection threshold, and the associated station performs detection information according to the detection information parameter broadcast by the AP. Collect, and based on the result of the detection information, determine whether to use the dynamic threshold parameter set.
  • the dynamic threshold parameter set here contains one or more parameters, which can be used to determine the value of the dynamic detection threshold.
  • the parameter set includes a dynamic detection threshold upper limit value and/or a lower limit value, and a margin value, which may also include a transmit power range value, a MCS (Modulation and Coding Scheme) range value, and use this one.
  • multiple parameters can determine the dynamic detection threshold to be used by the current STA, and the one or more parameters can be adjusted according to the situation.
  • the fixed threshold refers to the channel detection threshold used in the prior art.
  • the BSS identification information of the received frame refers to information used to distinguish different BSSs. For example, if different frames of the BSS use different preamble sequences, the STA may parse the preamble sequence of the frame through the physical layer after receiving the frame. It is known whether it is the frame of this BSS or the frame of other BSS. Or, the frames of different BSSs are distinguished by the signal signaling domain of the physical layer or the indication information carried in the MAC layer signaling domain. After receiving the frame, the STA can obtain the frame of the BSS by using the parsing signaling domain. Other BSS frames.
  • the associated station uses the BSS identification information of the received frame as the detection information
  • the BSS identification information indicating the received frame indicates that the frame is a frame of the neighboring BSS
  • the dynamic threshold parameter level is used as the detection threshold
  • the BSS of the received frame is identified
  • the fixed threshold is still used as the detection threshold.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the associated station uses the BSS identification information of the received frame, the neighboring BSS receives the signal strength, the BSS received signal strength, or the neighboring BSS received signal strength and the locality.
  • the BSS receives the specific operation result of the signal strength as the detection information.
  • the received signal strength of the neighboring area BSS is the received signal strength of the signal sent by the AP or the STA of the neighboring area BSS, for example, the value of the RSSI (eceived Signal Strength Indication) of the Beacon sent by the STA to the neighboring area AP, or Received a signal from the neighboring STA
  • the value of the RSSI, the received signal strength of the BSS refers to the value of the received signal strength RSSI of the Beacon sent by the STA to the AP of the BSS.
  • the RSSI measurement is a periodic or continuous process.
  • the STA may use the RSSI of the Beacon of the AP as a reference value to measure the RSSI of the Beacon of the AP for a period of time.
  • Mean when the average value is greater than the set threshold, the dynamic threshold parameter set is used. When the average value is less than the set threshold, a fixed threshold is used.
  • the STA uses the RSSI mean value of the Beacon of the AP in the neighboring BSS, or the RSSI mean of the neighboring STA signal as the reference value, which is similar to the above manner, and will not be described again.
  • the STA may also use the result of performing a specific operation on the signal strength of the neighboring area BSS and the received signal strength of the BSS as a reference value, and the specific operation may be: the average value of the received signal strength of the neighboring area BSS and the average of the received signal strength of the BSS. The difference, the ratio of the neighboring BSS received signal strength to the average of the BSS received number strength, and so on.
  • the STA receives a radio frame
  • the BSS identification information of the received frame is identified as the frame of the BSS, and the neighboring BSS received signal strength and the BSS received signal strength perform a specific operation.
  • the operation result is greater than the threshold, the dynamic threshold is used. Parameter set, when the result of the operation is less than the threshold, a fixed threshold is used.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • the associated station uses the BSS identification information of the received frame and the uplink and downlink indication information of the received frame as the detection information.
  • the associated station receives a frame, first determines whether it is a frame of the neighboring BSS according to the BSS identification information of the frame, and determines whether the current frame is an uplink frame or a downlink frame of the neighboring BSS according to the uplink and downlink indication information of the received frame, when the frame is a neighbor
  • the dynamic channel detection threshold is used.
  • Embodiment 4 is a diagrammatic representation of Embodiment 4:
  • the associated station receives the BSS identification information of the frame, and receives the uplink and downlink fingers of the frame.
  • the information, the neighboring area BSS received signal strength, the current BSS received signal strength, or the neighboring BSS received signal strength and the BSS received signal strength specific operation result as detection information.
  • the ASB determines the BSS identification information of the received frame and the uplink and downlink indication information.
  • the STA may use the RSSI of the Beacon of the AP as a reference value. Measure the average RSSI value of the Beacon of the AP for a period of time. When the average value is greater than the set threshold, use the dynamic threshold parameter set. When the average value is less than the set threshold, use a fixed threshold. Alternatively, the STA uses the RSSI average of the Beacon of the neighboring BSS, or the received RSSI of the neighbor STA signal as a reference value.
  • the dynamic threshold parameter set When the average is greater than the set threshold, the dynamic threshold parameter set is used, and the average value is less than the set. Set the threshold and use a fixed threshold.
  • the STA may also use the result of the specific operation of the signal strength of the neighboring area BSS and the received signal strength of the BSS as a reference value.
  • the operation result is greater than the threshold, the dynamic threshold parameter set is used, and when the operation result is less than the threshold, the STA is fixed. Threshold.
  • the integrated modules described in the embodiments of the present invention may also be stored in a computer readable storage medium if they are implemented in the form of software functional modules and sold or used as separate products. Based on such understanding, the technical solution of the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product.
  • the computer software product is stored in a storage medium and includes a plurality of instructions.
  • a computer device (which may be a personal computer, server, or network device, etc.) is implemented to perform all or part of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a USB flash drive, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like.
  • ROM read-only memory
  • RAM random access memory
  • magnetic disk or an optical disk and the like.
  • the embodiment of the present invention further provides a computer storage medium, wherein a computer program is stored, and the computer program is used to execute the channel detection method of the embodiment of the present invention.
  • the method of the present invention is that when the access point allows the associated site associated with itself to use the dynamic channel detection threshold, the associated site collects detection information; and the associated site determines whether to use the dynamic channel detection threshold for channel detection according to the detection information. .
  • the associated station can determine whether to use the dynamic channel detection threshold for channel detection based on the detection information sent by the access point, thereby solving the problem of how to use the detection threshold for channel detection.

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Abstract

本发明提供了一种信道检测方法、终端及系统，其中，所述方法包括：当接入点允许和自己关联的关联站点使用动态信道检测门限时，所述关联站点收集检测信息（101）；所述关联站点根据所述检测信息判断是否使用动态信道检测门限进行信道检测（102）。

Description

一种信道检测方法、 终端及系统 技术领域
本发明涉及无线通信领域的检测技术， 尤其涉及一种信道检测方法、 终端及系统。 背景技术
本申请发明人在实现本申请实施例技术方案的过程中， 至少发现现有 技术中存在如下技术问题：
在无线通信技术中， 根据 IEEE 802.11标准的无线局域网 （ WLAN ) 已 成为最广泛使用的， 不仅用于各种专用环境， 以使膝上型电脑、 手持设备 和移动终端， 还考虑作为在蜂窝网 3GPP系统中与因特网的热点接入技术。 IEEE802.il工作组先后定义了 802. lla， 802.11b, 802. llg等一系列 WLAN 技术标准， 随后又陆续出现了其他任务组， 致力于发展涉及现有 802.11技 术改进的规范， 例如， 802.11η任务组提出高吞吐量（HT， High throughput ) 的要求， 支持高达 600Mbps的数据速率。 802.11ac任务组提出非常高吞吐 量（VHT， Very High throughput )的概念， 将数据速率提升到 lGbps， 其他 802.11 系列协议还包括支持工作在 60 GHz的 802.11ad， 以及支持工作在 1GHz以下的 802.11ah。
802.11中， 一个接入站点 （AP， Access Point ) 以及与 AP关联的多个 非接入关联站点（ STA， non-AP Station )组成了一个基本服务集（ BSS， Basic Service Set )。 目前 802.11支持虚拟载波检测和物理载波检测两种信道空闲 判定方法， 当虚拟载波检测和物理载波检测都判定信道空闲， 关联站点才 能够进行竟争发送。 所谓虚拟载波检测， 是指除了通信双方之外的第三方 关联站点， 当收到接收地址不是自己的无线帧时， 根据帧中的连续时间 ( Duration )域设置本地网络分配矢量（NAV， Network Allocation Vector ) 的值， 当 NAV不为零时， 认为信道繁忙， 不进行竟争发送。 物理载波检测 是指空闲信道估计（CCA， Clear Channel Assessment )信道检测技术， 关联 站点通过对媒介上的信号强度进行检测， 判定信道是忙碌还是空闲。 具体 来说， 关联站点对不同的信道带宽设置不同的检测门限， 例如对 20MHz信 道， 关联站点设置的信号检测门限是 -82dBm， 对 40MHz信道， 关联站点设 置的信号检测门限是 -79dBm。在 20MHz信道上， 当判断收到的信号是一个 802.11信号且强度大于 -82dBm时， 则认为此信道繁忙， 关联站点的物理层 发送信道状态是繁忙的指示给媒体接入控制（MAC， Media Access Control ) 层。 当收到的信号是 802.11信号且强度小于 -82dBm时， 则认为信道空闲， 关联站点的物理层会发送信道状态空闲的指示给 MAC层。
现有 CCA存在如下问题： 如图 1所示， STA1和 API关联， STA2和 AP2关联，图示标明了他们之间的接收信号强度。 STA1向 API进行发送时， STA2接收到 STA1的信号， 且该信号强度高于检测门限 -82dBm， 则 STA2 认为信道繁忙， 因此不会向 AP2进行发送， 而实际上 STA2如果给 AP2发 送信号， 由于 STA2到达 API的信号强度远远低于 STA1到 API的信号强 度， 因此不会对 API的接收造成干扰，且 AP2可以成功接收 STA2的信号。 可以看到， 过高的 CCA检测门限对 STA2造成了信道繁忙的检测结果， 降 低了 STA2的发送机会。
综上所述， 基于上述固定门限的 CCA技术用于信道检测会存在问题， 目前提出的动态信道检测门限机制， 虽然釆用可变的检测门限用于信道检 测能增加发送机会， 但是一味的釆用可变的检测门限也会存在问题， 也就 是说， 无论是釆用固定检测门限还是一味釆用动态信道检测门限都同样存 在问题。 相关技术中， 对于如何将检测门限用于信道检测的问题， 尚无有 效解决方案。 发明内容
有鉴于此， 本发明希望提供一种信道检测方法、 设备及系统， 至少解 决了如何将检测门限用于信道检测的问题。
本发明的技术方案是这样实现的：
本发明实施例提供的一种信道检测方法， 所述方法包括：
当接入点允许和自己关联的关联站点使用动态信道检测门限时， 所述 关联站点收集检测信息；
所述关联站点根据所述检测信息判断是否使用动态信道检测门限进行 信道检测。
优选地， 所述检测信息包括： 接收帧的基本服务集 BSS识别信息、 接 收帧的上下行指示信息、 邻区 BSS接收信号强度、 本 BSS接收信号强度中 的至少一种信息。
优选地， 所述接收帧的 BSS识别信息为用于区分不同 BSS的信息， 并 通过以下方式中的至少一种方式进行区分：
方式一： 通过无线帧的物理层前导码序列来区分；
方式二： 通过无线帧的物理层或媒体接入控制 MAC层的信令区分。 优选地， 所述接收帧的上下行指示信息为用于区分帧的上下行的信息； 所述帧包括上行帧和下行帧， 所述上行帧为所述关联站点发给所述接 入点的帧； 所述下行帧为所述接入点发给所述关联站点的帧；
通过无线帧的物理层或 MAC 层的信令对所述帧的上下行的信息进行 区分。
优选地， 所述邻区 BSS接收信号强度为所述关联站点收到的邻区 BSS 接入点的接收信号强度和 /或所述关联站点收到的和邻区接入点关联的站点 的接收信号强度。
优选地， 所述本 BSS接收信号强度为所述关联站点收到本 BSS接入点 的接收信号强度。
优选地， 所述关联站点接收接入点以广播方式通知的所述关联站点使 用的一个或多个检测信息及与所述一个或多个检测信息相对应的动态门限 参数集。
优选地， 所述动态门限参数集包括一个或多个参数的集合；
所述方法还包括： 所述关联站点能使用所述动态门限参数集确定动态 检测门限的取值。
优选地， 所述方法还包括： 所述关联站点向所述接入点指示自己是否 支持动态信道检测门限的能力信息。
优选地， 所述关联站点根据所述检测信息判断是否使用动态信道检测 门限进行信道检测， 包括：
所述检测信息为接收帧的 BSS识别信息时， 所述关联站点识别到所述 接收帧的 BSS识别信息指示是邻区 BSS的帧， 则确定使用所述动态门限参 数集作为动态信道检测门限来进行所述信道检测。
优选地， 所述关联站点根据所述检测信息判断是否使用动态信道检测 门限进行信道检测， 包括：
所述检测信息为接收帧的 BSS识别信息、 邻区 BSS接收信号强度、 本 BSS接收信号强度时， 所述关联站点识别到所述接收帧的 BSS识别信息指 示是邻区 BSS的帧，则以邻区 BSS接收信号强度或本 BSS接收信号强度作 为参考值， 或者， 以邻区 BSS接收信号强度与本 BSS接收信号强度的进行 指定运算的结果作为参考值；
将所述参考值与阈值进行比对得到比对结果， 根据所述比对结果确定 使用所述动态门限参数集作为动态信道检测门限来进行所述信道检测。
优选地， 所述关联站点根据所述检测信息判断如何使用动态信道检测 门限进行信道检测， 包括： 所述检测信息为接收帧的 BSS识别信息、接收帧的上下行指示信息时， 所述关联站点识别到所述接收帧的 BSS识别信息指示是邻区 BSS的帧， 且 所述接收帧的上下行指示信息指示本帧是上行帧时， 则确定使用所述动态 门限参数集作为动态信道检测门限来进行所述信道检测。
优选地， 所述关联站点根据所述检测信息判断如何使用动态信道检测 门限进行信道检测， 包括：
所述检测信息为接收帧的 BSS识别信息、 接收帧的上下行指示信息、 邻区 BSS接收信号强度、 本 BSS接收信号强度时， 所述关联站点识别到所 述接收帧的 BSS识别信息指示是邻区 BSS的帧， 且所述接收帧的上下行指 示信息指示本帧是上行帧， 则以邻区 BSS接收信号强度或本 BSS接收信号 强度作为参考值， 或者， 以邻区 BSS接收信号强度与本 BSS接收信号强度 的进行指定运算的结果作为参考值；
将所述参考值与阈值进行比对得到比对结果， 根据所述比对结果确定 使用所述动态门限参数集作为动态信道检测门限来进行所述信道检测。
本发明实施例提供的一种信道检测方法， 所述方法包括：
当接入点允许和自己关联的关联站点使用动态信道检测门限时， 所述 接入点发送所述关联站点使用的一个或多个检测信息及与所述一个或多个 检测信息相对应的动态门限参数集。
本发明实施例提供的一种接收终端， 所述接收终端包括：
收集单元， 配置为当接入点允许和自己关联的关联站点使用动态信道 检测门限时收集检测信息；
处理单元， 配置为根据所述检测信息判断是否使用动态信道检测门限 进行信道检测。
优选地， 所述处理单元， 还配置为根据所述检测信息判断是否使用动 态信道检测门限进行信道检测时釆用的检测信息包括： 接收帧的基本服务 集 BSS识别信息、 接收帧的上下行指示信息、 邻区 BSS接收信号强度、 本
BSS接收信号强度中的至少一种信息。
优选地， 所述处理单元， 还配置为根据所述检测信息判断是否使用动 态信道检测门限进行信道检测时釆用的检测信息为所述接收帧的 BSS识别 信息， 所述接收帧的 BSS识别信息为用于区分不同 BSS的信息， 并通过以 下方式中的至少一种方式进行区分：
方式一： 通过无线帧的物理层前导码序列来区分；
方式二： 通过无线帧的物理层或媒体接入控制 MAC层的信令区分。 优选地， 所述处理单元， 还配置为根据所述检测信息判断是否使用动 态信道检测门限进行信道检测时釆用的检测信息为所述接收帧的上下行指 示信息， 所述接收帧的上下行指示信息为用于区分帧的上下行的信息； 所述帧包括上行帧和下行帧， 所述上行帧为所述关联站点发给所述接 入点的帧； 所述下行帧为所述接入点发给所述关联站点的帧；
通过无线帧的物理层或 MAC 层的信令对所述帧的上下行的信息进行 区分。
优选地， 所述处理单元， 还配置为根据所述检测信息判断是否使用动 态信道检测门限进行信道检测时釆用的检测信息为所述邻区 BSS接收信号 强度， 所述邻区 BSS接收信号强度为所述关联站点收到的邻区 BSS接入点 的接收信号强度和 /或所述关联站点收到的和邻区接入点关联的站点的接收 信号强度。
优选地， 所述处理单元， 还配置为根据所述检测信息判断是否使用动 态信道检测门限进行信道检测时釆用的检测信息为所述本 BSS接收信号强 度， 所述本 BSS接收信号强度为所述关联站点收到本 BSS接入点的接收信 号强度。
优选地， 所述接收终端还包括： 接收单元， 还配置为接收接入点以广 播方式通知的所述关联站点使用的一个或多个检测信息及与所述一个或多 个检测信息相对应的动态门限参数集。
优选地， 所述接收单元， 还配置为接收包括一个或多个参数的集合， 所述包括一个或多个参数的集合作为所述动态门限参数集；
所述接收终端还包括： 第一确定单元， 配置为使用所述动态门限参数 集确定动态检测门限的取值。
优选地， 所述处理单元， 还配置为所述检测信息为接收帧的 BSS识别 信息时， 识别到所述接收帧的 BSS识别信息指示是邻区 BSS的帧， 则确定 使用所述动态门限参数集作为动态信道检测门限来进行所述信道检测。
优选地， 所述处理单元， 还配置为所述检测信息为接收帧的 BSS识别 信息、 邻区 BSS接收信号强度、 本 BSS接收信号强度时， 识别到所述接收 帧的 BSS识别信息指示是邻区 BSS的帧，则以邻区 BSS接收信号强度或本 BSS接收信号强度作为参考值， 或者， 以邻区 BSS接收信号强度与本 BSS 接收信号强度的进行指定运算的结果作为参考值； 将所述参考值与阈值进 行比对得到比对结果， 根据所述比对结果确定使用所述动态门限参数集作 为动态信道检测门限来进行所述信道检测。
优选地， 所述处理单元， 还配置为所述检测信息为接收帧的 BSS识别 信息、 接收帧的上下行指示信息时， 识别到所述接收帧的 BSS识别信息指 示是邻区 BSS的帧，且所述接收帧的上下行指示信息指示本帧是上行帧时， 则确定使用所述动态门限参数集作为动态信道检测门限来进行所述信道检 测。
优选地， 所述处理单元， 还配置为所述检测信息为接收帧的 BSS识别 信息、 接收帧的上下行指示信息、 邻区 BSS接收信号强度、 本 BSS接收信 号强度时， 识别到所述接收帧的 BSS识别信息指示是邻区 BSS的帧， 且所 述接收帧的上下行指示信息指示本帧是上行帧， 则以邻区 BSS接收信号强 度或本 BSS接收信号强度作为参考值， 或者， 以邻区 BSS接收信号强度与 本 BSS接收信号强度的进行指定运算的结果作为参考值； 将所述参考值与 阈值进行比对得到比对结果， 根据所述比对结果确定使用所述动态门限参 数集作为动态信道检测门限来进行所述信道检测。
所述收集单元、 所述处理单元、 所述接收单元、 所述第一确定单元在 执行处理时， 可以釆用中央处理器（CPU， Central Processing Unit ), 数字 信号处理器（DSP， Digital Singnal Processor )或可编程逻辑阵列 （FPGA， Field - Programmable Gate Array ) 实现。
本发明实施例提供的一种发送终端， 所述发送终端包括：
发送单元， 配置为当接入点允许和自己关联的关联站点使用动态信道 检测门限时， 发送所述关联站点使用的一个或多个检测信息及与所述一个 或多个检测信息相对应的动态门限参数集。
所述发送单元在执行处理时， 可以釆用中央处理器 （ CPU， Central Processing Unit )、 数字信号处理器（DSP， Digital Singnal Processor )或可 编程逻辑阵列 （FPGA， Field - Programmable Gate Array ) 实现。
本发明实施例提供的一种系统， 所述系统包括上述任一项所述的接收 终端、 及上述的发送终端。
本发明实施例的方法是当接入点允许和自己关联的关联站点使用动态 信道检测门限时， 所述关联站点收集检测信息； 所述关联站点根据所述检 测信息判断是否使用动态信道检测门限进行信道检测。 釆用本发明的方法， 关联站点能根据接入点发送的检测信息判断是否使用动态信道检测门限进 行信道检测， 从而， 解决了如何使用检测门限用于信道检测的问题。 附图说明
图 1 为现有 CCA检测机制示意图；
图 2为本发明方法的一实现流程流程图； 图 3为本发明方法的另一实现流程示意图;
图 4为本发明接收终端的组成结构示意图;
图 5为本发明系统的组成结构示意图。 具体实施方式
下面结合附图对技术方案的实施作进一步的详细描述。
由于现有技术利用固定门限的 CCA技术用于信道检测会存在问题， 因 此， 引入动态信道检测门限机制， 该机制的主要思想是： 与接入站点 （如 AP )相关联的关联站点 （如 STA )在接收信号并判定信道是否空闲时可以 釆用可变的检测门限。 关联站点提高信道检测门限， 屏蔽了低于检测门限 的信号， 可以增加发送机会。 然而， 若一味釆用该动态检测门限技术也会 造成一定的影响。 如果关联站点都釆用动态检测门限， 一味提升自己的检 测门限， 可能导致过多的隐藏关联站点， 增加碰撞概率。
另外， 如果同一接入关联站点下存在不支持该功能的关联站点， 那么 支持该功能的关联站点和不支持该功能的关联站点对信道空闲与否的判定 是不一致的， 可能导致两类关联站点在信道接入的公平性上存在问题。
可见， 无论是釆用固定检测门限还是一味釆用动态信道检测门限都同 样存在问题， 对于如何使用检测门限用于信道检测的问题， 尤其是终端对 动态信道检测门限如何使用的问题， 本发明提出了一种新型的动态信道检 测门限机制。 本发明新型的动态信道检测门限机制包括以下内容：
本发明提供的一种信道检测方法， 就接收端而言， 如图 2所示， 包括 以下步骤：
步骤 101、当接入点允许和自己关联的关联站点使用动态信道检测门限 时， 所述关联站点收集检测信息。
步骤 102、所述关联站点根据所述检测信息判断是否使用动态信道检测 门限进行信道检测。 这里， 使用动态信道检测门限进行信道检测， 可以是使用动态信道检 测门限进行 CCA信道检测。 在本发明一优选实施方式中， 所述检测信息包 括： 接收帧的基本服务集 BSS识别信息、 接收帧的上下行指示信息、 邻区
BSS接收信号强度、 本 BSS接收信号强度中的至少一种信息。
在本发明一优选实施方式中， 所述接收帧的 BSS识别信息为用于区分 不同 BSS的信息， 并通过以下方式中的至少一种方式进行区分：
方式一： 通过无线帧的物理层前导码序列来区分；
方式二： 通过无线帧的物理层或媒体接入控制 MAC层的信令区分。 在本发明一优选实施方式中， 所述接收帧的上下行指示信息为用于区 分帧的上下行的信息；
所述帧包括上行帧和下行帧， 所述上行帧为所述关联站点发给所述接 入点的帧； 所述下行帧为所述接入点发给所述关联站点的帧；
通过无线帧的物理层或 MAC 层的信令对所述帧的上下行的信息进行 区分。
在本发明一优选实施方式中， 所述邻区 BSS接收信号强度为所述关联 站点收到的邻区 BSS接入点的接收信号强度和 /或所述关联站点收到的和邻 区接入点关联的站点的接收信号强度。
在本发明一优选实施方式中， 所述本 BSS接收信号强度为所述关联站 点收到本 BSS接入点的接收信号强度。
在本发明一优选实施方式中， 所述关联站点接收接入点以广播方式通 知的所述关联站点使用的一个或多个检测信息及与所述一个或多个检测信 息相对应的动态门限参数集。
在本发明一优选实施方式中， 所述动态门限参数集包括一个或多个参 数的集合；
所述方法还包括： 所述关联站点能使用所述动态门限参数集确定动态 检测门限的取值。
在本发明一优选实施方式中， 所述方法还包括： 所述关联站点向所述 接入点指示自己是否支持动态信道检测门限的能力信息。
在本发明一优选实施方式中， 所述关联站点根据所述检测信息判断是 否使用动态信道检测门限进行信道检测， 包括：
所述检测信息为接收帧的 BSS识别信息时， 所述关联站点识别到所述 接收帧的 BSS识别信息指示是邻区 BSS的帧， 则确定使用所述动态门限参 数集作为动态信道检测门限来进行所述信道检测；
其中， 所述接收帧的 BSS识别信息为用于区分不同 BSS的信息， 并通 过以下方式中的至少一种方式进行区分：
方式一： 通过无线帧的物理层前导码序列来区分；
方式二： 通过无线帧的物理层或媒体接入控制 MAC层的信令区分。 在本发明一优选实施方式中， 所述关联站点根据所述检测信息判断是 否使用动态信道检测门限进行信道检测， 包括：
所述检测信息为接收帧的 BSS识别信息、 邻区 BSS接收信号强度、 本 BSS接收信号强度时， 所述关联站点识别到所述接收帧的 BSS识别信息指 示是邻区 BSS的帧，则以邻区 BSS接收信号强度或本 BSS接收信号强度作 为参考值， 或者， 以邻区 BSS接收信号强度与本 BSS接收信号强度的进行 指定运算的结果作为参考值；
将所述参考值与阈值进行比对得到比对结果， 根据所述比对结果确定 使用所述动态门限参数集作为动态信道检测门限来进行所述信道检测； 所 述比对结果包括但不限于： 参考值大于阈值、 或者参考值小于阈值等各种 结果；
其中， 所述接收帧的 BSS识别信息为用于区分不同 BSS的信息， 并通 过以下方式中的至少一种方式进行区分： 方式一： 通过无线帧的物理层前导码序列来区分；
方式二： 通过无线帧的物理层或媒体接入控制 MAC层的信令区分； 所述邻区 BSS接收信号强度为所述关联站点收到的邻区 BSS接入点的 接收信号强度或 /和所述关联站点收到的和邻区接入点关联的站点的接收信 号强度；
所述本 BSS接收信号强度为所述关联站点收到本 BSS接入点的接收信 号强度；
所述指定运算包括： 邻区 BSS接收信号强度均值与本 BSS接收信号强 度均值的差值、 邻区 BSS接收信号强度与本 BSS接收号强度均值的比值。
在本发明一优选实施方式中， 所述关联站点根据所述检测信息判断是 否使用动态信道检测门限进行信道检测， 包括：
所述检测信息为接收帧的 BSS识别信息、接收帧的上下行指示信息时， 所述关联站点识别到所述接收帧的 BSS识别信息指示是邻区 BSS的帧， 且 所述接收帧的上下行指示信息指示本帧是上行帧时， 则确定使用所述动态 门限参数集作为动态信道检测门限来进行所述信道检测；
其中， 所述接收帧的 BSS识别信息为用于区分不同 BSS的信息， 并通 过以下方式中的至少一种方式进行区分：
方式一： 通过无线帧的物理层前导码序列来区分；
方式二： 通过无线帧的物理层或媒体接入控制 MAC层的信令区分； 所述接收帧的上下行指示信息为用于区分帧的上下行的信息； 所述帧包括上行帧和下行帧， 所述上行帧为所述关联站点发给所述接 入点的帧； 所述下行帧为所述接入点发给所述关联站点的帧； 通过无线帧 的物理层或 MAC层的信令对所述帧的上下行的信息进行区分。
在本发明一优选实施方式中， 所述关联站点根据所述检测信息判断是 否使用动态信道检测门限进行信道检测， 包括： 所述检测信息为接收帧的 BSS识别信息、 接收帧的上下行指示信息、 邻区 BSS接收信号强度、 本 BSS接收信号强度时， 所述关联站点识别到所 述接收帧的 BSS识别信息指示是邻区 BSS的帧， 且所述接收帧的上下行指 示信息指示本帧是上行帧， 则以邻区 BSS接收信号强度或本 BSS接收信号 强度作为参考值， 或者， 以邻区 BSS接收信号强度与本 BSS接收信号强度 的进行指定运算的结果作为参考值；
将所述参考值与阈值进行比对得到比对结果， 根据所述比对结果确定 使用所述动态门限参数集作为动态信道检测门限来进行所述信道检测； 其中， 所述接收帧的 BSS识别信息为用于区分不同 BSS的信息， 并通 过以下方式中的至少一种方式进行区分：
方式一： 通过无线帧的物理层前导码序列来区分；
方式二： 通过无线帧的物理层或媒体接入控制 MAC层的信令区分； 所述接收帧的上下行指示信息为用于区分帧的上下行的信息； 所述帧包括上行帧和下行帧， 所述上行帧为所述关联站点发给所述接 入点的帧； 所述下行帧为所述接入点发给所述关联站点的帧； 通过无线帧 的物理层或 MAC层的信令对所述帧的上下行的信息进行区分；
所述邻区 BSS接收信号强度为所述关联站点收到的邻区 BSS接入点的 接收信号强度和 /或所述关联站点收到的和邻区接入点关联的站点的接收信 号强度；
所述本 BSS接收信号强度为所述关联站点收到本 BSS接入点的接收信 号强度；
所述指定运算包括： 邻区 BSS接收信号强度均值与本 BSS接收信号强 度均值的差值、 邻区 BSS接收信号强度与本 BSS接收号强度均值的比值。
本发明提供的一种信道检测方法， 就发送端而言， 所述方法包括： 当 接入点允许和自己关联的关联站点使用动态信道检测门限时， 所述接入点 通知所述关联站点使用的一个或多个检测信息及对应的动态门限参数集。 结合本发送端的步骤及上述接收端的步骤， 本发明一个包括发送端和 接收端交互的实现流程如图 3所示， 包括：
步骤 201、接入点广播动态检测门限的检测信息及对应的动态门限参数 步骤 202、 站点根据接入点的广播收集检测信息。
步骤 203、 站点根据检测信息的取值， 釆用动态检测门限或固定门限。 本发明提供的一种接收终端， 所述终端可以为与接入点相关联的关联 站点， 如 STA。 如图 4所述， 所述终端包括：
收集单元 11， 配置为当接入点允许和自己关联的关联站点使用动态信 道检测门限时收集检测信息； 处理单元 12， 配置为根据所述检测信息判断 是否使用动态信道检测门限进行信道检测。
在本发明一优选实施方式中， 所述处理单元， 还配置为根据所述检测 信息判断是否使用动态信道检测门限进行信道检测时釆用的检测信息包 括： 接收帧的基本服务集 BSS识别信息、 接收帧的上下行指示信息、 邻区 BSS接收信号强度、 本 BSS接收信号强度中的至少一种信息。
在本发明一优选实施方式中， 所述处理单元， 还配置为根据所述检测 信息判断是否使用动态信道检测门限进行信道检测时釆用的检测信息为所 述接收帧的 BSS识别信息， 所述接收帧的 BSS识别信息为用于区分不同 BSS的信息， 并通过以下方式中的至少一种方式进行区分：
方式一： 通过无线帧的物理层前导码序列来区分；
方式二： 通过无线帧的物理层或媒体接入控制 MAC层的信令区分。 在本发明一优选实施方式中， 所述处理单元， 还配置为根据所述检测 信息判断是否使用动态信道检测门限进行信道检测时釆用的检测信息为所 述接收帧的上下行指示信息， 所述接收帧的上下行指示信息为用于区分帧 的上下行的信息；
所述帧包括上行帧和下行帧， 所述上行帧为所述关联站点发给所述接 入点的帧； 所述下行帧为所述接入点发给所述关联站点的帧；
通过无线帧的物理层或 MAC 层的信令对所述帧的上下行的信息进行 区分。
在本发明一优选实施方式中， 所述处理单元， 还配置为根据所述检测 信息判断是否使用动态信道检测门限进行信道检测时釆用的检测信息为所 述邻区 BSS接收信号强度， 所述邻区 BSS接收信号强度为所述关联站点收 到的邻区 BSS接入点的接收信号强度和 /或所述关联站点收到的和邻区接入 点关联的站点的接收信号强度。
在本发明一优选实施方式中， 所述处理单元， 还配置为根据所述检测 信息判断是否使用动态信道检测门限进行信道检测时釆用的检测信息为所 述本 BSS接收信号强度， 所述本 BSS接收信号强度为所述关联站点收到本 BSS接入点的接收信号强度。
在本发明一优选实施方式中， 所述接收终端还包括： 接收单元， 还配 置为接收接入点以广播方式通知的所述关联站点使用的一个或多个检测信 息及与所述一个或多个检测信息相对应的动态门限参数集。
在本发明一优选实施方式中， 所述接收单元， 还配置为接收包括一个 或多个参数的集合， 所述包括一个或多个参数的集合作为所述动态门限参 数集； 所述接收终端还包括： 第一确定单元， 配置为使用所述动态门限参 数集确定动态检测门限的取值。
在本发明一优选实施方式中， 所述处理单元， 还配置为所述检测信息 为接收帧的 BSS识别信息时， 识别到所述接收帧的 BSS识别信息指示是邻 区 BSS的帧， 则确定使用所述动态门限参数集作为动态信道检测门限来进 行所述信道检测。 在本发明一优选实施方式中， 所述处理单元， 还配置为所述检测信息 为接收帧的 BSS识别信息、邻区 BSS接收信号强度、本 BSS接收信号强度 时， 识别到所述接收帧的 BSS识别信息指示是邻区 BSS 的帧， 则以邻区 BSS接收信号强度或本 BSS接收信号强度作为参考值， 或者， 以邻区 BSS 接收信号强度与本 BSS接收信号强度的进行指定运算的结果作为参考值； 将所述参考值与阈值进行比对得到比对结果， 根据所述比对结果确定使用 所述动态门限参数集作为动态信道检测门限来进行所述信道检测。
在本发明一优选实施方式中， 所述处理单元， 还配置为所述检测信息 为接收帧的 BSS识别信息、 接收帧的上下行指示信息时， 识别到所述接收 帧的 BSS识别信息指示是邻区 BSS的帧， 且所述接收帧的上下行指示信息 指示本帧是上行帧时， 则确定使用所述动态门限参数集作为动态信道检测 门限来进行所述信道检测。
在本发明一优选实施方式中， 所述处理单元， 还配置为所述检测信息 为接收帧的 BSS识别信息、 接收帧的上下行指示信息、 邻区 BSS接收信号 强度、 本 BSS接收信号强度时， 识别到所述接收帧的 BSS识别信息指示是 邻区 BSS的帧， 且所述接收帧的上下行指示信息指示本帧是上行帧， 则以 邻区 BSS接收信号强度或本 BSS接收信号强度作为参考值， 或者， 以邻区 BSS接收信号强度与本 BSS接收信号强度的进行指定运算的结果作为参考 值； 将所述参考值与阈值进行比对得到比对结果， 根据所述比对结果确定 使用所述动态门限参数集作为动态信道检测门限来进行所述信道检测。
本发明提供的一种发送终端， 所述发送终端可以为接入点， 如 AP。 所 述终端包括： 发送单元， 配置为当接入点允许和自己关联的关联站点使用 动态信道检测门限时发送所述关联站点使用的一个或多个检测信息及与所 述一个或多个检测信息相对应的动态门限参数集。
本发明提供了一种系统， 所述系统由上述接收终端及上述发送终端所 组成， 系统组成结构示意图如图 5所示， 其中， 接收终端由收集单元 11和 处理单元 12组成。 收集单元 11配置为当接入点允许和自己关联的关联站 点使用动态信道检测门限时接收检测信息； 处理单元 12配置为根据所述检 测信息判断是否使用动态信道检测门限进行信道检测。 发送终端由发送单 元 21组成， 发送单元 21配置为当接入点允许和自己关联的关联站点使用 动态信道检测门限时发送所述关联站点使用的一个或多个检测信息及与所 述一个或多个检测信息相对应的动态门限参数集。
本发明系统的优选实施方式如上述接收终端及上述发送终端的优选实 施方式的组合所组成， 此处不 #丈赘述。
釆用本发明实施例， 关联站点能够根据接入点广播的检测信息进行检 测信息的收集， 并根据收集到的检测信息的结果判断是否釆用动态信道检 测门限， 以及应当釆用的相对应的动态门限参数集， 提高了信道利用率， 提升了系统吞吐。
以下对本发明具体说明如下：
实施例一：
STA在自己发送的探测请求帧（ Probe Request )帧或关联请求消息中指 示自己是否支持动态信道检测门限的能力信息。 当 AP允许和自己关联的 STA使用动态信道检测门限时， AP在 Beacon,探测响应帧（ Probe Response ) 帧， 或者发给 STA的关联响应消息中通知自己的能力信息， 指示自己支持 动态信道检测门限， 同时， AP广播 STA使用动态检测门限时使用的一个或 多个检测信息， 以及检测信息对应的门限参数集。
例如，检测信息是接收帧的 BSS识别信息、接收帧的上下行指示信息、 邻区 BSS接收信号强度、 本 BSS接收信号强度。 则 AP可以釆用如表 1所 示例的方式进行检测信息及对应的门限参数集的通知， 表 1 提供了检测信 息的参数示例如下： 检测信息 情况 采用的门限参数集 接收帧的 BSS识别信息 邻区 BSS的帧 动态门限参数集 本 BSS的帧 固定门限 接收帧的 BSS 识别信息， 接 本 BSS的上行帧 动态门限参数集 收帧的上下行指示信息
其他 固定门限 接收帧的 BSS 识别信息， 以 邻区 BSS的帧，且邻区 BSS 动态门限参数集 及邻区 BSS接收信号强度、 接收信号强度、 本 BSS接
本 BSS接收信号强度、 或者 收信号强度、或者邻区 BSS
邻区 BSS接收信号强度和本 接收信号强度和本 BSS接
BSS 接收信号强度的特定运 收信号强度的特定运算结
算结果 果大于阁值 其他 固定门限 接收帧的 BSS 识别信息， 接 邻区 BSS 的上行帧， 且邻 动态门限参数集 收帧的上下行指示信息、邻区 区 BSS接收信号强度、 本
BSS 接收信号强度、 本 BSS BSS接收信号强度、或者邻
接收信号强度、或者邻区 BSS 区 BSS接收信号强度和本
接收信号强度和本 BSS接收 BSS 接收信号强度的特定
信号强度的特定运算结果 运算结果大于阁值 其他 固定门限
表 1
支持动态信道检测门限的关联站点收到 AP的能力信息， 得知 AP支持 动态信道检测门限，关联站点根据 AP广播的检测信息参数进行检测信息的 收集， 并根据检测信息的结果， 判断是否釆用动态门限参数集。 这里的动 态门限参数集中包含一个或多个参数， 使用这些参数能够确定动态检测门 限的取值。 例如， 参数集中包含一个动态检测门限上限值和 /或下限值， 一 个余量值， 还可以包括发射功率范围值， MCS(Modulation and Coding Scheme,调制编码策略)范围值， 釆用这一个或多个参数能够确定当前 STA 要釆用的动态检测门限值， 这一个或多个参数可以根据情况进行调整。 而 固定门限指现有技术中使用的信道检测门限值。
接收帧的 BSS识别信息是指用于区分不同 BSS的信息， 例如， 不同的 BSS的帧釆用不同的前导码序列， 则 STA收到帧后， 通过物理层解析该帧 的前导码序列就可以得知是本 BSS的帧还是其他 BSS的帧。 或者， 不同的 BSS的帧通过物理层的 signal信令域或者 MAC层信令域中携带的指示信息 来区分， STA收到帧后， 通过解析信令域可以获知本帧是本 BSS的帧还是 其他 BSS的帧。
关联站点釆用接收帧的 BSS识别信息作为检测信息时， 当识别到接收 帧的 BSS识别信息指示是邻区 BSS的帧时， 釆用动态门限参数级作为检测 门限， 当识别到接收帧的 BSS识别信息指示是本 BSS的帧时， 则仍旧釆用 固定门限作为检测门限。
实施例二：
本实施例中， 当 AP支持关联站点使用动态信道检测门限时， 关联站点 釆用接收帧的 BSS识别信息，邻区 BSS接收信号强度、本 BSS接收信号强 度、 或者邻区 BSS接收信号强度和本 BSS接收信号强度的特定运算结果作 为检测信息。
邻区 BSS接收信号强度是指 STA收到邻区 BSS的 AP或者 STA发出 的信号的接收信号强度， 例如是 STA收到邻区 AP发送的 Beacon的 RSSI ( eceived Signal Strength Indication )的值， 或者是收到邻区 STA发送信号 的 RSSI的值， 本 BSS接收信号强度是指 STA收到本 BSS的 AP发出的 Beacon的接收信号强度 RSSI的值。 RSSI的测量为一个周期的或持续的过 程。
当 STA收到一个无线帧，通过接收帧的 BSS识别信息识别为邻区 BSS 的帧时， STA可以釆用本 AP的 Beacon的 RSSI作为参考值， 测量一段时 间内的本 AP的 Beacon的 RSSI的均值， 当均值大于设定阈值时，釆用动态 门限参数集， 当均值小于设定阈值， 釆用固定门限。 或者， STA釆用邻区 BSS的 AP的 Beacon的 RSSI均值，或者收到的邻区 STA信号的 RSSI均值 作为参考值， 与上述方式类似， 不再赘述。
另夕卜， STA还可以以邻区 BSS接收信号强度与本 BSS接收信号强度的 进行特定运算的结果作为参考值， 特定运算可以是： 邻区 BSS接收信号强 度均值与本 BSS接收信号强度均值的差值、 邻区 BSS接收信号强度与本 BSS接收号强度均值的比值等等。 当 STA收到一个无线帧， 通过接收帧的 BSS识别信息识别为本 BSS的帧时， 且邻区 BSS接收信号强度与本 BSS 接收信号强度进行特定运算， 当运算结果大于阈值， 釆用动态门限参数集， 当运算结果小于阈值， 釆用固定门限。
实施例三：
本实施例中， 关联站点以接收帧的 BSS识别信息， 和接收帧的上下行 指示信息作为检测信息。
关联站点接收到一个帧， 首先根据帧的 BSS识别信息判断是否是邻区 BSS的帧， 并根据接收帧的上下行指示信息判断本帧是邻区 BSS的上行帧 还是下行帧， 当帧是邻区 BSS的帧， 且是上行帧时， 则釆用动态信道检测 门限。
实施例四：
本实施例中， 关联站点以接收帧的 BSS识别信息， 接收帧的上下行指 示信息， 邻区 BSS接收信号强度、 本 BSS接收信号强度、 或者邻区 BSS 接收信号强度和本 BSS接收信号强度的特定运算结果作为检测信息。
则关联站点收到一个无线帧时， 根据接收帧的 BSS识别信息和上下行 指示信息进行判定， 当判断为邻区 BSS的上行帧时， STA可以釆用本 AP 的 Beacon的 RSSI作为参考值，测量一段时间内的本 AP的 Beacon的 RSSI 的均值， 当均值大于设定阈值时， 釆用动态门限参数集， 当均值小于设定 阈值， 釆用固定门限。 或者， STA釆用邻区 BSS的 AP的 Beacon的 RSSI 均值， 或者收到的邻区 STA信号的 RSSI均值作为参考值， 当均值大于设 定阈值时， 釆用动态门限参数集， 当均值小于设定阈值， 釆用固定门限。 或者， STA还可以以邻区 BSS接收信号强度与本 BSS接收信号强度的进行 特定运算的结果作为参考值， 当运算结果大于阈值， 釆用动态门限参数集， 当运算结果小于阈值， 釆用固定门限。
本发明实施例所述集成的模块如果以软件功能模块的形式实现并作为 独立的产品销售或使用时， 也可以存储在一个计算机可读取存储介质中。 基于这样的理解， 本发明实施例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， 该计算机软件产品存储在一 个存储介质中， 包括若干指令用以使得一台计算机设备（可以是个人计算 机、 服务器、 或者网络设备等）执行本发明各个实施例所述方法的全部或 部分。 而前述的存储介质包括： U盘、 移动硬盘、 只读存储器 （ROM， Read-Only Memory ), 随机存取存 4诸器 ( RAM, Random Access Memory )、 磁碟或者光盘等各种可以存储程序代码的介质。 这样， 本发明实施例不限 制于任何特定的硬件和软件结合。
相应的， 本发明实施例还提供一种计算机存储介质， 其中存储有计算 机程序， 该计算机程序用于执行本发明实施例的信道检测方法。
以上所述， 仅为本发明的较佳实施例而已， 并非用于限定本发明的保 护范围。 工业实用性
本发明的方法是当接入点允许和自己关联的关联站点使用动态信道检 测门限时， 所述关联站点收集检测信息； 所述关联站点根据所述检测信息 判断是否使用动态信道检测门限进行信道检测。 釆用本发明的方法， 关联 站点能根据接入点发送的检测信息判断是否使用动态信道检测门限进行信 道检测， 从而， 解决了如何使用检测门限用于信道检测的问题。

Claims

权利要求书
1、 一种信道检测方法， 所述方法包括：
当接入点允许和自己关联的关联站点使用动态信道检测门限时， 所述 关联站点收集检测信息；
所述关联站点根据所述检测信息判断是否使用动态信道检测门限进行 信道检测。
2、 根据权利要求 1所述的方法， 其中， 所述检测信息包括： 接收帧的 基本服务集 BSS识别信息、 接收帧的上下行指示信息、 邻区 BSS接收信号 强度、 本 BSS接收信号强度中的至少一种信息。
3、 根据权利要求 2所述的方法， 其中， 所述接收帧的 BSS识别信息为 用于区分不同 BSS的信息， 并通过以下方式中的至少一种方式进行区分： 方式一： 通过无线帧的物理层前导码序列来区分；
方式二： 通过无线帧的物理层或媒体接入控制 MAC层的信令区分。
4、 根据权利要求 2所述的方法， 其中， 所述接收帧的上下行指示信息 为用于区分帧的上下行的信息；
所述帧包括上行帧和下行帧， 所述上行帧为所述关联站点发给所述接 入点的帧； 所述下行帧为所述接入点发给所述关联站点的帧；
通过无线帧的物理层或 MAC 层的信令对所述帧的上下行的信息进行 区分。
5、 根据权利要求 2所述的方法， 其中， 所述邻区 BSS接收信号强度为 所述关联站点收到的邻区 BSS接入点的接收信号强度和 /或所述关联站点收 到的和邻区接入点关联的站点的接收信号强度。
6、 根据权利要求 2所述的方法， 其中， 所述本 BSS接收信号强度为所 述关联站点收到本 BSS接入点的接收信号强度。
7、 根据权利要求 1所述的方法， 其中， 所述关联站点接收接入点以广 播方式通知的所述关联站点使用的一个或多个检测信息及与所述一个或多 个检测信息相对应的动态门限参数集。
8、 根据权利要求 7所述的方法， 其中， 所述动态门限参数集包括一个 或多个参数的集合；
所述方法还包括： 所述关联站点能使用所述动态门限参数集确定动态 检测门限的取值。
9、 根据权利要求 1所述的方法， 其中， 所述方法还包括： 所述关联站 点向所述接入点指示自己是否支持动态信道检测门限的能力信息。
10、 根据权利要求 7或 8所述的方法， 其中， 所述关联站点根据所述 检测信息判断是否使用动态信道检测门限进行信道检测， 包括：
所述检测信息为接收帧的 BSS识别信息时， 所述关联站点识别到所述 接收帧的 BSS识别信息指示是邻区 BSS的帧， 则确定使用所述动态门限参 数集作为动态信道检测门限来进行所述信道检测。
11、 根据权利要求 7或 8所述的方法， 其中， 所述关联站点根据所述 检测信息判断是否使用动态信道检测门限进行信道检测， 包括：
所述检测信息为接收帧的 BSS识别信息、 邻区 BSS接收信号强度、 本 BSS接收信号强度时， 所述关联站点识别到所述接收帧的 BSS识别信息指 示是邻区 BSS的帧，则以邻区 BSS接收信号强度或本 BSS接收信号强度作 为参考值， 或者， 以邻区 BSS接收信号强度与本 BSS接收信号强度的进行 指定运算的结果作为参考值；
将所述参考值与阈值进行比对得到比对结果， 根据所述比对结果确定 使用所述动态门限参数集作为动态信道检测门限来进行所述信道检测。
12、 根据权利要求 7或 8所述的方法， 其中， 所述关联站点根据所述 检测信息判断如何使用动态信道检测门限进行信道检测， 包括：
所述检测信息为接收帧的 BSS识别信息、接收帧的上下行指示信息时， 所述关联站点识别到所述接收帧的 BSS识别信息指示是邻区 BSS的帧， 且 所述接收帧的上下行指示信息指示本帧是上行帧时， 则确定使用所述动态 门限参数集作为动态信道检测门限来进行所述信道检测。
13、 根据权利要求 7或 8所述的方法， 其中， 所述关联站点根据所述 检测信息判断如何使用动态信道检测门限进行信道检测， 包括：
所述检测信息为接收帧的 BSS识别信息、 接收帧的上下行指示信息、 邻区 BSS接收信号强度、 本 BSS接收信号强度时， 所述关联站点识别到所 述接收帧的 BSS识别信息指示是邻区 BSS的帧， 且所述接收帧的上下行指 示信息指示本帧是上行帧， 则以邻区 BSS接收信号强度或本 BSS接收信号 强度作为参考值， 或者， 以邻区 BSS接收信号强度与本 BSS接收信号强度 的进行指定运算的结果作为参考值；
将所述参考值与阈值进行比对得到比对结果， 根据所述比对结果确定 使用所述动态门限参数集作为动态信道检测门限来进行所述信道检测。
14、 一种信道检测方法， 所述方法包括：
当接入点允许和自己关联的关联站点使用动态信道检测门限时， 所述 接入点发送所述关联站点使用的一个或多个检测信息及与所述一个或多个 检测信息相对应的动态门限参数集。
15、 一种接收终端， 所述接收终端包括：
收集单元， 配置为当接入点允许和自己关联的关联站点使用动态信道 检测门限时收集检测信息；
处理单元， 配置为根据所述检测信息判断是否使用动态信道检测门限 进行信道检测。
16、 根据权利要求 15所述的接收终端， 其中， 所述处理单元， 还配置 为根据所述检测信息判断是否使用动态信道检测门限进行信道检测时釆用 的检测信息包括： 接收帧的基本服务集 BSS识别信息、 接收帧的上下行指 示信息、邻区 BSS接收信号强度、本 BSS接收信号强度中的至少一种信息。
17、 根据权利要求 16所述的接收终端， 其中， 所述处理单元， 还配置 为根据所述检测信息判断是否使用动态信道检测门限进行信道检测时釆用 的检测信息为所述接收帧的 BSS识别信息， 所述接收帧的 BSS识别信息为 用于区分不同 BSS的信息， 并通过以下方式中的至少一种方式进行区分： 方式一： 通过无线帧的物理层前导码序列来区分；
方式二： 通过无线帧的物理层或媒体接入控制 MAC层的信令区分。
18、 根据权利要求 16所述的接收终端， 其中， 所述处理单元， 还配置 为根据所述检测信息判断是否使用动态信道检测门限进行信道检测时釆用 的检测信息为所述接收帧的上下行指示信息， 所述接收帧的上下行指示信 息为用于区分帧的上下行的信息；
所述帧包括上行帧和下行帧， 所述上行帧为所述关联站点发给所述接 入点的帧； 所述下行帧为所述接入点发给所述关联站点的帧；
通过无线帧的物理层或 MAC 层的信令对所述帧的上下行的信息进行 区分。
19、 根据权利要求 16所述的接收终端， 其中， 所述处理单元， 还配置 为根据所述检测信息判断是否使用动态信道检测门限进行信道检测时釆用 的检测信息为所述邻区 BSS接收信号强度， 所述邻区 BSS接收信号强度为 所述关联站点收到的邻区 BSS接入点的接收信号强度和 /或所述关联站点收 到的和邻区接入点关联的站点的接收信号强度。
20、 根据权利要求 16所述的接收终端， 其中， 所述处理单元， 还配置 为根据所述检测信息判断是否使用动态信道检测门限进行信道检测时釆用 的检测信息为所述本 BSS接收信号强度， 所述本 BSS接收信号强度为所述 关联站点收到本 BSS接入点的接收信号强度。
21、 根据权利要求 16所述的接收终端， 其中， 所述接收终端还包括： 接收单元， 还配置为接收接入点以广播方式通知的所述关联站点使用的一 个或多个检测信息及与所述一个或多个检测信息相对应的动态门限参数
22、 根据权利要求 21所述的接收终端， 其中， 所述接收单元， 还配置 为接收包括一个或多个参数的集合， 所述包括一个或多个参数的集合作为 所述动态门限参数集；
所述接收终端还包括： 第一确定单元， 配置为使用所述动态门限参数 集确定动态检测门限的取值。
23、 根据权利要求 15至 21任一项所述的接收终端， 其中， 所述处理 单元， 还配置为所述检测信息为接收帧的 BSS识别信息时， 识别到所述接 收帧的 BSS识别信息指示是邻区 BSS的帧， 则确定使用所述动态门限参数 集作为动态信道检测门限来进行所述信道检测。
24、 根据权利要求 15至 21任一项所述的接收终端， 其中， 所述处理 单元， 还配置为所述检测信息为接收帧的 BSS识别信息、 邻区 BSS接收信 号强度、 本 BSS接收信号强度时， 识别到所述接收帧的 BSS识别信息指示 是邻区 BSS的帧，则以邻区 BSS接收信号强度或本 BSS接收信号强度作为 参考值， 或者， 以邻区 BSS接收信号强度与本 BSS接收信号强度的进行指 定运算的结果作为参考值； 将所述参考值与阈值进行比对得到比对结果， 根据所述比对结果确定使用所述动态门限参数集作为动态信道检测门限来 进行所述信道检测。
25、 根据权利要求 15至 21任一项所述的接收终端， 其中， 所述处理 单元， 还配置为所述检测信息为接收帧的 BSS识别信息、 接收帧的上下行 指示信息时， 识别到所述接收帧的 BSS识别信息指示是邻区 BSS的帧， 且 所述接收帧的上下行指示信息指示本帧是上行帧时， 则确定使用所述动态 门限参数集作为动态信道检测门限来进行所述信道检测。
26、 根据权利要求 15至 21任一项所述的接收终端， 其中， 所述处理 单元， 还配置为所述检测信息为接收帧的 BSS识别信息、 接收帧的上下行 指示信息、 邻区 BSS接收信号强度、 本 BSS接收信号强度时， 识别到所述 接收帧的 BSS识别信息指示是邻区 BSS的帧， 且所述接收帧的上下行指示 信息指示本帧是上行帧， 则以邻区 BSS接收信号强度或本 BSS接收信号强 度作为参考值， 或者， 以邻区 BSS接收信号强度与本 BSS接收信号强度的 进行指定运算的结果作为参考值； 将所述参考值与阈值进行比对得到比对 结果， 根据所述比对结果确定使用所述动态门限参数集作为动态信道检测 门限来进行所述信道检测。
27、 一种发送终端， 所述发送终端包括：
发送单元， 配置为当接入点允许和自己关联的关联站点使用动态信道 检测门限时， 发送所述关联站点使用的一个或多个检测信息及与所述一个 或多个检测信息相对应的动态门限参数集。
28、 一种系统， 所述系统包括如权利要求 15至 26任一项所述的接收 终端、 及如权利要求 27所述的发送终端。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11219083B2 (en) 2017-12-15 2022-01-04 Google Llc Establishing and terminating wireless links

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3192297A4 (en) * 2014-09-12 2018-04-04 Intel Corporation Dynamic cca scheme with interface control for 802.11 hew standard and system
EP3226641B1 (en) * 2014-11-19 2023-08-09 Atlas Global Technologies LLC Method and apparatus for processing ppdu based on bbs identification information in high efficiency wireless lan
CN105812295B (zh) * 2014-12-30 2020-05-12 中兴通讯股份有限公司 数据传输方法和站点
CN105813220B (zh) * 2014-12-31 2021-04-06 中兴通讯股份有限公司 一种数据传输方法及站点
US10462799B2 (en) 2015-01-30 2019-10-29 Telefonaktiebolaget Lm Ericsson (Publ) First node and a method therein
DE112016002014T5 (de) * 2015-05-01 2018-01-18 Sony Corporation Informationsverarbeitungsvorrichtung, Informationsverarbeitungsverfahren und Programm
CN106470488B (zh) * 2015-08-20 2020-02-21 华为技术有限公司 信道捆绑方法及装置
US20170078887A1 (en) * 2015-09-15 2017-03-16 Qualcomm Incorporated Systems and methods for reuse of wireless communication resources in neighboring communication networks
CN107027133B (zh) * 2016-01-29 2020-04-03 华为技术有限公司 一种处理信息的方法、第一接入点及第一站点
CN105846924B (zh) * 2016-03-22 2018-11-02 深圳森格瑞通信有限公司 一种无线局域网干扰抑制方法及抗干扰的无线局域网设备
WO2017166309A1 (zh) * 2016-04-01 2017-10-05 华为技术有限公司 一种发送信号、接收信号的方法及装置
CN108024353B (zh) 2016-11-03 2021-10-19 中兴通讯股份有限公司 一种无线帧的处理方法及装置
CN108075869B (zh) * 2016-11-18 2021-06-01 华为技术有限公司 唤醒帧生成解码方法以及装置
KR20200062793A (ko) 2018-11-27 2020-06-04 삼성전자주식회사 베어러를 관리하는 전자 장치 및 그 동작 방법
US20200300050A1 (en) * 2019-03-20 2020-09-24 U.S. Well Services, LLC Frac pump automatic rate adjustment and critical plunger speed indication
DE102021110917A1 (de) * 2020-04-30 2021-11-04 Mediatek Singapore Pte. Ltd. Präambel-Punktierungsunterstützung für eine Breitbandübertragung in Funkkommunikationen
US11882598B2 (en) 2020-04-30 2024-01-23 Mediatek Singapore Pte. Ltd. Preamble puncturing support for wide bandwidth transmission in wireless communications
CN113114521B (zh) * 2021-02-24 2022-10-04 浙江大华技术股份有限公司 一种链路质量的判断方法、网络摄像机和可读存储介质
CN113489556B (zh) * 2021-07-08 2023-07-28 维沃移动通信有限公司 信号接收方法、装置、电子设备和存储介质
CN113567910A (zh) * 2021-07-22 2021-10-29 青岛安然物联网科技有限公司 一种无线信标定位系统及其定位方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1767685A (zh) * 2004-10-27 2006-05-03 中兴通讯股份有限公司 Cdma移动通信系统中切换门限的动态调整方法
CN101253784A (zh) * 2005-08-31 2008-08-27 摩托罗拉公司 动态调整cca门限的系统和方法
CN102640551A (zh) * 2009-12-07 2012-08-15 高通股份有限公司 用于利用动态门限的信号检测系统和方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6993296B2 (en) 2003-02-19 2006-01-31 Motorola, Inc. Multimode background scans of different communication systems on similar frequencies
US7522669B2 (en) 2003-02-21 2009-04-21 Atheros Communications, Inc. Method and apparatus for selective disregard of co-channel transmissions on a medium
US7680150B2 (en) 2004-04-13 2010-03-16 Texas Instruments Incorporated Virtual clear channel avoidance (CCA) mechanism for wireless communications
US7623494B2 (en) 2006-05-18 2009-11-24 Intel Corporation Adjustment of a clear channel assessment (CCA) threshold
CN101662796B (zh) 2009-09-08 2012-05-30 杭州华三通信技术有限公司 一种无线局域网络信道扫描的方法和装置
US8666319B2 (en) * 2011-07-15 2014-03-04 Cisco Technology, Inc. Mitigating effects of identified interference with adaptive CCA threshold

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1767685A (zh) * 2004-10-27 2006-05-03 中兴通讯股份有限公司 Cdma移动通信系统中切换门限的动态调整方法
CN101253784A (zh) * 2005-08-31 2008-08-27 摩托罗拉公司 动态调整cca门限的系统和方法
CN102640551A (zh) * 2009-12-07 2012-08-15 高通股份有限公司 用于利用动态门限的信号检测系统和方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3116255A4 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11219083B2 (en) 2017-12-15 2022-01-04 Google Llc Establishing and terminating wireless links
US11690125B2 (en) 2017-12-15 2023-06-27 Google Llc Establishing and terminating wireless links

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