WO2017127989A1 - 控制方法、装置及网络控制器 - Google Patents

控制方法、装置及网络控制器 Download PDF

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Publication number
WO2017127989A1
WO2017127989A1 PCT/CN2016/072025 CN2016072025W WO2017127989A1 WO 2017127989 A1 WO2017127989 A1 WO 2017127989A1 CN 2016072025 W CN2016072025 W CN 2016072025W WO 2017127989 A1 WO2017127989 A1 WO 2017127989A1
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WIPO (PCT)
Prior art keywords
sta
period
monitoring
adjustment
saw
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PCT/CN2016/072025
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English (en)
French (fr)
Inventor
李勇
李德建
刘培
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华为技术有限公司
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Priority to PCT/CN2016/072025 priority Critical patent/WO2017127989A1/zh
Priority to CN201680079966.6A priority patent/CN108605114B/zh
Publication of WO2017127989A1 publication Critical patent/WO2017127989A1/zh
Priority to US16/045,708 priority patent/US10637790B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/32—Flow control; Congestion control by discarding or delaying data units, e.g. packets or frames
    • H04L47/323—Discarding or blocking control packets, e.g. ACK packets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1614—Details of the supervisory signal using bitmaps
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1854—Scheduling and prioritising arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1896—ARQ related signaling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a control method, device, and network controller.
  • Wireless video surveillance technology has been widely used in security monitoring, traffic management, environmental monitoring and smart home.
  • Video Personal Area Network is a wireless network for video surveillance.
  • a basic service set of VPAN (English: Basic Service Set; abbreviation: BSS) usually includes an access point (English: Access Point; abbreviation: AP) and several sites with video surveillance functions (English: Station; abbreviation: STA ).
  • the STA sends the collected video data to the AP, and the AP forwards the video data to the upper layer user.
  • BSS Basic Service Set
  • AP Access Point
  • STA stations with video surveillance functions
  • the STA sends the collected video data to the AP, and the AP forwards the video data to the upper layer user.
  • the VPAN standard and the Institute of Electrical and Electronics Engineers (English: 802.11ah standard) both use wireless video surveillance as a major application scenario.
  • an experience quality (English: Quality of Experience; QoE) evaluation model is established on the AP side, and the AP uses the QoE evaluation model to evaluate the quality of the user experience, and the evaluation results and such as frame loss rate, delay, and jitter.
  • the quality of service (English: Quality of Service; abbreviation: QoS) performance evaluation parameters are sent to the STA. Based on the received information, the STA triggers the corresponding control policy to adjust the video coding rate when the user experience quality drops to a certain threshold, so as to alleviate network congestion and improve user experience quality.
  • embodiments of the present invention provide a control method, device, and network controller.
  • the technical solution is as follows:
  • a control method includes: acquiring a time division scheme of a STA in a next cruise monitoring period, and the next cruise monitoring period includes N adjustment periods and N monitoring determined according to N preset points. Period, N is a positive integer; the control information is configured according to the time division scheme, and the control information is used to control the running state of the STA in each adjustment period of the next cruise monitoring period; and the control information is sent to the STA.
  • the time division scheme of the STA in the next cruise monitoring period is obtained, and the control information is configured according to the time division scheme, and then the control information is sent to the STA.
  • the problem that the control strategy for the STA in the prior art is still insufficient is solved.
  • the corresponding control strategy is adopted when the quality of the user experience has deteriorated, and the control strategy is adopted before the STA enters the next cruise monitoring cycle, thereby realizing more timely and effective control;
  • the targeted control is implemented to implement a targeted control strategy for the time period in which the network is congested, which helps to improve the quality of the user experience.
  • the configuration information is configured according to a time division scheme, including any one of the following possible implementation manners or a combination of multiple possible implementation manners:
  • the STA priority of the configured STA during the adjustment period is smaller than the STA priority of the STA during the monitoring period, so that the STA transmits the data frame generated during the adjustment period at a low priority. In the above manner, it helps to ensure that useful data frames of other high-priority STAs (such as data frames generated by other STAs during the monitoring period) are sent in time, and the delay is low.
  • the frame dropping policy indicated by the STA to the AP during the adjustment period is discardable, so that the STA indicates discardable to the AP when transmitting the data frame generated during the adjustment period, and the AP is selectively set to be discardable. Data frames are discarded.
  • the AP can selectively discard the data frames generated by the STA during the adjustment period, and provide sufficient resources such as buffer space and processing time for other useful data frames.
  • the ACK policy that the STA indicates to the AP during the adjustment period is an ACK-free policy or a block ACK policy, so that the STA indicates to the AP that there is no ACK response or block ACK response when transmitting the data frame generated during the adjustment period, and the AP pair A data frame set to no ACK response does not perform an ACK response or a block ACK response to a data frame set to a block ACK response.
  • the number of ACK responses during the adjustment period is reduced, thereby saving communication resources between the AP and the STA, and reducing network congestion.
  • the code rate/frame rate of the STA during the adjustment period is less than the code rate/frame rate of the STA during the monitoring period, so that the STA performs the monitoring information collected during the adjustment period according to the above code rate/frame rate. coding. In the above manner, it helps to reduce the amount of data transmitted by the STA to the AP during the adjustment period, and alleviate network congestion.
  • the control information includes a site adjustment window (English: STA Adjustment Window; abbreviation: SAW) sequence element, SAW sequence element
  • SAW sequence control field is included, and the SAW sequence control field includes at least one of an STA priority field, a drop frame indication bit field, an ACK policy field, and a code rate/frame rate field.
  • the STA priority field is used to indicate the STA priority of the STA during the adjustment period;
  • the frame loss indication bit field is used to indicate the frame loss policy set by the STA for the data frame generated during the adjustment period;
  • the ACK policy field is used to indicate that the STA is directed to The ACK policy set by the data frame generated during the adjustment period;
  • the code rate/frame rate field is used to indicate the code rate/frame rate of the video coding or audio coding adopted by the STA for the monitoring information collected during the adjustment period.
  • the method further includes: scheduling the channel access period of the dynamic service period (English: Dynamic Service Period: DSP) for the STA in the adjustment period, so that the STA sends the adjustment to the AP by using the DSP.
  • the ratio of the DSP and the service period (English: Service Period: abbreviated: SP) allocated for the STA scheduling during the adjustment period is higher than the ratio of the DSP and the SP allocated for the STA scheduling during the monitoring period.
  • the DSP of the STA in the adjustment period can be occupied by other high-priority STAs (such as STAs in the monitoring period) to reduce the delay of the STAs in the monitoring period to send data frames.
  • the control information includes a SAW sequence element, and the SAW sequence element includes N SAW allocation fields, and each SAW allocation field includes a first or all of the SAW start time offset field and the SAW duration field.
  • the SAW start time offset field in the i-th SAW allocation field is used to indicate the offset time of the start time of the i-th adjustment period with respect to the reference time; the SAW duration field in the i-th SAW allocation field is used for Indicates the duration of the ith adjustment period.
  • the sending the control information to the STA includes: requiring the original transmission time of the SAW sequence element When other SAW sequence elements are sent to other STAs, the SAW sequence element is sent to the STA after delaying the target duration compared to the original transmission time. In the above manner, the phenomenon of overlapping of adjustment periods of multiple STAs in the network is reduced or avoided, thereby reducing network load.
  • the target duration is less than or equal to the preset threshold.
  • the implementation manner, the fifth possible implementation manner of the first aspect, or the sixth possible implementation manner of the first aspect, in the seventh possible implementation manner of the first aspect acquiring time of the STA in the next cruise monitoring period
  • the dividing scheme includes: receiving, from the monitoring center device, the configuration information of the cruise track corresponding to the next cruise monitoring period, the cruise track configuration information includes setting parameters of the N preset points; determining the STA under the setting parameters of the N preset points A time division scheme for a cruise monitoring cycle.
  • the setting parameter of the ith preset point includes the monitoring setting parameter and the monitoring duration of the ith preset point .
  • Determining, according to setting parameters of the N preset points, a time division scheme of the STA in the next cruise monitoring period including: determining the monitoring duration of the i th preset point as the duration of the STA in the i th monitoring period of the next cruise monitoring period
  • determining the adjustment amount of the STA from the i-1th preset point to the ith preset point determining the adjustment amount of the STA from the i-1th preset point to the ith preset point
  • a control device comprising at least one unit for implementing the control method provided by any of the first aspect or the first aspect of the first aspect.
  • a network controller comprising: a processor, a memory, and a transceiver, the memory for storing one or more instructions configured to be executed by the processor, the The control method provided by implementing any of the above first aspect or the first aspect of the first aspect.
  • FIG. 1 is a schematic diagram of an implementation environment according to an embodiment of the present invention.
  • FIG. 2 is a block diagram of a network controller according to an embodiment of the present invention.
  • FIG. 3 is a flowchart of a control method provided by an embodiment of the present invention.
  • FIG. 5 is a block diagram of a control apparatus according to an embodiment of the present invention.
  • FIG. 6 is a block diagram of a control apparatus according to another embodiment of the present invention.
  • a “module” as referred to herein refers to a program or instruction stored in a memory that is capable of implementing certain functions;
  • "unit” as referred to herein refers to a functional structure that is logically divided, the “unit” may It is implemented by pure hardware or by a combination of hardware and software.
  • the monitoring setting parameters of the STA are adjustable.
  • the user can set several preset points (or monitoring points) and set corresponding monitoring setting parameters for each preset point.
  • a cruise monitoring period refers to the time period in which the STA starts from the first preset point and traverses all the preset points and then returns to the first preset point.
  • the monitoring setting parameters usually include: the monitoring angle of the camera of the STA and the lens parameters of the camera.
  • the monitoring angle of the camera includes a horizontal angle and a pitch angle
  • the lens parameters of the camera include but are not limited to optical focal length, digital focal length, aperture, and the like.
  • the cruise track configuration information includes setting parameters of the N preset points, and the setting parameters of each preset point include the foregoing monitoring setting parameters and the monitoring duration.
  • the monitoring duration of the camera at a preset point refers to the time at which the camera stays and monitors at the preset point.
  • STA root According to the setting parameters, starting from the first preset point, after the preset point stays and the monitoring time reaches the monitoring time, the camera is automatically adjusted according to the monitoring setting parameter of the next preset point and the monitoring time of the next preset point is followed. Monitoring, the entire process is called the cruise monitoring process.
  • the inventor has found that during a cruise monitoring cycle, the STA will enter the adjustment period and the monitoring period in sequence.
  • the adjustment period refers to the time interval in which the STA switches from one preset point to the next preset point.
  • the STA adjusts the device according to the monitoring setting parameters, such as adjusting the monitoring angle and/or lens parameters of the camera.
  • the adjustment period can also be called the cruise adjustment phase.
  • the monitoring period refers to the time interval in which the STA stays and monitors at a preset point. During a monitoring period, the STA's monitoring settings parameters will not change.
  • the monitoring period can also be called the real-time monitoring phase.
  • the dynamic bit rate (Variable Bit Rate; abbreviation: VBR) encoding method is used to encode the monitoring information.
  • VBR Variable Bit Rate
  • the technical solution provided by the embodiment of the present invention performs targeted control on the operating state of the STA during the adjustment period, and implements a targeted control strategy for the time period in which the network is congested.
  • the technical solutions provided by the present invention will be described and illustrated by several embodiments.
  • FIG. 1 shows a schematic diagram of an implementation environment involved in an embodiment of the present invention.
  • the implementation environment includes at least one STA 110, a network controller 120, and a monitoring center device 130.
  • the STA 110 is a monitoring terminal device, such as a video monitoring terminal device in the VPAN.
  • the STA 110 is configured to collect the monitoring information in the monitoring area, and compress and encode the collected monitoring information to obtain a data frame.
  • the STA 110 is further configured to send the data frame to the network controller 120 according to the channel access period scheduled by the network controller 120.
  • the video monitoring terminal device is equipped with a camera that can adjust the monitoring setting parameters such as the monitoring angle and the lens parameter, and collects the image information of the monitoring area through the camera, and compresses and encodes the image information to obtain a video data frame, and then The video data frame is transmitted to the network controller 120 in accordance with the channel access period scheduled by the network controller 120.
  • the network controller 120 is a network device for controlling each STA 110.
  • the network controller 120 may be an AP, or may be a personal basic service set (English: Personal Basic Service Set; abbreviation: PBSS) controller (English: PBSS Control Point; abbreviation: PCP), or may be a domain network coordinator (English) :PAN Coordinator).
  • the network controller 120 is configured to send a beacon frame to the STA 110 to notify the STA 110 of the channel access period allocation information, and the network controller 120 is further configured to send the SAW sequence information frame to the STA 110 to control the STA 110 to collect the monitoring information, and the network controller 120 further uses Will The cruise monitoring period of the STA 110 is divided into an adjustment period and a monitoring period.
  • the monitoring center device 130 is a user equipment deployed in the monitoring center.
  • the monitoring center device 130 is configured to transmit STA control information to the network controller 120 and receive data frames encoded by the monitoring information from the network controller 120.
  • the STA 110 establishes a communication connection with the network controller 120 through a wireless network, for example, the wireless network may be a wireless local area network or a wireless personal area network.
  • the network controller 120 establishes a communication connection with the monitoring center device 130 by wire or wirelessly.
  • the network controller 200 can include a processor 210, a memory 220, a transceiver 230, and a bus 240.
  • Memory 220 and transceiver 230 are coupled to processor 210 via bus 240.
  • network controller 220 can be an AP in a VPAN.
  • Processor 210 includes one or more processing cores.
  • the processor 210 executes various functional applications and data processing by running software programs and modules.
  • the processor 210 includes an arithmetic logic component, a register component, and a control component, etc., which may be an independent central processing unit, or may be an embedded processor, such as a microprocessor (English: Micro Processor Unit; abbreviation: MPU), micro Controller (English: Microcontroller Unit; abbreviation: MCU) or digital signal processor (English: Embedded Digital Signal Processor; abbreviation: EDS).
  • MPU Micro Processor Unit
  • MCU Microcontroller Unit
  • EDS Digital Signal Processor
  • the memory 220 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (English: Static Random Access Memory; SRAM), electrically erasable programmable read only Memory (English: Electrically Erasable Programmable Read-Only Memory; EEPROM), Erasable Programmable Read Only Memory (EPROM), Programmable Read Only Memory (English: Programmable Read- Only Memory; abbreviation: PROM), read only memory (English: Read Only Memory; abbreviation: ROM), magnetic memory, flash memory, disk or optical disk.
  • SRAM Static Random Access Memory
  • EEPROM Electrically Erasable Programmable Read-Only Memory
  • EPROM Erasable Programmable Read Only Memory
  • PROM Programmable Read Only Memory
  • ROM Read Only Memory
  • Processor 210 is configured to execute instructions stored in memory 220.
  • the processor 210 implements the following method: acquiring a time division scheme of the STA in the next cruise monitoring period, and the next cruise monitoring period includes N adjustment periods and N monitoring periods determined according to the N preset points.
  • N is a positive integer;
  • the control information is configured according to the time division scheme, and the control information is used to control the running state of the STA in each adjustment period of the next cruise monitoring period; and the control information is sent to the STA.
  • the transceiver 230 is for external communication, which may include multiple types of interfaces.
  • the transceiver 230 is configured to receive cruise track configuration information from the monitoring center device, send control information to the STA, receive data frames from the STA, forward data frames to the monitoring center device, and the like.
  • the memory 220 can store the operating system 222 and the application modules 224 required for at least one function.
  • the operating system 222 can be an operating system such as a real time operating system (English: Real Time eXecutive; abbreviation: RTX), LINUX, UNIX, WINDOWS, or OS X.
  • the application module 224 can include an acquisition module 224a, a configuration module 224b, and a transmission module 224c.
  • the obtaining module 224a is configured to obtain a time division scheme of the STA in the next cruise monitoring period, and the next cruise monitoring period includes N adjustment periods and N monitoring periods determined according to the N preset points, where N is a positive integer.
  • the configuration module 224b is configured to configure control information according to a time division scheme, and the control information is used to control an operation state of the STA in each adjustment period of the next cruise monitoring period.
  • the sending module 224c is configured to send control information to the STA.
  • the network controller 200 may further include an input/output component (not shown).
  • the input/output components include a display for displaying information and an input device such as a mouse or a keyboard for inputting information by the user. Both the display and the input device are connected to the processor 210 via a bus 240.
  • FIG. 3 shows a flowchart of a control method provided by an embodiment of the present invention.
  • the method is applicable to the network controller 120 in the implementation environment shown in FIG.
  • the method can include the following steps.
  • Step 302 Acquire a time division scheme of the STA in the next cruise monitoring period, and the next cruise monitoring period includes N adjustment periods and N monitoring periods determined according to the N preset points, where N is a positive integer.
  • Step 304 Configure control information according to a time division scheme, where the control information is used to control an operation state of the STA in each adjustment period of the next cruise monitoring period.
  • Step 306 sending control information to the STA.
  • the method provided in this embodiment obtains the time division scheme of the STA in the next cruise monitoring period, and configures the control information according to the time division scheme, and then sends the control information to the STA;
  • the control strategy of the STA still has insufficient problems.
  • the corresponding control strategy is adopted when the quality of the user experience has deteriorated compared with the prior art, and the control strategy is adopted before the STA enters the next cruise monitoring cycle.
  • targeted control A targeted control strategy is implemented for the time period in which the network is congested, which helps to improve the quality of the user experience.
  • FIG. 4 shows a flowchart of a control method provided by another embodiment of the present invention.
  • the execution subject of each step is an AP in the VPAN network.
  • the method can include the following steps.
  • Step 401 Acquire a time division scheme of the STA in the next cruise monitoring period.
  • the AP acquires a time division scheme of the STA in the next cruise cycle.
  • the next cruise monitoring period includes N adjustment periods and N monitoring periods determined according to N preset points, and N is a positive integer.
  • the preset point is usually set by the user.
  • the adjustment period and monitoring period are alternately arranged in sequence.
  • the i-th adjustment period refers to a time interval in which the STA adjusts from the i-1th preset point to the i-th preset point, 1 ⁇ i ⁇ N and i is an integer.
  • the STA adjusts the device according to the monitoring setting parameters, such as adjusting the monitoring angle of the camera (such as horizontal angle and/or pitch angle) and/or lens parameters (such as focal length and/or aperture).
  • the i-th monitoring period refers to the time interval in which the STA stays and monitors at the i-th preset point.
  • the STA's monitoring settings parameters will not change. After the STA enters a cruise monitoring cycle, it first enters the first adjustment period, enters the first monitoring period after the end of the first adjustment period, and enters the second adjustment period after the end of the first monitoring period, in the second After the end of the adjustment period, enter the second monitoring period, and so on.
  • the AP receives the cruise track configuration information corresponding to the next cruise monitoring period from the monitoring center device, and the cruise track configuration information includes setting parameters of the N preset points, and the AP determines the STA according to the setting parameters of the N preset points.
  • the time division scheme in the next cruise monitoring cycle is not limited to:
  • the setting parameter of the ith preset point includes a monitoring setting parameter of the ith preset point and a monitoring duration.
  • the AP determines the monitoring duration of the i th preset point as the duration of the STA in the i th monitoring period of the next cruise monitoring period.
  • the AP determines, according to the monitoring setting parameter of the i-1th preset point and the monitoring setting parameter of the ith preset point, the adjustment amount of the STA from the i-1th preset point to the ith preset point, according to The adjustment amount and the adjustment rate are used to calculate the adjustment time, and the calculated adjustment time is determined as the duration of the STA in the ith adjustment period of the next cruise monitoring period.
  • the monitoring setting parameter of the 0th preset point refers to the current monitoring setting parameter of the STA.
  • the AP adjusts according to the monitoring setting parameter. And adjusting the rate calculation adjustment time, and the calculated adjustment time is taken as the duration of the STA in the ith adjustment period of the next cruise monitoring period.
  • the monitoring setting parameter of the i-th preset point is compared with the monitoring setting parameter of the i-1th preset point, when there are multiple monitoring setting parameters changed, the AP respectively adjusts the adjustment amount according to each monitoring setting parameter. And adjust the rate calculation adjustment time, select the maximum value of each adjustment time as the duration of the STA in the ith adjustment period of the next cruise monitoring period.
  • the monitoring angle and the focal length of the lens are changed.
  • the adjustment time corresponding to the monitoring angle is 1 second
  • the adjustment time corresponding to the lens focal length is 1.1 seconds.
  • the duration is 1.1 seconds.
  • the adjustment rate can be set by the user through the monitoring center device, and the AP acquires the adjustment rate set by the user.
  • the AP may calculate the adjustment rate according to the adjustment time and the adjustment amount of the STA history. For example, the STA sends the end timestamp to the AP at the end of the adjustment period. The AP calculates the adjustment time according to the start timestamp and the end timestamp of the adjustment period, and calculates the adjustment rate according to the known adjustment amount and the adjustment time.
  • the time division scheme of the STA in the next cruise monitoring period is determined by the monitoring center device according to the setting parameters of the N preset points.
  • the calculation method is the same as the calculation method used by the AP to determine the time division scheme according to the setting parameters of the N preset points, and details are not described herein again.
  • the monitoring center device sends the time division scheme of the STA in the next cruise monitoring period to the AP; correspondingly, the AP receives the time division scheme of the STA in the next cruise monitoring period from the monitoring center device.
  • the duration of the adjustment period is calculated by the AP or the monitoring center device according to the adjustment amount and the adjustment rate.
  • the duration of the adjustment period may also be set by the user, and the cruise center acquires the cruise.
  • the trajectory configuration information includes the duration of each adjustment period of the STA set by the user in the next cruise monitoring period.
  • Step 402 Configure control information according to a time division scheme.
  • the AP configures control information according to the time division scheme, and the control information is used to control the running state of the STA in each adjustment period of the next cruise monitoring period.
  • This step includes one or more of the following possible implementations:
  • the AP configures that the STA priority of the STA during the adjustment period is smaller than the STA priority of the STA during the monitoring period, so that the STA transmits the data frame generated during the adjustment period at a low priority.
  • the STA priority is used to control the priority of the STA to send data frames to the AP. Because the STA is adjusting The data frame generated during the period is relatively low for the user. The STA transmits the data frame generated during the adjustment period at a low priority, and transmits the data frame generated during the monitoring period at a high priority. Helps ensure that useful data frames of other high-priority STAs (such as data frames generated by other STAs during the monitoring period) are sent in time with low latency. Optionally, for a normal type data frame generated during the adjustment period, the STA transmits at a low priority; and for a high priority data frame obtained during the adjustment period, the STA still follows the priority specified by the protocol (eg, the STA is at The priority during the monitoring period is sent.
  • the protocol eg, the STA is at The priority during the monitoring period is sent.
  • the high priority data frame includes but is not limited to: a data frame including a monitoring target, and a relay data frame from other STAs. In the above manner, it is ensured that the high priority data frame obtained by the STA during the adjustment period is sent in time, and the delay is low.
  • the AP configures that the frame dropping policy indicated by the STA to the AP during the adjustment period is discardable, so that the STA indicates discardable to the AP when transmitting the data frame generated during the adjustment period, and the AP is selectively set to be discardable.
  • the data frame is discarded.
  • the AP can selectively discard the data frames generated by the STA during the adjustment period, and provide sufficient resources such as buffer space and processing time for other useful data frames.
  • the STA indicates to the AP to discard when transmitting the normal type data frame, and the AP selectively discards the normal type data frame that is set to be discardable;
  • the STA indicates to the AP that it is not discardable when transmitting the high priority data frame. In the above manner, it is ensured that the high priority data frame obtained by the STA during the adjustment period can be effectively received by the AP.
  • the AP configures the ACK policy indicated by the STA to the AP during the adjustment period to be an ACK-free policy or a block ACK policy, so that the STA indicates to the AP that there is no ACK response or block ACK response when transmitting the data frame generated during the adjustment period, the AP A ACK response is not performed on a data frame set to a no ACK response or a block ACK response is performed on a data frame set as a block ACK response.
  • the block ACK response means that after receiving a plurality of data frames from the transmitting end, the receiving end feeds back an ACK response to the transmitting end to indicate the receiving condition of the plurality of data frames.
  • the number of ACK responses during the adjustment period is reduced, thereby saving communication resources between the AP and the STA, and reducing network congestion.
  • the STA indicates to the AP that there is no ACK response or block ACK response when transmitting the normal type data frame; and for the high priority data frame obtained during the adjustment period, The STA indicates an immediate ACK response to the AP when transmitting the high priority data frame, so that the STA immediately feeds back an ACK response for the data frame set to the immediate ACK response.
  • the high priority data frame obtained by the STA during the adjustment period can be reliable.
  • the ground is effectively received by the AP.
  • the AP configures the STA's code rate/frame rate during the adjustment period to be smaller than the code rate/frame rate of the STA during the monitoring period, so that the STA collects the monitoring information collected during the adjustment period according to the above rate/frame rate. Encode.
  • the AP configures the STA to have a frame rate during the adjustment period that is smaller than the frame rate of the STA during the monitoring period, so that the STA encodes the monitoring information collected during the adjustment period according to the above frame rate.
  • the STA adopts a fixed bit rate (English: Constant Bit Rate; abbreviation: CBR) coding mode the AP configures the STA to have a code rate during the adjustment period that is smaller than the code rate of the STA during the monitoring period, so that the STA follows the above code rate.
  • the monitoring information collected during the adjustment period is encoded. In the above manner, it helps to reduce the amount of data transmitted by the STA to the AP during the adjustment period, and alleviate network congestion.
  • control information is a SAW sequence information frame as an example.
  • the control information includes SAW sequence elements.
  • the SAW sequence element includes a SAW sequence control field, and the SAW sequence control field includes at least one of an STA priority field, a frame loss indication bit field, an ACK policy field, and a code rate/frame rate field.
  • the STA Priority field is used to indicate the STA priority of the STA during the adjustment period. In general, for one STA, the STA priority of the configuration STA during the adjustment period is less than the STA priority of the STA during the monitoring period.
  • the drop frame indication bit field is used to indicate the frame dropping policy set by the STA for the data frame generated during the adjustment period. For example, when the frame loss indication bit field is set to 1, the frame loss policy set by the STA for the data frame generated during the adjustment period is discardable; when the frame loss indication bit field is set to 0, the STA is indicated for the adjustment period The frame loss policy set by the generated data frame is not discardable.
  • the ACK Policy field is used to indicate the ACK policy set by the STA for the data frame generated during the adjustment period. For example, when the ACK policy field is set to 1, the ACK policy set by the STA for the data frame generated during the adjustment period is an ACK-free (ie, No-Ack) policy; when the ACK policy field is set to 2, the STA is instructed to adjust The ACK policy set by the data frame generated during the period is an immediate ACK (ie, Immediate-ACK) policy; when the ACK policy field is set to 3, the ACK policy set by the STA for the data frame generated during the adjustment period is a block ACK ( That is, the Block-ACK policy; when the ACK policy field is set to 0, the STA is instructed to decide which ACK policy to use when transmitting the data frame generated during the adjustment period to the AP, that is, the STA decides to adopt the ACK-free policy, and immediately Any one of the ACK policy and the block ACK policy.
  • ACK-free ie, No-Ack
  • the Rate/Frame Rate field is used to indicate the bit rate/frame rate of the video coding or audio coding employed by the STA for the monitoring information acquired during the adjustment period.
  • the code rate/frame rate field is used to indicate a multiple of the code rate/frame rate of the video coding or audio coding used by the STA for the monitoring information collected during the adjustment period relative to the monitoring period. For example, when the code rate/frame rate field is set to 0 to 3, respectively, the code rate/frame rate of the video coding or audio coding used by the STA for the monitoring information collected during the adjustment period is unchanged from the monitoring period, and is reduced to 1/2, reduced to 1/4 and reduced to 1/8. When the reduced code rate/frame rate is not an integer, the nearest nearest integer should be taken up.
  • the code rate/frame rate field specifically indicates the frame rate; when the STA adopts the CBR coding mode, the code rate/frame rate field specifically indicates the code rate.
  • the SAW sequence element includes an element ID field, a length field, and a SAW sequence control field.
  • the element ID is used to indicate the ID of the SAW sequence element and is an identifier of the SAW sequence element.
  • the length field is used to indicate the data length of the SAW sequence element.
  • the SAW sequence control field includes: a STA association ID field, an end SAW sequence element ID field, an established SAW sequence element ID field, an STA priority field, a frame loss indication bit field, an ACK policy field, a code rate/frame rate field, and a reservation. Field.
  • the STA Association ID field is used to indicate the association ID of the STA that is set.
  • the association ID of the STA is used to uniquely identify the STA and is an identifier of the STA.
  • the end of the SAW sequence element ID is used to instruct the STA to stop the cruise monitoring period corresponding to the SAW sequence element identified by the element ID.
  • the established SAW sequence element ID is used to indicate that the STA enters the cruise monitoring period corresponding to the SAW sequence element identified by the element ID.
  • the SAW sequence element further includes N SAW allocation fields. Every A SAW allocation field corresponds to an adjustment period.
  • Each SAW allocation field includes the first or all of the SAW Start Time Offset field and the SAW Duration field.
  • the SAW start time offset field in the i-th SAW allocation field is used to indicate the offset time of the start time of the i-th adjustment period with respect to the reference time. In the normal case, the reference time is the time when the STA receives the SAW sequence element sent by the AP.
  • the SAW Duration field in the ith SAW Assignment field is used to indicate the duration of the ith adjustment period.
  • the SAW Sequence Control field also includes a Duration Type field.
  • the Duration Type field is used to indicate the type of the Duration field of the SAW Assignment field in the SAW Sequence Element. For example, when the Duration Type field is set to 0, the Duration field indicating the SAW Assignment field exists; when the Duration Type field is set to 1, the Duration field of the SAW Assignment field does not exist. For example, when the AP cannot determine the duration of each adjustment period of the STA in the next cruise monitoring period, the duration type field is set to 1, and the SAW sequence element sent by the AP does not explicitly indicate that the STA is in the adjustment period. Instead, the STA indicates whether the STA is in an adjustment period according to an indication of the rotation device of the camera or the focus adjustment device.
  • control information is sent to the STA.
  • the AP sends control information to the STA.
  • the control information includes a SAW sequence element.
  • the SAW sequence element may be included in various management frames or control frames transmitted by the AP to the STA, such as a beacon frame, an announcement frame, or a command frame.
  • the STA After receiving the SAW sequence element sent by the AP, the STA immediately ends the cruise monitoring period corresponding to the SAW sequence element ID field of the end of the SAW sequence element, and enters the cruise monitoring corresponding to the established SAW sequence element ID field of the SAW sequence element. Cycles, and sequentially enters each adjustment period and monitoring period according to the SAW allocation field, and controls the running state of the STA in each adjustment period according to the SAW sequence control field.
  • the network load is too heavy in order to avoid multiple STAs being in the adjustment period at the same time.
  • the AP transmits the SAW sequence element to the STA after delaying the target duration compared to the original transmission time.
  • the original transmission time of the SAW sequence element refers to the time when the AP receives the cruise track configuration information corresponding to the STA in the next cruise monitoring period from the monitoring center device, and generates the SAW sequence element accordingly.
  • the delayed target duration may be limited by a preset threshold, and the target duration is less than or equal to a preset threshold.
  • the preset threshold is user-defined, for example, the preset threshold is 1 second.
  • the preset threshold can also be automatically set by the AP.
  • the preset threshold is used to indicate that the AP is relative to the SAW sequence element.
  • the AP may also adjust the offset time and/or duration of the adjustment period of the STA to avoid overlapping of adjustment periods of multiple STAs in the network. Since the general user only pays attention to and sets the duration of each monitoring period of the STA, and does not pay attention to the starting time of each monitoring period and the starting time and duration of each adjustment period of the STA, the AP can be specified in the preset threshold.
  • the SAW sequence element is sent for a short period of time to reduce or avoid overlapping of adjustment periods of multiple STAs in the network, thereby reducing network load.
  • the AP obtains the time division scheme of the STA in the next cruise monitoring period, and may perform the following steps: the AP schedules a channel access period of the type of the DSP for the STA in the adjustment period, so that the STA uses the DSP.
  • the data frame generated during the adjustment period is sent to the AP.
  • the ratio of DSP to SP allocated for STA scheduling during the adjustment period is higher than the ratio of DSP to SP allocated for STA scheduling during the monitoring period.
  • the STA uses a channel access period of the type of DSP to transmit; and for the high priority data frame obtained during the adjustment period, the STA still adopts a type SP.
  • the channel access period is transmitted.
  • the channel access period of the type of the DSP can be occupied by other STAs.
  • the DSP of the STA in the adjustment period can be occupied by other high-priority STAs (such as STAs in the monitoring period) to reduce the monitoring.
  • the delay of the STA that sends the data frame can be occupied by other high-priority STAs (such as STAs in the monitoring period) to reduce the monitoring.
  • the AP may also adaptively reduce the scheduling allocation for the STA in the adjustment period according to the reduction of the code rate/frame rate.
  • the channel access time is configured to allocate more channel access times for the STAs in the monitoring period to reduce the delay of the STAs transmitting data frames in the monitoring period.
  • the control information includes a beacon frame
  • the AP indicates the allocation information of the channel access period to the AP by sending the beacon frame to the STA.
  • the beacon frame includes a first field and/or a second field.
  • the first field is used to indicate the type of channel access period allocated by the AP for the STA in the adjustment period.
  • the second field is used to indicate that the AP allocates channel access times for the STAs in the adjustment period.
  • the method provided in this embodiment obtains the time division scheme of the STA in the next cruise monitoring period, and configures the control information according to the time division scheme, and then sends the control information to the STA;
  • the control strategy of the STA still has insufficient problems.
  • the corresponding control strategy is adopted when the quality of the user experience has deteriorated compared with the prior art, and the control strategy is adopted before the STA enters the next cruise monitoring cycle.
  • targeted control to achieve a targeted control strategy for the time period caused by network congestion, help to improve users Body Quality inspection.
  • the STAs whose STA priority during the adjustment period is smaller than the STA priority of the STA during the monitoring period, it helps to ensure useful data frames of other high priority STAs (such as data generated by other STAs during the monitoring period).
  • the frame is transmitted in time and has a low delay.
  • the frame dropping policy indicated by the STA to the AP during the adjustment period is discardable, so that the AP can selectively discard the data frame generated by the STA during the adjustment period, and the other is
  • the useful data frame provides sufficient buffer space and processing time and the like; by configuring the ACK policy indicated by the STA to the AP during the adjustment period to be an ACKless policy or a block ACK policy, thereby helping to reduce the number of ACK responses during the adjustment period, thereby
  • the communication resources between the AP and the STA are saved, and the network congestion is alleviated.
  • the STA is configured to reduce the bit rate/frame rate of the STA during the adjustment period, which is less than the rate/frame rate of the STA during the monitoring period. The amount of data transmitted to the AP to alleviate network congestion.
  • the SAW sequence element is sent to the STA after the target transmission time is delayed compared to the original transmission time to reduce or avoid the network.
  • the adjustment period of the STAs overlaps, thereby reducing the network load.
  • the DSP of the STA in the adjustment period can be occupied by other high-priority STAs (such as STAs in the monitoring period) to reduce the The delay of the data frame sent by the STA during the monitoring period.
  • the technical solution provided by the present invention is applied to the video surveillance scenario as an example for illustration.
  • the technical solution provided by the present invention is also applicable to other wireless real-time monitoring scenarios.
  • the monitoring information may include any one or more of a combination of video data, high fidelity audio data, and high definition snap pictures.
  • the technical solution provided by the invention indicates the research direction for the problem that the data flow burst is strong and the real-time performance is poor in the field of wireless real-time monitoring in the case of solving dynamic monitoring and monitoring scene change adjustment.
  • FIG. 5 shows a block diagram of a control device provided by an embodiment of the present invention.
  • the control device can be implemented as part or all of the network controller by software, hardware or a combination of both.
  • the control device may include an acquisition unit 510, a configuration unit 520, and a transmission unit 530.
  • the obtaining unit 510 is configured to acquire a time division scheme of the station STA in the next cruise monitoring period,
  • the next cruise monitoring period includes N adjustment periods and N monitoring periods determined according to N preset points, and N is a positive integer.
  • the configuration unit 520 is configured to configure control information according to the time division scheme acquired by the obtaining unit 510, where the control information is used to control an operation state of the STA in each adjustment period of the next cruise monitoring period.
  • the sending unit 530 is configured to send, to the STA, control information configured by the configuration unit 520.
  • the device provided in this embodiment obtains the time division scheme of the STA in the next cruise monitoring period, and configures the control information according to the time division scheme, and then sends the control information to the STA;
  • the control strategy of the STA still has insufficient problems.
  • the corresponding control strategy is adopted when the quality of the user experience has deteriorated compared with the prior art, and the control strategy is adopted before the STA enters the next cruise monitoring cycle.
  • targeted control to achieve a targeted control strategy for the time period caused by network congestion, help to improve users Experience the quality.
  • FIG. 6 shows a block diagram of a control device according to another embodiment of the present invention.
  • the control device can be implemented as part or all of the network controller by software, hardware or a combination of both.
  • the control device may include an acquisition unit 610, a configuration unit 620, and a transmission unit 630.
  • the obtaining unit 610 is configured to obtain a time division scheme of the station STA in the next cruise monitoring period, where the next cruise monitoring period includes N adjustment periods and N monitoring periods determined according to the N preset points, where N is a positive integer.
  • the configuration unit 620 is configured to configure control information according to the time division scheme acquired by the obtaining unit 610, where the control information is used to control an operation state of the STA in each adjustment period of the next cruise monitoring period.
  • the sending unit 630 is configured to send, to the STA, control information configured by the configuration unit 620.
  • the configuration unit 620 is specifically configured to:
  • Configuring the STA to have a STA priority during the adjustment period is less than the STA priority of the STA during the monitoring period, so that the STA transmits the data frame generated during the adjustment period at a low priority;
  • the STA configuring the STA to drop the frame loss policy indicated to the AP during the adjustment period to be discardable, so that the STA indicates discardable to the AP when transmitting the data frame generated during the adjustment period, and the AP is selectively set to be available. Discarded data frames are discarded.
  • the AP does not perform an ACK response on a data frame set to a no ACK response or a block ACK response to a data frame set as a block ACK response;
  • configuring the STA to have a code rate/frame rate during the adjustment period is less than a code rate/frame rate of the STA during the monitoring period, so that the STA collects the monitoring information collected during the adjustment period according to the code rate/frame rate.
  • the control information includes a SAW sequence element, and the SAW sequence element includes a SAW sequence control field, where the SAW sequence control field includes at least one of an STA priority field, a frame loss indication bit field, an ACK policy field, and a code rate/frame rate field. item.
  • the STA Priority field is used to indicate the STA priority of the STA during the adjustment period.
  • the drop frame indication bit field is used to indicate the frame dropping policy set by the STA for the data frame generated during the adjustment period.
  • the ACK Policy field is used to indicate the ACK policy set by the STA for the data frame generated during the adjustment period.
  • the Rate/Frame Rate field is used to indicate the bit rate/frame rate of the video coding or audio coding employed by the STA for the monitoring information acquired during the adjustment period.
  • control device further includes a scheduling unit 640.
  • the scheduling unit 640 is configured to allocate, for the STA in the adjustment period, a channel access period of the type of the DSP, so that the STA sends the data frame generated during the adjustment period to the AP by using the DSP.
  • the ratio of DSP to SP allocated for STA scheduling during the adjustment period is higher than the ratio of DSP to SP allocated for STA scheduling during the monitoring period.
  • control information includes a SAW sequence element, and the SAW sequence element includes N SAW allocation fields, and each SAW allocation field includes a first or all of the SAW start time offset field and the SAW duration field.
  • the SAW start time offset field in the i-th SAW allocation field is used to indicate the offset time of the start time of the i-th adjustment period with respect to the reference time.
  • the SAW Duration field in the ith SAW Assignment field is used to indicate the duration of the ith adjustment period.
  • the sending unit 630 is specifically configured to: when the SAW sequence element needs to send other SAW sequence elements to the other STAs, send the SAW sequence element to the STA after delaying the target time length compared to the original transmission time.
  • the target duration is less than or equal to a preset threshold.
  • the acquiring unit 610 is configured to: receive, from the monitoring center device, configuration information of the cruise track corresponding to the next cruise monitoring period, where the cruise track configuration information includes setting parameters of the N preset points; The setting parameters of the set point determine the time division scheme of the STA in the next cruise monitoring period.
  • the setting parameter of the ith preset point includes a monitoring setting parameter of the ith preset point and a monitoring duration.
  • the device provided in this embodiment obtains the time division scheme of the STA in the next cruise monitoring period, and configures the control information according to the time division scheme, and then sends the control information to the STA;
  • the control strategy of the STA still has insufficient problems.
  • the corresponding control strategy is adopted when the quality of the user experience has deteriorated compared with the prior art, and the control strategy is adopted before the STA enters the next cruise monitoring cycle.
  • targeted control to achieve a targeted control strategy for the time period caused by network congestion, help to improve users Experience the quality.
  • the STAs whose STA priority during the adjustment period is smaller than the STA priority of the STA during the monitoring period, it helps to ensure useful data frames of other high priority STAs (such as data generated by other STAs during the monitoring period).
  • the frame is transmitted in time and has a low delay.
  • the frame dropping policy indicated by the STA to the AP during the adjustment period is discardable, so that the AP can selectively discard the data frame generated by the STA during the adjustment period, and the other is
  • the useful data frame provides sufficient buffer space and processing time and the like; by configuring the ACK policy indicated by the STA to the AP during the adjustment period to be an ACKless policy or a block ACK policy, thereby helping to reduce the number of ACK responses during the adjustment period, thereby
  • the communication resources between the AP and the STA are saved, and the network congestion is alleviated.
  • the STA is configured to reduce the bit rate/frame rate of the STA during the adjustment period, which is less than the rate/frame rate of the STA during the monitoring period. The amount of data transmitted to the AP to alleviate network congestion.
  • the SAW sequence element is sent to the STA after the target transmission time is delayed compared to the original transmission time to reduce or avoid the network.
  • the adjustment period of the STAs overlaps, thereby reducing the network load.
  • the DSP of the STA in the adjustment period can be occupied by other high-priority STAs (such as STAs in the monitoring period) to reduce the The delay of the data frame sent by the STA during the monitoring period.
  • a person skilled in the art may understand that all or part of the steps of implementing the above embodiments may be completed by hardware, or may be instructed by a program to execute related hardware, and the program may be stored in a computer readable storage medium.
  • the storage medium mentioned may be a read only memory, a magnetic disk or an optical disk or the like.

Abstract

本发明实施例提供了一种控制方法、装置及网络控制器，涉及无线通信技术领域，所述方法包括：获取STA在下一个巡航监控周期的时间划分方案，下一个巡航监控周期包括依据N个预置点划分确定的N个调整期和N个监控期；根据时间划分方案配置控制信息，控制信息用于控制STA在下一个巡航监控周期的各个调整期的运行状态；向STA发送控制信息。本发明解决了现有技术中针对STA的控制策略仍然存在不足的问题；一方面，通过在STA进入下一个巡航监控周期之前即采取控制策略，从而实现更为及时有效的控制；另一方面，针对STA在调整期的运行状态，进行有针对性地控制，实现针对造成网络拥塞的时间段采取有针对性的控制策略。

Description

控制方法、装置及网络控制器 技术领域
本发明涉及无线通信技术领域，特别涉及一种控制方法、装置及网络控制器。
背景技术
无线视频监控技术在安全监控、交通管理、环境监测和智能家居等领域得到了广泛应用。
视频个域网(英文：Video Personal Area Network；缩写：VPAN)是一个用于进行视频监控的无线网络。VPAN的一个基本服务集(英文：Basic Service Set；缩写：BSS)通常包括一个接入点(英文：Access Point；缩写：AP)和若干个具有视频监控功能的站点(英文：Station；缩写：STA)。STA将采集的视频数据发送给AP，由AP将视频数据转发给上层用户。VPAN标准与电气和电子工程师协会(英文：Institute of Electrical and Electronics Engineers；缩写：IEEE)802.11ah标准都将无线视频监控作为一个主要的应用场景。在现有技术中，在AP端建立体验质量(英文：Quality of Experience；缩写：QoE)评估模型，AP采用QoE评估模型评估用户体验质量，并将评估结果和诸如丢帧率、时延、抖动等服务质量(英文：Quality of Service；缩写：QoS)性能评价参数发送给STA。STA根据接收到的上述信息，在用户体验质量下降到某一阈值时，触发采取相应控制策略调整视频编码码率，以达到缓解网络拥塞和提高用户体验质量的目的。
然而，在现有技术中，由于是在已经发生用户体验质量下滑的情况下才采取相应控制策略，虽然在之后的一定时间内能够提高用户体验质量，但固然已造成了一段时间内用户体验质量的下滑。并且，在现有技术中，并未针对造成网络拥塞的时间段采取有针对性的控制策略。因此，现有技术中针对STA的控制策略仍然存在不足。
发明内容
为了解决现有技术中存在的问题，本发明实施例提供了一种控制方法、装置及网络控制器。所述技术方案如下：
第一方面，提供了一种控制方法，该方法包括：获取STA在下一个巡航监控周期的时间划分方案，下一个巡航监控周期包括依据N个预置点划分确定的N个调整期和N个监控期，N为正整数；根据时间划分方案配置控制信息，控制信息用于控制STA在下一个巡航监控周期的各个调整期的运行状态；向STA发送控制信息。
通过获取STA在下一个巡航监控周期的时间划分方案，并根据该时间划分方案配置控制信息，而后将控制信息发送给STA；解决了现有技术中针对STA的控制策略仍然存在不足的问题；一方面，相较于现有技术在已经发生用户体验质量下滑的情况下才采取相应控制策略，通过在STA进入下一个巡航监控周期之前即采取控制策略，从而实现更为及时有效的控制；另一方面，针对STA在调整期的运行状态，进行有针对性地控制，实现针对造成网络拥塞的时间段采取有针对性的控制策略，有助于提高用户体验质量。
在第一方面的第一种可能的实施方式中，根据时间划分方案配置控制信息，包括如下任意一种可能的实现方式或多种可能的实现方式的组合：
1、配置STA在处于调整期期间的STA优先级小于STA在处于监控期期间的STA优先级，以使得STA将在调整期期间生成的数据帧按低优先级进行发送。通过上述方式，有助于确保其它高优先级STA的有用数据帧(如其它STA在监控期期间生成的数据帧)及时发送、时延较低。
2、配置STA在处于调整期期间向AP指示的丢帧策略为可丢弃，以使得STA在发送调整期期间生成的数据帧时向AP指示可丢弃，AP选择性地将被设置为可丢弃的数据帧进行丢弃。通过上述方式，使得AP能够选择性地将STA在调整期期间生成的数据帧进行丢弃，为其它有用数据帧提供足够的缓存空间和处理时间等资源。
3、配置STA在处于调整期期间向AP指示的ACK策略为无ACK策略或块ACK策略，以使得STA在发送调整期期间生成的数据帧时向AP指示无ACK响应或块ACK响应，AP对被设置为无ACK响应的数据帧不进行ACK响应或对被设置为块ACK响应的数据帧进行块ACK响应。通过上述方式，有助于减少调整期期间的ACK响应数量，从而节约AP与STA之间的通信资源，减轻网络拥塞。
4、配置STA在处于调整期期间的码率/帧率小于STA在处于监控期期间的码率/帧率，以使得STA按照上述码率/帧率对在调整期期间采集到的监控信息进行编码。通过上述方式，有助于减少调整期期间STA向AP传输的数据量，缓解网络拥塞。
结合第一方面的第一种可能的实施方式，在第一方面的第二种可能的实施方式中，控制信息包括站点调节窗口(英文：STA Adjustment Window；缩写：SAW)序列元素，SAW序列元素包括SAW序列控制字段，SAW序列控制字段包括STA优先级字段、丢帧指示位字段、ACK策略字段和码率/帧率字段中的至少一项。STA优先级字段用于指示STA在处于调整期期间的STA优先级；丢帧指示位字段用于指示STA针对调整期期间生成的数据帧所设置的丢帧策略；ACK策略字段用于指示STA针对调整期期间生成的数据帧所设置的ACK策略；码率/帧率字段用于指示STA针对调整期期间采集的监控信息所采用的视频编码或音频编码的码率/帧率。
结合第一方面、第一方面的第一种可能的实施方式或者第一方面的第二种可能的实施方式，在第一方面的第三种可能的实施方式中，获取站点STA在下一个巡航监控周期的时间划分方案之后，还包括：为处于调整期的STA调度分配类型为动态服务期(英文：Dynamic Service Period：缩写：DSP)的信道接入期，以使得STA利用DSP向AP发送在调整期期间生成的数据帧。其中，在调整期期间为STA调度分配的DSP与服务期(英文：Service Period：缩写：SP)的比例高于在监控期期间为STA调度分配的DSP与SP的比例。通过上述方式，能够使得处于调整期的STA的DSP可被其它高优先级的STA(如处于监控期的STA)占用，以降低处于监控期的STA发送数据帧的时延。
结合第一方面、第一方面的第一种可能的实施方式、第一方面的第二种可能的实施方式或者第一方面的第三种可能的实施方式，在第一方面的第四种可能的实施方式中，控制信息包括SAW序列元素，SAW序列元素包括N个SAW分配字段，每一个SAW分配字段包括SAW起始时间偏移字段和SAW持续时间字段中的第一项或全部两项。第i个SAW分配字段中的SAW起始时间偏移字段用于指示第i个调整期的起始时刻相对于基准时刻的偏移时间；第i个SAW分配字段中的SAW持续时间字段用于指示第i个调整期的持续时间。
结合第一方面的第四种可能的实施方式，在第一方面的第五种可能的实施方式中，向STA发送控制信息，包括：在SAW序列元素的原定发送时刻需要 向其它STA发送其它SAW序列元素时，相较于原定发送时刻延迟目标时长后向STA发送SAW序列元素。通过上述方式，以减少或者避免网络中的多个STA的调整期发生重叠的现象，从而减轻网络负载。
结合第一方面的第五种可能的实施方式，在第一方面的第六种可能的实施方式中，目标时长小于或等于预设门限值。
结合第一方面、第一方面的第一种可能的实施方式、第一方面的第二种可能的实施方式、第一方面的第三种可能的实施方式、第一方面的第四种可能的实施方式、第一方面的第五种可能的实施方式或者第一方面的第六种可能的实施方式，在第一方面的第七种可能的实施方式中，获取STA在下一个巡航监控周期的时间划分方案，包括：从监控中心设备接收下一个巡航监控周期所对应的巡航轨迹配置信息，巡航轨迹配置信息包括N个预置点的设置参数；根据N个预置点的设置参数，确定STA在下一个巡航监控周期的时间划分方案。
结合第一方面的第七种可能的实施方式，在第一方面的第八种可能的实施方式中，第i个预置点的设置参数包括第i个预置点的监控设置参数和监控时长。根据N个预置点的设置参数，确定STA在下一个巡航监控周期的时间划分方案，包括：将第i个预置点的监控时长确定为STA在下一个巡航监控周期的第i个监控期的时长；根据第i-1个预置点的监控设置参数和第i个预置点的监控设置参数，确定STA从第i-1个预置点调整至第i个预置点的调整量；根据调整量和调整速率计算调整时间；将调整时间确定为STA在下一个巡航监控周期的第i个调整期的时长；其中，当i＝1时，第0个预置点的监控设置参数是指STA当前的监控设置参数。
第二方面，提供了一种控制装置，该控制装置包括至少一个单元，该至少一个单元用于实现上述第一方面或者第一方面中任意一种可能的实施方式所提供的控制方法。
第三方面，提供了一种网络控制器，该网络控制器包括：处理器、存储器和收发器，存储器用于存储一个或者一个以上的指令，该指令被配置成由处理器执行，该指令用于实现上述第一方面或者第一方面中任意一种可能的实施方式所提供的控制方法。
附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所 需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本发明实施例所涉及的一种实施环境的示意图；
图2是本发明一个实施例提供的网络控制器的框图；
图3是本发明一个实施例提供的控制方法的流程图；
图4是本发明另一实施例提供的控制方法的流程图；
图5是本发明一个实施例提供的控制装置的框图；
图6是本发明另一实施例提供的控制装置的框图。
具体实施方式
为使本发明的目的、技术方案和优点更加清楚，下面将结合附图对本发明实施方式作进一步地详细描述。
在本文中提及的“模块”是指存储在存储器中的能够实现某些功能的程序或指令；在本文中提及的“单元”是指按照逻辑划分的功能性结构，该“单元”可以由纯硬件实现，或者由软硬件的结合实现。
在本文中使用的，除非上下文清楚地支持例外情况，单数形式“一个”(“a”、“an”、“the”)旨在也包括复数形式。还应当理解的是，在本文中使用的“和/或”是指包括一个或者一个以上相关联地列出的项目的任意和所有可能组合。
在视频监控系统中，STA(如视频监控终端设备)的监控设置参数可调。在一个巡航监控周期内，用户可设置若干个预置点(或称为监控点)，并为每一个预置点设置对应的监控设置参数。一个巡航监控周期是指STA从第一个预置点开始，遍历所有预置点后又返回至第一个预置点的时间周期。以视频监控为例，监控设置参数通常包括：STA的摄像头的监控角度和摄像头的镜头参数。其中，摄像头的监控角度包括水平角度和俯仰角度，摄像头的镜头参数包括但不限于光学焦距、数字焦距、光圈等参数。当摄像头从一个预置点切换至另一个预置点时，其至少一项监控设置参数发生变化。用户针对STA的一个巡航监控周期设置对应的巡航轨迹配置信息，该巡航轨迹配置信息包括N个预置点的设置参数，每一个预置点的设置参数包括上述监控设置参数和监控时长。摄像头在某一预置点的监控时长是指摄像头在该预置点停留并监控的时间。STA根 据设置参数，从第一个预置点开始，在预置点停留并监控的时间达到监控时长之后，自动按照下一个预置点的监控设置参数调整摄像头并按照下一个预置点的监控时长进行监控，整个过程称为巡航监控过程。
发明人发现，在一个巡航监控周期内，STA会按序依次进入调整期和监控期。其中，调整期是指STA从一个预置点切换至下一个预置点的时间区间。在调整期内，STA根据监控设置参数对设备进行调节，如调节摄像头的监控角度和/或镜头参数。调整期也可称为巡航调整阶段。监控期是指STA在一个预置点停留并监控的时间区间。在一个监控期内，STA的监控设置参数不会发生改变。监控期也可称为实时监控阶段。以采用动态比特率(英文：Variable Bit Rate；缩写：VBR)编码方式对监控信息进行编码为例，在调整期内，由于监控信息(如视频画面)会发生动态变化，调整期期间会产生大量突发数据，导致调整期期间产生的数据量较大，进而对网络负载带来冲击。有鉴于此，本发明实施例提供的技术方案，针对STA在调整期的运行状态，进行有针对性地控制，实现针对造成网络拥塞的时间段采取有针对性的控制策略。下面，通过几个实施例对本发明提供的技术方案进行介绍和说明。
请参考图1，其示出了本发明实施例所涉及的一种实施环境的示意图。该实施环境包括：至少一个STA110、网络控制器120和监控中心设备130。
STA110为监控终端设备，如VPAN中的视频监控终端设备。STA110用于采集监控区域内的监控信息，并将采集的监控信息进行压缩编码得到数据帧，STA110还用于按照网络控制器120调度分配的信道接入期，向网络控制器120发送上述数据帧。以视频监控终端设备为例，视频监控终端设备配备有可调节监控角度、镜头参数等监控设置参数的摄像头，通过摄像头采集监控区域的图像信息，对上述图像信息进行压缩编码得到视频数据帧，而后按照网络控制器120调度分配的信道接入期，向网络控制器120发送上述视频数据帧。
网络控制器120为用于控制各个STA110的网络设备。网络控制器120可以是AP，也可以是个人基本服务集(英文：Personal Basic Service Set；缩写：PBSS)控制器(英文：PBSS Control Point；缩写：PCP)，还可以是个域网协调器(英文：PAN Coordinator)。网络控制器120用于向STA110发送信标帧以通知STA110信道接入期的分配信息，网络控制器120还用于向STA110发送SAW序列信息帧以控制STA110采集监控信息，网络控制器120还用于将 STA110的巡航监控周期划分为调整期和监控期。
监控中心设备130为部署于监控中心的用户设备。监控中心设备130用于向网络控制器120发送STA控制信息和从网络控制器120接收由监控信息编码得到的数据帧。
其中，STA110通过无线网络与网络控制器120建立通信连接，例如该无线网络可以是无线局域网或者无线个域网。网络控制器120通过有线或无线方式与监控中心设备130建立通信连接。
请参考图2，其示出了本发明一个实施例提供的网络控制器的框图。该网络控制器200可以包括：处理器210、存储器220、收发器230以及总线240。存储器220和收发器230通过总线240与处理器210相连。例如，网络控制器220可以是VPAN中的AP。
处理器210包括一个或者一个以上处理核心。处理器210通过运行软件程序以及模块，从而执行各种功能应用以及数据处理。处理器210包括运算逻辑部件、寄存器部件以及控制部件等，其可以是独立的中央处理器，或者也可以是嵌入式处理器，比如微处理器(英文：Micro Processor Unit；缩写：MPU)、微控制器(英文：Microcontroller Unit；缩写：MCU)或者数字信号处理器(英文：Embedded Digital Signal Processor；缩写：EDSP)等。
存储器220可以由任何类型的易失性或非易失性存储设备或者它们的组合实现，如静态随机存取存储器(英文：Static Random Access Memory；缩写：SRAM)，电可擦除可编程只读存储器(英文：Electrically Erasable Programmable Read-Only Memory；缩写：EEPROM)，可擦除可编程只读存储器(英文：Erasable Programmable Read Only Memory；缩写：EPROM)，可编程只读存储器(英文：Programmable Read-Only Memory；缩写：PROM)，只读存储器(英文：Read Only Memory；缩写：ROM)，磁存储器，快闪存储器，磁盘或光盘。存储器220可用于存储软件程序以及模块等可执行的指令。
处理器210被配置为执行存储器220中存储的指令。处理器210通过执行该指令来实现下述方法：获取STA在下一个巡航监控周期的时间划分方案，下一个巡航监控周期包括依据N个预置点划分确定的N个调整期和N个监控期，N为正整数；根据时间划分方案配置控制信息，控制信息用于控制STA在下一个巡航监控周期的各个调整期的运行状态；向STA发送控制信息。
收发器230用于对外通信，其可以包括多种类型接口。例如，收发器230用于从监控中心设备接收巡航轨迹配置信息，向STA发送控制信息，从STA接收数据帧，向监控中心设备转发数据帧，等等。
可选地，存储器220可存储操作系统222以及至少一个功能所需的应用程序模块224。操作系统222可以是实时操作系统(英文：Real Time eXecutive；缩写：RTX)、LINUX、UNIX、WINDOWS或OS X之类的操作系统。应用程序模块224可以包括获取模块224a、配置模块224b和发送模块224c。
获取模块224a用于获取STA在下一个巡航监控周期的时间划分方案，下一个巡航监控周期包括依据N个预置点划分确定的N个调整期和N个监控期，N为正整数。配置模块224b用于根据时间划分方案配置控制信息，控制信息用于控制STA在下一个巡航监控周期的各个调整期的运行状态。发送模块224c用于向STA发送控制信息。
可选地，网络控制器200还可以包括输入/输出组件(图中未示出)。输入/输出组件包括有用于显示信息的显示器和用于用户输入信息的诸如鼠标、键盘之类的输入设备。其中，显示器和输入设备都通过总线240与处理器210相连。
请参考图3，其示出了本发明一个实施例提供的控制方法的流程图。该方法可应用于图1所示实施环境中的网络控制器120中。该方法可以包括如下步骤。
步骤302，获取STA在下一个巡航监控周期的时间划分方案，下一个巡航监控周期包括依据N个预置点划分确定的N个调整期和N个监控期，N为正整数。
步骤304，根据时间划分方案配置控制信息，控制信息用于控制STA在下一个巡航监控周期的各个调整期的运行状态。
步骤306，向STA发送控制信息。
综上所述，本实施例提供的方法，通过获取STA在下一个巡航监控周期的时间划分方案，并根据该时间划分方案配置控制信息，而后将控制信息发送给STA；解决了现有技术中针对STA的控制策略仍然存在不足的问题；一方面，相较于现有技术在已经发生用户体验质量下滑的情况下才采取相应控制策略，通过在STA进入下一个巡航监控周期之前即采取控制策略，从而实现更为及时有效的控制；另一方面，针对STA在调整期的运行状态，进行有针对性地控制， 实现针对造成网络拥塞的时间段采取有针对性的控制策略，有助于提高用户体验质量。
请参考图4，其示出了本发明另一实施例提供的控制方法的流程图。在本实施例中，以各步骤的执行主体为VPAN网络中的AP进行举例说明。该方法可以包括如下步骤。
步骤401，获取STA在下一个巡航监控周期的时间划分方案。
AP获取STA在下一个巡航周期的时间划分方案。下一个巡航监控周期包括依据N个预置点划分确定的N个调整期和N个监控期，N为正整数。预置点通常由用户设定。在一个巡航监控周期内，调整期和监控期依序交替排列。第i个调整期是指STA从第i-1个预置点调整至第i个预置点的时间区间，1≤i≤N且i为整数。当i＝1时，第0个预置点是指STA当前所对应的预置点。在调整期内，STA依据监控设置参数对设备进行调节，如调节摄像头的监控角度(如水平角度和/或俯仰角度)和/或镜头参数(如焦距和/或光圈等)。第i个监控期是指STA在第i个预置点停留并监控的时间区间。在一个监控期内，STA的监控设置参数不会发生改变。STA进入一个巡航监控周期之后，首先进入第1个调整期，在第1个调整期结束之后进入第1个监控期，在第1个监控期结束之后进入第2个调整期，在第2个调整期结束之后进入第2个监控期，依次类推。
具体来讲，AP从监控中心设备接收下一个巡航监控周期所对应的巡航轨迹配置信息，巡航轨迹配置信息包括N个预置点的设置参数，AP根据N个预置点的设置参数，确定STA在下一个巡航监控周期的时间划分方案。
在一种可能的实施方式中，第i个预置点的设置参数包括第i个预置点的监控设置参数和监控时长。AP将第i个预置点的监控时长确定为STA在下一个巡航监控周期的第i个监控期的时长。AP根据第i-1个预置点的监控设置参数和第i个预置点的监控设置参数，确定STA从第i-1个预置点调整至第i个预置点的调整量，根据调整量和调整速率计算调整时间，并将计算得到的调整时间确定为STA在下一个巡航监控周期的第i个调整期的时长。其中，当i＝1时，第0个预置点的监控设置参数是指STA当前的监控设置参数。
当第i个预置点的监控设置参数与第i-1个预置点的监控设置参数相比，仅有一项监控设置参数发生改变时，AP根据该项监控设置参数对应的调整量 和调整速率计算调整时间，并将该计算得到的调整时间作为STA在下一个巡航监控周期的第i个调整期的时长。当第i个预置点的监控设置参数与第i-1个预置点的监控设置参数相比，存在多项监控设置参数发生改变时，AP分别根据每一项监控设置参数对应的调整量和调整速率计算调整时间，选取各个调整时间中的最大值作为STA在下一个巡航监控周期的第i个调整期的时长。例如，当AP从一个预置点调整至下一个预置点时，监控角度和镜头焦距均发生改变，监控角度对应的调整时间为1秒，镜头焦距对应的调整时间为1.1秒，则调整期的时长为1.1秒。
此外，调整速率可以由用户通过监控中心设备设定，AP获取由用户设定的调整速率。或者，AP也可根据STA历史的调整时间和调整量计算得到调整速率。例如，STA在调整期结束时，将结束时间戳发送给AP，AP根据该调整期的起始时间戳和结束时间戳计算调整时间，进而根据已知的调整量和调整时间计算得到调整速率。
在另一种可能的实施方式中，STA在下一个巡航监控周期的时间划分方案由监控中心设备根据N个预置点的设置参数确定。计算方式与上述AP根据N个预置点的设置参数确定时间划分方案所采用的计算方式相同，此处不再赘述。之后，监控中心设备将STA在下一个巡航监控周期的时间划分方案发送给AP；相应地，AP从监控中心设备接收STA在下一个巡航监控周期的时间划分方案。
在上述介绍的实施方式中，调整期的时长由AP或者监控中心设备根据调整量和调整速率计算得到，在其它可能的实施方式中，调整期的时长也可由用户设置，监控中心设备获取的巡航轨迹配置信息中包括由用户设置的STA在下一个巡航监控周期的各个调整期的时长。
步骤402，根据时间划分方案配置控制信息。
AP根据时间划分方案配置控制信息，控制信息用于控制STA在下一个巡航监控周期的各个调整期的运行状态。
本步骤包括如下一种或多种可能的实施方式：
1、AP配置STA在处于调整期期间的STA优先级小于STA在处于监控期期间的STA优先级，以使得STA将在调整期期间生成的数据帧按低优先级进行发送。
STA优先级用于控制STA向AP发送数据帧的优先级。由于STA在调整 期期间生成的数据帧对用户来说意义相对较低，STA将在调整期期间生成的数据帧按低优先级进行发送，而将在监控期期间生成的数据帧按高优先级进行发送，有助于确保其它高优先级STA的有用数据帧(如其它STA在监控期期间生成的数据帧)及时发送、时延较低。可选地，对于在调整期期间生成的普通类型数据帧，STA按低优先级进行发送；而对于在调整期期间得到的高优先级数据帧，STA仍然按照协议规定的优先级(如STA处于监控期期间的优先级)进行发送。其中，高优先级数据帧包括但不限于：包含监控目标的数据帧，来自其它STA的中继数据帧。通过上述方式，确保STA在调整期期间得到的高优先级数据帧及时发送、时延较低。
2、AP配置STA在处于调整期期间向AP指示的丢帧策略为可丢弃，以使得STA在发送调整期期间生成的数据帧时向AP指示可丢弃，AP选择性地将被设置为可丢弃的数据帧进行丢弃。
通过上述方式，使得AP能够选择性地将STA在调整期期间生成的数据帧进行丢弃，为其它有用数据帧提供足够的缓存空间和处理时间等资源。可选地，对于在调整期期间生成的普通类型数据帧，STA在发送该普通类型数据帧时向AP指示可丢弃，AP选择性地将被设置为可丢弃的普通类型数据帧进行丢弃；而对于在调整期期间得到的高优先级数据帧，STA在发送该高优先级数据帧时向AP指示不可丢弃。通过上述方式，确保STA在调整期期间得到的高优先级数据帧能够被AP有效接收。
3、AP配置STA在处于调整期期间向AP指示的ACK策略为无ACK策略或块ACK策略，以使得STA在发送调整期期间生成的数据帧时向AP指示无ACK响应或块ACK响应，AP对被设置为无ACK响应的数据帧不进行ACK响应或对被设置为块ACK响应的数据帧进行块ACK响应。
块ACK响应是指接收端在从发送端接收多个数据帧之后，向发送端反馈一个ACK响应，以指示上述多个数据帧的接收情况。通过上述方式，有助于减少调整期期间的ACK响应数量，从而节约AP与STA之间的通信资源，减轻网络拥塞。可选地，对于在调整期期间生成的普通类型数据帧，STA在发送该普通类型数据帧时向AP指示无ACK响应或块ACK响应；而对于在调整期期间得到的高优先级数据帧，STA在发送该高优先级数据帧时向AP指示立即ACK响应，以使得STA对于被设置为立即ACK响应的数据帧立即反馈ACK响应。通过上述方式，确保STA在调整期期间得到的高优先级数据帧能够可靠 地被AP有效接收。
4、AP配置STA在处于调整期期间的码率/帧率小于STA在处于监控期期间的码率/帧率，以使得STA按照上述码率/帧率对在调整期期间采集到的监控信息进行编码。
当STA采用VBR编码方式时，AP配置STA在处于调整期期间的帧率小于STA在处于监控期期间的帧率，以使得STA按照上述帧率对在调整期期间采集到的监控信息进行编码。当STA采用固定比特率(英文：Constant Bit Rate；缩写：CBR)编码方式时，AP配置STA在处于调整期期间的码率小于STA在处于监控期期间的码率，以使得STA按照上述码率对在调整期期间采集到的监控信息进行编码。通过上述方式，有助于减少调整期期间STA向AP传输的数据量，缓解网络拥塞。
在本实施例中，以控制信息为SAW序列信息帧为例。控制信息包括SAW序列元素。SAW序列元素包括SAW序列控制字段，SAW序列控制字段包括STA优先级字段、丢帧指示位字段、ACK策略字段和码率/帧率字段中的至少一项。
STA优先级字段用于指示STA在处于调整期期间的STA优先级。一般地，对于一个STA来说，配置STA在处于调整期期间的STA优先级小于STA在处于监控期期间的STA优先级。
丢帧指示位字段用于指示STA针对调整期期间生成的数据帧所设置的丢帧策略。例如，当丢帧指示位字段设置为1时，指示STA针对调整期期间生成的数据帧所设置的丢帧策略为可丢弃；当丢帧指示位字段设置为0时，指示STA针对调整期期间生成的数据帧所设置的丢帧策略为不可丢弃。
ACK策略字段用于指示STA针对调整期期间生成的数据帧所设置的ACK策略。例如，当ACK策略字段设置为1时，指示STA针对调整期期间生成的数据帧所设置的ACK策略为无ACK(即No-Ack)策略；当ACK策略字段设置为2时，指示STA针对调整期期间生成的数据帧所设置的ACK策略为立即ACK(即Immediate-ACK)策略；当ACK策略字段设置为3时，指示STA针对调整期期间生成的数据帧所设置的ACK策略为块ACK(即Block-ACK)策略；当ACK策略字段设置为0时，指示STA在向AP发送调整期期间生成的数据帧时，自主决定采用何种ACK策略，即由STA自主决定采用无ACK策略、立即ACK策略和块ACK策略中的任意一种ACK策略。
码率/帧率字段用于指示STA针对调整期期间采集的监控信息所采用的视频编码或音频编码的码率/帧率。可选地，码率/帧率字段用于指示STA针对调整期期间采集的监控信息所采用的视频编码或音频编码的码率/帧率相对于监控期所减少的倍数。例如，当码率/帧率字段分别设置为0至3时，指示STA针对调整期期间采集的监控信息所采用的视频编码或音频编码的码率/帧率相对于监控期不变、减少为1/2、减少为1/4和减少为1/8。当减少后的码率/帧率不为整数时，应当向上取值最邻近的整数。另外，当STA采用VBR编码方式时，码率/帧率字段具体指示帧率；当STA采用CBR编码方式时，码率/帧率字段具体指示码率。
结合参考表-1，其示出了一种SAW序列元素的格式。SAW序列元素包括元素ID字段、长度字段和SAW序列控制字段。其中，元素ID用于指示SAW序列元素的ID，为SAW序列元素的标识符。长度字段用于指示SAW序列元素的数据长度。
元素ID 长度 SAW序列控制 SAW分配 SAW分配 … SAW分配
表-1
结合参考表-2，其示出了一种SAW序列控制字段的格式。SAW序列控制字段包括：STA关联ID字段、结束的SAW序列元素ID字段、建立的SAW序列元素ID字段、STA优先级字段、丢帧指示位字段、ACK策略字段、码率/帧率字段和保留字段。
Figure PCTCN2016072025-appb-000001
表-2
其中，STA关联ID字段用于指示被设置的STA的关联ID。STA的关联ID用于唯一标识STA，是STA的标识符。结束的SAW序列元素ID用于指示STA停止该元素ID所标识SAW序列元素所对应的巡航监控周期。建立的SAW序列元素ID用于指示STA进入该元素ID所标识的SAW序列元素所对应的巡航监控周期。
可选地，如上表-1所示，SAW序列元素还包括N个SAW分配字段。每 一个SAW分配字段对应于一个调整期。每一个SAW分配字段包括SAW起始时间偏移字段和SAW持续时间字段中的第一项或全部两项。第i个SAW分配字段中的SAW起始时间偏移字段用于指示第i个调整期的起始时刻相对于基准时刻的偏移时间。在通常情况下，基准时刻即为STA接收到AP发送的SAW序列元素的时刻。第i个SAW分配字段中的SAW持续时间字段用于指示第i个调整期的持续时间。
相应地，如上表-2所示，SAW序列控制字段还包括持续时间类型字段。持续时间类型字段用于指示SAW序列元素中，SAW分配字段的持续时间字段的类型。例如，当持续时间类型字段设置为0时，指示SAW分配字段的持续时间字段存在；当持续时间类型字段设置为1时，SAW分配字段的持续时间字段不存在。例如，当AP无法确定STA在下一个巡航监控周期的各个调整期的持续时间时，则将持续时间类型字段设置为1，此时AP发出的SAW序列元素不显式指示STA处于调整期的时长，而是由STA根据其摄像头的转动装置或者焦距调整装置的指示，来指示STA是否处于调整期。
在步骤403中，向STA发送控制信息。
AP向STA发送控制信息。在本实施例中，控制信息包括SAW序列元素。SAW序列元素可包含在AP向STA发送的各类管理帧或控制帧内，例如信标帧、通告帧或者命令帧。STA接收到AP发送的SAW序列元素之后，立即结束由SAW序列元素的结束的SAW序列元素ID字段所对应的巡航监控周期，进入由SAW序列元素的建立的SAW序列元素ID字段所对应的巡航监控周期，并按照SAW分配字段依次进入各个调整期和监控期，按照SAW序列控制字段控制STA在各个调整期的运行状态。
由于VPAN中可以包括多个STA，为了避免因多个STA同时处于调整期而导致网络负载过重。在SAW序列元素的原定发送时刻需要向其它STA发送其它SAW序列元素时，AP相较于上述原定发送时刻延迟目标时长后向STA发送SAW序列元素。其中，SAW序列元素的原定发送时刻是指AP从监控中心设备接收STA在下一个巡航监控周期所对应的巡航轨迹配置信息之后，并据此生成SAW序列元素的时刻。可选地，所延迟的目标时长可以由预设门限值进行限制，目标时长小于等于预设门限值。在通常情况下，预设门限值由用户自定义设定，例如预设门限值为1秒。当然，在其它可能的实时方式中，该预设门限值也可由AP自动设定。该预设门限值用于表示AP相对于SAW序列元 素的原定发送时刻的最大延迟发送时长。可选地，AP也可对STA的调整期的偏移时间和/或持续时间进行调整，以避免网络中的多个STA的调整期重叠。由于一般用户只关注和设置STA的各个监控期的时长，并不关注各个监控期的起始时刻和STA的各个调整期的起始时刻和持续时间，因此AP可以在预设门限值所规定的调整范围内，适当延迟一段微小时间发送SAW序列元素，以减少或者避免网络中的多个STA的调整期发生重叠的现象，从而减轻网络负载。
需要补充说明的一点是，AP获取STA在下一个巡航监控周期的时间划分方案之后，还可执行如下步骤：AP为处于调整期的STA调度分配类型为DSP的信道接入期，以使得STA利用DSP向AP发送在调整期期间生成的数据帧。其中，在调整期期间为STA调度分配的DSP与SP的比例高于在监控期期间为STA调度分配的DSP与SP的比例。可选的，对于在调整期期间生成的普通类型数据帧，STA采用类型为DSP的信道接入期进行发送；而对于在调整期期间得到的高优先级数据帧，STA仍然采用类型为SP的信道接入期进行发送。由于类型为DSP的信道接入期可被其它STA占用，通过上述方式，能够使得处于调整期的STA的DSP可被其它高优先级的STA(如处于监控期的STA)占用，以降低处于监控期的STA发送数据帧的时延。
可选地，AP在指示STA在处于调整期期间的码率/帧率减小的情况下，还可根据码率/帧率的减小量，适应性地减少为处于调整期的STA调度分配的信道接入时间，以为处于监控期的STA调度分配更多的信道接入时间，以降低处于监控期的STA发送数据帧的时延。
可选地，控制信息包括信标帧，AP通过向STA发送信标帧向AP指示信道接入期的分配信息。信标帧包括第一字段和/或第二字段。第一字段用于指示AP为处于调整期的STA调度分配的信道接入期的类型。第二字段用于指示AP为处于调整期的STA调度分配的信道接入时间。
综上所述，本实施例提供的方法，通过获取STA在下一个巡航监控周期的时间划分方案，并根据该时间划分方案配置控制信息，而后将控制信息发送给STA；解决了现有技术中针对STA的控制策略仍然存在不足的问题；一方面，相较于现有技术在已经发生用户体验质量下滑的情况下才采取相应控制策略，通过在STA进入下一个巡航监控周期之前即采取控制策略，从而实现更为及时有效的控制；另一方面，针对STA在调整期的运行状态，进行有针对性地控制，实现针对造成网络拥塞的时间段采取有针对性的控制策略，有助于提高用户体 验质量。
另外，通过配置STA在处于调整期期间的STA优先级小于STA在处于监控期期间的STA优先级，有助于确保其它高优先级STA的有用数据帧(如其它STA在监控期期间生成的数据帧)及时发送、时延较低；通过配置STA在处于调整期期间向AP指示的丢帧策略为可丢弃，使得AP能够选择性地将STA在调整期期间生成的数据帧进行丢弃，为其它有用数据帧提供足够的缓存空间和处理时间等资源；通过配置STA在处于调整期期间向AP指示的ACK策略为无ACK策略或块ACK策略，有助于减少调整期期间的ACK响应数量，从而节约AP与STA之间的通信资源，减轻网络拥塞；通过配置STA在处于调整期期间的码率/帧率小于STA在处于监控期期间的码率/帧率，有助于减少调整期期间STA向AP传输的数据量，缓解网络拥塞。
另外，通过在SAW序列元素的原定发送时刻需要向其它STA发送其它SAW序列元素时，相较于上述原定发送时刻延迟目标时长后向STA发送SAW序列元素，以减少或者避免网络中的多个STA的调整期发生重叠的现象，从而减轻网络负载。
另外，通过为处于调整期的STA调度分配类型为DSP的信道接入期，能够使得处于调整期的STA的DSP可被其它高优先级的STA(如处于监控期的STA)占用，以降低处于监控期的STA发送数据帧的时延。
此外，在上述实施例中，仅以本发明提供的技术方案应用于视频监控场景为例进行举例说明，本发明提供的技术方案同样适用于其它无线实时监控场景。例如，依据实际监控需求，监控信息可包含视频数据、高保真音频数据以及高清抓拍图片中任意一项或者多项的组合。本发明提供的技术方案，为无线实时监控领域在解决动态监控，以及监控场景变换调整的情况下导致数据流突发性强，实时性较差等问题指明了研究方向。
下述为本发明装置实施例，可以用于执行本发明方法实施例。对于本发明装置实施例中未披露的细节，请参照本发明方法实施例。
请参考图5，其示出了本发明一个实施例提供的控制装置的框图。该控制装置可以通过软件、硬件或者两者的结合实现成为网络控制器的部分或者全部。该控制装置可以包括：获取单元510、配置单元520和发送单元530。
获取单元510，用于获取站点STA在下一个巡航监控周期的时间划分方案， 下一个巡航监控周期包括依据N个预置点划分确定的N个调整期和N个监控期，N为正整数。
配置单元520，用于根据获取单元510获取的时间划分方案配置控制信息，控制信息用于控制STA在下一个巡航监控周期的各个调整期的运行状态。
发送单元530，用于向STA发送配置单元520配置的控制信息。
综上所述，本实施例提供的装置，通过获取STA在下一个巡航监控周期的时间划分方案，并根据该时间划分方案配置控制信息，而后将控制信息发送给STA；解决了现有技术中针对STA的控制策略仍然存在不足的问题；一方面，相较于现有技术在已经发生用户体验质量下滑的情况下才采取相应控制策略，通过在STA进入下一个巡航监控周期之前即采取控制策略，从而实现更为及时有效的控制；另一方面，针对STA在调整期的运行状态，进行有针对性地控制，实现针对造成网络拥塞的时间段采取有针对性的控制策略，有助于提高用户体验质量。
请参考图6，其示出了本发明另一实施例提供的控制装置的框图。该控制装置可以通过软件、硬件或者两者的结合实现成为网络控制器的部分或者全部。该控制装置可以包括：获取单元610、配置单元620和发送单元630。
获取单元610，用于获取站点STA在下一个巡航监控周期的时间划分方案，下一个巡航监控周期包括依据N个预置点划分确定的N个调整期和N个监控期，N为正整数。
配置单元620，用于根据获取单元610获取的时间划分方案配置控制信息，控制信息用于控制STA在下一个巡航监控周期的各个调整期的运行状态。
发送单元630，用于向STA发送配置单元620配置的控制信息。
可选地，配置单元620，具体用于：
配置STA在处于调整期期间的STA优先级小于STA在处于监控期期间的STA优先级，以使得STA将在调整期期间生成的数据帧按低优先级进行发送；
和/或，配置STA在处于调整期期间向AP指示的丢帧策略为可丢弃，以使得STA在发送调整期期间生成的数据帧时向AP指示可丢弃，AP选择性地将被设置为可丢弃的数据帧进行丢弃；
和/或，配置STA在处于调整期期间向AP指示的ACK策略为无ACK策略或块ACK策略，以使得STA在发送调整期期间生成的数据帧时向AP指示 无ACK响应或块ACK响应，AP对被设置为无ACK响应的数据帧不进行ACK响应或对被设置为块ACK响应的数据帧进行块ACK响应；
和/或，配置STA在处于调整期期间的码率/帧率小于STA在处于监控期期间的码率/帧率，以使得STA按照码率/帧率对在调整期期间采集到的监控信息进行编码。
可选地，控制信息包括SAW序列元素，SAW序列元素包括SAW序列控制字段，SAW序列控制字段包括STA优先级字段、丢帧指示位字段、ACK策略字段和码率/帧率字段中的至少一项。STA优先级字段用于指示STA在处于调整期期间的STA优先级。丢帧指示位字段用于指示STA针对调整期期间生成的数据帧所设置的丢帧策略。ACK策略字段用于指示STA针对调整期期间生成的数据帧所设置的ACK策略。码率/帧率字段用于指示STA针对调整期期间采集的监控信息所采用的视频编码或音频编码的码率/帧率。
可选地，该控制装置还包括调度单元640。调度单元640，用于为处于调整期的STA调度分配类型为DSP的信道接入期，以使得STA利用DSP向AP发送在调整期期间生成的数据帧。其中，在调整期期间为STA调度分配的DSP与SP的比例高于在监控期期间为STA调度分配的DSP与SP的比例。
可选地，控制信息包括SAW序列元素，SAW序列元素包括N个SAW分配字段，每一个SAW分配字段包括SAW起始时间偏移字段和SAW持续时间字段中的第一项或全部两项。第i个SAW分配字段中的SAW起始时间偏移字段用于指示第i个调整期的起始时刻相对于基准时刻的偏移时间。第i个SAW分配字段中的SAW持续时间字段用于指示第i个调整期的持续时间。
可选地，发送单元630，具体用于：在SAW序列元素的原定发送时刻需要向其它STA发送其它SAW序列元素时，相较于原定发送时刻延迟目标时长后向STA发送SAW序列元素。可选地，目标时长小于或等于预设门限值。
可选地，获取单元610，具体用于：从监控中心设备接收下一个巡航监周控期所对应的巡航轨迹配置信息，巡航轨迹配置信息包括N个预置点的设置参数；根据N个预置点的设置参数，确定STA在下一个巡航监控周期的时间划分方案。
可选地，第i个预置点的设置参数包括第i个预置点的监控设置参数和监控时长。相应地，获取单元610，具体用于：将第i个预置点的监控时长确定为STA在下一个巡航监控周期的第i个监控期的时长；根据第i-1个预置点的 监控设置参数和第i个预置点的监控设置参数，确定STA从第i-1个预置点调整至第i个预置点的调整量；根据调整量和调整速率计算调整时间；将调整时间确定为STA在下一个巡航监控周期的第i个调整期的时长；其中，当i＝1时，第0个预置点的监控设置参数是指STA当前的监控设置参数。
综上所述，本实施例提供的装置，通过获取STA在下一个巡航监控周期的时间划分方案，并根据该时间划分方案配置控制信息，而后将控制信息发送给STA；解决了现有技术中针对STA的控制策略仍然存在不足的问题；一方面，相较于现有技术在已经发生用户体验质量下滑的情况下才采取相应控制策略，通过在STA进入下一个巡航监控周期之前即采取控制策略，从而实现更为及时有效的控制；另一方面，针对STA在调整期的运行状态，进行有针对性地控制，实现针对造成网络拥塞的时间段采取有针对性的控制策略，有助于提高用户体验质量。
另外，通过配置STA在处于调整期期间的STA优先级小于STA在处于监控期期间的STA优先级，有助于确保其它高优先级STA的有用数据帧(如其它STA在监控期期间生成的数据帧)及时发送、时延较低；通过配置STA在处于调整期期间向AP指示的丢帧策略为可丢弃，使得AP能够选择性地将STA在调整期期间生成的数据帧进行丢弃，为其它有用数据帧提供足够的缓存空间和处理时间等资源；通过配置STA在处于调整期期间向AP指示的ACK策略为无ACK策略或块ACK策略，有助于减少调整期期间的ACK响应数量，从而节约AP与STA之间的通信资源，减轻网络拥塞；通过配置STA在处于调整期期间的码率/帧率小于STA在处于监控期期间的码率/帧率，有助于减少调整期期间STA向AP传输的数据量，缓解网络拥塞。
另外，通过在SAW序列元素的原定发送时刻需要向其它STA发送其它SAW序列元素时，相较于上述原定发送时刻延迟目标时长后向STA发送SAW序列元素，以减少或者避免网络中的多个STA的调整期发生重叠的现象，从而减轻网络负载。
另外，通过为处于调整期的STA调度分配类型为DSP的信道接入期，能够使得处于调整期的STA的DSP可被其它高优先级的STA(如处于监控期的STA)占用，以降低处于监控期的STA发送数据帧的时延。
需要说明的是：上述实施例提供的装置在实现其功能时，仅以上述各功能 模块的划分进行举例说明，实际应用中，可以根据需要而将上述功能分配由不同的功能模块完成，即将设备的内部结构划分成不同的功能模块，以完成以上描述的全部或者部分功能。另外，上述实施例提供的装置与方法实施例属于同一构思，其具体实现过程详见方法实施例，这里不再赘述。
本领域普通技术人员可以理解实现上述实施例的全部或部分步骤可以通过硬件来完成，也可以通过程序来指令相关的硬件完成，所述的程序可以存储于一种计算机可读存储介质中，上述提到的存储介质可以是只读存储器，磁盘或光盘等。
以上所述仅为本发明的较佳实施例，并不用以限制本发明，凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (27)

  1. 一种控制方法，其特征在于，所述方法包括：
    获取站点STA在下一个巡航监控周期的时间划分方案，所述下一个巡航监控周期包括依据N个预置点划分确定的N个调整期和N个监控期，N为正整数；
    根据所述时间划分方案配置控制信息，所述控制信息用于控制所述STA在所述下一个巡航监控周期的各个所述调整期的运行状态；
    向所述STA发送所述控制信息。
  2. 根据权利要求1所述的方法，其特征在于，所述根据所述时间划分方案配置控制信息，包括：
    配置所述STA在处于所述调整期期间的STA优先级小于所述STA在处于所述监控期期间的STA优先级，以使得所述STA将在所述调整期期间生成的数据帧按低优先级进行发送；
    和/或，配置所述STA在处于所述调整期期间向接入点AP指示的丢帧策略为可丢弃，以使得所述STA在发送所述调整期期间生成的数据帧时向所述AP指示可丢弃，所述AP选择性地将被设置为可丢弃的数据帧进行丢弃；
    和/或，配置所述STA在处于所述调整期期间向AP指示的ACK策略为无ACK策略或块ACK策略，以使得所述STA在发送所述调整期期间生成的数据帧时向所述AP指示无ACK响应或块ACK响应，所述AP对被设置为无ACK响应的数据帧不进行ACK响应或对被设置为块ACK响应的数据帧进行块ACK响应；
    和/或，配置所述STA在处于所述调整期期间的码率/帧率小于所述STA在处于所述监控期期间的码率/帧率，以使得所述STA按照所述码率/帧率对在所述调整期期间采集到的监控信息进行编码。
  3. 根据权利要求2所述的方法，其特征在于，所述控制信息包括站点调节窗口SAW序列元素，所述SAW序列元素包括SAW序列控制字段，所述SAW序列控制字段包括STA优先级字段、丢帧指示位字段、ACK策略字段和码率/帧率字段中的至少一项；
    所述STA优先级字段用于指示所述STA在处于所述调整期期间的STA优 先级；
    所述丢帧指示位字段用于指示所述STA针对所述调整期期间生成的数据帧所设置的丢帧策略；
    所述ACK策略字段用于指示所述STA针对所述调整期期间生成的数据帧所设置的ACK策略；
    所述码率/帧率字段用于指示所述STA针对所述调整期期间采集的监控信息所采用的视频编码或音频编码的码率/帧率。
  4. 根据权利要求1至3任一项所述的方法，其特征在于，所述获取站点STA在下一个巡航监控周期的时间划分方案之后，还包括：
    为处于所述调整期的所述STA调度分配类型为动态服务期DSP的信道接入期，以使得所述STA利用所述DSP向AP发送在所述调整期期间生成的数据帧；
    其中，在所述调整期期间为所述STA调度分配的DSP与SP的比例高于在所述监控期期间为所述STA调度分配的DSP与SP的比例。
  5. 根据权利要求1至4任一项所述的方法，其特征在于，所述控制信息包括站点调节窗口SAW序列元素，所述SAW序列元素包括N个SAW分配字段，每一个SAW分配字段包括SAW起始时间偏移字段和SAW持续时间字段中的第一项或全部两项；
    第i个SAW分配字段中的所述SAW起始时间偏移字段用于指示第i个调整期的起始时刻相对于基准时刻的偏移时间；
    第i个SAW分配字段中的所述SAW持续时间字段用于指示第i个调整期的持续时间。
  6. 根据权利要求5所述的方法，其特征在于，所述向所述STA发送所述控制信息，包括：
    在所述SAW序列元素的原定发送时刻需要向其它STA发送其它SAW序列元素时，相较于所述原定发送时刻延迟目标时长后向所述STA发送所述SAW序列元素。
  7. 根据权利要求6所述的方法，其特征在于，所述目标时长小于或等于预 设门限值。
  8. 根据权利要求1至7任一项所述的方法，其特征在于，所述获取STA在下一个巡航监控周期的时间划分方案，包括：
    从监控中心设备接收所述下一个巡航监控周期所对应的巡航轨迹配置信息，所述巡航轨迹配置信息包括所述N个预置点的设置参数；
    根据所述N个预置点的设置参数，确定所述STA在下一个巡航监控周期的时间划分方案。
  9. 根据权利要求8所述的方法，其特征在于，第i个预置点的设置参数包括所述第i个预置点的监控设置参数和监控时长；
    所述根据所述N个预置点的设置参数，确定所述STA在下一个巡航监控周期的时间划分方案，包括：
    将所述第i个预置点的监控时长确定为所述STA在下一个巡航监控周期的第i个监控期的时长；
    根据所述第i-1个预置点的监控设置参数和第i个预置点的监控设置参数，确定所述STA从所述第i-1个预置点调整至所述第i个预置点的调整量；根据所述调整量和调整速率计算调整时间；将所述调整时间确定为所述STA在下一个巡航监控周期的第i个调整期的时长；
    其中，当i＝1时，第0个预置点的监控设置参数是指所述STA当前的监控设置参数。
  10. 一种控制装置，其特征在于，所述装置包括：
    获取单元，用于获取站点STA在下一个巡航监控周期的时间划分方案，所述下一个巡航监控周期包括依据N个预置点划分确定的N个调整期和N个监控期，N为正整数；
    配置单元，用于根据所述时间划分方案配置控制信息，所述控制信息用于控制所述STA在所述下一个巡航监控周期的各个所述调整期的运行状态；
    发送单元，用于向所述STA发送所述控制信息。
  11. 根据权利要求10所述的装置，其特征在于，所述配置单元，具体用于：
    配置所述STA在处于所述调整期期间的STA优先级小于所述STA在处于所述监控期期间的STA优先级，以使得所述STA将在所述调整期期间生成的数据帧按低优先级进行发送；
    和/或，配置所述STA在处于所述调整期期间向接入点AP指示的丢帧策略为可丢弃，以使得所述STA在发送所述调整期期间生成的数据帧时向所述AP指示可丢弃，所述AP选择性地将被设置为可丢弃的数据帧进行丢弃；
    和/或，配置所述STA在处于所述调整期期间向AP指示的ACK策略为无ACK策略或块ACK策略，以使得所述STA在发送所述调整期期间生成的数据帧时向所述AP指示无ACK响应或块ACK响应，所述AP对被设置为无ACK响应的数据帧不进行ACK响应或对被设置为块ACK响应的数据帧进行块ACK响应；
    和/或，配置所述STA在处于所述调整期期间的码率/帧率小于所述STA在处于所述监控期期间的码率/帧率，以使得所述STA按照所述码率/帧率对在所述调整期期间采集到的监控信息进行编码。
  12. 根据权利要求11所述的装置，其特征在于，所述控制信息包括站点调节窗口SAW序列元素，所述SAW序列元素包括SAW序列控制字段，所述SAW序列控制字段包括STA优先级字段、丢帧指示位字段、ACK策略字段和码率/帧率字段中的至少一项；
    所述STA优先级字段用于指示所述STA在处于所述调整期期间的STA优先级；
    所述丢帧指示位字段用于指示所述STA针对所述调整期期间生成的数据帧所设置的丢帧策略；
    所述ACK策略字段用于指示所述STA针对所述调整期期间生成的数据帧所设置的ACK策略；
    所述码率/帧率字段用于指示所述STA针对所述调整期期间采集的监控信息所采用的视频编码或音频编码的码率/帧率。
  13. 根据权利要求10至12任一项所述的装置，其特征在于，所述装置，还包括：
    调度单元，用于为处于所述调整期的所述STA调度分配类型为动态服务期 DSP的信道接入期，以使得所述STA利用所述DSP向AP发送在所述调整期期间生成的数据帧；
    其中，在所述调整期期间为所述STA调度分配的DSP与SP的比例高于在所述监控期期间为所述STA调度分配的DSP与SP的比例。
  14. 根据权利要求10至13任一项所述的装置，其特征在于，所述控制信息包括站点调节窗口SAW序列元素，所述SAW序列元素包括N个SAW分配字段，每一个SAW分配字段包括SAW起始时间偏移字段和SAW持续时间字段中的第一项或全部两项；
    第i个SAW分配字段中的所述SAW起始时间偏移字段用于指示第i个调整期的起始时刻相对于基准时刻的偏移时间；
    第i个SAW分配字段中的所述SAW持续时间字段用于指示第i个调整期的持续时间。
  15. 根据权利要求14所述的装置，其特征在于，所述发送单元，具体用于：
    在所述SAW序列元素的原定发送时刻需要向其它STA发送其它SAW序列元素时，相较于所述原定发送时刻延迟目标时长后向所述STA发送所述SAW序列元素。
  16. 根据权利要求15所述的装置，其特征在于，所述目标时长小于或等于预设门限值。
  17. 根据权利要求10至16任一项所述的装置，其特征在于，所述获取单元，具体用于：
    从监控中心设备接收所述下一个巡航监控周期所对应的巡航轨迹配置信息，所述巡航轨迹配置信息包括所述N个预置点的设置参数；
    根据所述N个预置点的设置参数，确定所述STA在下一个巡航监控周期的时间划分方案。
  18. 根据权利要求17所述的装置，其特征在于，第i个预置点的设置参数包括所述第i个预置点的监控设置参数和监控时长；
    所述获取单元，具体用于：
    将所述第i个预置点的监控时长确定为所述STA在下一个巡航监控周期的第i个监控期的时长；
    根据所述第i-1个预置点的监控设置参数和第i个预置点的监控设置参数，确定所述STA从所述第i-1个预置点调整至所述第i个预置点的调整量；根据所述调整量和调整速率计算调整时间；将所述调整时间确定为所述STA在下一个巡航监控周期的第i个调整期的时长；
    其中，当i＝1时，第0个预置点的监控设置参数是指所述STA当前的监控设置参数。
  19. 一种网络控制器，其特征在于，所述网络控制器包括：处理器、存储器和收发器，所述存储器用于存储一个或者一个以上的指令，所述指令被配置成由所述处理器执行；
    所述处理器，用于获取站点STA在下一个巡航监控周期的时间划分方案，所述下一个巡航监控周期包括依据N个预置点划分确定的N个调整期和N个监控期，N为正整数；
    所述处理器，还用于根据所述时间划分方案配置控制信息，所述控制信息用于控制所述STA在所述下一个巡航监控周期的各个所述调整期的运行状态；
    所述处理器，还用于控制所述收发器向所述STA发送所述控制信息。
  20. 根据权利要求19所述的网络控制器，其特征在于，所述处理器，具体用于：
    配置所述STA在处于所述调整期期间的STA优先级小于所述STA在处于所述监控期期间的STA优先级，以使得所述STA将在所述调整期期间生成的数据帧按低优先级进行发送；
    和/或，配置所述STA在处于所述调整期期间向接入点AP指示的丢帧策略为可丢弃，以使得所述STA在发送所述调整期期间生成的数据帧时向所述AP指示可丢弃，所述AP选择性地将被设置为可丢弃的数据帧进行丢弃；
    和/或，配置所述STA在处于所述调整期期间向AP指示的ACK策略为无ACK策略或块ACK策略，以使得所述STA在发送所述调整期期间生成的数据帧时向所述AP指示无ACK响应或块ACK响应，所述AP对被设置为无ACK 响应的数据帧不进行ACK响应或对被设置为块ACK响应的数据帧进行块ACK响应；
    和/或，配置所述STA在处于所述调整期期间的码率/帧率小于所述STA在处于所述监控期期间的码率/帧率，以使得所述STA按照所述码率/帧率对在所述调整期期间采集到的监控信息进行编码。
  21. 根据权利要求20所述的网络控制器，其特征在于，所述控制信息包括站点调节窗口SAW序列元素，所述SAW序列元素包括SAW序列控制字段，所述SAW序列控制字段包括STA优先级字段、丢帧指示位字段、ACK策略字段和码率/帧率字段中的至少一项；
    所述STA优先级字段用于指示所述STA在处于所述调整期期间的STA优先级；
    所述丢帧指示位字段用于指示所述STA针对所述调整期期间生成的数据帧所设置的丢帧策略；
    所述ACK策略字段用于指示所述STA针对所述调整期期间生成的数据帧所设置的ACK策略；
    所述码率/帧率字段用于指示所述STA针对所述调整期期间采集的监控信息所采用的视频编码或音频编码的码率/帧率。
  22. 根据权利要求19至21任一项所述的网络控制器，其特征在于，所述处理器，还用于：
    为处于所述调整期的所述STA调度分配类型为动态服务期DSP的信道接入期，以使得所述STA利用所述DSP向AP发送在所述调整期期间生成的数据帧；
    其中，在所述调整期期间为所述STA调度分配的DSP与SP的比例高于在所述监控期期间为所述STA调度分配的DSP与SP的比例。
  23. 根据权利要求19至22任一项所述的网络控制器，其特征在于，所述控制信息包括站点调节窗口SAW序列元素，所述SAW序列元素包括N个SAW分配字段，每一个SAW分配字段包括SAW起始时间偏移字段和SAW持续时间字段中的第一项或全部两项；
    第i个SAW分配字段中的所述SAW起始时间偏移字段用于指示第i个调整 期的起始时刻相对于基准时刻的偏移时间；
    第i个SAW分配字段中的所述SAW持续时间字段用于指示第i个调整期的持续时间。
  24. 根据权利要求23所述的网络控制器，其特征在于，所述处理器，具体用于：
    在所述SAW序列元素的原定发送时刻需要向其它STA发送其它SAW序列元素时，相较于所述原定发送时刻延迟目标时长后向所述STA发送所述SAW序列元素。
  25. 根据权利要求24所述的网络控制器，其特征在于，所述目标时长小于或等于预设门限值。
  26. 根据权利要求19至25任一项所述的网络控制器，其特征在于，所述处理器，具体用于：
    从监控中心设备接收所述下一个巡航监控周期所对应的巡航轨迹配置信息，所述巡航轨迹配置信息包括所述N个预置点的设置参数；
    根据所述N个预置点的设置参数，确定所述STA在下一个巡航监控周期的时间划分方案。
  27. 根据权利要求26所述的网络控制器，其特征在于，第i个预置点的设置参数包括所述第i个预置点的监控设置参数和监控时长；
    所述处理器，具体用于：
    将所述第i个预置点的监控时长确定为所述STA在下一个巡航监控周期的第i个监控期的时长；
    根据所述第i-1个预置点的监控设置参数和第i个预置点的监控设置参数，确定所述STA从所述第i-1个预置点调整至所述第i个预置点的调整量；根据所述调整量和调整速率计算调整时间；将所述调整时间确定为所述STA在下一个巡航监控周期的第i个调整期的时长；
    其中，当i＝1时，第0个预置点的监控设置参数是指所述STA当前的监控设置参数。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116074937A (zh) * 2023-04-06 2023-05-05 安徽深迪科技有限公司 基于5g网络技术的智能现场管理方法及管理平台

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210289548A1 (en) * 2018-05-09 2021-09-16 Convida Wireless, Llc Channel access with a new radio unlicensed serving cell
CN112650190A (zh) * 2019-10-13 2021-04-13 九江精密测试技术研究所 一种快速实现rtx控制系统与嵌入式控制系统的转换装置
CN111683229B (zh) * 2020-06-22 2021-10-26 杭州海康威视系统技术有限公司 巡航监控方法、装置、设备及存储介质

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101350915A (zh) * 2008-09-01 2009-01-21 北京中星微电子有限公司 一种自适应调整工作参数的方法及监控前端设备
CN102572357A (zh) * 2011-12-31 2012-07-11 中兴通讯股份有限公司 一种视频监控前端的存储方法及视频监控系统
WO2014183540A1 (zh) * 2013-11-26 2014-11-20 中兴通讯股份有限公司 一种视频监控的内容适配方法、系统及中心服务器、装置
CN104519325A (zh) * 2014-12-29 2015-04-15 重庆邮电大学 一种基于4g网络的无线视频监控系统自适应保障方法

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8325686B2 (en) * 2006-04-20 2012-12-04 Samsung Electronics Co., Ltd. Method and system for channel time allocation and access control in wireless network for high-definition video transmission
US8627396B2 (en) * 2009-06-12 2014-01-07 Cygnus Broadband, Inc. Systems and methods for prioritization of data for intelligent discard in a communication network
US20130326551A1 (en) * 2012-05-30 2013-12-05 Debdeep CHATTERJEE Wireless multimedia quality of experience reporting
CN103702067B (zh) 2012-09-28 2017-09-29 中国电信股份有限公司 无线视频监控终端自动巡航方法、系统及平台
CN105210377A (zh) * 2013-05-07 2015-12-30 Vid拓展公司 针对视频应用的QOE意识WiFi增强
US9730105B2 (en) * 2013-05-20 2017-08-08 Qualcomm Incorporated Listen-before-talk reservation scheme for wireless communications over unlicensed spectrum
US9414250B2 (en) * 2013-10-08 2016-08-09 Tektronix Texas, Llc Determining quality of experience confidence level for mobile subscribers
CN103888846B (zh) 2014-03-04 2017-02-08 浙江大学 基于QoE的无线视频流业务自适应速率控制方法
US10051581B2 (en) * 2014-03-14 2018-08-14 Interdigital Patent Holdings, Inc. Wifi efficient network transition
CN103986914B (zh) 2014-05-27 2017-02-01 东南大学 无线视频监控系统中基于客户端数量的码率自适应方法
CN104320627B (zh) * 2014-11-10 2017-12-12 武汉市中心医院 一种医院病房视频监视的方法以及相关应用服务系统
CN104902575B (zh) * 2015-05-21 2018-06-15 重庆邮电大学 一种多媒体传感网实时调度方法
CN105049298A (zh) * 2015-08-27 2015-11-11 浪潮集团有限公司 一种云资源监控方法和系统

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101350915A (zh) * 2008-09-01 2009-01-21 北京中星微电子有限公司 一种自适应调整工作参数的方法及监控前端设备
CN102572357A (zh) * 2011-12-31 2012-07-11 中兴通讯股份有限公司 一种视频监控前端的存储方法及视频监控系统
WO2014183540A1 (zh) * 2013-11-26 2014-11-20 中兴通讯股份有限公司 一种视频监控的内容适配方法、系统及中心服务器、装置
CN104519325A (zh) * 2014-12-29 2015-04-15 重庆邮电大学 一种基于4g网络的无线视频监控系统自适应保障方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116074937A (zh) * 2023-04-06 2023-05-05 安徽深迪科技有限公司 基于5g网络技术的智能现场管理方法及管理平台

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