WO2020220954A1 - 一种确定调度优先级的方法及装置 - Google Patents

一种确定调度优先级的方法及装置 Download PDF

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Publication number
WO2020220954A1
WO2020220954A1 PCT/CN2020/083799 CN2020083799W WO2020220954A1 WO 2020220954 A1 WO2020220954 A1 WO 2020220954A1 CN 2020083799 W CN2020083799 W CN 2020083799W WO 2020220954 A1 WO2020220954 A1 WO 2020220954A1
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Prior art keywords
reference information
scheduling
terminal
scheduling reference
priority
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PCT/CN2020/083799
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English (en)
French (fr)
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王峰
陈雨辰
汪凡
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华为技术有限公司
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Publication of WO2020220954A1 publication Critical patent/WO2020220954A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
    • H04W72/566—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
    • 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 embodiments of the present application relate to the field of communication technologies, and in particular, to a method and device for determining scheduling priority.
  • Video surveillance is a technology for monitoring the collected video data after transmission. It is divided into two types: wired video surveillance systems and wireless video surveillance systems.
  • Wireless video monitoring system has the characteristics of low cost, wide application range, good scalability, high mobility, etc., and it is more widely used. However, due to factors such as limited wireless channel bandwidth resources and fluctuations in transmission capacity over time, the transmission delay of wireless video transmission systems will increase significantly. In many video transmission scenarios, users have certain requirements for transmission delay, and too high a delay will bring users a very bad experience.
  • the air interface protocol stack of the fifth generation mobile communication technology includes a user plane protocol and a control plane protocol.
  • the user plane protocol stack consists of the packet data convergence protocol (PDCP) layer and wireless link It consists of a control (radio link control, RLC) layer, a media access control (media access control address, MAC) layer, and a physical layer.
  • RLC radio link control
  • MAC media access control address
  • the data first reaches the PDCP layer, which encrypts the PDCP PDU, and then adds the PDCP header before sending it to the RLC layer.
  • PDCP PDU After PDCP PDU reaches the RLC layer, it will be put into the buffer and wait for transmission.
  • the RLC layer receives the transmission instruction from the MAC layer, it will fetch the data of the corresponding size from the buffer and send it to the MAC layer.
  • the MAC layer will compose this data into a transmission block and send it.
  • the PDCP layer timing mechanism can be used.
  • the PDCP layer checks whether the PDCP PDU in the queue is timed out, and discards the timed out PDCP PDU, which improves the experience of video transmission delay.
  • the PDCP packet loss rate is too high, it will cause serious degradation of the video quality at the receiving end. Therefore, obtaining a lower packet loss rate and lower transmission delay in video transmission needs to be solved urgently.
  • the embodiments of the present application provide a method and device for determining scheduling priority, so as to take into account a lower packet loss rate and a lower transmission delay in video transmission.
  • a method for determining scheduling priority including: an access network device receives scheduling reference information sent by a terminal when it is scheduled, and the scheduling reference information is the buffer of the next data packet to be transmitted in the transmission queue of the terminal Zone status information and/or the number of times the corresponding video frame has been referenced; the access network device determines the scheduling priority of the terminal according to the priority algorithm and scheduling reference information.
  • the method for determining the scheduling priority provided by the present application is combined with the buffer status information of the next data packet to be transmitted in the transmission queue when the terminal is scheduled and/or the reference times of the corresponding video frame to determine the scheduling priority.
  • the buffer status changes in real time
  • the buffer status of the data packet when the terminal is scheduled is the most accurate, so that the determined scheduling priority is more in line with the buffer status of the next data packet to be transmitted, and the PDCP layer timing mechanism guarantees low Under the premise of transmission delay, the high packet loss rate caused by the PDCP layer timing mechanism is avoided.
  • the scheduling is determined based on the number of referenced video frames Priority, under the premise that the PDCP layer timing mechanism guarantees low transmission delay, it avoids the high packet loss rate caused by the discarding of data packets in the video frame with a high number of reference times caused by the PDCP layer timing mechanism.
  • the buffer status information may include at least one of the following information: residence delay in the transmission queue and data packet size. Determine the scheduling priority of the terminal by the resident delay of the data packet in the transmission queue and/or the size of the data packet, so that the scheduling priority determined for the terminal and the residence of the next data packet to be transmitted in the transmission queue
  • the time delay and/or the data packet size are strongly correlated, and a higher priority is configured for the terminal to which the data packet with a longer residence time and/or a large amount of data belongs, so as to prevent the next data packet to be transmitted from being discarded due to the PDCP layer timing mechanism.
  • the access network device when the scheduling reference information is the residence delay in the transmission queue, the access network device follows the priority algorithm and the scheduling Refer to the information to determine the scheduling priority of the terminal, which can be specifically implemented as follows: the access network device obtains the first packet delay of the terminal according to the staying delay, and substitutes the first packet delay of the terminal into the priority algorithm to determine the terminal’s Scheduling priority.
  • the scheduling priority is determined after the delay of the first packet in the queue is determined according to the residence delay. In the scenario where the delay of the first upstream packet cannot be obtained in real time, the delay of obtaining the first packet of the queue is realized to determine the scheduling priority.
  • the access network equipment under the framework of the new radio (NR) protocol cannot obtain the precise first packet delay of each user in real time.
  • a specific implementation of a priority algorithm is provided.
  • the priority algorithm can be implemented as: scheduling a terminal with a large reference information value High priority. For the next data packet to be transmitted in the transmission queue of the terminal with a large value of the scheduling reference information, the probability of its being discarded is greatly reduced.
  • the specific content of the priority algorithm can be configured according to actual needs, which is not specifically limited in this application.
  • this application provides a specific implementation of a priority algorithm.
  • the priority algorithm can be implemented as follows: setting information related to scheduling reference information The factor, which has an increasing function relationship with the scheduling reference information. The increasing function relationship is used to achieve the goal of high scheduling priority for the terminal with a large scheduling reference information value, thereby reducing the probability that the next data packet to be transmitted in the transmission queue of the terminal with a large scheduling reference information value is discarded.
  • the access network device obtains the first packet delay of the terminal in the queue according to the staying delay, which can be specifically implemented as follows:
  • T1 is the time when the access network device receives the residence time delay sent by the terminal for the last time;
  • T2 is the time when the access network device receives the user request of the terminal after T1;
  • T3 is the current time.
  • the access network device receives the scheduling reference information sent by the terminal when it is scheduled, which can be specifically implemented as follows: When the terminal is scheduled, the control information of the data packet sent by the data packet header carries the scheduling reference information.
  • the access network device receives the scheduling reference information sent by the terminal when it is scheduled, which can be specifically implemented as follows:
  • the PDCP protocol data unit (protocol data unit, PDU) that carries the scheduling reference information sent by the terminal when it is scheduled.
  • PDU protocol data unit
  • the existing PDCP layer header control information is used to carry scheduling reference information, which saves resources.
  • the access network device receives the scheduling reference information sent by the terminal when it is scheduled, which can be specifically implemented as follows: The MAC control unit CE carrying scheduling reference information sent by the terminal when it is scheduled.
  • the existing MAC layer header control information is used to carry scheduling reference information, which saves resources.
  • the access network device receives the scheduling reference information sent by the terminal when it is scheduled, which can be specifically implemented as follows: Control information carrying scheduling reference information sent by the terminal when it is scheduled. Among them, the control information is transmitted on the control channel. In this implementation manner, the newly defined control information is used to send scheduling reference information, avoiding modifying the control information in the packet header of the data packet, and the implementation is simple.
  • the foregoing next data packet to be transmitted may include: the first packet to be transmitted other than the data packet currently to be transmitted , Or, the first packet in the queue.
  • the next packet to be transmitted refers to the first packet to be transmitted except the current packet; if the scheduling reference information is passed When the newly defined control information is reported, the next packet to be transmitted is the first packet in the queue.
  • the method may include: a terminal obtains scheduling reference information, where the scheduling reference information is buffer status information and/or buffer status information of the next data packet to be transmitted in the terminal's transmission queue Or the number of times that the corresponding video frame is referenced; when the terminal is scheduled, the scheduling reference information is sent to the access network device, and the scheduling reference information is used by the access network device to determine the scheduling priority of the terminal.
  • the scheduling reference information is buffer status information and/or buffer status information of the next data packet to be transmitted in the terminal's transmission queue Or the number of times that the corresponding video frame is referenced
  • the method for determining the scheduling priority provided by the present application is combined with the buffer status information of the next data packet to be transmitted in the transmission queue when the terminal is scheduled and/or the reference times of the corresponding video frame to determine the scheduling priority.
  • the buffer status changes in real time
  • the buffer status of the data packet when the terminal is scheduled is the most accurate, so that the determined scheduling priority is more in line with the buffer status of the next data packet to be transmitted, and the PDCP layer timing mechanism guarantees low Under the premise of transmission delay, the high packet loss rate caused by the PDCP layer timing mechanism is avoided.
  • the scheduling is determined based on the number of referenced video frames Priority, under the premise that the PDCP layer timing mechanism guarantees low transmission delay, it avoids the high packet loss rate caused by the discarding of data packets in the video frame with a high number of reference times caused by the PDCP layer timing mechanism.
  • the method for determining the scheduling priority provided by the second aspect is the same method as the method for determining the scheduling priority provided by the first aspect, except that the first aspect is described from the perspective of the access network device, and the second aspect is Described from the perspective of the terminal, therefore, the specific implementation of the second aspect may refer to the specific implementation of the above-mentioned first aspect.
  • the terminal sends scheduling reference information to the access network device when being scheduled, which can be specifically implemented as follows: when the terminal is scheduled, the control information in the data packet header carries the scheduling Refer to the information and send the data packet to the access network device.
  • the terminal sends scheduling reference information to the access network device, which can be specifically implemented as follows: the terminal sends a carrying scheduling reference to the access network device PDCP PDU of the information.
  • the existing PDCP layer header control information is used to carry scheduling reference information, which saves resources.
  • the terminal sends scheduling reference information to the access network device, which can be specifically implemented as follows: the terminal sends a carrying scheduling reference to the access network device The MAC CE of the information.
  • the existing MAC layer header control information is used to carry scheduling reference information, which saves resources.
  • the terminal sends scheduling reference information to the access network device, which can be specifically implemented as follows: the terminal sends a carrying scheduling reference to the access network device Information control information. Among them, the control information is transmitted on the control channel. In this implementation manner, the newly defined control information is used to send scheduling reference information, avoiding modifying the control information in the packet header of the data packet, and the implementation is simple.
  • the method may include: the access network device receives the latest scheduling reference information sent by the terminal when the scheduling reference information changes, and the latest scheduling reference information is the terminal’s The latest reference count of the video frame corresponding to the first data packet to be transmitted in the transmission queue; the access network device determines the scheduling priority of the terminal according to the priority algorithm and the latest scheduling reference information.
  • the method for determining the scheduling priority provided in this application is combined with the latest reference count of the video frame corresponding to the first data packet to be transmitted in the terminal transmission queue to determine the scheduling priority. Due to the inter-frame reference mechanism of video transmission, once the data packet of the referenced video frame is discarded, other frames that refer to this frame will be considered as all lost because they cannot be decoded. Therefore, the scheduling priority is determined based on the latest reference times of the video frame. On the premise that the PDCP layer timing mechanism guarantees low transmission delay, the PDCP layer timing mechanism avoids the high packet loss rate caused by the discarding of data packets in the video frame with a high number of references. In addition, the probability of a change in the number of times a video frame is referenced is very small, and the latest scheduling reference information sent by this application when the scheduling reference information changes, reduces system overhead.
  • the difference between the method for determining the scheduling priority provided by the third aspect and the method for determining the scheduling priority provided by the first aspect is: the timing of the terminal sending the scheduling reference information is different, and the content of the scheduling reference information is different
  • the specific implementation of the third aspect may refer to the foregoing first aspect or any possible implementation manners.
  • a specific implementation of a priority algorithm is provided, and the priority algorithm can be implemented as follows: a terminal with a large scheduling reference information has a high scheduling priority. For the next data packet to be transmitted in the transmission queue of the terminal with a large value of the scheduling reference information, the probability of its being discarded is greatly reduced. It should be noted that the specific content of the priority algorithm can be configured according to actual needs, which is not specifically limited in this application.
  • this application provides a specific implementation of a priority algorithm.
  • the priority algorithm can be implemented as follows: setting information related to scheduling reference information The factor, which has an increasing function relationship with the scheduling reference information. The increasing function relationship is used to achieve the goal of high scheduling priority for the terminal with a large scheduling reference information value, thereby reducing the probability that the next data packet to be transmitted in the transmission queue of the terminal with a large scheduling reference information value is discarded.
  • the access network device receives the scheduling reference information sent by the terminal when it is scheduled, which can be specifically implemented as follows:
  • the control information of the data packet sent by the data packet header carries the scheduling reference information.
  • the control information of the existing data packet header is used to carry the scheduling reference information, which saves resources.
  • the scheduling reference information may be carried in PDCP PDU or MAC CE.
  • the access network device receives the scheduling reference information sent by the terminal when it is scheduled, which can be specifically implemented as follows: Control information carrying scheduling reference information sent by the terminal when it is scheduled. Among them, the control information is transmitted on the control channel. In this implementation manner, the newly defined control information is used to send scheduling reference information, avoiding modifying the control information in the packet header of the data packet, and the implementation is simple.
  • the method may include: a terminal monitoring scheduling reference information, where the scheduling reference information is the number of times a video frame corresponding to the first data packet to be transmitted in the transmission queue of the terminal is referenced
  • the terminal sends the latest scheduling reference information to the access network device, and the latest scheduling reference information is used by the access network device to determine the scheduling priority of the terminal.
  • the method for determining the scheduling priority provided in this application is combined with the latest reference count of the video frame corresponding to the first data packet to be transmitted in the terminal transmission queue to determine the scheduling priority. Due to the inter-frame reference mechanism of video transmission, once the data packet of the referenced video frame is discarded, other frames that refer to this frame will be considered as all lost because they cannot be decoded. Therefore, the scheduling priority is determined based on the latest reference times of the video frame. On the premise that the PDCP layer timing mechanism guarantees low transmission delay, the PDCP layer timing mechanism avoids the high packet loss rate caused by the discarding of data packets in the video frame with a high number of references. In addition, the probability of a change in the number of times a video frame is referenced is very small, and the latest scheduling reference information sent by this application when the scheduling reference information changes, reduces system overhead.
  • the method for determining scheduling priority provided by the fourth aspect is the same method as the method for determining scheduling priority provided by the third aspect, except that the third aspect is described from the perspective of the access network device. Described from the perspective of the terminal, therefore, the specific implementation of the fourth aspect may refer to the specific implementation of the third aspect described above.
  • the terminal sends scheduling reference information to the access network device when being scheduled, which can be specifically implemented as follows: when the terminal is scheduled, the control information in the data packet header carries the scheduling Refer to the information and send the data packet to the access network device.
  • the terminal sends scheduling reference information to the access network device, which can be specifically implemented as follows: the terminal sends a carrying scheduling reference to the access network device PDCP PDU of the information.
  • the existing PDCP layer header control information is used to carry scheduling reference information, which saves resources.
  • the terminal sends scheduling reference information to the access network device, which can be specifically implemented as follows: the terminal sends a carrying scheduling reference to the access network device The MAC CE of the information.
  • the existing MAC layer header control information is used to carry scheduling reference information, which saves resources.
  • the terminal sends scheduling reference information to the access network device, which can be specifically implemented as follows: the terminal sends a carrying scheduling reference to the access network device Information control information. Among them, the control information is transmitted on the control channel. In this implementation manner, the newly defined control information is used to send scheduling reference information, avoiding modifying the control information in the packet header of the data packet, and the implementation is simple.
  • a device for determining scheduling priority may be an access network device, a device in an access network device, or a device that can be matched and used with an access network device.
  • the device may include modules that perform one-to-one correspondence of the methods/operations/steps/actions described in the first aspect.
  • the modules may be hardware circuits, software, or hardware circuits combined with software.
  • the device may include a receiving module and a determining module.
  • the receiving module is configured to receive the scheduling reference information sent by the terminal when it is scheduled.
  • the scheduling reference information is the buffer status information of the next data packet to be transmitted in the transmission queue of the terminal and/or the reference times of the corresponding video frame.
  • the determining module is used to determine the scheduling priority of the terminal according to the priority algorithm and the scheduling reference information received by the receiving module.
  • the device for determining the scheduling priority determines the scheduling priority in combination with the buffer status information of the next data packet to be transmitted in the transmission queue when the terminal is scheduled and/or the reference times of the corresponding video frame.
  • the buffer status changes in real time
  • the buffer status of the data packet when the terminal is scheduled is the most accurate, so that the determined scheduling priority is more in line with the buffer status of the next data packet to be transmitted, and the PDCP layer timing mechanism guarantees low Under the premise of transmission delay, the high packet loss rate caused by the PDCP layer timing mechanism is avoided.
  • the scheduling is determined based on the number of referenced video frames Priority, under the premise that the PDCP layer timing mechanism guarantees low transmission delay, it avoids the high packet loss rate caused by the discarding of data packets in the video frame with a high number of reference times caused by the PDCP layer timing mechanism.
  • the apparatus for determining scheduling priority provided in the fifth aspect is used to execute the method for determining scheduling priority provided in the first aspect.
  • the apparatus for determining scheduling priority provided in the fifth aspect is used to execute the method for determining scheduling priority provided in the first aspect.
  • the buffer status information may include at least one of the following information: residence delay in the transmission queue, and data packet size.
  • residence delay in the transmission queue and data packet size.
  • the time delay and/or the data packet size are strongly correlated, and a higher priority is configured for the terminal to which the data packet with a longer residence time and/or a large amount of data belongs, so as to prevent the next data packet to be transmitted from being discarded due to the PDCP layer timing mechanism.
  • the determining module when the scheduling reference information is the residence delay in the transmission queue, the determining module may be specifically used to: according to the residence time The delay obtains the first packet delay of the queue of the terminal, and substitutes the delay of the first queue packet of the terminal into the priority algorithm to determine the scheduling priority of the terminal.
  • the scheduling priority is determined after the delay of the first packet in the queue is determined according to the residence delay. In the scenario where the delay of the first upstream packet cannot be obtained in real time, the delay of obtaining the first packet of the queue is realized to determine the scheduling priority.
  • a specific implementation of a priority algorithm is provided.
  • the priority algorithm can be implemented as: scheduling of a terminal with a large reference information value High priority. For the next data packet to be transmitted in the transmission queue of the terminal with a large value of the scheduling reference information, the probability of its being discarded is greatly reduced.
  • the specific content of the priority algorithm can be configured according to actual needs, which is not specifically limited in this application.
  • this application provides a specific implementation of a priority algorithm.
  • the priority algorithm can be implemented as follows: setting the scheduling reference information related The factor, which has an increasing function relationship with the scheduling reference information. The increasing function relationship is used to achieve the goal of high scheduling priority for the terminal with a large scheduling reference information value, thereby reducing the probability that the next data packet to be transmitted in the transmission queue of the terminal with a large scheduling reference information value is discarded.
  • T1 is the time when the residence time delay sent by the terminal is received for the last time; T2 is the time when the user request of the terminal is received after T1; and T3 is the current time.
  • the receiving module may be specifically configured to: receive a data packet sent by the terminal when being scheduled, and the control information in the packet header of the data packet Carry scheduling reference information.
  • the receiving module may be specifically configured to receive the PDCP PDU carrying the scheduling reference information sent by the terminal when it is scheduled.
  • the existing PDCP layer header control information is used to carry scheduling reference information, which saves resources.
  • the receiving module may be specifically configured to: receive the MAC CE that carries scheduling reference information sent by the terminal when it is scheduled.
  • the existing MAC layer header control information is used to carry scheduling reference information, which saves resources.
  • the receiving module may be specifically configured to receive control information carrying scheduling reference information sent by the terminal when it is scheduled.
  • the control information is transmitted on the control channel.
  • the newly defined control information is used to send scheduling reference information, avoiding modifying the control information in the packet header of the data packet, and the implementation is simple.
  • the foregoing next data packet to be transmitted may include: the first packet to be transmitted other than the data packet currently to be transmitted , Or, the first packet in the queue.
  • a device for determining scheduling priority may be a terminal, a device in the terminal, or a device that can be matched and used with the terminal.
  • the device may include modules that perform one-to-one correspondence of the methods/operations/steps/actions described in the second aspect.
  • the modules may be hardware circuits, software, or hardware circuits combined with software.
  • the device may include an acquisition module and a sending module.
  • the acquiring module is configured to acquire scheduling reference information, where the scheduling reference information is the buffer status information of the next data packet to be transmitted in the transmission queue of the terminal and/or the reference times of the corresponding video frame.
  • the sending module is configured to send the scheduling reference information obtained by the obtaining unit to the access network device when the device is scheduled, and the scheduling reference information is used by the access network device to determine the scheduling priority of the device.
  • the device for determining the scheduling priority determines the scheduling priority in combination with the buffer status information of the next data packet to be transmitted in the transmission queue when being scheduled and/or the reference times of the corresponding video frame.
  • the buffer status changes in real time
  • the buffer status of the data packet is the most accurate when scheduled, so that the determined scheduling priority is more in line with the buffer status of the next packet to be transmitted, and the PDCP layer timing mechanism ensures low transmission Under the premise of time delay, the high packet loss rate caused by the PDCP layer timing mechanism is avoided.
  • due to the inter-frame reference mechanism of video transmission once the data packet of the referenced video frame is discarded, other frames that refer to this frame will be considered lost because they cannot be decoded.
  • the scheduling is determined based on the number of referenced video frames Priority, under the premise that the PDCP layer timing mechanism guarantees low transmission delay, it avoids the high packet loss rate caused by the discarding of data packets in the video frame with a high number of reference times caused by the PDCP layer timing mechanism.
  • the device for determining scheduling priority provided by the sixth aspect is used to execute the method for determining scheduling priority provided by the second aspect.
  • the device for determining scheduling priority provided by the sixth aspect is used to execute the method for determining scheduling priority provided by the second aspect.
  • the sending module is specifically configured to: when being scheduled, carry scheduling reference information in the control information of the data packet header, and send the data packet to the access network device.
  • the sending module is specifically configured to send PDCP PDUs carrying scheduling reference information to the access network device.
  • the existing PDCP layer header control information is used to carry scheduling reference information, which saves resources.
  • the sending module is specifically configured to send a MAC CE carrying scheduling reference information to the access network device.
  • the existing MAC layer header control information is used to carry scheduling reference information, which saves resources.
  • the sending module is specifically configured to send control information carrying scheduling reference information to the access network device.
  • the control information is transmitted on the control channel.
  • the newly defined control information is used to send scheduling reference information, avoiding modifying the control information in the packet header of the data packet, and the implementation is simple.
  • a device for determining scheduling priority may be an access network device, a device in an access network device, or a device that can be used in matching with the access network device.
  • the device may include modules that perform one-to-one correspondence of the methods/operations/steps/actions described in the first aspect.
  • the modules may be hardware circuits, software, or hardware circuits combined with software.
  • the device may include a receiving module and a determining module.
  • the receiving module is configured to receive the latest scheduling reference information sent by the terminal when the scheduling reference information changes.
  • the latest scheduling reference information is the latest reference count of the video frame corresponding to the first data packet to be transmitted in the terminal's transmission queue.
  • the determining module is used to determine the scheduling priority of the terminal according to the priority algorithm and the latest scheduling reference information received by the receiving module.
  • the device for determining the scheduling priority provided by the present application is combined with the latest reference count of the video frame corresponding to the first data packet to be transmitted in the terminal transmission queue to determine the scheduling priority. Due to the inter-frame reference mechanism of video transmission, once the data packet of the referenced video frame is discarded, other frames that refer to this frame will be considered as all lost because they cannot be decoded. Therefore, the scheduling priority is determined based on the latest reference times of the video frame. On the premise that the PDCP layer timing mechanism guarantees low transmission delay, the PDCP layer timing mechanism avoids the high packet loss rate caused by the discarding of data packets in the video frame with a high number of references. In addition, the probability of a change in the number of times a video frame is referenced is very small, and the latest scheduling reference information sent by this application when the scheduling reference information changes, reduces system overhead.
  • the device for determining scheduling priority provided by the seventh aspect is used to implement the method for determining scheduling priority provided by the third aspect.
  • the device for determining scheduling priority provided by the seventh aspect is used to implement the method for determining scheduling priority provided by the third aspect.
  • a specific implementation of a priority algorithm is provided, and the priority algorithm can be implemented as follows: a terminal with a large scheduling reference information has a high scheduling priority. For the next data packet to be transmitted in the transmission queue of the terminal with a large value of the scheduling reference information, the probability of its being discarded is greatly reduced. It should be noted that the specific content of the priority algorithm can be configured according to actual needs, which is not specifically limited in this application.
  • this application provides a specific implementation of a priority algorithm.
  • the priority algorithm can be implemented as follows: setting information related to scheduling reference information The factor, which has an increasing function relationship with the scheduling reference information. The increasing function relationship is used to achieve the goal of high scheduling priority for the terminal with a large scheduling reference information value, thereby reducing the probability that the next data packet to be transmitted in the transmission queue of the terminal with a large scheduling reference information value is discarded.
  • the receiving module is specifically configured to: receive a data packet sent by the terminal when being scheduled, and the control information in the packet header of the data packet carries the scheduling Reference Information.
  • the control information of the existing data packet header is used to carry the scheduling reference information, which saves resources.
  • the scheduling reference information may be carried in PDCP PDU or MAC CE.
  • the receiving module is specifically configured to receive control information carrying scheduling reference information sent by the terminal when being scheduled.
  • the control information is transmitted on the control channel.
  • the newly defined control information is used to send scheduling reference information, avoiding modifying the control information in the packet header of the data packet, and the implementation is simple.
  • a device for determining scheduling priority may be a terminal, a device in the terminal, or a device that can be matched and used with the terminal.
  • the device may include modules that perform one-to-one correspondence of the methods/operations/steps/actions described in the second aspect.
  • the modules may be hardware circuits, software, or hardware circuits combined with software.
  • the device may include a monitoring module and a sending module.
  • the monitoring module is used to monitor scheduling reference information, where the scheduling reference information is the reference count of the video frame corresponding to the first data packet to be transmitted in the transmission queue of the device.
  • the sending module is used to send the latest scheduling reference information to the access network device when the scheduling reference information changes, and the latest scheduling reference information is used for the access network device to determine the scheduling priority of the terminal.
  • the device for determining the scheduling priority provided by the present application is combined with the latest reference count of the video frame corresponding to the first data packet to be transmitted in the transmission queue to determine the scheduling priority. Due to the inter-frame reference mechanism of video transmission, once the data packet of the referenced video frame is discarded, other frames that refer to this frame will be considered as all lost because they cannot be decoded. Therefore, the scheduling priority is determined based on the latest reference times of the video frame. On the premise that the PDCP layer timing mechanism guarantees low transmission delay, the PDCP layer timing mechanism avoids the high packet loss rate caused by the discarding of data packets in the video frame with a high number of references. In addition, the probability of a change in the number of times a video frame is referenced is very small, and the latest scheduling reference information sent by this application when the scheduling reference information changes, reduces system overhead.
  • the device for determining the scheduling priority provided by the eighth aspect is used to execute the method for determining the scheduling priority provided by the fourth aspect, and the specific implementation may refer to the specific implementation of the fourth aspect.
  • the sending module is specifically configured to carry scheduling reference information in the control information of the data packet header when being scheduled, and send the data packet to the access network device.
  • the sending module is specifically configured to send PDCP PDUs carrying scheduling reference information to the access network device.
  • the existing PDCP layer header control information is used to carry scheduling reference information, which saves resources.
  • the sending module is specifically configured to send a MAC CE carrying scheduling reference information to the access network device.
  • the existing MAC layer header control information is used to carry scheduling reference information, which saves resources.
  • the sending module is specifically configured to send control information carrying scheduling reference information to the access network device.
  • the control information is transmitted on the control channel.
  • the newly defined control information is used to send scheduling reference information, avoiding modifying the control information in the packet header of the data packet, and the implementation is simple.
  • an embodiment of the present application provides yet another device for determining scheduling priority.
  • the device includes a processor, configured to implement the method described in the first aspect.
  • the device may further include a memory, the memory is coupled with the processor, and when the processor executes the instructions stored in the memory, the method described in the first aspect can be implemented.
  • the device may also include a communication interface, which is used for the device to communicate with other devices.
  • the communication interface may be a transceiver, circuit, bus, module, or other type of communication interface, and other devices may be terminal.
  • the device includes:
  • Memory used to store instructions
  • the processor is configured to use the communication interface to receive the scheduling reference information sent by the terminal when it is scheduled.
  • the scheduling reference information is the buffer status information of the next data packet to be transmitted in the transmission queue of the terminal and/or the corresponding video frame.
  • Reference times Determine the scheduling priority of the terminal according to the priority algorithm and scheduling reference information.
  • the instructions in the memory in this application can be pre-stored or downloaded from the Internet when the device is used and then stored. This application does not specifically limit the source of the instructions in the memory.
  • the coupling in the embodiments of the present application is an indirect coupling or connection between devices, units or modules, which can be electrical, mechanical or other forms, and is used for information exchange between devices, units or modules.
  • an embodiment of the present application provides yet another device for determining scheduling priority.
  • the device includes a processor, configured to implement the method described in the second aspect.
  • the device may further include a memory, the memory is coupled with the processor, and when the processor executes the instructions stored in the memory, the method described in the second aspect can be implemented.
  • the device may also include a communication interface, which is used for the device to communicate with other devices.
  • the communication interface may be a transceiver, circuit, bus, module, or other type of communication interface, and other devices may be Access network equipment.
  • the device includes:
  • Memory used to store instructions
  • the processor obtains scheduling reference information, where the scheduling reference information is the buffer status information of the next data packet to be transmitted in the terminal's transmission queue and/or the reference times of the corresponding video frame; when being scheduled, the communication interface is used to send
  • the access network device sends the scheduling reference information, and the scheduling reference information is used by the access network device to determine the scheduling priority of the terminal.
  • an embodiment of the present application provides yet another device for determining scheduling priority.
  • the device includes a processor for implementing the method described in the third aspect.
  • the device may further include a memory, the memory is coupled to the processor, and when the processor executes the instructions stored in the memory, the method described in the third aspect can be implemented.
  • the device may also include a communication interface, which is used for the device to communicate with other devices.
  • the communication interface may be a transceiver, circuit, bus, module, or other type of communication interface, and other devices may be terminal.
  • the device includes:
  • Memory used to store instructions
  • the processor is configured to use the communication interface to receive the latest scheduling reference information sent by the terminal when the scheduling reference information changes, and the latest scheduling reference information is the latest video frame corresponding to the first data packet to be transmitted in the transmission queue of the terminal The number of times of being referenced; according to the priority algorithm and the latest scheduling reference information, the scheduling priority of the terminal is determined.
  • an embodiment of the present application provides yet another device for determining scheduling priority.
  • the device includes a processor, configured to implement the method described in the fourth aspect.
  • the device may further include a memory, which is coupled to the processor, and when the processor executes the instructions stored in the memory, the method described in the fourth aspect can be implemented.
  • the device may also include a communication interface, which is used for the device to communicate with other devices.
  • the communication interface may be a transceiver, circuit, bus, module, or other type of communication interface, and other devices may be Access network equipment.
  • the device includes:
  • Memory used to store instructions
  • the processor monitors scheduling reference information, where the scheduling reference information is the number of times that the video frame corresponding to the first data packet to be transmitted in the terminal's transmission queue has been referenced; when the scheduling reference information changes, the communication interface is used to communicate to the access network device The latest scheduling reference information is sent, and the latest scheduling reference information is used by the access network device to determine the scheduling priority of the terminal.
  • an embodiment of the present application provides a chip system.
  • the chip system includes a processor and may also include a memory for implementing the function of the access network device in the above method.
  • the chip system can be composed of chips, or can include chips and other discrete devices.
  • an embodiment of the present application provides a chip system, which includes a processor and may also include a memory, configured to implement the functions of the terminal in the foregoing method.
  • the chip system can be composed of chips, or can include chips and other discrete devices.
  • a communication system in a sixteenth aspect, includes a first communication device and a second communication device.
  • the first communication device can implement the method of the first aspect or any possible implementation of the first aspect
  • the second communication device may implement the method of the second aspect or any possible implementation method of the second aspect.
  • the first communication device is an access network device
  • the second communication device is a terminal.
  • a communication system in a seventeenth aspect, includes a third communication device and a fourth communication device.
  • the third communication device can implement the method of the third aspect or any possible implementation of the third aspect
  • the fourth communication device may implement the method of the fourth aspect or any possible implementation method of the fourth aspect.
  • the third communication device is an access network device
  • the fourth communication device is a terminal.
  • Figure 1 is a schematic diagram of the architecture of the communication system applied by the solution of this application.
  • FIG. 2 is a schematic structural diagram of a communication device provided by an embodiment of this application.
  • FIG. 3 is a schematic flowchart of a method for determining scheduling priority provided by an embodiment of the application
  • FIG. 4 is a schematic structural diagram of a type of PDCP control PDU provided by an embodiment of this application.
  • FIG. 5 is a schematic diagram of the internal architecture of a delay PDU provided by an embodiment of the application.
  • FIG. 6 is an internal schematic diagram of a MAC PDU provided by an embodiment of the application.
  • Figure 6a is a schematic diagram of the internal architecture of the LCID field in a MAC PDU provided by an embodiment of the application;
  • FIG. 7 is a schematic flowchart of another method for determining scheduling priority provided by an embodiment of this application.
  • FIG. 8 is a schematic structural diagram of an apparatus for determining scheduling priority provided by an embodiment of the application.
  • FIG. 9 is a schematic structural diagram of another apparatus for determining scheduling priority provided by an embodiment of the application.
  • FIG. 10 is a schematic structural diagram of yet another apparatus for determining scheduling priority provided by an embodiment of the application.
  • FIG. 11 is a schematic structural diagram of yet another apparatus for determining scheduling priority provided by an embodiment of the application.
  • FIG. 12 is a schematic structural diagram of another apparatus for determining scheduling priority provided by an embodiment of the application.
  • words such as “first” and “second” are used to distinguish the same items or similar items with basically the same function and effect. Those skilled in the art can understand that words such as “first” and “second” do not limit the quantity and order of execution, and words such as “first” and “second” do not limit the difference.
  • words such as “exemplary” or “for example” are used as examples, illustrations, or illustrations. Any embodiment or design solution described as “exemplary” or “for example” in the embodiments of the present application should not be construed as being more preferable or advantageous than other embodiments or design solutions. To be precise, words such as “exemplary” or “for example” are used to present related concepts in a specific manner to facilitate understanding.
  • A/B can mean A or B; "and/or” in this application is only It is a kind of association relationship that describes the associated objects, which means that there can be three kinds of relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone, where A, B It can be singular or plural.
  • plural means two or more than two.
  • the following at least one item (a)” or similar expressions refers to any combination of these items, including any combination of a single item (a) or plural items (a).
  • at least one item (a) of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple .
  • At least one can also be described as one or more, and the multiple can be two, three, four or more, which is not limited in this application.
  • the technical feature is distinguished by “first”, “second”, “third”, “A”, “B”, “C”, and “D”.
  • the technical features in the “first”, “second”, “third”, “A”, “B”, “C” and “D” describe the technical features in no order or size order.
  • the 5G air interface protocol stack includes a user plane protocol and a control plane protocol.
  • the user plane mainly performs user data transmission, and the control plane mainly operates on control signaling.
  • the user plane protocol stack is composed of the PDCP layer, RLC layer, MAC layer and physical layer.
  • the PDCP layer processes the IP packets from the data plane, and its functions include header compression and decompression, encryption and decryption, and discarding overtime user plane data.
  • the RLC layer is responsible for segmentation/concatenation and reassembly of the RLC service data unit (SDU) to fit the size specified by the MAC layer.
  • the MAC layer is responsible for matching logical channels and transmission channels.
  • the physical layer is responsible for the transmission of the bit stream of data.
  • the PDCP layer, RLC layer and MAC layer have corresponding PDUs and SDUs. PDU is the data unit sent to the lower layer, and SDU is the data unit received from the upper layer.
  • the PDCP layer timing mechanism is currently used in wireless video transmission.
  • the data first reaches the PDCP layer, which encrypts the PDCP PDU, and then adds the PDCP header and sends it to the RLC layer.
  • PDCP PDU After PDCP PDU reaches the RLC layer, it will be put into the buffer and wait for transmission.
  • the RLC layer receives the transmission instruction from the MAC layer, it will fetch data of the corresponding size from the cache and send it to the MAC layer.
  • the MAC layer composes this data into a transmission block and sends it.
  • the PDCP layer checks whether the PDCP PDU in the queue has timed out.
  • the corresponding PDCP PDU will be discarded.
  • the timeout video data is discarded to avoid wasting resources on the timeout video data, thereby improving the overall video transmission delay experience.
  • the PDCP packet loss rate is too high, the video quality at the receiving end will be seriously degraded.
  • video images include I frames and P frames.
  • an I frame is also called an intra-frame coded frame, which is an independent frame with all its own information and can be decoded independently without referring to other images.
  • P-frame is also called inter-frame prediction coding frame. It needs to refer to the previous I frame to be encoded. It represents the difference between the current frame picture and the previous frame (the previous frame may be an I frame or a P frame).
  • P frame decoding It is necessary to superimpose the difference defined in this frame with the previously buffered picture to generate the final picture.
  • P frames usually occupy fewer data bits. Since the data volume of I frames is much larger than that of P frames, I frames with high importance are more likely to be discarded due to timeout.
  • the delay factor can be considered when scheduling, and a higher scheduling priority can be set for users with high first packet delay in the queue. Achieve lower packet loss rate and lower transmission delay.
  • the delay factor due to the inter-frame reference mechanism of video transmission, only the delay factor is considered when scheduling, and the number of times the video frame corresponding to each data packet is referenced is not considered. I frames with high importance are more likely to be discarded due to timeouts. The frame loss rate at the receiving end is too high.
  • the scheduling algorithm that considers the delay factor needs to know the delay of the first packet of the user queue. This information changes in real time, and in the uplink transmission system, the accurate first packet delay information of each user cannot be obtained in real time.
  • this application proposes a method for determining scheduling priority, which is used to determine the scheduling priority for users in video transmission, taking into account a lower packet loss rate and a lower transmission delay.
  • the basic principle is to combine the buffer status of the data packet to be transmitted and/or the reference times of the corresponding video frame when determining the scheduling priority, so that the determined scheduling priority is more in line with the buffer status of the data packet to be transmitted and/ Or related to the number of times the corresponding video frame is referenced, the PDCP layer timing mechanism can avoid the high packet loss rate caused by the PDCP layer timing mechanism under the premise that the PDCP layer timing mechanism guarantees low transmission delay.
  • the terminal involved in the embodiments of this application can be a device with wireless transceiver function, which can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; or on the water (such as ships, etc.); Deploy in the air (for example, on airplanes, balloons, satellites, etc.).
  • the terminal may be a user equipment (UE), where the UE includes a handheld device with a wireless communication function, a vehicle-mounted device, a wearable device, or a computing device.
  • the UE may be a mobile phone, a tablet computer, or a computer with wireless transceiver function.
  • Terminal equipment can also be virtual reality (VR) terminal equipment, augmented reality (augmented reality, AR) terminal equipment, wireless terminals in industrial control, wireless terminals in unmanned driving, wireless terminals in telemedicine, and smart Wireless terminals in power grids, wireless terminals in smart cities, wireless terminals in smart homes, and so on.
  • the device used to implement the function of the terminal may be a terminal; it may also be a device capable of supporting the terminal to implement the function, such as a chip system, and the device may be installed in the terminal.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the device used to implement the functions of the terminal is a terminal, and the terminal is a UE as an example to describe the technical solutions provided in the embodiments of the present application.
  • the access network equipment involved in the embodiment of the present application includes a base station (base station, BS), which may be a device that is deployed in a wireless access network and can communicate with a terminal wirelessly.
  • the base station may have many forms, such as macro base stations, micro base stations, relay stations, and access points.
  • the base station involved in the embodiment of this application may be a base station in 5G or a base station in a long term evolution (long term Evolution, LTE) system, where the base station in 5G may also be referred to as a transmission reception point. , TRP) or gNB.
  • the device used to implement the function of the access network device may be the access network device; it may also be a device capable of supporting the access network device to implement the function, such as a chip system, which can be installed in the access network device.
  • the device used to implement the functions of the network equipment is an access network device, and the access network equipment is a base station as an example to describe the technical solutions provided in the embodiments of the present application.
  • the technical solutions provided in the embodiments of the present application can be applied to wireless communication between communication devices.
  • the wireless communication between communication devices may include: wireless communication between a network device and a terminal, wireless communication between a network device and a network device, and wireless communication between a terminal and a terminal.
  • wireless communication can also be referred to as "communication” for short, and the term “communication” can also be described as "data transmission", "information transmission” or “transmission”.
  • This technical solution can be used for wireless communication between a scheduling entity and a subordinate entity.
  • Those skilled in the art can use the technical solution provided by the embodiments of this application to perform wireless communication between other scheduling entities and subordinate entities, such as macro base stations and micro base stations.
  • the embodiment of the present application uses communication between the access network device and the terminal device as an example to describe the method provided in the embodiment of the present application.
  • FIG. 1 shows a schematic diagram of a communication system to which the technical solution provided in the embodiments of the present application is applicable.
  • the communication system may include one or more access network devices 100 (only one is shown) and can be connected to One or more terminals 200 (only one is shown) through which the network device 100 communicates.
  • FIG. 1 is only a schematic diagram, and does not constitute a limitation on the application scenarios of the technical solutions provided by the embodiments of the present application.
  • the access network device 100 may be a TRP, a base station, a relay station, or an access point.
  • the access network device 100 may be a network device in a 5G communication system or an access network device in a future evolution network; it may also be a wearable device or a vehicle-mounted device.
  • the access network device 100 may also be: a base transceiver station (BTS) in a global system for mobile communication (GSM) or code division multiple access (CDMA) network It may also be an NB (NodeB) in wideband code division multiple access (WCDMA), or an eNB or eNodeB (evolutional NodeB) in LTE.
  • the access network device 100 may also be a wireless controller in a cloud radio access network (cloud radio access network, CRAN) scenario.
  • cloud radio access network cloud radio access network, CRAN
  • the terminal 200 may be a UE, an access terminal, a UE unit, a UE station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a UE terminal, a wireless communication device, a UE agent, or a UE device.
  • the access terminal can be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), with wireless communication Functional handheld devices, computing devices, processing devices, in-vehicle devices, wearable devices, terminals in 5G networks or terminals in the future evolved public land mobile network (PLMN) network, etc.
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • the communication system shown in Figure 1 can be an LTE system, an LTE-Advanced system, an NR system, an ultra-reliable and low-latency communication (URLLC) scenario, and a narrowband internet (narrowband internet). of things (NB-IoT) systems, enhanced machine type communications (eMTC) systems, etc., but the communication systems to which the method provided in the embodiments of the present application is applicable are not limited to the above-mentioned communication systems.
  • NB-IoT narrowband internet
  • eMTC enhanced machine type communications
  • the technical solutions provided in the embodiments of the present application can be applied to various access technologies.
  • it can be applied to orthogonal multiple access (orthogonal multiple access, OMA) technology or non-orthogonal multiple access (non-orthogonal multiple access, NOMA) technology.
  • orthogonal multiple access technology it can be applied to orthogonal frequency division multiple access (orthogonal frequency division multiple access, OFDMA) or single carrier frequency division multiple access (single carrier frequency division multiple access, SC-FDMA) and other technologies .
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single carrier frequency division multiple access
  • SCMA sparse code multiple access
  • MUSA multi-user shared access
  • MUSA pattern split multiple access Access
  • PDMA pattern division multiple access
  • IGMA interleave-grid multiple access
  • RSMA resource spreading multiple access
  • NCMA non-orthogonal coded multiple access
  • NOCA non-orthogonal coded access
  • multiple antennas can be deployed on the access network device 100 and/or the terminal 200, and the multiple antenna technology is used for communication, which significantly improves the performance of the wireless communication system.
  • the access network device 100 is the transmitting end and the terminal 200 is the receiving end; in another possible implementation manner, the terminal 200 is the transmitting end and the network device 100 is the receiving end.
  • the transmitting end can use multiple antennas to send a signal to the receiving end, and the receiving end can use one or more antennas to receive the signal; or the transmitting end can use one antenna to send a signal to the receiving end.
  • the terminal can use multiple antennas to receive the signal.
  • Video frame video is composed of continuous images, and a video frame is an image.
  • the video frame is the data unit of the application layer.
  • Data packets, video frame transmission and the network layer will correspond to one or more IP packets, and the PDCP layer will correspond to one or more PDCP layer data packets.
  • the transmission queue refers to the collection of data packets waiting to be sent in the terminal buffer.
  • the residency delay refers to the length of time from the moment a data packet arrives in the terminal buffer to the current moment.
  • the first packet delay in the queue refers to the resident delay of the first data packet to be transmitted in the terminal transmission queue.
  • FIG. 2 shows a communication device 20 related to various embodiments of the present application.
  • the communication device 20 may be the access network device 100 or the terminal 200 in the communication system shown in FIG. 1.
  • the communication device 20 may include: a processor 201, a memory 202, and a communication interface 203.
  • the components of the communication device 20 are specifically introduced below in conjunction with FIG. 2:
  • the memory 202 may be a volatile memory (volatile memory), such as a random-access memory (RAM); or a non-volatile memory (non-volatile memory), such as a read-only memory (read-only memory). , ROM), flash memory (flash memory), hard disk (HDD) or solid-state drive (solid-state drive, SSD); or a combination of the above types of memory for storing programs that can implement the method of this application Code, and configuration files. It should be noted that the program codes and configuration files that can implement the method of the present application stored in the memory 202 may be pre-configured or downloaded via the Internet, which is not specifically limited in the embodiment of the present application.
  • the processor 201 is the control center of the communication device 20, which may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or is configured to implement the embodiments of the present application One or more integrated circuits, such as one or more microprocessors (digital singnal processors, DSP), or one or more field programmable gate arrays (FPGA).
  • the processor 201 may execute various functions of the communication device 20 by running or executing software programs and/or modules stored in the memory 202, and calling data stored in the memory 202.
  • the communication interface 203 is used for the communication device 20 to interact with other units.
  • the communication interface 203 may be a transceiver, circuit, module, or interface.
  • the communication interface 203 may also be used to communicate with a communication network, such as Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc.
  • the communication interface 203 may include a receiving unit to implement a receiving function, and a sending unit to implement a sending function.
  • the embodiment of the present application does not limit the specific connection medium between the communication interface 203, the processor 201, and the memory 202.
  • the memory 202, the processor 201, and the communication interface 203 are connected by a bus in FIG. 2, and the bus is represented by a thick line in FIG. 2.
  • the connection mode between other components is only for schematic illustration. It is not limited.
  • the bus can be divided into address bus, data bus, control bus, etc. For ease of representation, only one thick line is used in FIG. 2, but it does not mean that there is only one bus or one type of bus.
  • the processor 201 executes the following functions by running or executing software programs and/or modules stored in the memory 202, and calling data stored in the memory 202:
  • the scheduling reference information sent by the terminal when it is scheduled is received through the communication interface 203.
  • the scheduling reference information is the buffer status information of the next data packet to be transmitted in the transmission queue of the terminal and/or the reference times of the corresponding video frame; Level algorithm and scheduling reference information determine the scheduling priority of the terminal.
  • the processor 201 executes the following functions by running or executing software programs and/or modules stored in the memory 202, and calling data stored in the memory 202:
  • the scheduling reference information is the buffer status information of the next data packet to be transmitted in the terminal's transmission queue and/or the number of times the corresponding video frame is referenced; when it is scheduled, it is accessed through the communication interface 203
  • the network device sends the scheduling reference information, and the scheduling reference information is used by the access network device to determine the scheduling priority of the communication device 20.
  • the processor 201 executes the following functions by running or executing software programs and/or modules stored in the memory 202, and calling data stored in the memory 202:
  • the latest scheduling reference information is the latest reference count of the video frame corresponding to the first data packet to be transmitted in the transmission queue of the terminal;
  • the priority algorithm and the latest scheduling reference information determine the scheduling priority of the terminal.
  • the processor 201 executes the following functions by running or executing software programs and/or modules stored in the memory 202, and calling data stored in the memory 202:
  • the scheduling reference information is the number of times the video frame corresponding to the first data packet to be transmitted in the terminal's transmission queue is referenced; when the scheduling reference information changes, the latest information is sent to the access network device through the communication port 203 The latest scheduling reference information is used by the access network device to determine the scheduling priority of the communication device 20.
  • the structure of the communication device shown in FIG. 2 does not constitute a limitation on the communication device, and may include more or fewer components than shown in the figure, or combine some components, or arrange different components.
  • an embodiment of the present application provides a method for determining a scheduling priority, which is applied to an access network device in a communication system to determine a scheduling priority for a terminal.
  • the method for determining the scheduling priority for each terminal communicating with it is the same.
  • the embodiment of this application only describes the process of the access network device interacting with a terminal to determine the scheduling priority for the terminal. Explain one by one.
  • a method for determining scheduling priority may include:
  • the terminal obtains scheduling reference information.
  • the scheduling reference information is the buffer status information of the next data packet to be transmitted in the transmission queue of the terminal and/or the reference times of the corresponding video frame.
  • the next data packet to be transmitted may include: the first data packet to be transmitted other than the data packet currently to be transmitted, or the first packet in the queue.
  • the next data packet to be transmitted has different definitions, which are not specifically limited in the embodiment of the present application.
  • the next packet to be transmitted refers to the first packet to be transmitted except the current packet to be transmitted. If the scheduling reference information is reported through the newly defined control information, the next packet to be transmitted is the first packet in the queue.
  • the definition of the next data packet to be transmitted can be configured according to actual requirements, and the embodiment of the present application does not specifically limit this.
  • the buffer status information is used to reflect the characteristics of the next data packet to be transmitted in the buffer in the transmission queue of the terminal, which is strongly related to the quality of video transmission.
  • the stronger the state of a certain buffer of the data packet the more the data packet needs to be scheduled first to ensure the delay and quality of video transmission, and the content of the buffer state information is configured according to actual needs.
  • the buffer status information may include at least one of the following information: residence time delay in the transmission queue, and data packet size.
  • the data packets with extended residency are scheduled earlier, they can be prevented from being discarded by the PDCP timing mechanism, which improves the quality of video transmission, so the residency delay can be used as buffer status information.
  • Data packets with a large amount of data will have a greater impact on the quality of video transmission if they are discarded. If they are scheduled first, they can be avoided by the PDCP timing mechanism to improve the quality of video transmission. Therefore, the size of the data packet can be used as buffer status information .
  • the content of the buffer status information is other, and is not limited to the resident delay in the transmission queue and/or the data packet size exemplified here.
  • the number of reference times of the video frame corresponding to the data packet is the number of times that the video frame generating the data packet is referenced by other frames.
  • the content of the scheduling reference information may be an internal operating parameter of the terminal, which can be obtained by directly reading the terminal in S301.
  • the scheduling reference information may be a parameter stored in the application layer and transmitted from the application layer to the network layer.
  • the network layer of the terminal only needs to receive the scheduling reference information transmitted by the application layer. It should be noted that the information transmission process between the application layer and the network layer is not limited in this article.
  • S302 When the terminal is scheduled, it sends scheduling reference information to the access network device.
  • the scheduling reference information sent by the terminal to the access network device in S302 is the scheduling reference information acquired by the terminal in S301.
  • the scheduling reference information sent by the terminal is used by the access network device to determine the scheduling priority of the terminal.
  • the physical layer when the terminal is scheduled by the access network device, the physical layer will receive the scheduling instruction, the physical layer sends the scheduling instruction to the MAC layer, the MAC sends the transmission instruction to the RLC layer, and the RLC layer takes data of the scheduled size from the buffer as Data packets are transmitted.
  • the specific implementation manner for sending scheduling reference information to the access network device may include but not limited to the following two implementations:
  • the terminal when the terminal is scheduled, it can use the existing control information in the header of each layer of the data packet to be transmitted to carry the scheduling reference information, and transmit it on the data channel to achieve transmission to the access network device. Scheduling reference information.
  • the next packet to be transmitted refers to the first packet to be transmitted except the current packet to be transmitted.
  • S302 may be specifically implemented as: when the terminal is scheduled, it sends a PDCP PDU carrying scheduling reference information to the access network device.
  • the terminal can carry the scheduling reference information in the newly defined PDU and send it to the access network device.
  • the terminal reports the residence delay in the queue of the next packet to be transmitted in the transmission queue through PDCP PDU (the scheduling reference information example in this example is the residence delay, which is not a limitation on the scheduling reference information) .
  • Figure 4 shows the types of PDCP control PDUs.
  • ROHC robust header compression
  • LWA LWA WLAN aggregation
  • LWA status report LWA status report
  • 011
  • Figure 5 shows the internal architecture of a delay PDU.
  • the first bit is 0 to indicate that the PDU is a control PDU
  • the 2-4 bit is 111 to indicate that the PDU type is a newly defined delay PDU
  • the 5th to 8th bits are reserved Bits
  • 9-16 bits are the time delay after quantization.
  • S302 may be specifically implemented as: when the terminal is scheduled, it sends a MAC CE carrying scheduling reference information to the access network device.
  • the terminal can carry the scheduling reference information in the newly defined MAC CE and send it to the access network device.
  • Fig. 6 is an internal schematic diagram of a MAC PDU.
  • a MAC PDU includes a MAC header, 0 or more MAC CEs, 0 or more MAC SDUs, and padding, where Padding is optional.
  • MAC CE, MAC SDU, and padding form the MAC payload.
  • the MAC header includes multiple MAC sub-headers. Each MAC sub-header corresponds to a MAC CE or MAC SDU or Padding.
  • the LCID field in the sub-header is used to indicate which MAC the sub-header corresponds to. SDU or MAC CE or Padding.
  • Figure 6a illustrates the internal architecture of the LCID field in the MAC PDU.
  • the LCID has a total of 5 bits.
  • the index in the figure indicates the specific value of the LCID, and the LCID values indicate the type of MAC CE or MAC SDU or padding.
  • 00000 is the common control channel (CCCH)
  • 00001-01010 is the identification of the logical channel (Identity of the logical channel)
  • 00111-11000 is the reserved field of the LCID
  • 11001 is the extended power headroom Report (extended power headroom report)
  • 11010 is power headroom report
  • 11011 is cell radio network temporary identifier (C-RNTI)
  • 11100 is truncated buffer status report (buffer status report, BSR)
  • 11101 is a short BSR (Short BSR)
  • 11110 is a long BSR (Long BSR)
  • 11111 is padding.
  • the reserved field of the LCID is used to define a new MAC CE, which is called a delayed MAC CE.
  • the MAC layer uploads the residence delay of the next data packet to be transmitted in the transmission queue through the delay MAC and CE.
  • the implementation of defining the delay MAC CE may be: when the LCID Index in the sub-header is defined as 01011, the LCID values are the delay MAC CE. After receiving the MAC PDU, the base station reads the value of the LCID in the sub-header as 01011, and then knows that the sub-header corresponds to the delay MAC CE. Since the length of the MAC CE or MAC SDU or padding corresponding to each LCID Index is determined, the position of the delayed MAC CE can be found in the MAC PDU. For example, the length of the delay MAC CE can be set to 2 bytes, that is, 16 bits. If the delay quantization interval is 1 millisecond, it can represent a delay of 0-65535 milliseconds.
  • the length of the delay MAC CE can be configured according to actual requirements, and it is only an integer byte, which is not specifically limited in the embodiment of the present application.
  • the terminal sends control information carrying scheduling reference information to the access network device.
  • the newly defined control information is used to send scheduling reference information, and the control information is transmitted on the control channel.
  • the access network device receives the scheduling reference information sent by the terminal when it is scheduled.
  • the scheduling reference information received by the access network device in S303 is the scheduling reference information sent by the terminal when being scheduled in S302.
  • the access network device in S303 can receive the scheduling reference information sent by the terminal when it is scheduled through but not limited to the following two implementations, including:
  • Implementation mode 1 When the receiving terminal of the access network device is scheduled, it uses the scheduling reference information carried in the existing control information in the header of each layer of the data packet to be transmitted, and the scheduling reference information is transmitted on the data channel.
  • the access network device may receive the PDCP PDU carrying scheduling reference information sent by the terminal when it is scheduled.
  • the specific implementation of this method has been described in detail in S302, and will not be repeated here.
  • the access network device may receive the MAC CE that carries scheduling reference information sent by the terminal when it is scheduled.
  • the specific implementation of this method has been described in detail in S302, and will not be repeated here.
  • Implementation mode 2 The access network device receives the control information carrying scheduling reference information sent by the terminal when it is scheduled, and the control information is transmitted on the control channel.
  • the access network device determines the scheduling priority of the terminal according to the priority algorithm and the scheduling reference information.
  • the priority algorithm may include: a terminal with a larger value of the scheduling reference information has a higher scheduling priority.
  • the specific content of the priority algorithm is not specifically limited in the embodiment of this application. Any priority algorithm with a high scheduling priority for a terminal with a large scheduling reference information value can be used as the priority described in S304 algorithm.
  • the embodiment of the present application provides the content of a specific priority algorithm, which may include: setting a factor related to the scheduling reference information, and the factor and the scheduling reference information are in an increasing function relationship.
  • the increasing function relationship may include, but is not limited to, at least one of the following function relationships: monotonically increasing linear function, exponential function, logarithmic function, power function, and so on.
  • the priority algorithm may only include factors related to scheduling reference information.
  • the priority algorithm may also include factors related to scheduling reference information and other factors, which are not specifically limited in the embodiment of the application. .
  • the priority algorithm may be a proportional fairness algorithm, a polling algorithm, a maximum load interference algorithm, etc., which are not specifically limited in this application.
  • the calculation formula is Among them, P k represents the scheduling priority of the k-th user, and the larger the value of P k , the higher the priority.
  • R k and T k respectively represent the current rate and historical cumulative average rate of the k-th user.
  • the access network device in S304 determines the scheduling priority of the terminal according to the priority algorithm and the scheduling reference information, which may include: The first packet delay in the queue of the terminal is acquired according to the residence delay, and the first packet delay in the queue of the terminal is substituted into the priority algorithm to determine the scheduling priority of the terminal.
  • T1 is the time when the residence time delay sent by the terminal is received for the last time
  • T2 is the time when the user request of the terminal is received after T1
  • T3 is the current time.
  • the user request can be a contention access request, an uplink scheduling request, or others.
  • the access network device and each terminal in communication with it execute the above-mentioned procedures from S301 to S304, determine a scheduling priority for each terminal, and schedule each terminal according to the determined scheduling priority.
  • the method for determining the scheduling priority provided in this application is combined with the buffer status information of the next data packet to be transmitted in the transmission queue when the terminal is scheduled and/or the reference times of the corresponding video frame to determine the scheduling priority.
  • the buffer status changes in real time
  • the buffer status of the data packet when the terminal is scheduled is the most accurate, so that the determined scheduling priority is more in line with the buffer status of the next data packet to be transmitted, and the PDCP layer timing mechanism guarantees low Under the premise of transmission delay, the high packet loss rate caused by the PDCP layer timing mechanism is avoided.
  • the scheduling is determined based on the number of referenced video frames Priority, under the premise that the PDCP layer timing mechanism guarantees low transmission delay, it avoids the high packet loss rate caused by the discarding of data packets in the video frame with a high number of reference times caused by the PDCP layer timing mechanism.
  • Another method for determining scheduling priority provided by an embodiment of the present application, as shown in FIG. 7, may include:
  • the terminal monitors scheduling reference information.
  • the scheduling reference information is the reference count of the video frame corresponding to the first data packet to be transmitted in the transmission queue of the terminal.
  • the latest scheduling reference information is used for the access network device to determine the scheduling priority of the terminal.
  • the manner in which the terminal sends the latest scheduling reference information in S702 can refer to the manner in which the terminal sends the scheduling reference information to the access network device in S302, which will not be repeated here.
  • S703 The access network device receives the latest scheduling reference information sent by the terminal when the scheduling reference information changes.
  • the terminal sends the latest scheduling reference information to the access network device.
  • the manner in which the access network device receives the latest scheduling reference information in S703 can refer to the manner in which the access network device receives the scheduling reference information in S303, which will not be repeated here.
  • the access network device determines the scheduling priority of the terminal according to the priority algorithm and the latest scheduling reference information.
  • the priority algorithm may include: a terminal with a larger value of the scheduling reference information has a higher scheduling priority.
  • the priority algorithm includes: setting a factor related to the scheduling reference information, and the factor and the scheduling reference information are in an increasing function relationship.
  • S704 is the same as the specific implementation of S304, and the content of the aforementioned S304 can be referred to, which will not be repeated here.
  • the access network device and each terminal communicating with it perform the above-mentioned procedures from S701 to S704, determine a scheduling priority for each terminal, and schedule each terminal according to the determined scheduling priority.
  • the method for determining the scheduling priority provided in this application is combined with the latest reference count of the video frame corresponding to the first data packet to be transmitted in the terminal transmission queue to determine the scheduling priority. Due to the inter-frame reference mechanism of video transmission, once the data packet of the referenced video frame is discarded, other frames that refer to this frame will be considered as all lost because they cannot be decoded. Therefore, the scheduling priority is determined based on the latest reference times of the video frame. On the premise that the PDCP layer timing mechanism guarantees low transmission delay, the PDCP layer timing mechanism avoids the high packet loss rate caused by the discarding of data packets in the video frame with a high number of references. In addition, the probability of a change in the number of times a video frame is referenced is very small, and the latest scheduling reference information sent by this application when the scheduling reference information changes, reduces system overhead.
  • the methods provided in the embodiments of the present application are introduced from the perspective of the access network device, the terminal, and the interaction between the access network device and the terminal.
  • the access network device and terminal may include a hardware structure and/or a software module, and the above various functions are implemented in the form of a hardware structure, a software module, or a hardware structure plus a software module.
  • Features. Whether one of the above-mentioned functions is executed in a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraint conditions of the technical solution.
  • the division of modules in the embodiments of the present application is illustrative, and is only a logical function division. In actual implementation, there may be other division methods.
  • the functional modules in the various embodiments of the present application may be integrated into one process. In the device, it can also exist alone physically, or two or more modules can be integrated into one module.
  • the above-mentioned integrated modules can be implemented in the form of hardware or software functional modules.
  • the apparatus 80 for determining scheduling priority is used to implement the function of the access network device in the above method.
  • the device 80 may be an access network device, a device in an access network device, or a device that can be matched and used with the access network device.
  • the device 80 for determining the scheduling priority may be a chip system.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the device 80 for determining the scheduling priority may include: a receiving module 801 and a determining module 802.
  • the receiving module 801 is used to execute the procedures S303 and S703 in FIG. 3 or FIG.
  • the determining module 802 is used to execute the procedures S304 and S704 in FIG. 3 or FIG. 7. Among them, all relevant content of each step involved in the above method embodiment can be cited in the function description of the corresponding function module, and will not be repeated here.
  • an apparatus 90 for determining a scheduling priority is used to implement the function of the access network device in the foregoing method.
  • the device 90 for determining the scheduling priority may be an access network device, or a device in the access network device, or a device that can be matched and used with the access network device.
  • the device 90 for determining the scheduling priority may be a chip system.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the apparatus 90 for determining the scheduling priority includes at least one processing module 901 for implementing the function of accessing network equipment in the method provided in the embodiment of the present application.
  • the processing module 901 may be used to execute the processes S304 and S704 in FIG. 3 or FIG. 7.
  • the processing module 901 may be used to execute the processes S304 and S704 in FIG. 3 or FIG. 7.
  • the device 90 for determining the scheduling priority may further include at least one storage module 902 for storing program instructions and/or data.
  • the storage module 902 and the processing module 901 are coupled.
  • the coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units, or modules, and may be in electrical, mechanical or other forms, and is used for information exchange between devices, units or modules.
  • the processing module 901 may cooperate with the storage module 902.
  • the processing module 901 may execute program instructions stored in the storage module 902. At least one of the at least one storage module may be included in the processing module.
  • the apparatus 90 for determining the scheduling priority may further include a communication module 903 for communicating with other devices through the transmission medium, so that the apparatus in the apparatus 90 for determining the scheduling priority can communicate with other devices.
  • the other device may be a terminal.
  • the communication module 903 is used for the device to communicate with other devices.
  • the processing module 901 uses the communication module 903 to execute the processes S303 and S703 in FIG. 3 or FIG. 7.
  • the apparatus 90 for determining scheduling priority involved in FIG. 9 of the embodiment of the present application may be the communication device 20 shown in FIG. 2.
  • the apparatus 80 for determining scheduling priority or the apparatus 90 for determining scheduling priority provided by the embodiments of the present application can be used to implement the functions of the access network equipment in the methods implemented by the various embodiments of the present application.
  • the apparatus 80 for determining scheduling priority or the apparatus 90 for determining scheduling priority can be used to implement the functions of the access network equipment in the methods implemented by the various embodiments of the present application.
  • only The parts related to the embodiments of the present application are shown. For specific technical details that are not disclosed, please refer to the various embodiments of the present application.
  • the apparatus 100 for determining scheduling priority is used to implement the function of the terminal in the foregoing method.
  • the device 100 for determining the scheduling priority may be a terminal, or a device in the terminal, or a device that can be matched and used with the terminal.
  • the apparatus 100 for determining the scheduling priority may be a chip system.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the apparatus 100 for determining the scheduling priority may include: an obtaining module 1001 and a sending module 1002.
  • the obtaining module 1001 is used to execute the process S301 in FIG. 3; the sending module 1002 is used to execute the process S302 in FIG. 3.
  • all relevant content of each step involved in the above method embodiment can be cited in the function description of the corresponding function module, and will not be repeated here.
  • another device 110 for determining scheduling priority provided in an embodiment of this application is used to implement the function of the terminal in the foregoing method.
  • the device 110 for determining the scheduling priority may be a terminal, a device in the terminal, or a device that can be matched and used with the terminal.
  • the device 110 for determining the scheduling priority may be a chip system.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the apparatus 110 for determining the scheduling priority may include: a monitoring module 1101, a sending module 1102.
  • the monitoring module 1101 is used to perform the process S701 in FIG. 7; the sending module 1102 is used to perform the process S702 in FIG. 7.
  • all relevant content of each step involved in the above method embodiment can be cited in the function description of the corresponding function module, and will not be repeated here.
  • an apparatus 120 for determining a scheduling priority is used to implement the function of the terminal in the foregoing method.
  • the device 120 for determining the scheduling priority may be a terminal, a device in the terminal, or a device that can be matched and used with the terminal.
  • the device 120 for determining the scheduling priority may be a chip system.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the apparatus 120 for determining the scheduling priority includes at least one processing module 1201, configured to implement the function of the terminal in the method provided in the embodiment of the present application.
  • the processing module 1201 may be used to execute the processes S301 and S701 in FIG. 3 or FIG. 7.
  • the processing module 1201 may be used to execute the processes S301 and S701 in FIG. 3 or FIG. 7.
  • the device 120 for determining the scheduling priority may further include at least one storage module 1202 for storing program instructions and/or data.
  • the storage module 1202 and the processing module 1201 are coupled.
  • the coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units, or modules, and may be in electrical, mechanical or other forms, and is used for information exchange between devices, units or modules.
  • the processing module 1201 may cooperate with the storage module 1202.
  • the processing module 1201 may execute program instructions stored in the storage module 1202. At least one of the at least one storage module may be included in the processing module.
  • the apparatus 120 for determining the scheduling priority may further include a communication module 1203 for communicating with other devices through a transmission medium, so that the apparatus in the apparatus 120 for determining the scheduling priority can communicate with other devices.
  • the other device may be a terminal.
  • the communication module 1203 is used for the device to communicate with other devices.
  • the processing module 1201 uses the communication module 1203 to execute the processes S302 and S702 in FIG. 3 or FIG. 7.
  • the processing module 1201 is a processor
  • the storage module 1202 is a memory
  • the communication module 1203 is a communication interface
  • the apparatus 120 for determining scheduling priority involved in FIG. 12 in the embodiment of the present application may be the communication device 20 shown in FIG. 2.
  • the apparatus 100 for determining scheduling priority or the apparatus 110 for determining scheduling priority or the apparatus 120 for determining scheduling priority can be used to implement the functions of the terminal in the methods implemented in the foregoing embodiments of the present application.
  • the parts related to the embodiments of the present application are shown.
  • an embodiment of the present application provides a communication system, which includes a first communication device and a second communication device.
  • the first communication device can implement the function of an access network device
  • the second communication device can implement The function of the terminal.
  • the first communication device is an access network device
  • the second communication device is a terminal.
  • a computer-readable storage medium is provided, and an instruction is stored thereon, and the method in the foregoing method embodiment is executed when the instruction is executed.
  • a computer program product containing instructions is provided, and when the instructions are executed, the method in the foregoing method embodiment is executed.
  • the embodiment of the present application further provides a chip system.
  • the chip system includes a processor for implementing the technical method in the embodiment of the present invention.
  • the chip system further includes a memory for storing necessary program instructions and/or data of the communication device in the embodiment of the present invention.
  • the chip system further includes a memory for the processor to call application program codes stored in the memory.
  • the chip system may be composed of one or more chips, and may also include chips and other discrete devices, which are not specifically limited in the embodiment of the present application.
  • the steps of the method or algorithm described in conjunction with the disclosure of this application can be implemented in a hardware manner, or implemented in a manner in which a processor executes software instructions.
  • Software instructions can be composed of corresponding software modules, which can be stored in RAM, flash memory, ROM, erasable programmable read-only memory (erasable programmable ROM, EPROM), electrically erasable programmable read-only memory (electrically erasable programmable read-only memory, EPROM, EEPROM), registers, hard disk, mobile hard disk, CD-ROM or any other form of storage medium known in the art.
  • An exemplary storage medium is coupled to the processor, so that the processor can read information from the storage medium and can write information to the storage medium.
  • the storage medium may also be an integral part of the processor.
  • the processor and the storage medium may be located in the ASIC.
  • the ASIC may be located in the core network interface device.
  • the processor and the storage medium may also exist as discrete components in the core network interface device.
  • the memory may be coupled with the processor.
  • the memory may exist independently and be connected to the processor through a bus.
  • the memory can also be integrated with the processor.
  • the memory may be used to store application program codes for executing the technical solutions provided in the embodiments of the present application, and the processor controls the execution.
  • the processor is used to execute the application program code stored in the memory, so as to implement the technical solutions provided in the embodiments of the present application.
  • the functions described in this application can be implemented by hardware, software, firmware or any combination thereof. When implemented by software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or codes on the computer-readable medium.
  • the computer-readable medium includes a computer storage medium and a communication medium, where the communication medium includes any medium that facilitates the transfer of a computer program from one place to another.
  • the storage medium may be any available medium that can be accessed by a general-purpose or special-purpose computer.
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may be separately physically included, or two or more units may be integrated into one unit.
  • the above-mentioned integrated unit may be implemented in the form of hardware, or may be implemented in the form of hardware plus software functional units.
  • the above-mentioned integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium.
  • the above-mentioned software functional unit is stored in a storage medium and includes several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute some steps of the method described in each embodiment of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disk or optical disk and other media that can store program code .

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Abstract

本申请实施例提供一种确定调度优先级的方法及装置，涉及通信技术领域，以在视频传输中兼顾更低的丢包率及更低的传输时延。该方法包括：接入网设备接收终端在被调度时发送的调度参考信息，该调度参考信息为终端的传输队列中下一个待传输数据包的缓冲区状态信息和/或对应视频帧的被参考次数；接入网设备按照优先级算法及调度参考信息，确定该终端的调度优先级。

Description

一种确定调度优先级的方法及装置
本申请要求于2019年04月28日提交国家知识产权局、申请号为201910359925.8、发明名称为“一种确定调度优先级的方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请实施例涉及通信技术领域，尤其涉及一种确定调度优先级的方法及装置。
背景技术
随着计算机网络以及图像处理技术的飞速发展，视频监控已经广泛地应用于各种场景，例如交通分析、医疗健康、公共安全、野生动物跟踪和环境监测等。视频监控是将采集的视频数据传输后进行监控的技术，分为有线视频监控系统和无线视频监控系统两类。
无线视频监控系统具有成本低廉、应用范围广、扩展性好、移动性高等特点，应用更为广泛。但由于无线信道带宽资源有限、传输能力随时间波动等因素，无线视频传输系统的传输时延会明显增加。而在很多视频传输场景中，用户对传输时延具有一定的需求，时延过高会给用户带来非常不好的体验。
当前，第五代移动通信技术(the fifth generation，5G)的空口协议栈包括用户面协议和控制面协议，用户面协议栈由分组数据汇聚协议(packet data convergence protocol，PDCP)层、无线链路控制(radio link control，RLC)层、媒体访问控制(media access control address，MAC)层和物理层组成。在进行数据传输时，数据首先到达PDCP层，该层会对PDCP PDU进行加密，然后添加PDCP包头后送至RLC层。PDCP PDU到达RLC层后会被放入缓存中等待发送。当RLC层收到MAC层的传输指示后，会从缓存中取出对应大小的数据发至MAC层，MAC层会将此数据组成传输块并进行发送。
为了保证无线视频传输的实时性，可以采用PDCP层定时机制，PDCP层检查队列中的PDCP PDU是否超时，将超时的PDCP PDU丢弃，提升了视频传输时延体验。但是，当PDCP丢包率过高时，会造成接收端的视频质量严重下降。因此，视频传输中获取更低的丢包率以及更低的传输时延亟待解决。
发明内容
本申请实施例提供一种确定调度优先级的方法及装置，以在视频传输中兼顾更低的丢包率及更低的传输时延。
为达到上述目的，本申请的实施例采用如下技术方案：
第一方面，提供一种确定调度优先级的方法，包括：接入网设备接收终端在被调度时发送的调度参考信息，该调度参考信息为终端的传输队列中下一个待传输数据包的缓冲区状态信息和/或对应视频帧的被参考次数；接入网设备按照优先级算法及调度参考信息，确定该终端的调度优先级。
通过本申请提供的确定调度优先级的方法，结合终端被调度时传输队列中下一个待传输数据包的缓冲区状态信息和/或对应视频帧的被参考次数确定调度优先级。一方 面，由于缓冲区状态实时变化，因此终端被调度时数据包的缓冲区状态最准确，使确定的调度优先级更符合下一个待传输数据包的缓冲区状态，在PDCP层定时机制保证低传输时延的前提下避免了PDCP层定时机制导致的高丢包率。另一方面，由于视频传输帧间参考机制，一旦被参考的视频帧的数据包被丢弃，后续参考此帧的其他帧由于无法解码也将认为全部丢失，因此结合视频帧的被参考次数确定调度优先级，在PDCP层定时机制保证低传输时延的前提下避免了PDCP层定时机制导致的被参考次数高的视频帧中的数据包被丢弃而导致的高丢包率。
结合第一方面，在一种可能的实现方式中，缓冲区状态信息可以包括下述信息中至少一项：在传输队列中的驻留时延、数据包大小。通过数据包在传输队列中的驻留时延和/或数据包大小，来确定终端的调度优先级，以便于为终端确定的调度优先级与下一个待传输数据包在传输队列中的驻留时延和/或数据包大小强相关，进而为驻留时延长和/或数据量大的数据包所属终端配置更高的优先级，避免下一个待传输数据包由于PDCP层定时机制被丢弃。
结合第一方面或上述任一种可能的实现方式，在另一种可能的实现方式中，当调度参考信息为在传输队列中的驻留时延，接入网设备按照优先级算法及该调度参考信息，确定终端的调度优先级，具体可以实现为：接入网设备根据驻留时延获取该终端的队列首包时延，将终端的队列首包时延代入优先级算法，确定终端的调度优先级。在该实现方式中，根据驻留时延确定队列首包时延后确定调度优先级，在上行首包时延无法实时获取的场景下，实现了获取队列首包时延进而确定调度优先级。
例如，在上行传输系统中，新无线(new radio，NR)协议框架下接入网设备无法实时获取各用户精确的队列首包时延。
结合第一方面或上述任一种可能的实现方式，在另一种可能的实现方式中，提供一种优先级算法的具体实现，优先级算法可以实现为：调度参考信息数值大的终端的调度优先级高。对于调度参考信息数值大的终端的传输队列中下一个待传输数据包，其被丢弃的概率大大降低。需要说明的是，对于优先级算法的具体内容，可以根据实际需求配置，本申请对此不进行具体限定。
结合第一方面或上述任一种可能的实现方式，在另一种可能的实现方式中，本申请提供一种优先级算法的具体实现，优先级算法可以实现为：设置与调度参考信息相关的因子，该因子与调度参考信息为增函数关系。通过增函数关系以实现调度参考信息数值大的终端的调度优先级高的目的，进而实现降低调度参考信息数值大的终端的传输队列中下一个待传输数据包被丢弃的概率。
结合第一方面或上述任一种可能的实现方式，在另一种可能的实现方式中，接入网设备根据驻留时延获取终端的队列首包时延，具体可以实现为：若驻留时延τ1不为0，终端的队列首包时延τ＝τ1+T3-T1；若τ1为0，τ＝T3-T2。其中，T1为接入网设备最后一次收到该终端发送的驻留时延的时刻；T2为在T1之后接入网设备接收到该终端的用户请求的时刻；T3为当前时刻。
结合第一方面或上述任一种可能的实现方式，在另一种可能的实现方式中，接入网设备接收终端在被调度时发送的调度参考信息，具体可以实现为：接入网设备接收终端在被调度时，发送的数据包，数据包包头的控制信息中携带调度参考信息。
结合第一方面或上述任一种可能的实现方式，在另一种可能的实现方式中，接入网设备接收终端在被调度时发送的调度参考信息，具体可以实现为：接入网设备接收终端在被调度时发送的携带该调度参考信息的PDCP协议数据单元(protocol data unit，PDU)。在该实现方式中，采用已有的PDCP层包头控制信息携带调度参考信息，节约资源。
结合第一方面或上述任一种可能的实现方式，在另一种可能的实现方式中，接入网设备接收终端在被调度时发送的调度参考信息，具体可以实现为：接入网设备接收终端在被调度时发送的携带调度参考信息的MAC控制单元CE。在该实现方式中，采用已有的MAC层包头控制信息携带调度参考信息，节约资源。
结合第一方面或上述任一种可能的实现方式，在另一种可能的实现方式中，接入网设备接收终端在被调度时发送的调度参考信息，具体可以实现为：接入网设备接收终端在被调度时发送的携带调度参考信息的控制信息。其中，该控制信息在控制信道传输。在该实现方式中，通过新定义控制信息用于发送调度参考信息，避免修改数据包包头内的控制信息，实现简单。
结合第一方面或上述任一种可能的实现方式，在另一种可能的实现方式中，上述下一个待传输数据包，可以包括：除当前要传输的数据包以外的第一个待传输包，或者，队列首包。
例如，若调度参考信息是终端在被调度时采用各层包头的控制信息上报，则下一个待传输包是指除当前要传输的包以外的第一个待传输包；若调度参考信息是通过新定义的控制信息上报，则下一个待传输包是队列首包。
第二方面，提供另一种确定调度优先级的方法，该方法可以包括：终端获取调度参考信息，该调度参考信息为该终端的传输队列中下一个待传输数据包的缓冲区状态信息和/或对应视频帧的被参考次数；终端在被调度时，向接入网设备发送该调度参考信息，该调度参考信息用于接入网设备确定该终端的调度优先级。
通过本申请提供的确定调度优先级的方法，结合终端被调度时传输队列中下一个待传输数据包的缓冲区状态信息和/或对应视频帧的被参考次数确定调度优先级。一方面，由于缓冲区状态实时变化，因此终端被调度时数据包的缓冲区状态最准确，使确定的调度优先级更符合下一个待传输数据包的缓冲区状态，在PDCP层定时机制保证低传输时延的前提下避免了PDCP层定时机制导致的高丢包率。另一方面，由于视频传输帧间参考机制，一旦被参考的视频帧的数据包被丢弃，后续参考此帧的其他帧由于无法解码也将认为全部丢失，因此结合视频帧的被参考次数确定调度优先级，在PDCP层定时机制保证低传输时延的前提下避免了PDCP层定时机制导致的被参考次数高的视频帧中的数据包被丢弃而导致的高丢包率。
需要说明的是，第二方面提供的确定调度优先级的方法，与上述第一方面提供的确定调度优先级的方法属于同一方法，只是上述第一方面从接入网设备角度描述，第二方面从终端角度描述，因此，第二方面的具体实现可以参考上述第一方面的具体实现。
结合第二方面，在一种可能的实现方式中，终端在被调度时向接入网设备发送调度参考信息，具体可以实现为：终端在被调度时，在数据包包头的控制信息中携带调 度参考信息，向接入网设备发送该数据包。
结合第二方面或上述任一种可能的实现方式，在另一种可能的实现方式中，终端向接入网设备发送调度参考信息，具体可以实现为：终端向接入网设备发送携带调度参考信息的PDCP PDU。在该实现方式中，采用已有的PDCP层包头控制信息携带调度参考信息，节约资源。
结合第二方面或上述任一种可能的实现方式，在另一种可能的实现方式中，终端向接入网设备发送调度参考信息，具体可以实现为：终端向接入网设备发送携带调度参考信息的MAC CE。采用已有的MAC层包头控制信息携带调度参考信息，节约资源。
结合第二方面或上述任一种可能的实现方式，在另一种可能的实现方式中，终端向接入网设备发送调度参考信息，具体可以实现为：终端向接入网设备发送携带调度参考信息的控制信息。其中，该控制信息在控制信道传输。在该实现方式中，通过新定义控制信息用于发送调度参考信息，避免修改数据包包头内的控制信息，实现简单。
第三方面，提供又一种确定调度优先级的方法，该方法可以包括：接入网设备接收终端在调度参考信息发生变化时发送的最新的调度参考信息，该最新的调度参考信息为终端的传输队列中首个待传输数据包对应的视频帧最新的被参考次数；接入网设备按照优先级算法及最新的调度参考信息，确定该终端的调度优先级。
通过本申请提供的确定调度优先级的方法，结合终端传输队列中首个待传输数据包对应视频帧的最新被参考次数确定调度优先级。由于视频传输帧间参考机制，一旦被参考的视频帧的数据包被丢弃，后续参考此帧的其他帧由于无法解码也将认为全部丢失，因此结合视频帧的最新被参考次数确定调度优先级，在PDCP层定时机制保证低传输时延的前提下避免了PDCP层定时机制导致的被参考次数高的视频帧中的数据包被丢弃而导致的高丢包率。另外，视频帧的被参考次数变化的概率很小，本申请在调度参考信息发生变化时发送的最新的调度参考信息，降低了系统开销。
需要说明的是，第三方面提供的确定调度优先级的方法，与上述第一方面提供的确定调度优先级的方法的差别是：终端发送调度参考信息的时机不同，以及调度参考信息的内容不同，其他具体实现均与第一方面及其实现方式相似，因此，第三方面的具体实现可以参考上述第一方面或任一种可能的实现方式。
结合第三方面，在一种可能的实现方式中，提供一种优先级算法的具体实现，优先级算法可以实现为：调度参考信息数值大的终端的调度优先级高。对于调度参考信息数值大的终端的传输队列中下一个待传输数据包，其被丢弃的概率大大降低。需要说明的是，对于优先级算法的具体内容，可以根据实际需求配置，本申请对此不进行具体限定。
结合第三方面或上述任一种可能的实现方式，在另一种可能的实现方式中，本申请提供一种优先级算法的具体实现，优先级算法可以实现为：设置与调度参考信息相关的因子，该因子与调度参考信息为增函数关系。通过增函数关系以实现调度参考信息数值大的终端的调度优先级高的目的，进而实现降低调度参考信息数值大的终端的传输队列中下一个待传输数据包被丢弃的概率。
结合第三方面或上述任一种可能的实现方式，在另一种可能的实现方式中，接入 网设备接收终端在被调度时发送的调度参考信息，具体可以实现为：接入网设备接收终端在被调度时，发送的数据包，数据包包头的控制信息中携带调度参考信息。在该实现方式中，采用已有的数据包包头的控制信息携带调度参考信息，节约资源。
例如，可以在PDCP PDU或者MAC CE中携带调度参考信息。
结合第三方面或上述任一种可能的实现方式，在另一种可能的实现方式中，接入网设备接收终端在被调度时发送的调度参考信息，具体可以实现为：接入网设备接收终端在被调度时发送的携带调度参考信息的控制信息。其中，该控制信息在控制信道传输。在该实现方式中，通过新定义控制信息用于发送调度参考信息，避免修改数据包包头内的控制信息，实现简单。
第四方面，提供再一种确定调度优先级的方法，该方法可以包括：终端监测调度参考信息，该调度参考信息为该终端的传输队列中首个待传输数据包对应视频帧的被参考次数；在该调度参考信息发生变化时，终端向接入网设备发送最新的调度参考信息，最新的调度参考信息用于接入网设备确定终端的调度优先级。
通过本申请提供的确定调度优先级的方法，结合终端传输队列中首个待传输数据包对应视频帧的最新被参考次数确定调度优先级。由于视频传输帧间参考机制，一旦被参考的视频帧的数据包被丢弃，后续参考此帧的其他帧由于无法解码也将认为全部丢失，因此结合视频帧的最新被参考次数确定调度优先级，在PDCP层定时机制保证低传输时延的前提下避免了PDCP层定时机制导致的被参考次数高的视频帧中的数据包被丢弃而导致的高丢包率。另外，视频帧的被参考次数变化的概率很小，本申请在调度参考信息发生变化时发送的最新的调度参考信息，降低了系统开销。
需要说明的是，第四方面提供的确定调度优先级的方法，与上述第三方面提供的确定调度优先级的方法属于同一方法，只是上述第三方面从接入网设备角度描述，第四方面从终端角度描述，因此，第四方面的具体实现可以参考上述第三方面的具体实现。
结合第四方面，在一种可能的实现方式中，终端在被调度时向接入网设备发送调度参考信息，具体可以实现为：终端在被调度时，在数据包包头的控制信息中携带调度参考信息，向接入网设备发送该数据包。
结合第四方面或上述任一种可能的实现方式，在另一种可能的实现方式中，终端向接入网设备发送调度参考信息，具体可以实现为：终端向接入网设备发送携带调度参考信息的PDCP PDU。在该实现方式中，采用已有的PDCP层包头控制信息携带调度参考信息，节约资源。
结合第四方面或上述任一种可能的实现方式，在另一种可能的实现方式中，终端向接入网设备发送调度参考信息，具体可以实现为：终端向接入网设备发送携带调度参考信息的MAC CE。采用已有的MAC层包头控制信息携带调度参考信息，节约资源。
结合第四方面或上述任一种可能的实现方式，在另一种可能的实现方式中，终端向接入网设备发送调度参考信息，具体可以实现为：终端向接入网设备发送携带调度参考信息的控制信息。其中，该控制信息在控制信道传输。在该实现方式中，通过新定义控制信息用于发送调度参考信息，避免修改数据包包头内的控制信息，实现简单。
第五方面，提供一种确定调度优先级的装置，该装置可以是接入网设备，也可以是接入网设备中的装置，或者是能够和接入网设备匹配使用的装置。一种设计中，该装置可以包括执行第一方面中所描述的方法/操作/步骤/动作所一一对应的模块，该模块可以是硬件电路，也可是软件，也可以是硬件电路结合软件实现。一种设计中，该装置可以包括接收模块和确定模块。示例性地：
接收模块，用于接收终端在被调度时发送的调度参考信息，该调度参考信息为终端的传输队列中下一个待传输数据包的缓冲区状态信息和/或对应视频帧的被参考次数。
确定模块，用于按照优先级算法及接收模块接收的调度参考信息，确定该终端的调度优先级。
通过本申请提供的确定调度优先级的装置，结合终端被调度时传输队列中下一个待传输数据包的缓冲区状态信息和/或对应视频帧的被参考次数确定调度优先级。一方面，由于缓冲区状态实时变化，因此终端被调度时数据包的缓冲区状态最准确，使确定的调度优先级更符合下一个待传输数据包的缓冲区状态，在PDCP层定时机制保证低传输时延的前提下避免了PDCP层定时机制导致的高丢包率。另一方面，由于视频传输帧间参考机制，一旦被参考的视频帧的数据包被丢弃，后续参考此帧的其他帧由于无法解码也将认为全部丢失，因此结合视频帧的被参考次数确定调度优先级，在PDCP层定时机制保证低传输时延的前提下避免了PDCP层定时机制导致的被参考次数高的视频帧中的数据包被丢弃而导致的高丢包率。
需要说明的是，第五方面提供的确定调度优先级的装置，用于执行上述第一方面提供的确定调度优先级的方法，具体实现可以参考上述第一方面的具体实现。
结合第五方面，在一种可能的实现方式中，缓冲区状态信息可以包括下述信息中至少一项：在传输队列中的驻留时延、数据包大小。通过数据包在传输队列中的驻留时延和/或数据包大小，来确定终端的调度优先级，以便于为终端确定的调度优先级与下一个待传输数据包在传输队列中的驻留时延和/或数据包大小强相关，进而为驻留时延长和/或数据量大的数据包所属终端配置更高的优先级，避免下一个待传输数据包由于PDCP层定时机制被丢弃。
结合第五方面或上述任一种可能的实现方式，在另一种可能的实现方式中，当调度参考信息为在传输队列中的驻留时延，确定模块具体可以用于：根据驻留时延获取该终端的队列首包时延，将终端的队列首包时延代入优先级算法，确定终端的调度优先级。在该实现方式中，根据驻留时延确定队列首包时延后确定调度优先级，在上行首包时延无法实时获取的场景下，实现了获取队列首包时延进而确定调度优先级。
结合第五方面或上述任一种可能的实现方式，在另一种可能的实现方式中，提供一种优先级算法的具体实现，优先级算法可以实现为：调度参考信息数值大的终端的调度优先级高。对于调度参考信息数值大的终端的传输队列中下一个待传输数据包，其被丢弃的概率大大降低。需要说明的是，对于优先级算法的具体内容，可以根据实际需求配置，本申请对此不进行具体限定。
结合第五方面或上述任一种可能的实现方式，在另一种可能的实现方式中，本申请提供一种优先级算法的具体实现，优先级算法可以实现为：设置与调度参考信息相 关的因子，该因子与调度参考信息为增函数关系。通过增函数关系以实现调度参考信息数值大的终端的调度优先级高的目的，进而实现降低调度参考信息数值大的终端的传输队列中下一个待传输数据包被丢弃的概率。
结合第五方面或上述任一种可能的实现方式，在另一种可能的实现方式中，确定模块根据驻留时延获取终端的队列首包时延，具体可以实现为：若驻留时延τ1不为0，终端的队列首包时延τ＝τ1+T3-T1；若τ1为0，τ＝T3-T2。其中，T1为最后一次收到该终端发送的驻留时延的时刻；T2为在T1之后接收到该终端的用户请求的时刻；T3为当前时刻。
结合第五方面或上述任一种可能的实现方式，在另一种可能的实现方式中，接收模块具体可以用于：接收终端在被调度时发送的数据包，该数据包包头的控制信息中携带调度参考信息。
结合第五方面或上述任一种可能的实现方式，在另一种可能的实现方式中，接收模块具体可以用于：接收终端在被调度时发送的携带该调度参考信息的PDCP PDU。在该实现方式中，采用已有的PDCP层包头控制信息携带调度参考信息，节约资源。
结合第五方面或上述任一种可能的实现方式，在另一种可能的实现方式中，接收模块具体可以用于：接收终端在被调度时发送的携带调度参考信息的MAC CE。在该实现方式中，采用已有的MAC层包头控制信息携带调度参考信息，节约资源。
结合第五方面或上述任一种可能的实现方式，在另一种可能的实现方式中，接收模块具体可以用于：收终端在被调度时发送的携带调度参考信息的控制信息。其中，该控制信息在控制信道传输。在该实现方式中，通过新定义控制信息用于发送调度参考信息，避免修改数据包包头内的控制信息，实现简单。
结合第五方面或上述任一种可能的实现方式，在另一种可能的实现方式中，上述下一个待传输数据包，可以包括：除当前要传输的数据包以外的第一个待传输包，或者，队列首包。
第六方面，提供一种确定调度优先级的装置，该装置可以是终端，也可以是终端中的装置，或者是能够和终端匹配使用的装置。一种设计中，该装置可以包括执行第二方面中所描述的方法/操作/步骤/动作所一一对应的模块，该模块可以是硬件电路，也可是软件，也可以是硬件电路结合软件实现。一种设计中，该装置可以包括获取模块和发送模块。示例性地：
获取模块，用于获取调度参考信息，该调度参考信息为终端的传输队列中下一个待传输数据包的缓冲区状态信息和/或对应视频帧的被参考次数。
发送模块，用于在该装置被调度时，向接入网设备发送获取单元获取的调度参考信息，该调度参考信息用于接入网设备确定该装置的调度优先级。
通过本申请提供的确定调度优先级的装置，结合被调度时传输队列中下一个待传输数据包的缓冲区状态信息和/或对应视频帧的被参考次数确定调度优先级。一方面，由于缓冲区状态实时变化，因此被调度时数据包的缓冲区状态最准确，使确定的调度优先级更符合下一个待传输数据包的缓冲区状态，在PDCP层定时机制保证低传输时延的前提下避免了PDCP层定时机制导致的高丢包率。另一方面，由于视频传输帧间参考机制，一旦被参考的视频帧的数据包被丢弃，后续参考此帧的其他帧由于无法解 码也将认为全部丢失，因此结合视频帧的被参考次数确定调度优先级，在PDCP层定时机制保证低传输时延的前提下避免了PDCP层定时机制导致的被参考次数高的视频帧中的数据包被丢弃而导致的高丢包率。
需要说明的是，第六方面提供的确定调度优先级的装置，用于执行上述第二方面提供的确定调度优先级的方法，具体实现可以参考上述第二方面的具体实现。
结合第六方面，在一种可能的实现方式中，发送模块具体用于：在被调度时，在数据包包头的控制信息中携带调度参考信息，向接入网设备发送该数据包。
结合第六方面或上述任一种可能的实现方式，在另一种可能的实现方式中，发送模块具体用于：向接入网设备发送携带调度参考信息的PDCP PDU。在该实现方式中，采用已有的PDCP层包头控制信息携带调度参考信息，节约资源。
结合第六方面或上述任一种可能的实现方式，在另一种可能的实现方式中，发送模块具体用于：向接入网设备发送携带调度参考信息的MAC CE。采用已有的MAC层包头控制信息携带调度参考信息，节约资源。
结合第六方面或上述任一种可能的实现方式，在另一种可能的实现方式中，发送模块具体用于：向接入网设备发送携带调度参考信息的控制信息。其中，该控制信息在控制信道传输。在该实现方式中，通过新定义控制信息用于发送调度参考信息，避免修改数据包包头内的控制信息，实现简单。
第七方面，提供一种确定调度优先级的装置，该装置可以是接入网设备，也可以是接入网设备中的装置，或者是能够和接入网设备匹配使用的装置。一种设计中，该装置可以包括执行第一方面中所描述的方法/操作/步骤/动作所一一对应的模块，该模块可以是硬件电路，也可是软件，也可以是硬件电路结合软件实现。一种设计中，该装置可以包括接收模块和确定模块。示例性地：
接收模块，用于接收终端在调度参考信息发生变化时发送的最新的调度参考信息，该最新的调度参考信息为终端的传输队列中首个待传输数据包对应的视频帧最新的被参考次数。
确定模块，用于按照优先级算法及接收模块接收的最新的调度参考信息，确定该终端的调度优先级。
通过本申请提供的确定调度优先级的装置，结合终端传输队列中首个待传输数据包对应视频帧的最新被参考次数确定调度优先级。由于视频传输帧间参考机制，一旦被参考的视频帧的数据包被丢弃，后续参考此帧的其他帧由于无法解码也将认为全部丢失，因此结合视频帧的最新被参考次数确定调度优先级，在PDCP层定时机制保证低传输时延的前提下避免了PDCP层定时机制导致的被参考次数高的视频帧中的数据包被丢弃而导致的高丢包率。另外，视频帧的被参考次数变化的概率很小，本申请在调度参考信息发生变化时发送的最新的调度参考信息，降低了系统开销。
需要说明的是，第七方面提供的确定调度优先级的装置，用于执行上述第三方面提供的确定调度优先级的方法，具体实现可以参考上述第三方面的具体实现。
结合第七方面，在一种可能的实现方式中，提供一种优先级算法的具体实现，优先级算法可以实现为：调度参考信息数值大的终端的调度优先级高。对于调度参考信息数值大的终端的传输队列中下一个待传输数据包，其被丢弃的概率大大降低。需要 说明的是，对于优先级算法的具体内容，可以根据实际需求配置，本申请对此不进行具体限定。
结合第七方面或上述任一种可能的实现方式，在另一种可能的实现方式中，本申请提供一种优先级算法的具体实现，优先级算法可以实现为：设置与调度参考信息相关的因子，该因子与调度参考信息为增函数关系。通过增函数关系以实现调度参考信息数值大的终端的调度优先级高的目的，进而实现降低调度参考信息数值大的终端的传输队列中下一个待传输数据包被丢弃的概率。
结合第七方面或上述任一种可能的实现方式，在另一种可能的实现方式中，接收模块具体用于：接收终端在被调度时发送的数据包，数据包包头的控制信息中携带调度参考信息。在该实现方式中，采用已有的数据包包头的控制信息携带调度参考信息，节约资源。
例如，可以在PDCP PDU或者MAC CE中携带调度参考信息。
结合第七方面或上述任一种可能的实现方式，在另一种可能的实现方式中，接收模块具体用于：接收终端在被调度时发送的携带调度参考信息的控制信息。其中，该控制信息在控制信道传输。在该实现方式中，通过新定义控制信息用于发送调度参考信息，避免修改数据包包头内的控制信息，实现简单。
第八方面，提供一种确定调度优先级的装置，该装置可以是终端，也可以是终端中的装置，或者是能够和终端匹配使用的装置。一种设计中，该装置可以包括执行第二方面中所描述的方法/操作/步骤/动作所一一对应的模块，该模块可以是硬件电路，也可是软件，也可以是硬件电路结合软件实现。一种设计中，该装置可以包括监测模块和发送模块。示例性地：
监测模块，用于监测调度参考信息，该调度参考信息为该装置的传输队列中首个待传输数据包对应视频帧的被参考次数。
发送模块，用于在该调度参考信息发生变化时，向接入网设备发送最新的调度参考信息，最新的调度参考信息用于接入网设备确定终端的调度优先级。
通过本申请提供的确定调度优先级的装置，结合传输队列中首个待传输数据包对应视频帧的最新被参考次数确定调度优先级。由于视频传输帧间参考机制，一旦被参考的视频帧的数据包被丢弃，后续参考此帧的其他帧由于无法解码也将认为全部丢失，因此结合视频帧的最新被参考次数确定调度优先级，在PDCP层定时机制保证低传输时延的前提下避免了PDCP层定时机制导致的被参考次数高的视频帧中的数据包被丢弃而导致的高丢包率。另外，视频帧的被参考次数变化的概率很小，本申请在调度参考信息发生变化时发送的最新的调度参考信息，降低了系统开销。
需要说明的是，第八方面提供的确定调度优先级的装置，用于执行上述第四方面提供的确定调度优先级的方法，具体实现可以参考上述第四方面的具体实现。
结合第八方面，在一种可能的实现方式中，发送模块具体用于：在被调度时，在数据包包头的控制信息中携带调度参考信息，向接入网设备发送该数据包。
结合第八方面或上述任一种可能的实现方式，在另一种可能的实现方式中，发送模块具体用于：向接入网设备发送携带调度参考信息的PDCP PDU。在该实现方式中，采用已有的PDCP层包头控制信息携带调度参考信息，节约资源。
结合第八方面或上述任一种可能的实现方式，在另一种可能的实现方式中，发送模块具体用于：向接入网设备发送携带调度参考信息的MAC CE。采用已有的MAC层包头控制信息携带调度参考信息，节约资源。
结合第八方面或上述任一种可能的实现方式，在另一种可能的实现方式中，发送模块具体用于：向接入网设备发送携带调度参考信息的控制信息。其中，该控制信息在控制信道传输。在该实现方式中，通过新定义控制信息用于发送调度参考信息，避免修改数据包包头内的控制信息，实现简单。
第九方面，本申请实施例提供再一种确定调度优先级的装置，所述装置包括处理器，用于实现上述第一方面描述的方法。所述装置还可以包括存储器，所述存储器与所述处理器耦合，所述处理器执行所述存储器中存储的指令时，可以实现上述第一方面描述的方法。所述装置还可以包括通信接口，所述通信接口用于该装置与其它设备进行通信，示例性的，通信接口可以是收发器、电路、总线、模块或其它类型的通信接口，其它设备可以为终端。在一种可能的实现中，该装置包括：
存储器，用于存储指令；
处理器，用于利用通信接口，接收终端在被调度时发送的调度参考信息，该调度参考信息为终端的传输队列中下一个待传输数据包的缓冲区状态信息和/或对应视频帧的被参考次数；按照优先级算法及调度参考信息，确定该终端的调度优先级。
需要说明的是，本申请中存储器中的指令可以预先存储也可以使用该装置时从互联网下载后存储，本申请对于存储器中指令的来源不进行具体限定。
本申请实施例中的耦合是装置、单元或模块之间的间接耦合或连接，其可以是电性，机械或其它的形式，用于装置、单元或模块之间的信息交互。
第十方面，本申请实施例提供再一种确定调度优先级的装置，所述装置包括处理器，用于实现上述第二方面描述的方法。所述装置还可以包括存储器，所述存储器与所述处理器耦合，所述处理器执行所述存储器中存储的指令时，可以实现上述第二方面描述的方法。所述装置还可以包括通信接口，所述通信接口用于该装置与其它设备进行通信，示例性的，通信接口可以是收发器、电路、总线、模块或其它类型的通信接口，其它设备可以为接入网设备。在一种可能的实现中，该装置包括：
存储器，用于存储指令；
处理器，获取调度参考信息，该调度参考信息为该终端的传输队列中下一个待传输数据包的缓冲区状态信息和/或对应视频帧的被参考次数；在被调度时，利用通信接口向接入网设备发送该调度参考信息，该调度参考信息用于接入网设备确定该终端的调度优先级。
第十一方面，本申请实施例提供再一种确定调度优先级的装置，所述装置包括处理器，用于实现上述第三方面描述的方法。所述装置还可以包括存储器，所述存储器与所述处理器耦合，所述处理器执行所述存储器中存储的指令时，可以实现上述第三方面描述的方法。所述装置还可以包括通信接口，所述通信接口用于该装置与其它设备进行通信，示例性的，通信接口可以是收发器、电路、总线、模块或其它类型的通信接口，其它设备可以为终端。在一种可能的实现中，该装置包括：
存储器，用于存储指令；
处理器，用于利用通信接口，接收终端在调度参考信息发生变化时发送的最新的调度参考信息，该最新的调度参考信息为终端的传输队列中首个待传输数据包对应的视频帧最新的被参考次数；按照优先级算法及最新的调度参考信息，确定该终端的调度优先级。
第十二方面，本申请实施例提供再一种确定调度优先级的装置，所述装置包括处理器，用于实现上述第四方面描述的方法。所述装置还可以包括存储器，所述存储器与所述处理器耦合，所述处理器执行所述存储器中存储的指令时，可以实现上述第四方面描述的方法。所述装置还可以包括通信接口，所述通信接口用于该装置与其它设备进行通信，示例性的，通信接口可以是收发器、电路、总线、模块或其它类型的通信接口，其它设备可以为接入网设备。在一种可能的实现中，该装置包括：
存储器，用于存储指令；
处理器，监测调度参考信息，该调度参考信息为该终端的传输队列中首个待传输数据包对应视频帧的被参考次数；在该调度参考信息发生变化时，利用通信接口向接入网设备发送最新的调度参考信息，最新的调度参考信息用于接入网设备确定终端的调度优先级。
第十三方面，本申请实施例中还提供一种计算机可读存储介质，包括指令，当其在计算机上运行时，使得计算机执行上述任一方面或任意一种可能的实现方式所述的确定调度优先级的方法。
第十四方面，本申请实施例提供了一种芯片系统，该芯片系统包括处理器，还可以包括存储器，用于实现上述方法中接入网设备的功能。该芯片系统可以由芯片构成，也可以包含芯片和其他分立器件。
第十五方面，本申请实施例提供了一种芯片系统，该芯片系统包括处理器，还可以包括存储器，用于实现上述方法中终端的功能。该芯片系统可以由芯片构成，也可以包含芯片和其他分立器件。
第十六方面，提供了一种通信系统，该通信系统中包括第一通信装置和第二通信装置，该第一通信装置可以实现第一方面的方法或第一方面的任一种可能的实现的方法，该第二通信装置可以实现第二方面的方法或第二方面的任一种可能的实现的方法。例如，第一通信装置为接入网设备，第二通信装置为终端。
第十七方面，提供了一种通信系统，该通信系统中包括第三通信装置和第四通信装置，该第三通信装置可以实现第三方面的方法或第三方面的任一种可能的实现的方法，该第四通信装置可以实现第四方面的方法或第四方面的任一种可能的实现的方法。例如，第三通信装置为接入网设备，第四通信装置为终端。
上述第九方面至第十七方面提供的方案，用于实现上述第一方面至第四方面提供的确定调度优先级的方法，因此可以与第一方面至第四方面达到相同的有益效果，此处不再进行赘述。
附图说明
图1为本申请方案应用的通信系统的架构示意图；
图2为本申请实施例提供的一种通信设备的结构示意图；
图3为本申请实施例提供的一种确定调度优先级的方法的流程示意图；
图4为本申请实施例提供的一种PDCP控制PDU的类型的结构示意图；
图5为本申请实施例提供的一种时延PDU的内部架构示意图；
图6为本申请实施例提供的一种MAC PDU的内部示意图；
图6a为本申请实施例提供的一种MAC PDU中的LCID域的内部架构示意图；
图7为本申请实施例提供的另一种确定调度优先级的方法的流程示意图；
图8为本申请实施例提供的一种确定调度优先级的装置的结构示意图；
图9为本申请实施例提供的另一种确定调度优先级的装置的结构示意图；
图10为本申请实施例提供的再一种确定调度优先级的装置的结构示意图；
图11为本申请实施例提供的又一种确定调度优先级的装置的结构示意图；
图12为本申请实施例提供的又一种确定调度优先级的装置的结构示意图。
具体实施方式
在本申请实施例中，为了便于清楚描述本申请实施例的技术方案，采用了“第一”、“第二”等字样对功能和作用基本相同的相同项或相似项进行区分。本领域技术人员可以理解“第一”、“第二”等字样并不对数量和执行次序进行限定，并且“第一”、“第二”等字样也并不限定一定不同。
在本申请实施例中，“示例性的”或者“例如”等词用于表示作例子、例证或说明。本申请实施例中被描述为“示例性的”或者“例如”的任何实施例或设计方案不应被解释为比其它实施例或设计方案更优选或更具优势。确切而言，使用“示例性的”或者“例如”等词旨在以具体方式呈现相关概念，便于理解。
在本申请的描述中，除非另有说明，“/”表示前后关联的对象是一种“或”的关系，例如，A/B可以表示A或B；本申请中的“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况，其中A,B可以是单数或者复数。并且，在本申请的描述中，除非另有说明，“多个”是指两个或多于两个。“以下至少一项(个)”或其类似表达，是指的这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a，b，或c中的至少一项(个)，可以表示：a，b，c，a-b，a-c，b-c，或a-b-c，其中a，b，c可以是单个，也可以是多个。
在本申请实施例中，至少一个还可以描述为一个或多个，多个可以是两个、三个、四个或者更多个，本申请不做限制。
在本申请实施例中，对于一种技术特征，通过“第一”、“第二”、“第三”、“A”、“B”、“C”和“D”等区分该种技术特征中的技术特征，该“第一”、“第二”、“第三”、“A”、“B”、“C”和“D”描述的技术特征间无先后顺序或者大小顺序。
此外，本申请实施例描述的网络架构以及业务场景是为了更加清楚的说明本申请实施例的技术方案，并不构成对于本申请实施例提供的技术方案的限定，本领域普通技术人员可知，随着网络架构的演变和新业务场景的出现，本申请实施例提供的技术方案对于类似的技术问题，同样适用。
在描述本申请的具体方案之前，此处先对无线视频传输的过程进行简单描述。
5G的空口协议栈包括用户面协议和控制面协议，用户面主要执行用户数据的传输， 控制面主要对控制信令进行操作。用户面协议栈由PDCP层、RLC层、MAC层和物理层组成。PDCP层对来自数据面的IP包进行处理，其功能包括头压缩和解压缩、加密解密、丢弃超时的用户面数据等。RLC层负责分段/串联和重组RLC服务数据单元(service data unit，SDU)，使其适合MAC层指定的大小。MAC层负责匹配逻辑信道和传输信道。物理层负责数据的比特流的传输。PDCP层、RLC层和MAC层有相应的PDU和SDU。PDU是发往下层的数据单元，SDU是从上层收到的数据单元。
为了保证无线视频传输的实时性，目前无线视频传输中采用了PDCP层定时机制。数据首先到达PDCP层，该层会对PDCP PDU进行加密，然后添加PDCP包头后送至RLC层。PDCP PDU到达RLC层后会被放入缓存中等待发送。当RLC层收到MAC层的传输指示后，会从缓存中取出对应大小的数据发至MAC层。MAC层会将此数据组成传输块并进行发送。为了保证视频通话的实时性，在PDCP层检查队列中的PDCP PDU是否超时。如果超时，就将对应的PDCP PDU丢弃。通过PDCP层的定时机制，丢弃超时的视频数据，以避免把资源浪费在已经超时的视频数据上，从而提升整体的视频传输时延体验。然而，当PDCP丢包率过高时，会造成接收端的视频质量严重下降。
根据H.264压缩标准，视频画面中包括I帧、P帧。其中，I帧又称帧内编码帧，是一种自带全部信息的独立帧，无需参考其他图像便可独立进行解码。P帧又称帧间预测编码帧，需要参考前面的I帧才能进行编码，表示的是当前帧画面与前一帧(前一帧可能是I帧也可能是P帧)的差别，P帧解码时需要用之前缓存的画面叠加上本帧定义的差别，生成最终画面。与I帧相比，P帧通常占用更少的数据位。由于I帧数据量远大于P帧，重要性高的I帧更容易因超时被丢弃。
针对采用了PDCP层定时机制的场景中的下行传输中，为了降低PDCP层丢包率，可以在调度时考虑时延因素，给队列首包时延高的用户设置更高的调度优先级，以获得更低的丢包率以及更低的传输时延。但是，由于视频传输的帧间参考机制，调度时只考虑了时延因素，未考虑每个数据包对应的视频帧的被参考次数，重要性高的I帧更容易因超时被丢弃，从而导致接收端丢帧率过高的问题。另外，考虑时延因素的调度算法需要知道用户队列首包时延，这一信息是实时变化的，且在上行传输系统中无法实时获得各用户精确的队列首包时延信息。
基于此，本申请提出一种确定调度优先级的方法，用于在视频传输中为用户确定调度优先级，兼顾更低的丢包率及更低的传输时延。其基本原理是：在确定调度优先级时结合待传输数据包的缓冲区状态和/或对应视频帧的被参考次数，使确定的调度优先级更符合与待传输数据包的缓冲区状态和/或对应视频帧的被参考次数相关，在PDCP层定时机制保证低传输时延的前提下避免了PDCP层定时机制导致的高丢包率。
需要说明的是，本申请实施例提供的方案可以应用于终端设备或者接入网设备，本申请对于执行本申请方案的设备类型不进行具体限定，后续内容不再进行一一说明。
本申请实施例涉及到的终端，可以是一种具有无线收发功能的设备，其可以部署在陆地上，包括室内或室外、手持或车载；也可以部署在水面上(如轮船等)；还可以部署在空中(例如飞机、气球和卫星上等)。终端可以是用户设备(user equipment，UE)，其中，UE包括具有无线通信功能的手持式设备、车载设备、可穿戴设备或计 算设备。示例性地，UE可以是手机(mobile phone)、平板电脑或带无线收发功能的电脑。终端设备还可以是虚拟现实(virtual reality，VR)终端设备、增强现实(augmented reality，AR)终端设备、工业控制中的无线终端、无人驾驶中的无线终端、远程医疗中的无线终端、智能电网中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端等等。本申请实施例中，用于实现终端的功能的装置可以是终端；也可以是能够支持终端实现该功能的装置，例如芯片系统，该装置可以被安装在终端中。本申请实施例中，芯片系统可以由芯片构成，也可以包括芯片和其他分立器件。本申请实施例提供的技术方案中，以用于实现终端的功能的装置是终端，以终端是UE为例，描述本申请实施例提供的技术方案。
本申请实施例涉及到的接入网设备包括基站(base station，BS)，可以是一种部署在无线接入网中能够和终端进行无线通信的设备。其中，基站可能有多种形式，比如宏基站、微基站、中继站和接入点等。示例性地，本申请实施例涉及到的基站可以是5G中的基站或长期演进(long term Evolution，LTE)系统中的基站，其中，5G中的基站还可以称为发送接收点(transmission reception point，TRP)或gNB。本申请实施例中，用于实现接入网设备的功能的装置可以是接入网设备；也可以是能够支持接入网设备实现该功能的装置，例如芯片系统，该装置可以被安装在接入网设备中。在本申请实施例提供的技术方案中，以用于实现网络设备的功能的装置是接入网设备，以接入网设备是基站为例，描述本申请实施例提供的技术方案。
本申请实施例提供的技术方案可以应用于通信设备间的无线通信。通信设备间的无线通信可以包括：网络设备和终端间的无线通信、网络设备和网络设备间的无线通信以及终端和终端间的无线通信。其中，在本申请实施例中，术语“无线通信”还可以简称为“通信”，术语“通信”还可以描述为“数据传输”、“信息传输”或“传输”。该技术方案可用于进行调度实体和从属实体间的无线通信，本领域技术人员可以将本申请实施例提供的技术方案用于进行其它调度实体和从属实体间的无线通信，例如宏基站和微基站之间的无线通信，例如第一终端和第二终端间的无线通信。为了简化描述，本申请实施例以接入网设备和终端设备间的通信为例，描述本申请实施例提供的方法。
图1给出了本申请实施例提供的技术方案所适用的一种通信系统的示意图，该通信系统可以包括一个或多个接入网设备100(仅示出了1个)以及能够与接入网设备100进行通信的一个或多个终端200(仅示出了1个)。图1仅为示意图，并不构成对本申请实施例提供的技术方案的适用场景的限定。
接入网设备100可以是TRP、基站、中继站或接入点等。接入网设备100可以是5G通信系统中的网络设备或未来演进网络中的接入网设备；还可以是可穿戴设备或车载设备等。另外接入网设备100还可以是：全球移动通信系统(global system for mobile communication，GSM)或码分多址(code division multiple access，CDMA)网络中的基站收发信台(base transceiver station，BTS)，也可以是宽带码分多址(wideband code division multiple access，WCDMA)中的NB(NodeB)，还可以是LTE中的eNB或eNodeB(evolutional NodeB)。接入网设备100还可以是云无线接入网络(cloud radio access network，CRAN)场景下的无线控制器。
终端200可以是UE、接入终端、UE单元、UE站、移动站、移动台、远方站、远程终端、移动设备、UE终端、无线通信设备、UE代理或UE装置等。接入终端可以是蜂窝电话、无绳电话、会话发起协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字处理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备、处理设备、车载设备、可穿戴设备，5G网络中的终端或未来演进的公共陆地移动网络(public land mobile network，PLMN)网络中的终端等。
需要说明的是，图1所示通信系统可以是LTE系统、LTE-Advanced系统、NR系统、超高可靠超短时延通信(ultra reliable low latency communications，URLLC)场景、窄带物联网(narrow band internet of things，NB-IoT)系统、增强机器类通信(enhanced machine type communications，eMTC)系统等，但本申请实施例提供的方法适用的通信系统不限于上述几种通信系统。
本申请实施例提供的技术方案在通信系统中应用时，可以应用于各种接入技术。例如，可以应用于正交多址接入(orthogonal multiple access，OMA)技术或非正交多址接入(non-orthogonal multiple access，NOMA)技术。应用于正交多址接入技术时，可以应用于正交频分多址(orthogonal frequency division multiple access，OFDMA)或单载波频分多址(single carrier frequency division multiple access，SC-FDMA)等技术，本申请实施例不做限制。应用于非正交多址接入技术时，可以应用于稀疏码多址接入(sparse code multiple access，SCMA)、多用户共享接入(multi-user shared access，MUSA)、图样分割多址接入(pattern division multiple access，PDMA)、交织格栅多址接入(interleave-grid multiple access，IGMA)、资源扩展多址接入(resource spreading multiple access，RSMA)、非正交编码多址接入(non-orthogonal coded multiple access，NCMA)或非正交编码接入(non-orthogonal coded access，NOCA)等技术，本申请实施例不做限制。
另外，图1所示通信系统中，接入网设备100、和/或终端200上可以部署多根天线，利用多天线技术进行通信，显著提高无线通信系统的性能。在一些实现方式中，接入网设备100为发送端、终端200为接收端；在另一种可能的实现方式中，终端200为发送端、网络设备100为接收端。参考图1，在通信过程中，发送端可以使用多个天线向接收端发送信号，接收端使可以用一个或多个天线接收该信号；或者发送端可以使用一个天线向接收端发送信号，接收端使可以用多个天线接收该信号。
在描述本申请实施例之前，此处先对本申请涉及的名词进行解释。
视频帧，视频是由连续的图像组成的，一个视频帧就是一个图像。视频帧是应用层的数据单位。
数据包，视频帧传输和到网络层就对应一个或多个IP包，传到PDCP层会对应一个或多个PDCP层数据包。
传输队列，是指终端缓存中等待发送的数据包的集合。
驻留时延，是指数据包到达终端缓存的时刻到当前时刻的时长。
队列首包时延，是指终端传输队列中第一个待传输数据包在队列中的驻留时延。
下面结合附图，对本申请的实施例进行具体阐述。
一方面，本申请实施例提供一种通信设备。图2示出的是与本申请各实施例相关的一种通信设备20。通信设备20可以为图1所示的通信系统中的接入网设备100或者终端200。如图2所示，通信设备20可以包括：处理器201、存储器202、通信接口203。
下面结合图2对通信设备20的各个构成部件进行具体的介绍：
存储器202，可以是易失性存储器(volatile memory)，例如随机存取存储器(random-access memory，RAM)；或者非易失性存储器(non-volatile memory)，例如只读存储器(read-only memory，ROM)，快闪存储器(flash memory)，硬盘(hard disk drive，HDD)或固态硬盘(solid-state drive，SSD)；或者上述种类的存储器的组合，用于存储可实现本申请方法的程序代码、以及配置文件。需要说明的是，存储器202中存储的可实现本申请方法的程序代码、以及配置文件，可以预先配置或者通过互联网下载，本申请实施例对此不进行具体限定。
处理器201是通信设备20的控制中心，可以是一个中央处理器(central processing unit，CPU)，也可以是特定集成电路(application specific integrated circuit，ASIC)，或者是被配置成实施本申请实施例的一个或多个集成电路，例如：一个或多个微处理器(digital singnal processor，DSP)，或，一个或者多个现场可编程门阵列(field programmable gate array，FPGA)。处理器201可以通过运行或执行存储在存储器202内的软件程序和/或模块，以及调用存储在存储器202内的数据，执行通信设备20的各种功能。
通信接口203用于通信设备20与其他单元进行交互。该通信接口203可以是收发器、电路、模块、或接口等。通信接口203还可以用于与通信网络通信，如以太网，无线接入网(radio access network，RAN)，无线局域网(wireless local area networks，WLAN)等。通信接口203可以包括接收单元实现接收功能，以及发送单元实现发送功能。
本申请实施例中不限定上述通信接口203、处理器201以及存储器202之间的具体连接介质。本申请实施例在图2中以存储器202、处理器201以及通信接口203之间通过总线连接，总线在图2中以粗线表示，其它部件之间的连接方式，仅是进行示意性说明，并不引以为限。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示，图2中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
一种可能的实现中，处理器201通过运行或执行存储在存储器202内的软件程序和/或模块，以及调用存储在存储器202内的数据，执行如下功能：
通过通信接口203接收终端在被调度时发送的调度参考信息，该调度参考信息为终端的传输队列中下一个待传输数据包的缓冲区状态信息和/或对应视频帧的被参考次数；按照优先级算法及调度参考信息，确定该终端的调度优先级。
一种可能的实现中，处理器201通过运行或执行存储在存储器202内的软件程序和/或模块，以及调用存储在存储器202内的数据，执行如下功能：
获取调度参考信息，该调度参考信息为该终端的传输队列中下一个待传输数据包的缓冲区状态信息和/或对应视频帧的被参考次数；在被调度时，通过通信接口203向接入网设备发送该调度参考信息，该调度参考信息用于接入网设备确定该通信设备20 的调度优先级。
一种可能的实现中，处理器201通过运行或执行存储在存储器202内的软件程序和/或模块，以及调用存储在存储器202内的数据，执行如下功能：
通过通信接口203接收终端在调度参考信息发生变化时发送的最新的调度参考信息，该最新的调度参考信息为终端的传输队列中首个待传输数据包对应的视频帧最新的被参考次数；按照优先级算法及最新的调度参考信息，确定该终端的调度优先级。
一种可能的实现中，处理器201通过运行或执行存储在存储器202内的软件程序和/或模块，以及调用存储在存储器202内的数据，执行如下功能：
监测调度参考信息，该调度参考信息为该终端的传输队列中首个待传输数据包对应视频帧的被参考次数；在该调度参考信息发生变化时，通过通信端口203向接入网设备发送最新的调度参考信息，最新的调度参考信息用于接入网设备确定该通信设备20调度优先级。
需要说明的是，图2中示出的通信装置结构并不构成对通信装置的限定，可以包括比图示更多或更少的部件，或者组合某些部件，或者不同的部件布置。
再一方面，本申请实施例提供一种确定调度优先级的方法，应用于通信系统中接入网设备为终端确定调度优先级。对于一个接入网设备，其为每个与其通信的终端确定调度优先级的方法相同，本申请实施例仅描述接入网设备与一个终端交互为该终端确定调度优先级的过程，后续不再逐一说明。
如图3所示，本申请实施例提供的一种确定调度优先级的方法可以包括：
S301、终端获取调度参考信息。
该调度参考信息为终端的传输队列中下一个待传输数据包的缓冲区状态信息和/或对应视频帧的被参考次数。
可选的，下一个待传输数据包，可以包括：除当前要传输的数据包以外的第一个待传输包，或者，队列首包。在不同的场景中，下一个待传输数据包有不同的定义，本申请实施例对此不进行具体限定。
例如，若调度参考信息是终端在被调度时采用各层包头的控制信息上报，则下一个待传输包是指除当前要传输的包以外的第一个待传输包。若调度参考信息是通过新定义的控制信息上报，则下一个待传输包是队列首包。当然，对于下一个待传输数据包的定义，可以根据实际需求配置，本申请实施例对此不进行具体限定。
其中，缓冲区状态信息用于体现终端的传输队列中下一个待传输数据包在缓冲区中的特征，该特征与视频传输的质量强相关。在实际应用中，以数据包的某一缓冲区状态越强该数据包则需越先调度以保证视频传输的时延以及质量为原则，根据实际需求配置缓冲区状态信息的内容。
示例性的，缓冲区状态信息可以包括下述信息中至少一项：在传输队列中的驻留时延、数据包大小。
具体的，驻留时延长的数据包，若越先调度，可避免其被PDCP定时机制丢弃，提高了视频传输的质量，因此驻留时延可以作为缓冲区状态信息。数据量大的数据包，若被丢弃对视频传输的质量影响较大，若越先调度，可避免其被PDCP定时机制丢弃，提高了视频传输的质量，因此数据包大小可以作为缓冲区状态信息。
当然，在实际应用中还可以确定缓冲区状态信息的内容为其他，并不局限于此处示例的在传输队列中的驻留时延和/或数据包大小。
其中，数据包对应视频帧的被参考次数，是产生该数据包的视频帧被其他帧参考的次数。
一种可能的实现中，调度参考信息的内容，可以为终端内部的运行参数，终端在S301中直接读取即可获得。
另一种可能的实现中，调度参考信息可以为应用层存储的参数，由应用层传输到网络层，在S301中，终端的网络层接收应用层传输的调度参考信息即可。需要说明的是，应用层与网络层的信息传输过程，本文不进行限定。
S302、终端在被调度时，向接入网设备发送调度参考信息。
其中，S302中终端向接入网设备发送的调度参考信息，即S301中终端获取的调度参考信息。在S302中，终端发送的调度参考信息用于接入网设备确定该终端的调度优先级。
具体的，终端在被接入网设备调度时，物理层会接收到调度指令，物理层向MAC层发送调度指示，MAC向RLC层发送传输指示，RLC层从缓存中取出被调度大小的数据作为数据包进行传输。
可选的，S302中终端在被调度时，向接入网设备发送调度参考信息的具体实现方式可以包括但不限于下述两种实现：
第一种实现、在S302中，终端在被调度时，可以采用进行传输的数据包各层包头中现有的控制信息携带调度参考信息，在数据信道上传输，以实现向接入网设备发送调度参考信息。
在第一种实现中，下一个待传输包是指除当前要传输的包以外的第一个待传输包。
示例性的，S302具体可以实现为：终端在被调度时，向接入网设备发送携带调度参考信息的PDCP PDU。终端可以将调度参考信息携带在新定义的PDU中向接入网设备发送。
在此方式中，终端通过PDCP PDU上报传输队列中下一个待传输包在队列中的驻留时延(此示例中的调度参考信息示例为驻留时延，并不是对调度参考信息的限定)。
图4示意了PDCP控制PDU的类型，000为PDCP状态报告(PDCP status report)，001为分散的健壮性包头压缩(robust header compression，ROHC)反馈包(interspersed ROHC feedback packet)，010为LTE WLAN聚合(LTE WLAN aggregation，LWA)状态报告(LWA status report)，011为LWA结束标志包(LWA end-marker packet)，100为上行数据压缩(uplink data compression，UDC)反馈包(UDC feedback packet)，101-111为保留(reserved)的PDU Type。利用PDCP Type的保留字段(PDU Type＝111)，定义一种新的控制PDU，称为时延PDU。在终端每次被调度时，PDCP层通过时延PDU上传队列中下一个待传输数据包的驻留时延(若队列中已无下一个待传输包，则上报驻留时延0)。
图5示意了一种时延PDU的内部架构，第一位为0表示该PDU为控制PDU，第2-4位为111表示PDU类型是新定义的时延PDU，第5-8位为保留位，9-16位为量化后的时延。
再例如，S302具体可以实现为：终端在被调度时，向接入网设备发送携带调度参考信息的MAC CE。终端可以将调度参考信息携带在新定义的MAC CE中向接入网设备发送。
在此方式中，用户通过MAC CE上报传输队列中下一个待传输包在队列中的驻留时延(此示例中的调度参考信息示例为驻留时延，并不是对调度参考信息的限定)。图6是一个MAC PDU的内部示意图，一个MAC PDU包含一个MAC头(MAC header)，0个或者更多MAC CE，0个或者更多MAC SDU以及填充(Padding)，其中，Padding为可选。MAC CE、MAC SDU、Padding组成MAC载荷(payload)。MAC头中包括多个MAC子头(sub-header)，每个MAC sub-header对应一个MAC CE或MAC SDU或Padding，sub-header里的LCID域用来表示sub-header具体对应哪一种MAC SDU或MAC CE或Padding。
图6a示意了MAC PDU中的LCID域的内部架构，LCID共5比特，图中索引(Index)表示LCID的具体数值，LCID取值(values)表示MAC CE或MAC SDU或Padding的类型。如图6a所示，00000为公共控制信道(common control channel,CCCH)，00001-01010为逻辑通道的标识(Identity of the logical channel)，01011-11000为LCID的保留字段，11001为扩展功率余量上报(extended power headroom report)，11010为功率余量上报(power headroom report)，11011为小区无线网络临时标识(cell radio network temporary identifier，C-RNTI)，11100为缩短的(Truncated)缓冲区状态报告(buffer status report，BSR)，11101为短BSR(Short BSR)，11110为长BSR(Long BSR)，11111为填充，利用LCID的保留字段定义一种新的MAC CE，称为时延MAC CE。在终端每次被调度时，MAC层通过时延MAC CE上传传输队列中下一个待传输数据包的驻留时延。
示例性的，定义时延MAC CE的实现方式可以是，定义sub-header中LCID Index为01011时，LCID values是时延MAC CE。基站收到MAC PDU后，读取sub-header中LCID的值为01011，即可知道此sub-header对应时延MAC CE。由于每种LCID Index对应的MAC CE或MAC SDU或Padding的长度都是确定的，因此可以在MAC PDU中找到时延MAC CE的位置。例如，时延MAC CE的长度可以设定为2个字节，即16比特，若时延量化间隔为1毫秒，可表示0-65535毫秒的时延。
需要说明的是，时延MAC CE的长度可以根据实际需求配置，为整数字节即可，本申请实施例对此不进行具体限定。
第二种实现、在S302中，终端向接入网设备发送携带调度参考信息的控制信息。通过新定义控制信息用于发送调度参考信息，该控制信息在控制信道传输。
S303、接入网设备接收终端在被调度时发送的调度参考信息。
需要说明的是，S303中接入网设备接收的调度参考信息，即S302中终端在被调度时发送的调度参考信息。
与S302中的描述相对应，S303中接入网设备可以通过但不限于下述两种实现方式接收终端在被调度时发送的调度参考信息，包括：
实现方式1、接入网设备接收终端在被调度时，采用进行传输的数据包各层包头中现有的控制信息携带的调度参考信息，该调度参考信息在数据信道上传输。
示例性的，接入网设备可以接收终端在被调度时发送的携带调度参考信息的PDCP PDU。该方式的具体实现已在S302中进行了详细描述，此处不再进行赘述。
示例性的，接入网设备可以接收所述终端在被调度时发送的携带调度参考信息的MAC CE。该方式的具体实现已在S302中进行了详细描述，此处不再进行赘述。
实现方式2、接入网设备恩接收终端在被调度时发送的携带调度参考信息的控制信息，该控制信息在控制信道传输。
S304、接入网设备按照优先级算法及调度参考信息，确定终端的调度优先级。
其中，优先级算法可以包括：调度参考信息数值大的终端的调度优先级高。在实际应用中，优先级算法的具体内容，本申请实施例并不进行具体限定，凡是调度参考信息数值大的终端的调度优先级高的优先级算法，均可以作为S304中所描述的优先级算法。
本申请实施例提供一种具体的优先级算法的内容，可以包括：设置与调度参考信息相关的因子，该因子与调度参考信息为增函数关系。
其中，增函数关系可以包括但不限于下述函数关系中的至少一种：单调递增的线性函数、指数函数、对数函数、幂函数等。
需要说明的是，优先级算法中可以仅包括与调度参考信息相关的因子，当然，优先级算法中也可以包括与调度参考信息相关的因子以及其他因子，本申请实施例对此不进行具体限定。
示例性的，优先级算法可以为比例公平算法、轮询算法、最大载干算法等，本申请对此不进行具体限定。
例如，假设优先级算法为比例公平算法，计算公式为
Figure PCTCN2020083799-appb-000001
其中，P k表示第k个用户的调度优先级，P k的值越大则优先级越高。R k和T k分别表示第k个用户当前速率和历史累积平均速率。在比例公平优先级计算公式中添加与调度参考信息相关的因子，用A k表示此因子，则优先级计算公式为
Figure PCTCN2020083799-appb-000002
定义调度参考信息为N，则A k与N为增函数关系。例如，A k＝N、A k＝2 N、A k＝log(N+1)、A k＝N 2等。
在另一种可能的实现中，当调度参考信息为在传输队列中的驻留时延时，S304中接入网设备按照优先级算法及调度参考信息，确定终端的调度优先级，可以包括：根据驻留时延获取终端的队列首包时延，将终端的队列首包时延代入优先级算法，确定终端的调度优先级。
示例性的，本申请实施例提供一种接入网设备根据驻留时延获取终端的队列首包时延的实现方式，包括：若驻留时延τ1不为0，终端的队列首包时延τ＝τ1+T3-T1；若τ1为0，τ＝T3-T2。
其中，T1为最后一次收到终端发送的驻留时延的时刻；T2为在T1之后接收到终端的用户请求的时刻；T3为当前时刻。用户请求可以是竞争接入请求、上行调度请求或其他。
具体的，接入网设备和与其通信的每个终端执行上述S301至S304的过程，为每个终端确定调度优先级，按照确定的调度优先级调度各个终端。
通过本申请提供的确定调度优先级的方法，结合终端被调度时传输队列中下一个 待传输数据包的缓冲区状态信息和/或对应视频帧的被参考次数确定调度优先级。一方面，由于缓冲区状态实时变化，因此终端被调度时数据包的缓冲区状态最准确，使确定的调度优先级更符合下一个待传输数据包的缓冲区状态，在PDCP层定时机制保证低传输时延的前提下避免了PDCP层定时机制导致的高丢包率。另一方面，由于视频传输帧间参考机制，一旦被参考的视频帧的数据包被丢弃，后续参考此帧的其他帧由于无法解码也将认为全部丢失，因此结合视频帧的被参考次数确定调度优先级，在PDCP层定时机制保证低传输时延的前提下避免了PDCP层定时机制导致的被参考次数高的视频帧中的数据包被丢弃而导致的高丢包率。
另一方面，本申请实施例提供的另一种确定调度优先级的方法，如图7所示，该方法可以包括：
S701、终端监测调度参考信息。
该调度参考信息为终端的传输队列中首个待传输数据包对应视频帧的被参考次数。
需要说明的是，对于调度参考信息的获取方式，在S301中已经进行了详细描述，S701的具体实现可以参考S301的具体实现，此处不再进行赘述。
S702、在调度参考信息发生变化时，终端向接入网设备发送最新的调度参考信息。
其中，最新的调度参考信息用于接入网设备确定所述终端的调度优先级。
需要说明的是，S702中终端发送最新的调度参考信息的方式，可以参照S302中终端向接入网设备发送调度参考信息的方式，此处不再进行赘述。
S703、接入网设备接收终端在调度参考信息发生变化时发送的最新的调度参考信息。
需要说明的是，S703中接入网设备接收的最新的调度参考信息，即7302中在调度参考信息发生变化时，终端向接入网设备发送最新的调度参考信息。
需要说明的是，S703中接入网设备接收最新的调度参考信息的方式，可以参照S303中接入网设备接收调度参考信息的方式，此处不再进行赘述。
S704、接入网设备按照优先级算法及最新的调度参考信息，确定终端的调度优先级。
其中，优先级算法可以包括：调度参考信息数值大的终端的调度优先级高。
一种可能的实现中，优先级算法包括：设置与调度参考信息相关的因子，该因子与调度参考信息为增函数关系。
需要说明的是，S704的具体实现与S304的具体实现相同，可参考前述S304的内容，此处不再进行赘述。
接入网设备和与其通信的每个终端执行上述S701至S704的过程，为每个终端确定调度优先级，按照确定的调度优先级调度各个终端。
通过本申请提供的确定调度优先级的方法，结合终端传输队列中首个待传输数据包对应视频帧的最新被参考次数确定调度优先级。由于视频传输帧间参考机制，一旦被参考的视频帧的数据包被丢弃，后续参考此帧的其他帧由于无法解码也将认为全部丢失，因此结合视频帧的最新被参考次数确定调度优先级，在PDCP层定时机制保证低传输时延的前提下避免了PDCP层定时机制导致的被参考次数高的视频帧中的数据包被丢弃而导致的高丢包率。另外，视频帧的被参考次数变化的概率很小，本申请在 调度参考信息发生变化时发送的最新的调度参考信息，降低了系统开销。
上述本申请提供的实施例中，分别从接入网设备、终端、以及接入网设备和终端之间交互的角度对本申请实施例提供的方法进行了介绍。为了实现上述本申请实施例提供的方法中的各功能，接入网设备和终端可以包括硬件结构和/或软件模块，以硬件结构、软件模块、或硬件结构加软件模块的形式来实现上述各功能。上述各功能中的某个功能以硬件结构、软件模块、还是硬件结构加软件模块的方式来执行，取决于技术方案的特定应用和设计约束条件。
本申请实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，另外，在本申请各个实施例中的各功能模块可以集成在一个处理器中，也可以是单独物理存在，也可以两个或两个以上模块集成在一个模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。
在采用对应各个功能划分各个功能模块的情况下，如图8所示为本申请实施例提供的确定调度优先级的装置80，用于实现上述方法中接入网设备的功能。该装置80可以是接入网设备，也可以是接入网设备中的装置，也可以是能够和接入网设备匹配使用的装置。其中，该确定调度优先级的装置80可以为芯片系统。本申请实施例中，芯片系统可以由芯片构成，也可以包含芯片和其他分立器件。如图8所示，确定调度优先级的装置80可以包括：接收模块801、确定模块802。接收模块801用于执行图3或图7中的过程S303、S703；确定模块802用于执行图3或图7中的过程S304、S704。其中，上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述，在此不再赘述。
如图9所示为本申请实施例提供的确定调度优先级的装置90，用于实现上述方法中接入网设备的功能。该确定调度优先级的装置90可以是接入网设备，也可以是接入网设备中的装置，也可以是能够和接入网设备匹配使用的装置。其中，该确定调度优先级的装置90可以为芯片系统。本申请实施例中，芯片系统可以由芯片构成，也可以包含芯片和其他分立器件。确定调度优先级的装置90包括至少一个处理模块901，用于实现本申请实施例提供的方法中接入网络设备的功能。示例性地，处理模块901可以用于执行图3或图7中的过程S304、S704，具体参见方法示例中的详细描述，此处不做赘述。
确定调度优先级的装置90还可以包括至少一个存储模块902，用于存储程序指令和/或数据。存储模块902和处理模块901耦合。本申请实施例中的耦合是装置、单元或模块之间的间接耦合或通信连接，可以是电性，机械或其它的形式，用于装置、单元或模块之间的信息交互。处理模块901可能和存储模块902协同操作。处理模块901可能执行存储模块902中存储的程序指令。所述至少一个存储模块中的至少一个可以包括于处理模块中。
[根据细则91更正 10.04.2020]　
确定调度优先级的装置90还可以包括通信模块903，用于通过传输介质和其它设备进行通信，从而用于确定调度优先级的装置90中的装置可以和其它设备进行通信。示例性地，该其它设备可以是终端。所述通信模块903用于该装置与其它设备进行通信。示例性的，处理模块901利用通信模块903执行图3或图7中的过程S303、S703。
当处理模块901为处理器，存储模块902为存储器，通信模块903为通信接口时， 本申请实施例图9所涉及的确定调度优先级的装置90可以为图2所示的通信设备20。
如前述，本申请实施例提供的确定调度优先级的装置80或确定调度优先级的装置90可以用于实施上述本申请各实施例实现的方法中接入网设备的功能，为了便于说明，仅示出了与本申请实施例相关的部分，具体技术细节未揭示的，请参照本申请各实施例。
在采用对应各个功能划分各个功能模块的情况下，如图10所示为本申请实施例提供的确定调度优先级的装置100，用于实现上述方法中终端的功能。该确定调度优先级的装置100可以是终端，也可以是终端中的装置，也可以是能够和终端匹配使用的装置。其中，该确定调度优先级的装置100可以为芯片系统。本申请实施例中，芯片系统可以由芯片构成，也可以包含芯片和其他分立器件。如图10所示，确定调度优先级的装置100可以包括：获取模块1001、发送模块1002。获取模块1001用于执行图3中的过程S301；发送模块1002用于执行图3中的过程S302。其中，上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述，在此不再赘述。
在采用对应各个功能划分各个功能模块的情况下，如图11所示为本申请实施例提供的另一种确定调度优先级的装置110，用于实现上述方法中终端的功能。该确定调度优先级的装置110可以是终端，也可以是终端中的装置，也可以是能够和终端匹配使用的装置。其中，该确定调度优先级的装置110可以为芯片系统。本申请实施例中，芯片系统可以由芯片构成，也可以包含芯片和其他分立器件。如图11所示，确定调度优先级的装置110可以包括：监测模块1101、发送模块1102。监测模块1101用于执行图7中的过程S701；发送模块1102用于执行图7中的过程S702。其中，上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述，在此不再赘述。
如图12所示为本申请实施例提供的确定调度优先级的装置120，用于实现上述方法中终端的功能。该确定调度优先级的装置120可以是终端，也可以是终端中的装置，也可以是能够和终端匹配使用的装置。其中，该确定调度优先级的装置120可以为芯片系统。本申请实施例中，芯片系统可以由芯片构成，也可以包含芯片和其他分立器件。确定调度优先级的装置120包括至少一个处理模块1201，用于实现本申请实施例提供的方法中终端的功能。示例性地，处理模块1201可以用于执行图3或图7中的过程S301、S701，具体参见方法示例中的详细描述，此处不做赘述。
确定调度优先级的装置120还可以包括至少一个存储模块1202，用于存储程序指令和/或数据。存储模块1202和处理模块1201耦合。本申请实施例中的耦合是装置、单元或模块之间的间接耦合或通信连接，可以是电性，机械或其它的形式，用于装置、单元或模块之间的信息交互。处理模块1201可能和存储模块1202协同操作。处理模块1201可能执行存储模块1202中存储的程序指令。所述至少一个存储模块中的至少一个可以包括于处理模块中。
[根据细则91更正 10.04.2020]　
确定调度优先级的装置120还可以包括通信模块1203，用于通过传输介质和其它设备进行通信，从而用于确定调度优先级的装置120中的装置可以和其它设备进行通信。示例性地，该其它设备可以是终端。所述通信模块1203用于该装置与其它设备进 行通信。示例性的，处理模块1201利用通信模块1203执行图3或图7中的过程S302、S702。
当处理模块1201为处理器，存储模块1202为存储器，通信模块1203为通信接口时，本申请实施例图12所涉及的确定调度优先级的装置120可以为图2所示的通信设备20。
如前述，本申请实施例提供的确定调度优先级的装置100或确定调度优先级的装置110或确定调度优先级的装置120，可以用于实施上述本申请各实施例实现的方法中终端的功能，为了便于说明，仅示出了与本申请实施例相关的部分，具体技术细节未揭示的，请参照本申请各实施例。
再一方面，本申请实施例提供一种通信系统，该通信系统中包括第一通信装置和第二通信装置，该第一通信装置可以实现接入网设备的功能，该第二通信装置可以实现终端的功能。例如，第一通信装置为接入网设备，第二通信装置为终端。
作为本实施例的另一种形式，提供一种计算机可读存储介质，其上存储有指令，该指令被执行时执行上述方法实施例中的方法。
作为本实施例的另一种形式，提供一种包含指令的计算机程序产品，该指令被执行时执行上述方法实施例中的方法。
本申请实施例再提供一种芯片系统，该芯片系统包括处理器，用于实现本发明实施例的技术方法。在一种可能的设计中，该芯片系统还包括存储器，用于保存本发明实施例通信设备必要的程序指令和/或数据。在一种可能的设计中，该芯片系统还包括存储器，用于处理器调用存储器中存储的应用程序代码。该芯片系统，可以由一个或多个芯片构成，也可以包含芯片和其他分立器件，本申请实施例对此不作具体限定。
结合本申请公开内容所描述的方法或者算法的步骤可以硬件的方式来实现，也可以是由处理器执行软件指令的方式来实现。软件指令可以由相应的软件模块组成，软件模块可以被存放于RAM、闪存、ROM、可擦除可编程只读存储器(erasable programmable ROM，EPROM)、电可擦可编程只读存储器(electrically EPROM，EEPROM)、寄存器、硬盘、移动硬盘、只读光盘(CD-ROM)或者本领域熟知的任何其它形式的存储介质中。一种示例性的存储介质耦合至处理器，从而使处理器能够从该存储介质读取信息，且可向该存储介质写入信息。当然，存储介质也可以是处理器的组成部分。处理器和存储介质可以位于ASIC中。另外，该ASIC可以位于核心网接口设备中。当然，处理器和存储介质也可以作为分立组件存在于核心网接口设备中。或者，存储器可以与处理器耦合，例如存储器可以是独立存在，通过总线与处理器相连接。存储器也可以和处理器集成在一起。存储器可以用于存储执行本申请实施例提供的技术方案的应用程序代码，并由处理器来控制执行。处理器用于执行存储器中存储的应用程序代码，从而实现本申请实施例提供的技术方案。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统，装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
本领域技术人员应该可以意识到，在上述一个或多个示例中，本申请所描述的功能可以用硬件、软件、固件或它们的任意组合来实现。当使用软件实现时，可以将这些功能存储在计算机可读介质中或者作为计算机可读介质上的一个或多个指令或代码 进行传输。计算机可读介质包括计算机存储介质和通信介质，其中通信介质包括便于从一个地方向另一个地方传送计算机程序的任何介质。存储介质可以是通用或专用计算机能够存取的任何可用介质。所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统，装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统，装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理包括，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用硬件加软件功能单元的形式实现。
上述以软件功能单元的形式实现的集成的单元，可以存储在一个计算机可读取存储介质中。上述软件功能单元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)执行本申请各个实施例所述方法的部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
最后应说明的是：以上实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的精神和范围。

Claims (29)

  1. 一种确定调度优先级的方法，其特征在于，包括：
    接收终端在被调度时发送的调度参考信息，所述调度参考信息为所述终端的传输队列中下一个待传输数据包的缓冲区状态信息和/或对应视频帧的被参考次数；
    按照优先级算法及所述调度参考信息，确定所述终端的调度优先级。
  2. 根据权利要求1所述的方法，其特征在于，所述缓冲区状态信息包括下述信息中至少一项：在所述传输队列中的驻留时延、数据包大小。
  3. 根据权利要求2所述的方法，其特征在于，所述调度参考信息为在队列中的驻留时延；
    所述按照优先级算法及所述调度参考信息，确定所述终端的调度优先级，包括：
    根据所述驻留时延获取所述终端的队列首包时延，将所述终端的队列首包时延代入所述优先级算法，确定所述终端的调度优先级。
  4. 根据权利要求1-3任一项所述的方法，其特征在于，所述优先级算法包括：调度参考信息数值大的终端的调度优先级高。
  5. 根据权利要求4所述的方法，其特征在于，所述优先级算法包括：设置与所述调度参考信息相关的因子，所述因子与所述调度参考信息为增函数关系。
  6. 根据权利要求3所述的方法，其特征在于，所述根据所述驻留时延获取所述终端的队列首包时延，包括：
    若所述驻留时延τ1不为0，所述终端的队列首包时延τ＝τ1+T3-T1；
    若所述τ1为0，所述τ＝T3-T2；
    其中，所述T1为最后一次收到所述终端发送的驻留时延的时刻；所述T2为在所述T1之后接收到所述终端的用户请求的时刻；所述T3为当前时刻。
  7. 根据权利要求1-6任一项所述的方法，其特征在于，所述接收终端在被调度时发送的调度参考信息，包括：
    接收所述终端在被调度时发送的携带所述调度参考信息的分组数据汇聚协议PDCP协议数据单元PDU；
    或者，
    接收所述终端在被调度时发送的携带所述调度参考信息的媒体访问控制MAC控制单元CE；
    或者，
    接收所述终端在被调度时发送的携带所述调度参考信息的控制信息。
  8. 根据权利要求1-7任一项所述的方法，其特征在于，所述下一个待传输数据包，包括：
    除当前要传输的数据包以外的第一个待传输包，或者，队列首包。
  9. 一种确定调度优先级的方法，其特征在于，包括：
    获取调度参考信息，所述调度参考信息为终端的传输队列中下一个待传输数据包的缓冲区状态信息和/或对应视频帧的被参考次数；
    在被调度时，向接入网设备发送所述调度参考信息，所述调度参考信息用于所述接入网设备确定所述终端的调度优先级。
  10. 根据权利要求9所述的方法，其特征在于，
    所述缓冲区状态信息包括下述信息中至少一项：在所述传输队列中的驻留时延、数据包大小。
  11. 根据权利要求9或10所述的方法，其特征在于，所述向接入网设备发送所述调度参考信息，包括：
    向所述接入网设备发送携带所述调度参考信息的分组数据汇聚协议PDCP协议数据单元PDU；
    或者，
    向所述接入网设备发送携带所述调度参考信息的媒体访问控制MAC控制单元CE；
    或者，
    向所述接入网设备发送携带所述调度参考信息的控制信息。
  12. 根据权利要求9-11任一项所述的方法，其特征在于，所述下一个待传输数据包，包括：
    除当前要传输的数据包以外的第一个待传输包，或者，队列首包。
  13. 一种确定调度优先级的方法，其特征在于，包括：
    接收终端在调度参考信息发生变化时发送的最新的调度参考信息，所述最新的调度参考信息为所述终端的传输队列中首个待传输数据包对应的视频帧最新的被参考次数；
    按照优先级算法及所述最新的调度参考信息，确定所述终端的调度优先级。
  14. 根据权利要求13所述的方法，其特征在于，所述优先级算法包括：调度参考信息数值大的终端的调度优先级高。
  15. 根据权利要求14所述的方法，其特征在于，所述优先级算法包括：设置与所述调度参考信息相关的因子，所述因子与所述调度参考信息为增函数关系。
  16. 根据权利要求13-15任一项所述的方法，其特征在于，所述接收终端在调度参考信息变化时发送的所述调度参考信息，包括：
    接收所述终端在所述调度参考信息变化时发送的携带所述调度参考信息的分组数据汇聚协议PDCP协议数据单元PDU；
    或者，
    接收所述终端在所述调度参考信息变化时发送的携带所述调度参考信息的媒体访问控制MAC控制单元CE；
    或者，
    接收所述终端在所述调度参考信息变化时发送的携带所述调度参考信息的控制信息。
  17. 一种确定调度优先级的方法，其特征在于，包括：
    监测调度参考信息，所述调度参考信息为终端的传输队列中首个待传输数据包对应视频帧的被参考次数；
    在所述调度参考信息发生变化时，向接入网设备发送最新的调度参考信息，所述最新的调度参考信息用于所述接入网设备确定所述终端的调度优先级。
  18. 根据权利要求17所述的方法，其特征在于，所述向接入网设备发送最新的所 述调度参考信息，包括：
    向所述接入网设备发送携带最新的所述调度参考信息的分组数据汇聚协议PDCP协议数据单元PDU；
    或者，
    向所述接入网设备发送携带最新的所述调度参考信息的媒体访问控制MAC控制单元CE；
    或者，
    向所述接入网设备发送携带最新的所述调度参考信息的控制信息。
  19. 一种装置，其特征在于，用于实现如权利要求1至8和13至16中任一项所述的方法。
  20. 一种装置，包括处理器和存储器，所述存储器和所述处理器耦合，所述处理器用于执行权利要求1至8和13至16中任一项所述的方法。
  21. 一种装置，包括处理器和通信接口，
    所述处理器利用所述通信接口，接收终端在被调度时发送的调度参考信息，所述调度参考信息为所述终端的传输队列中下一个待传输数据包的缓冲区状态信息和/或对应视频帧的被参考次数；
    所述处理器用于按照优先级算法及所述调度参考信息，确定所述终端的调度优先级。
  22. 一种装置，包括处理器和通信接口，
    所述处理器利用所述通信接口，接收终端在调度参考信息发生变化时发送的最新的调度参考信息，所述最新的调度参考信息为所述终端的传输队列中首个待传输数据包对应的视频帧最新的被参考次数；
    所述处理器用于按照优先级算法及所述最新的调度参考信息，确定所述终端的调度优先级。
  23. 一种装置，其特征在于，用于实现如权利要求9至12、17和18中任一项所述的方法。
  24. 一种装置，包括处理器和存储器，所述存储器和所述处理器耦合，所述处理器用于执行权利要求9至12、17和18任一项所述的方法。
  25. 一种装置，包括处理器和通信接口，
    所述处理器用于获取调度参考信息，所述调度参考信息为终端的传输队列中下一个待传输数据包的缓冲区状态信息和/或对应视频帧的被参考次数；
    在被调度时，所述处理器利用所述通信接口向接入网设备发送所述调度参考信息，所述调度参考信息用于所述接入网设备确定所述终端的调度优先级。
  26. 一种装置，包括处理器和通信接口，
    所述处理器用于监测调度参考信息，所述调度参考信息为终端的传输队列中首个待传输数据包对应视频帧的被参考次数；
    在所述调度参考信息发生变化时，所述处理器利用所述通信接口向接入网设备发送最新的调度参考信息，所述最新的调度参考信息用于所述接入网设备确定所述终端的调度优先级。
  27. 一种通信系统，包括权利要求19-22任一项所述的装置，和权利要求23-26任一项所述的装置。
  28. 一种计算机可读存储介质，包括指令，当其在计算机上运行时，使得计算机执行权利要求1至18任一项所述的确定调度优先级的方法。
  29. 一种计算机程序产品，包括指令，当其在计算机上运行时，使得计算机执行权利要求1至18任一项所述的确定调度优先级的方法。
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