WO2023045714A1 - Procédé de programmation et appareil de communication - Google Patents

Procédé de programmation et appareil de communication Download PDF

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Publication number
WO2023045714A1
WO2023045714A1 PCT/CN2022/115596 CN2022115596W WO2023045714A1 WO 2023045714 A1 WO2023045714 A1 WO 2023045714A1 CN 2022115596 W CN2022115596 W CN 2022115596W WO 2023045714 A1 WO2023045714 A1 WO 2023045714A1
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layer data
application layer
data unit
scheduling
terminal device
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PCT/CN2022/115596
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English (en)
Chinese (zh)
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吴健
吴可镝
李拟珺
魏岳军
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华为技术有限公司
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Publication of WO2023045714A1 publication Critical patent/WO2023045714A1/fr

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    • 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
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies

Definitions

  • the present application relates to the field of communication technologies, and in particular, to a scheduling method and a communication device.
  • Extended reality (extended reality, XR) business has been extended to multiple application areas, such as entertainment , medical, education, retail, advertising and other fields.
  • audio and video transmission is a core of the XR service.
  • the XR video service is composed of multiple video frames, and each video frame arrives at the base station at a certain time interval (period).
  • New radio (NR) transmission of XR audio and video services has the characteristics of high bit rate, low delay, and periodic arrival of each frame.
  • NR decides how to schedule resources such as time, frequency and space for different users (for example, accessed terminal equipment). For example, when the NR allocates frequency resources to terminal devices, the use of multi-user pairing technology can enable multiple terminal devices to reuse the same frequency resources, thereby improving the utilization rate of frequency resources.
  • the fairness of XR user experience and/or the maximum number of XR users per cell can be used to measure the performance of XR services.
  • a scheduling strategy based on maximizing spectral efficiency (MaxSe) or a scheduling strategy based on maximizing proportional fairness (MaxPF) can be used.
  • the scheduling strategy based on Maximizing Spectral Efficiency (MaxSe) cannot guarantee the fairness of XR user experience. For example, the scheduling priority of users with good channel conditions is always higher than that of users with poor channel conditions, making it more difficult for users with poor channel conditions to obtain resources.
  • the scheduling policy based on Maximizing Proportional Fairness can only ensure the fairness based on the throughput rate of the media access control (MAC) layer but not the fairness based on the throughput rate of the application layer, so it cannot guarantee the XR user experience fairness.
  • MaxPF Maximizing Proportional Fairness
  • Embodiments of the present application provide a scheduling method and a communication device, which can ensure the fairness of application layer scheduling.
  • the embodiment of the present application provides a scheduling method, which can be executed by a network device, or by a component of the network device (such as a processor, a chip, or a chip system, etc.), or can be implemented by all or Logical modules or software implementations of some network device functions.
  • the historical application layer data unit rate of the terminal device is acquired, and according to the historical application layer data unit rate, the scheduling coefficient of the terminal device is determined, and the terminal device is scheduled according to the scheduling coefficient.
  • the historical application layer data unit rate is related to the number of application layer data units that have been completely scheduled by the terminal device.
  • the scheduling coefficient of the terminal device is determined according to the historical application layer data unit rate and the instantaneous medium access control MAC layer data unit rate.
  • the network device preferentially schedules the terminal device with the lower historical application layer data unit rate under the same instantaneous MAC layer data unit rate, thereby ensuring the application based on the application layer data unit layer fairness.
  • the network device determines the scheduling coefficient of the terminal device according to the historical application layer data unit rate and the instantaneous application layer data unit rate. Through this method, based on the information of the perceived application layer, the network device preferentially schedules the terminal device with a higher instantaneous application layer data unit rate under the same historical application layer data unit rate, thus ensuring the integrity of the application layer data unit , to reduce resource waste caused by incomplete application layer data units.
  • the instantaneous application layer data unit rate is determined according to one or more instantaneous MAC layer data unit rates corresponding to the currently scheduled application layer data unit in the scheduled period.
  • the scheduled time period is a time period corresponding to the scheduling start time corresponding to the application layer data unit being scheduled to the current scheduling time.
  • the dispatch coefficient satisfies:
  • AppPf represents the scheduling coefficient
  • dTbs represents the instantaneous MAC layer data unit rate
  • dHistFrmThp represents the historical application layer data unit rate
  • ⁇ represents the first adjustment coefficient, which satisfies 0 ⁇ 1.
  • the network device determines the scheduling coefficient based on the instantaneous MAC layer data unit rate and the historical application layer data unit rate, and in the case of the same instantaneous MAC layer data unit rate, preferentially schedules terminal devices with a lower historical application layer data unit rate , so as to ensure the fairness of the application layer based on the application layer data unit.
  • the scheduling coefficient may also be normalized by using the first adjustment coefficient.
  • the dispatch coefficient satisfies:
  • AppPf represents the scheduling coefficient
  • dFrmTbs represents the instantaneous application layer data unit rate
  • dHistFrmThp represents the historical application layer data unit rate
  • ⁇ represents the second adjustment coefficient, which satisfies 0 ⁇ 1.
  • the network device introduces the instantaneous application layer data unit rate based on the information of the perceived application layer, and in the case of the same historical application layer data unit rate, preferentially dispatches the terminal device with a higher instantaneous application layer data unit rate, thereby ensuring The integrity of the application layer data unit is guaranteed, and the waste of resources caused by the incomplete application layer data unit is reduced.
  • the scheduling coefficient may also be normalized through the second adjustment coefficient.
  • the scheduling coefficient is also related to the evaluation coefficient, and the evaluation coefficient is used to indicate the service quality of the application layer service.
  • the network device can also perform proportional fair scheduling on the application layer according to the user experience evaluation coefficient XQI on the network side, which is conducive to increasing the proportion of users reaching the XQI threshold, thereby helping to increase the maximum number of XR users that can be supported by each cell.
  • the evaluation coefficient is determined according to one or more of the following: the number of application layer data units successfully received by the terminal device, the number of application layer data units that have been sent, and the application layer data units that have been fully scheduled.
  • the scheduling duration of the data unit or the frame delay budget FDB is determined according to one or more of the following: the number of application layer data units successfully received by the terminal device, the number of application layer data units that have been sent, and the application layer data units that have been fully scheduled.
  • the scheduling duration of the data unit or the frame delay budget FDB The scheduling duration of the data unit or the frame delay budget FDB.
  • the network device receives indication information from the terminal device, where the indication information indicates the number of application layer data units successfully received by the terminal device.
  • the network device can obtain the number of application layer data units successfully received by the terminal device, so as to evaluate the quality of the XR service through the number of application layer data units successfully received by the terminal device.
  • the rate of the historical application layer data unit is also related to the scheduling delay corresponding to the application layer data unit that has been completely scheduled by the terminal device.
  • the network device ensures the integrity of the application layer data unit when determining the rate of the historical application layer data unit, and reduces resource waste caused by incomplete application layer data units.
  • the instantaneous MAC layer data unit rate is determined according to the maximum transport block size carried by the resource block allocated to the terminal device, or the instantaneous MAC layer data unit rate is determined according to the terminal device's spectral efficiency at the current moment definite.
  • the network equipment guarantees spectrum efficiency when determining the instantaneous MAC layer data unit rate, which is conducive to maintaining a high priority for terminal equipment to participate in scheduling and improving the throughput of the system.
  • the network device before obtaining the historical application layer data unit rate of the terminal device, the identifier of the MAC layer data unit is obtained, and the application layer data unit corresponding to the MAC layer data unit is determined according to the identifier of the MAC layer data unit.
  • the network device can perceive the information of the application layer based on the information of the MAC layer, so as to realize proportional fair scheduling of the application layer.
  • the network device can also perform post-scheduling processing, so that the historical application layer data unit rate of the terminal device that has completed the scheduling is increased compared with the historical application layer data unit rate when the scheduling has not been completed, thereby reducing the rate of the completed scheduling.
  • the priority of the terminal equipment ensures fairness.
  • the embodiment of the present application provides another scheduling method, which can be executed by a network device, or by a component of the network device (such as a processor, a chip, or a chip system, etc.), or can be implemented by all Or a logical module or software implementation of some network device functions.
  • a network device or by a component of the network device (such as a processor, a chip, or a chip system, etc.), or can be implemented by all Or a logical module or software implementation of some network device functions.
  • the MAC layer data unit rate of the terminal device is obtained, and according to the MAC layer data unit rate and the evaluation coefficient, the scheduling coefficient of the terminal device is determined, and the terminal device is scheduled according to the scheduling coefficient.
  • the evaluation coefficient is used to indicate the service quality of the application layer service.
  • the network device can perform proportional fair scheduling of the application layer according to the user experience evaluation coefficient XQI on the network side, which is conducive to increasing the proportion of users reaching the XQI threshold, thereby helping to increase the maximum number of XR users that can be supported by each cell.
  • the scheduling coefficient of the terminal device is determined according to the instantaneous MAC layer data unit rate and evaluation coefficient.
  • the scheduling coefficient of the terminal device is determined according to the historical MAC layer data unit rate and evaluation coefficient.
  • network devices can reduce the priority of terminal devices whose XQI is greater than the XQI threshold and increase the priority of terminal devices whose XQI is smaller than the XQI threshold under the same historical MAC layer data unit rate based on the information of the perceived application layer and the evaluation coefficient XQI.
  • the priority is helpful to increase the proportion of users who reach the XQI threshold, thereby helping to increase the maximum number of XR users that can be supported by each cell.
  • the network device determines the scheduling coefficient of the terminal device according to the instantaneous MAC layer data unit rate, the historical MAC layer data unit rate and the evaluation coefficient.
  • the network device can reduce the priority of terminal devices whose XQI is greater than the XQI threshold and increase the priority of terminal devices whose XQI is smaller than the XQI threshold based on the information of the perceived application layer and the evaluation coefficient XQI. , which is beneficial to increase the proportion of users reaching the XQI threshold, thereby helping to increase the maximum number of XR users that each cell can support.
  • the evaluation coefficient is determined according to one or more of the following: the number of application layer data units successfully received by the terminal device, the number of application layer data units that have been sent, and the application layer data units that have been fully scheduled.
  • the scheduling duration of the data unit or the frame delay budget FDB is determined according to one or more of the following: the number of application layer data units successfully received by the terminal device, the number of application layer data units that have been sent, and the application layer data units that have been fully scheduled.
  • the scheduling duration of the data unit or the frame delay budget FDB The scheduling duration of the data unit or the frame delay budget FDB.
  • the network device receives indication information from the terminal device, where the indication information indicates the number of application layer data units successfully received by the terminal device.
  • the network device can obtain the number of application layer data units successfully received by the terminal device, so as to evaluate the quality of the XR service through the number of application layer data units successfully received by the terminal device.
  • the embodiment of the present application provides a communication device.
  • the communication device may be a network device, or a device in the network device, or a device that can be used in conjunction with the network device, or a device that can realize all or part of the A logical module or software that functions as a network device.
  • the device includes a processing unit and an interface unit.
  • the processing unit is configured to obtain the historical application layer data unit rate of the terminal device, and the historical application layer data unit rate is related to the number of application layer data units that have been completely scheduled by the terminal device;
  • the processing unit is also used to determine the scheduling coefficient of the terminal device according to the historical application layer data unit rate;
  • the processing unit is also used to schedule the terminal equipment according to the scheduling coefficient.
  • the processing unit is used to determine the scheduling coefficient of the terminal device according to the historical application layer data unit rate, including:
  • the scheduling coefficient of the terminal equipment is determined.
  • the processing unit is used to determine the scheduling coefficient of the terminal device according to the historical application layer data unit rate, including:
  • the scheduling coefficient of the terminal equipment is determined.
  • the instantaneous application layer data unit rate is determined according to one or more instantaneous MAC layer data unit rates corresponding to the currently scheduled application layer data unit in the scheduled period.
  • the scheduled time period is a time period corresponding to the scheduling start time corresponding to the application layer data unit being scheduled to the current scheduling time.
  • the dispatch coefficient satisfies:
  • AppPf represents the scheduling coefficient
  • dTbs represents the instantaneous MAC layer data unit rate
  • dHistFrmThp represents the historical application layer data unit rate
  • ⁇ is the first adjustment coefficient, which satisfies 0 ⁇ 1.
  • the dispatch coefficient satisfies:
  • AppPf represents the scheduling coefficient
  • dFrmTbs represents the instantaneous application layer data unit rate
  • dHistFrmThp represents the historical application layer data unit rate
  • ⁇ is the second adjustment coefficient, which satisfies 0 ⁇ 1.
  • the scheduling coefficient is also related to the evaluation coefficient, and the evaluation coefficient is used to indicate the service quality of the application layer service.
  • the evaluation coefficient is determined according to one or more of the following: the number of application layer data units successfully received by the terminal device, the number of application layer data units that have been sent, and the application layer data units that have been fully scheduled.
  • the scheduling duration of the data unit or the frame delay budget FDB is determined according to one or more of the following: the number of application layer data units successfully received by the terminal device, the number of application layer data units that have been sent, and the application layer data units that have been fully scheduled.
  • the interface unit is configured to receive indication information from the terminal device, where the indication information indicates the number of application layer data units successfully received by the terminal device.
  • the rate of the historical application layer data unit is also related to the scheduling delay corresponding to the application layer data unit that has been completely scheduled by the terminal device.
  • the instantaneous MAC layer data unit rate is determined according to the maximum transport block size carried by the resource block allocated to the terminal device, or the instantaneous MAC layer data unit rate is determined according to the terminal device's spectral efficiency at the current moment definite.
  • the processing unit is also used to obtain the identifier of the MAC layer data unit before obtaining the historical application layer data unit rate of the terminal device, and determine the corresponding MAC layer data unit according to the identifier of the MAC layer data unit.
  • Application layer data unit is also used to obtain the identifier of the MAC layer data unit before obtaining the historical application layer data unit rate of the terminal device, and determine the corresponding MAC layer data unit according to the identifier of the MAC layer data unit.
  • the processing unit is also used to update the historical application layer data unit rate when multiple MAC layer data units corresponding to the currently scheduled application layer data unit have been fully scheduled.
  • the unit for implementing the scheduling method provided in the above third aspect and any possible design thereof can also achieve the beneficial effects of the scheduling method provided in the first aspect.
  • the embodiment of the present application provides another communication device.
  • the communication device may be a network device, or a device in the network device, or a device that can be used in conjunction with the network device, or it may be able to realize all or A logical module or software that functions as part of a network device.
  • the device includes a processing unit and an interface unit.
  • a processing unit configured to obtain the MAC layer data unit rate of the terminal device
  • the processing unit is also used to determine the scheduling coefficient of the terminal device according to the rate of the MAC layer data unit and the evaluation coefficient; wherein, the evaluation coefficient is used to indicate the service quality of the application layer business;
  • the processing unit is also used to schedule the terminal equipment according to the scheduling coefficient.
  • the processing unit is used to determine the scheduling coefficient of the terminal device according to the rate of the MAC layer data unit and the evaluation coefficient, including:
  • the scheduling coefficient of the terminal equipment is determined.
  • the processing unit is used to determine the scheduling coefficient of the terminal device according to the rate of the MAC layer data unit and the evaluation coefficient, including:
  • the processing unit is used to determine the scheduling coefficient of the terminal device according to the rate of the MAC layer data unit and the evaluation coefficient, including:
  • the scheduling coefficient of the terminal equipment is determined.
  • the evaluation coefficient is determined according to one or more of the following: the number of application layer data units successfully received by the terminal device, the number of application layer data units that have been sent, and the application layer data units that have been fully scheduled.
  • the scheduling duration of the data unit or the frame delay budget FDB is determined according to one or more of the following: the number of application layer data units successfully received by the terminal device, the number of application layer data units that have been sent, and the application layer data units that have been fully scheduled.
  • the interface unit is configured to receive indication information from the terminal device, where the indication information indicates the number of application layer data units successfully received by the terminal device.
  • the unit for implementing the scheduling method provided in the fourth aspect and any possible design thereof can also achieve the beneficial effects of the scheduling method provided in the second aspect.
  • the embodiment of the present application provides a device, including: a processor, the processor is coupled with a memory, and the memory is used to store instructions, and when the instructions are executed by the processor, the device implements the first aspect above, or A method in any possible design of the first aspect.
  • the embodiment of the present application provides a device, including: a processor, the processor is coupled with a memory, and the memory is used to store instructions, and when the instructions are executed by the processor, the device implements the second aspect above, or A method in any possible design of the second aspect.
  • the embodiments of the present application provide a computer-readable storage medium, on which instructions are stored, and when the instructions are run on the computer, the computer is made to execute any possible design of the first aspect, the first aspect, and the second aspect.
  • the embodiment of the present application provides a chip system, the chip system includes a processor, and may also include a memory, for realizing the above-mentioned first aspect, any possible design of the first aspect, the second aspect or the first aspect Either approach in the design is possible in two respects.
  • the system-on-a-chip may consist of chips, or may include chips and other discrete devices.
  • the embodiment of the present application also provides a computer program product, including computer program code, when the computer program code is run on the computer, the computer is made to execute any possible design of the first aspect, the first aspect, and the first aspect.
  • FIG. 1 is a schematic diagram of an application field of an XR service provided by an embodiment of the present application
  • FIG. 2 is a schematic diagram of fairness of a user experience index provided by an embodiment of the present application
  • FIG. 3 is a schematic structural diagram of a communication system provided by an embodiment of the present application.
  • FIG. 4 is a schematic diagram of a communication scenario provided by an embodiment of the present application.
  • FIG. 5 is a schematic diagram of another communication scenario provided by an embodiment of the present application.
  • FIG. 6 is a schematic diagram of another communication scenario provided by an embodiment of the present application.
  • FIG. 7 is a schematic diagram of another communication scenario provided by an embodiment of the present application.
  • FIG. 8 is a schematic flowchart of a scheduling method provided by an embodiment of the present application.
  • FIG. 9 is a schematic diagram of an application layer data unit and a MAC layer data unit provided by an embodiment of the present application.
  • FIG. 10 is a schematic flowchart of another scheduling method provided by the embodiment of the present application.
  • FIG. 11 is a schematic diagram of a communication device provided by an embodiment of the present application.
  • FIG. 12 is a schematic diagram of another communication device provided by an embodiment of the present application.
  • Extended reality (extended reality, XR) business including virtual reality (virtual reality, VR), augmented reality (augmented reality, AR), mixed reality (mixed reality, MR) and other services) has been extended to entertainment, medical care, education, retail , advertising and many other application areas, as shown in Figure 1.
  • audio and video transmission is a core of the XR service.
  • the XR video service as an example, the XR video is composed of multiple video frames, and each video frame arrives at the base station at a certain time interval (period).
  • New air interface (new radio, NR) transmission of XR audio and video services has the following characteristics:
  • XR audio and video services require higher resolution than general audio and video services, so XR audio and video services have the characteristics of high bit rate, and the transmission rate of XR audio and video services is also higher than that of general audio and video services.
  • the transmission rate is 30 megabits per second (millionbits per second, Mbps).
  • Video frames in XR audio and video services arrive periodically.
  • Common XR audio and video service frame rates are 60 frames per second (frame per second, fps), 90 fps, and 120 fps, and the time interval for video frames to reach the base station is roughly the reciprocal of the frame rate.
  • the uplink and downlink frame delay budget (frame delay budget, FDB) of the video frame is about 10ms.
  • FDB represents the budget of the time length from when the first packet of the video frame arrives at the base station until the last packet of the video frame is scheduled.
  • a video frame compressed by a source compression standard (such as H.265/HEVC) generally consists of multiple IP packets.
  • a source compression standard such as H.265/HEVC
  • Cliff effect refers to the phenomenon that bit-level errors propagate within a video frame. A single bit error will lead to a sharp decline in the quality of the entire video frame, which means that the terminal device can only play a frame of picture normally only after successfully receiving all the data packets of a video frame.
  • NR When NR schedules resources for different users, it usually adopts a scheduling strategy based on maximize spectral efficiency (MaxSe) or a scheduling strategy based on maximize proportional fair (MaxPF).
  • MaxSe maximize spectral efficiency
  • MaxPF maximize proportional fair
  • the scheduling strategy based on MaxSe cannot guarantee the fairness of XR user experience. For example, the scheduling priority of users with good channel conditions is always higher than that of users with poor channel conditions, making it more difficult for users with poor channel conditions to obtain resources.
  • the scheduling policy based on MaxPF can only ensure the fairness of the throughput rate of the media access control (MAC) layer, but cannot ensure the fairness based on the throughput rate of the application layer, so it cannot guarantee the fairness of the XR user experience.
  • MAC media access control
  • FIG. 2 is a schematic diagram of the fairness of a user experience index.
  • FIG. 2 shows that the cliff effect will cause the MAC layer throughput to be inconsistent with the actual application layer throughput.
  • the above scheduling strategy based on MaxSe or MaxPF does not reflect the concept of application data unit (application data unit, ADU). For example, taking a video frame as an example, a video frame is split into multiple frame data packets during transmission at the MAC layer.
  • ADU application data unit
  • the frame data packets scheduled by the MAC layer may It is impossible to form a complete frame of video, resulting in waste of air interface resources, which in turn leads to a small maximum number of XR users per cell.
  • embodiments of the present application provide a scheduling method and a communication device.
  • this scheduling method when the network device determines the proportional fair scheduling coefficient of the application layer, the historical application layer data unit rate is introduced, and the historical application layer data unit rate reflects the number of complete application layer data units received by the terminal device.
  • the fairness of the application layer is guaranteed by preferentially scheduling terminal devices that have received a smaller number of complete application layer data units.
  • the historical application layer data unit rate will not increase. After a complete video frame has been transmitted, the historical application layer data unit rate increases. That is to say, the terminal device will maintain a higher priority to participate in scheduling before completing the transmission of a complete video frame, thereby ensuring the integrity of the video frame.
  • FIG. 3 is a communication system provided by an embodiment of the present application.
  • the scheduling method proposed in the embodiment of the present application can be applied to the communication system, and the communication system can be applied to a transmission scenario of an XR service.
  • the communication system includes a media server 301, a core network device 302, a network device 303, a terminal device 304a, a terminal device 304b, and a terminal device 304c.
  • the number and form of devices shown in Figure 3 are for example, and do not constitute a limitation to the embodiment of the present application. In practical applications, two or more media servers, two or more core network devices, two Or two or more network devices, two or more terminal devices.
  • the terminal device 304a, terminal device 304b, and terminal device 304c take a mobile phone as an example.
  • the terminal can be connected to the base station in a wireless manner, and the base station is connected to the core network equipment in a wireless or wired manner.
  • the core network equipment and the base station may be independent and different physical equipment, or the functions of the core network equipment and the base station may be integrated on one physical equipment, or a physical equipment may integrate part of the core network equipment. features and some features of the base station.
  • Terminals and base stations may be connected to each other in a wired or wireless manner. It should be noted that FIG. 3 is only an example, and the communication system may also include other network devices, such as wireless relay devices and wireless backhaul devices, which are not shown in FIG. 3 .
  • the technical solutions of the embodiments of the present application can be applied to various communication systems. For example, a fourth-generation mobile communication (4th-generation, 4G) system and a fifth-generation mobile communication (5th-generation, 5G) system.
  • the technical solutions of the embodiments of the present application may also be used in subsequent evolved communication systems such as a sixth-generation mobile communication (6th-generation, 6G) system, and the like.
  • the media server is a device for providing computing or application services.
  • the media server can be used to encapsulate media information, and send the encapsulated media information to the core network.
  • the media information mainly includes sequence numbers of frame data packets belonging to the same video frame.
  • the media information includes sequence numbers ⁇ 1, 2, 4, ... 60 ⁇ , and the packet data convergence protocol (PDCP) packets indexed by the sequence numbers ⁇ 1, 2, 4, ... 60 ⁇ belong to the same video frame.
  • PDCP packet data convergence protocol
  • the core network device has three functions of registration, connection and session management.
  • the network opening function module of the core network equipment is used to provide the service and capability of the 3GPP network function to the application function (application function, AF), and also allows the AF to provide information to the 3GPP network function.
  • the policy and charging function module of the core network equipment is used for the policy management of the charging policy and the service quality policy.
  • the session management function module (session management function, SMF) of the core network equipment is used to complete the terminal equipment (user equipment, UE) Internet protocol (Internet protocol, IP) address allocation, user plane function selection, billing and service quality policy control and other session management functions.
  • the user plane function module (user plane function, UPF) of the core network device is used to carry out user plane specific data forwarding, and generates bills based on traffic conditions, and also serves as a data plane anchor point.
  • the core network device is used to parse the media information and notify the network device of the media information through the general packet radio service tunneling protocol-uer plane (GTP-U) tunnel.
  • GTP-U general packet radio service tunneling protocol-uer plane
  • the core network device cannot obtain media information, it can also perform video frame recognition based on the characteristics of the incoming packet, and identify frame data packets belonging to the same video frame.
  • the network device may be a base station (base station), an evolved base station (evolved NodeB, eNodeB), a transmission reception point (transmission reception point, TRP), or a next generation base station (next generation NodeB, gNB) in a 5G system ), the next-generation base station in the 6G system, the base station in the future mobile communication system, or the access node in the WiFi system; it can also be a module or unit that completes some functions of the base station, for example, it can be a centralized unit (central unit, CU), or a distributed unit (DU).
  • the network device may be a macro base station, a micro base station or an indoor station, or a relay node or a donor node.
  • the functions of the network device in this application can also be realized by software functions running on hardware, or by virtualization functions instantiated on a platform (such as a cloud platform).
  • a platform such as a cloud platform.
  • the embodiment of the present application does not limit the specific technology and specific device form adopted by the network device.
  • a base station is used as an example of a network device for description below.
  • a terminal device may also be called a terminal, a user equipment (user equipment, UE), a mobile station, a mobile terminal, and the like.
  • Terminals can be widely used in various scenarios, such as device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), Internet of Things ( internet of things, IOT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grid, smart furniture, smart office, smart wearables, smart transportation, smart city, etc.
  • Terminals can be mobile phones, tablet computers, computers with wireless transceiver functions, wearable devices, vehicles, drones, helicopters, airplanes, ships, robots, robotic arms, smart home devices, etc.
  • the embodiment of the present application does not limit the specific technology and specific device form adopted by the terminal device.
  • Base stations and terminals can be fixed or mobile. Base stations and terminals can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed on aircraft, balloons and artificial satellites in the air. The embodiments of the present application do not limit the application scenarios of the base station and the terminal.
  • the communication between the base station and the terminal, between the base station and the base station, and between the terminal and the terminal can be carried out through the licensed spectrum, the communication can also be carried out through the unlicensed spectrum, and the communication can also be carried out through the licensed spectrum and the unlicensed spectrum at the same time; Communications may be performed on frequency spectrums below megahertz (gigahertz, GHz), or communications may be performed on frequency spectrums above 6 GHz, or communications may be performed using both frequency spectrums below 6 GHz and frequency spectrums above 6 GHz.
  • the embodiments of the present application do not limit the frequency spectrum resources used for wireless communication.
  • the functions of the base station may also be performed by a module (such as a chip) in the base station, or may be performed by a control subsystem including the functions of the base station.
  • the control subsystem including base station functions may be the control center in the application scenarios of the above-mentioned terminals such as smart grid, industrial control, intelligent transportation, and smart city.
  • the functions of the terminal may also be performed by a module (such as a chip or a modem) in the terminal, or may be performed by a device including the terminal function.
  • the base station sends downlink signals or downlink information to the terminal, and the downlink information is carried on a downlink channel;
  • the terminal sends an uplink signal or uplink information to the base station, and the uplink information is carried on an uplink channel.
  • Fig. 4-Fig. 7 show several system framework schematic diagrams applicable to the embodiment of the present application.
  • FIG. 4 shows a schematic diagram of a scenario where this embodiment of the present application is applicable.
  • FIG. 4 illustrates a system 400, including a server 401, a core network and an access network 402 (which may be referred to as a transport network 402 for short, such as an LTE, 5G or 6G network), and a terminal 403.
  • the server 401 can be used to encode, decode and render the XR source data
  • the core network and the access network 402 can be used to transmit the XR data
  • the terminal 403 can provide users with a variety of XR experiences by processing the XR data.
  • terminal 403 may be included between the core network and the access network 402 and the terminal 403, for example, other terminals (such as mobile phones, notebook computers, or vehicle terminals, etc.) and/or network equipment (such as relays) may also be included. equipment, integrated access backhaul (integrated access backhaul, IAB) equipment, WiFi router, or WiFi access point, etc.), the terminal 403 obtains XR data from the core network and the access network 402 by means of other terminals and/or network equipment .
  • terminals such as mobile phones, notebook computers, or vehicle terminals, etc.
  • network equipment such as relays
  • FIG. 5 shows another schematic diagram of a scene where this embodiment of the present application is applicable.
  • FIG. 5 illustrates a system 500 including a terminal 502 and other terminals 501 .
  • the other terminal 501 is a terminal other than the terminal 502 .
  • Other terminals 501 may transmit XR data to terminal 502 .
  • other terminals 501 can project XR data to the terminal 502 .
  • the other terminal 501 and terminal 502 are vehicle-mounted terminals, and XR data can be exchanged between the vehicle-mounted terminals.
  • other terminals 501 may also be connected to a transmission network (such as LTE, 5G or 6G network), so as to obtain XR data from the transmission network, or send data to the transmission network.
  • a transmission network such as LTE, 5G or 6G network
  • FIG. 6 shows another schematic diagram of a scene where this embodiment of the present application is applicable.
  • FIG. 6 illustrates a system 600 , including a terminal 603 , a WiFi router or a WiFi access point 602 (which may be referred to as a WiFi device 602 for short), and other terminals 601 .
  • the other terminal 601 is a terminal other than the terminal 603 .
  • Other terminals 601 can transmit XR data to the terminal 603 by means of a WiFi router or a WiFi access point 602 .
  • the other terminal 601 is a mobile phone device
  • the WiFi router or WiFi access point 602 is a WiFi router, WiFi access point or set-top box
  • the terminal 603 is a TV device, a smart screen device or an electronic tablet device. Access points or set-top boxes project XR data to TV devices, smart screen devices or electronic tablet devices to present to users.
  • FIG. 7 shows another schematic diagram of a scene where this embodiment of the present application is applicable.
  • FIG. 7 illustrates a system 700 , including a server 701 , a fixed network 702 , a WiFi router or a WiFi access point 703 (which may be referred to as a WiFi device 703 for short), and an extended reality XR terminal 704 .
  • the server 701 can be used to encode, decode and render the XR source data, and transmit the XR data to the extended reality XR terminal 704 by means of the fixed network 702 and the WiFi router or WiFi access point 703 .
  • the fixed network 702 is an operator network
  • the WiFi router or WiFi access point 703 is a WiFi router, WiFi access point or set-top box. screen to the extended reality XR terminal 704.
  • FIG. 4 to FIG. 7 only provide schematic illustrations of several applicable scenarios of the embodiment of the present application, and do not limit the applicable scenarios of the embodiment of the present application.
  • Embodiments disclosed in the application will present various aspects, embodiments or features of the application around a system including a plurality of devices, components, modules, and the like. It is to be understood and appreciated that the various systems may include additional devices, components, modules, etc. and/or may not include all of the devices, components, modules etc. discussed in connection with the figures. In addition, combinations of these schemes can also be used.
  • system and “network” in the embodiments of the present application may be used interchangeably.
  • “At least one” means one or more, and “plurality” means two or more.
  • “And/or” describes the association relationship of associated objects, indicating that there may be three types of relationships, for example, A and/or B, which may indicate: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the contextual objects are an “or” relationship.
  • “At least one of the following” or similar expressions refer to any combination of these items, including any combination of single or plural items. For example "at least one of A, B and C” includes A, B, C, AB, AC, BC or ABC.
  • VR is a technology that produces sound, images and other media that the human body can perceive through a head-mounted device. This technology can create a virtual world and give people an immersive experience.
  • AR refers to the augmentation of elements within the human eye's view of the real world through computer-generated sensory input.
  • Mobile phones, tablets, and head-mounted AR glasses are currently the most popular AR devices.
  • MR refers to a new visual environment generated after the fusion of real and virtual worlds, in which real entities and data entities coexist and can interact in real time. That is to say, the "images" are placed in the real space, and these "images” can interact with the familiar objects to a certain extent.
  • a key feature of MR is the ability to interact between synthetic and real objects in real time.
  • i the user to be scheduled
  • TBS i the spectrum efficiency of user i.
  • the MaxSe-based scheduling strategy means that when a network device is scheduling, when there are multiple users, the user combination with the largest sum of spectral efficiencies of the multiple users is selected for scheduling.
  • i the user to be scheduled
  • TBS i the spectrum efficiency of user i
  • Tput i the historical MAC layer data unit rate of user i.
  • the way to obtain the historical MAC layer data unit rate may be to obtain the average value of the throughput of user i from the start scheduling time to a specified time before the current scheduling time, or to carry out weighted average of the throughput by means of alpha filtering or the like, This embodiment is not limited.
  • the scheduling strategy based on MaxPF means that when the network device is scheduling, when there are multiple users, the user combination with the largest sum of the ratios of the spectrum efficiency of multiple users to the average MAC layer throughput is selected for scheduling.
  • XQI is a quality evaluation method for XR services on the radio access network (radio access network, RAN) side.
  • XQI can be implemented in various ways, including but not limited to the following:
  • XQI refers to the ratio of video frames received by the terminal device that can be correctly channel-decoded to the number of frames sent by the server. For example, XQI satisfies:
  • RxFrm represents the number of correctly channel-decoded video frames received by the terminal device
  • ⁇ t represents the duration of the XR video
  • FR represents the frame rate of the video frame. That is to say, XQI is the ratio of the number of application layer data units obtained by the terminal device through correct channel decoding to the number of application layer data units sent by the network device.
  • XQI refers to the proportion of frames correctly received and decoded by the terminal device to the number of frames sent by the server. For example, XQI satisfies:
  • DecodableFrm represents the number of frames correctly received and decoded by the terminal device
  • ⁇ t represents the duration of the XR video
  • FR represents the frame rate of the video frame.
  • XQI is the ratio of the number of application layer data units obtained by the terminal device through channel decoding and output through source decoding to the number of application layer data units sent by the network device.
  • Method C The network device side calculates XQI based on the average scheduling time of each video frame, and XQI satisfies:
  • mean() represents the average function
  • T frm represents the scheduling time of each frame.
  • the network device side can also calculate the XQI by using other functions for calculating the average value.
  • Mode D The network device calculates the XQI by the ratio of the video frames not exceeding the FDB in the scheduling time to the total sending frames. For example, XQI satisfies:
  • N frm represents the number of video frames that do not exceed FDB in the scheduling time
  • ⁇ t represents the XR video duration
  • FR represents the video frame rate
  • a cell satisfying users is defined as a user whose XQI is greater than the XQI threshold.
  • Satisfied user ratio is defined as the ratio of satisfied users in the cell to the total number of XR users served in the cell.
  • the maximum number of XR users per cell is defined as the maximum number of users in a cell when the user ratio is greater than a certain threshold (for example, 90%).
  • a certain threshold for example, 90%.
  • FIG. 8 is a schematic flowchart of a scheduling method provided by an embodiment of the present application.
  • the scheduling method may be executed by the network device, or by components of the network device (such as a processor, a chip, or a chip system, etc.), or may be implemented by a logic module or software that can realize all or part of the functions of the network device.
  • the implementation of the network device is taken as an example for description below.
  • the scheduling method includes the following steps:
  • the network device acquires the historical application layer data unit rate of the terminal device.
  • the network device acquires the historical application layer data unit rate of the terminal device, for example, updates the historical application layer data unit rate of the terminal device for the network device.
  • the network device updates the historical application layer data unit rate specifically, may update the historical application layer data unit rate according to the number of application layer data units that have been completely scheduled by the terminal device. For example, the greater the number of application layer data units that have been fully scheduled by the terminal device, the greater the rate of historical application layer data units; Small.
  • the application layer data unit that has been completely scheduled by the terminal device refers to a complete ADU that has been scheduled by the network device.
  • TTI transmission time interval
  • the number of application layer data units that have been fully scheduled may reflect the historical application layer data unit rate.
  • the historical application layer data unit rate is related to the number of application layer data units that the terminal device has been fully scheduled
  • the historical application layer data unit rate is the number of application layer data units that the terminal device has been fully scheduled within the specified time window quantity.
  • the specified time window may be a time window of fixed length.
  • the specified time window is a time window with a fixed time length a.
  • the historical application layer data unit rate is the number of complete application layer data units scheduled by the network device for the terminal device within a fixed time length a.
  • the specified time window may also be the time length from the time when the network device starts scheduling to the current moment.
  • the network device starts scheduling from time t0, and the current time is t1, then the time length of the specified time window is t1-t0, and the historical application layer data unit rate is from time t0 to time t1.
  • the historical application layer data unit rate is not only related to the number of fully scheduled application layer data units of the terminal device, but also related to the scheduling delay corresponding to the fully scheduled application layer data units of the terminal device.
  • the scheduling delay corresponding to the application layer data unit that has been completely scheduled by the terminal device is the time from when the network device starts scheduling the first frame data packet of the application layer data unit to finishing scheduling the last frame data packet of the application layer data unit .
  • the application layer data unit A is split into frame data packet 1, frame data packet 2, and frame data packet 3 during the scheduling process, then the scheduling delay corresponding to the application layer data unit that has been completely scheduled by the terminal device is The time from when the device starts scheduling frame packet 1 to when it finishes scheduling frame packet 3.
  • the network device may also obtain the identifier of the MAC layer data unit, and determine the application layer data unit corresponding to the MAC layer data unit according to the identifier of the MAC layer data unit .
  • the application layer data unit is a basic unit of data transmitted by the application layer when the network device schedules. For example, when the XR service scheduled by the network device is a video service, one application layer data unit is one video frame.
  • the MAC layer data unit is the basic unit of data transmitted by the MAC layer when the network device is scheduling.
  • the application layer data unit is transmitted to the MAC layer, it is split into multiple MAC layer data units for transmission.
  • the XR service scheduled by the network device is a video service
  • one MAC layer data unit is one frame data packet.
  • the video frame is transmitted to the MAC layer, it is split into multiple frame data packets.
  • the network device can obtain and parse the media information transmitted by the core network through the GTP-U.
  • the media information includes identifiers (such as sequence numbers) of MAC layer data units belonging to the same application layer data unit. Therefore, after the network device acquires and parses the media information, it can determine which MAC layer data units belong to the same ADU. It can be seen that before the network device obtains the historical application layer data unit rate of the terminal device, it can obtain the media information of the application layer, and the media information of the application layer includes the respective identifiers of multiple MAC layer data units. According to the identifier of the MAC layer data unit, the application layer data unit corresponding to the MAC layer data unit can be determined.
  • the MAC layer can obtain relevant information of the application layer during scheduling through the identification of the MAC layer data unit, which is beneficial to network device scheduling
  • priority is given to scheduling MAC layer data units belonging to the same ADU (or understood as priority to scheduling a complete ADU), which can prevent a large number of transmitted MAC layer data units from being unable to form a complete ADU, thereby reducing the waste of air interface resources.
  • FIG. 9 is a schematic diagram of an application layer data unit and a MAC layer data unit corresponding to the application layer data unit according to an embodiment of the present application.
  • 9 is described by taking two application layer data units (such as two video frames) as an example, and the two application layer data units (video frames) are respectively application layer data unit A and application layer data unit B (video frame A and video frame frame B).
  • the application layer data unit A is split into 60 MAC layer data units during MAC layer transmission, and the sequence number of each MAC layer data unit is 1-60;
  • the application layer data unit B is split into 60 during MAC layer transmission
  • the network device acquires and parses the media information, and determines that the MAC layer data units with sequence numbers 1-60 belong to the same application layer data unit A, and the MAC layer data units with sequence numbers 61-132 belong to the same application layer data unit B.
  • the network device schedules the MAC layer data unit at the MAC layer, when it detects that the sequence number of the scheduled MAC layer data unit is any sequence number in 1-60, the network device will preferentially schedule other sequence numbers in 1-60
  • the MAC layer data unit of the serial number is used to ensure that the data of the application layer data unit A is transmitted first and completely to avoid waste of resources.
  • the network device schedules the MAC layer data unit at the MAC layer, when it detects that the sequence number of the scheduled MAC layer data unit is any sequence number in 61-132, the network device will preferentially schedule the sequence number as 61-132.
  • the MAC layer data units with other serial numbers in 132 are used to ensure that the data of the application layer data unit B is preferentially and completely transmitted.
  • the network device determines the scheduling coefficient of the terminal device according to the historical application layer data unit rate.
  • the network device determines the scheduling coefficient of the terminal device according to the historical application layer data unit rate and the instantaneous MAC layer data unit rate.
  • the instantaneous MAC layer data unit rate is determined according to the spectrum efficiency of the terminal equipment.
  • the instantaneous MAC layer data unit rate is equal to the spectral efficiency of the terminal equipment multiplied by the number of time-frequency resources of one RB.
  • the instantaneous MAC layer data unit rate can be understood as the maximum transport block (transport block, TB) size that can be carried by a resource block (resource block, RB) allocated to a terminal device.
  • the scheduling coefficient of the terminal device satisfies:
  • AppPf represents the scheduling coefficient
  • dTbs represents the instantaneous MAC layer data unit rate
  • dHistFrmThp represents the historical application layer data unit rate of the terminal device
  • ⁇ represents the first adjustment coefficient, which satisfies 0 ⁇ 1.
  • ⁇ is used for The results are normalized, so that the value of the scheduling coefficient is in a reasonable value range.
  • network devices schedule terminal devices based on the scheduling coefficient AppPf calculated by formula (7).
  • this method introduces the rate of historical application layer data units, so under the same dTbs , the scheduler tends to preferentially schedule terminal devices with fewer application layer data units that have been completely scheduled, thus ensuring ADU-based application layer fairness.
  • the scheduler tends to prioritize the scheduling of terminal devices that have not yet completed the complete ADU transmission in multiple TTIs, so that while considering the instantaneous channel conditions, the integrity of the ADU is guaranteed, and the number of failures due to incomplete ADU data can be reduced. The resulting waste of resources.
  • the network device determines the scheduling coefficient of the terminal device according to the historical application layer data unit rate and the instantaneous application layer data unit rate.
  • the instantaneous application layer data unit rate is determined according to one or more instantaneous MAC layer data unit rates corresponding to the application layer data unit currently being scheduled in the scheduled period.
  • the scheduled time period is a time period corresponding to the start scheduling time corresponding to the application layer data unit being scheduled to the current scheduling time.
  • the scheduling coefficient of the terminal device satisfies:
  • AppPf represents the scheduling coefficient
  • dFrmTbs represents the instantaneous application layer data unit rate
  • dHistFrmThp represents the historical application layer data unit rate
  • ⁇ represents the second adjustment coefficient, which satisfies 0 ⁇ 1.
  • the determination method of the instantaneous application layer data unit rate includes but not limited to the following implementation methods:
  • Embodiment 1 The instantaneous application layer data unit rate is determined according to the instantaneous MAC layer data unit rate sequence of the application layer data unit being scheduled in the scheduled period.
  • the instantaneous MAC layer data unit rate sequence includes the instantaneous MAC layer data unit rate at each scheduling time from the start scheduling time corresponding to the application layer data unit being scheduled to the current scheduling time.
  • the network device determines the instantaneous application layer data unit rate dFrmTbs according to the instantaneous MAC layer data unit rate sequence vdTbs from the scheduling start time to the current scheduling time.
  • the instantaneous application layer data unit rate dFrmTbs satisfies:
  • vdTbs(j) represents the instantaneous MAC layer data unit rate corresponding to time j
  • t 0 represents the start scheduling time corresponding to the application layer data unit being scheduled
  • t represents the current scheduling time
  • Embodiment 2 The instantaneous application layer data unit rate is determined according to the historical MAC layer data unit rate sequence from the start scheduling time to the first scheduling time corresponding to the application layer data unit being scheduled and the instantaneous MAC layer data unit rate at the current scheduling time of.
  • the first scheduling time is a scheduling time before the current scheduling time
  • the historical MAC layer data unit rate sequence includes the instantaneous MAC layer data unit rate at each scheduling time from the start scheduling time to the first scheduling time.
  • the network device determines the instantaneous application layer data unit rate dFrmTbs according to the instantaneous MAC layer data unit rate sequence vdTbs from the start scheduling time to the first scheduling time and the instantaneous MAC layer data unit rate at the current scheduling time.
  • the instantaneous application layer data unit rate dFrmTbs satisfies:
  • t 0 represents the start scheduling time corresponding to the application layer data unit being scheduled
  • tn represents the first scheduling time
  • vdTbs(t) represents the instantaneous MAC layer data unit rate at the current scheduling time t
  • M is a normalization parameter, and M is a positive integer, which is used to Perform normalization.
  • network devices schedule terminal devices based on the scheduling coefficient AppPf determined by formula (8).
  • this method introduces the instantaneous application layer data unit rate. The greater the rate of one or more instantaneous MAC layer data units corresponding to the application layer data unit being scheduled in the scheduled period, or the greater the transmitted transport block corresponding to the application layer data unit being scheduled, the priority higher.
  • the terminal equipment maintains a higher priority to participate in the scheduling, thereby improving the transmission integrity of the application layer data unit, which is conducive to reducing the waste of air interface resources caused by incomplete transmission of the application layer data unit, and thus improving the maximum supported by each cell. Number of XR users.
  • the scheduling coefficient is also related to the evaluation coefficient, and the evaluation coefficient is used to indicate the service quality of the application layer service.
  • the evaluation coefficient in this embodiment of the present application may be XQI, or other evaluation coefficients for evaluating XR services, which is not limited in this embodiment.
  • the evaluation coefficient is determined according to one or more of the following: the number of application layer data units successfully received by the terminal device, the number of application layer data units that have been sent, and the scheduling of application layer data units that have been fully scheduled Duration or frame delay budget FDB.
  • the calculation method of XQI may refer to the method A to the method E described in the foregoing embodiments.
  • the evaluation coefficient XQI satisfies:
  • RxFrm represents the number of video frames received by the terminal device that can be correctly channel-decoded
  • ⁇ t represents the XR video duration
  • FR represents the video frame rate.
  • the XQI can be calculated through similar modifications, which will not be repeated here.
  • the scheduling coefficient is related to the impact factor of the evaluation coefficient.
  • the impact factor of the evaluation coefficient satisfies:
  • g(XQI) represents the impact factor of the evaluation coefficient XQI
  • XQI target represents the XQI threshold that the terminal device needs to meet
  • h(XQI, XQI target ) represents a function related to the evaluation coefficient XQI and the XQI threshold.
  • g(XQI) may include but not limited to the following two ways:
  • the value of ⁇ is 0.001, and the value of ⁇ is 1. That is to say, when XQI ⁇ XQI target (that is, when the user experience is satisfied), the value of the impact factor of the evaluation coefficient is 0.001, that is, the impact factor of the evaluation coefficient is very small. When XQI ⁇ XQI target (that is, when the user experience is not satisfied), the value of the impact factor of the evaluation coefficient is 1.
  • the value of the impact factor of the evaluation coefficient is close to 0; when the XQI is less than or equal to the value of the XQI target , the value of the impact factor of the evaluation coefficient is greater than 1 or equal to 1.
  • the scheduling coefficient of the terminal device satisfies:
  • the scheduling coefficient of the terminal device satisfies:
  • network devices schedule terminal devices based on the scheduling coefficients calculated by the above formulas (13)-(16).
  • this method consider User experience evaluation indicators (such as XQI) are introduced. Among them, the terminal equipment that has reached the XQI threshold will be lowered in scheduling priority, and if the terminal equipment below the XQI threshold has data to be scheduled, the terminal equipment will be scheduled first, which will help increase the proportion of users reaching the XQI threshold The maximum number of XR users that a cell can support.
  • User experience evaluation indicators such as XQI
  • the network device schedules the terminal device according to the scheduling coefficient.
  • the network device may schedule the terminal device to perform uplink data transmission or downlink data transmission according to the scheduling coefficient. For example, when a terminal device needs to access a media server, the network device schedules the terminal device to perform uplink data transmission according to a scheduling factor. When the network side acquires data from the media server, the network device sends downlink data to the terminal device according to the scheduling coefficient.
  • the network device updates the historical application layer data unit rate.
  • the network device can update the historical application layer data unit rate in but not limited to the following two ways:
  • Method A The network device updates the historical application layer data unit rate according to the filter coefficient and the size of the MAC layer data unit corresponding to the application layer data unit currently being scheduled.
  • the rate of the historical application layer data unit satisfies:
  • dHistFrmThp t represents the updated historical application layer data unit rate
  • dHistFrmThp tn represents the historical application layer data unit rate before updating
  • FrmTBSize represents the size of the MAC layer data unit corresponding to the application layer data unit currently being scheduled
  • ⁇ is Filter coefficient, 0 ⁇ 1.
  • the filter coefficient reflects the length of the filter time window used for filtering, that is, the size of the filter coefficient ⁇ is related to the scheduling delay corresponding to the application layer data unit that has been completely scheduled by the terminal device.
  • the scheduling delay corresponding to the application layer data unit that has been completely scheduled by the terminal device is relatively large (for example, when the application layer data unit is fully scheduled, it will experience more TTIs), and the filter coefficient is close to 0 at this time, then The historical application layer data unit rate will be reduced.
  • the scheduling coefficient will increase, and the network device can preferentially schedule the MAC layer data unit corresponding to the application layer data unit of the terminal device.
  • the scheduling delay corresponding to the application layer data unit that has been completely scheduled by the terminal device is small (for example, when the application layer data unit is fully scheduled, it needs to experience fewer TTIs), and the filter coefficient is close to 1 at this time, then the historical application layer The data unit rate will increase.
  • the scheduling coefficient will decrease, and the network device will lower the priority of the terminal device to participate in the scheduling.
  • the rate of the historical application layer data unit satisfies:
  • dHistFrmThp t represents the historical application layer data unit rate after updating
  • dHistFrmThp tn represents the historical application layer data unit rate before updating. That is to say, when multiple MAC layer data units corresponding to the currently scheduled application layer data unit have not been completely scheduled, since 0 ⁇ 1, the network device will reduce the historical application layer data unit rate.
  • the scheduling coefficient will increase, so that the network device preferentially schedules the MAC layer data unit corresponding to the application layer data unit of the terminal device, which is conducive to ensuring the integrity of the application layer data unit, and reduces the problem caused by only transmitting complete application layer data units.
  • the air interface resources are wasted due to some MAC layer data units, which can increase the maximum number of XR users supported by each cell.
  • Way B The network device updates the historical application layer data unit rate according to the adjustment amount of the historical application layer data unit rate.
  • the rate of the historical application layer data unit satisfies:
  • dHistFrmThp t represents the updated historical application layer data unit rate
  • dHistFrmThp tn represents the historical application layer data unit rate before update
  • C represents the adjustment amount of the historical application layer data unit rate, which is used to normalize dHistFrmThp tn , so that the updated historical application layer data unit rate is within a reasonable value range.
  • the value of C is a positive integer. That is to say, when the multiple MAC layer data units corresponding to the application layer data unit currently being scheduled have been fully scheduled, the historical application layer data unit rate will increase.
  • the scheduling coefficient will decrease, and the network device will lower the priority of the terminal device to participate in the scheduling.
  • the rate of the historical application layer data unit satisfies:
  • dHistFrmThp t represents the historical application layer data unit rate after updating
  • dHistFrmThp tn represents the historical application layer data unit rate before updating. That is to say, when multiple MAC layer data units corresponding to the currently scheduled application layer data unit have not been fully scheduled, the rate of the historical application layer data unit can remain unchanged, that is, the terminal device continues to participate with a higher degree of participation. scheduling. Therefore, the integrity of the data unit of the application layer is guaranteed, and the maximum number of XR users supported by each cell can be increased.
  • the network device may also perform multi-user pairing based on the scheduling coefficients of each terminal device to further optimize the scheduling strategy. Specifically, assuming that there are M terminal devices in the network, the network device determines N terminal devices corresponding to the maximum sum of the scheduling coefficients, and performs multi-user pairing on the N terminal devices. Wherein, both M and N are positive integers, and M ⁇ N.
  • the network device determines the AppPf of two terminal devices (terminal device A and terminal device B) according to formula (7), and obtains AppPf#1 and AppPf#2.
  • terminal device C When terminal device C also accesses the cell for communication, it may cause interference to terminal device A and/or terminal device B, which may reduce the signal to interference plus noise ratio (signal to interference plus noise ratio) of terminal device A and/or terminal device B. noise ratio, SINR).
  • SINR noise ratio
  • the instantaneous MAC layer data unit rate dTbs is determined according to the spectrum efficiency of the terminal equipment, and the spectrum efficiency of the terminal equipment is related to the SINR.
  • dTbs respectively corresponding to the terminal device A and/or the terminal device B will also decrease.
  • the AppPf of the terminal device A when the dTbs of the terminal device A decreases, the AppPf of the terminal device A also decreases, for example, becomes AppPf#1', and AppPf#1' ⁇ AppPf#1.
  • the AppPf of the terminal device C is denoted as AppPf#3.
  • the value of AppPf#1+AppPf#2 may be larger than AppPf#1'+AppPf#2'+AppPf#3, or smaller than AppPf#1'+AppPf#2'+AppPf#3.
  • AppPf#1+AppPf#2>AppPf#1'+AppPf#2'+AppPf#3 the network device performs multi-user pairing of terminal device A and terminal device B, and preferentially schedules terminal device A and terminal device B.
  • the network device performs multi-user pairing of terminal device A, terminal device B and terminal device C, and prioritizes scheduling terminal device A , terminal device B and terminal device C.
  • the historical application layer data unit rate when the network device determines the scheduling coefficient of the terminal device, the historical application layer data unit rate is introduced, and the historical application layer data unit rate reflects the number of application layer data units that the terminal device has been completely scheduled.
  • NR preferentially schedules terminal devices with fewer application layer data units that have been completely scheduled, thereby ensuring the fairness of the application layer.
  • the embodiment of the present application also introduces the instantaneous application layer data unit rate when calculating the scheduling coefficient.
  • the terminal device can maintain a higher priority to participate in the scheduling, thereby ensuring the application layer data rate.
  • the integrity of the data unit is beneficial to increase the maximum number of XR users that each cell can support.
  • Fig. 10 is another scheduling method provided by the embodiment of the present application.
  • the scheduling method may be executed by the network device, or by components of the network device (such as a processor, a chip, or a chip system, etc.), or may be implemented by a logic module or software that can realize all or part of the functions of the network device.
  • the implementation of the network device is taken as an example for description below.
  • the scheduling method includes the following steps:
  • the network device obtains the instantaneous MAC layer data unit rate of the terminal device.
  • the instantaneous MAC layer data unit rate is determined according to the spectrum efficiency of the terminal device. For a specific implementation manner, reference may be made to the corresponding description in step 802, which will not be repeated here.
  • the network device may also acquire the historical MAC layer data unit rate of the terminal device.
  • the historical MAC layer data unit rate is related to the number of MAC layer data units that have been fully scheduled by the terminal device. Specifically, the historical MAC layer data unit rate is determined according to the number of scheduled MAC layer data units from the scheduling start time to the first scheduling time in the scheduled period.
  • the data unit rate of the historical MAC layer refer to the description of Tput i above, which will not be repeated here.
  • the network device determines the scheduling coefficient of the terminal device according to the instantaneous MAC layer data unit rate and evaluation coefficient.
  • the evaluation coefficient (such as XQI) is used to indicate the service quality of the application layer service.
  • the influence factor g(XQI) of the evaluation coefficient reference may be made to the corresponding description in step 802 in the embodiment of FIG. 8 , which will not be repeated here.
  • the network device determines that the scheduling coefficient of the terminal device satisfies:
  • AppPf represents the scheduling coefficient
  • TBS i represents the spectrum efficiency of terminal device i
  • g(XQI) represents the influencing factor of the evaluation coefficient.
  • the network device determines that the scheduling coefficient satisfies:
  • AppPf represents the scheduling coefficient
  • TBS i represents the spectral efficiency of terminal device i
  • Tput i (t-1) represents the historical MAC layer data unit rate
  • g(XQI) represents the impact factor of the evaluation coefficient.
  • the evaluation coefficient XQI is introduced into the scheduling strategy.
  • the network device can perform proportional fair scheduling at the application layer according to the user experience evaluation coefficient XQI on the network side, which is conducive to increasing the proportion of users who reach the XQI threshold. , which is beneficial to increase the maximum number of XR users that each cell can support.
  • the network device schedules the terminal device according to the scheduling coefficient.
  • the network device may schedule the terminal device to perform uplink data transmission or downlink data transmission according to the scheduling coefficient. For example, when a terminal device needs to access a media server, the network device schedules the terminal device to perform uplink data transmission according to a scheduling factor. When the network side acquires data from the media server, the network device sends downlink data to the terminal device according to the scheduling coefficient.
  • the network device may also perform multi-user pairing based on the scheduling coefficients of each terminal device to further optimize the scheduling strategy. Specifically, assuming that there are M terminal devices in the network, the network device determines N terminal devices corresponding to the maximum sum of the scheduling coefficients, and performs multi-user pairing on the N terminal devices. For a specific implementation manner, reference may be made to the corresponding description in step 803 in the embodiment of FIG. 8 , and details are not repeated here.
  • the influence factor of the evaluation coefficient is introduced, which is beneficial to ensure the fairness of user experience, and at the same time increase the maximum number of XR users that can be supported by each cell.
  • the network device schedules the terminal devices based on the scheduling coefficient calculated by the above formula (21) or (22). Compared with the current scheduling strategy based on MaxSe and MaxPF, this method introduces XQI. Through the calculation of the XQI on the RAN side, the network device may lower the scheduling priority of the terminal device for which the XQI threshold has been reached.
  • the network device When there is a terminal device that does not reach the XQI threshold, and the terminal device has data to be scheduled, the network device prioritizes the scheduling of the terminal device. Optionally, in this manner, when all terminal devices have reached the XQI threshold, the network device may also preferentially schedule terminal devices with good channel conditions according to channel conditions.
  • the scope of application of the scheduling method in the foregoing embodiments includes but is not limited to XR services, traditional streaming media transmission services, voice services, and the like.
  • the network device provided in the embodiment of the present application may include a hardware structure and/or a software module, and implement the above in the form of a hardware structure, a software module, or a hardware structure plus a software module.
  • various functions Whether one of the above-mentioned functions is executed in the form of a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraints of the technical solution.
  • each functional module in each embodiment of the present application can be integrated into a processing In the controller, it can also be physically present separately, 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 in the form of software function modules.
  • FIG. 11 is a communication device 1100 provided by an embodiment of the present application, which is used to realize the functions of the network device in the foregoing method embodiments.
  • the device may be a network device, or a device in the network device, or a device that can be matched with the network device. Wherein, the device may be a system on a chip.
  • the communications apparatus 1100 includes at least one processor 1102, configured to implement the functions of the network device in the method provided by the embodiment of the present application.
  • the processor 1102 may determine the scheduling coefficient of the terminal device according to the historical application layer data unit rate. For details, refer to the detailed description in the method example, which will not be repeated here.
  • the apparatus 1100 may also include at least one memory 1103 for storing program instructions and/or data.
  • the memory 1103 is coupled to the processor 1102 .
  • the coupling in the embodiments of the present application is an indirect coupling or a communication connection between devices, units or modules, which may be in electrical, mechanical or other forms, and is used for information exchange between devices, units or modules.
  • Processor 1102 may cooperate with memory 1103 .
  • Processor 1102 may execute program instructions stored in memory 1103 . At least one of the at least one memory may be included in the processor.
  • the device 1100 may further include a communication interface 1101, which may be, for example, a transceiver, an interface, a bus, a circuit, or a device capable of implementing a sending and receiving function.
  • the communication interface 1101 is used to communicate with other devices through a transmission medium, so that the devices used in the device 1100 can communicate with other devices.
  • the other device may be a terminal.
  • the processor 1102 uses the communication interface 1101 to send and receive data, and is used to implement the method performed by the network device described in the embodiments corresponding to FIG. 8 and FIG. 10 .
  • a specific connection medium among the communication interface 1101, the processor 1102, and the memory 1103 is not limited.
  • the memory 1103, the processor 1102, and the communication interface 1101 are connected through the bus 1104.
  • the bus is represented by a thick line in FIG. 11, and the connection between other components is only for schematic illustration. , is not limited.
  • the bus can be divided into address bus, data bus, control bus and so on. For ease of representation, only one thick line is used in FIG. 11 , but it does not mean that there is only one bus or one type of bus.
  • the processor may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, and may implement or Execute the methods, steps and logic block diagrams disclosed in the embodiments of the present application.
  • a general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the methods disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor.
  • the memory may be a non-volatile memory, such as a hard disk (hard disk drive, HDD) or a solid-state drive (solid-state drive, SSD), etc., and may also be a volatile memory (volatile memory), such as Random-access memory (RAM).
  • a memory is, but is not limited to, any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.
  • the memory in the embodiment of the present application may also be a circuit or any other device capable of implementing a storage function, and is used for storing program instructions and/or data.
  • FIG. 12 shows another communication device 1200 provided by the embodiment of the present application.
  • the communication device may be a network device, or a device in the network device, or a device that can be matched with the network device.
  • the communication device may include a one-to-one corresponding module for executing the methods/operations/steps/actions described in the examples corresponding to FIG. 8 and FIG. It is realized by combining hardware circuit and software.
  • the device may include a processing unit 1201 and an interface unit 1202 . Exemplarily, the processing unit 1201 is used for:
  • the historical application layer data unit rate of the terminal device is related to the number of application layer data units that have been fully scheduled by the terminal device;
  • the terminal equipment is scheduled according to the scheduling coefficient.
  • the processing unit 1201 is configured to determine the scheduling coefficient of the terminal device according to the historical application layer data unit rate, including:
  • the scheduling coefficient of the terminal equipment is determined.
  • the processing unit 1201 is configured to determine the scheduling coefficient of the terminal device according to the historical application layer data unit rate, including:
  • the scheduling coefficient of the terminal equipment is determined.
  • the instantaneous application layer data unit rate is determined according to one or more instantaneous MAC layer data unit rates corresponding to the application layer data unit currently being scheduled in the scheduled period.
  • the scheduled time period is a time period corresponding to the scheduling start time corresponding to the application layer data unit being scheduled to the current scheduling time.
  • the scheduling coefficient satisfies:
  • AppPf represents the scheduling coefficient
  • dTbs represents the instantaneous MAC layer data unit rate
  • dHistFrmThp represents the historical application layer data unit rate
  • ⁇ is the first adjustment coefficient, which satisfies 0 ⁇ 1.
  • the scheduling coefficient satisfies:
  • AppPf represents the scheduling coefficient
  • dFrmTbs represents the instantaneous application layer data unit rate
  • dHistFrmThp represents the historical application layer data unit rate
  • ⁇ is the second adjustment coefficient, which satisfies 0 ⁇ 1.
  • the scheduling coefficient is also related to the evaluation coefficient, and the evaluation coefficient is used to indicate the service quality of the application layer service.
  • processing unit 1201 is used for:
  • the MAC layer data unit rate and evaluation coefficient determine the scheduling coefficient of the terminal equipment; wherein, the evaluation coefficient is used to indicate the service quality of the application layer business;
  • the terminal equipment is scheduled according to the scheduling coefficient.
  • the processing unit 1201 is configured to determine the scheduling coefficient of the terminal device according to the rate of the MAC layer data unit and the evaluation coefficient, including:
  • the scheduling coefficient of the terminal equipment is determined.
  • the processing unit 1201 is configured to determine the scheduling coefficient of the terminal device according to the rate of the MAC layer data unit and the evaluation coefficient, including:
  • the processing unit 1201 is configured to determine the scheduling coefficient of the terminal device according to the rate of the MAC layer data unit and the evaluation coefficient, including:
  • the scheduling coefficient of the terminal equipment is determined.
  • the evaluation coefficient is determined according to one or more of the following: the number of application layer data units successfully received by the terminal device, the number of application layer data units that have been sent, and the scheduling of application layer data units that have been fully scheduled Duration or frame delay budget FDB.
  • the interface unit 1202 is configured to receive indication information from the terminal device, where the indication information indicates the number of application layer data units successfully received by the terminal device.
  • the historical application layer data unit rate is also related to the scheduling delay corresponding to the application layer data units that have been completely scheduled by the terminal device.
  • the instantaneous MAC layer data unit rate is determined according to the maximum transport block size carried by resource blocks allocated to the terminal device, or the instantaneous MAC layer data unit rate is determined according to the spectrum efficiency of the terminal device at the current moment.
  • the processing unit 1201 is configured to obtain the identifier of the MAC layer data unit before obtaining the historical application layer data unit rate of the terminal device, and determine the application layer data unit corresponding to the MAC layer data unit according to the identifier of the MAC layer data unit .
  • the processing unit 1201 is configured to update the historical application layer data unit rate when multiple MAC layer data units corresponding to the currently scheduled application layer data unit have been fully scheduled.
  • the technical solutions provided by the embodiments of the present application may be fully or partially implemented by software, hardware, firmware or any combination thereof.
  • software When implemented using software, it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions.
  • the computer program instructions When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part.
  • the computer may be a general computer, a special computer, a computer network, a network device, a terminal device or other programmable devices.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Transmission to another website site, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.).
  • the computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center integrated with one or more available media.
  • the available medium may be a magnetic medium (for example, a floppy disk, a hard disk, or a magnetic tape), an optical medium (for example, a digital video disc (digital video disc, DVD)), or a semiconductor medium.
  • the various embodiments may refer to each other, for example, the methods and/or terms between the method embodiments may refer to each other, such as the functions and/or terms between the device embodiments Or terms may refer to each other, for example, functions and/or terms between the apparatus embodiment and the method embodiment may refer to each other.

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

Abstract

La présente demande concerne un procédé de programmation et un appareil de communication. Le procédé consiste : à acquérir, par un dispositif de réseau, un débit d'unités de données de couche d'application historique d'un dispositif de terminal et à déterminer un coefficient de programmation du dispositif de terminal en fonction du débit d'unités de données de couche d'application historique ; puis à programmer le dispositif terminal en fonction du coefficient de programmation. Par conséquent, un dispositif de réseau détermine une politique de programmation sur la base d'une équité proportionnelle de couche d'application en fonction d'un débit d'unités de données de couche d'application historique, ce qui permet d'assurer l'équité de la programmation de la couche d'application et d'améliorer le nombre maximum d'utilisateurs de réalité augmentée (XR) qui peuvent être pris en charge par chaque cellule.
PCT/CN2022/115596 2021-09-27 2022-08-29 Procédé de programmation et appareil de communication WO2023045714A1 (fr)

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