CN113316005A - Method for adjusting video code rate and communication system - Google Patents
Method for adjusting video code rate and communication system Download PDFInfo
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- 238000004891 communication Methods 0.000 title claims abstract description 11
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
- H04N21/2662—Controlling the complexity of the video stream, e.g. by scaling the resolution or bitrate of the video stream based on the client capabilities
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
- H04N21/440281—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display by altering the temporal resolution, e.g. by frame skipping
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
- H04N21/462—Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
- H04N21/4621—Controlling the complexity of the content stream or additional data, e.g. lowering the resolution or bit-rate of the video stream for a mobile client with a small screen
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/18—Negotiating wireless communication parameters
- H04W28/22—Negotiating communication rate
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/24—Negotiating SLA [Service Level Agreement]; Negotiating QoS [Quality of Service]
Abstract
The present specification provides a method and a communication system for adjusting a video bitrate, wherein the method comprises the following steps: sending a first subscription message to a 5G core network device, wherein the first subscription message carries a user identifier of a mobile terminal, a service attribute of a video to be downloaded and a target rate threshold, receiving an admission notification sent by the 5G core network device, wherein the admission notification carries a judgment result of whether the rate of downloading the video from a video server by the mobile terminal meets the target rate threshold and the target rate threshold, if the judgment result is that the rate meets the target rate threshold, adjusting the video code rate to a target code rate corresponding to the target rate threshold, and if the judgment result is that the rate does not meet the target rate threshold, adjusting the video code rate to a target code rate corresponding to a first rate threshold lower than the target rate threshold. By the method, the code rate can be accurately and timely adjusted, network congestion is avoided, and the QoE of the user is improved.
Description
Technical Field
The present disclosure relates to the field of wireless communications, and in particular, to a method and a communication system for adjusting a video bitrate.
Background
Video code rate: it is the data flow rate used by a video file per unit time, and is the most important part in picture quality control in video coding. Under the same resolution, the larger the code rate of the video file is, the smaller the compression ratio is, and the better the picture quality is.
NEF: the device opens the Network capability of the 5G Network to a third-party server.
AMF: the Access and Mobility Management Function, Mobility Management device in the 5G network, is responsible for Access, connection, Mobility Management, etc. of the mobile terminal.
SMF: session Management Function, Session Management equipment in the 5G core network, is responsible for Session establishment/modification/release of the mobile terminal, IP address allocation and Management of the mobile terminal, configuration of user plane data routing, and the like.
Internet video services occupy a considerable share of the current network bandwidth, and rate adaptation is recognized as one of the most effective means for overcoming unnecessary playing jams caused by network fluctuations. An Adaptive Bitrate Streaming (ABR) is a video transmission technology in which the video Bitrate can be automatically adjusted according to the network condition or the client playing buffer condition. The code rate self-adaption technical characteristics are as follows: a video source is converted into different video code rates by a video transcoder and stored on a video server, meanwhile, the video with each code rate is divided into small video fragments, and each fragment is video content which can be decoded and played independently. The video playing client firstly acquires the fragment index information with different code rates, and then automatically selects the video fragment with the most matched code rate to download and play according to the current network condition or the playing buffer condition of the client.
The existing code rate adaptive algorithm can be mainly divided into three categories: one is to determine the code rate of the next segment based on the predicted throughput, and the main idea of this method is that the video playing client predicts the future network bandwidth through the throughput during the historical video segment downloading, and then uses it to determine the video code rate of the next segment; the other type is that the video playing client determines the code rate of the next fragment according to the situation of the playing buffer area of the client (if the video duration in the playing buffer area is greater than a certain threshold, the code rate is increased, otherwise, the code rate is decreased); the third category is a hybrid of the two algorithms.
Compared with a wired network, the mobile network has greater volatility, and when online playing of videos by using a mobile terminal (such as a mobile phone) encounters large network signal fluctuation, the problem of video "jamming" is more obvious, which greatly affects the quality of user experience qoe (quality of experience). The existing code rate self-adaptive algorithm mainly relies on historical information for prediction, and the characteristic that a wireless channel has quick time variation is not effectively utilized, so that the prediction accuracy of the network bandwidth is limited, and finally, the adjustment of the code rate has hysteresis.
Disclosure of Invention
The method can adjust the video code rate by utilizing the direct perception of a base station in a mobile network on wireless bandwidth resources and the wireless channel quality of a mobile terminal, can accurately and timely adjust the code rate, avoids network congestion and further improves the QoE of a user.
The embodiment of the disclosure provides a method for adjusting video code rate, which is applied to a video server, wherein the video server is connected with a mobile terminal, and is connected with a 5G core network device, and the method comprises the following steps:
sending a first subscription message to a 5G core network device, wherein the first subscription message carries a user identifier of a mobile terminal, a service attribute of a video to be downloaded and a target rate threshold, so that the 5G core network device determines whether the rate of downloading the video from a video server by the mobile terminal meets the target rate threshold according to the first subscription message and the network state of the mobile terminal;
receiving an admission notification sent by 5G core network equipment, wherein the admission notification carries a judgment result of whether the rate of downloading videos from a video server by the mobile terminal meets a target rate threshold or not and the target rate threshold;
if the judgment result is satisfied, adjusting the video code rate to a target code rate corresponding to the target rate threshold;
and if the judgment result is that the video code rate does not meet the requirement, adjusting the video code rate to a target code rate corresponding to a first rate threshold lower than the target rate threshold.
Optionally, the sending the first subscription message to the 5G core network device specifically includes:
and sending a first subscription message to a network open function (NEF) in the 5G core network equipment.
Optionally, the carrying of the user identifier of the mobile terminal in the first subscription message includes:
the user identification comprises address information of the mobile terminal.
By the method, the video server interacts with the 5G core network equipment, so that the rate support condition of the mobile terminal which wants to download the video from the video server in the 5G network can be obtained, and the code rate of the video downloaded by the mobile equipment can be adjusted.
The embodiment of the present disclosure further provides a method for adjusting a video bitrate, where the method is applied to a 5G core network device, the 5G core network device is connected to a video server through a network open function NEF, and the method includes:
receiving a first subscription message sent by a video server, wherein the first subscription message carries a user identifier of a mobile terminal, a service attribute of a video to be downloaded and a target rate threshold;
according to the first subscription message, sending a second subscription message to the base station, so that the base station determines whether the rate of downloading the video to be downloaded from the video server by the mobile terminal meets a target rate threshold or not according to the second subscription message;
sending an admission notification to a video server so that the video server adjusts the code rate of a video to be downloaded according to the admission notification;
and the base station determines whether the rate of downloading the video to be downloaded from the video server by the mobile terminal meets the judgment result of the target rate threshold or not according to the second subscription message and the target rate threshold.
Optionally, the service attribute of the video to be downloaded includes: quintuple information of the video to be downloaded.
Optionally, the sending, according to the first subscription message, a second subscription message to the base station includes:
determining a base station user identifier of the mobile terminal in a base station according to the user identifier of the mobile terminal, and determining a QoS flow identifier according to the service attribute of the video to be downloaded;
and sending a second subscription message to the base station according to the base station user identification and the QoS flow identification.
Optionally, the second subscription message carries a base station user identifier, a QoS flow identifier, and a target rate threshold.
It can be seen from the above embodiment that, the 5G core network device obtains the first subscription message sent by the video server, and can obtain the rate condition of the mobile terminal in the 5G network by interacting with the base station in the 5G network, and feed back the admission notification of whether the target rate threshold is met to the video server, so that the video server adjusts the code rate of downloading the video to be downloaded by the mobile terminal according to the admission notification.
The embodiment of the present disclosure further provides a method for adjusting a video bitrate, which is applied to a base station device in a 5G network, and the method includes:
receiving a second subscription message sent by the 5G core network equipment, wherein the second subscription message carries a base station user identifier, a QoS flow identifier and a target rate threshold;
obtaining a judgment result whether the quality parameter of the downlink wireless channel of the mobile terminal corresponding to the base station user identifier and the scheduling priority corresponding to the QOS flow identifier meet a target rate threshold, and sending a feedback message to the 5G core network equipment so that the 5G core network equipment sends an access notification to a video server according to the feedback message;
the second subscription message is generated by the 5G core network device according to a first subscription message sent by the video server, and the first subscription message carries the user identifier of the mobile terminal, the service attribute of the video to be downloaded and the target rate threshold.
An embodiment of the present disclosure further provides a communication system, including: a mobile terminal, a video server, a 5G core network device and a base station device,
the mobile terminal is connected with a video server, and the video server is connected with 5G core network equipment;
the video server acquires the user identification of the mobile terminal, the service attribute of the video to be downloaded and a target rate threshold, and sends a first subscription message to the 5G core network equipment according to the user identification of the mobile terminal, the service attribute of the video to be downloaded and the target rate threshold;
the 5G core network equipment receives a first subscription message and sends a second subscription message to the base station according to the first subscription message, wherein the second subscription message carries a base station user identifier, a QoS flow identifier and a target rate threshold;
the base station acquires a judgment result whether the quality parameter meets a target rate threshold according to the downlink wireless channel quality parameter of the mobile terminal corresponding to the base station user identifier and the scheduling priority corresponding to the QOS flow identifier, and sends a feedback message to the 5G core network equipment;
the 5G core network equipment receives the feedback message and sends an admission notification to a video server according to the feedback message, wherein the admission notification carries a judgment result of whether the rate of downloading the video to be downloaded from the video server by the mobile terminal meets a target rate threshold or not and the target rate threshold according to the second subscription message;
and the video server adjusts the video code rate according to the admission notice.
Optionally, the receiving, by the 5G core network device, the first subscription message and sending, to the base station, a second subscription message according to the first subscription message includes:
determining a base station user identifier of the mobile terminal in a base station according to the user identifier of the mobile terminal, and determining a QoS flow identifier according to the service attribute of the video to be downloaded;
and sending a second subscription message to the base station according to the base station user identification and the QoS flow identification.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present specification and together with the description, serve to explain the principles of the specification.
Fig. 1 is a schematic flowchart of a method for adjusting a video bitrate according to an embodiment of the present disclosure.
Fig. 2 is a flowchart illustrating a method for adjusting a video bitrate according to an embodiment of the present disclosure.
Fig. 3 is a flowchart illustrating a method for adjusting a video bitrate according to an embodiment of the present disclosure.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present specification. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the specification, as detailed in the appended claims.
The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the description. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It should be understood that although the terms first, second, third, etc. may be used herein to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, the first information may also be referred to as second information, and similarly, the second information may also be referred to as first information, without departing from the scope of the present specification. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.
The embodiment of the disclosure provides a method for adjusting video code rate, which utilizes a video server and a mobile network to carry out linkage and utilizes the capability openness of the mobile network to carry out self-adaptive adjustment of the video code rate.
As shown in fig. 1, the method is applied to a video server, the video server is connected with a mobile terminal, and the video server is connected with a 5G core network device, and the method includes:
s101, sending a first subscription message to 5G core network equipment, wherein the first subscription message carries a user identifier of a mobile terminal, a service attribute of a video to be downloaded and a target rate threshold, so that the 5G core network equipment determines whether the rate of downloading the video from a video server by the mobile terminal meets the target rate threshold or not according to the first subscription message and the network state of the mobile terminal;
s102, receiving an admission notification sent by 5G core network equipment, wherein the admission notification carries a judgment result of whether the rate of downloading the video from the video server by the mobile terminal meets a target rate threshold or not and the target rate threshold;
s103, if the judgment result is satisfied, adjusting the video code rate to a target code rate corresponding to the target rate threshold;
and S104, if the judgment result is that the video code rate is not satisfied, adjusting the video code rate to a target code rate corresponding to a first rate threshold lower than the target rate threshold.
In this embodiment, the mobile terminal may be a human-computer interaction device with a wireless network interface, such as a mobile phone, an ipad, a computer, and a wearable smart device.
In the embodiment of the present disclosure, the mobile terminal establishes a connection with the video server, and may download and play the video segment to be downloaded from the video server at an initial bitrate (e.g., a default bitrate or a user selection).
Meanwhile, the video server performs step S101, and in step S101, the first subscription message sent to the 5G core network device mainly includes a subscriber identity of the mobile terminal, where the subscriber identity may be address information of the mobile terminal (for example, an IP address of the mobile terminal), a service attribute of the video to be downloaded (the service attribute of the video to be downloaded may be IP quintuple information of the video service), and a target rate threshold (in another embodiment, the target rate threshold and the target time threshold may be included at the same time), where the target rate threshold may include at least one threshold rate value, for example, the target rate threshold includes (2Mbps, 1Mbps) (correspondingly, in another embodiment, the target time threshold may be a 2 Mbps-time threshold, 1 Mbps-time threshold).
Generally, a NEF (Network Exposure Function, mobile Network capability openness device in a 5G Network) is provided in the 5G core Network device, and the video server may be connected to the NEF in the 5G core Network device.
After receiving the first subscription message sent by the video server, the NEF device may execute the following steps, for example, a method for adjusting a video bitrate shown in fig. 2 is applied to a 5G core network device, where the 5G core network device is connected to the video server through a network open function NEF, and the method includes:
s201, receiving a first subscription message sent by a video server, wherein the first subscription message carries a user identifier of a mobile terminal, a service attribute of a video to be downloaded and a target rate threshold;
s202, according to the first subscription message, sending a second subscription message to the base station, so that the base station determines whether the rate of downloading the video to be downloaded from the video server by the mobile terminal meets a target rate threshold or not according to the second subscription message;
s203, an admission notice is sent to a video server, so that the video server adjusts the code rate of the video to be downloaded according to the admission notice;
and the base station determines whether the rate of downloading the video to be downloaded from the video server by the mobile terminal meets the judgment result of the target rate threshold or not according to the second subscription message and the target rate threshold.
As described in the foregoing embodiment, the 5G core network device receives, through the network open function NEF, the first subscription message sent by the video server (the information included in the first subscription message is described in the foregoing embodiment)
In step S202, the NEF may convert the user identifier of the mobile terminal in the first subscription message into a mobile terminal identifier in the mobile network (for example, into an international mobile subscriber identity IMSI), and send a notification to an SMF (Session Management Function, Session Management device in 5G core network), where the notification carries the mobile terminal identifier, the service attribute of the video to be downloaded, and a target rate threshold
After receiving the notification, the SMF device converts the service attribute of the video to be downloaded into a QoS flow identifier, converts the mobile terminal identifier carried in the notification into an identifier of the mobile terminal in the base station (hereinafter referred to as a base station user identifier) by using an AMF (Access and Mobility Management Function, Mobility Management device in 5G network), and sends a second subscription message to the base station according to the information obtained in the above step, where the second subscription message carries the base station user identifier, the QoS flow identifier, and the target rate threshold.
In this embodiment of the present disclosure, after receiving the second subscription message, the base station may execute the steps in fig. 3, which specifically includes:
s301, receiving a second subscription message sent by the 5G core network device, wherein the second subscription message carries a base station user identifier, a QoS flow identifier and a target rate threshold;
s302, according to the downlink wireless channel quality parameter of the mobile terminal corresponding to the base station user identifier and the scheduling priority corresponding to the QOS flow identifier, obtaining a judgment result whether the downlink wireless channel quality parameter meets a target rate threshold, and sending a feedback message to 5G core network equipment, so that the 5G core network equipment sends an access notification to a video server according to the feedback message;
the second subscription message is generated by the 5G core network device according to a first subscription message sent by the video server, and the first subscription message carries the user identifier of the mobile terminal, the service attribute of the video to be downloaded and the target rate threshold.
In step S302, after receiving the second subscription message sent by the 5G core network device (SMF device), the base station queries the corresponding QoS flow context according to the base station user identifier and the QoS flow identifier, and performs a radio resource admission decision (i.e., completes the subscription) according to the rate threshold and the time threshold when performing downlink radio resource scheduling in the subsequent process.
The base station can inform the mobile terminal corresponding to the user identification of the base station to measure the quality of the downlink wireless channel, and carries out calculation and analysis according to the QoS flow identification and the target rate threshold (time threshold) in the received second subscription message, and carries out analysis in descending order of the rate threshold in each downlink scheduling period of the base station:
for example, in one case, for a certain target rate threshold in the second subscription message, the base station performs admission control decision on the rate by analogy to the guaranteed rate (i.e. deciding whether the base station can meet the radio resource required by the rate) on the basis of comprehensively considering information such as the downlink radio channel quality, bearer or scheduling priority of QoS flow measured by the mobile terminal, and if the admission control of the rate is met within the time threshold corresponding to the target rate threshold, the base station sends a feedback message to the 5G core network device (e.g. to the NEF device), where the message carries the target rate threshold and the decision result (where the decision result is that the identifier is met). Optionally, when the contents of the radio resource admission event that needs to be transmitted at this time and the event transmitted last time are not different, the radio resource admission event may not be transmitted. In this example, when the 2Mbps target rate threshold admission meets the requirement, the feedback message carries the target rate threshold of 2Mbps and meets the identification.
For another example, in another case, if all target rate thresholds in the second subscription message are within the corresponding time thresholds, and there is a case that admission control of a certain scheduling period is not satisfied, the base station sends a feedback message to the 5G core network device, where the feedback message carries the minimum target rate threshold and the unsatisfied flag brought by the second subscription message. Optionally, when the content of the feedback message to be sent at this time is not different from the content of the feedback message sent at the previous time, the feedback message may not be sent. In this example, when both 2Mbps and 1Mbps rates are not admitted, the rate threshold carried in the feedback message is 1Mbps and does not satisfy the identifier.
And the 5G core network equipment sends an admission notification to the video server according to the feedback message, and executes the step S103 or the step S104 according to the admission notification.
Specifically, when the admission notification received by the video server carries the satisfied identifier, the video bitrate is adjusted to the bitrate corresponding to the rate threshold in the message, and when the admission notification received by the video server carries the unsatisfied identifier, the video bitrate is adjusted to the next-gear bitrate of the bitrate corresponding to the rate threshold in the message.
In this embodiment, after the adjustment of the bit rate of the video server is completed, the video server notifies the video playing client of the adjusted bit rate through the control message, and simultaneously adjusts the local TCP sending window (when the bit rate is increased, the sending window can be increased to accelerate sending and improve the video fragment downloading rate of the video playing client, and when the bit rate is decreased, the sending window can be decreased to avoid congestion), and after receiving the control message, the video client downloads and plays the video fragment at the new bit rate.
It can be seen from the foregoing embodiments that, in this embodiment, by using the linkage between the video server and the 5G network device (5G core network device and base station), the bitrate of the video service to be downloaded by the mobile terminal in the video server can be dynamically adjusted according to the bandwidth rate of the mobile terminal in the 5G network.
An embodiment of the present disclosure further provides a communication system, where the communication system includes: a mobile terminal, a video server, a 5G core network device and a base station device,
the mobile terminal is connected with a video server, and the video server is connected with 5G core network equipment;
the video server acquires the user identification of the mobile terminal, the service attribute of the video to be downloaded and a target rate threshold, and sends a first subscription message carrying the information to the 5G core network equipment;
the 5G core network equipment receives a first subscription message and sends a second subscription message to the base station according to the first subscription message, wherein the second subscription message carries a base station user identifier, a QoS flow identifier and a target rate threshold;
the base station acquires a judgment result whether the quality parameter meets a target rate threshold according to the downlink wireless channel quality parameter of the mobile terminal corresponding to the base station user identifier and the scheduling priority corresponding to the QOS flow identifier, and sends a feedback message to the 5G core network equipment;
the 5G core network equipment receives the feedback message and sends an admission notification to a video server according to the feedback message, wherein the admission notification carries a judgment result of whether the rate of downloading the video to be downloaded from the video server by the mobile terminal meets a target rate threshold or not and the target rate threshold according to the second subscription message;
and the video server adjusts the video code rate according to the admission notice.
Optionally, the receiving, by the 5G core network device, the first subscription message and sending, to the base station, a second subscription message according to the first subscription message includes:
determining a base station user identifier of the mobile terminal in a base station according to the user identifier of the mobile terminal, and determining a QoS flow identifier according to the service attribute of the video to be downloaded;
and sending a second subscription message to the base station according to the base station user identification and the QoS flow identification.
The foregoing description has been directed to specific embodiments of this disclosure. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.
Other embodiments of the present description will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This specification is intended to cover any variations, uses, or adaptations of the specification following, in general, the principles of the specification and including such departures from the present disclosure as come within known or customary practice within the art to which the specification pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the specification being indicated by the following claims.
It will be understood that the present description is not limited to the precise arrangements described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present description is limited only by the appended claims.
The above description is only a preferred embodiment of the present disclosure, and should not be taken as limiting the present disclosure, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure.
Claims (10)
1. A method for adjusting video code rate is applied to a video server, wherein the video server is connected with a mobile terminal, and the video server is connected with a 5G core network device, and the method comprises the following steps:
sending a first subscription message to a 5G core network device, wherein the first subscription message carries a user identifier of a mobile terminal, a service attribute of a video to be downloaded and a target rate threshold, so that the 5G core network device determines whether the rate of downloading the video from a video server by the mobile terminal meets the target rate threshold according to the first subscription message and the network state of the mobile terminal;
receiving an admission notification sent by 5G core network equipment, wherein the admission notification carries a judgment result of whether the rate of downloading videos from a video server by the mobile terminal meets a target rate threshold or not and the target rate threshold;
if the judgment result is satisfied, adjusting the video code rate to a target code rate corresponding to the target rate threshold;
and if the judgment result is that the video code rate does not meet the requirement, adjusting the video code rate to a target code rate corresponding to a first rate threshold lower than the target rate threshold.
2. The method according to claim 1, wherein the sending the first subscription message to the 5G core network device specifically includes:
and sending a first subscription message to a network open function (NEF) in the 5G core network equipment.
3. The method of claim 1, wherein the first subscription message carrying the user identity of the mobile terminal comprises:
the user identification comprises address information of the mobile terminal.
4. A method for adjusting video code rate is applied to a 5G core network device, wherein the 5G core network device is connected with a video server through a network open function (NEF), and the method comprises the following steps:
receiving a first subscription message sent by a video server, wherein the first subscription message carries a user identifier of a mobile terminal, a service attribute of a video to be downloaded and a target rate threshold;
according to the first subscription message, sending a second subscription message to the base station, so that the base station determines whether the rate of downloading the video to be downloaded from the video server by the mobile terminal meets a target rate threshold or not according to the second subscription message;
sending an admission notification to a video server so that the video server adjusts the code rate of a video to be downloaded according to the admission notification;
and the base station determines whether the rate of downloading the video to be downloaded from the video server by the mobile terminal meets the judgment result of the target rate threshold or not according to the second subscription message and the target rate threshold.
5. The method of claim 4, wherein the service attribute of the video to be downloaded comprises: quintuple information of the video to be downloaded.
6. The method of claim 4, wherein sending a second subscription message to a base station according to the first subscription message comprises:
determining a base station user identifier of the mobile terminal in a base station according to the user identifier of the mobile terminal, and determining a QoS flow identifier according to the service attribute of the video to be downloaded;
and sending a second subscription message to the base station according to the base station user identification and the QoS flow identification.
7. The method of claim 4 or 6, wherein the second subscription message carries a base station user identity, a QoS flow identity, and a target rate threshold.
8. A method for adjusting video code rate, wherein the method is applied to a base station device in a 5G network, and the method comprises:
receiving a second subscription message sent by the 5G core network equipment, wherein the second subscription message carries a base station user identifier, a QoS flow identifier and a target rate threshold;
obtaining a judgment result whether the quality parameter of the downlink wireless channel of the mobile terminal corresponding to the base station user identifier and the scheduling priority corresponding to the QOS flow identifier meet a target rate threshold, and sending a feedback message to the 5G core network equipment so that the 5G core network equipment sends an access notification to a video server according to the feedback message;
the second subscription message is generated by the 5G core network device according to a first subscription message sent by the video server, and the first subscription message carries the user identifier of the mobile terminal, the service attribute of the video to be downloaded and the target rate threshold.
9. A communication system, the communication system comprising: a mobile terminal, a video server, a 5G core network device and a base station device,
the mobile terminal is connected with a video server, and the video server is connected with 5G core network equipment;
the video server acquires the user identification of the mobile terminal, the service attribute of the video to be downloaded and a target rate threshold, and sends a first subscription message to the 5G core network equipment according to the user identification of the mobile terminal, the service attribute of the video to be downloaded and the target rate threshold;
the 5G core network equipment receives a first subscription message and sends a second subscription message to the base station according to the first subscription message, wherein the second subscription message carries a base station user identifier, a QoS flow identifier and a target rate threshold;
the base station acquires a judgment result whether the quality parameter meets a target rate threshold according to the downlink wireless channel quality parameter of the mobile terminal corresponding to the base station user identifier and the scheduling priority corresponding to the QOS flow identifier, and sends a feedback message to the 5G core network equipment;
the 5G core network equipment receives the feedback message and sends an admission notification to a video server according to the feedback message, wherein the admission notification carries a judgment result of whether the rate of downloading the video to be downloaded from the video server by the mobile terminal meets a target rate threshold or not and the target rate threshold according to the second subscription message;
and the video server adjusts the video code rate according to the admission notice.
10. The communication system according to claim 9, wherein the 5G core network device receives a first subscription message and sends a second subscription message to the base station according to the first subscription message, and the method comprises:
determining a base station user identifier of the mobile terminal in a base station according to the user identifier of the mobile terminal, and determining a QoS flow identifier according to the service attribute of the video to be downloaded;
and sending a second subscription message to the base station according to the base station user identification and the QoS flow identification.
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