WO2014089752A1

WO2014089752A1 - Stream media transmission method, apparatus and communication device

Info

Publication number: WO2014089752A1
Application number: PCT/CN2012/086340
Authority: WO
Inventors: 张力学; 熊春山
Original assignee: 华为技术有限公司
Priority date: 2012-12-11
Filing date: 2012-12-11
Publication date: 2014-06-19
Also published as: CN104025524A; CN104025524B

Abstract

Disclosed are a stream media transmission method, an apparatus and a communication device. According to a stream media data packet sent by a network side to a terminal, a current buffer parameter of the stream media is calculated. When the buffer parameter is greater than a preset first threshold, indicating that a transmission rate of the stream media is over-high, the transmission rate of the stream media is reduced. Therefore, the transmission rate of the stream media on a wireless network can be restricted by presetting the first threshold, so that excessive resources will not be buffered when the stream media is played. Even if the stream media is stopped before it is completed in playing, a waste on a wireless air interface bandwidth can be reduced to the greatest extent, thus reducing unnecessary network transmission and improving utilization of wireless resources.

Description

Streaming media transmission method, communication device, technical field

The present invention relates to the field of communications, and in particular, to a streaming media transmission rate control method and apparatus, and a communication device. BACKGROUND OF THE INVENTION Streaming media refers to multimedia files transmitted by streaming technology on a network. Streaming media transmission enables buffering of multimedia files while playing. At the same time of streaming media playback, the network server performs download buffering according to the capacity of the buffer of the playing terminal. Generally, the size of the streaming media that the buffer of the terminal can accommodate is in minutes, that is, while playing, The size of the buffered file is often a few minutes, ten minutes, or tens of minutes.

Studies have shown that more than half of the streaming media will be discarded by the user within one minute of the user's viewing. Therefore, using the above streaming media transmission method, after the streaming media is stopped, buffer the download for a few minutes, ten minutes or a few Ten minutes of resources are useless. When the network is a wired network, due to the exclusiveness of bandwidth resources, this waste of download bandwidth is not of particular concern. When the network is a wireless network, because the bandwidth of the wireless air interface is limited and User sharing, this streaming media transmission method will cause significant waste of wireless air interface bandwidth.

Summary of the invention

In view of the above, the embodiments of the present invention provide a streaming media transmission method and device, and a communication device, which are aimed to solve the problem of waste of air interface bandwidth caused by the existing streaming media transmission method.

In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:

The present invention provides a streaming media transmission method, including:

The current buffering parameter of the streaming media is determined according to the streaming media data packet sent by the network side terminal. When the current buffering parameter of the streaming media is greater than the preset first threshold, the transmission rate of the streaming media is decreased.

In a first possible implementation manner of the method, the determining, according to the streaming media data packet sent by the network side terminal, the current buffering parameter of the streaming media includes:

Obtaining a preset clock pair to intercept the data packet of the streaming media for the first time to intercept the current data packet The time value for timing;

And adding, to the time value, a time interval lower limit value of the data packet of the streaming media that is captured for the first time, and obtaining a current playing time of the streaming media;

Detecting an upper limit of a time interval of the current data packet;

The difference between the time interval upper limit value and the current play time is used as the current buffer parameter of the streaming media.

In a second possible implementation manner of the method, the determining, according to the streaming media data packet sent by the network side terminal, the current buffering parameter of the streaming media includes:

Get the current playing time of the streaming media from the player;

Detecting an upper limit of a time interval of the current data packet;

In a third possible implementation manner of the method, the determining, according to the streaming media data packet sent by the network side terminal, the current buffering parameter of the streaming media includes:

Obtaining a preset clock pair time value from a time when the data packet of the streaming media is first sent to when the current data packet is sent;

And adding, to the time value, a time interval lower limit value of the data packet of the streaming media that is sent for the first time, and obtaining a current playing time of the streaming media;

Detecting an upper limit value of a time interval of the currently transmitted data packet;

The invention also provides a streaming media transmission device, comprising:

a determining module, configured to determine a current buffering parameter of the streaming media according to the streaming media data packet sent by the network side terminal;

The rate reduction control module is configured to reduce the transmission rate of the streaming media when a current buffering parameter of the streaming media is greater than a preset first threshold.

In a first implementation manner of the device, the determining module includes: a first time value obtaining unit, configured to acquire a preset clock pair to intercept the data packet of the streaming media for the first time to intercept the current data packet The time value for timing; a first current play time calculation unit, configured to add a time interval lower limit value of the data packet of the streaming media that is captured for the first time to the time value, and obtain a current play time of the streaming media;

a first detecting unit, configured to detect a time interval upper limit value of the current data packet; a first determining unit, configured to use, as the streaming media, a difference between the time interval upper limit value and the current playing time Current buffering parameters.

In a second implementation of the apparatus, the determining module includes: a current playing time acquiring unit, configured to acquire a current playing time of the streaming media from the player; and a second detecting unit, configured to detect the current a time interval upper limit value of the data packet; a second determining unit, configured to use a difference between the time interval upper limit value and the current play time as a current buffer parameter of the streaming media.

In a third implementation of the apparatus, the determining module includes: a second time value obtaining unit, configured to acquire a preset clock pair from the first time sending the data packet of the streaming media to sending the current data The time value at which the packet is timed;

a second current playing time calculating unit, configured to add a time interval lower limit value of the data packet of the first time sent by the streaming media to the time value, to obtain a current playing time of the streaming media;

a third detecting unit, configured to detect a time interval upper limit value of the currently sent data packet; a third determining unit, configured to use a difference between the time interval upper limit value and the current playing time as the flow The current buffering parameters of the media.

The invention also provides a communication device, comprising:

The input/output interface is configured to receive a streaming media data packet sent by the network side terminal, and the processor is configured to determine, according to the streaming media data packet sent by the network side terminal, the current buffering parameter of the streaming media, when the streaming media is currently When the buffering parameter is greater than the preset first threshold, the transmission rate of the streaming media is reduced.

In a first implementation manner of the communications device, the determining, by the processor, the current buffering parameter of the streaming media according to the streaming media data packet sent by the network to the terminal comprises:

Obtaining, by the processor, a time value for timing the first interception of the data packet of the streaming media to intercept the current data packet; and pre-acquiring the number of the first intercepted streaming media Adding a time interval lower limit value of the packet to the time value to obtain a current playing time of the streaming media; detecting a time interval upper limit value of the current data packet; and setting the upper time limit value of the time interval The difference of the current playing time is used as the current buffering parameter of the streaming media.

In a second implementation manner of the communications device, the determining, by the processor, the current buffering parameter of the streaming media according to the streaming media data packet sent by the network side terminal comprises:

The processor acquires a current playing time of the streaming media from the player; detects a time interval upper limit value of the current data packet; and uses a difference between the time interval upper limit value and the current playing time as the flow The current buffering parameters of the media.

In a third implementation manner of the communications device, the determining, by the processor, the current buffering parameter of the streaming media according to the streaming media data packet sent by the network side terminal comprises:

The processor is configured to acquire a preset clock pair time value from a time when the data packet of the streaming media is first sent to when the current data packet is sent; and a time interval of the data packet of the streaming media that is sent for the first time that is obtained in advance Adding a lower limit value to the time value to obtain a current playing time of the streaming media; detecting a time interval upper limit value of the currently transmitted data packet; and setting the time interval upper limit value and the current playing time The difference is used as the current buffer parameter of the streaming media.

The streaming media transmission method and device and the communication device disclosed in the embodiment of the present invention calculate the current buffering parameter of the streaming media according to the streaming media data packet sent by the network side terminal, when the buffering parameter is greater than a preset first threshold. When the transmission rate of the streaming media is too high, the transmission rate of the streaming media is reduced. Therefore, by setting the first threshold in advance, the transmission rate of the streaming media in the wireless network can be restricted, so that the streaming media is not buffered excessively when playing the streaming media. Resources, so even if the streaming media is stopped before the broadcast, it can minimize the waste of wireless air interface bandwidth, thereby reducing unnecessary network transmission and improving the utilization of wireless resources.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

1 is a flowchart of a streaming media transmission method according to an embodiment of the present invention; FIG. 2 is a flowchart of still another method for transmitting a streaming media according to an embodiment of the present invention; FIG. 3 is a flowchart of still another method for transmitting a streaming media according to an embodiment of the present invention; A flowchart of a method for determining a first threshold in a streaming media transmission method;

FIG. 5 is a schematic structural diagram of a streaming media transmission device according to an embodiment of the present invention; FIG. 6 is a schematic structural diagram of a communication device according to an embodiment of the present invention.

detailed description

The embodiment of the invention discloses a streaming media transmission method. After a streaming media transmission channel is established between the streaming media server and the terminal and the streaming media data packet is started, the mobile communication network calculates according to the streaming media data packet sent by the server to the terminal. The current buffering parameter of the streaming media, when the current buffering parameter of the streaming media is greater than a preset first threshold, reducing the transmission rate of the streaming media. The method can also be applied to a streaming media server or a terminal, and the buffering speed of the streaming media in the wireless network is limited by a preset first threshold, so that the streaming media does not buffer excessive content, thereby limiting the streaming media packet. The use of air interface bandwidth to avoid waste of air interface resources.

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

In this embodiment, a streaming media transmission method is disclosed, which can be applied to a network element for performing packet deep detection in a 3GPP network, for example, P-GW, S-GW, GGSN, SGSN, RNC, UTRAN or E-UTRAN. And so on, it can also be applied to the media fluid processing network element added in the method of the embodiment. When the streaming media server establishes a transmission channel with the terminal and sends the streaming media data packet to the terminal through the transmission channel, as shown in FIG. 1, the method includes:

S101: Obtain a preset clock value for time when the data packet of the streaming media is intercepted for the first time to intercept the current data packet;

When the streaming media server sends the streaming media data packet to the terminal, in this embodiment, the network element intercepts the data packet, because the data packet sent by the streaming media server may be lost, so the first intercepted data packet refers to the network element. An intercepted packet of the streaming file requested by the user, The first intercepted packet may be the first packet sent by the streaming server or other packets sent by the streaming server.

In this embodiment, the preset clock may be a clock existing in the 3GPP network, or may be a clock set in the method described in this embodiment.

This embodiment is preferably a clock separately set by the method, and an initial value of the clock is preferably set to

0, starting from the first interception of the streaming media packet, the time unit of the timing is the same as the time unit of the data packet, and the time value from the first interception of the streaming media packet to the interception of the current data packet is T, if the current data The packet is the first intercepted packet, then τ = ο.

S102: The time interval lower limit value of the data packet of the streaming media that is captured for the first time, which is captured in advance, is recorded as CPT1, and is added to the time value to obtain a current playing time of the streaming media, where the current playing time is obtained. Recorded as CPT, ie CPT=CPT1+T;

The streaming media packet usually includes the duration interval of its own data. The upper limit of the interval is called the upper limit of the time interval of the data packet, and the lower limit is called the lower limit of the time interval of the data packet. For example, the duration of the data packet is 20S--100S. Then, 20 is called the lower limit of the time interval, and 100 is called the upper limit of the time interval.

Adding the time interval lower limit value of the first intercepted data packet to the time value T in S101, the current playing time of the streaming media is obtained, and the current playing time reflects the playing progress of the streaming media at the terminal, because the network The element does not know the situation in which the terminal plays the streaming media. Therefore, it is necessary to estimate the current playing progress of the streaming media through the above calculation process.

If the current packet is the first intercepted streaming packet, the CPT is equal to its time interval lower limit.

S103: Detect an upper limit value of a time interval of the current data packet;

Here, the upper limit of the time interval of the current packet is recorded as TTI.

S104: The difference between the time interval upper limit value and the current play time is used as a current buffer parameter of the streaming media, that is, GAP=TTI-CPT;

S105: Determine whether the current buffer parameter satisfies GAP>GAPmax, if yes, execute S106, if no, execute S111;

The GAPmax is a preset first threshold, which may be predefined by the user or may be determined according to the state of the network. S106: Send, to the streaming media server, a TCP message that includes a preset window length value, so that the streaming media server reduces the transmission rate of the streaming media.

Generally, when the terminal sends a TCP message to the streaming media server, the size of the local buffer space is notified to the streaming media server, and the window length value is used to indicate the size of the buffer space local to the terminal. In this embodiment, The preset window length value is smaller than the current window length value, and may be set to zero, or the current window length value /M, and the M is a natural number, for example, one-half of the current window length value.

S107: Set the value of the preset flag to zero;

In this embodiment, the role of the preset flag bit is to indicate whether the current window length value is the reduced window length value, and the default value or initial value of the flag bit may be set to 1, when the window length value is reduced. After it is small, set it to 0, and if the window length value is not reduced, it will remain unchanged.

The order of S 106 and S 107 can be changed.

S108: Intercept the response data packet sent by the terminal to the streaming media server.

S109: Decrease a window length value in the response data packet;

In this embodiment, it is preferable to reduce the window length value to the preset window length value.

S110: Send the modified response packet to the streaming server.

Generally, after receiving the data packet sent by the streaming media server, the terminal will reply the response data packet, and the response data packet carries the window length value set according to the buffer of the terminal, so that the network side server receives the response data packet. The data packet is transmitted at a transmission rate corresponding to the window length value. In this embodiment, the data packet is intercepted by the network element, and the window length value thereof is decreased.

S111: determining whether the current buffer parameter satisfies GAP<GAPmin, and if yes, executing

S112, if no, no processing;

The GAPmin is a preset second threshold and can be customized by the user.

S112: determining whether the value of the flag is 0. If not, no processing is performed. If it is 0, executing S113;

S113: Send, to the streaming media server, a TCP message including an unreduced window length value, so that the streaming media server transmits the streaming media by using the unreduced transmission rate;

S114: Set the value of the flag bit to 1;

The purpose of setting the flag is that if the current packet is the first packet, the current transmission rate must be the normal transmission rate without degradation, even if the current buffer parameter Less than the preset second threshold, the current transmission rate is not adjusted.

In the streaming media transmission method of the embodiment, the network element intercepts the streaming media data packet sent by the streaming media server to the terminal, calculates the current buffering parameter of the streaming media, and adjusts the transmission rate of the streaming media according to the buffering parameter, when the streaming media When the terminal plays, it will not be buffered too much margin, so when the user stops watching, the waste of wireless air interface resources can be minimized.

The method for transmitting a streaming media according to the embodiment of the present invention is applied to a terminal, where the terminal initiates a streaming media playback request to the streaming media server, and the streaming media server establishes a streaming media transmission channel with the terminal, as shown in FIG. 2, Methods include:

S201: obtaining a current playing time of the streaming media from the player CPT;

For the terminal, the current playing time of the medium fluid can be directly obtained from the player, and no further calculation is required.

S202: Detecting a transmission duration of the current data packet, which is recorded as TTI;

S203: The difference between the time interval upper limit value and the current play time is used as a current buffer parameter of the streaming media, and the current buffer parameter is recorded as GAP=TTI-CPT;

S204: Determine whether GAP>GAPmax is established, if yes, execute S205, if no, execute S207;

S205: Send, to the streaming media server, a TCP message that includes a preset window length value, where the preset window length value is smaller than a current window length value;

The purpose of this step is to enable the streaming media server to reduce the transmission rate of the streaming media. The setting method of the preset window length value is the same as that of the foregoing embodiment, and details are not described herein again.

S206: Set the preset flag to zero;

The default value of the preset identifier bit may be 1.

S207: Determine whether the current buffer parameter satisfies GAP<GAPmin, if yes, execute S208, if no, do not process;

S208: Determine whether the current value of the flag is zero. If yes, execute S209. If no, no process is performed.

In this embodiment, the non-processing means that the processing related to the transmission rate in the scope of the present invention is not performed. In practical applications, the conventional processing of the streaming media data packet by the terminal may be performed.

S209: Send a TCP message including an unreduced window length value to the streaming server, so that The network side server transmits the streaming media using a transmission rate before the reduction.

S210: Set the value of the identifier bit to 1;

S211: Receive an instruction to pause playing the streaming media;

The instruction to pause playing streaming media is usually sent by the application layer according to the user's instructions.

S212: Send, to the streaming media server, a TCP message that includes a window length value of zero, so that the network side server stops transmitting the streaming media.

In the prior art, when the user pauses the playing of the streaming media, the streaming media is still in the buffer state, that is, the buffering margin continues to increase, that is, the streaming media server does not stop the transmission of the streaming media packet, and the existing The technical difference is that, in this embodiment, when the user pauses streaming media playback, the terminal sends a TCP message to the network side server, indicating that the cache of the streaming media server terminal is zero, and the streaming media server stops transmitting the data packet, for the 3GPP network. Words can save valuable air interface bandwidth.

It should be noted that S211 and S212 may also be performed before S201, and the order of execution of the steps of adjusting the transmission rate may be adjusted.

In the streaming media transmission method of the embodiment, the terminal calculates the current buffer parameter according to the received data packet, and controls the transmission rate of the streaming media by sending a TCP message to the streaming media server, thereby limiting the streaming media. Download rate, save air interface bandwidth.

The streaming media transmission method disclosed in the embodiment of the present invention is applied to a streaming media server, and a streaming media transmission channel is established between the streaming media server and the terminal, and the streaming media data packet is sent to the terminal. As shown in FIG. 3, the method includes :

S301: Obtain a preset clock pair time value from a time when the data packet of the streaming media is first sent to when the current data packet is sent.

S302: adding a time interval lower limit value CPT1 of the data packet of the streaming media that is sent for the first time and the time value T to obtain the current playing time CPT of the streaming media. For the streaming media server, Similar to the network element, it is also necessary to estimate the playback progress of the terminal streaming media by calculation. Unlike the network element, the streaming media server only needs to calculate according to the data packet that it sends to the terminal.

S303: detecting a time interval upper limit value of the currently sent data packet, which is recorded as TTI; S304: using a difference between the time interval upper limit value and the current play time as the flow The current buffering parameter of the media, namely GAP=TTI-CPT;

S305: Determine whether GAP>GAPmax is established, if yes, execute S306, if no, execute S308;

S306: Send a streaming media data packet to the terminal at a preset transmission rate.

The preset transmission rate is less than the current transmission rate.

S307: Set the value of the preset flag to zero;

S308: Determine whether the current buffer parameter satisfies GAP<GAPmin, if yes, execute S309, if no, no processing;

S309: Determine whether the value of the flag bit is 0, if yes, execute S310, if no, do not process;

S310: The streaming media is transmitted using a transmission rate before the reduction.

S311: Set the value of the flag bit to 1.

That is to say, after the transmission rate is reduced, the flag is set to 0, and the flag is set to 1 after the transmission rate is restored, so that the flag is used as one of the determination conditions for whether to reduce the rate. If the flag is 1, the transmission rate is indicated. If it is not lowered, the operation of increasing the transmission rate is not performed even if the current GAP is greater than the preset first threshold.

In the streaming media transmission method of the embodiment, the execution entity is a streaming media server, and the streaming media server calculates the current buffering parameter of the streaming media according to the sent data packet, and is used to correct the rate of sending the data packet, thereby saving network resources.

It should be noted that all the above embodiments focus on the current data packet, that is, when the data packet is intercepted, received, or transmitted, the calculation of the buffer margin and the control of the transmission rate are performed, that is, the above embodiment The method is performed according to the transmission period of the data packet, but the present invention is not limited thereto, and may be performed in a time unit of the buffer parameter. For example, if the GAP value is in units of seconds, the method may be 1S. The cycle is performed, that is, the buffer parameter is calculated every 1S, and the transmission rate is revised according to the buffer parameter.

In all of the above embodiments, the control of the streaming media transmission rate is based on the download amount of the streaming media itself, and the focus is on the streaming media itself, without paying attention to the current state of the network.

The invention also discloses a method for setting a first threshold preset in the foregoing embodiment according to a network state. As shown in FIG. 4, the method includes: S401: Detecting a load quantity of the network side wireless link;

S402: Determine the preset first threshold according to the load amount.

In the method of the embodiment, the preset first threshold, that is, the value of GAPmax, is determined according to the load of the wireless link in the network. Specifically, GAPmax=K*GAPmax, where K is a parameter related to the busy state of the wireless link. In general, the value of K is 1. When the network is busy, K becomes smaller. When the network is idle, K becomes larger. That is, when the network is busy, the first threshold is decreased. When the network is idle, the first threshold is increased. In the case where the first threshold is fixed in the above embodiment, the state of the streaming media itself is considered, and the state of the wireless network is taken into consideration, so that the wireless network can be used more effectively. The first threshold value determination and adjustment method described in this embodiment is applicable to all of the above embodiments.

Further, in all of the above embodiments, the streaming media server is sent to the terminal, and the terminal may also obtain the streaming media packet by accessing the cache unit provided in the network.

In order to accelerate the distribution of streaming media data on mobile networks, a cache unit (Cache) is often placed in the 3GPP network. When the content accessed by the UE is cached in the Cache, the UE can acquire the network resource from the Cache without accessing the streaming server. Therefore, the streaming media server in all the above embodiments may be replaced by a cache unit, and details are not described herein again.

Corresponding to the above method embodiment, the present invention also discloses a streaming media transmission device, as shown in FIG. 5, including

a determining module 501, configured to determine a current buffering parameter of the streaming media according to the streaming media data packet sent by the network side terminal;

The rate reduction control module 502 is configured to reduce the transmission rate of the streaming media when the current buffering parameter of the streaming media is greater than a preset first threshold.

The device in this embodiment may be used by a network element, a terminal, or a streaming media server to limit the buffering speed of the streaming media in the wireless network by using a preset first threshold, so that the streaming media does not buffer excessive content. It can limit the occupation of air interface bandwidth by streaming media packets, thus avoiding waste of air interface resources.

Further, when the device is used for a network element, the method specifically includes:

a first time value obtaining unit, configured to acquire a preset clock value for time when the data packet of the streaming media is intercepted for the first time to intercept the current data packet; a first current play time calculation unit, configured to add a time interval lower limit value of the data packet of the streaming media that is captured for the first time to the time value, and obtain a current play time of the streaming media;

a first detecting unit, configured to detect a time interval upper limit value of the current data packet; a first determining unit, configured to use, as the streaming media, a difference between the time interval upper limit value and the current playing time Current buffering parameters;

a response packet intercepting unit, configured to intercept a response packet sent by the terminal to the streaming server, reduce a window length value in the response packet, and send the modified response packet to a network side server ;

a first TCP message sending unit, configured to: when the current buffering parameter of the streaming media is greater than a preset first threshold, send a TCP message including a preset window length value to the streaming media server, so that the streaming media The server reduces the transmission rate of the streaming media, where the preset window length value is smaller than the current window length value;

And identifying a location zero unit, configured to: when the current buffering parameter of the streaming media is greater than a preset first threshold, set a value of the preset identifier bit to zero;

a rate increase control module, configured to: when the current buffering parameter of the streaming media is less than a preset second threshold, and the value of the preset identifier bit is zero, increase the transmission rate of the streaming media, specifically, the The rate increasing unit may be: a second TCP message sending unit, configured to send, to the streaming media server, a TCP message including an unreduced window length value, so that the network side server uses the unreduced transmission rate transmission Streaming media.

The identification location 1 unit is configured to set the value of the preset identification bit to 1 when the transmission rate is increased.

Further, when the device is used in a terminal, the method specifically includes:

a current playing time obtaining unit, configured to acquire a current playing time of the streaming media from the player; a second detecting unit, configured to detect a time interval upper limit value of the current data packet; a second determining unit, configured to: The difference between the time interval upper limit value and the current play time is used as the current buffer parameter of the streaming media.

a first TCP message sending unit, configured to: when the current buffering parameter of the streaming media is greater than a preset first threshold, send a TCP message including a preset window length value to the streaming media server, so that The streaming media server reduces the transmission rate of the streaming media, and the preset window length value is smaller than the current window length value.

And identifying a location zero unit, configured to set a value of the preset identifier bit to zero when the current buffering parameter of the streaming media is greater than a preset first threshold.

a rate increase control module, configured to: when the current buffering parameter of the streaming media is less than a preset second threshold, and the value of the preset identifier bit is zero, increase the transmission rate of the streaming media, specifically, the The rate increasing unit may be: a second TCP message sending unit, configured to send, to the network side server, a TCP message that restores the transmission rate to a value before the reduction, so that the network side server transmits the transmission rate before the reduction. The streaming media;

a location 1 unit, configured to set the value of the preset identifier bit to 1 when the rate of the speed is increased;

And a pause instruction sending unit, configured to send, to the streaming media server, a TCP message including a window length value of zero after receiving the instruction to pause playing the streaming media, so that the streaming media server stops transmitting the streaming media.

Further, when the device is used in a streaming media server, the method specifically includes:

a second time value obtaining unit, configured to acquire a preset clock pair time value from a time when the data packet of the streaming media is first sent to when the current data packet is sent;

a third detecting unit, configured to detect a time interval upper limit value of the currently sent data packet; a third determining unit, configured to use a difference between the time interval upper limit value and the current playing time as the flow Current buffer parameters of the media;

a first sending unit, configured to send a streaming media data packet to the terminal at a preset transmission rate, where the preset transmission rate is smaller than a current transmission rate;

a rate increase control module, configured to: when the current buffering parameter of the streaming media is less than a preset second threshold, and the value of the preset identifier bit is zero, increase the transmission rate of the streaming media, specifically, The rate increase control module may be: a second sending unit, configured to transmit the streaming media by using a transmission rate before the reduction;

Further, the device further includes:

The first threshold determining module is configured to detect a load quantity of the network side wireless link, and determine the preset first threshold according to the load quantity.

The receiving module is configured to receive a streaming media packet sent by the buffer unit preset by the network side to the terminal.

The invention also discloses a communication device, as shown in FIG. 6, comprising:

The input/output interface 601 is configured to receive a streaming media data packet sent by the network side terminal, and the processor 602 is configured to determine, according to the streaming media data packet sent by the network side terminal, the current buffering parameter of the streaming media, when the current When the current buffering parameter of the media is greater than a preset first threshold, the transmission rate of the streaming media is decreased;

Further, in this embodiment, the specific process of determining, by the processor, the current buffering parameter of the streaming media according to the streaming media data packet sent by the network to the terminal may be:

The processor may be configured to acquire a time value of the preset clock for timing the data packet of the streaming media to be intercepted to intercept the current data packet; and the time of the first captured data packet of the streaming media that is acquired in advance The interval lower limit value is added to the time value to obtain a current play time of the streaming media; detecting a time interval upper limit value of the current data packet; and the time interval upper limit value and the current play time The difference is used as the current buffering parameter of the streaming media;

Or the processor is further configured to: acquire a current playing time of the streaming media from the player; detect a time interval upper limit value of the current data packet; and compare a difference between the time interval upper limit value and the current playing time The value is used as the current buffering parameter of the streaming media;

Alternatively, the processor further acquires a preset clock pair time value from a time when the data packet of the streaming media is first sent to when the current data packet is sent; and the pre-acquired data packet of the streaming media that is sent for the first time Adding a time interval lower limit value to the time value to obtain a current play time of the streaming media; detecting a time interval upper limit value of the currently sent data packet; and setting the time interval upper limit value to the current time The difference in play time is used as the current buffer of the streaming media. Number.

In addition to this, it may preferably include:

The memory 603 is configured to store a current buffering parameter of the streaming media.

The communication device in this embodiment may be a network element, a terminal, or a streaming media server of the 3GPP network, or may be a network side cache. The communication device controls the current transmission rate of the streaming media according to the calculated buffering parameters, thereby avoiding unnecessary data packet transmission, thereby improving the utilization of the wireless interface.

The functions described in the method of the present embodiment can be stored in a readable storage medium of a computing device if implemented in the form of a software functional unit and sold or used as a standalone product. Based on such understanding, a portion of the embodiments of the present invention that contributes to the prior art or a portion of the technical solution may be embodied in the form of a software product stored in a storage medium, including a plurality of instructions for causing a The computing device (which may be a personal computer, server, mobile computing device, or network device, etc.) performs all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a U disk, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program codes. .

The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on differences from other embodiments, and the same or similar parts of the various embodiments may be referred to each other.

The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments are obvious to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not intended to be limited to the embodiments shown herein, but the broadest scopes

Claims

Rights request

1. A streaming media transmission method, characterized by including:

Determine the current buffering parameters of the streaming media based on the streaming media data packets sent from the network side to the terminal; when the current buffering parameters of the streaming media are greater than the preset first threshold, reduce the transmission rate of the streaming media.

2. The method according to claim 1, characterized in that, determining the current buffering parameters of the streaming media based on the streaming media data packet sent from the network side to the terminal includes:

Obtain the time value of the preset clock from the first interception of the data packet of the streaming media to the interception of the current data packet;

Add the pre-obtained lower limit of the time interval of the first intercepted data packet of the streaming media to the time value to obtain the current playback time of the streaming media;

Detect the upper limit of the time interval of the current data packet;

The difference between the upper limit of the time interval and the current playback time is used as the current buffering parameter of the streaming media.

3. The method according to claim 2, characterized in that, after reducing the transmission rate of the streaming media, further comprising:

Intercept the response data packet sent by the terminal to the streaming media server;

Reduce the window length value in the response data packet;

Send the modified response packet to the streaming server.

4. The method according to claim 1, characterized in that, determining the current buffering parameters of the streaming media based on the streaming media data packet sent from the network side to the terminal includes:

Get the current playback time of streaming media from the player;

Detect the upper limit of the time interval of the current data packet;

5. The method according to claim 4, further comprising:

After receiving an instruction to pause the playing of streaming media, a TCP message containing a window length value of zero is sent to the streaming media server, so that the streaming media server stops transmitting the streaming media.

6. The method according to claim 2 or 4, characterized in that: reducing the streaming media Body transfer rates include:

Send a TCP message containing a preset window length value to the streaming media server, so that the network side server reduces the transmission rate of the streaming media, and the preset window length value is smaller than the current window length value.

7. The method according to claim 6, characterized in that the preset window length value includes: zero or,

The window length value is divided by M, where M is a natural number.

8. The method according to claim 1, characterized in that, determining the current buffering parameters of the streaming media based on the streaming media data packet sent from the network side to the terminal includes:

Obtain the time value of the preset clock from the first transmission of the data packet of the streaming media to the transmission of the current data packet;

Add the pre-obtained lower limit of the time interval of the data packet of the streaming media sent for the first time to the time value to obtain the current playback time of the streaming media;

Detect the upper limit of the time interval of the currently sent data packet;

9. The method of claim 8, wherein reducing the transmission rate of the streaming media includes:

The streaming media data packet is sent to the terminal at a preset transmission rate, and the preset transmission rate is smaller than the current transmission rate.

10. The method according to claim 1, 2, 4 or 8, characterized in that when the current buffering parameter of the streaming media is greater than a preset first threshold, it further includes:

Set the default flag value to zero.

11. The method according to claim 10, further comprising:

When the current buffering parameter of the streaming media is less than the preset second threshold and the value of the preset identification bit is zero, the transmission rate of the streaming media is increased.

12. The method according to claim 11, characterized in that said increasing the transmission rate of said streaming media includes:

Send a TCP message including the unreduced window length value to the streaming server such that the stream The media server transmits the streaming media using the transmission rate before the reduction.

13. The method according to claim 11, characterized in that said increasing the transmission rate of said streaming media includes:

The stream is transmitted using the previous transmission rate without reduction.

14. The method according to any one of claims 11 to 13, further comprising: setting the value of the preset identification bit to 1.

15. The method according to any one of claims 1, 2, 4 or 8, characterized in that the method for determining the preset first threshold includes:

Detect the load of the network-side wireless link;

The preset first threshold is determined according to the load amount.

16. The method according to any one of claims 1, 2, 4 or 8, characterized in that, before calculating the current buffering parameters of the streaming media based on the streaming media data packets sent from the network side to the terminal, include:

Receive streaming media data packets sent to the terminal from the cache unit preset on the network side.

17. A streaming media transmission device, characterized by including:

The determination module is used to determine the current buffering parameters of the streaming media based on the streaming media data packets sent from the network side to the terminal;

A rate reduction control module, configured to reduce the transmission rate of the streaming media when the current buffering parameter of the streaming media is greater than a preset first threshold.

18. The device according to claim 17, wherein the determination module includes: a first time value acquisition unit, configured to acquire a preset clock pair from the first interception of the data packet of the streaming media to the interception of the current data. The time value of the package for timing;

The first current playback time calculation unit is used to add the pre-obtained lower limit of the time interval of the first intercepted data packet of the streaming media to the time value to obtain the current playback time of the streaming media;

The first detection unit is used to detect the upper limit of the time interval of the current data packet; the first determination unit is used to use the difference between the upper limit of the time interval and the current playback time as the streaming media The current buffering parameters.

19. The device according to claim 18, further comprising: A response data packet interception unit, configured to intercept the response data packet sent by the terminal to the streaming media server, reduce the window length value in the response data packet, and send the modified response data packet to the network side server. .

20. The device according to claim 17, wherein the determination module includes: a current playback time acquisition unit, used to obtain the current playback time of the streaming media from the player; a second detection unit, used to detect the The upper limit of the time interval of the current data packet; a second determination unit, configured to use the difference between the upper limit of the time interval and the current playback time as the current buffering parameter of the streaming media.

21. The device according to claim 20, further comprising:

The pause instruction sending unit is configured to, after receiving an instruction to pause the playing of streaming media, send a TCP message containing a window length value of zero to the streaming media server, so that the streaming media server stops transmitting the streaming media.

22. The device according to claim 18 or 20, characterized in that the rate reduction control module includes:

A first TCP message sending unit, configured to send a TCP message containing a preset window length value to the streaming media server when the current buffering parameter of the streaming media is greater than a preset first threshold, so that the streaming media The server reduces the transmission rate of the streaming media, and the preset window length value is smaller than the current window length value.

23. The device according to claim 17, characterized in that the determination module includes: a second time value acquisition unit, configured to acquire a preset clock pair from the first transmission of the data packet of the streaming media to the transmission of the current The time value for timing of data packets;

The second current playback time calculation unit is used to add the pre-obtained lower limit of the time interval of the data packet of the streaming media sent for the first time to the time value to obtain the current playback time of the streaming media;

The third detection unit is used to detect the upper limit of the time interval of the currently sent data packet; the third determination unit is used to use the difference between the upper limit of the time interval and the current playback time as the stream The current buffering parameters of the media.

24. The device according to claim 23, characterized in that the rate reduction control module includes: A first sending unit configured to send streaming media data packets to the terminal at a preset transmission rate, where the preset transmission rate is smaller than the current transmission rate.

25. The device according to claim 17, 18, 20 or 23, further comprising:

The identification bit zero unit is used to set the value of the preset identification bit to zero when the current buffering parameter of the streaming media is greater than the preset first threshold.

26. The device according to claim 25, further comprising:

A rate increase control module, configured to increase the transmission rate of the streaming media when the current buffering parameter of the streaming media is less than a preset second threshold and the value of the preset identification bit is zero.

27. The device according to claim 26, characterized in that the rate increase control module includes:

The second TCP message sending unit is configured to send a TCP message including an unreduced window length value to the streaming media server, so that the network side server transmits the streaming media using the transmission rate before reduction.

28. The device according to claim 26, characterized in that the rate increase control module includes:

The second sending unit is configured to transmit the streaming media using the previous transmission rate that is not reduced.

29. The device according to any one of claims 26 to 28, further comprising: an identification position 1 unit, configured to set the value of the preset identification bit when the transmission rate is increased. is 1.

30. The device according to claim 17, 18, 20 or 23, further comprising:

A first threshold determination module, configured to detect the load of the network-side wireless link, and determine the preset first threshold based on the load.

31. The device according to claim 17, 18, 20 or 23, further comprising:

The receiving module is used to receive streaming media data packets sent to the terminal from the cache unit preset on the network side.

32. A communication device, characterized by: including: The input and output interface is used to receive streaming media data packets sent from the network side to the terminal; the processor is used to determine the current buffering parameters of the streaming media based on the streaming media data packets sent from the network side to the terminal. When the streaming media is currently When the buffering parameter is greater than the preset first threshold, the transmission rate of the streaming media is reduced.

33. The communication device according to claim 32, characterized in that the processor is configured to determine the current buffering parameters of the streaming media based on the streaming media data packet sent from the network side to the terminal, specifically including:

The processor obtains a preset clock to time the time value from the first interception of the data packet of the streaming media to the interception of the current data packet; and sets the pre-acquired lower limit of the time interval of the first interception of the data packet of the streaming media. Add the value to the time value to obtain the current playback time of the streaming media; detect the upper limit of the time interval of the current data packet; calculate the difference between the upper limit of the time interval and the current playback time As the current buffering parameters of the streaming media.

34. The communication device according to claim 32, characterized in that the processor is configured to determine the current buffering parameters of the streaming media based on the streaming media data packet sent from the network side to the terminal, specifically including:

The processor obtains the current playback time of the streaming media from the player; detects the upper limit of the time interval of the current data packet; and uses the difference between the upper limit of the time interval and the current playback time as the stream The current buffering parameters of the media.

35. The communication device according to claim 32, characterized in that the processor is configured to determine the current buffering parameters of the streaming media based on the streaming media data packet sent from the network side to the terminal, specifically including:

The processor is configured to obtain a preset clock for timing the time value from the first transmission of the data packet of the streaming media to the transmission of the current data packet; and use the pre-acquired time interval of the first transmission of the data packet of the streaming media Add the lower limit value to the time value to obtain the current playback time of the streaming media; detect the upper limit value of the time interval of the currently sent data packet; compare the upper limit value of the time interval with the current playback time The difference is used as the current buffering parameter of the streaming media.

36. The communication device according to claim 32, further comprising: a memory, configured to store the current buffering parameters of the streaming media.

37. The communication device according to any one of claims 32 to 36, characterized in that: The communication device is any one of the following: network element; terminal; streaming media server; network-side cache.