WO2013010498A1

WO2013010498A1 - Service coding rate adjustment method and communication node

Info

Publication number: WO2013010498A1
Application number: PCT/CN2012/078936
Authority: WO
Inventors: 伍振兴
Original assignee: 华为技术有限公司
Priority date: 2011-07-20
Filing date: 2012-07-20
Publication date: 2013-01-24
Also published as: CN102256314B; CN102256314A

Abstract

Provided are a service coding rate adjustment method and a communication node. A service coding rate adjustment method, including: a base station monitoring the service transmission rate of a first air interface between the base station and user equipment; obtaining the average air interface bandwidth of a first service corresponding to the first air interface; and sending the average air interface bandwidth of the first service to a service server used for buffering packet service data, so that the service server adjusts the coding rate of the first service to match the average air interface bandwidth of the first service. The method evaluates the air interface bandwidth situation by the base station in real time, then notifies the service server, decreasing the time delay of feeding same back to the service server, so that the service server can respond to the change of the air interface bandwidth in time, and adjust the coding rate of the service in time, reducing scenarios of air interface congestion and packet loss produced during service transmission.

Description

Service code rate adjustment method and communication node The present application claims the priority of the Chinese application filed on July 20, 2011, with the application number 201110204126.7 and the invention name "service code rate adjustment method and communication node", the entire contents of which are The citations are incorporated herein by reference. Technical field

The present invention relates to the field of mobile communications technologies, and in particular, to a service coding rate adjustment method and a communication node. BACKGROUND OF THE INVENTION The explosive growth of mobile services has brought a large network expansion pressure to operators, in order to reduce the bandwidth consumption of the transmission network of the core network and the RAN (Radio Access Network), and reduce the running cost of the service. The differentiated QoS (Quality of Service) service is implemented, and the network structure is continuously flattened. Currently implementing caching at the base station

The Cache technology caches the service at the base station, and the user can directly download the service from the base station, which improves the QoS of the service and reduces the traffic of the transmission network.

In the prior art, when a user downloads a service from a base station, it needs to send TCP/IP to the base station.

(Transmission Control Protocol/Internet Protocol) data is sent to the TCP/IP ACK (Acknowledgement) feedback frame returned by the base station to measure the real-time feedback delay to determine the current air interface bandwidth condition, and then the user will determine The air interface bandwidth condition notifies the service server, and the service server adjusts the coding rate of the service accordingly, so that the coding rate matches the air interface bandwidth of the user.

However, the channel environment of the air interface changes rapidly. The delay of the air interface bandwidth is long, and the service server cannot respond in time. As a result, the service coding rate cannot be adjusted in time, and when the channel environment deteriorates, the service transmission process is extremely It is easy to cause air interface congestion and packet loss. SUMMARY OF THE INVENTION The embodiments of the present invention provide a service coding rate adjustment method and a communication node, which can adjust a service coding rate in time.

In order to solve the above technical problem, an aspect of the present invention provides a service coding rate adjuster. Law, including:

The base station monitors a service transmission rate of the first air interface between the base station and the user equipment;

Obtaining an average air interface bandwidth of the first service corresponding to the first air interface;

The average air interface bandwidth of the first service is sent to a service server for buffering the packet service data, so that the service server adjusts the coding rate of the first service to match the average air interface bandwidth of the first service.

Another aspect of the present invention provides a service coding rate adjustment method, including:

The service server for buffering the packet service data receives the average air interface bandwidth of the first service sent by the base station, where the average air interface bandwidth of the first service is monitored by the base station, and the service transmission rate of the first air interface corresponding to the first service is monitored. And obtaining according to the service transmission rate calculation; the service server adjusts the coding rate of the first service to match the average air interface bandwidth of the first service.

Another aspect of the present invention provides a communication node for implementing a function of a base station, where the communication node includes:

a first I/O interface, configured to communicate with a user equipment;

a second I/O interface, configured to communicate with a service server;

a first processing unit, configured to monitor a service transmission rate of the user equipment in the first I/O interface, obtain an average air interface bandwidth of the first service corresponding to the first I/O interface, and use the second I/O interface and the The service server communicates, and sends the average air interface bandwidth of the first service to the service server, so that the service server adjusts the coding rate of the first service to match the average air interface bandwidth of the first service.

Another aspect of the present invention provides a communication node for implementing a function of a service server for buffering packet service data, the communication node comprising:

a third I/O interface, configured to communicate with a base station;

The second processing unit is configured to adjust the coding rate of the first service to match the average air interface bandwidth of the first service according to the average air interface bandwidth of the first service received by the third I/O interface.

In the embodiment of the present invention, the base station evaluates the service transmission rate of the air interface to obtain the air interface bandwidth, and directly feeds back the air interface bandwidth condition to the service server, and then the service server adjusts the service coding rate, and the adjustment method is used by the base station to evaluate the air interface bandwidth in real time. Situation, then pass Knowing the service server, shortening the delay of feedback to the service server, enabling the service server to respond to the change of the air interface bandwidth in time, and adjusting the coding rate of the service in time, thereby greatly reducing the air interface congestion and packet loss generated during the service transmission process. The base station and the service server can adaptively adjust the coding rate without the participation of the user equipment. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings to be used in the embodiments or the description of the prior art will be briefly described below, and obviously, in the following description The drawings are only some of the embodiments of the present invention, and other drawings may be obtained from those skilled in the art without departing from the drawings.

FIG. 1 is a schematic diagram of a system for adjusting a service coding rate according to an embodiment of the present invention; FIG. 2B is a schematic structural diagram of a system for configuring a base station and a user equipment according to an embodiment of the present invention; FIG. 2 is another method for adjusting a service coding rate according to an embodiment of the present invention; FIG. 3 is a schematic structural diagram of a communication node according to an embodiment of the present invention; FIG.

4 is a schematic structural diagram of another communication node according to an embodiment of the present invention.

The detailed description of the present invention and the accompanying drawings are to be understood as

The embodiment of the present invention provides a method for adjusting a service coding rate, a base station, and a service server. The base station evaluates the service transmission rate of the air interface to obtain the air interface bandwidth, and directly feeds back the air interface bandwidth condition to the service server, and then performs the service by the service server. The adjustment of the coding rate, the adjustment method is performed by the base station to evaluate the bandwidth of the air interface in real time, and then notify the service server to shorten the delay of the feedback to the service server, so that the service server can respond to the change of the air interface bandwidth in time, and adjust the coding rate of the service in time. Therefore, the air interface congestion and packet loss caused by the service transmission process are greatly reduced, and the base station and the service server can be adaptively adjusted to the coding rate without the participation of the user equipment. For details of the implementation process, refer to the description of the subsequent embodiments.

The technical solution of the present invention will be described below with reference to the accompanying drawings and embodiments.

FIG. 1 is a flowchart of a method for adjusting a service coding rate according to an embodiment of the present invention. As shown in FIG. 1B, a system structure diagram of a base station and a user equipment in the embodiment, where the system includes but is not limited to a base station and a user equipment, where the base station includes but is not limited to a scheduling module, a media server, and a service transceiver module; Including but not limited to business transceiver modules and media playback modules. In this embodiment, when the user equipment downloads service data from the base station through the service transceiver module, the base station allocates air interface resources for each service, and the user equipment performs service data transmission and reception at the air interface allocated by the base station. The base station may also perform scheduling on the air interface resource of each service according to the air interface channel environment. The specific scheduling algorithm may include, but is not limited to, a rotation training algorithm, a proportional fairness algorithm, a maximum signal to noise ratio algorithm, and the like, and details are not described herein. After the base station allocates the air interface resources of the services, the air interface bandwidth of each service also changes. In this case, the service server needs to adjust the coding rate of the service to match the air interface bandwidth of the service. include:

Step 101: The base station monitors a service transmission rate of the first air interface between the base station and the user equipment. In this embodiment, the coding rate adjustment of the first service at the first air interface is taken as an example. The "first" is only for convenience of description, and is not specifically.

After the base station allocates the first air interface for the first service, the user equipment can download the data of the first service from the base station through the first air interface. The base station can monitor the service transmission rate of the first service at the first air interface in real time or periodically.

Specifically, the base station can obtain the service transmission rate of the first service at the first air interface by using the measurement, where the service transmission rate of the first service at the first air interface should be the real-time service transmission rate of the current scheduling frame, that is, the base station calculates Service transmission rate of the current scheduling frame: Service transmission rate = transmission data volume of the service / scheduling period of the frame; scheduling period of 2 ms in WCDMA (Wideband Code Dimensional Multiple Access), LTE ( Long Term Evolut ion ) is lms.

Step 102: Obtain an average air interface bandwidth of the first service corresponding to the first air interface.

After obtaining the service transmission rate of the first service at the first air interface, the base station may send the service transmission rate to the service server as the real-time air interface bandwidth of the first service. The service transmission rate of a scheduling period is inaccurate, and the smoothed rate can accurately reflect the actual bandwidth of the air interface. In this embodiment, after the service transmission rate of the preset first time is obtained, the segment is also calculated. The average value of the service transmission rate in time, and then the average transmission rate is used as the average air interface bandwidth of the first service, and sent to the service server. In addition, the average value of the service transmission rate in a period of time is calculated, that is, the average air interface bandwidth of the first service, and a smoothing algorithm can be used: The actual service transmission rate of the base station (i) = P* The actual transmission rate of the base station (i-1) + (lp) * The service transmission rate of the current frame of the base station

Where p is the memory factor, depending on the channel change rate of the air interface, the faster the channel environment changes, the lower the P value, the typical value can be 0. 8 , i can be understood as the number of scheduled frames, once scheduled I added one, which is useful in the prototype of DPI&Cache. Among them, DPI (Deep Packet Inspection) technology is an application layer-based traffic detection and control technology, when IP packets, TCP or UDP ( User Datagram Protocol ) When the data stream passes the bandwidth management system based on DPI technology, the system reorganizes the application layer information in the Layer 7 protocol of the 0SI (Open System Interconnect) by deeply reading the contents of the IP packet payload. The content of the entire application, and then the traffic is shaped according to the system-defined management policy.

Step 103: Send the average air interface bandwidth of the first service to the service server, so that the service server adjusts the coding rate of the first service to match the average air interface bandwidth of the first service.

The base station sends the first service average air interface bandwidth to the service server, where the service server is a server that caches the packet service data, and the address is configured by the operation and maintenance personnel. After receiving the address, the base station receives the address according to the The address establishes communication with the business server. After receiving the average air interface bandwidth of the first service, the service server can adjust the coding rate of the first service to match the average air interface bandwidth of the first service.

The specific adjustment process of the service server is the same as the method for adjusting the service coding rate according to the average air interface bandwidth sent by the user equipment in the prior art, and details are not described herein again.

In this embodiment, the service server may be set inside the base station, that is, the service server and the base station are combined into one on the network element.

In the embodiment of the present invention, the service transmission rate of the air interface is evaluated by the base station to obtain the air interface bandwidth condition, and then the air interface bandwidth condition is directly fed back to the service server, and then the service server adjusts the service coding rate, and the adjustment method is performed by the base station to evaluate the air interface in real time. The bandwidth is then notified to the service server, which shortens the delay of the feedback to the service server. The service server can respond to the change of the air interface bandwidth in time and adjust the coding rate of the service in time, thereby greatly reducing the air interface congestion caused by the service transmission process. In the case of packet loss, the base station and the service server can adaptively adjust the coding rate without the participation of the user equipment.

Referring to FIG. 2, it is a flowchart of another method for adjusting a service coding rate according to an embodiment of the present invention. In this embodiment, the first service may be a media stream, and the service server may be a media service. The method can include:

Step 201: The base station monitors a service transmission rate of the first air interface.

Step 202: The base station calculates an average air interface bandwidth of the first service corresponding to the first air interface. The base station calculates the average service transmission rate at the first air interface in the preset time according to the service transmission rate at the first air interface, and records the average service transmission rate as the average air interface bandwidth of the first service corresponding to the first air interface.

Step 203: Send the average air interface bandwidth of the first service to the service server.

Steps 201-203 are similar to steps 101-103 in the foregoing embodiment, and are not described herein again. Step 204: The service server adjusts the coding rate of the first service to match the average air interface bandwidth of the first service.

In order to ensure the continuity of the video, the matching of the coding rate is matched based on the principle of slow rise and fall. The coding rate of the service server is not continuous, but is adjusted in a fixed step. The coding rate can only be adjusted by one step. The step size is adjusted, and the down adjustment can be directly in place. Specifically, if the average air interface bandwidth of the first service is greater than the coding rate of the first service before the adjustment, the coding rate of the first service is increased by one step; if the average air interface bandwidth of the first service is smaller than that before the adjustment The coding rate of a service directly lowers the coding rate of the first service to the maximum available coding rate, which is the maximum coding rate of the coding rate available to the service server, which is smaller than the average air interface bandwidth.

After adjusting the coding rate of the first service, the service server directly informs the user equipment of the coding rate, or proceeds to the next step.

Step 205: The base station receives the coding rate of the first service sent by the service server, and sends the code rate to the user equipment corresponding to the first service.

Step 206: The user equipment decodes the first service according to the coding rate.

After receiving the coding rate, the user equipment can decode the received service data by using the coding rate. For example, the media player local to the user equipment can use the coding rate to play the downloaded media stream.

The embodiment of the invention shortens the delay of the feedback to the service server, so that the service server can respond to the change of the air interface bandwidth in time, and adjust the coding rate of the service in time, thereby greatly reducing air interface congestion and packet loss caused by the service transmission process. The base station and the service server can adaptively adjust the coding rate without the participation of the user equipment.

The above is a description of an embodiment of the method of the present invention, and the following is a device for implementing the above method. Introduction.

3 is a schematic structural diagram of a communication node according to an embodiment of the present invention.

The communication node is configured to implement the function of the base station, and the communication node may include:

a first I/O interface 301, configured to communicate with a user equipment;

a second I/O interface 302, configured to communicate with a service server;

The first processing unit 303 is configured to monitor the service transmission rate of the user equipment in the first I/O interface 301, and obtain the average air interface bandwidth of the first service corresponding to the first I/O interface 301, and pass the second I/O interface 302. And communicating with the service server, sending the average air interface bandwidth of the first service to the service server, so that the service server adjusts the coding rate of the first service to match the average air interface bandwidth of the first service. In a specific implementation, as shown in FIG. 3, the monitoring unit in the storage module 304 monitors the service transmission rate of the user equipment in the first I/O interface 301, and the first I/O interface 301 is obtained by the computing unit. The average air interface bandwidth of the first service is sent by the sending unit, and the monitoring unit, the calculating unit, and the sending unit respectively store the foregoing program code, and are stored in a storage module 304, the first The processing unit 303 executes the program code of each unit in the storage module 304 by the first processing unit 303 by loading the storage module 304.

In this embodiment, the first processing unit 303 of the communication node monitors the service transmission rate of the first service at the first I/O interface 301 in real time or periodically, and calculates the service transmission rate as the real-time air interface bandwidth of the first service. After obtaining the service transmission rate in the preset period of time, the average value of the service transmission rate in the period of time is calculated, and then the average transmission rate is used as the average air interface bandwidth of the first service, by the second I/ The O interface 302 sends to the service server, so that the service server adjusts the coding rate of the first service to match the average air interface bandwidth of the first service.

In the embodiment of the present invention, the air interface bandwidth is fed back to the service server by the foregoing unit of the communication node, and the delay of the feedback to the service server is shortened, so that the service server can respond to the change of the air interface bandwidth in time, and adjust the coding rate of the service in time, thereby greatly The air interface congestion and packet loss situation generated during the service transmission process are reduced, and the base station and the service server can be adaptively adjusted to the coding rate without the participation of the user equipment.

In another embodiment of the present invention, the first processing unit 303 is specifically configured to calculate an average service transmission rate at the first air interface in the preset time according to the service transmission rate at the first air interface, and record the average service transmission rate. Average air interface bandwidth of the first service corresponding to the first air interface, specifically For the calculation process, please refer to the corresponding description in the foregoing method embodiment. The communication node may further include a forwarding unit, and the second I/O interface 302 receives the coding rate of the first service sent by the service server, and sends the coding rate to the user corresponding to the first service by using the first I/O interface 301. The device, so that the user equipment decodes the first service according to the coding rate.

Referring to FIG. 4, it is a schematic structural diagram of another communication node according to an embodiment of the present invention.

The communication node is configured to implement the function of the service server, and the communication node may include: a third I/O interface 401, configured to communicate with the base station;

The second processing unit 402 is configured to adjust the coding rate of the first service to match the average air interface bandwidth of the first service according to the average air interface bandwidth of the first service received by the third I/O interface 401. Specifically, the program code for the encoding rate adjustment may be stored by the storage module 403, and the second processing unit 402 performs the storage by the second processing unit 402 after receiving the average air interface bandwidth of the first service. The program code in the storage module 403 performs encoding rate adjustment. The communication node shown in FIG. 3 monitors the service transmission rate of the first air interface corresponding to the first service, and obtains the average air interface bandwidth of the first service according to the service transmission rate, and then sends the data to the third I/O interface 401 through the third I/O interface 401. After the second processing unit 402 of the present communication node receives the average air interface bandwidth of the first service through the third I/O interface 401, the program for encoding rate adjustment stored in the storage module 403 can be executed. The code is configured to adjust the coding rate of the first service, so that the adjusted coding rate is matched with the average air interface bandwidth of the first service. Specifically, the second processing unit 402 may be when the average air interface bandwidth of the first service is greater than When the coding rate of the first service is adjusted, the coding rate of the first service is increased by one step; when the average air interface bandwidth of the first service is smaller than the coding rate of the first service before the adjustment, the first service is used. The coding rate is lowered to the maximum available coding rate.

The communication node in the embodiment of the present invention receives the average air interface bandwidth of the service sent by the base station, adjusts the coding rate of the service, and shortens the delay of receiving the air interface bandwidth, so that the service server can respond to the change of the air interface bandwidth in time. The service coding rate is adjusted in time, thereby greatly reducing air interface congestion and packet loss caused by the service transmission process, and the base station and the service server can adaptively adjust the coding rate without the participation of the user equipment.

In another embodiment of the present invention, the service server may further include a fourth I/O interface, configured to communicate with the user equipment, and a rate sending unit, configured to: use the fourth I/O interface to The coding rate is sent to the user equipment corresponding to the first service, so that the user equipment decodes the first service according to the coding rate. In this embodiment, the communication node may be set in the base station, and the communication node and the base station that implement the service server function are combined into one on the network element.

The embodiments of the present invention described above are not intended to limit the scope of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and scope of the invention are intended to be included within the scope of the appended claims.

Claims

A method for adjusting a service coding rate, which is characterized by comprising:

The base station monitors a service transmission rate of the first air interface between the base station and the user equipment, and obtains an average air interface bandwidth of the first service corresponding to the first air interface;

Transmitting an average air interface bandwidth of the first service to a service server for buffering packet service data, so that the service server adjusts an encoding rate of the first service to an average air interface with the first service The bandwidth matches.

The method according to claim 1, wherein the obtaining the average air interface bandwidth of the first service corresponding to the first air interface comprises:

Calculating, according to the service transmission rate of the first air interface, an average service transmission rate of the first air interface in a preset time period, and recording the average service transmission rate as an average air interface of the first service corresponding to the first air interface. bandwidth.

The method according to claim 1 or 2, further comprising: receiving, by the base station, a coding rate of the first service sent by the service server, and sending the coding rate to the a user equipment corresponding to the service, so that the user equipment decodes the first service according to the coding rate.

The service server for buffering the packet service data receives the average air interface bandwidth of the first service sent by the base station, where the average air interface bandwidth of the first service is monitored by the base station by the first air interface corresponding to the first service The service transmission rate is calculated according to the service transmission rate;

The service server adjusts a coding rate of the first service to match an average air interface bandwidth of the first service.

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

Transmitting the coding rate of the first service to the user equipment corresponding to the first service, so that the user equipment decodes the first service according to the coding rate.

The method according to claim 4 or 5, wherein the service server adjusts the coding rate of the first service to match the average air interface bandwidth of the first service, and includes:

If the average air interface bandwidth of the first service is greater than the coding rate of the first service before the adjustment An uplinking step, the coding rate of the first service is increased by one step; if the average air interface bandwidth of the first service is smaller than the coding rate of the first service before the adjustment, the first service is used. The coding rate is lowered to the maximum available coding rate.

A communication node, configured to implement a function of a base station, where the communication node includes:

a first input/output I/O interface for communicating with a user equipment;

a second I/O interface, configured to communicate with a service server;

a first processing unit, configured to monitor a service transmission rate of the user equipment in the first I/O interface, and obtain an average air interface bandwidth of the first service corresponding to the first I/O interface, by using the second The I/O interface communicates with the service server, and sends an average air interface bandwidth of the first service to the service server, so that the service server adjusts a coding rate of the first service to the first The average air interface bandwidth of the service matches.

8. The communication node according to claim 7, wherein:

The first processing unit is configured to calculate, according to a service transmission rate of the first I/O interface, an average service transmission rate of the first I/O interface in a preset time, and the average service transmission rate. It is recorded as the average air interface bandwidth of the first service corresponding to the first I/0 interface.

The communication node according to claim 7 or 8, further comprising: a forwarding unit, configured to receive, by using the second I/O interface, a coding rate of the first service sent by the service server Transmitting, by the first I/O interface, the coding rate to the user equipment corresponding to the first service, so that the user equipment decodes the first service according to the coding rate.

A communication node, configured to implement a function of a service server for buffering packet service data, wherein the communication node comprises:

a third I/O interface, configured to communicate with the base station;

And a second processing unit, configured to adjust, according to the average air interface bandwidth of the first service by using the third I/O interface, the coding rate of the first service to match an average air interface bandwidth of the first service.

The communication node according to claim 10, further comprising: a fourth I/O interface, configured to communicate with the user equipment;

a rate sending unit, configured to send, by using the fourth I/O interface, an encoding rate of the first service to a user equipment corresponding to the first service, so that the user equipment is configured according to the encoding The rate decodes the first service.

12. A communication node according to claim 10 or 11, characterized in that

The second processing unit is configured to: when the average air interface bandwidth of the first service is greater than an encoding rate of the first service before the adjustment, increase the coding rate of the first service by one step. When the average air interface bandwidth of the first service is smaller than the coding rate of the first service before the adjustment, the coding rate of the first service is reduced to a maximum available coding rate.