WO2008083568A1 - A method, apparatus and system for allocating the wireless bandwidth - Google Patents

Abstract

A method for allocating the wireless bandwidth of the mobile stream media code flow includes that: parse the response of the real-time protocol request, obtain the bandwidth information of the stream media file, judge whether to update the bandwidth allocated to the mobile terminal according to the bandwidth information of the stream media file, if necessary, initiate the bandwidth updating procedure and update the bandwidth of the mobile terminal. The present invention alto provides a system for allocating the wireless bandwidth of the mobile stream media code flow and a gateway GPRS support node.

Description

 Wireless bandwidth allocation method, device and system

Technical field

 The present invention relates to the field of communications, and more particularly to a wireless bandwidth allocation method, apparatus, and system. Background of the invention

 The mobile streaming media service is an online audio and video dynamic multimedia content service provided by a mobile operator to a mobile terminal through a mobile network or a fixed broadband network. With the advent of the 3G era, 3G networks can provide larger bandwidth for mobile terminals to meet the needs of streaming media services. Mobile streaming services are also increasingly attracting the attention of users and the attention of the industry. According to different media resources, 3G networks can provide audio services and video services separately.

 The 3G mobile terminal accesses the mobile streaming media service, and its business process can be generally divided into the following three steps:

 Step 1: The mobile terminal activates a Packet Data Protocol (PDP) context;

 Step 2: The mobile terminal obtains a streaming media service webpage (PSS (packet switch streaming service) Portal);

 Step 3: The mobile terminal accesses the streaming server (PSS Server).

 FIG. 1 shows a service flow of a 3G mobile terminal accessing a mobile streaming media service in the related art, which is described in detail as follows:

Step 1: The mobile terminal initiates PDP activation via the access network to the GSN (including the Service GPRS Support Node GPRS (SGSN) and the Gateway GPRS Support Node (GGSN). request. Step 2: The GSN initiates a remote authentication dial-in user service (RADIUS, Remote Authentication Dial-In User Service) charging request to the Wireless Application Protocol Gateway (WWGW), and the mobile terminal information (such as the access point name) (APN), International Mobile Subscriber Identity (IMSI), Mobile Integrated International Digital Number (MSISDN), Quality of Service (QoS) profile, etc. are sent to the WAPGW for waiting for the charging response.

 Step 3: The WAPGW sends the charging response to the GSN.

 Step 4: The GSN returns the PDP activation acceptance to the mobile terminal.

 Step 5: The mobile terminal initiates a GET request for accessing a streaming media service web page (HTTP, Hyper Text Transfer Protocol) to obtain a webpage of the streaming media service.

 Step 6: The WAPGW forwards the request to the web server of the streaming media service.

 Seventh, eight steps: The streaming web server returns an HTTP request response to the WAPGW and forwards it to the mobile terminal.

 Step 9: The mobile terminal accesses the streaming server to watch the program through a Real-Time Streaming Protocol (RTSP) according to the returned webpage link.

 However, mobile terminals use this process to access streaming services, and there are shortcomings under current conditions. Specifically, according to the operator's policy, there may be multiple types of mobile terminal subscription bandwidth, such as: 144Kbps, 256Kbps, 384Kbps, etc., and the streaming media server can also provide media files of multiple streams, such as: 120Kbps, 240Kbps. 360Kbps, etc.; Therefore, when the mobile terminal accesses the streaming media service, the following may occur: A mobile terminal with a subscription bandwidth of 144 Kbps accesses a file of 240 Kbps or higher, which may result in insufficient bandwidth to cause the mobile terminal to watch the streaming media. The program is not effective or can't be viewed at all.

In addition, the relevant standards for secondary activation of PDP contexts are provided in section 9.2.2.1.1 of 3GPP Standard Specification 230.60, which is described as follows: The Secondary PDP Context Activation procedure may be used to activate a PDP context while reusing the PDP address and other PDP context information from an already active PDP context, but with a different QoS profile. (Secondary PDP context activation procedure, reused activated PDP address and other

PDP context information, but get new QoS attributes ;).

 When the 3G mobile terminal supports the PDP context secondary activation function, the PDP context secondary activation process may be used to adjust the bandwidth allocated by the network to the mobile terminal to meet the bandwidth requirement of the media file rate according to the code rate of the accessed media file. .

 Fig. 2 shows a message flow diagram of PDP context secondary activation according to the related art. According to the 230.60 standard of 3GPP, the detailed implementation of PDP context secondary activation is as follows:

1. The mobile terminal initiates a secondary activation PDP context request.

 2. SGSN (Service GPRS Support Node GPRS) initiates a PDP context request to the GGSN (Gateway GPRS Support Node).

 3. The GGSN responds to the SGSN after the PDP context is created.

 4. The SGSN requires the UMTS Terrestrial Radio Access Network (UTRAN) to establish a Radio Access Bearer (RAB).

 5. According to the result of the RAB establishment, if the QoS changes, the SGSN initiates a PDP context update request to the GGSN.

 6. The GGSN responds to the SGSN after completing the PDP context update.

 7. The SGSN sends an active PDP context to the MS (mobile station).

However, existing 3G mobile terminals rarely support PDP context secondary activation, so that it is not feasible to adjust the bandwidth allocated to the mobile terminal by using PDP context secondary activation. Therefore, there is a need for a wireless bandwidth allocation scheme that can adapt to a mobile streaming stream to solve the problem that the bandwidth allocated to the mobile terminal does not match the mobile streaming stream accessed by the mobile terminal, thereby causing the resulting The problem is solved accordingly. Summary of the invention

 Embodiments of the present invention are directed to a wireless bandwidth allocation method, apparatus, and system to address the problem of bandwidth allocated to a mobile terminal not matching a mobile streaming stream accessed by a mobile terminal.

 In the embodiment of the present invention, a method for allocating a wireless bandwidth is provided, including: parsing a response of a real-time streaming protocol request, obtaining bandwidth information of a streaming media file, and determining, according to the obtained bandwidth information of the streaming media file, whether updating needs to be allocated to the mobile terminal. Bandwidth, if needed, initiates a bandwidth update process to update the bandwidth allocated to the mobile terminal.

 In an embodiment of the present invention, a wireless bandwidth allocation system is provided, including: a wireless bandwidth allocation apparatus, configured to instruct a gateway general packet radio service support node to parse a response of a real-time streaming protocol request, to determine whether an update needs to be allocated to the mobile The bandwidth of the terminal, if necessary, initiates a bandwidth update procedure to update the bandwidth allocated to the mobile terminal;

 The gateway general packet radio service support node is configured to parse the response of the real-time streaming protocol request according to the instruction of the wireless bandwidth allocation device of the mobile streaming media stream.

 In the embodiment of the present invention, a gateway general packet radio service support node is further provided, including: an update module, configured to parse a response of a real-time streaming protocol request, to determine whether it is necessary to update a bandwidth allocated to the mobile terminal, if necessary, Then a bandwidth update process is initiated to update the bandwidth allocated to the mobile terminal.

As can be seen from the foregoing technical solution, the present invention obtains the bandwidth information of the streaming media file by the network side analyzing the response of the real-time streaming media request, and updates the bandwidth allocated to the mobile terminal when determining that the bandwidth needs to be updated, because the existing 3G mobile terminal supports the Said bandwidth update, therefore, this issue It is not necessary to make any changes to the 3G mobile terminal, and only need to make appropriate changes on the network side; thus, the user's streaming media service experience can be improved, and the air interface resources can be saved. Therefore, the present invention achieves the following technical effects:

 The invention can change the allocation of the bandwidth resources of the mobile terminal to the network according to the stream stream attribute of the streaming media file in real time, solve the problem that the low-bandwidth mobile terminal cannot access the high-stream stream media file, and solve the problem of low-bandwidth mobile terminal accessing the low-stream stream media file. The problem of bandwidth resources improves the user experience of streaming media services.

 Other features and advantages of the invention will be set forth in the description in the description which follows. The objectives and other advantages of the invention may be realized and obtained by means of the structure particularly pointed in the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS

 The drawings are intended to provide a further understanding of the embodiments of the present invention, and are intended to be a part of the present invention, and the description of the present invention is not intended to limit the invention. In the drawing:

 FIG. 1 is a flowchart showing a service flow of a 3G mobile terminal accessing a mobile streaming media service in the related art;

 2 shows a message flow diagram of PDP context secondary activation according to the related art; FIG. 3 shows a message flow diagram of a wireless bandwidth allocation adapted to a mobile streaming media code stream according to an embodiment of the present invention;

4 is a flowchart showing a wireless bandwidth allocation method according to an embodiment of the present invention; FIG. 5 is a block diagram showing a wireless bandwidth allocation apparatus according to an embodiment of the present invention; and FIG. 6 is a diagram showing a wireless according to an embodiment of the present invention. The source code of the bandwidth allocation program. Mode for carrying out the invention

 The invention will be described in detail below with reference to the drawings in conjunction with the embodiments.

 4 is a flow chart showing a wireless bandwidth allocation method according to an embodiment of the present invention, including the following steps:

 Step S402: When the mobile terminal initiates a packet data protocol activation request, the mobile terminal requests the mobile device to allocate a certain bandwidth to the mobile terminal requesting the access;

 Step S404, when the mobile terminal initiates the RTSP request, the GGSN receives the response of the RTSP request, parses the response of the RTSP request to obtain the streaming media file bandwidth information, and determines whether the bandwidth allocated to the mobile terminal needs to be updated according to the obtained streaming media file bandwidth information; If necessary, a bandwidth update process is initiated to update the bandwidth allocated to the mobile terminal.

 3 is a message flow diagram showing a method for adapting a wireless bandwidth allocation to a mobile streaming media code stream according to an embodiment of the present invention, wherein a step description portion marked with a description box indicates a place different from the prior art in the embodiment of the present invention. . The same parts as the prior art have been described in detail in Section 9.2.2.1.1 of the 3GPP Standard Specification 230.60, and therefore will not be described again here. It includes the following steps:

 The user accesses the streaming media service, and the mobile terminal initiates a PDP activation process, and allocates certain bandwidth resources to the mobile terminal after negotiation between the network devices. After the PDP context activation process is completed, the mobile terminal initiates an RTSP (DESCRIBE) request, requesting and streaming media. The server interacts. This is basically the same as the normal process.

 Next, when the streaming server responds to the RTSP message, the GGSN parses the key field in the response, obtains the streaming media file bandwidth information, and determines whether it is necessary to update the bandwidth allocated to the mobile terminal (step S302).

If necessary, a bandwidth update request process is initiated to update the bandwidth allocated to the mobile terminal, and the streaming media service access process is continued after the bandwidth redistribution is completed (steps 14, 15). After the user accesses the streaming media service, the resource release process is initiated to release the wireless resource (step S306). The detailed implementation process is shown in FIG. 3. The difference between the embodiment of the present invention and the prior art in the section 9.2.2丄1 of the 3GPP standard specification 230.60 is:

 Step S302: When the PSS Server responds to the MS in the RTSP/SDP, the GGSN parses the response information field, obtains the media file bandwidth information, compares the bandwidth that has been allocated to the mobile terminal, determines whether to initiate the update, and then performs steps 14 and 15 to utilize the QoS. The update process updates the bandwidth of the mobile terminal.

 In this step, the “contrast media file bandwidth information and the bandwidth already allocated to the mobile terminal determine whether to initiate an update” is specifically:

 When the media file bandwidth is smaller than the bandwidth already allocated to the mobile terminal, an update is initiated to reduce the bandwidth allocated to the mobile terminal;

 When the media file bandwidth is greater than the bandwidth already allocated to the mobile terminal, an update is initiated to increase the bandwidth allocated to the mobile terminal.

 Step S304: When the PSS Server sends an RTP (Real-Time Transport Protocol) media stream to the MS, the GGSN detects the RTP media stream in real time. When there is no media stream (timeout mechanism), the QoS update process is initiated, and the QoS update process is released. Resource

 Step S306: When the MS initiates an RTSP (for example, a TEARDOWN message (disassembly message)) request to the PSS Server, the GGSN parses the program completion message and releases the redundant resources.

 The process of allocating bandwidth in the prior art is as follows: The user accesses the streaming media service, and the mobile terminal initiates a PDP activation process, and allocates a certain bandwidth resource to the mobile terminal after negotiation between the network devices. After the PDP context activation process is completed, the mobile terminal initiates the RTSP, and requests to interact with the streaming media server. After the RTSP interaction (the mobile terminal sends a play message) is completed, the streaming media server delivers the media stream, and the mobile terminal can receive the broadcast.

Compared with the prior art described above, it can be seen that, in the embodiment of the present invention, the existing 3G mobile terminal supports the PDP update without any modification; only appropriate changes are made on the network side; It can not only improve the user's streaming media service experience, but also save air interface resources.

 In order to further illustrate the embodiments of the present invention, the bandwidth update procedure and the resource release procedure in the foregoing embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

 Bandwidth update:

 The GGSN parses the RTSP (DESCRIBE) request response to obtain file bandwidth information: as shown in FIG. 6, the RTSP (DESCRIBE) request response includes video bandwidth information and audio bandwidth information (b=AS:XX field, in units of kbps). The GGSN determines the required bandwidth according to the sum of the values of the video+audio bandwidth, compares with the bandwidth allocated by the currently activated PDP, and determines whether the bandwidth of the mobile terminal needs to be updated by using the QoS update procedure.

 Resource release:

 The user is offline. The GGSN detects the RTP stream transmission in real time. The timeout mechanism is used. When there is no RTP stream transmission within a certain period of time, a QoS update request is initiated to restore the original bandwidth of the mobile terminal.

 The GGSN detects the RTSP (TEARDOWN) message in real time. The timeout mechanism is adopted. (Optional, when the user accesses the streaming media again, there is no need to initiate the update request again.) After a period of time, the QoS update request is initiated to restore the original bandwidth of the mobile terminal.

 FIG. 5 shows a block diagram of a wireless bandwidth allocation device 500 in accordance with an embodiment of the present invention, which includes:

 The initial allocation module 502 is configured to allocate a certain bandwidth to the mobile terminal for the streaming media service requested by the mobile terminal when the mobile terminal initiates the packet data protocol activation process;

 The update module 504 is configured to, when the mobile terminal initiates the RTSP request, instruct the GGSN to parse the response to the RTSP request to determine whether the bandwidth allocated to the mobile terminal needs to be updated, and if necessary, initiate a bandwidth update procedure to update the allocation to the mobile terminal. bandwidth.

The update module 504 can instruct the GGSN to obtain the streaming media file bandwidth information by parsing the key field in the response, and compare the allocated bandwidth resources to determine whether the update is needed. The bandwidth allocated to the mobile terminal.

 The key field may include video bandwidth information and audio bandwidth information, and the streaming file bandwidth information may be determined by the sum of the values of the video + audio bandwidth, and the allocated bandwidth resource is the bandwidth allocated by the currently activated PDP.

 In the above-mentioned wireless bandwidth allocation apparatus 500, a real-time release module (not shown) may be further included, which is used to instruct the GGSN to detect the RTP media stream of the streaming media service in real time, and when the timeout has no media stream, initiate a QoS update process to release the redundant The resource release end module (not shown) is configured to instruct the GGSN to parse the program play completion message when the mobile terminal initiates the TEARDOWN request, and release the redundant resources.

 The embodiment of the invention further provides a GGSN adapted to the mobile streaming media code stream, comprising: an initial allocation module, configured to allocate a certain bandwidth resource to the streaming media service requested to access according to the packet data protocol activation process initiated by the mobile terminal; And an update module, configured to: when the mobile terminal initiates a real-time streaming protocol request, parse the response to the real-time streaming protocol request to determine whether the bandwidth allocated to the mobile terminal needs to be updated, if necessary, initiate a bandwidth update process, and update the allocation to the mobile The bandwidth of the terminal.

 The GGSN may further include a real-time release module, configured to perform real-time detection on the real-time transport protocol media stream of the streaming media service, and initiate a service quality update process to release redundant resources when there is no media stream timeout.

 In the foregoing GGSN, the ending release module is further configured to: when the mobile terminal initiates the disassembly request, parse the program completion message, and release the redundant resources.

 From the above description, it can be seen that in the embodiment of the present invention, the existing 3G mobile terminal supports the PDP update without any modification; only the network side can make appropriate changes; the user's streaming media service experience can be improved. Also save air resources. Therefore, the embodiment of the present invention achieves the following technical effects:

The embodiment of the present invention can change the network to move according to the stream media file stream attribute in real time. The allocation of the bandwidth resources of the terminal solves the problem that the low-bandwidth mobile terminal cannot access the high-stream media file, and solves the problem that the high-bandwidth mobile terminal accesses the low-stream media file to waste bandwidth resources, and improves the user experience of the streaming media service.

 Obviously, those skilled in the art should understand that the above modules or steps of the embodiments of the present invention can be implemented by a general computing device, which can be concentrated on a single computing device or distributed in multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device, or they may be separately fabricated into individual integrated circuit modules, or Multiple of these modules or steps are fabricated as a single integrated circuit module. Thus, the invention is not limited to any particular combination of hardware and software. It is to be understood that changes in these specific embodiments will be apparent to those skilled in the art without departing from the scope of the invention.

 The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim  A wireless bandwidth allocation method, comprising:  Parsing the response of the real-time streaming protocol request, and obtaining the streaming media file bandwidth information;  It is judged based on the obtained streaming media file bandwidth information whether it is necessary to update the bandwidth allocated to the mobile terminal, and if necessary, initiates a bandwidth update procedure to update the bandwidth allocated to the mobile terminal.  The wireless bandwidth allocation method according to claim 1, wherein the obtaining the streaming media file bandwidth information by the response of the real-time streaming protocol request comprises:  Parsing the key fields in the response of the real-time streaming protocol request, and obtaining video bandwidth information and audio bandwidth information;  The video bandwidth information and the audio bandwidth information are summed to obtain streaming media file bandwidth information.  The wireless bandwidth allocation method according to claim 2, wherein the determining, according to the obtained streaming media file bandwidth information, whether to update the bandwidth allocated to the mobile terminal comprises:  Comparing the obtained streaming media file bandwidth information with the bandwidth allocated by the currently activated packet data protocol, if the two are not the same, it is determined that the bandwidth allocated to the mobile terminal needs to be updated.  The wireless bandwidth allocation method according to claim 1, wherein the bandwidth update process comprises: a quality of service update process.  The wireless bandwidth allocation method according to any one of claims 1 to 4, further comprising the following steps after the updating the bandwidth allocated to the mobile terminal:  The real-time transmission protocol media stream of the streaming media service is detected in real time. When there is no media stream timeout, the service quality update process is initiated, and the redundant resources are released. The wireless bandwidth allocation method according to any one of claims 1 to 4, characterized in that After the updating the bandwidth allocated to the mobile terminal, the method further includes the following steps: when the mobile terminal initiates the teardown request, parsing the program play completion message, and releasing the redundant resources.  7. A wireless bandwidth allocation system, comprising:  a wireless bandwidth allocation device, configured to instruct the gateway general packet radio service support node to parse the response of the real-time streaming protocol request, to determine whether the bandwidth allocated to the mobile terminal needs to be updated, and if necessary, initiate a bandwidth update process, and update the allocation to the mobile terminal. Bandwidth  The gateway general packet radio service support node is configured to parse the response of the real-time streaming protocol request according to the instruction of the wireless bandwidth allocation device of the mobile streaming media stream.  The wireless bandwidth allocation system according to claim 7, wherein the wireless bandwidth allocation device comprises:  And an update module, configured to instruct the gateway general packet radio service support node to parse the response of the real-time streaming protocol request, obtain the bandwidth information of the streaming media file, and compare the bandwidth that has been allocated to the mobile terminal, to determine whether the bandwidth allocated to the mobile terminal needs to be updated. If necessary, initiate a bandwidth update process to update the bandwidth allocated to the mobile terminal.  The wireless bandwidth allocation system according to claim 8, wherein the wireless bandwidth allocation device further comprises:  The real-time release module is configured to perform real-time detection of the real-time transmission protocol media stream of the streaming media service. When there is no media stream timeout, the service quality update process is initiated to release redundant resources.  The wireless bandwidth allocation system according to claim 8, wherein the wireless bandwidth allocation device further comprises:  And ending the release module, configured to parse the program broadcast completion message when the mobile terminal initiates the disassembly request, and release the redundant resources. The wireless bandwidth allocation apparatus according to claim 8, wherein the wireless bandwidth allocation apparatus further comprises: The initial allocation module is configured to allocate a certain bandwidth to the mobile terminal for the streaming media service requested by the mobile terminal when the mobile terminal initiates the packet data protocol activation process.  12. A gateway general packet radio service support node, comprising: an update module, configured to parse a response of a real-time streaming protocol request to determine whether a bandwidth allocated to a mobile terminal needs to be updated, and if necessary, initiate a bandwidth update. The process updates the bandwidth allocated to the mobile terminal.  The gateway general packet radio service support node according to claim 12, further comprising:  The real-time release module is configured to perform real-time detection of the real-time transmission protocol media stream of the streaming media service. When there is no media stream timeout, the service quality update process is initiated to release redundant resources.  The gateway general packet radio service support node according to claim 12, further comprising:  And ending the release module, configured to parse the program broadcast completion message when the mobile terminal initiates the disassembly request, and release the redundant resources.  The gateway general packet radio service support node according to claim 12, further comprising:  And an initial allocation module, configured to allocate a certain bandwidth to the mobile terminal for the streaming media service requested by the mobile terminal when the mobile terminal initiates a packet data protocol activation process.