JP2008146171A - Web service device and web service method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve excellent Web service responsiveness while maximizing video processing performance. <P>SOLUTION: A video processing unit 130 executes processing of video information by using CPU resources to be allotted for processing video information among CPU resources 140. A Web processing unit 120 executes other pieces of processing by using CPU resources to be allotted for processing other items of information among the CPU resources 140. A Web service request reception unit 110 receives a Web service request requesting both the processing of the video information and other items of information. The Web processing unit 120 and the video processing unit 130 acquire an amount of CPU resources needed for processing the video information and other items of information from received Web service requests, respectively. When the sum of amounts of the CPU resources to be acquired exceeds the amount of the CPU resources 140, a start evaluation unit 180 allots the CPU resources 140 to the processing other items of information and the video information while taking precedence over the processing the other items of information. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a web service device and a web service method for providing or executing a web service, particularly a web service including video information.

  In recent years, Web services that transmit data such as video and audio between a plurality of independent network devices using an Internet standard Web protocol have been introduced. In a Web service, a device that uses the service (client-side device) provides or executes a request (Web service request) for instructing specification processing, switching processing, or change processing of data to be transmitted and its transmission speed. To the device (server-side device). For example, in the processing instructed by the received Web service request, the server-side device first allocates CPU (Central Processing Unit) resources for processing large-capacity and wide-band data such as video, and the remaining CPU resources Is assigned to another process provided to the Web service, thereby controlling the allocation of CPU resources.

In addition, in order to grasp the congestion state of a specific Web service, there is a technique for detecting a protocol that is compliant with a packet flowing through a mobile network or an IP network and detecting the congestion state of the service for each protocol. In this technique, the influence on other services can be reduced by blocking a service in a congested state (see, for example, Patent Document 1).
JP 2004-201028 A

  However, in the conventional web service technology, among the processes instructed by the web service request from the user, large-capacity and broadband data processing such as video (hereinafter referred to as “video processing”), and web service The rate at which CPU resources are consumed may differ greatly from the other processing (hereinafter referred to as “general Web service processing”) provided for the above. For example, CPU resources consumed for video processing may be significantly larger than CPU resources consumed for general Web service processing. Therefore, regarding the allocation of CPU resources, when there is a fluctuation in the consumption of CPU resources in video processing, for example, a situation in which there is a change from a state where CPU resources consumed for video processing are low to a very high state, general Web service processing There is a problem that it becomes difficult to maintain good responsiveness (hereinafter referred to as “Web service responsiveness”).

  On the other hand, if CPU resources for general Web service processing are always allocated with sufficient margin, there is a problem that sufficient CPU resources cannot be allocated for video processing, and as a result, video processing performance is degraded.

  These problems cannot always be solved by blocking a Web service in a congestion state as described in Patent Document 1.

  SUMMARY An advantage of some aspects of the invention is that it provides a Web service apparatus and a Web service method capable of realizing good Web service responsiveness while maximizing video processing performance. .

  The Web service apparatus according to the present invention can use a CPU resource that can be used for either processing of video information or processing of information other than the video information, and processing of the video information among the available CPU resources. A video processing unit that executes processing of the video information using an allocated CPU resource, and of the other information using a CPU resource allocated to the processing of the other information among the available CPU resources. From the Web processing unit that executes the processing, the reception unit that receives both the processing of the video information and the processing of other information other than the video information, and the received Web service request, An acquisition unit that acquires the amount of CPU resources required for processing and the amount of CPU resources required for processing the other information, and the CPU resource that can be used is the sum of the amount of CPU resources acquired When excess amount, while giving priority to the processing of the other information, the processing of the processing and the image information of the other information, employs a configuration comprising a control unit for assigning the available CPU resources.

  The Web service method of the present invention is a CPU resource that can be used in either video information processing or other information processing other than the video information, and of the available CPU resources, the video information processing. A video processing unit that executes processing of the video information using an allocated CPU resource, and of the other information using a CPU resource allocated to the processing of the other information among the available CPU resources. A web service method that provides a web service using a web service device that includes a web processing unit that executes processing, and requests both video information processing and processing of other information other than the video information A reception step for receiving a Web service request to be received, an amount of CPU resources required for processing the video information, and processing for the other information from the received Web service request. An acquisition step for acquiring the amount of CPU resources to be acquired, and when the sum of the amounts of acquired CPU resources exceeds the amount of available CPU resources, the other information is prioritized and the other information is prioritized. An allocation step of allocating the usable CPU resources to the information processing and the video information processing.

  According to the present invention, it is possible to realize good web service responsiveness while maximizing video processing performance.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a block diagram showing a configuration of a Web service apparatus 100 according to an embodiment of the present invention.

  The Web service apparatus 100 provides or executes a Web service to an external device connected via a network such as an IP network or a mobile network. The Web service apparatus 100 is a server device that distributes Web services to client devices, for example.

  In FIG. 1, a Web service apparatus 100 includes a Web service request accepting unit 110, a Web processing unit 120, a video processing unit 130, a CPU resource 140, a scheduling rule table 150, a timing generation unit 160, and an operating system 170. And a start evaluation unit 180.

  The web service request accepting unit 110 as a accepting unit accepts a web service request that requests both video information processing and processing of information other than video information (hereinafter simply referred to as “other information”). The accepted web service request can be transmitted from an external device connected to the web service apparatus 100 via a network such as an IP network or a mobile network, for example. The web service request accepting unit 110 outputs the accepted web service request to the web processing unit 120.

  Here, “Web service” means, for example, a service provided or executed by transmitting various types of information such as video, audio, and text using an Internet standard Web protocol. In the present embodiment, a case where a “Web service” is provided or executed by processing at least video information will be described as an example. Examples of protocols used in the “Web service” include SOAP (Simple Object Access Protocol), WSDL (Web Service Description Language), and UDDI (Universal Description, Discovery, and Integration). In these protocols, XML (Extensible Markup Language) can be used to describe messages and definitions.

  The “Web service request” means various requests related to the Web service set by the user of the external device. As described above, the “Web service request” requests both video information processing and other information processing. Examples of the former include increasing and decreasing the resolution of video information, switching video information, and adding and deleting information incidental to video information. On the other hand, examples of the latter include an increase and a decrease in the transmission speed of the Web service, and addition and deletion of voice information and text information.

  The Web processing unit 120 as an acquisition unit acquires the amount of CPU resources required for processing other information from the Web service request input from the Web service request reception unit 110. The Web processing unit 120 outputs the acquired amount of CPU resources to the scheduling rule table 150. As a result, the CPU resource per unit process of other information in the Web service request is specified in the scheduling rule table 150. Further, the Web processing unit 120 outputs the Web service request input from the Web service request receiving unit 110 to the video processing unit 130.

  The Web processing unit 120 executes processing of other information using the CPU resources allocated to processing of other information among the CPU resources 140. These processes are executed by, for example, various applications required for the web service, and the responsiveness to the user of the web service is ensured by these processes. Processing of other information in the Web processing unit 120 is controlled by the scheduler 171 of the operating system 170 and the start evaluation unit 180 referring to the scheduling rule table 150. This control will be described in detail later.

  The video processing unit 130 as an acquisition unit acquires the amount of CPU resources required for processing video information from the Web service request input from the Web processing unit 120. The video processing unit 130 outputs the acquired amount of CPU resources to the scheduling rule table 150. As a result, the CPU resource per unit processing of video information in the Web service request is specified in the scheduling rule table 150.

  The video processing unit 130 uses the CPU resources allocated to the video information processing among the CPU resources 140 to execute the video information processing. Similar to the processing of other information in the Web processing unit 120, the processing of video information in the video processing unit 130 is controlled by the scheduler 171 of the operating system 170 and the start evaluation unit 180 referring to the scheduling rule table 150. This control will also be described in detail later.

  Here, a Web service corresponding to the Web service request is formed by the other information processed by the Web processing unit 120 and the video information processed by the video processing unit 130. That is, video information linked to the web service and other information necessary for the web service are formed, respectively, and web service information to be provided to the external device is formed.

  The CPU resource 140 includes, for example, a memory, a swap area, a register set, and the like. The CPU resource 140 can be allocated and used for processing in the Web service apparatus 100, that is, processing of video information and processing of other information. The CPU resource 140 appropriately notifies the scheduling rule table 150 of CPU resources that can be allocated to either video information processing or other information processing, that is, the amount of available CPU resources. Note that the amount of the CPU resource 140 can be increased or decreased by customization.

  The scheduling rule table 150 holds the amount of CPU resources required for processing other information input from the Web processing unit 120 and the amount of CPU resources required for processing video information input from the video processing unit 130. That is, the scheduling rule table 150 includes the amount of CPU resources per unit process of other information specified by the Web processing unit 120 and the amount of CPU resources per unit process of video information specified by the video processing unit 130. Hold the allocation ratio. As described above, the scheduling rule table 150 can hold the processing load of Web service information and the processing load of video information that change every moment according to the Web service request, and the allocation ratio thereof in real time.

  On the other hand, since the amount of the CPU resource 140 is appropriately notified to the scheduling rule table 150, the scheduling rule table 150 indicates the amount of CPU resource required for processing corresponding to the Web service request, that is, CPU resource required for processing other information. It can be determined whether or not the sum of the amount of CPU resources and the amount of CPU resources required for processing video information exceeds the amount of CPU resources 140. That is, the scheduling rule table 150 can know whether or not the processing load specified by the Web processing unit 120 and the video processing unit 130 is within the range of the processing capability of the Web service apparatus 100.

  The timing generation unit 160 generates, for example, a unit processing of other information in the Web processing unit 120 and a start timing of unit processing of video information in the video processing unit 130 at predetermined time intervals (processing increments). The timing generation unit 160 outputs the generated start timing of each unit process to the scheduler 171 of the operating system 170. Here, “unit processing” means processing requested by one Web service request.

  The operating system 170 comprehensively manages the entire Web service apparatus 100 by providing basic functions such as input / output of various information and management of storage media.

  The operating system 170 includes a scheduler 171. The scheduler 171 notifies the Web processing unit 120 and the video processing unit 130 of the start timing of the unit processing input from the timing generation unit 160. That is, the scheduler 171 schedules unit processing in the Web processing unit 120 and the video processing unit 130, particularly start of unit processing, based on the start timing input from the timing generation unit 160. In addition, the scheduler 171 outputs the start timing of the unit process input from the timing generation unit 160 to the start evaluation unit 180.

  The start evaluation unit 180 as a control unit controls the start of unit processing in the Web processing unit 120 and the video processing unit 130 with reference to the scheduling rule table 150 for each unit processing start timing input from the scheduler 171. .

  More specifically, when the sum of the amount of CPU resources required for processing other information and the amount of CPU resources required for processing video information is within the range of the amount of CPU resources 140, the start evaluation unit 180 The Web processing unit 120 and the video processing unit 130 start processing by assigning CPU resources 140 as specified in the scheduling rule table 150, that is, as requested by the Web service request.

  On the other hand, when the sum of the amount of CPU resources required for processing other information and the amount of CPU resources required for processing video information exceeds the amount of CPU resources 140, the start evaluation unit 180 processes other information. , The CPU resource 140 is allocated to the Web processing unit 120 and the video processing unit 130 to start processing.

  Hereinafter, the CPU resource 140 allocation processing by the start evaluation unit 180 will be described more specifically with reference to FIG.

  2A to 2C are diagrams illustrating an example of CPU resource 140 allocation processing by the start evaluation unit 180.

  As shown in FIG. 2A, when the sum of the amount of CPU resources required for processing other information and the amount of CPU resources required for processing video information is within the range of the amount of CPU resources 140, start evaluation is performed. The unit 180 causes the Web processing unit 120 and the video processing unit 130 to allocate the CPU resource 140 and start unit processing as specified in the scheduling rule table 150, that is, as requested by the Web service request.

  As shown in FIG. 2B, when the sum of the amount of CPU resources required for processing other information and the amount of CPU resources required for processing video information exceeds the amount of CPU resources 140, the start evaluation unit 180 At this time, the CPU resource 140 is allocated only to other information processing. In addition, the start evaluation unit 180 assigns the CPU resource 140 to the processing of the video information that is not assigned at the current process start timing at the next process start timing. In short, the start evaluation unit 180 permits only the start of processing of other information at the current processing start timing, while prohibiting the start of processing of video information and waiting until the next processing start timing. It should be noted that the CPU resource 140 may be assigned all at once at the processing start timing after the next time, or divided and assigned at a plurality of processing start timings after the next time for the processing of the video information to be waited. May be.

  Alternatively, as shown in FIG. 2C, when the sum of the amount of CPU resources required for processing other information and the amount of CPU resources required for processing video information exceeds the amount of CPU resources 140. The start evaluation unit 180 first allocates the CPU resource 140 to other information processing at the current processing start timing, and allocates the remaining CPU resources, that is, from the CPU resource 140 to other information processing, to the video information processing. Allocate CPU resources excluding CPU resources to be allocated. In addition, the start evaluation unit 180 allocates the CPU resource 140 to processing of video information that cannot be allocated at the current processing start timing, that is, processing of excess video information at the next processing start timing. In short, at the current processing start timing, the start evaluation unit 180 starts processing by allocating a CPU resource that can be allocated to other information processing after assigning it to the processing of the video information, and starts the subsequent processing. At the timing, the CPU resource 140 is allocated to the processing of the excess video information and the processing is started.

  In this way, the allocation of the CPU resources required for processing other information and the CPU resources required for processing video information can be reviewed at each unit processing start timing in the Web service apparatus 100. Therefore, it is possible to prevent the CPU resource allocation required for processing the video information from becoming excessively large (processing fluctuation), and to ensure the responsiveness of the user in the Web service.

  The configuration of the Web service device 100 has been described above.

  Hereinafter, the operation of the Web service apparatus 100 configured as described above will be described in detail. Here, a case where the Web service apparatus 100 is applied to the monitoring IP camera system 200 will be described as an example. In this case, the Web service includes provision of video acquired by the monitoring IP camera, for example, JPEG video, and provision of pan / tilt control of the camera platform.

  Prior to the description of the operation, first, the configuration of the monitoring IP camera system 200 will be briefly described.

  FIG. 3 is a diagram illustrating the overall configuration of the monitoring IP camera system 200.

  As shown in FIG. 3, the monitoring IP camera system 200 includes a monitoring monitor and an operation console in which a plurality of monitoring IP cameras including the monitoring IP camera 210 includes a network 240 such as an IP network or a mobile network. It is connected to the monitoring station 250. The monitoring station 250 is an external device that can transmit a web service request to the monitoring IP camera 210 and receive and display a video distributed in response to the web service request.

  The monitoring IP camera 210 includes a camera body 220 and a Web service distribution control unit 230. These components and the peripheral components will be described with reference to FIG. FIG. 4 is a block diagram illustrating the Web service distribution control unit 230 and its peripheral components.

  The camera body 220 has a monitoring pan / tilt control function, can control the lens 221 vertically and horizontally, and has a viewing angle of 360 degrees horizontally. The camera body 220 acquires video information while being pan / tilt controlled by the pan / tilt driving unit 231. The camera body 220 outputs the acquired video information to the video processing unit 130 via the Web processing unit 120.

  The Web service distribution control unit 230 includes a pan / tilt driving unit 231 that performs pan / tilt driving of the camera body 220 in addition to the configuration of the Web service device 100 of FIG. The pan / tilt driving unit 231 performs pan / tilt control of the camera body 220 while being controlled in accordance with an instruction signal from the web processing unit 120 that has received the web service request.

  The monitoring IP camera 210 is provided with a Web communication unit 232. The web communication unit 232 receives the web service request from the monitoring station 250 via the network 240 and outputs the received web service request to the web service request reception unit 110. This Web service request includes, for example, an instruction for pan / tilt control of the camera body 220 and an instruction for switching the monitoring IP camera from which the video is acquired. In addition, the Web communication unit 232 transmits a Web service provided or executed according to the received Web service request, for example, a JPEG video acquired by the monitoring IP camera 210 via the network 240.

  In the monitoring IP camera system 200 configured as described above, the monitoring station 250 transmits a Web service request to the monitoring IP camera 210 via the network 240. Upon receiving this Web service request, the monitoring IP camera 210 acquires the monitoring video according to the Web service request, and distributes the acquired monitoring video via the network 240. In this way, the web service is continuously provided or executed.

  Here, when a web service request including, for example, a pan instruction and a JPEG video image quality improvement setting instruction is issued from the monitoring station 250, CPU resources required for processing video information temporarily increase (processing fluctuation). If both of these processes are performed simultaneously, the processing capacity of the CPU resource 140 may be exceeded. Even in such a case, CPU resources for the pan / tilt control service continue to be secured by the Web processing unit 120, the scheduler 171, and the start evaluation unit 180 referring to the scheduling rule table 150. It becomes possible to always maintain a certain responsiveness with respect to pan / tilt control for the operator.

  As described above, according to the present embodiment, the Web service request receiving unit 110 receives a Web service request for requesting both processing of video information and processing of information other than video information, and the Web processing unit 120. Obtains the amount of CPU resources required for processing other information from the accepted Web service request and designates it in the scheduling rule table 150, and the video processing unit 130 determines the video information from the accepted Web service request. The amount of CPU resources required for processing is acquired and specified in the scheduling rule table 150. When the sum of these specified amounts of CPU resources exceeds the amount of CPU resources 140, other information is obtained. The CPU resource 140 is allocated to the Web processing unit 120 and the video processing unit 130 and the processing is started while giving priority to the above processing. Thereby, even when the CPU resources required for processing the video information increase rapidly, it is possible to provide or execute the Web service without deteriorating the operation responsiveness to the user.

  In addition, according to the present embodiment, the start evaluation unit 180 reviews the allocation ratio of the CPU resources 140 with reference to the scheduling rule table 150 for each of the plurality of processing start timings. It is possible to optimize the processing performance with other information processing other than the above.

  In particular, in the delivery of a web service including video, the responsiveness to the user can be optimized while providing or executing a high-quality web service. That is, when connecting a plurality of independent video networks using an IP network such as a public network, an efficient video transmission process can be realized on the transmission side.

  Note that although cases have been described with the present embodiment where a Web service including video information processing is provided or executed, the present invention is not limited to this. The present invention can also be applied when providing or executing a Web service including voice information and other information. Even in this case, the same effect as the above embodiment can be obtained.

  Further, the Web service apparatus and Web service method according to the present embodiment can naturally function as a Web service mediating apparatus that mediates between the Web service distribution source and the Web service distribution destination, that is, a network relay apparatus. is there.

  The Web service device and Web service method according to the present invention have the effect of realizing good Web service responsiveness while maximizing video processing performance, and provide a Web service, particularly a Web service including video information. Alternatively, it is useful as a Web service device and Web service method to be executed.

The block diagram which shows the structure of the web service apparatus which concerns on one embodiment of this invention (A) The figure which shows an example of the CPU resource allocation process by a start evaluation part, (B) The figure which shows the other example of the CPU resource assignment process by a start evaluation part, (C) The CPU resource assignment process by a start evaluation part The figure which shows other example of The figure which shows the whole structure of the monitoring IP camera system using the web service apparatus of FIG. Block diagram showing a Web service distribution control unit and its peripheral components

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Web service apparatus 110 Web service request reception part 120 Web processing part 130 Video processing part 140 CPU resource 150 Scheduling rule table 160 Timing generation part 170 Operating system 171 Scheduler 180 Start evaluation part 200 Monitoring IP camera system 210 Monitoring IP camera 220 Camera body 221 Lens 230 Web service distribution control unit 231 Pan / tilt drive unit 232 Web communication unit 240 Network 250 Monitoring station

Claims (7)

CPU resources that can be used in either video information processing or other information processing other than the video information;
A video processing unit that executes the processing of the video information using a CPU resource allocated to the processing of the video information among the available CPU resources;
A web processing unit that executes processing of the other information using a CPU resource allocated to processing of the other information among the available CPU resources;
A reception unit that receives a Web service request that requests both processing of video information and processing of information other than the video information;
An acquisition unit for acquiring an amount of CPU resources required for processing the video information and an amount of CPU resources required for processing the other information from a web service request received;
When the total amount of CPU resources acquired exceeds the amount of available CPU resources, the use of the other information processing and the video information processing is performed while giving priority to the processing of the other information. A controller that allocates possible CPU resources;
A web service device comprising: The controller is
Allocating the usable CPU resources to the processing of the other information and the processing of the video information at a plurality of processing start timings, thereby causing the Web processing unit and the video processing unit to start processing;
The Web service apparatus according to claim 1, wherein: The controller is
When the total amount of CPU resources to be acquired exceeds the amount of available CPU resources, the available CPU resources are allocated to the processing of the other information at the current processing start timing, while the video Does not allocate the available CPU resources for information processing;
The Web service apparatus according to claim 2, wherein The controller is
Assigning the available CPU resources to the processing of the video information at the processing start timing after the next time,
The Web service apparatus according to claim 3, wherein: The controller is
When the total amount of CPU resources to be acquired exceeds the amount of usable CPU resources, the usable CPU resources are allocated to processing of the other information at the current processing start timing, and the video information CPU resources excluding CPU resources allocated to the processing of the other information from the available CPU resources are allocated to
The Web service device according to claim 2, wherein The controller is
Assigning the available CPU resources to processing video information that cannot be assigned at the current process start timing at the process start timing after the next time;
6. The Web service device according to claim 5, wherein CPU resources that can be used in either video information processing or other information processing other than the video information, and CPU resources allocated to the video information processing among the available CPU resources. A video processing unit that executes processing of the video information; and a Web processing unit that executes processing of the other information using a CPU resource allocated to the processing of the other information among the available CPU resources. A web service method for providing a web service using a web service device comprising:
Receiving a web service request for requesting both video information processing and information processing other than the video information; and
An acquisition step of acquiring an amount of CPU resources required for processing the video information and an amount of CPU resources required for processing the other information from an accepted Web service request;
When the total amount of CPU resources acquired exceeds the amount of available CPU resources, the use of the other information processing and the video information processing is performed while giving priority to the processing of the other information. An allocation step of allocating possible CPU resources;
A web service method comprising:

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