TWI573420B - Service node selection system for content delivery network - Google Patents

Description

Service node selection system for content delivery network

The present invention is a service node selection system, and more particularly to a service node selection system for a content delivery network.

In the conventional network system, when the main server receives the connection request from the use end, most of the analysis analyzes the access location of the use end, and selects a service server that is closer to the access location to provide the service server. Connection service.

In general, a service node that is located closer to the geographic location of the user can provide better connection services. However, in the actual connection state, the service quality of each service node depends on whether the service server is busy, whether the network quality is good, and whether the service server stores the content that the user wants to access. When the service server closer to the user end has poor service quality, the conventional network system still assigns the service server as a service node. In other words, the conventional service node selection method is in practice and cannot select a service server that can provide better service capabilities.

In summary, how to provide a technical means for selecting a better service server is a technical problem that needs to be solved in the field.

In order to solve the problems disclosed above, an object of the present invention is to provide a service node selection system for selecting an appropriate service node by analyzing an access record of a use end.

To achieve the above object, the present invention proposes a service node selection system for a content delivery network. The system includes a data processor and a smart redirect server. The smart redirect server is used to communicate with the external user and receives the service request from the user. The data processor connects to the smart redirect server, and obtains and analyzes the access record of the use end from the external service node server to provide the analysis result, so as to receive the specific service request according to the analysis result. The service node server acts as a service node.

In summary, the service node selection system of the present invention can select a service node with better service resources by analyzing the access record of the use end, compared to the prior art, which only selects the service node according to the access location of the use end. And provide better service quality.

1‧‧‧Service Node Selection System

11‧‧‧Smart redirect server

12‧‧‧ Data Processor

2‧‧‧Use side

3‧‧‧Service node server

Figure 1 is a system diagram of a service node selection system for a content delivery network of the present invention.

The specific embodiments are described below to illustrate the embodiments of the invention, but are not intended to limit the scope of the invention.

Please refer to FIG. 1 , which is a service node selection system 1 for a content delivery network (Content Deliver Network, CDN for short). It includes a data processor 12 and a smart redirect server 11. The smart redirect server 11 is configured to communicate with the external user 2 and receive the service request of the user 2. The data processor 12 is connected to the smart redirect server 11 and further retrieves and analyzes the access record of the user 2 from the external service node server 3 to provide an analysis result, so as to receive the service request of the user terminal 2, A specific service node server 3 is selected as a service node based on the analysis result.

The data processor 12 and the smart redirecting server 11 can be electronic devices with computing power (for example, digital circuits, computer devices) or software modules installed on the computer device. The aforementioned software modules can be implemented by ASP, C/C++/C#, JAVA, Python, PHP, Perl, etc., but the category of the programming language is not limited thereto. The aforementioned terminal is an electronic device (for example, a computer device, a mobile communication device, etc.) having a network connection capability.

For example, when the use terminal 2 makes a request for the content of the table 1 to the smart redirect server 11, the smart redirect server 11 adjusts the contents of Table 2 as described above and transmits it to the data processor 12.

Next, the data processor 12 queries the previous access record of the user 2 (Table 3). The access record contains the following fields: service node server information (Edge-1~Edge_4), IP information, URL (URL) information, cache status information, service time information, log time (log time) information.

Then, the weight value of the cache state is set to W (W is a value, which is set to 20 in this embodiment, but the value content is not limited thereto). If the state is "Yes", the score is 20 points; if the status is "No" Then scored 0 points.

Next, the weight of the log time is set to W ₁ ( W ₁ is a numerical value, which is set to 20 in this embodiment, but the numerical content is not limited thereto), and is normalized by the formula (1): Where x ' is the result of the normalization operation, x is the difference between the log time and the current time, min ₁ is the minimum log time of the homogeneous service node server 3, and MAX ₁ is the homogenous service node server 3 The maximum log time. The aforementioned homogeneity is to determine whether it is a similar or identical service node, domain or web address.

Next, the weight W _{2 of the} service time is set ( W ₂ is a numerical value, which is set to 20 in this embodiment, but the numerical content is not limited thereto), and is normalized by the formula (2): Where y ' is the result of the normalization operation, y is the service time, min ₂ is the homogeneity of the service time minimum of the service node server 3, and MAX ₂ is the homogeneity of the service time of the service node server 3 Maximum value. The aforementioned homogeneity is to determine whether it is a similar or the same service node, domain or web address.

After analyzing the processing via the aforementioned program, the data processor 12 provides the analysis results as shown in Table 4:

Then select the candidate list as shown in Table 5 according to the IP attributes (for example, the same subnet):

The data processor 12 further presets a threshold (Threshold) to initially screen out a preferred service node server (in this embodiment, the threshold is 60 points, but the value is not limited thereto), after the initial screening, the first Filter out "Edge_3" and "Edge_3", and then judge the size of the two to know that the service node server 3 of the number "Edge_3" is a service node that can provide suitable services.

At this time, the data processor 12 returns the service node information as shown in Table 6 to the smart redirect server 11, and after the smart redirect server 11 adjusts part of the content, the data of the table 7 is transmitted to the user 2 for use. 2 Know what the service node is. When the user connects to the service node server 3 of the number "Edge_3", the service node server 3 of the number "Edge_3" transmits the access record of the terminal 2 (Table 8) to the data processor 12. Store for use as the basis for the next selection analysis.

The detailed description of the preferred embodiments of the present invention is intended to be limited to the scope of the invention, and is not intended to limit the scope of the invention. The patent scope of this case.

1‧‧‧Service Node Selection System

11‧‧‧Smart redirect server

12‧‧‧ Data Processor

2‧‧‧Use side

3‧‧‧Service node server

Claims (9)

A service node selection system for a content delivery network, comprising: a smart redirect server for communicating with an external user to receive a service request of the user; and a data processor connecting the smart redirect server The data processor obtains and analyzes the access record of the use end from an external plurality of service node servers to provide an analysis result, so as to select a specific service node servo according to the analysis result upon receiving the request from the use end. The device acts as a service node; wherein the access record includes a cache status, log time information, and service time. The service node selection system of claim 1, wherein the data processor further weights the cache state, the log time information, and the service time to analyze the service request according to the weighting process The result is to select the particular service node server as the service node. The service node selection system of claim 2, wherein the data processor further weights the presence or absence of the cache state. The service node selection system according to claim 2, wherein the data processor further normalizes the log time according to the following formula: Where x ' is the result of the normalization operation, x is the difference between the log time and the current time, min ₁ is the homogeneity of the log time minimum of the service node server, and MAX ₁ is the homogeneous server node of the service. The maximum log time, W ₁ is the weight value. The service node selection system according to claim 4, wherein the homogeneity is determined to be similar or The same service node, domain, or URL. The service node selection system according to claim 2, wherein the data processor further normalizes the service time according to the following formula: Where y ' is the result of the normalization operation, y is the service time, min ₂ is the homogeneity of the minimum service time of the service node server, and MAX ₂ is the homogeneity of the service node server. Value, W ₂ is the weight value. The service node selection system of claim 6, wherein the homogeneity determines whether the service node, the domain or the website is a similar or the same. The service node selection system of claim 1, wherein the data processor further selects, by the smart redirect server, a network address of the service node server that is selected as the service node. The service node selection system of claim 2, wherein the data processor further filters the service node servers via a threshold.