KR101375133B1 - Mobile sns intergrated gateway - Google Patents

Abstract

An integrated SNS gateway of an embodiment of the present invention includes: a broker server for communicating with at least one client which is connected through a network with an integrated SNS protocol and relaying message transmission among SNS servers; an account manager for receiving message and ID information of a client from the broker server and managing an account of the client; a data manager for receiving ID authentication and message request of the account manager and managing data of cache server and synchronization server; the synchronization server for performing synchronization according to a command of the data manager; the cache server for caching according to a command of the data manager; and a service adaptor for receiving a command of the synchronization server and cache server and performing communication according to an individual protocol with each SNS server. [Reference numerals] (5) SNS server 1; (AA,BB,CC) Integrated protocol; (DD) SNS server 2; (EE) SNS server 3

Description

Integrated SNS Gateway {Mobile SNS Intergrated Gateway}

The present invention relates to an integrated SNS gateway connecting one or more content servers and a mobile terminal.

As the use of smart devices surges, mobile traffic is growing exponentially. In particular, social networking service (SNS) traffic is rapidly increasing among mobile traffic.

As a way to cope with increasing SNS traffic, many mobile SNS applications are currently operating in a push method.

SNS applications based on the push method has a very large difference in the nature of providing the users are using a number of SNS applications, each SNS application to access the SNS server individually to update the information in a 1: 1 communication method. The 1: 1 communication method has a problem such that traffic is concentrated and response speed is slowed down as the number of users increases.

This communication method is similar to the initial web or FTP that communicated in a 1: 1 manner. As the usage of the web increases, the web has introduced a method for increasing the response speed of the web and reducing traffic. The most representative example is web caching. By installing a web caching device at the point where user traffic gathers, it is possible to reduce the response time and traffic by providing the user with the information which is already taken from the web server.

In this way, SNS can improve communication performance by placing any device in between. However, since the communication protocol of each SNS is not a communication protocol according to the standard, it is difficult to apply the above method because each SNS uses a different self communication protocol.

Therefore, the present invention proposes an application gateway method for improving communication performance of SNS.

An embodiment of the present invention provides an integrated SNS gateway that communicates with one or more SNS servers in a separate protocol, communicates with a client through an integrated SNS protocol, and performs synchronization or caching in the process to reduce traffic and improve response speed. I would like to suggest.

The integrated SNS gateway of the present embodiment communicates with at least one client connected to a network through an integrated SNS protocol, receives a message and ID information of the client from the broker server, and relays the message transfer between the plurality of SNS servers. An account manager managing an account of the data manager; And a cache server for caching functions according to the command of the data manager, and a web service adapter for receiving commands from the synchronization server and the cache server and communicating with each SNS server according to a separate protocol.

By the integrated SNS gateway of the proposed embodiment of the present invention, a synchronization function and a caching function are performed between the client and the SNS server, thereby reducing traffic and improving response speed.

1 is a diagram schematically illustrating communication between a client, a gateway, and an SNS server according to an embodiment of the present invention.
2 is a diagram schematically illustrating a configuration of a gateway according to an embodiment of the present invention.
3 is an object tree for each content of each SNS server according to an embodiment of the present invention.
4 is a server sequential diagram showing an operation process between each component of a gateway according to an embodiment of the present invention.
5 is a flowchart illustrating an operation process between components of a gateway server while updating data in an integrated application according to an embodiment of the present invention.
6 is a sequential diagram of a synchronization method using SyncML according to an embodiment of the present invention.
7 illustrates a configuration of a topic tree according to an embodiment of the present invention.
8 illustrates a packet exchange method according to a quality of service (Qos) level.
9 illustrates a message delivery process of an MQTT according to an embodiment of the present invention.
10 illustrates an actual network experiment configuration for the design of the integrated SNS protocol according to an embodiment of the present invention.
FIG. 11 shows an analysis result of the average end-to-end delay of the experiment of FIG. 10.
12 shows the analysis results of packet loss in the experiment of FIG. 10.

Hereinafter, the present embodiment will be described in detail with reference to the accompanying drawings. It should be understood, however, that the scope of the inventive concept of the present embodiment can be determined from the matters disclosed in the present embodiment, and the spirit of the present invention possessed by the present embodiment is not limited to the embodiments in which addition, Variations.

1 is a diagram schematically illustrating communication between a client 10, a gateway 1, and a network server according to an exemplary embodiment of the present invention.

Referring to FIG. 1, the present embodiment includes a client 10 communicating with the gateway 1 through an integrated protocol, a gateway 1 improving communication performance at an intermediate position between the client 10 and the SNS server 5. The SNS server 5 communicates with the gateway 1 in a respective protocol manner.

These configurations will be described in detail as follows.

The client 10 may be configured as a portable terminal, and the terminal is provided with an integrated SNS application, thereby communicating with the gateway 1 through the integrated SNS protocol.

The integrated SNS application is to provide a function provided by each existing SNS application in one application.

In the embodiment of the present invention, the integrated SNS protocol is based on the communication method of the push notification service method, and the MQTT (Message Queuing Telemetry Transport) protocol, which is an open protocol announced by IBM, is used, but it is obvious that other protocol methods can be used. Do. MQTT is composed of broker server 101, Publish client and Subscribe client. Detailed design will be described later.

In addition, the SNS servers 5 communicate with the client 10 through the gateway 1 in a respective protocol manner.

Currently, the SNS servers 5 use different self-communication protocols for each SNS, and most SNS servers 5 do not disclose protocol protocols, but can analyze the protocols by protocol reverse engineering methods.

For example, facebook's protocol is based on the HTTP protocol by protocol reverse engineering.

In addition, the gateway 1 communicates with the integrated SNS application of the client 10 by the integrated SNS protocol method, and communicates with the SNS server 5 by the self-protocol method of the SNS server 5 to communicate between different protocols. It is possible to perform the synchronization, caching, integrated authentication function at the location of the communication between the client 10 and the SNS server (5).

In detail, the gateway 1 stores user information, stores or provides data at the request of the integrated SNS application, accesses the SNS server 5 directly, updates the user's SNS information, and obtains the latest information. Provide it to the application. The gateway 1 also performs account management and security processing functions in accordance with multiple user connections. The user accesses the SNS periodically using the user account information to update the information and obtain the latest information.

In this process, the gateway 1 minimizes the load of the integrated SNS application and improves communication performance through a cache function for periodically storing data on the SNS periodically using a user account information and a synchronization function for transmitting only changed data. To communicate.

Since the embodiments of the present invention only deal with communication performance enhancements later, the cache function and the synchronization function are mainly referred to, and the account management or security function is minimally mentioned in the range that does not cause technical content delivery.

The synchronization function is a method for maintaining the same data between devices or programs at different locations. This feature is an improvement over updating all data without considering differences to keep the same data.

For example, in the case of the existing Facebook communication, when the server is connected, all of the friend lists are updated again. However, if the synchronization function is used, only the changed part of the existing friend list is transmitted and matched to improve the response speed and the traffic performance.

That is, the gateway 1 and the SNS server 5 communicate with each other in the conventional manner to maintain the latest information, and the latest information is compared with the existing information to calculate the changed information. Only changed information can be delivered to integrated SNS application to increase traffic and response speed.

When synchronizing, it is possible to easily calculate the synchronization area by defining the information that can improve the performance by the synchronization function for each SNS server 5 and configuring the synchronization object as an object tree.

When the caching function is described, the contents transmitted to the integrated SNS application are copied and stored. If the same contents are subsequently requested by the SNS application, the SNS server 5 immediately sends the stored data without receiving the data. .

This approach is the same as traditional Internet caching, which reduces the load on the SNS server 5, reduces the traffic volume, and reduces the response time. In order for this method to be possible in the SNS gateway 1, a method for identifying whether the same data is provided for the object provided to the SNS should be introduced. In the case of the web, URLs play this role. Also, for each object, it should be possible to calculate the validity of the object over time. In the case of the web, the lifetime of the object is transmitted and used in the HTTP protocol.

As explained above, Facebook's protocol is based on the HTTP protocol. Therefore, even in a portable terminal, even if the existing web caching apparatus is basically used, the communication performance is improved. Therefore, the gateway 1 of the present invention can also utilize the existing web caching function. However, in order to provide integrated SNS application, the existing web caching result must be converted into integrated protocol and provided. Since a lot of SNS data already contains multimedia data such as photos and videos, this web caching function will be less effective.

In addition, caching is possible for objects that can be cached based on the results of SNS protocol analysis along with the use of existing web caching functions. For example, when the existing SNS server 5 uploads a picture to its own server, the result is sent back to complete its own page. This approach results in uploading and re-downloading of pictures, causing unnecessary traffic, and the gateway 1 reduces this unnecessary traffic.

The integrated authentication function is to integrate the authentication to one or more SNS server (5) individually, to replace the high-level authentication by gathering the authentication required from multiple terminals into one. In this process, the gateway 1 also performs account management and security processing according to multiple user accesses.

2 is a diagram schematically showing the configuration of a gateway 1 according to an embodiment of the present invention.

Referring to FIG. 2, the gateway 1 of this embodiment is a broker server (broker Server) 101 that relays message transmission between the client 10 and the SNS server 5, and a security that protects information of the client 10. A data manager (Data Manager) that manages data such as a manager (Security Manager) 102, an account manager (103) managing an account of the client 10, a cache server 106, a synchronization server 105, and the like. 104, a synchronization server (Synchronization Server 105) responsible for the synchronization function, a cache server (Cache Sever, 106) responsible for the caching function, and can be individually connected according to the protocol of each SNS server (5). It consists of a Web Service Adapter (107).

Briefly describing these configurations, when the broker server 101 refers to the SNS server 5 and 5 as the publish client and the client 10 as the subscribe client, the publish client and the subscribe client transmit messages to each other. It plays a role of relaying between them in the middle.

In the embodiment of the present invention, the push-based communication between the integrated SNS application and the gateway 1 uses the MQTT protocol developed as an open source project, the broker server 101 uses Mosquitto, but is not limited thereto. Do.

 Since the MQTT provides only a push-based transmission method, an integrated SNS protocol should be designed based on this. Details of the broker server 101 will be described later as the integrated SNS protocol design.

In addition, the security manager, account manager 103, and data manager 104 provides a security function, account management function, data management function, respectively. Each function is a component developed according to the detailed functions defined by itself in order to operate as the gateway 1.

In addition, the cache server 106 copies and stores the contents transmitted to the integrated SNS application. If the same contents are subsequently requested by the SNS application, the cache server 106 does not receive the data from the SNS server 5 and immediately stores the stored data. send.

The cache server 106 may use the Squid cache server 106 developed as an open source project. Squid server is a server for cache and proxy. As described above, since the existing SNS protocol is made based on HTTP, the web caching function can be used as a base, and the function of the Squid server can be used. In addition, it is possible to improve the caching in the SNS protocol by improving the portion of the Squid cache server 106 to determine whether to cache.

In addition, the synchronization server 105 is a method for maintaining the same data between devices or programs located at different locations, and in the embodiment of the present invention, only the portions changed between the client 10 and the SNS server 5 are exchanged. Receiving receiving

The synchronization server 105 may utilize a Funambol synchronization engine developed as an open source project. The Funambol synchronization engine was developed based on the SyncML protocol, a synchronization standard protocol. The engine provides a way to develop adapters separately for objects for synchronization. The gateway 1 has been improved to construct an object tree for SNS objects and to calculate changed information based on the tree.

3 illustrates an object tree for each content of each SNS server 5 according to an embodiment of the present invention.

E.g. In the case of the Facebook server, a tree can be constructed using the extension of the content type (eg, image, text, flash, video) as one object.

In addition, the web service adapter 107 allows the gateway 1 to access each SNS server 5 using a unique protocol used for each SNS service. The web service adapter 107 must be developed for each SNS and each SNS. Develop using the development platform provided by.

For example, Facebook's web service adapter 107 is a Facebook SDK provided by Facebook.

FIG. 4 is a server sequential diagram showing an operation process between each component of the gateway 1 according to an embodiment of the present invention, and FIG. 5 is a diagram illustrating a gateway (while updating data in an integrated application according to an embodiment of the present invention). 1) It is a flow chart showing the operation process between each component of the server.

4 and 5, the operation process between the components of the gateway 1 server while the client 10 updates one page in the integrated SNS application will be described.

First, the client 10 requests a page to the broker server 101 through the MQTT protocol using the integrated SNS application (S501).

The broker server 101 matches the page requested by the client 10 with the SNS server 5 corresponding to the page, requests the account manager 103 to authenticate the client 10, and the page of the client 10. Send a request. (S502)

Thereafter, the account manager 103 checks the ID of the client 10 for the client 10 authentication (S503), and if the ID of the client 10 is not authenticated again, the client 10 through the broker server 101 again. Send a reject message according to the authentication failure.

If the client 10 ID is authenticated, a request for the page is sent to the data manager 104. The data manager 104 checks whether there is content for the client 10 request page in the cache server 106 (S505).

If the corresponding content exists in the cache server 106, the cache server 106 transmits the content to the data manager 104 (S506), and the data manager transmits the content to the broker server 101 (S510). The broker server 101 responds to the client 10 according to the page request (S511).

If there is no corresponding content in the cache server 106, the cache server 106 requests the page to the SNS server through the web service adapter 107. (S507) The web service adapter 107 corresponds to the SNS corresponding to the page request. The page is requested by the protocol of the server 5 and a response to the request is received (S508).

The web service adapter 107 stores the content corresponding to the response in the cache server 106 and transmits the content to the data manager 104 (S509).

The data manager 104 transmits the content to the broker server 101 (S510), and the broker server 101 transmits a content response according to the page request to the client 10 (S511).

If the client 10 caches content that is frequently requested, since the content is provided to the client 10 in the gateway 1 server without reaching the actual SNS server 5, traffic and response time can be reduced.

6 is a sequential diagram of a synchronization method using SyncML according to an embodiment of the present invention.

Referring to FIG. 6, a synchronization method using the SyncML protocol, which is a synchronization standard protocol of the Funambol synchronization engine, will be described.

First, when there is an updated content, the SNS server 5 transmits a push message and data of the updated content to the protocol of the SNS server 5.

Then, the web server adapter receives the updated data to the adapter of the SNS server (5).

While the web service adapter 107 receives the updated data, the synchronization engine checks whether there is changed data among the received data, and transmits only the changed data to the synchronization server 105.

At this time, the synchronization engine repeats the above process while the SNS server 5 transmits data.

After that, the synchronization server 105 updates the received data and finishes synchronization.

When the data is updated in the above manner, the synchronization server 105 may improve the response speed and traffic performance by transmitting only the changed portion to match the data of the SNS server 5.

The following describes the integrated SNS protocol design.

One embodiment of the present invention designs an integrated SNS protocol based on MQTT. However, it is not limited thereto.

First, a brief description of the MQTT, MQTT basically consists of one broker server 101, two Publish clients, and Subscribe clients.

In the following description, the SNS server 5 will be represented as a publsh client 801 and the client 10 as a Subscribe client 802. However, the SNS server 5 may be a subscribe client, and the client 10 may be a publsh client.

The broker server 101 acts as a relay for message delivery for a topic given between two publish and subscribe clients. When the Publish client publishes a topic and forwards the message to the broker server 101, the Subscribe client subscribes to the topic of interest.

In order to operate as above, MQTT-based protocol design must define three things as follows. The first is the Topic Tree of the message to be delivered, the second is the QoS level, and the third is the length of the message.

7 illustrates a configuration of a topic tree according to an embodiment of the present invention.

First, referring to FIG. 7, a method of setting a topic tree configuration will be described.

MQTT uses Topic for push service between Publish / Subscribe client and Broker server. Topic tree is used to manage the topic by further subdividing each topic.

At this time, the SNS used by each user is different, and the functions of the SNS are different. Therefore, Topic must be managed separately by SNS and function for each user ID.

Setting the definition of the topic tree to the example of FIG. 7 to determine the push notification message for each SNS and function, the broker server 101 sees the topic of the Publish client and sends messages only to the Subscribe clients that have requested a subscription. Will be sent.

8 illustrates a packet exchange method according to a quality of service (Qos) level

Qos refers to the quality of service related to transmission rate and error rate on the Internet or network.

MQTT supports three levels of QoS to guarantee the reliability of messaging. Referring to FIG. 8, qos 0 700 delivers a message only once and does not check whether it is delivered. Therefore, in the case of a message having a large payload, if a packet loss occurs, the message is likely to be lost without being delivered. qos 1 701 delivers the message at least once and checks whether it is delivered. However, if the PUBACK packet is lost, there is a possibility that the message is redundantly delivered. qos 2 702 delivers exactly once through a 4-way handshake. If you use qos 2 (702), there is no possibility of losing the message, but the end-to-end delay is increased by the 4-way handshake process. The higher the QoS level, the greater the end-to-end delay as packets are exchanged more often.

The retransmission time is the transport protocol. It is a good idea to use a high QoS level to ensure that the message is delivered from the Publish client to the Subscribe client. In this case, however, the end-to-end delay increases. If the results of packet loss and end-to-end delay on payload size can be analyzed to derive the appropriate QoS level according to payload size, it will be able to construct a more effective push notification service network environment using MQTT. .

Therefore, in the following, first, the experimental environment and measuring method for determining the QoS level and message length will be described, and the second will be presented to design the integrated SNS protocol by presenting the experimental result and the decision derived based on this.

9 illustrates a message delivery process of an MQTT according to an embodiment of the present invention.

10 shows an actual network experiment configuration for the design of the integrated SNS protocol according to an embodiment of the present invention.

9 and 10, in a network environment and packet measurement method for performance analysis of end-to-end delay and packet loss according to QoS level and payload size of MQTT between a terminal and a gateway (1) server in an actual network environment. Explain.

The server OS for the experiment is CentOS 6.3 Final in Linux, and the broker server 101 software can use Mosquitto, an open source project.

  MQTT delivers messages through a broker server 101 between a Publish client and a Subscribe client. 9 shows a process in which each client delivers a message to a corresponding topic through the broker server 101.

The publish client informs the broker server 101 of the topic to publish. The broker server 101 plays a role of relaying messages between clients based on the corresponding topic when the publishing topic of the publishing client and the subscribed subscriber are the same topic. The Subscribe client receives the message only for the Topic that made the Subscribe request to the broker server 101.

For example, if a Publish client delivers a Topic named A to the broker server 101, and a number of Subscribe Clients request to subscribe to a Topic named A, only the Subscribe client that requested to subscribe to A Topic, You will receive a message.

  In the embodiment of the present invention, a communication environment between the client 10 and the gateway 1 may be implemented as shown in FIG. 10 for an experiment in an environment similar to an actual network.

Referring to FIG. 10, it can be seen that the portable terminal communicates with the broker server 101 via a 3G network, which is the same as an experiment in an actual wireless network environment. The experiment was conducted in JAVA language based client 10 using IA92 library in Android 2.3 environment. The maximum transmission unit (MTU) of the test target device is set to 1,500.

In the embodiment of the present invention, a Shark application is used to collect packets. In mobile environment, it is limited environment for capturing packets. Therefore, packet capture is done through Shark application and packet analysis is performed with Wireshark. Packets between the server and client 10 are collected for 5 minutes of measurement time to analyze end-to-end delay and packet loss. End-to-end delay measurements are measured using timestamps from the Publish client to the Subscribe client past the gateway (1) server. The packet loss measuring method counts and measures retransmission request packets of packets measured for 5 minutes.

FIG. 11 is a diagram illustrating an analysis result of an average end-to-end delay of the experiment of FIG. 10, and FIG. 12 is a diagram illustrating an analysis result of packet loss of the experiment of FIG. 10.

11 and 12, based on the above experiment according to an embodiment of the present invention to analyze the end-to-end delay and packet loss for the packet, the end-to-end delay and packet loss according to the QoS level and payload Present the results for. In addition, based on the results, we present the settings for use as the integrated SNS protocol.

  11 below is a graph comparing end-to-end delay results for QoS levels and payloads between the gateway 1 server and the terminal. Overall, as the QoS level increases, the average end-to-end delay increases. This is because of the difference in the number of transmission / reception of packets according to QoS. On average, there is a large end-to-end delay, which is caused by the transmission speed of wireless network 3G networks.

The payload size grows significantly from 4,000. In the case of qos 0 (700), it decreased rather from 4,000 to 0.65 to 0.61, while qos 1 (701) was maintained at 0.57 and QoS was 0.47, which is the same value as the payload length is 1,000. However, starting at 4,000 payloads, the propagation delay increased by at least 0.15 at all QoS levels.

One more noteworthy point is that the propagation delay is not high for each QoS. In conclusion, the QoS level does not need to be considered in terms of propagation delay, and the payload size should be less than 4,000.

12 is a result of analyzing the packet loss rate between the gateway (1) server and the terminal.

As a result of the experiment, it can be seen that the packet loss of qos 2 702 is lower than that of qos 0 700 and qos 1 701. Overall, packet loss rate is stable, but the packet loss rate of qos 2 702 is relatively low compared to qos 0 (700) or qos 1 (701) because the loss rate is reduced by using a 4-way handshake to deliver messages. .

Communication between the gateway 1 and the integrated SNS application must be delivered very stably. In particular, to take advantage of the synchronization function, a stable protocol is essential. Therefore, qos 2 702 with low packet loss is suitable.

In the embodiment of the present invention, in order to cope with the explosion of SNS traffic, a communication performance improvement method using the gateway 1 is proposed. It was possible to confirm the upper design result of the gateway 1 to the higher design result of the gateway 1 to realize the proposed scheme, and also to design the MQTT-based SNS integrated protocol for communication between the gateway 1 server and the terminal. I could confirm it. In particular, while the gateway 1 of the embodiment plays a role of caching and synchronization, it is possible to improve communication performance in comparison with the existing. In addition, the SNS integration protocol can be operated based on the MQTT, and it is possible to obtain a reliable result with respect to the performance of the MQTT.

Claims (3)

A broker server 101 that communicates with at least one networked client through an integrated SNS protocol and relays message transfer between a plurality of SNS servers;
An account manager 103 which receives the client's message and ID information from the broker server 101 and manages the client's account;
A data manager 104 for receiving ID approval and message request from the account manager 103 and managing data of the cache server 106 and the synchronization server 105;
A synchronization server 105 in charge of a synchronization function according to the command of the data manager 104;
A cache server 106 responsible for the caching function according to the command of the data manager 104,
And a web service adapter (107) for receiving commands from the synchronization server (105) and the cache server (106) and communicating with each SNS server according to a separate protocol.
The method of claim 1,
The synchronization server 105, the SNS gateway, characterized in that for setting each of the synchronization items individually for each SNS server connected via the web service adapter (107).
The method of claim 1,
When there is a request for a page from the client, the cache server 106 selectively requests the content for the page to the SNS server relayed by the broker server 101. .

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