JP2021009601A - Connection control device, connection control method and connection control program - Google Patents

Abstract

To provide a connection control device that can complete connection with a terminal that is a communication partner of P2P communication and speed up the connection without collecting connection candidates and trying to connect them.SOLUTION: A connection control device 100 includes: a communication unit 101 that receives a P2P communication request from a terminal, transmits the P2P communication request to another terminal, and transmits a communication request response from another terminal to the terminal that has transmitted the P2P communication request; a storage unit 103 that stores a combination of terminals that have succeeded in the P2P communication; and a processing unit 102 that refers to the storage unit 103 for a terminal that requests P2P communication and the combination of the terminals that have succeeded in P2P communication. The communication unit 101 transmits to the terminal that has transmitted the P2P communication request, the terminal that requests P2P communication and the combination of the terminals that have succeeded in the P2P communication.SELECTED DRAWING: Figure 1

Description

The present invention relates to a connection control device, a connection control method and a connection control program, for example, a connection control device used for WebRTC, a connection control method and a connection control program.

In recent years, the WebRTC (Web Real-Time Communication) standard, which has been standardized, provides a rich set of real-time media functions on native applications including browser applications and WebRTC libraries (Non-Patent Document 1).

For example, by using WebRTC and HTML5 (HyperText Markup Language 5), a device can establish a media flow directly with another device. This enables real-time interactive television, audio, textual media, and / or data exchange, and its use is expanding.

In this WebRTC media communication, there is a demand for devices, methods, and programs that realize high-speed media communication connections between terminals. When performing media communication with WebRTC, the packet transmission destinations of both devices are determined by a protocol (see Non-Patent Document 3) called ICE (Interactive Connectivity Establishment) defined in RFC5245 (see Non-Patent Document 2). In the ICE protocol, since each device collects IP address candidates and then tries to connect to each device, there is a problem that it takes time to complete the connection.

To solve this problem, the IETF (The Internet Engineering Task Force) working group is developing a method called Trickle ICE, which collects candidates in the device and attempts to connect at high speed. Attempts are being made.

In media communication with WebRTC, when communicating between terminals, connection trials are performed after or while collecting IP address candidates at each terminal according to the Vanilla ICE (RFC5245) protocol and the Trickle ICE protocol. For example, Patent Documents 1 to 4 describe communication methods using WebRTC and ICE protocols.

Japanese Unexamined Patent Publication No. 2016-143076 Japanese Unexamined Patent Publication No. 2016-143911 Japanese Unexamined Patent Publication No. 2016-144216 Japanese Unexamined Patent Publication No. 2016-144217

WebRTC, [online], [Search on March 29, 2016], Internet <URL: http: // www. webrtc. org /> RFC5245 Interactive Establishment (ICE): A Protocol for Network Addless Translator (NAT) Travelsal forOffer / Internet IETF. org / html / rfc5245> Internet-Draft Trickle ICE: Initial Provisioning of Candidates for the Interactive Establishment (ICE) Protocol, [online], [online], [september 11, 2018] IETF. org / html / draft-ietf-ice-tricle>

In this way, since connection candidates are collected and connection attempts are performed each time a connection is made, there is a problem that it takes time to complete the connection.

The connection control device of one embodiment receives a P2P communication request from a storage unit that stores a combination of terminals that have succeeded in P2P (Peer to Peer) communication, and transmits the P2P communication request to another terminal. Refer to the storage unit for a combination of a communication unit that receives a communication request response from the other terminal and transmits the communication request response to the terminal, and a terminal that has succeeded in P2P communication with the terminal requesting P2P communication. The communication unit includes a processing unit for extracting, and the communication unit transmits a combination of terminals that have succeeded in P2P communication to the terminal that requests P2P communication to the terminal that requested P2P communication.

The connection control method of one embodiment is a connection control method in a connection control device that controls P2P (Peer to Peer) communication, stores a combination of terminals that have succeeded in P2P communication, and receives a P2P communication request from the terminal. , The P2P communication request is transmitted to another terminal, the communication request response is received from the other terminal, the communication request response is transmitted to the terminal, and the combination of terminals that have succeeded in the stored P2P communication is referred to. Therefore, the combination of terminals for the terminal that transmitted the P2P communication request was extracted and transmitted to the terminal that transmitted the P2P communication request.

The program of one embodiment is a program that causes a computer to function as a connection control device that controls P2P (Peer to Peer) communication, and executes the above connection control method.

According to the connection control device, connection control method, and connection control program of the present invention, it is possible to complete the connection with the terminal that is the communication partner of P2P communication without collecting connection candidates and attempting connection, and to speed up the connection. it can.

It is a block diagram which shows the schematic structure of the connection control device which concerns on Embodiment 1. FIG. It is a figure which shows the schematic structure of the communication system which concerns on Embodiment 2. It is a sequence diagram which shows an example of the connection procedure of the communication system which concerns on Embodiment 2. FIG. It is a figure which shows an example of the information of the combination of terminals which is stored in the storage unit 103 of a connection control device 100. It is a sequence diagram which shows an example of the connection procedure of the communication system which concerns on Embodiment 2. FIG. It is a sequence diagram which shows an example of the connection procedure of the communication system which concerns on Embodiment 3. It is a sequence diagram which shows an example of the connection procedure of the communication system which concerns on Embodiment 3.

Embodiment 1
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, P2P (Peer to Peer) communication by WebRTC will be described as an example, but it can also be applied to P2P communication using a technology other than WebRTC.

FIG. 1 is a block diagram showing a schematic configuration of the connection control device according to the first embodiment. In FIG. 1, the connection control device 100 includes a communication unit 101, a processing unit 102, and a storage unit 103.

The communication unit 101 communicates with the terminal via the network. Then, the communication unit 101 receives the P2P communication request from the terminal. Further, the communication unit 101 transmits a P2P communication request to another terminal, and receives a communication request response from the other terminal. Then, the communication unit 101 transmits a communication request response to the terminal that has transmitted the P2P communication request. Further, the communication unit 101 transmits a combination of terminals that have succeeded in P2P communication to the terminal that has transmitted the P2P communication request in accordance with the instruction of the processing unit 102 described later. For example, the communication unit 101 may include a LANI / F (InterFace) module that connects to a network via a LAN (Local Area Network) cable.

The processing unit 102 processes the P2P communication request from the terminal. The processing unit 102 refers to the storage unit 103 for a combination of a terminal that requests P2P communication and a terminal that has succeeded in P2P communication. Then, the processing unit 102 instructs the communication unit 101 to transmit the combination of the terminal that requests P2P communication and the terminal that succeeds in P2P communication to the terminal that has transmitted the P2P communication request.

For example, the processing unit 102 transfers the signaling message of the P2P communication request received from the terminal to the other terminal. The processing unit 102 also has a function of analyzing and rewriting the contents of the signaling messages transmitted and received at the time of transfer. Further, the processing unit 102 has a function of acquiring and analyzing data of a combination of successful terminals when the device is successfully connected.

The storage unit 103 stores a combination of terminals that have succeeded in P2P communication. The storage unit 103 is preferably composed of a memory circuit. Then, the storage unit 103 outputs to the processing unit 102 a combination of a terminal that requests P2P communication and a terminal that has succeeded in P2P communication, in response to the reference of the processing unit 102.

As described above, according to the connection control device of the first embodiment, by storing the combination of the terminal requesting P2P communication and the terminal succeeding in P2P communication, when the connection request is made again, the connection candidate is collected again. Since the connection can be completed with the terminal that is the communication partner of the P2P communication without performing the connection trial, the connection speed can be increased.

When the communication unit 101 receives the P2P communication request from the terminal, the processing unit 102 may refer the combination of the terminal requesting the P2P communication and the terminal that succeeded in the P2P communication to the storage unit 103. Good.

Further, the processing unit 102 may refer to the storage unit 103 for a combination of a terminal that requests P2P communication and a terminal that has succeeded in P2P communication when the terminals try to connect to each other.

Embodiment 2
In the second embodiment, the communication system using the connection control device 100 of the first embodiment will be described. FIG. 2 is a diagram showing a schematic configuration of a communication system according to a second embodiment. In FIG. 2, the communication system 200 includes a connection control device 100, terminals 201-11 to 201-n (n is an arbitrary natural number), and a network 202.

The connection control device 100 is the connection control device described in the first embodiment. The connection control device 100 communicates with the terminals 201-1 to 201-n via the network 202. Specifically, the connection control device 100 processes a P2P connection request from any of the terminals 201-1 to 201-n. Then, the connection control device 100 sequentially tries the connection request to the terminals 201-1 to 201-n. Then, the connection control device 100 transmits the information of the connectable terminal to the terminal requesting the P2P connection. For example, the connection control device 100 may be a server having a connection candidate management array as a database in the signaling server function.

Further, when the connection request is made again, the connection control device 100 transmits a combination of a terminal requesting P2P communication and a terminal succeeding in P2P communication to the terminal requesting P2P connection.

The terminals 201-1 to 201-n are terminals capable of P2P communication with each other. Any of the terminals 201-1 to 201-n transmits a P2P connection request to the connection control device 100. Further, any of the terminals 201-1 to 201-n transmits a P2P connection request response, which is a response to the P2P connection request transmitted from the connection control device 100, to the connection control device 100. Then, any of the terminals 201-1 to 201-n receives the P2P connection request response transmitted from the connection control device 100 and starts the P2P connection. Further, the terminals 201-1 to 201-n exchange route information in addition to the communication request / communication request response exchange in the communication with the connection control device 100.
The detailed procedure of P2P connection will be described later.

Further, for example, the terminals 201-1 to 201-n may include a browser or a native application corresponding to WebRTC communication. Further, the communication between the terminals 201-1 to 201-n may be any or a combination of audio, video, and arbitrary data.

With the above configuration, P2P communication is performed between the terminals 201-1 to 201-n. Next, the connection procedure will be described. FIG. 3 is a sequence diagram showing an example of the connection procedure of the communication system according to the second embodiment. FIG. 3 shows an example in which terminals 211-1 and terminals 201-2 corresponding to RFC5425 first perform WebRTC communication.

First, in step S301, the process of collecting P2P communication candidates is started, and the process proceeds to step S302.

In step S302, a P2P connection request is transmitted from the terminal 201-1 to the connection control device 100.

In step S303, when a communication request from the terminal 201-1 to the terminal 201-2 is received, the processing unit 102 of the connection control device 100 refers to the storage unit 103 for the communication unit 101, and the combination of terminals is registered. Check if it is. If there is no registration, no additional processing is performed.

In step S304, terminal 201-2 receives the connection request and proceeds to step S305.

In step S305, the terminal 201-2 performs a process related to collecting candidates for P2P communication, and proceeds to step S306.

In step S306, terminal 201-2 transmits a connection request response to the connection control device 100.

In step S307, when the communication request response from the terminal 201-2 to the terminal 201-1 is received, the processing unit 102 of the connection control device 100 refers to the storage unit 103. Then, the processing unit 102 confirms whether the combination of the terminal 201-1 and the terminal 201-2 is registered. If there is no registration, no additional processing is performed.

In step S308, the connection request response is transmitted from the connection control device 100 to the terminal 211-1, and the process proceeds to step S309.

In step S309, a P2P connection between terminal 201-1 and terminal 201-2 is attempted. In this P2P connection trial, the terminal 211-1 and the terminal 201-2 communicate with the connection control device 100 in order to acquire information necessary for the P2P connection such as route information.

In step S310, when the connection between the terminals is successful as a result of the connection attempt by the normal ICE protocol, the information of the successful connection candidate is transmitted from the terminals 211-1 and the terminal 201-2 to the connection control device 100. .. The processing unit 102 of the connection control device 100 registers the received terminal combination information in the storage unit 103.

By the above operation, the connection control device 100 can store the combination of terminals for which the P2P connection is successful. Next, an example of information on the combination of terminals stored in the storage unit 103 will be described. FIG. 4 is a diagram showing an example of information on the combination of terminals stored in the storage unit 103 of the connection control device 100. In FIG. 4, List 351 and List 352 are lists showing information on communication combination candidates. In Listing 351 and Listing 352, the underlined information is the combination of terminals 211-1 and 201-2 that actually made a P2P connection. The combination information of the terminal 211-1 and the terminal 201-2 is, for example, at least one of the terminal IP address, port number, protocol, component, type, priority, foundation, and base included in the ICE Candidate defined in RFC5245. Includes one.

Therefore, the storage unit 103 stores the underlined information of list 351 and list 352 in the columns of candidate A and candidate B in the line of the combination of terminals 211-1 and 201-2 in list 353. Information on the combination of the terminal A and the terminal B (that is, any terminal 201-1 to the terminal 201-n) to which the P2P connection is made in this way is registered in the storage unit 103.

Next, the procedure for reconnecting will be described. FIG. 5 is a sequence diagram showing an example of the connection procedure of the communication system according to the second embodiment. FIG. 5 shows an example in which terminals 211-1 and terminals 201-2 corresponding to RFC5425 are reconnected and perform WebRTC communication.

First, similarly to FIG. 3, in step S301, the process of collecting P2P communication candidates is started, and the process proceeds to step S302.

Similar to FIG. 3, in step S302, a P2P connection request is transmitted from the terminal 211-1 to the connection control device 100.

In step S403, when the communication request from the terminal 2011-1 is received, the processing unit 102 of the connection control device 100 refers to the storage unit 103 by the communication unit 101, and the combination of terminals that succeeded in P2P communication is registered. Check if it is. When there is registration, the candidate information included in the communication request is changed, and the combination of successful terminals registered in the storage unit 103 is given the highest priority. Then, the processing unit 102 extracts the combination of terminals that have succeeded in P2P communication from the storage unit 103.

In step S404, the processing unit 102 transmits a connection request to the terminal 102 via the communication unit 101, the terminal 201-2 receives the connection request, and the process proceeds to step S405.

In step S405, the terminal 201-2 performs a process related to collecting candidates for P2P communication, and proceeds to step S406.

In step S406, terminal 201-2 transmits a connection request response to the connection control device 100.

In step S407, when the communication request response from the terminal 201-2 to the terminal 201-1 is received, the processing unit 102 of the connection control device 100 refers to the storage unit 103. Then, the processing unit 102 confirms whether the combination of the terminal 201-1 and the terminal 201-2 is registered. When registered, the candidate information included in the communication request response is changed, and the combination of successful terminals registered in the storage unit 103 is given the highest priority. Then, the processing unit 102 extracts the combination of terminals that have succeeded in P2P communication from the storage unit 103.

In step S408, the connection request response is transmitted from the connection control device 100 to the terminal 211-1, and the process proceeds to step S409.

In step S409, a P2P connection between terminal 201-1 and terminal 201-2 is attempted. Terminals 211-1 and 201-2 each try to connect to the candidate who succeeded in the previous connection with the highest priority. In this P2P connection trial, the terminals 211-1 and the terminal 201-2 communicate with the connection control device 100 in order to acquire information necessary for the P2P connection such as route information as information on the combination of terminals that have succeeded in the P2P communication. I do.

In step S410, when the connection between the terminals is successful as a result of the connection attempt by the normal ICE protocol, the information of the successful connection candidate is transmitted from the terminals 211-1 and the terminal 201-2 to the connection control device 100. .. The processing unit 102 of the connection control device 100 registers the received terminal combination information in the storage unit 103. When the combination of terminals is the same, the information of the combination of terminals is overwritten and registered in the storage unit 103.

As described above, according to the connection control device and the communication system of the second embodiment, the combination of the terminal requesting P2P communication and the terminal succeeding in P2P communication is stored, and the communication unit 101 receives the P2P communication request from the terminal. In this case, by transmitting a combination of terminals that have succeeded in P2P communication, when a connection request is made again, the connection with the terminal that is the communication partner of P2P communication is completed without collecting connection candidates and trying to connect again. Since it can be done, the connection speed can be increased.

In particular, the embodiment of the present invention is useful when a large number of devices use a signaling server and their network environments are different.

It should be noted that each configuration inside the connection control device 100 according to the embodiment of the present invention may be different hardware.

Further, each of the terminal 211-1 and the terminal 201-2 may have a connection candidate changing process that the processing unit 102 and the storage unit 103 have. In that case, it is possible to read the combination of connected terminals before collecting the candidates for the route information and omit the candidate collection process.

Embodiment 3
In the third embodiment, the operation when the Trickle ICE is supported will be described. FIG. 6 is a sequence diagram showing an example of the connection procedure of the communication system according to the third embodiment.
FIG. 3 shows an example in which terminals 211-1 and terminals 201-2 compatible with Trickle ICE first perform WebRTC communication.

First, in step S501, a P2P connection request is transmitted from the terminal 211-1 to the connection control device 100.

In step S502, terminal 201-2 receives the connection request from the connection control device 100.

On the other hand, in step S503, the terminal 2011-1 starts a process of collecting candidates for P2P communication.

In step S504, the connection request response is transmitted from the terminal 201-2 to the connection control device 100.

In step S505, the connection request response is transmitted from the connection control device 100 to the terminal 211-1.

On the other hand, in step S506, the terminal 201-2 performs a process related to collecting candidates for P2P communication.

In step S507, a P2P connection between terminal 201-1 and terminal 201-2 is attempted. In this P2P connection trial, when the first connection candidates are received from the terminals 211-1 and 201-2, respectively, the communication unit 101 refers to the storage unit 103 and confirms whether the combination of terminals is registered. If there is no registration, no additional processing is performed. Further, the terminal 211-1 and the terminal 201-2 communicate with the connection control device 100 in order to acquire information necessary for P2P connection such as route information.

In step S508, when the connection between the devices is successful as a result of the connection attempt by the normal Trickle ICE protocol, the information of the successful connection candidate is transmitted from the terminals 211-1 and the terminal 201-2 to the connection control device 100. .. The processing unit 102 registers the received terminal combination information in the storage unit 103.

By the above operation, the connection control device 100 can store the combination of terminals for which the P2P connection is successful.

Next, the procedure for reconnecting will be described. FIG. 7 is a sequence diagram showing an example of the connection procedure of the communication system according to the fourth embodiment. FIG. 7 shows an example in which terminals 211-1 and terminals 201-2 compatible with Trickle ICE are reconnected to perform WebRTC communication.

First, in step S501 as in FIG. 6, a P2P connection request is transmitted from the terminal 211-1 to the connection control device 100.

Similarly to FIG. 6, in step S502, the terminal 201-2 receives the connection request from the connection control device 100.

On the other hand, in step S503, the terminal 2011-1 starts a process of collecting candidates for P2P communication.

Similar to FIG. 6, in step S504, the connection request response is transmitted from the terminal 201-2 to the connection control device 100.

Similar to FIG. 6, in step S505, the connection request response is transmitted from the connection control device 100 to the terminal 211-1.

On the other hand, in step S506, the terminal 201-2 performs a process related to collecting candidates for P2P communication.

In step S607, a P2P connection between terminal 201-1 and terminal 201-2 is attempted. In this P2P connection trial, when the first connection candidates are received from the terminals 211-1 and 201-2, respectively, the communication unit 101 refers to the storage unit 103 and confirms whether the combination of terminals is registered. When registered, the combination of terminals that have succeeded in P2P communication registered in the storage unit 103 is extracted, and the combination of terminals that have succeeded in P2P communication is transmitted to the other terminal before the received candidate. Further, the terminal 211-1 and the terminal 201-2 communicate with the connection control device 100 in order to acquire information necessary for P2P connection such as route information.

In step S608, when the connection between the devices is successful as a result of the connection attempt by the normal Trickle ICE protocol, the information of the successful connection candidate is transmitted from the terminals 211-1 and the terminal 201-2 to the connection control device 100. .. The processing unit 102 registers the received terminal combination information in the storage unit 103. When the combination of terminals is the same, the information of the combination of terminals is overwritten and registered in the storage unit 103.

As described above, according to the connection control device and the communication system of the second embodiment, the combination of the terminal requesting P2P communication and the terminal that succeeded in P2P communication is stored, and when the terminals attempt to connect to each other, P2P communication is successful. By transmitting the combination of terminals to the terminal from the connection control device, when a connection request is made again, the connection with the terminal to be the communication partner of P2P communication can be completed without collecting connection candidates and trying to connect again. Therefore, the speed of connection can be increased.

The present invention is not limited to the above embodiment, and can be appropriately modified without departing from the spirit. For example, apply when you need to collect global addresses using the STUN (Session Traversal Utilities for NATs (Network Address Translation)) server of the device, or when you need to relay using the TURN (Traversal Using Relay around NAT) server. May be.

Further, in the above description, each element described in the drawing as a functional block and a flow for performing various processes can be configured by a CPU, a memory, and other circuits in terms of hardware, and in terms of software. , Realized by programs loaded in memory. Therefore, it is understood by those skilled in the art that these functional blocks can be realized in various ways by hardware only, software only, or a combination thereof, and is not limited to any of them.

Also, the programs described above can be stored and supplied to a computer using various types of non-transitory computer-readable media. Non-transitory computer-readable media include various types of tangible recording media. Examples of non-temporary computer-readable media include magnetic recording media (eg flexible disks, magnetic tapes, hard disk drives), optomagnetic recording media (eg optomagnetic disks), CD-ROMs (Read Only Memory), CD-Rs, It includes a CD-R / W, a semiconductor memory (for example, a mask ROM, a PROM (Programmable ROM), an EPROM (Erasable PROM), a flash ROM, and a RAM (Random Access Memory)). The program may also be supplied to the computer by various types of temporary computer-readable media. Examples of temporary computer-readable media include electrical, optical, and electromagnetic waves. The temporary computer-readable medium can supply the program to the computer via a wired communication path such as an electric wire and an optical fiber, or a wireless communication path.

100 Connection control device 101 Communication unit 102 Processing unit 103 Storage unit 200 Communication system 201-1 to 201-n Terminal 202 Network

Claims (11)

A storage unit that stores a combination of terminals that have succeeded in P2P (Peer to Peer) communication,
A communication unit that receives a P2P communication request from a terminal, transmits the P2P communication request to another terminal, receives a communication request response from the other terminal, and transmits the communication request response to the terminal.
A processing unit that extracts a combination of terminals that have succeeded in P2P communication with respect to a terminal that requests P2P communication by referring to the storage unit is provided.
The communication unit
A combination of terminals that have succeeded in P2P communication with respect to a terminal that requires P2P communication.
Send to the terminal that requested P2P communication,
Connection control device. The processing unit
When the communication unit receives a P2P communication request from the terminal,
A combination of terminals that have succeeded in P2P communication with respect to a terminal that requests P2P communication is extracted with reference to the storage unit.
The communication unit
A combination of terminals that have succeeded in P2P communication with respect to a terminal that requires P2P communication.
Send to the terminal that requested P2P communication,
The connection control device according to claim 1. The processing unit
When terminals try to connect to each other
A combination of terminals that have succeeded in P2P communication with respect to a terminal that requires P2P communication.
Extract by referring to the storage unit
The communication unit
A combination of terminals that have succeeded in P2P communication with respect to a terminal that requires P2P communication.
Send to the terminal that requested P2P communication,
The connection control device according to claim 1. The combination of the terminals
Includes at least one of the terminal IP address, port number, protocol, component, type, priority, foundation, base included in the ICE Candidate specified in RFC5245.
The connection control device according to any one of claims 1 to 3. The P2P communication is
Established by WebRTC (Web Real-Time Communication) communication means,
The connection control device according to any one of claims 1 to 4. It is a connection control method in a connection control device that controls P2P (Peer to Peer) communication, and stores the combination of terminals that have succeeded in P2P communication.
A P2P communication request is received from a terminal, and the P2P communication request is transmitted to another terminal.
A communication request response is received from the other terminal, and the communication request response is transmitted to the terminal.
With reference to the memorized combination of terminals that succeeded in P2P communication,
Extracting the combination of terminals for the terminal that transmitted the P2P communication request,
The P2P communication request is transmitted to the terminal that has transmitted the request.
Connection control method. When a P2P communication request is received from the terminal,
Extract the combination of terminals that have succeeded in P2P communication with respect to the terminal that requests P2P communication.
Send to the terminal that requested P2P communication,
The connection control method according to claim 6. When terminals try to connect to each other
Extract the combination of terminals that have succeeded in P2P communication with respect to the terminal that requests P2P communication.
The connection control method according to claim 6, wherein P2P communication is transmitted to the requesting terminal. The combination of the terminals
Includes at least one of the terminal IP address, port number, protocol, component, type, priority, foundation, base included in the ICE Candidate specified in RFC5245.
The connection control method according to any one of claims 6 to 8. The P2P communication is
Established by WebRTC (Web Real-Time Communication) communication means,
The connection control method according to any one of claims 6 to 9. A program that causes a computer to function as a connection control device that controls P2P (Peer to Peer) communication, and executes the connection control method according to any one of claims 6 to 10.

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