KR101782750B1 - Subscriber planning and Session Initiation Protocol processing integration operation Method for implementing Voice over Internet Protocol system of Ad-Hoc network - Google Patents

Abstract

The present invention relates to an ad-hoc network technique. More specifically, the present invention relates to a subscriber plan and an integrated session initiation protocol (SIP) processing managing method for implementing voice over internet protocol (VoIP) system of ad-hoc network. According to the present invention, network performance degradation problem by SIP registration message load in the ad-hoc network can be solved by establishing a function of a proxy mode for supporting a VoIP service between backbone network and the ad-hoc network by applying a proxy concept. A method comprises: a step (a) of a first terminal in the backbone network requesting the VoIP service support in the ad-hoc network to a network plan node; a step (b) of the network plan node performing a network plan for bring reception subscriber information in the ad-hoc network by interconnecting with an exchanger; a step (c) of registering mapping reception subscriber information mapped with ad-hoc network operation information to a database by using a SIP registration algorithm in the proxy node connected with the ad-hoc network and the backbone network; and a step (d) of connecting a voice call between the first terminal and a second terminal of the ad-hoc network.

Description

Technical Field [0001] The present invention relates to a subscriber planning and SIP processing integrated operation method for establishing a VoIP system of an ad hoc network,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates generally to an ad hoc network technology, and more particularly, to a subscriber planning and a SIP (Session Initiation Protocol) integrated operation method for establishing a Voice over Internet Protocol (VoIP) system of an ad hoc network.

With the development of mobile communication and / or terminal technology, the utilization of the ad hoc network having the feature of freely configuring the network without the base station is increasing. Especially, it is applied to various fields such as military battle network, disaster recovery network, and the like, since ad hoc network is applied to various fields such as mobility and / or scalability and network construction cost and / or time is lower than wired network, An ad hoc network system for backbone network and wireless ad-hoc network subscriber calls is emerging.

SIP (Session Initiation Protocol) standard should be applied to build an ad hoc network to support VoIP service. In this case, all the subscribers of the ad-hoc network are required to receive the subscriber information of the backbone network and the respective location information from the network point of view when the VoIP service is desired (the location information means the telephone number and the IP address information from the network point of view, The number of the ad-hoc network is increased, and the registration delay time of the SIP registration process and the registration failure cause the situation that the VoIP service can not be supported.

In order to deal with the problem of VoIP service support due to the difference between the ad hoc network and the backbone network characteristics (transmission speed, delay time, etc.), the role of the node applying the proxy concept is needed. However, since the existing VoIP service support schemes in the ad hoc network mainly focus on the problem of applying the SIP standard to the ad-hoc terminal to effectively perform the ad hoc routing, the performance degradation due to the SIP registration of the ad hoc terminal can not be solved , And heterogeneous networks (backbone network - ad hoc network).

Therefore, in order to support VoIP service, it is necessary to define not only a plan for subscriber planning and operation from the viewpoint of establishing an ad hoc network system but also a function definition of a node introducing a heterogeneous manganese proxy concept.

In particular, the existing scheme for supporting Voice over Internet Protocol (VoIP) service in the ad-hoc network focuses on ad-hoc routing for effective voice transmission by applying SIP standard to the ad-hoc terminal. 1) the degradation of network performance due to load of SIP registration message, and 2) subscriber planning and application integration procedures for backbone and ad hoc VoIP service support are not covered.

1. Method and Apparatus for Improving VoIP Voice Call Quality in Low-Speed Ad-hoc Communication (Korean Patent No. 10-0947087 (2009.05.14))

1. Jo, YC, et al., "Reservation and Backoff Scheme for Multihop Transmission in Tactical Ad Hoc Networks", Journal of the Korean Institute of Military Science and Technology, Vol.15 No.16 (February 2012) pp.16-27

Disclosure of Invention Technical Problem [8] The present invention has been proposed in order to solve the above problems, and it is an object of the present invention to provide a subscriber plan and SIP (Session Initiation Protocol) for implementing an ad hoc network system for supporting Voice over Internet Protocol (VoIP) service between a wired backbone network and a wireless ad- Processing integrated operation method.

It is another object of the present invention to provide a subscriber planning and SIP processing integrated operation method that integrates VoIP subscriber planning, SIP registration, and voice call support functions.

In order to achieve the above-mentioned object, the present invention provides a method for implementing a subscriber plan and SIP (Session Initiation Protocol) processing for implementing an ad-hoc network system for supporting a voice over Internet Protocol (VoIP) service between a wired backbone network and a wireless ad- do.

The processing integrated operation method includes:

(a) requesting a first terminal in a backbone network to support a Voice over Internet Protocol (VoIP) service in an ad hoc network to a network planning node;

(b) performing a network plan for the network planning node to receive subscriber information in an ad hoc network in cooperation with an exchange;

(c) registering, in a proxy node connected to the ad-hoc network and the backbone network, mapping receiving subscriber information mapped to ad hoc network operation information in a database using a Session Initiation Protocol (SIP) registration algorithm; And

(d) connecting a voice call between the first terminal and the second terminal of the ad hoc network.

The step (b) may further include: (b-1) transmitting, by the network planning node, a subscriber information request message for requesting the reception subscriber information to the exchange through a backbone network; (b-2) the exchange retrieving the subscriber information from the database; (b-3) transmitting the subscriber information request response message to the network planning node through the backbone network; And (b-4) storing the mapping reception subscriber information generated by mapping the ad hoc network operation information to the subscriber information in the database by the network planning node.

Also, the ad-hoc network management information may include an IP address and a frequency.

Also, the ad hoc network operation information may be set in the network plan node and the exchange.

The step (c) includes the steps of: (c-1) transmitting, by the network planning node, a subscriber information registration request message for registering the mapping receiving subscriber information to the proxy node through the backbone network; And (c-2) storing the mapping receiving subscriber information in the database by the proxy node.

The step (d) may further include: (d-1) transmitting, by the first terminal, a telephone call request message for voice communication to the second terminal to the exchange; (d-2) the exchange finds mapped receiving subscriber information for the second terminal in the database and transmits an SIP INVITE message to the proxy node; (d-3) the proxy node creating two separate SIP sessions between the first terminal and the second terminal; And (d-4) transmitting, by the first terminal, the voice packet to the second terminal through the proxy node using the two SIP sessions.

In addition, the voice packet may be an RTP (Realtime Transport Protocol) voice packet including the subscriber information of the second terminal.

Also, the receiving subscriber information may be a CSV subscriber information format in which a subscriber name, an ID, a password, and a telephone number are expressed in a CSV (Comma Separated Value) format.

In addition, the mapping receiving subscriber information may include subscriber's telephone number information and IP address information in an ad-hoc network.

 According to the present invention, by establishing the function of the proxy node for supporting the Voice over Internet Protocol (VoIP) service between the backbone network and the ad hoc network by applying the proxy concept, the problem of degradation of the network performance due to load of the Session Initiation Protocol (SIP) Can be solved.

Another effect of the present invention is that the interworking procedure between the network plan node, the exchange and the proxy node defined for supporting the VoIP service between the backbone network and the ad hoc network can be utilized in the construction of the ad hoc network system.

As another effect of the present invention, SIP registration processing and RTP (real-time transport protocol) voice packet processing procedures and two session management structures of the proxy node may include mobility management, heterogeneous network RTP voice packet processing function It can be extended to various angles and become a usable system structure.

Another advantage of the present invention is that it is applied to various environments (military combat network, disaster recovery network, etc.), and utilization can be further increased.

FIG. 1 is a block diagram of a subscriber planning and SIP (Session Initiation Protocol) integrated management system for establishing a Voice over Internet Protocol (VoIP) system of an ad hoc network according to an embodiment of the present invention.
2 is a flowchart illustrating a network planning and propagation procedure for a VoIP subscriber in an ad hoc network according to an embodiment of the present invention.
3 is a flowchart illustrating a procedure for registering a subscriber with an exchange according to an exemplary embodiment of the present invention.
4 is a procedure for voice communication between a backbone network and an ad hoc network according to an embodiment of the present invention.
5 is an example of CSV (Comma Separated Value) subscriber information format according to an embodiment of the present invention.
6 is an example of a format of a subscriber information request and response and subscriber information registration request message according to an embodiment of the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Like reference numerals are used for similar elements in describing each drawing.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. The term "and / or" includes any combination of a plurality of related listed items or any of a plurality of related listed items.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Should not.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A subscriber planning and SIP processing integrated operation method for establishing a VoIP system of an ad hoc network according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram of a subscriber planning and SIP (Session Initiation Protocol) integrated operation and operation system 100 for establishing a Voice over Internet Protocol (VoIP) system of an ad hoc network according to an embodiment of the present invention. 1, the processing integrated operation system 100 includes a network planning node 110, a backbone network 120, an exchange 130, an ad hoc network 140, a proxy node 150, a backbone network terminal 160, And the like.

Herein, the network planning node 110 maintains and / or manages the ad hoc network operation information (IP address, frequency, etc.) in the database and interworks with the exchange 130 and the proxy node 150 when there is a VoIP subscriber service request, Acquires the information, maps the ad hoc network operation information to the proxy node 150, and transfers the information to the proxy node 150.

The backbone network 120 refers to a top-level communication network for connecting various low-speed subnetworks together or for integrating distributed communication devices.

The switching center 130 is connected to the backbone network 120 and maintains subscriber information (subscriber ID, telephone number, etc.) as a server for VoIP service support and interworks with the network planning node 110 and the proxy node 150, Information transfer, subscriber registration / cancellation, and voice call service. Therefore, the exchange 130 is a node that adds a function for implementing an embodiment of the present invention to commercial equipment supporting a SIP (Session Initiation Protocol) protocol stack.

The ad-hoc network 140 is an autonomous network that performs inter-node communication in which wireless communication is possible without using an access point (AP). Since the ad-hoc network 140 configures the topology through the inter-node communication, it can overcome the limitation of the distance of the wireless network communication. Compared with the method using the fixed router (static method) Therefore, the network topology changes dynamically.

The proxy node 150 receives the VoIP subscriber information from the network planning node 110 as a relay node between the backbone network 120 and the ad hoc network 140 and registers the VoIP subscriber information to the exchange 130 on the basis of the SIP standard, And performs a function of relaying SIP (Session Initiation Protocol) call connection and voice transmission in inter-user voice communication.

Referring to FIG. 1, the procedure according to an embodiment of the present invention is roughly divided into three. 3) of registering a subscriber from the proxy node 150 to the switchboard 130 (see FIG. 3), 3) a network planning and propagation procedure for the VoIP subscriber in the ad-hoc network in cooperation with the switchboard 130 A procedure for voice communication between the backbone network 120 and the ad hoc network 140 (see FIG. 4), and the like.

2 is a flowchart illustrating a network planning and propagation procedure for a VoIP subscriber in an ad hoc network according to an embodiment of the present invention. Referring to FIG. 2, when the backbone terminal 160 attempts to connect a call request to a subscriber in the ad hoc network, a VoIP subscriber operation request occurs in the ad hoc network (140 in FIG. 1). When the VoIP subscriber is requested to operate in the ad-hoc network (140 in FIG. 1), the network planning node 110 transmits a subscriber information request message to the switchboard 130 through the backbone network 120 (steps S2110 and S220).

In one embodiment of the present invention, examples of the subscriber information include a subscriber's name and a telephone number. Upon receiving the subscriber information request message, the switch 130 searches the database 210 for VoIP subscriber information (i.e., the subscriber information) in the ad-hoc network 140 (FIG. 1) To the subscriber information request response message (steps S230 and S240).

Upon receipt of the subscriber information request response message, the network planning node 110 searches the database 210 to find ad hoc network operation information (i.e., information necessary for network operation such as IP address and frequency), maps the subscriber information to recipient subscriber information, And generates and stores subscriber information (step S250). It is assumed that ad hoc network operation information is set in the network planning node 110 and the exchange 130 in the embodiment of the present invention.

As the mapping subscriber information, only subscriber's phone number information and IP address information in the ad-hoc network can be considered as a method for supporting VoIP service.

Then, the network planning node 110 transmits a subscriber information registration request message in which an IP address is mapped to a receiving subscriber's telephone number received from the exchange 130, to the proxy node 120 (step S260).

In an exemplary embodiment of the present invention, a CSV (Comma Separated Value) file format is used as an example of a receiving subscriber information file format. A drawing showing this example is shown in Fig. This will be described later.

The database 210 shown in FIG. 2 may be a database configured in the network, or may be a database configured according to a network plan node, an exchange, a proxy node, and the like. An embodiment of the present invention will be described as a database configured in the network for the sake of understanding. Of course, a separate database server can be configured to manage these databases.

3 is a flowchart illustrating a procedure for registering a subscriber with an exchange according to an exemplary embodiment of the present invention. 3, when the subscriber information registration request message is received from the switch 130, the proxy node 150 stores the mapping subscriber information in the database 210 and transmits this information to the SIP (Session Initiation Protocol) RFC 3261 And registers it in the exchange 130 through the registration algorithm (steps S310 and S320). Here, the SIP provides functions for starting, terminating, and controlling the session.

In general, when the SIP standard algorithm is applied to the ad hoc network (140 in FIG. 1), since each subscriber registers, the first to nth ad hoc terminals 340-1 to 340 -n) telephone number, IP address, and the like are written. However, in an embodiment of the present invention, the proxy node 150 performs registration instead of registration in order to prevent performance degradation due to individual registration of subscribers in the ad hoc network.

The proxy gateway (i.e., the proxy node) inserts the telephone number of the subscriber terminals 340-1 to 340-n and its own IP address into the contact field of the SIP register (REGISTER) message, A session between the exchanger and the proxy node, and a session between the proxy node and the ad hoc network subscriber are generated (steps S330, S340, S350, and S360).

4 is a procedure for voice communication between a backbone network and an ad hoc network according to an embodiment of the present invention. In an embodiment of the present invention, the SIP standard detailed procedure is not described in detail, but the INVITE is described as an example, focusing on the function of the proxy node 150. [

Further, there is no description about ad hoc routing for data transfer between the proxy node 150 and the ad-hoc terminals 340-1 to 340-n. 4, if the backbone network terminal 160 attempts to originate a call to the telephone numbers of the first to nth ad-hoc terminals 340-1 to 340-n that desire VoIP communication, The telephone number of the ad-hoc terminals 340-1 to 340-n is inserted into the "To field " of the INVITE message to transmit the telephone call request message to the exchange 130 (step S410).

Upon receiving the telephone call request message, the exchange 130 searches the database 210 for the telephone number in the "To field" to confirm whether or not to register the telephone number, and finds the IP address (IP address of the proxy node) mapped to the telephone number SIP INVITE message to the proxy node 150 (steps S420 and S430).

Upon receiving the SIP INVITE message, the proxy node 150 creates a SIP session with the backbone terminal 160 and searches the database 210 for the telephone number in the "To field " 1 to 340-n) and transmits the message to the ad-hoc terminals 340-1 to 340-n through ad hoc routing (steps S440 and S450).

In the embodiment of the present invention, in consideration of the scalability of the function of the proxy node for supporting the heterogeneous network VoIP service, the proxy node transmits two sessions (a SIP session between the backbone network and the proxy node and a SIP session between the proxy node and the ad- And the like.

 The ad-hoc terminals 340-1 to 340-n create a SIP session with the proxy node 150 upon receiving the SIP INVITE message and ring the terminal (step S460). The SIP call connection procedure between the backbone terminal 160, the exchange 130, the proxy node 150 and the ad-hoc terminals 340-1 to 340-n is performed through the function of the proxy node 150 described in the above procedure After completion, the backbone network terminal 160 generates a RTP (Realtime Transport Protocol) voice packet including an ad-hoc terminal telephone number for voice transmission and transmits the RTP (Realtime Transport Protocol) voice packet to the proxy node 150 To the IP address of the RTP voice packet (step S4710).

Upon receiving the RTP voice packet, the proxy node 150 searches the database with the telephone number in the packet, finds the IP address of the ad-hoc terminal, and transmits the RTP voice packet (steps S480 and S490).

For the sake of clear understanding of the present invention, detailed procedures for INVITE / 100 calling / 180 ringing / 200 OK, which is the SIP call connection procedure described in FIG. 4, will be omitted.

5 is an example of CSV (Comma Separated Value) subscriber information format according to an embodiment of the present invention. Referring to FIG. 5, a CSV (Comma Separated Value) file format is used as an example of a subscriber information file format, and ',' is used for each item identifier.

An example of subscriber information is a subscriber name, an ID, a password, and a telephone number in CSV format. The CSV file format is most commonly used to manage Excel and other data in a relatively simple file format. Of course, this can also be applied to examples of originating subscriber information.

6 is an example of a format of a subscriber information request and response and subscriber information registration request message according to an embodiment of the present invention. Referring to FIG. 6, fields such as a message type, a sequence number, a payload size, and a payload can be configured.

100: Processing integrated operation system
110: network plan node
120: backbone network
130:
140: Adhoc network
150: proxy node
160: Backbone network subscriber
210: Database
340-1 to 340-n: first to n-th ad hoc terminals

Claims (9)

(a) requesting a first terminal in a backbone network to support a Voice over Internet Protocol (VoIP) service in an ad hoc network to a network planning node;
(b) performing a network plan for the network planning node to receive subscriber information in an ad hoc network in cooperation with an exchange;
(c) registering, in a proxy node connected to the ad-hoc network and the backbone network, mapping receiving subscriber information mapped to ad hoc network operation information in a database using a Session Initiation Protocol (SIP) registration algorithm; And
(d) connecting a voice call between the first terminal and the second terminal of the ad hoc network,
And the ad-hoc network operation information is set in the network plan node and the exchange. A subscriber planning and SIP processing integrated operation method for establishing a VoIP system of an ad-hoc network.
The method of claim 1, wherein the step (b)
(b-1) transmitting, by the network planning node, a subscriber information request message for requesting the reception subscriber information to the exchange through a backbone network;
(b-2) the exchange retrieving the subscriber information from the database;
(b-3) transmitting the subscriber information request response message to the network planning node through the backbone network; And
(b-4) storing mapping subscriber information generated by mapping the ad-hoc network operation information to the subscriber information in the database by the network plan node. Subscriber planning and SIP processing integrated operation method.
The method according to claim 1,
The ad-hoc network management information includes an IP address and a frequency. Subscriber planning and SIP processing integrated operation method for VoIP system of ad hoc network.
delete 3. The method of claim 2, wherein step (c)
(c-1) transmitting, by the network planning node, a subscriber information registration request message for registering the mapping reception subscriber information to the proxy node through the backbone network; And
(c-2) storing the mapping receiving subscriber information in the database by the proxy node. The subscriber planning and SIP processing integrated method for establishing a VoIP system of an ad hoc network.
3. The method of claim 2, wherein step (d)
(d-1) transmitting, by the first terminal, a telephone call request message for voice communication to the second terminal to the exchange;
(d-2) the exchange finds mapped receiving subscriber information for the second terminal in the database and transmits an SIP INVITE message to the proxy node;
(d-3) the proxy node creating two separate SIP sessions between the first terminal and the second terminal; And
(d-4) the first terminal transmitting the voice packet to the second terminal through the proxy node using the two SIP sessions; And a subscriber planning and SIP processing integrated operation method for establishing a VoIP system of an ad hoc network. The method according to claim 6,
Wherein the voice packet is an RTP (Realtime Transport Protocol) voice packet including the subscriber information of the second terminal. The subscriber planning and SIP processing integrated operation method for establishing a VoIP system of an ad hoc network.
The method according to claim 1,
Wherein the receiving subscriber information is a CSV subscriber information format in which a subscriber name, an ID, a password, and a telephone number are expressed in a CSV (Comma Separated Value) format.
The method according to claim 1,
Wherein the mapping receiving subscriber information includes subscriber's telephone number information and IP address information in an ad-hoc network.

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