KR101484098B1

KR101484098B1 - method of providing operatiopn of wireless intercom system based on relay expanding mechanism, and computer-readable recording medium for the same

Info

Publication number: KR101484098B1
Application number: KR1020140128047A
Authority: KR
Inventors: 안상기; 박병철
Original assignee: (주)바이컴
Priority date: 2014-09-25
Filing date: 2014-09-25
Publication date: 2015-01-21
Also published as: WO2016047884A1

Abstract

The present invention relates to a wireless intercom technology in which a wireless intercom device is connected in series and each wireless intercom device sequentially repeats data frames to extend the communication distance. More particularly, the present invention relates to a method and apparatus for sequentially connecting a plurality of wireless intercom devices from a highest node (Node (1)) to a lowest node (Node (n)), n) to the Node 1 and the lower node direction (the direction from the Node 1 to the Node (n)), and the individual wireless intercom device sorts and processes the data frames transmitted in both directions To a technology for implementing a wireless intercom system capable of overcoming the limitation of individual communication distance and greatly expanding the effective communication distance.

Description

[0001] The present invention relates to a method and a computer-readable recording medium for a wireless intercom system based on a relay expansion scheme,

The present invention relates to a wireless intercom technology in which a wireless intercom device is connected in series and each wireless intercom device sequentially repeats data frames to extend the communication distance.

More particularly, the present invention relates to a method and apparatus for sequentially connecting a plurality of wireless intercom devices from a highest node (Node (1)) to a lowest node (Node (n)), n) to the Node 1 and the lower node direction (the direction from the Node 1 to the Node (n)), and the individual wireless intercom device sorts and processes the data frames transmitted in both directions To a technology for implementing a wireless intercom system capable of overcoming the limitation of individual communication distance and greatly expanding the effective communication distance.

Generally, in a wireless intercom system supporting group communication, when one device transmits voice data, other devices belonging to the same group can hear the voice, thereby realizing N: N communication.

To this end, the wireless intercom system generally has a communication connection structure as shown in Fig. That is, when one device (device 1) transmits voice data, it transmits it wirelessly to all other devices (devices 2 to n), and these devices receive the wireless signal transmitted by the device 1.

With the adoption of such a configuration, the wireless intercom system can provide a characteristic capable of simultaneous bidirectional communication in a small group without installing a base station or an access point, so that a work group or a hobby group (for example, mountain climbing club, Cycle club) was very suitable for use.

However, as with all wireless communication systems, the wireless intercom system also has to conform to the frequency utilization policy of each country, so that the output power at a specific frequency is limited according to the radio regulations of each country.

Therefore, the wireless signal transmitted by the wireless intercom device is valid only within a certain distance, and thus the wireless intercom system can transmit and receive within effective coverage of several hundred meters.

Although the utilization of the wireless intercom system is inevitably deteriorated due to the narrow coverage, the prior art does not provide a solution to overcome this problem. In particular, it is difficult to apply the conventional approach for eliminating the coverage constraint of wireless communication, that is, the installation of base stations or access points, high frequency band shift, and amplification gain of a wireless power amplifier, in a wireless intercom system.

Accordingly, there is a need in the related art for a technology that can overcome the problem that the effective coverage due to the communication distance restriction is narrowly set in the wireless intercom system to lower the utilization of the wireless intercom.

1. Korean Patent Application No. 10-2008-0020386 entitled "Integrated Repeater and Method of Operation thereof"

2. Korean Patent Application No. 10-2000-7000459 entitled " System and Method for Constructing Intercom and Multi-Voice Channels in a Private Phone System "

3. Korean Patent Application No. 10-2010-0080506 "Digital Wireless Intercom System &

4. Korean Patent Application No. 10-2013-0016688 entitled " Flexible group pairing method based on wireless intercom and wireless intercom system for flexible group pairing "

5. Korean Patent Application No. 10-2013-0016704 entitled "Group Management Method of Wireless Intercom Device Having Selective Subgroup Call Function, and Wireless Intercom System for Optional Subgroup Call Implementation"

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a technology capable of overcoming the limitation of individual communication distance and extending the entire effective communication distance in a wireless intercom system.

In particular, an object of the present invention is to provide a wireless intercom device in which a plurality of wireless intercom devices are serially connected in series from a top node (Node (1)) to a bottom node (Node (n)), ) To the Node (1) and the lower node direction (the direction from the Node (1) to the Node (n)), and the individual wireless intercom devices sum up and process the data frames transmitted in both directions, And to provide a technology for implementing a wireless intercom system capable of overcoming the restriction of communication distance and greatly expanding the effective communication distance.

According to an aspect of the present invention, there is provided a method of operating a relay-based wireless intercom system, the method comprising: (a) registering n (n is a natural number of 3 or more) wireless intercom devices into one group; (b) setting a node (1) as a top node and transmitting a wireless signal to the surrounding area while one wireless intercom device is turned on in the registered group; (c) the remaining wireless intercom devices except for the wireless intercom device corresponding to the node 1 in the registered group are turned on, and the wireless intercom device corresponding to the node 1 is set as the highest node, ) To generate a communication group A; (d) a series of nodes k from the upper node to the lower node in communication group A, where k is a natural number increasing from 1 to n-1, sequentially downward data frames to node (k + 1) Relay transmission; (e) A series of nodes p from the lower node to the upper node in the communication group A, where p is a natural number decreasing from n to 2, sequentially transmits the upward data frame to the node (p-1) The method comprising the steps of:

At this time, in step (d), the node k repeats the self-generated data frame on the downward data frame and transmits the data frame to the node k + 1, and in step (e) To the node (p-1) on the upstream data frame.

(F) If the communication link between a specific node (k-1) and a node (k) is broken in the communication group A, the node (1) Dividing the communication group B and the communication group C having the node (k) as the highest node and the node (n) as the lowest node; (g) When the communication link between node k-1 of communication group B and node k of communication group C is restored, node 1 and node n are removed from communication group B and communication group C, respectively. And recovering the communication group A having the lowest node.

The step (c) of the method of operating the wireless intercom system of the present invention is characterized in that the step (c) identifies a radio signal transmitted from the node (k-1) linked to the node (1) (K) sends a link request command to node (k-1); node (k-1) identifies a link request command of node (k) (K) is synchronized to a lower node of the node (k-1), and a step of waiting for a connection request of the lower node to the node (k) while transmitting a wireless signal to the node From the node 1 to the node n by repeating the operation from the node 2 to the node n.

In the method of operating the wireless intercom system of the present invention, the step (f) includes the steps of (1) to (k-1) when the communication link between the node (k- (K) to a higher-level node of the communication group C, and maintaining the communication group B as a separate communication group; A series of nodes belonging to the lower node direction sequentially transmit the node change command to the lower node and the lower node that has identified the node change command performs the lower node change to perform communication group C and communication group C different from communication group B .

In the method of operating the wireless intercom system of the present invention, step (g) includes the steps of: identifying a radio signal transmitted by node k of communication group C at node k-1 of communication group B; ) Sequentially transmits a link release command to the lower node to depart from the communication group C and sends a link request command to its upper node, and the upper node And synchronizing the child node to its child node.

Meanwhile, a computer-readable recording medium according to the present invention records a program for executing a method of operating a relay-based wireless intercom system such as the above.

According to the present invention, it is possible to overcome the limitation of the individual communication distance in the wireless intercom system and to extend the entire effective communication distance.

In addition, according to the present invention, in a wireless intercom system operating on a relay extension system, even if a communication link is temporarily disconnected in some of wireless intercom devices serially connected, the wireless intercom system can flexibly cope with the problem and maintain the operation of the wireless intercom system without any problem There are advantages.

1 is an exemplary diagram of a wireless intercom system according to the present invention;
FIG. 2 is a diagram illustrating a concept that a downward data frame and an uplink data frame are transmitted in serial in the present invention;
3 is a diagram illustrating a concept of adding a data frame generated by an individual node while relaying data frames in the present invention;
4 is an exemplary diagram illustrating a concept of avoiding a frequency band collision of wireless communication in a wireless intercom system according to the present invention;
5 illustrates a configuration of a data frame in a wireless intercom system according to the present invention.
6 is a diagram showing a field configuration of a control packet in the present invention,
7 is a conceptual diagram illustrating a process of temporarily separating and managing a plurality of communication groups when some communication links are disconnected in the same communication group in the wireless intercom system according to the present invention;
8 is a conceptual view illustrating a process of recovering a communication group when the communication link temporarily lost from the same communication group is restored in the wireless intercom system according to the present invention;
FIG. 9 is a flowchart illustrating an overall process of a method of operating a relay-based wireless intercom system according to the present invention;
10 is a diagram illustrating a communication example of a wireless intercom system according to the related art.

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

1 is an exemplary diagram of a wireless intercom system according to the present invention. Referring to FIG. 1, a wireless intercom system according to the present invention registers a plurality of wireless intercom devices as a group. In this specification, the number of wireless intercom devices is represented by n (where n is a natural number of 3 or more). When n devices are registered as one group, communication is set to be performed in a predetermined frequency band only among devices in the group.

In the present invention, as shown in FIG. 1, n wireless intercom devices are serially linked in sequence from the Node 1 to the Node (n) to create a communication group ('Communication Group A'). Each node in the cascade-connected communication group A relays data frames serially, and the relay frame transmission method will be described in detail below with reference to FIG. 2 and FIG. 3.

FIG. 2 is a diagram illustrating a concept in which a downward data frame and an upward data frame are transmitted in serial in the present invention. FIG. 3 is a diagram illustrating an example in which an individual node repeats a data frame, Is added.

A process of transmitting and receiving data frames including voice data in the wireless intercom system of the present invention connected in series from the Node 1 to the Node (n) will be described with reference to FIGS. 2 and 3.

Referring to FIG. 2, when the Node 1 generates a data frame 1 in the communication group A and transmits the data frame 1 in the direction of the lower node, the Node 2 or Node (n-1) sequentially transmits the data frame 1 And transmits it to the Node (n), thereby performing wireless intercom communication in the direction of the lower node.

In the communication group A, when the Node (n) generates the data frame (n) and transmits it to the upper node, the Node (n-1) to the Node (2) sequentially relay the data frame ), Through which the wireless intercom communication in the direction of the upper node is performed.

Referring to FIG. 3, in the process of successively repeating the data frames in the lower node direction and the upper node direction, the nodes in the middle of the relay path, i.e. Node (2) to Node (n-1) Data frames (voice data) are additionally laid out and relayed on the route.

For example, let us consider a case where the Node (p) receives a user's voice from a microphone and generates a data frame (p) containing voice data. At this time, in the direction of the upper node, the Node (p) adds the data frame p generated by itself to the data frame received from the Node (p + 1) and transmits it to the Node (p-1). In addition, in the lower node direction, the Node (p) adds the data frame p generated by itself to the data frame received from the Node (p-1) and transmits it to the Node (p + 1).

Accordingly, the Node (p) can transmit the data frame generated by the Node (p) to other wireless intercom devices belonging to the communication group A. Similarly, the Node (p) can output voice data generated in other wireless intercom devices belonging to the communication group A by summing and processing the data frames transmitted to the node (p) in the lower node direction and the upper node direction.

On the other hand, it is preferable that the data frame in the lower node direction is periodically transmitted by the highest node Node (1). It is also preferable that the data frame in the direction of the upper node is periodically transmitted by the lowest node Node (n).

4 is an exemplary diagram illustrating a concept of avoiding a frequency band collision of wireless communication in a wireless intercom system according to the present invention. 4, a packet of a data frame transmitted to each node in a group is composed of a control packet CP and a plurality of data packets DP1 to DP4. In order to avoid mutual frequency collision during transmission, different frequency groups are configured and operated between the nodes.

For example, the data frame transmission between Node (1) and Node (2) carries voice data in the data packets "DP3 (down)" and "DP4 (up) The frequency group FG (2) is used. It is also possible to avoid frequency collision by using the first frequency group FG (1) at this time between "DP1 (up direction)" and "DP2 (down direction)" between the Node 2 and the Node 3. do.

FIG. 5 is a diagram illustrating an example of a data frame in a wireless intercom system according to the present invention. FIG. 6 is a diagram illustrating an example of a field configuration of a control packet in the present invention. In the present invention, as shown in FIG. 5, a data frame transmitted / received between nodes in the wireless intercom system is composed of one control packet CPx and a plurality of data packets DPx. In addition, five superframes are formed by grouping these data frames, for example, and these superframes are sequentially and repeatedly repeated to maintain data transmission / reception in the wireless intercom system.

Here, the control packet (CPx) is a packet for transmitting / receiving control information between the devices and information data for achieving synchronization when linking each node, and FIG. 6 shows a field configuration of the control packet .

A data packet (DPx) is a region for compressing and transmitting voice data input from each node

In the present invention, the control packet CPx and the data packet DPx are determined in the order of the node, the frame, the upper / lower node according to the packet order, and the transmission / reception mode. Preferably, the control packet is transmitted and received to the upper node direction and the lower node direction through the control packet CPx during one super frame. In addition, voice data packets can be transmitted and received once in a direction of an upper node and a lower node through a data packet DPx during one frame.

7 is a conceptual diagram illustrating a process of temporarily separating and managing a plurality of communication groups when some communication links are disconnected in the same communication group in the wireless intercom system according to the present invention.

[Fig. 7] shows a case in which each node moves individually in the communication group A composed of the Nodes 1 to n (n), and the communication link is disconnected as the distance between the Node (k-1) and the Node . When the link between Node (k-1) and Node (k) is cut off, all communication group A has communication group B and Node (k) with Node (1) as the highest node and Node (k- (N) as the highest node and Node (n) as the lowest node.

Subsequently, Node (k), which is the highest node of communication group C, transmits a node change command to change to the lower node according to the top node change of Node (k) with respect to another node, e.g. Node (k + 1) +1) changes the node (k) to the highest node and changes it to the lower node corresponding thereto. This process is repeated for the remaining nodes, that is, Node (k + 2) to Node (n) to generate a separate communication group C divided from communication group B.

8 is a conceptual diagram illustrating a process of recovering a communication group when a communication link temporarily lost from the same communication group is restored in the wireless intercom system according to the present invention.

8, it is assumed that the communication group B consisting of the Node (1) to Node (k-1) and the communication group C consisting of the Node (k) to the node (n) temporarily operate as separate communication groups The communication group B and the communication group C devices are close to each other and the communication link is restored. It is assumed that the communication link between the Node (k-1) of the communication group B and the Node (k) of the communication group C is restored.

As the communication link is restored, Node (k-1) and Node (k) are reconnected, so communication group B and communication group C make Node (1) the highest node and Node (n) Quot; A " This is possible because communication groups B and C were temporarily divided and operated respectively, but were registered in the same communication group at the beginning. That is, when Node (k-1) and Node (k) are close to each other, it becomes possible to physically communicate with each other. Immediately, these devices recognize that they are devices belonging to the same communication group and perform the recovery process of FIG. 8 .

Specifically, as shown in FIG. 8, when the radio intercom system is divided into the communication group B and the communication group C and the radio intercom system operates as a separate group, the Node (k) of the communication group C is connected to the Node (k- Node k transmits a link release command to Node (k + 1) to leave the communication group C, and transmits a link request command to Node (k-1). Node (k-1) identifies the link request command of Node (k) and sets Node (k) as a lower node and synchronizes.

The link release process between Node (k) and Node (k) and Node (k-1) to Node (k) (K + 1) to Node (n) are also returned to the communication group A through the above process.

FIG. 9 is a flowchart illustrating an overall process of a method of operating a relay-based wireless intercom system according to the present invention. Referring to FIG. 9, a process of operating the wireless intercom system according to the present invention will be described below.

Step S110: A plurality of (n, where n is a natural number of 3 or more) wireless intercom devices are registered as one communication group. When n devices are registered as one communication group, voice data communication is set to be performed in a specific frequency band only among devices in the registered group.

Step S120: One radio intercom device is turned on in the registered group to search for radio signals in the same group. If a radio signal in the group is not detected after the search, it is set to Node (1), which is the highest node in the group, and the radio signal is broadcasted to the neighbor.

Step S130: Then, the radio intercom devices except for the Node 1 in the registered group search sequentially for radio signals in the group, thereby identifying the Node 1, (N) as the uppermost node and the lowest node (Node (n)).

Specifically, a link process with the Node 2 that is linked to the Node 1 will be described as follows.

The Node 2 is turned on after the Node 1 is set as the highest node of the communication group A in S110. The Node 2 searches for a radio signal in the group and senses a radio signal transmitted from the Node 1. The Node 2 transmits a link request command to the Node 1 to link to the lower node. Next, the Node 1 identifies the link request command of the Node 2 and synchronizes the Node 2 with the lower node. When the Node 2 synchronizes with the lower node of the Node 1, the Node 2 transmits a radio signal to the Node 2 and waits for a connection request of the lower node to the Node 2 from another device.

Next, a process of linking with the Node 3 that is linked to the Node 2 will be described.

The Node 3 is turned on after the Node 2 is synchronized with the lower node of the Node 1 as described above. The Node 3 searches for a radio signal in the group and senses a radio signal transmitted from the Node 2. The Node 3 transmits a link request command to the Node 2 to link to the lower node. The Node (2) identifies the link request command of the Node (3) and synchronizes the Node (3) to its lower node. When the Node 3 is synchronized to a lower node of the Node 2, the Node 3 transmits a radio signal to the Node 3 and waits for a connection request of the lower node to the Node 3 from another device.

Here, the Node 3 also senses a radio signal transmitted from the Node 1 in the group. When the Node 3 transmits a link request command to the Node 1 and the Node 1 transmits a link request When the command is identified, the Node 1 has already synchronized the Node 2 to its lower node, so the node 3 sends a connection rejection message to the link request command of the Node 3 to reject the link request of the Node 3. [

The link process of the Node 4 to the Node n is repeatedly performed so that the Node 3 described above links to the Node 2. Eventually the Node 1 is linked to the Node Synchronize.

Steps S140 and S150: A process of transmitting and receiving data frames in a wireless intercom system connected in series from the Node (1) to the Node (n) will be described. Referring to the direction of the lower node, a series of Node (k) (where k is a natural number increasing from 1 to n-1) from an upper node to a lower node in the communication group A as shown in FIG. 2, (k + 1) in the downward direction. In the direction of the upper node, a series of Node (p) from the lower node to the upper node in the communication group A (where p is a natural number decreasing from n to 2) And sequentially relays data frames.

In addition, when relaying the data frame in the direction of the upper node and the direction of the lower node as shown in FIG. 3, the intermediate nodes transmit the data frame (voice data) generated by itself and relay it together. As a result, the voice data generated by the individual wireless intercom device can be transmitted to other devices in the communication group.

Step S160: If communication is interrupted due to an increase in the separation distance between the Node (k-1) and the Node (k) in the communication group A as shown in FIG. 7, Node (1) As a lowest node, and a communication group C, in which Node (k) is the highest node and Node (n) is the lowest node.

More specifically, if the communication link between the Node (k-1) and the Node (k) in the communication group A is disconnected, the communication group B composed of the Node (1) Node (k) releases the upper link to Node (k-1) and changes it to the top node of communication group C.

Subsequently, Node (k + 1) sends a Node change command to Node (k) to Node (k + 1) to change to the lower node according to the change of the uppermost node of Node (k) And changes the node to a lower node of the Node (k). Also, in the Node (k + 1) to Node (n), the link reset process described above is repeated to create a communication group C that is different from the communication group B.

Step S170: When the mutual communication is resumed due to the decrease in the separation distance between the Node (k-1) and the Node (k) which are temporarily divided and managed as separate communication groups as shown in FIG. 8, (1) as the highest node and Node (n) as the lowest node.

In detail, as shown in FIG. 8, when the Node (k) identifies the radio signal of the Node (k-1) while the radio intercom system is divided into the communication group B and the communication group C and operates as a separate group, Sends a link request command to Node (k-1), and then transmits a link release command to Node (k + 1) And synchronizes the Node (k) to the lower node.

Node k (k + 1) to Node (n) of communication group C are also subjected to a link release process between Node (k) and Node (k + 1) The link group A is restored by sequentially synchronizing the link establishment process to the lower link of the Node (k).

The present invention can also be embodied in the form of computer readable code on a computer readable recording medium. At this time, the computer-readable recording medium includes all kinds of recording apparatuses in which data that can be read by a computer system is stored.

Examples of the computer-readable recording medium include a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, an optical data storage, and the like, and may be implemented in the form of a carrier wave . The computer-readable recording medium can also be stored and executed by a computer-readable code in a distributed manner on a networked computer system. And functional programs, codes, and code segments for implementing the present invention can be easily deduced by programmers skilled in the art to which the present invention belongs.

Claims

(a) registering n wireless intercom devices (where n is a natural number of 3 or more) into one group;
(b) setting one of the wireless intercom devices in the registered group as a node (1) as a top node and transmitting a wireless signal to the surrounding node;
(c) a wireless intercom device corresponding to the node (1) is turned on while the remaining wireless intercom devices except for the wireless intercom device corresponding to the node (1) in the registered group are turned on, (n) to generate a communication group A;
(d) a series of nodes k from the upper node to the lower node in the communication group A (k is a natural number increasing from 1 to n-1) are sequentially transmitted to the node (k + 1) ;
(e) a series of nodes p from the lower node to the upper node in the communication group A (where p is a natural number decreasing from n to 2) sequentially relay the upward data frames to the node (p-1) Transmitting;
Based on the number of times that the wireless intercom system is operating.

The method according to claim 1,
In step (d), the node k relays the self-generated data frame to the node (k + 1) by placing the data frame on the downward data frame,
Wherein the node p broadcasts its own data frame on the uplink data frame and transmits the data frame to the node p-1 in step (e).

The method of claim 2,
(f) a communication link in which the node (1) is the highest node and the node (k-1) is the lowest node when the communication link between the node (k-1) Dividing the group B into a communication group C having the node (k) as the highest node and the node (n) as the lowest node;
(g) when the communication link between the node (k-1) of the communication group B and the node (k) of the communication group C is recovered, the node (1) becomes the highest node from the communication group B and the communication group C Recovering the communication group A with the node (n) as the lowest node;
Further comprising the steps of: (a) receiving a message from the wireless intercom system;

The method of claim 3,
The step (c)
Identifying a radio signal transmitted at the node (1) or a node (k-1) linked to a lower node of the node (1) while the node (k) is turned on;
The node (k) sending a link request command to the node (k-1)
Wherein the node (k-1) identifies a link request command of the node (k) to synchronize the node (k) to a lower node,
When the node k is synchronized to a lower node of the node k-1, the node k waits for a connection request of the lower node to the node k while transmitting a wireless signal to the surrounding node k
Is sequentially connected in series from the node (1) to the node (n) by repeating the steps from the node (2) to the node (n).

The method of claim 4,
The step (f)
(1) to the node (k-1) as a separate communication group if the communication link between the node (k-1) and the node (k) is broken in the communication group A , &Lt; / RTI &
Releasing the upper link to the node (k-1) and changing it to the highest node of the communication group C;
Wherein a series of nodes belonging to a lower node direction of the node k sequentially transmit a node change command to the lower node and the lower node that has identified the node change command performs a lower node change
To generate the communication group (C) different from the communication group (B).

The method of claim 5,
The step (g)
Identifying a radio signal transmitted by the node (k) of the communication group C at the node (k-1) of the communication group B;
A series of nodes belonging to the lower node direction of the node k sequentially transmit a link release command to the lower node to depart from the communication group C and transmit a link request command to its upper node, The parent node identifying the command synchronizes the child node with its child node
Wherein the second wireless intercom system is configured to transmit the second wireless intercom system to the second wireless intercom system.

A computer-readable recording medium storing a program for causing a computer to execute a method of operating a relay-based wireless intercom system according to any one of claims 1 to 6.