KR20220048294A - Voice packet communication device and control method thereof - Google Patents

Abstract

The present invention relates to a voice packet communication device and a control method thereof, which can stably support voice communication in a communication environment in which communication resources are not sufficient as in a military operation environment. According to one embodiment of the present invention, a voice packet communication method comprises: a step of setting a voice service section from the time when a voice packet is first received until a final voice packet is received; a step of storing or updating continuous packet information included in the voice packet received during the set voice service section; and a step of using the continuous packet information during the set voice service section to perform signal processing on received voice information. The continuous packet information includes continuous packet number information and packet information for signal processing of the voice packet received during the set voice service section.

Description

Voice packet communication device and control method thereof

The present invention relates to a voice packet communication apparatus capable of stably supporting voice communication in a communication environment in which communication resources are insufficient, such as in a military operating environment, and a method for controlling the same.

The content described in this section merely provides background information for the present embodiment and does not constitute the prior art.

A general wireless communication method is being operated in a communication environment in which a wired or related infrastructure capable of high-speed data communication is sufficiently established. A communication service is largely divided into a data service and a voice service according to the type of information to be transmitted.

The data service generally requires high reliability, but there is no time limit, so a stable service is performed through a retransmission technique. However, in the case of a voice service, it is less sensitive to information distortion below a certain level by the voice codec that performs voice signal processing based on the continuity of the voice signal and the listener's intelligent analogy, but the voice should be serviced in real time without interruption.

In particular, the communication environment in the military operation environment is very poor because communication resources are not sufficient, and noise and interference signals are included in the voice signal due to a jamming attack that intentionally interferes with communication from the outside. In addition, in the case of voice communication in a military operating environment, such as frequent changes in the radio wave environment due to frequent movement of communication terminals, reception information may be distorted or voice communication may be interrupted due to various performance degradation factors. does not exist.

As shown in FIG. 1, the conventional early wireless communication system used a circuit exchange method in which one terminal completely occupies and uses a frequency band for communication due to the lack of a large amount of data distribution.

However, as the number of communication terminals gradually increases, a plurality of terminals are operated in the same frequency band due to the limitation of frequency resources. At this time, in order to operate the same frequency band by a plurality of communication terminals, as shown in FIG. 2 , a packet switching method in which transmission information is configured in small packet units and a shared frequency band is occupied for a short time was used.

Packet communication occupies a finite frequency resource for a short time, and a plurality of communication terminals efficiently share and use the communication resource. At this time, each communication terminal composes the information desired to be transmitted at an arbitrary time in a packet of an appropriate size, and transmits the signal through a predetermined time or contention according to the medium access control technique used in the system. At this time, various packets are generated according to the size of the packet and the type of information included, and packet information is included in all transmission packets so that the receiving terminal can accurately receive them.

However, when the environment for performing communication is poor, signal distortion occurs, and when the degree of distortion is severe, an error of received information occurs. In particular, when an information error occurs in the packet information, accurate signal processing is impossible at the receiving terminal, and in this case, the corresponding packet is discarded.

That is, the conventional packet processing for voice service control has a simple structure in which packet information is checked and a corresponding reception operation is performed for each packet. Accordingly, as shown in FIG. 3 , packet processing is performed for a short packet section even though voice packets are periodically generated for a voice service. That is, it is a method in which signal processing is performed individually for each packet.

Due to such a packet control method, in the case of a conventional voice service, in order to continuously reproduce voice without interruption, signal processing must be performed for each voice packet without loss. That is, if a packet is discarded due to a packet information error or a preamble information error for an arbitrary voice packet, voice disconnection occurs, which makes a smooth voice service impossible.

In particular, in communication systems that require clear communication in real time, such as military command and control, air traffic control, etc., voice interruption caused by packet discarding due to packet information errors or preamble information errors is a fatal defect factor for each system (or operating environment). It caused problems to work.

Accordingly, it is an object of the present invention to provide a voice packet communication apparatus capable of stably supporting a continuous voice service signal based on packet communication and a control method thereof.

Another object of the present invention is to provide a voice packet communication apparatus and a control method for setting a voice service section in a wireless communication environment and enabling a seamless voice service using continuous packet information during the voice service section.

Another object of the present invention is to provide a voice packet communication apparatus and a method for controlling the same, which set a voice service section in a wireless communication environment and enable a seamless voice service using an initial voice packet.

Another object of the present invention is to provide a voice packet communication device and a method for controlling the same, which set a voice service interval in a wireless communication environment and enable voice service using a periodic resynchronization signal even when an initial voice packet is not received. is in

Another object of the present invention is to provide a voice packet communication apparatus and a method for controlling the same, which can secure a desired idle interval between voice transmission packets by setting a voice service interval in a wireless communication environment and varying the number of voice collections.

In order to solve the above technical problem, a voice packet communication method according to an embodiment of the present invention includes the steps of: setting a voice service interval from a first voice packet reception point to a final voice packet reception time; storing or updating continuous packet information included in a voice packet received during a set voice service interval; and performing signal processing of the received voice information using continuous packet information during a set voice service period, wherein the continuous packet information includes packet information and continuous packets for signal processing of a voice packet received during the set voice service period. Includes count information.

Preferably, continuous packet information is included in all received voice packets during the set voice service interval.

Preferably, it is updated when continuous packet information included in a voice packet received during the set voice service interval is in a normal state.

Preferably, the received voice packet includes preamble information, continuous packet information, and voice information.

Preferably, when an error is detected in the preamble information in the received voice packet, the received signal processing of the currently received voice packet is performed using continuous packet information obtained from the previously received voice packet.

Preferably, when an error is detected in the continuous packet information in the received voice packet, the received signal processing of the currently received voice packet is performed using the continuous packet information obtained from the previously received voice packet.

Preferably, when the received voice packet is the last voice packet, the set voice service interval is canceled.

Preferably, the voice service section is not a fixed section.

Preferably, the voice service section is updated while information on the number of consecutive packets included in the continuous packet information is changed.

Preferably, in the voice service section, when a voice packet having information on the number of consecutive packets of 0 is received, the voice service section is terminated.

Preferably, the voice service period ends when the number of voice packets deducted every time a voice packet is received becomes 0 based on information on the number of consecutive packets included in the continuous packet information.

Preferably, when voice packet reception starts during the voice service section, the voice service is started using continuous packet information at that point, and when a voice packet having the continuous packet number information of 0 is received, the voice service section ends.

Preferably, when voice packet reception starts during the voice service section, the voice service is started using continuous packet information at that point, and the voice packet is deducted every time a voice packet is received based on the number of consecutive packets included in the continuous packet information. When the count number becomes 0, the voice service period ends.

In order to solve the above technical problem, a voice packet communication method according to an embodiment of the present invention includes the steps of: setting a voice service interval from a first voice packet reception point to a final voice packet reception time; storing or updating continuous packet information included in a voice packet received during a set voice service interval; determining whether resynchronization information including continuous packet information is included in the received packet; and performing signal processing of a received voice packet using continuous packet information during a set voice service period, wherein the continuous packet information is continuous with packet information for signal processing of a voice packet received during a set voice service period. When a packet including packet number information and resynchronization information is received, continuous packet information is stored or updated.

Preferably, continuous packet information is included only in the first transmission packet of the set voice service section.

Preferably, a packet including resynchronization information is received at a predetermined period during the set voice service period.

Preferably, the packet including the resynchronization information includes preamble information and continuous packet information.

Preferably, when a packet including a resynchronization signal is received in a state where a voice service interval is not set, the voice service interval is set, and continuous packet information included in the resynchronization signal is stored or updated.

Preferably, when a packet including a resynchronization signal is received in a state in which the voice service interval is set, continuous packet information included in the resynchronization signal is stored or updated.

Preferably, the voice service section is updated while information on the number of consecutive packets included in the continuous packet information is changed.

In order to solve the above technical problem, a voice packet communication method according to an embodiment of the present invention includes the steps of: setting a voice service interval from a first voice packet transmission point to a final voice packet transmission time; determining whether additional packet transmission is required in addition to the basic transmission packet in the set voice service interval; constructing an additional transmission packet by selectively using a resynchronization signal/voice signal/data signal requiring transmission, and calculating a length of the additional transmission packet; and comparing the length of the additional transmission packet with the idle interval existing between the basic transmission packets to secure an idle interval as needed, wherein the idle interval varies the number of voice collections included in the basic transmission packet to collect voices. adjust the cycle

In order to solve the above technical problem, a voice packet communication apparatus according to an embodiment of the present invention includes: a setting module for setting a voice service interval from a time when a first voice packet is received until a final voice packet is received; a storage module for storing or updating continuous packet information included in a voice packet received during a set voice service interval; and a signal processing module for performing signal processing of a received voice packet using continuous packet information during a set voice service period, wherein the continuous packet information includes packet information for signal processing of a voice packet received during a set voice service period and continuous packet count information.

In order to solve the above technical problems, a voice packet communication apparatus of a walkie-talkie according to an embodiment of the present invention includes: a voice input/output module for input/output of a voice signal; a modem that receives, demodulates and transmits a radio signal; a packet management module for setting a voice service section using voice packets received through a modem and managing voice packets received within the voice service section; and a voice processing module that performs signal processing of the voice packet received through the packet management module and transmits the signal to the voice input/output module, wherein the packet management module provides voice services from the time the voice packet is first received until the final voice packet is received. A section is set, and continuous packet information included in a voice packet received during the set voice service section is stored or updated.

Preferably, it further includes a data input/output module that receives a data signal from the packet management module and transmits it to an external data terminal.

The voice packet communication apparatus and the control method of the present invention can stably support a continuous voice service signal based on packet communication even in an environment where communication resources are scarce, such as a radio operated in a military operating environment.

In particular, the present invention establishes a voice service section in a wireless communication environment and enables a seamless voice service by using continuous packet information during the voice service section.

In addition, the present invention establishes a voice service section in a wireless communication environment and enables a seamless voice service using an initial voice packet.

In addition, the present invention establishes a voice service interval in a wireless communication environment and enables voice service by using a periodic resynchronization signal even when an initial voice packet is not received.

The present invention establishes a voice service section in a wireless communication environment, secures a desired idle section between voice transmission packets by varying the number of voice collections, and enables additional packet transmission in the idle section.

1 shows an exemplary diagram of a circuit switching scheme in a conventional wireless communication system.
2 is a diagram illustrating an exemplary packet switching scheme in a conventional wireless communication system.
3 is a diagram illustrating an example of a packet voice service in a conventional wireless communication system.
4 is a diagram showing the overall configuration of a voice packet communication apparatus according to an embodiment of the present invention.
5 is an exemplary diagram of a packet voice service applied to a voice packet communication apparatus according to an embodiment of the present invention.
6 is a control flowchart of a voice packet transmission service according to an embodiment of the present invention.
7 is a diagram illustrating an example of a voice packet transmission service according to an embodiment of the present invention.
8 is a control flowchart of a voice packet transmission service according to an embodiment of the present invention.
9 shows an exemplary diagram of a voice packet configuration according to an embodiment of the present invention.
10A shows an exemplary diagram in the case of having a short voice collection period.
10B shows an exemplary diagram in the case of having a long voice collection period.
11 is a diagram illustrating an example of a variable voice collection cycle in the voice processing module according to an embodiment of the present invention.
12 is a flowchart showing a control flow for adjusting the number of voice collections according to an embodiment of the present invention.

Hereinafter, the embodiments disclosed in the present specification will be described in detail with reference to the accompanying drawings, but the same or similar components are assigned the same reference numbers regardless of reference numerals, and redundant description thereof will be omitted. The suffixes "part" and "group", "module" and "part", "unit" and "part", "device" and "system", "terminal" and "node" for components used in the description below. and "digital walkie-talkie" are given or mixed in consideration of only the ease of writing the specification, and do not have distinct meanings or roles by themselves.

In addition, in describing the embodiments disclosed in the present specification, if it is determined that detailed descriptions of related known technologies may obscure the gist of the embodiments disclosed in this specification, the detailed description thereof will be omitted. In addition, the accompanying drawings are only for easy understanding of the embodiments disclosed in the present specification, and the technical idea disclosed herein is not limited by the accompanying drawings, and all changes included in the spirit and scope of the present invention , should be understood to include equivalents or substitutes.

Terms including an ordinal number such as 1st, 2nd, etc. may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

When an element is referred to as being “connected” or “connected” to another element, it is understood that it may be directly connected or connected to the other element, but other elements may exist in between. it should be On the other hand, when it is said that a certain element is "directly connected" or "directly connected" to another element, it should be understood that the other element does not exist in the middle.

The singular expression includes the plural expression unless the context clearly dictates otherwise.

In the present application, terms such as “comprises” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. It is apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit and essential characteristics of the present invention.

4 is a diagram showing the overall configuration of a voice packet communication apparatus according to an embodiment of the present invention. The illustrated embodiment is applicable to a radio or the like used in a military operating environment.

The voice packet communication apparatus includes a voice input/output module 10 , a data input/output module 20 , a voice processing module 30 , a packet management module 40 , and a modem 50 . The voice packet communication apparatus of the present invention can be used as a transmitting terminal or a receiving terminal. In the following description, although it will be described as a receiving terminal in many parts, it is defined in advance that it is sufficiently applicable to a transmitting terminal.

The voice input/output module 10 digitizes an analog voice input signal through a voice input device such as a microphone and transmits it to the voice processing module 30, or receives the voice signal received from the voice processing module 30 through an output device such as a speaker. A device and program that outputs.

The voice processing module 30 is a device and program that performs voice signal processing in order to efficiently transmit and receive digital voice signals. Voice codec (eg G.711, G.729, G.723, MELP, etc.) for effective compressed transmission of voice signals is used, and voice collection for stable voice service considering the bit rate and encoding time of the voice codec adjust the cycle The voice collection cycle is preset and used.

The data input/output module 20 transmits data transmitted from an external terminal or digital data generated by a data generator included therein to the packet management module 40, and receives a data signal from the packet management module 40 It is a device and program that transmits to a terminal or to a data collector included in it.

The packet management module 40 constructs a packet so that the data received from the voice processing module 30 and the data input/output module 20 can be transmitted without interruption and stably, and transmitted to the modem 50 . And it is a device and program that classifies the voice or data packet signal received from the modem 50 , transmits the voice packet to the voice processing module 30 , and transmits the data packet to the data input/output module 20 . The packet management module 40 removes redundant signals or transmits and controls resynchronization packets in order to increase network efficiency.

The modem 50 modulates the voice packet or data packet received from the packet management module 40 into a radio signal based on a predetermined modulation/demodulation method (eg, CPM, MSK, PSK, QAM, etc.) and transmits the modulated signal. The modem 50 is a device and program that receives a radio signal from the outside, demodulates it using a predetermined modulation/demodulation method, and transmits it to the packet management module 40 .

In the present invention, the packet management module 40 may be described as a control module. That is, the packet management module 40 may include a setting module for setting a voice service section from the time the first voice packet is received until the last voice packet is received. The packet management module 40 may include a storage module for storing or updating continuous packet information included in a voice packet received during a set voice service interval.

In addition, the voice processing module 30 of the present invention can be described as a signal processing module that performs signal processing of a received voice packet using continuous packet information during a set voice service section in the packet management module 40 .

5 is an exemplary diagram of a packet voice service applied to a voice packet communication apparatus according to an embodiment of the present invention.

The present invention is characterized in that it reflects the characteristics of a voice signal in which voice is continuously serviced in real time only when voice signal processing is performed based on continuity. That is, the present invention sets a 'voice service section' from the start point to the end point of a voice service instead of processing a single packet by reflecting the characteristics of a continuous voice signal, and processes voice packet signals through continuous transmission and reception of voice packets. carry out

According to the present invention, 'continuous packet information' is included in the voice transmission packet and transmitted during the voice service interval. The continuous packet information is included in all voice transmission packets during the voice service interval.

As shown in FIG. 5 , a plurality of voice transmission packets are transmitted during the voice service period from the start time to the end time of the voice service. In this case, continuous packet information is included in each voice transmission packet. Therefore, each voice transmission packet is configured by including preamble/continuous packet information/voice information.

The continuous packet information included in each voice transmission packet is configured to include information on the number of consecutive packets in addition to packet information required for signal processing of the voice information. In this case, the packet information required for signal processing of the voice information included in the continuous packet information includes the same information for all voice packets in the voice service section. That is, in the voice service section, control information usable for signal processing is included for any voice packet. However, information on the number of consecutive packets included in the continuous packet information is different.

The receiver (or the receiving terminal) of the present invention checks the voice/data setting information of the continuous packet information field of the received packet, and recognizes that continuous voice packets are periodically generated when set to voice. That is, the receiver sets the voice start time of the voice service section when the voice configuration information is first checked in the continuous packet information, and starts counting by checking the continuous packet number information.

The transmitter (or the transmitting terminal) of the present invention transmits the continuous packet information including information on the number of consecutive packets to be transmitted during the voice service period. Therefore, the receiver of the present invention continuously supports the voice service even when errors in the preamble information and the continuous packet information fields occur using continuous packet information. And when continuous packet information is normally received without error, the number of expected continuous voice packets is updated. Then, when the number of continuous packet information becomes 0 because the last voice packet is normally received, or when the number of continuous voice packets becomes 0 by subtracting the voice packet reception counter from the receiver itself for every packet, the voice service section is terminated.

Accordingly, even if an error occurs in voice information or continuous packet information or preamble information included in an arbitrary voice transmission packet, it is possible to receive and demodulate a voice signal based on the continuous packet information included in another voice transmission packet. Therefore, it becomes possible to support the continuity of the voice service.

In particular, when the latest continuous packet information transmitted for every voice transmission packet is received as in the present invention when the channel environment is poor, such as in a military operating environment, normal voice even when the voice service is not normally received at the beginning or in the middle reception becomes possible.

In the present invention, unlike the prior art, since information on the number of consecutive packets to be generated is known in advance for a voice packet signal to be generated at a constant period during the voice service period, regardless of errors in the preamble information or continuous packet information included in continuously received voice packets. It becomes possible to continue the voice service.

In addition, when a network is configured with a plurality of terminals, a terminal that does not participate in a voice service through the reception of a corresponding signal recognizes that a corresponding frequency band is used, thereby preventing intra-network collisions.

6 is a control flowchart of a voice packet transmission service according to an embodiment of the present invention.

In the present invention, as shown in FIG. 5, the voice service section is set from the start time to the end time of the voice service. The voice service interval is set based on information on the number of consecutive packets in the transmitting terminal and the receiving terminal from the time when the voice packet is started to when the voice packet reception is finished.

The voice service section is not a fixed section. In the voice service section, when the first voice packet is received, the voice service section starts, when a voice packet with the number of consecutive voice packets equal to 0 is received, or when the value counted by the receiving terminal becomes the final voice packet, the voice service section is ended And the voice service section is continuously updated based on information (the number of continuous voice packets) transmitted from the transmitting terminal. Therefore, the voice service interval is adjusted based on the information on the number of consecutive voice packets received.

That is, the system has a standby state capable of receiving a voice packet from the outside ( 100 ).

When a voice packet is received (102), the system determines whether it is included in a voice service interval (104). If it is the time when voice packet reception is first started, the system is in a state where the voice service interval is not set. Therefore, the voice service section is set preferentially.

That is, if it is determined in step 104 that it is not a voice service section, it is checked whether there is error information in the received voice packet. When the preamble error 106 and the continuous packet information error 108 are detected, the reception standby state 100 is re-entered. However, in 104, when it is not a voice service section and there is no error information in the received voice packet, it is checked whether it is a final voice packet (110),

If it is determined in step 110 that it is the final voice packet, signal processing for receiving a corresponding voice signal is performed ( 112 ). And when it is not the final voice packet at 110, that is, since the voice service interval is not set at 104, the system sets the voice service interval. Then, continuous packet information included in the received voice packet is stored or updated, and signal processing of the voice signal included in the received voice packet is performed ( 114 ). At this time, since the continuous packet information includes packet information used for signal processing of voice packets received within the voice service section and information on the number of continuous voice packets, it is stored. And when there is already stored continuous packet information, information on the number of consecutive voice packets included in the currently received voice packet is updated.

Next, if the voice service section has already been set in step 104, it is checked whether there is error information in the received voice packet. When a preamble error occurs ( 120 ), continuous packet information received and stored in the previous step is read ( 130 ). In step 130, packet information of a currently received voice packet is received by using the read continuous packet information.

In addition, when an error occurs in the continuous packet information included in the currently received voice packet (132), signal processing of the voice signal included in the currently received voice packet is performed using the stored continuous packet information read in 130 (134). ).

In the process of checking whether a voice service interval has already been established in step 104 and there is error information in the received voice packet, if the preamble information is in a normal state and continuous packet information is in error (122), it is received in the previous step. The stored continuous packet information is read (140). Then, signal processing of the voice signal included in the received voice packet is performed using the previously stored continuous packet information read in 140 (140).

In step 104, when the voice service interval has already been set and the received voice packet has error information, when the preamble information is in a normal state and the continuous packet information is also in a normal state, the currently received voice packet is the final voice packet. Recognition is determined (124). In step 124, whether the last voice packet is a final voice packet corresponds to a case in which information on the number of consecutive voice packets in the continuous packet information is 0 when the last voice packet is normally received. Alternatively, it corresponds to a case in which a value obtained by counting all voice packets received during the voice service section by the receiving terminal is counted as the final voice terminal packet.

If it is determined in step 124 that it is the final voice packet included in the voice service section, signal processing of the voice signal is performed using continuous packet information included in the currently received voice packet ( 142 ). In step 142, the voice service section is canceled. This means that the use of previously stored or currently updated continuous packet information is stopped in the signal processing process of the voice signal.

However, in 124, when it is not the final voice packet included in the voice service section, continuous packet information included in the currently received voice packet is updated, and the voice signal is signal processed using the continuous packet information included in the currently received voice packet. to perform (126).

Next, in the process of checking whether a voice service interval has already been set in step 104 and there is error information in the received voice packet, the preamble information is in an error state, but continuous packet information is determined to be in a normal state (132), the currently received It is checked whether the voice packet is the final voice packet (150). And, if it is not the final voice packet, the continuous packet information in the normal state included in the currently received voice packet is updated, and signal processing of the voice signal is performed using this information ( 152 ).

However, if it is determined at 150 as the final voice packet, signal processing of the voice signal is performed using continuous packet information in a normal state included in the currently received voice packet ( 154 ). In step 154, the voice service section is canceled. This means that the use of previously stored or currently updated continuous packet information is stopped in the signal processing process of the voice signal.

As described above, in the present invention, one voice service section is set from the time the voice service starts to the time the voice service ends. In this voice service section, continuous packet information is included in each transmitted voice packet to perform transmission. Accordingly, the system or terminal that has received the corresponding voice packet updates the continuous packet information in the normal state included in the received voice packet to the latest value during the same voice service period and uses it for signal processing of the voice signal. Therefore, even if any one or all of the preamble information, continuous packet information, or voice information included in an arbitrary voice packet is damaged and discarded, signal processing of a received voice signal is possible by utilizing previously stored continuous packet information.

In particular, the present invention is an embodiment to be applied to a radio used in a military operating environment, and the focus was placed on the fact that the voice service is frequently disconnected due to the frequent movement of the military radio and it is used in an environment in which resources are poor. That is, even when the military radio fails to receive the first voice packet and receives the voice packet in an intermediate stage, it becomes possible to receive a clear voice service using continuous packet information.

Next, FIG. 7 shows an exemplary diagram of a voice packet transmission service according to an embodiment of the present invention.

7, a voice service interval is set from the time the voice service starts to the time the voice service ends, and 'continuous packet information' is transmitted only in the first voice transmission packet during this voice service interval. In addition, in the other voice transmission packets, it is characterized in that only the voice signal is transmitted except for the preamble and packet information, which are conventionally transmitted for every packet.

As described above, in addition to the first continuous packet information transmission during the voice service section, the error probability of the important information transmission section is reduced through the transmission of a short voice packet consisting of only pure voice information excluding the preamble and packet information, and an additional idle space is secured to improve network operation efficiency. can increase

In addition, when the set voice service interval is longer than a predetermined period, a resynchronization signal is periodically transmitted, and based on this, the receiving terminal is controlled to correct time and frequency errors. This is because, when the set voice service interval is too long, a clock error between two terminals performing communication accumulates and performance degradation occurs. Therefore, in order to solve this problem, the present invention is characterized in that, as shown in FIG. 7, when the set voice service interval is longer than a predetermined period, the resynchronization signal is periodically transmitted.

In addition to the purpose of correcting the error of the receiving terminal, the resynchronization signal may be used to receive the resynchronization signal from the receiving terminal that has not received the first voice transmission packet to perform a voice service. In addition, the terminal receiving the resynchronization signal can be used for recognizing that a voice service is being performed in the corresponding communication band.

The resynchronization signal includes preamble information for recognizing a radio signal and continuous packet information. The resynchronization signal is set to be transmitted at a predetermined time point.

And, in the present invention, the resynchronization signal and continuous packet information maximize survivability by applying an error-resistant modulation/demodulation method and a high-performance error correction coding technique (eg, Turbo, LDPC, Polar, etc.).

8 is a control flowchart of a voice packet transmission service according to an embodiment of the present invention.

In the present invention, as shown in FIG. 7 , a voice service interval is set from a voice service start time to an end time. The voice service interval is set in the transmitting terminal and the receiving terminal from the time when the voice packet is started to when the voice packet reception is finished. The setting and determination of the voice service section and the final voice packet described in the operation process of FIG. 8 are performed in the same manner as the processes described with reference to FIGS. 5 and 6 , and thus a redundant description will be omitted.

That is, the system has a standby state capable of receiving a voice packet from the outside ( 200 ).

When a voice packet is received (202), the system determines whether it is included in a voice service interval (204). If it is the time when voice packet reception is first started, the system is in a state where the voice service interval is not set. Therefore, in this case, the voice service section is set.

However, if it is determined in 204 that the voice service interval is not set, it is determined whether the received packet is a resynchronization signal (206), and if it is determined in 206 as a resynchronization signal, a voice service interval is set based thereon (208). In step 208, continuous packet information included in the resynchronization signal is stored or updated.

In step 208, if a packet corresponding to the resynchronization signal is received while the voice service interval is not set, it means that the receiving terminal either failed to receive the first voice packet (including continuous packet information) transmitted from the transmitting terminal, or has already progressed. This is a case in which the receiving terminal enters the corresponding band in the middle of the current voice service section. That is, in this case, the receiving terminal sets the voice service interval and obtains continuous packet information by using the resynchronization signal.

In step 204, when the voice service interval is not set and the received packet is not a resynchronization signal, it is checked whether there is error information in the received voice packet. That is, when a preamble error occurs ( 210 ) or an error occurs in continuous packet information ( 212 ), the system re-enters the reception standby state.

In 204, when the voice service interval is not set and the received packet is not a resynchronization signal, if the preamble information and continuous packet information included in the received voice packet are all in a normal state, the received voice packet is the first time the voice service starts. It is determined as a time point (214). That is, at 214, the voice service section is set. Then, continuous packet information included in the received voice packet is stored or updated, and the voice information included in the received voice packet is signal-processed based on the continuous packet information.

Next, if the voice service interval is already set in step 204, it is determined whether the received packet is a resynchronization signal (220). When the packet received at 220 is not a resynchronization signal, it is determined whether it is a final voice packet ( 222 ).

If it is determined in 222 as the final voice packet, the set voice service section is canceled, and signal processing of the voice signal included in the corresponding voice packet is performed (232). If it is not the final voice packet in step 222, signal processing of the received voice signal is performed using the previously stored continuous packet information (224).

Next, when the voice service interval has already been set in step 204 and the received packet is a resynchronization signal ( 220 ), it is determined whether the resynchronization signal is in error ( 230 ). When the resynchronization signal is in a normal state in step 230, continuous packet information included in the resynchronization signal is updated (234).

In addition, if the voice service interval is already set and the received packet is a resynchronization signal, but it is determined as an error state (230), it re-enters the reception standby state. At this time, it is preferable that the received resynchronization information packet in an error state is discarded.

As described above, in the present invention, one voice service section is set from the time the voice service starts to the time the voice service ends. And in this voice service section, continuous packet information is included in the first transmitted voice packet and transmitted, and the receiving terminal receiving the first voice packet stores the continuous packet information in a memory (storage unit), etc., and uses this information to Thereafter, the voice signal processing of the voice information included in the received packet is performed.

In addition, when the voice service interval is longer than a predetermined interval, a packet including resynchronization information is transmitted at a predetermined period, and the receiving terminal corrects an error of the information by using the resynchronization information. In addition, the receiving terminal that has not received the first voice packet including the continuous packet information can utilize the packet including the resynchronization information to perform voice service signal processing.

Next, FIG. 9 shows an exemplary diagram of a voice packet configuration according to an embodiment of the present invention. Hereinafter, the process of FIGS. 9 to 12 is a control configuration when the voice packet transmission apparatus is applied to and used by the transmitting terminal.

In the voice packet communication device (transmission terminal) of the present invention shown in FIG. 4 , the voice processing module 30 receives a digital voice signal from the voice input/output module 10 and processes the voice signal using the voice codec, It is transmitted to the management module 40 .

At this time, as shown at the top of FIG. 9 , the voice processing module 30 outputs an encoded voice signal having a predetermined size at a predetermined period according to a voice codec to which the input digital voice signal is applied.

And, as shown in the third stage of FIG. 9 , the voice processing module 30 collects the encoded voice signal generated in the encoding cycle in an appropriate size to form one packet. That is, when the previously encoded voice signal is transmitted by forming a packet in the encoded unit each time, the size of the additional information compared to the transmission information is large, and there is a risk that the network operation efficiency may be lowered due to the short period of packet transmission.

In order to improve this problem, in the present invention, the voice signal encoded by the voice processing module 30 is collected in a predetermined size and configured as one packet. Accordingly, as shown at the bottom of FIG. 9, the finally generated voice packet is configured by including an encoded voice signal collected in a predetermined size, continuous packet information, and preamble information.

On the other hand, the time length of the voice packet must be smaller than the voice collection period, which is the product of the encoding period and the number of voice collections, to enable voice transmission and reception.

10A shows an exemplary diagram in the case of having a short voice collection period. As shown in FIG. 10A , when the voice collection period is small, the voice delay is small, but the idle period between voice packets is short, so that the idle period cannot be utilized.

10B shows an exemplary diagram in the case of having a long voice collection period. As shown in FIG. 10B , if the voice collection period is set to be long, the idle period between voice packets becomes large, but there is a problem in that the voice delay is large because voice packets are transmitted after collecting voice for a long time.

Therefore, in the present invention, the voice collection period is varied by adjusting the number of voice collections, so that an idle section of a desired size can be created with a small voice delay.

11 is a diagram illustrating an example of controlling a voice collection cycle in a process of processing a voice signal in the voice processing module according to an embodiment of the present invention.

The voice processing module 30 of the present invention is characterized in that it adjusts the number of voice collections according to operating conditions. That is, it is possible to create an idle section of a desired size with a small voice delay by varying the voice collection period by adjusting the number of voice collections.

The voice processing module 30 outputs an encoded voice signal having a predetermined size at a predetermined period according to the applied voice codec. The encoded voice signal output in this way is collected and controlled to have an appropriate size in the voice processing module 30 to constitute one voice packet.

The voice processing module 30 configures the voice collection period to be variably adjustable. As shown in FIG. 11, the voice collection cycle is variously configured by adjusting the number of voice collections included in the voice packet. That is, it is possible to adjust the number of voice collections according to the operation situation and change the voice collection period to adjust the idle period of a desired size while reducing the voice delay.

In addition, when it is necessary to transmit a resynchronization signal or additional voice/data in one voice service period, it is possible to control transmission of a necessary packet by using the idle period.

12 is a flowchart illustrating a control flow for adjusting the number of voice collections according to an embodiment of the present invention.

When it is determined that a resynchronization signal or additional voice/data transmission is necessary in the voice service section (300, 310), the voice processing module 30 configures a packet to be added and calculates the length of the additional packet (320). The length of the additional packet may be adjusted according to the configuration of the added packet.

When the length of the packet to be added is calculated in step 320, the length of the packet to be added is compared with the idle section (330), and the idle section is increased while gradually increasing the number of voice collections (step 350).

As shown in FIG. 11 , initially, the number of voice collections is set to be small to have a short voice collection period. At this time, the voice delay is short due to the short voice collection cycle.

In addition, when the number of voice collection increases in 350, the idle period is also increased. In 330, the idle period is increased so that the idle period is larger than the additional packet length by comparing the increased idle period with the additional packet length calculated in 320. The voice processing module 30 determines the final number of voice collections ( 340 ) so that an idle interval sufficient to transmit additional packets is secured, and performs variable control of the voice collection period.

Through such control, according to the present invention, relay voice information, resynchronization information, or voice/data information necessary for additional packets can be transmitted and transmitted, thereby improving network efficiency.

The above detailed description should not be construed as restrictive in all respects and should be considered as exemplary. The scope of the present invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the present invention are included in the scope of the present invention.

10: voice input/output module, 20: data input/output module, 30: voice processing module,
40: packet management module, 50: modem

Claims (24)

setting a voice service interval from when the first voice packet is received until the last voice packet is received;
storing or updating continuous packet information included in a voice packet received during a set voice service interval; and
Comprising the step of performing signal processing of the received voice information using continuous packet information during the set voice service interval,
The continuous packet information includes packet information for signal processing of a voice packet received during a set voice service interval and information on the number of consecutive packets. The method according to claim 1,
A voice packet communication method in which continuous packet information is included in all received voice packets during a set voice service interval. 3. The method according to claim 2,
A voice packet communication method that is updated when continuous packet information included in a voice packet received during a set voice service section is in a normal state. 4. The method according to claim 3,
The received voice packet includes preamble information, continuous packet information, and voice information. 5. The method according to claim 4,
A voice packet communication method for performing reception signal processing of a currently received voice packet by using continuous packet information obtained from a previously received voice packet when an error is detected in preamble information in a received voice packet. 5. The method according to claim 4,
A voice packet communication method for performing reception signal processing of a currently received voice packet by using continuous packet information obtained from a previously received voice packet when an error is detected in continuous packet information in a received voice packet. 5. The method according to claim 4,
A voice packet communication method for canceling a set voice service section when the received voice packet is the final voice packet. The method according to claim 1,
The voice service section is not a fixed section, but a voice packet communication method. 9. The method of claim 8,
The voice service section is a voice packet communication method that is updated as information on the number of consecutive packets included in the continuous packet information is changed. 10. The method of claim 9,
The voice service section is a voice packet communication method in which the voice service section is terminated when a voice packet having information on the number of consecutive packets of 0 is received. 10. The method of claim 9,
The voice service section is a voice packet communication method in which the voice service section is terminated when the number of voice packets deducted every time a voice packet is received based on information on the number of consecutive packets included in the continuous packet information becomes 0. 10. The method of claim 9,
A voice packet communication method in which, when a voice packet reception starts during a voice service section, the voice service is started using continuous packet information at that point, and the voice service section is terminated when a voice packet having information on the number of consecutive packets of 0 is received. 10. The method of claim 9,
When voice packet reception starts during the voice service section, the voice service is started using continuous packet information at that point, and the number of voice packet counts deducted every time a voice packet is received based on the continuous packet number information included in the continuous packet information is 0. A voice packet communication method in which the voice service section ends when this occurs. setting a voice service interval from when the first voice packet is received until the last voice packet is received;
storing or updating continuous packet information included in a voice packet received during a set voice service interval;
determining whether resynchronization information including continuous packet information is included in the received packet; and
performing signal processing of a received voice packet using continuous packet information during a set voice service interval;
The continuous packet information includes packet information for signal processing of a voice packet received during a set voice service interval and information on the number of consecutive packets,
A voice packet communication method for storing or updating continuous packet information when a packet including resynchronization information is received. 15. The method of claim 14,
A voice packet communication method in which continuous packet information is included only in the first transmission packet of a set voice service section. 16. The method of claim 15,
A voice packet communication method for receiving a packet including resynchronization information at regular intervals during a set voice service section. 17. The method of claim 16,
A voice packet communication method in which a packet including resynchronization information includes preamble information and continuous packet information. 18. The method of claim 17,
When a packet including a resynchronization signal is received in a state where a voice service interval is not set, a voice packet communication method for setting a voice service interval and storing or updating continuous packet information included in the resynchronization signal. 19. The method of claim 18,
A voice packet communication method for storing or updating continuous packet information included in the resynchronization signal when a packet including a resynchronization signal is received while a voice service section is set. 15. The method of claim 14,
The voice service section is a voice packet communication method that is updated as information on the number of consecutive packets included in the continuous packet information is changed. setting a voice service interval from the time of transmitting the first voice packet to the transmission of the final voice packet;
determining whether additional packet transmission is required in addition to the basic transmission packet in the set voice service interval;
constructing an additional transmission packet by selectively using a resynchronization signal/voice signal/data signal requiring transmission, and calculating a length of the additional transmission packet; and
Comprising the step of comparing the length of the idle interval between the basic transmission packet and the additional transmission packet to secure an idle interval as needed,
The idle section is a voice packet communication method in which a voice collection period is adjusted by varying the number of voice collections included in a basic transmission packet. a setting module for setting a voice service section from the time of receiving the first voice packet to receiving the final voice packet;
a storage module for storing or updating continuous packet information included in a voice packet received during a set voice service interval; and
A signal processing module for performing signal processing of a received voice packet using continuous packet information during a set voice service interval,
The continuous packet information includes packet information for signal processing of a voice packet received during a set voice service interval and information on the number of consecutive packets. a voice input/output module for input/output of voice signals;
a modem that receives, demodulates and transmits a radio signal;
a packet management module for setting a voice service section using voice packets received through a modem and managing voice packets received within the voice service section;
A voice processing module that performs signal processing of the voice packet received through the packet management module and transmits it to the voice input/output module;
The packet management module sets the voice service section from the time the voice packet is first received until the last voice packet is received,
A voice packet communication device of a radio that stores or updates continuous packet information included in a voice packet received during a set voice service section. 24. The method of claim 23,
The voice packet communication device of the radio further comprising a data input/output module for receiving a data signal from the packet management module and transmitting the data signal to an external data terminal.

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