JP2022017868A - Communication control device and communication system - Google Patents

Abstract

To provide a communication control device capable of avoiding waiting for voice reproduction in a terminal.SOLUTION: A telephone GW 100 includes: a packet generation unit 103 that, when an incoming answer signal for an outgoing from a calling terminal 200 is received from a called terminal 300, processes information (sequence number SN in the present disclosure) contained in a packet transmitted from the called terminal 300 into information that is inconsistent with information (sequence number SN) contained in a packet received most recently and generates a packet containing the processed information; and a communication unit 101 that transmits the generated packet to the calling terminal 200.SELECTED DRAWING: Figure 2

Description

The present invention relates to a communication control device and a communication system that control communication of a communication terminal.

When transitioning from RBT (Ringback tone) to a call when making a voice call by a calling terminal, the source of the voice packet by RTP (Real-time Transport Protocol) is changed from the sound source device to the receiving terminal. At this time, the source of each voice packet independently assigns the source (SSRC: Synchronization Source), sequence number (SN), and time stamp (TS) information. The telephone gateway (GW) performs processing such as reassignment of SSRC having the same value and reassignment of SN having continuity to the received voice packet (see Non-Patent Document 1). The transmitting terminal refers to the source SSRC and the sequence number SN to perform a voice packet reproduction process.

IETF RFC 3550

In the above non-patent document 1, the telephone GW further generates a time stamp TS obtained by adding a constant value to the time stamp TS given by the sender. Then, in recent years, in a specific terminal, a voice packet is reproduced with reference to the time stamp TS. For example, a specific terminal that receives this voice packet considers that a continuous sequence of voice packets has been transmitted from the same device, but the time stamp TS is a value that is farther than the value of the time stamp TS of the preceding voice packet. In that case, the process of waiting for the reproduction of the subsequent voice packet is performed on the specific terminal. As a result, the specific terminal cannot reproduce the voice, and the state in which the call cannot be made continues.

Therefore, in order to solve the above-mentioned problems, it is an object of the present invention to provide a communication control device and a communication system capable of avoiding waiting for voice reproduction in a terminal.

When the communication control device of the present invention receives a response to an outgoing call from the outgoing terminal from the incoming terminal, the information including the packet transmitted from the incoming terminal is not included in the information contained in the most recently received packet. It includes a generation unit that processes the information into matching information and generates a packet containing the processed information, and a transmission unit that transmits the generated packet to the transmission terminal.

According to the present invention, it is possible to avoid a state of waiting for reproduction by enabling processing based on information processed so as to be inconsistent with the latest packet in the transmitting terminal.

According to the present invention, it is possible to avoid a state of waiting for reproduction in the transmitting terminal.

It is a system block diagram of the communication system in this disclosure. It is a block diagram which shows the functional structure of the telephone GW100. It is a flowchart which shows the operation of the telephone GW100. It is a figure which shows the whole sequence of a communication system. It is a flowchart which shows the operation of a calling terminal 200. , Is a diagram showing an example of a hardware configuration of a telephone GW100 according to an embodiment of the present disclosure.

An embodiment of the present invention will be described with reference to the accompanying drawings. When possible, the same parts are designated by the same reference numerals, and duplicate description is omitted.

FIG. 1 is a system configuration diagram of the communication system in the present disclosure. As shown in the figure, FIG. 1A shows a process when a call is made from the calling terminal 200 toward the receiving terminal 300. FIG. 1B shows a process when the incoming call terminal 300 answers an incoming call and starts a call.

As shown in FIG. 1A, when the calling terminal 200 performs the calling process, the sound source device 400 transmits the RBT (Ringback Tone) packet P1 to the telephone GW 100 until the incoming call terminal 300 answers the incoming call. This RBT packet P1 includes a source SSRC: A indicating the sound source device 400, a sequence number SN: O determined by the sound source device 400, and a time stamp TS: X according to the timer in the sound source device 400.

Then, when the telephone GW100 receives the RBT packet P1, it generates the RBT packet P2. This RBT packet P2 includes a source SSRC: C indicating the telephone GW100 and a sequence number SN: Q independently assigned by the telephone GW100. Further, the time stamp TS is x + α in which a predetermined value α is added to the time stamp T: X included in the RBT packet P2. The telephone GW 100 generates an RBT packet P2 including such a source SSRC, a sequence number SN, and a time stamp TS, and transmits the RBT packet P2 to the transmitting terminal 200.

Then, as shown in FIG. 1 (b), when the incoming call terminal 300 answers the incoming call, the call is started. In FIG. 1B, the incoming terminal 300 transmits the voice packet P3 to the outgoing terminal 200 after answering the incoming call. When the telephone GW100 receives a voice packet P3 indicating normal voice (not RBT) after answering an incoming call, the telephone GW 100 generates a voice packet P4. This voice packet P4 includes Q + 10000, which is obtained by adding a maximum value to the sequence number SN: Q independently assigned by the source SSRC: C indicating the telephone GW100 and the telephone GW100. Here, the maximum value is 10,000. The time stamp TS is Y + α obtained by adding α to the time stamp TS: Y of the voice packet P3.

In this way, the telephone GW100 generates a voice packet P4 including a source SSRC: C, a sequence number CN: Q + 1000, and a time stamp TS: Y + α, and transmits the voice packet P4 to the transmitting terminal 200.

The calling terminal 200 reproduces the voice packet P4 transmitted from the telephone GW 100. The transmitting terminal 200 receives the voice packet P4 after the RBT packet P2. At this time, the transmitting terminal 200 compares the RBT packet P2 and the voice packet P4, and if the source SSRC: C is the same and the sequence number SN is continuous, the time stamp TS is checked and then the voice is heard. Perform playback processing. On the other hand, when the sequence number SN is not continuous or there is a difference of a predetermined value or more, the audio reproduction process is performed without determining the time stamp TS. When the calling terminal 200 is a specific terminal assumed in recent years, when the source SSRC: C is the same and the sequence number SN is continuous, the time stamp TS is determined and then the voice is heard. Perform playback processing. The time stamp TS uses the information of the incoming terminal 300, and it is assumed that such an operation is performed in a recent terminal in order to ensure continuity as a voice packet. Therefore, when the time stamp TS is flying in the future as compared with the latest packet, it may be in a state of waiting for a later voice packet. In the present disclosure, in order to eliminate such a voice packet waiting state, the voice packet is subjected to predetermined processing in the telephone GW100.

The function of the telephone GW100 that operates in this way will be described in detail. FIG. 2 is a block diagram showing a functional configuration of the telephone GW100. As shown in the figure, the telephone GW 100 includes a communication unit 101, an incoming call response determination unit 102, and a packet generation unit 103.

The communication unit 101 is a portion that receives a packet (voice packet or RBT packet) from the incoming terminal 300 or the sound source device 400, and transmits a packet based on the packet to the transmitting terminal 200. In addition, the communication unit 101 performs reception processing of the incoming call answer signal and the like.

The incoming call response determination unit 102 determines that the communication unit 101 has received the incoming call response signal when the communication unit 101 detects the sound source source of the packet transmitted from the incoming terminal 300 and determines that the sound source source has changed. Is.

The packet generation unit 103 is a part that generates a packet based on a packet (voice packet or RBT packet) transmitted from the incoming terminal 300 or the sound source device 400. When the communication unit 101 receives an RBT packet (including the source SSRC, the sequence number SN, and the time stamp TS) from the sound source device 400, the packet generation unit 103 calls the source SSRC for the RBT packet to be transferred to the transmission terminal 200. Information indicating the GW100 is given, and an independently allocated value is given to the sequence number SN. The time stamp TS is a value obtained by adding a predetermined value α to the received RBT packet.

The incoming call response determination unit 102 determines that the communication unit 101 has received the incoming call response signal from the incoming terminal 300, and then when the communication unit 101 receives a new voice packet, the packet generation unit 103 tells the outgoing terminal 200. Information indicating the telephone GW100 is added to the transmission source SSRC to the voice packet to be transferred, and a value obtained by adding a maximum value (for example, 10000) to the value recently assigned as the sequence number is added as the sequence number SN. The time stamp TS is a value obtained by adding a predetermined value α to the received voice packet.

Next, the operation of the telephone GW100 configured in this way will be described. FIG. 3 is a flowchart showing the operation of the telephone GW100.

The communication unit 101 receives a packet (voice packet or RBT packet) from the incoming terminal 300 (S101). Then, when the incoming call response determination unit 102 receives the packet, it detects the change in the sound source transmission source from the SSRC and determines whether or not there is a change (S102). If the sound source transmission source has not been changed (S102: NO), the packet generation unit 103 allocates the sequence number SN again, or sets a predetermined value so that the sequence number SN allocated to the most recently generated packet becomes continuous. Addition (S103) to generate a new packet (RBT putt) (S105). More specifically, the packet generation unit 103 sets the source SSRC to the telephone GW100, allocates the sequence number SN to the telephone GW100 again, or adds a predetermined value (for example, 1) to the sequence number SN of the latest packet. do. Further, the time stamp TS is set to a value based on the time stamp included in the packet (RBT packet) transmitted from the incoming terminal 300, and the packet including them is generated. The packet here is an RBT packet, and the processes of S102 and S103 are repeated until an incoming call response (that is, a change of the sound source transmission source) is made.

Then, the communication unit 101 transmits the RBT packet (RBT packet) to the transmission terminal 200 (S106).

On the other hand, when it is determined that the sound source transmission source has been changed (S102: YES), the packet generation unit 103 generates a voice packet. As described above, the packet generation unit 103 sets the source SSRC to the telephone GW100, assigns a value as the sequence number SN to the sequence number SN used most recently for packet generation by adding the maximum value of 10000, and a time stamp. A packet (here, a voice packet) is generated in which the TS is a value (referred to as + α) based on the time stamp included in the voice packet transmitted from the incoming terminal 300 (S105).

Then, the communication unit 101 transmits a packet (voice packet or TBT offshore packet) to the transmission terminal 200 (S106).

FIG. 4 is a diagram showing the entire sequence of the communication system. The calling terminal 200 performs a calling process to the incoming terminal 300 via the telephone GW 100 (S201). Along with this, the sound source device 400 transmits the RBT packet to the calling terminal 200 via the telephone GW 100 until the incoming terminal 300 answers the incoming call (S202, S203).

The telephone GW 100 generates an RBT packet P2 based on the RBT packet P1 by software (SW) processing, and transmits the RBT packet P2 to the transmitting terminal 200. By the way, in the present disclosure, since the signal transmitted from each device is received according to the change of the credit source, various processes other than the TS granting process are performed by software processing.

When the incoming call answering process is performed (S204), the incoming call terminal 300 transmits an incoming call answering signal to the telephone GW 100 (S205). The incoming call answering determination unit 102 of the telephone GW 100 detects the change of the sound source transmission source and determines the reception of the incoming call answering signal.

Immediately after that, the incoming terminal 300 transmits the voice packet P3 (S206). The telephone GW 100 generates a voice packet P4 based on the voice packet P3 and transmits it to the calling terminal 200 (S207). When the voice packet P4 is generated, the telephone GW 100 uses the sequence number SN of the voice packet P4 as the value obtained by adding the maximum value to the sequence number SN of the RBT packet P2.

As a result, in the transmitting terminal 200, the sequence number SN of the voice packet P4 is larger than the sequence number SN of the recently received RBT packet P2 and becomes discontinuous, so that the voice reproduction is performed without performing the time stamp TS determination process. Processing can be performed.

Here, the operation of the transmission terminal 200 will be described. FIG. 5 is a flowchart showing the operation of the transmission terminal 200. When the transmitting terminal 200 receives a packet (voice packet or RBT packet), it determines whether or not it matches the source SSRC of the most recently received packet (S301). If it is determined that they match, then it is determined whether or not the sequence number SN of the received packet has continuity with the sequence number SN of the latest packet (S302). Then, when it is determined that there is continuity, the transmitting terminal 200 determines whether or not the time stamp TS has continuity with the time stamp TS of the most recently received packet (S303). In the determination of continuity, even if the sequence number SN flies within a predetermined value in consideration of packet loss, it may be determined to be continuous. In the present disclosure, the predetermined value is 5000.

When the transmitting terminal 200 determines that the time stamp TS is smaller than the time stamp TS of the latest packet or is continuous, it performs voice reproduction processing by RTP reproduction (S304, S305). When the time stamp TS is smaller than the latest packet, it may occur when the receiving order of the packets has changed due to network delay or the like. In this case, the transmitting terminal 200 performs a voice reproduction process ignoring this packet.

When the transmitting terminal 200 determines that the time stamp TS is larger than the time stamp TS of the latest packet, it performs MUTE processing and waits for the reproduction of the subsequent voice packet (S306). Even if the time stamp TS is larger than the latest packet, it may occur when the reception order of the packets has changed due to network delay or the like. In this case, since the deviation of the time stamp TS is small and the playback waiting time is short, the caller does not recognize that the call cannot be made.

In the present disclosure, the calling terminal 200 skips the time stamp TS determination process (S303) so that the MUTE state in step S306 does not become long after answering the incoming call. Therefore, the calling terminal 200 processes the sequence number SN in the telephone GW 100 so as to determine that the sequence number SN is discontinuous (or a predetermined difference value). That is, the sequence number SN is processed so that the difference value thereof from the sequence number SN of the most recently received packet is equal to or more than a predetermined value (for example, 5000 or more).

When the transmitting terminal 200 determines that the difference value is equal to or greater than a predetermined value, the transmitting terminal 200 resets the time stamp TS (S307) and performs voice reproduction processing by RTP reproduction (S308). This makes it possible to avoid waiting for voice reproduction after answering an incoming call. The RFC3550 stipulates that the sequence number SN is increased by one, but if it does not increase monotonically, there is a stipulation that packet loss is detected and the packet sequence is recovered. By complying with the provisions of RFC3550, the transmitting terminal 200 in the present disclosure enables the reproduction processing of the voice packet when the time stamp TS is reset.

Next, the action and effect of the telephone GW100 in the present disclosure will be described. This telephone GW100 is a so-called communication control device. When the incoming call response signal for an outgoing call from the outgoing call terminal 200 is received from the incoming call terminal 300, the telephone GW 100 immediately receives management information (sequence number SN in the present disclosure) including a packet transmitted from the incoming call terminal 300. With the packet generation unit 103, which processes the management information (sequence number SN) included in the received packet into management information that is inconsistent (discontinuous here) and generates a processed packet including the processed management information. , A communication unit 101 for transmitting the generated packet to the transmitting terminal 200.

According to this configuration, the information contained in the packet is made inconsistent with the information of the latest packet, so that the transmitting terminal 200 can perform a specific operation. In recent communication terminals, it is assumed that the time stamp TS is checked in addition to the sequence number SN check in voice reproduction. This seems to be a specification that takes packet loss into consideration. In this case, as described above, the communication terminal may wait for a later packet, and the voice call may be interrupted for a long time. Therefore, when the communication terminal becomes the transmission terminal 200, by skipping the check of the time stamp TS and the like, it is possible to avoid the interruption of the voice call due to the check of the time stamp TS.

In the present disclosure, the packet generation unit 103 processes the sequence number as the information contained in the packet into a sequence number having a predetermined difference from the sequence number included in the most recently received packet to generate the packet. do.

Specifically, the packet generation unit 103 can process a sequence number having the predetermined difference by adding a number having a predetermined value or more to the latest sequence number.

The RFC3550 stipulates that by checking the sequence number SN, the transmitting terminal 200 performs a reset process of the time stamp TS, which is a so-called error process. By utilizing this, it is possible to avoid a call interruption caused by waiting for voice reproduction caused by checking the time stamp TS.

In RFC, the sequence number SN is seen, but it is assumed that the sequence number SN is not limited to this in the future. The other information contained in the packet is not limited to the information as long as it is inconsistent by comparing with other information of the latest packet.

Further, in the above-mentioned disclosure, the time of incoming call response processing has been described as an example, but the present invention is not limited to this, and the addition of management information such as the sequence number SN and the time stamp TS is performed by a device different from the source terminal. Similar processing can be applied at the time of processing.

That is, when the packet generation unit 103 receives a response to an outgoing call from the outgoing terminal 200 from the incoming terminal 300, the packet generation unit 103 generates a forwarding packet for the packet received after the response, and until the response is received from the incoming terminal 300. , The sequence number SN for transfer that maintains consistency with the sequence number SN included in the latest received packet is processed, but the present invention is not limited to this. The processing of the present disclosure is applicable even when the source is switched after the incoming call is answered.

The block diagram used in the description of the above embodiment shows a block of functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Further, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized using one physically or logically coupled device, or two or more physically or logically separated devices can be directly or indirectly (eg, for example). , Wired, wireless, etc.) and may be realized using these plurality of devices. The functional block may be realized by combining the software with the one device or the plurality of devices.

Functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, and assumption. There are broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but only these. I can't. For example, a functional block (component) that makes transmission function is called a transmitting unit or a transmitter. In each case, as described above, the realization method is not particularly limited.

For example, the telephone GW 100 in one embodiment of the present disclosure may function as a computer that processes the communication method of the present disclosure. FIG. 6 is a diagram showing an example of the hardware configuration of the telephone GW100 according to the embodiment of the present disclosure. The above-mentioned telephone GW 100 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

In the following description, the word "device" can be read as a circuit, a device, a unit, or the like. The hardware configuration of the telephone GW 100 may be configured to include one or more of the devices shown in the figure, or may be configured not to include some of the devices.

For each function in the telephone GW 100, by loading predetermined software (program) on hardware such as the processor 1001 and the memory 1002, the processor 1001 performs an calculation, controls communication by the communication device 1004, and the memory 1002. And by controlling at least one of reading and writing of data in the storage 1003.

Processor 1001 operates, for example, an operating system to control the entire computer. The processor 1001 may be configured by a central processing unit (CPU) including an interface with a peripheral device, a control device, an arithmetic unit, a register, and the like. For example, the above-mentioned incoming call response determination unit 102, packet generation unit 103, and the like may be realized by the processor 1001.

Further, the processor 1001 reads a program (program code), a software module, data, and the like from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to these. As the program, a program that causes a computer to execute at least a part of the operations described in the above-described embodiment is used. For example, the incoming call response determination unit 102 and the packet generation unit 103 may be realized by a control program stored in the memory 1002 and operating in the processor 1001, and may be realized in the same manner for other functional blocks. Although it has been described that the various processes described above are executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001. Processor 1001 may be mounted by one or more chips. The program may be transmitted from the network via a telecommunication line.

The memory 1002 is a computer-readable recording medium, and is composed of at least one such as a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), and a RAM (Random Access Memory). May be done. The memory 1002 may be referred to as a register, a cache, a main memory (main storage device), or the like. The memory 1002 can store a program (program code), a software module, or the like that can be executed to implement the communication method according to the embodiment of the present disclosure.

The storage 1003 is a computer-readable recording medium, for example, an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, an optical magnetic disk (for example, a compact disk, a digital versatile disk, a Blu-ray). It may consist of at least one (registered trademark) disk), smart card, flash memory (eg, card, stick, key drive), floppy (registered trademark) disk, magnetic strip, and the like. The storage 1003 may be referred to as an auxiliary storage device. The storage medium described above may be, for example, a database, server or other suitable medium containing at least one of the memory 1002 and the storage 1003.

The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, or the like. The communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, and the like in order to realize at least one of FDD (Frequency Division Duplex) and Time Division Duplex (TDD). It may be composed of. For example, the above-mentioned communication unit 101 and the like may be realized by the communication device 1004. The communication unit 101 may be physically or logically separated from the transmission unit and the reception unit.

The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives an input from the outside. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that outputs to the outside. The input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).

Further, each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured by using a single bus, or may be configured by using a different bus for each device.

Further, the GW100 for telephone includes hardware such as a microprocessor, a digital signal processor (DSP: Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array). It may be configured, and some or all of each functional block may be realized by the hardware. For example, processor 1001 may be implemented using at least one of these hardware.

The notification of information is not limited to the embodiments / embodiments described in the present disclosure, and may be performed by other methods. For example, information notification includes physical layer signaling (eg, DCI (Downlink Control Information), UCI (Uplink Control Information)), higher layer signaling (eg, RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, etc. It may be carried out by broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination thereof. Further, the RRC signaling may be referred to as an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like.

Each aspect / embodiment described in the present disclosure includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), and 5G (5th generation mobile communication). system), FRA (Future Radio Access), NR (new Radio), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)) )), LTE 802.16 (WiMAX®), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth®, and other systems that utilize and extend based on these. It may be applied to at least one of the next generation systems. Further, a plurality of systems may be applied in combination (for example, a combination of at least one of LTE and LTE-A and 5G).

The order of the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in the present disclosure may be changed as long as there is no contradiction. For example, the methods described in the present disclosure present elements of various steps using exemplary order, and are not limited to the particular order presented.

In some cases, the specific operation performed by the base station in the present disclosure may be performed by its upper node. In a network consisting of one or more network nodes having a base station, various operations performed for communication with the terminal are the base station and other network nodes other than the base station (eg, MME or). It is clear that it can be done by at least one of (but not limited to, S-GW, etc.). Although the case where there is one network node other than the base station is illustrated above, it may be a combination of a plurality of other network nodes (for example, MME and S-GW).

Information and the like can be output from the upper layer (or lower layer) to the lower layer (or upper layer). Input / output may be performed via a plurality of network nodes.

The input / output information and the like may be stored in a specific place (for example, a memory), or may be managed using a management table. Information to be input / output may be overwritten, updated, or added. The output information and the like may be deleted. The input information or the like may be transmitted to another device.

The determination may be made by a value represented by 1 bit (0 or 1), by a boolean value (Boolean: true or false), or by comparing numerical values (for example, a predetermined value). It may be done by comparison with the value).

Each aspect / embodiment described in the present disclosure may be used alone, in combination, or may be switched and used according to the execution. Further, the notification of predetermined information (for example, the notification of "being X") is not limited to the explicit one, but is performed implicitly (for example, the notification of the predetermined information is not performed). May be good.

Although the present disclosure has been described in detail above, it is clear to those skilled in the art that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure may be implemented as amendments and modifications without departing from the spirit and scope of the present disclosure as determined by the description of the scope of claims. Therefore, the description of this disclosure is for purposes of illustration and does not have any limiting meaning to this disclosure.

Software, whether called software, firmware, middleware, microcode, hardware description language, or other names, is an instruction, instruction set, code, code segment, program code, program, subprogram, software module. , Applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, features, etc. should be broadly interpreted.

Further, software, instructions, information and the like may be transmitted and received via a transmission medium. For example, a website that uses at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and wireless technology (infrared, microwave, etc.). When transmitted from a server or other remote source, at least one of these wired and wireless technologies is included within the definition of transmission medium.

The information, signals, etc. described in the present disclosure may be represented using any of a variety of different techniques. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may be represented by a combination of.

The terms described in the present disclosure and the terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may be a signal (signaling). Also, the signal may be a message. Further, the component carrier (CC: Component Carrier) may be referred to as a carrier frequency, a cell, a frequency carrier, or the like.

The terms "system" and "network" used in this disclosure are used interchangeably.

Further, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, relative values from predetermined values, or using other corresponding information. It may be represented. For example, the radio resource may be one indicated by an index.

The names used for the parameters mentioned above are not limited in any respect.

In the present disclosure, terms such as "mobile station (MS)", "user terminal", "user equipment (UE)", and "terminal" may be used interchangeably. ..

Mobile stations can be used by those skilled in the art as subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless. It may also be referred to as a terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.

The terms "determining" and "determining" used in this disclosure may include a wide variety of actions. "Judgment" and "decision" are, for example, judgment, calculation, computing, processing, deriving, investigating, looking up, search, inquiry. It may include (eg, searching in a table, database or another data structure), ascertaining as "judgment" or "decision". Also, "judgment" and "decision" are receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access. It may include (for example, accessing data in memory) to be regarded as "judgment" or "decision". In addition, "judgment" and "decision" are considered to be "judgment" and "decision" when the things such as solving, selecting, choosing, establishing, and comparing are regarded as "judgment" and "decision". Can include. That is, "judgment" and "decision" may include considering some action as "judgment" and "decision". Further, "judgment (decision)" may be read as "assuming", "expecting", "considering" and the like.

The terms "connected", "coupled", or any variation thereof, mean any direct or indirect connection or connection between two or more elements and each other. It can include the presence of one or more intermediate elements between two "connected" or "combined" elements. The connection or connection between the elements may be physical, logical, or a combination thereof. For example, "connection" may be read as "access". As used in the present disclosure, the two elements use at least one of one or more wires, cables and printed electrical connections, and as some non-limiting and non-comprehensive examples, the radio frequency domain. Can be considered to be "connected" or "coupled" to each other using electromagnetic energy having wavelengths in the microwave and light (both visible and invisible) regions.

The phrase "based on" as used in this disclosure does not mean "based on" unless otherwise stated. In other words, the statement "based on" means both "based only" and "at least based on".

When "include", "including" and variations thereof are used in the present disclosure, these terms are as inclusive as the term "comprising". Is intended. Moreover, the term "or" used in the present disclosure is intended not to be an exclusive OR.

In the present disclosure, if articles are added by translation, for example a, an and the in English, the disclosure may include the plural nouns following these articles.

In the present disclosure, the term "A and B are different" may mean "A and B are different from each other". The term may mean that "A and B are different from C". Terms such as "separate" and "combined" may be interpreted in the same way as "different".

101 ... communication unit, 102 ... incoming call response determination unit, 103 ... packet generation unit.

Claims (7)

The information contained in the packet transmitted from the terminal is processed into management information that is inconsistent with the management information contained in the latest received packet, and a transfer packet containing the processed management information is generated. With the generator
A transmission unit that transmits the generated transfer packet to a terminal that is a communication partner of the terminal, and a transmission unit.
A communication control device. When the generation unit receives a response to an outgoing call from the outgoing terminal from the incoming terminal, the generator generates the forwarded packet for the packet received after the response.
The communication control device according to claim 1. The generation unit processes the management information that maintains consistency with the management information included in the most recently received packet until the response to the transmission from the transmission terminal is received from the incoming terminal.
The communication control device according to claim 2. The management information is determined to be consistent with the management information included in the latest packet at the terminal to be the communication partner.
The communication control device according to any one of claims 1 to 3. The generator is
The sequence number corresponding to the management information included in the packet is processed into a transfer sequence number having a predetermined difference from the sequence number included in the latest packet to generate a transfer packet.
The communication control device according to any one of claims 1 to 4. The generator is
By adding a number equal to or greater than a predetermined value to the sequence number of the latest packet, the sequence number is processed into a transfer sequence number having the predetermined difference.
The communication control device according to claim 5. In a communication system including a calling terminal, an incoming terminal, and a communication control device according to any one of claims 1 to 6.
The calling terminal is
If it is determined that the received packet contains inconsistent information as compared with the latest received packet, the voice reproduction process is performed without performing any other determination process.
Communications system.

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