WO2019167349A1

WO2019167349A1 - Communication device and communication method

Info

Publication number: WO2019167349A1
Application number: PCT/JP2018/041228
Authority: WO
Inventors: 哲也矢端; 裕才石飛
Original assignee: アルプスアルパイン株式会社
Priority date: 2018-02-28
Filing date: 2018-11-06
Publication date: 2019-09-06
Also published as: JP2021068924A

Abstract

The communication device according to one embodiment of the present invention is provided with: a first communication circuit that executes a first communication operation on the basis of a first wireless communication standard; a second communication circuit that executes a second communication operation on the basis of a second wireless communication standard; and a control circuit that controls the first communication operation and the second communication operation. In the first communication operation, the first communication circuit can execute a specific communication operation for which a real-time property is demanded. When a coexistence operation of the first communication operation and the second communication operation is executed, the control circuit changes time allocation for the first communication operation and the second communication operation on the basis of the presence/absence of the specific communication operation in the first communication operation, and changes a data transfer standard in the second communication operation, according to the change of the time allocation.

Description

Communication apparatus and communication method

The present invention relates to a communication device and a communication method.

In recent years, by alternately executing a first communication operation based on the first wireless communication standard and a second communication operation based on a second wireless communication standard different from the first wireless communication standard on a time division basis, A technology relating to a communication operation in which two types of communication operations coexist (hereinafter sometimes referred to as “coexistence operation”) has been put into practical use. By using this technology, for example, stream distribution according to the first wireless communication standard (a data transmission / reception method that sequentially reproduces transmitted audio data and moving image data in real time), real-time performance corresponding to voice calls, and the like are required. Specific communication operation (hereinafter, also referred to as “real-time operation”) and normal operation for performing normal data transmission / reception other than stream distribution and voice call according to the second wireless communication standard are executed simultaneously. be able to.

Special table 2010-535461

However, in the conventional communication method, when the coexistence operation of the first communication operation and the second communication operation is executed, compared with the case where the first communication operation or the second communication operation is executed alone, Since the execution period of each communication operation is limited, sufficient time cannot be secured in each communication operation, and packet loss may occur. In particular, when the first communication operation is a real-time operation corresponding to stream delivery or voice call, packet loss causes sound skipping, and the problem becomes more prominent. In such a case, the packet loss in the first communication operation can be reduced by changing the time distribution between the first communication operation and the second communication operation and extending the execution period of the first communication operation. Although it can be reduced, the execution period of the second communication operation is shortened, and depending on the communication load in the second communication operation, a communication failure may occur in the second communication operation.

The present invention has been made in view of the above problems, and when performing the coexistence operation of the first communication operation and the second communication operation, the packet loss in the first communication operation is reduced, and An object is to suppress the occurrence of a communication failure in the second communication operation.

A communication apparatus according to an embodiment includes a first communication circuit that executes a first communication operation according to a first wireless communication standard, and a second wireless communication standard that differs from the first wireless communication standard. A second communication circuit that executes a communication operation; and a control circuit that controls the first communication operation and the second communication operation, wherein the first communication circuit is real-time in the first communication operation. The control circuit is capable of executing a coexistence operation in which the first communication operation and the second communication operation are alternately performed in a time division manner. And the second communication circuit, and when performing the coexistence operation, the first communication operation and the second communication operation are performed based on the presence or absence of the specific communication operation in the first communication operation. Change the time allocation with the communication operation Both in accordance with the change of the time allocation, changing the transfer standards of data in said second communication operation.

According to each embodiment of the present invention, when performing the coexistence operation of the first communication operation and the second communication operation, the packet loss in the first communication operation is reduced, and the second communication operation is performed. It is possible to suppress the occurrence of communication failure in

The figure which shows an example of the hardware constitutions of a communication apparatus. The timing chart which shows an example of normal operation | movement of a communication apparatus. The flowchart which shows an example of the normal operation | movement for 1 period of a communication apparatus. The timing chart which shows an example of the real-time operation | movement of a communication apparatus. The flowchart which shows an example of the operation | movement at the time of operation | movement switching of a communication apparatus. The table | surface which shows the parameter of 1st communication operation and 2nd communication operation for every operation state. The flowchart which shows an example of the operation | movement at the time of operation | movement switching of a communication apparatus. The table | surface which shows the parameter of 1st communication operation and 2nd communication operation for every operation state.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In addition, regarding the description of the specification and the drawings according to each embodiment, constituent elements having substantially the same functional configuration are denoted by the same reference numerals and overlapping description is omitted.

<First Embodiment>
A communication device 1 according to the first embodiment will be described with reference to FIGS. The communication device 1 according to the present embodiment is a communication device that can alternately execute a communication operation based on the first wireless communication standard and a communication operation based on the second wireless communication standard in a time division manner.

First, the hardware configuration of the communication device 1 will be described. FIG. 1 is a diagram illustrating an example of a hardware configuration of the communication device 1. The communication device 1 in FIG. 1 includes a first communication circuit 11, a second communication circuit 12, a control circuit 13, an antenna 14, and a switch circuit 15.

The first communication circuit 11 is a circuit that executes a communication operation with the opposite terminal 2 that is a communication partner in accordance with the first wireless communication standard. A communication operation performed by the first communication circuit 11 is referred to as a first communication operation. The first wireless communication standard may be any wireless communication standard capable of executing a real-time operation (a specific communication operation that requires real-time performance corresponding to stream delivery or voice call). The first wireless communication standard is, for example, Bluetooth (registered trademark), Wi-Fi (registered trademark), WiMAX (registered trademark), or LTE, but is not limited thereto. Further, the opposite terminal 2 can be any communication device capable of communicating according to the first wireless communication standard.

The second communication circuit 12 is a circuit that executes a communication operation with the opposite terminal 3 that is a communication partner in accordance with the second wireless communication standard. The communication operation performed by the second communication circuit 12 is referred to as a second communication operation. The second wireless communication standard can be any wireless communication standard different from the first wireless communication standard. The second wireless communication standard is, for example, Bluetooth, Wi-Fi, or WiMAX, but is not limited thereto. Further, the opposite terminal 3 can be any communication device capable of communicating according to the second wireless communication standard.

The control circuit 13 is a circuit that controls the first communication operation by the first communication circuit 11 and the second communication operation by the second communication circuit 12, respectively. The control circuit 13 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), a connection interface for connecting to the first communication circuit 11 and the second communication circuit 12, and a flash memory. An auxiliary storage device is provided. The function of the control circuit 13 is realized by the CPU executing a program stored in the ROM or the like on the RAM. The operation of the control circuit 13 will be described later.

The antenna 14 is connected to the first communication circuit 11 or the second communication circuit 12 via the switch circuit 15, and transmits and receives radio signals. That is, the antenna 14 is shared by the first communication circuit 11 and the second communication circuit 12.

The switch circuit 15 connects the antenna 14 to the first communication circuit 11 or the second communication circuit 12. Switching of connection by the switch circuit 15 is controlled by the control circuit 13.

Note that the hardware configuration of the communication device 1 is not limited to the example of FIG. For example, in the example of FIG. 1, it is assumed that the first communication circuit 11 and the second communication circuit 12 are independent communication modules, but the first communication circuit 11 and the second communication circuit 12 are integrated. It may be a communication module. The first communication circuit 11 and the second communication circuit 12 may be communication circuits such as cognitive radio whose functions are defined by software. In the example of FIG. 1, it is assumed that the first communication circuit 11 and the second communication circuit 12 are controlled by one control circuit 13, but the first communication circuit 11 and the second communication circuit 12 are The functions of the control circuit 13 may be realized by being controlled by two independent control circuits and by the cooperation of the two control circuits.

Next, normal operation and real-time operation of the communication device 1 will be described. In the following description, the real-time operation refers to a specific communication operation that is executed in the first communication operation and requires real-time performance corresponding to stream delivery or voice call. In the following description, the normal operation is a communication operation other than the above-described specific communication operation that is executed in the first communication operation. Scanning operations using, reception of ACK corresponding to transmitted data, return of ACK corresponding to received data, and the like. Hereinafter, the first wireless communication standard is assumed to be a wireless LAN standard such as Wi-Fi, and the second wireless communication standard is assumed to be Bluetooth. Hereinafter, the first communication operation may be referred to as “WLAN” and the second communication operation may be referred to as “BT”.

First, the normal operation of the communication device 1 will be described. FIG. 2 is a timing chart illustrating an example of a communication operation of the communication device 1 when the first communication operation is a normal operation.

As shown in FIG. 2, the communication device 1 can perform a coexistence operation in which a first communication operation (WLAN) and a second communication operation (BT) are alternately performed in a time division during a period T. . In the example of FIG. 2, the first communication operation is performed prior to the second communication operation, but the order may be reversed.

The first communication operation and the second communication operation are executed during the execution periods T1 and T2 set by the control circuit 13, respectively. In the execution periods T1 and T2, default values are set in advance, and are set to default values in the initial state and normal operation. In the example of FIG. 2, it is assumed that the default values of the execution periods T1 and T2 are equal, but the default values of the execution periods T1 and T2 are not limited to this.

The data transfer standard for transmitting and receiving data in the first communication operation (hereinafter also referred to as “data transfer standard in the first communication operation”) is the first communication circuit 11 and the opposite terminal 2. Is determined as one of the transfer standards supported by the first communication circuit 11 and the opposite terminal 2. The data transfer standard includes a link format for transmitting / receiving data in the first communication operation, a packet type for packetizing data in the first communication operation, and a data format for transmitting / receiving in the first communication operation. And at least one of the forms.

Similarly, the data transfer standard for transmitting and receiving data in the second communication operation (hereinafter sometimes referred to as “data transfer standard in the second communication operation”) is the second communication circuit 12 and the opposite terminal. 3 is determined as one of the transfer standards supported by the second communication circuit 12 and the opposite terminal 3. The data transfer standard includes a link format for transmitting / receiving data in the second communication operation, a packet type for packetizing data in the second communication operation, and a data format for transmitting / receiving in the second communication operation. And at least one of the forms.

The link formats that can be used when the second wireless communication standard is BT include ACL, SCO, eSCO, and the like. ACL is a link format compatible with normal data transmission / reception, and SCO and eSCO are link formats compatible with real-time operation. The packet types that can be used when the link format is ACL include DM1, DM2, DM3, and the like. Packet types that can be used when the link format is SCO include HV1, HV2, and HV3. Packet types that can be used when the link format is eSCO include EV3, 2-EV3, and 3-EV3. In addition, there are SBC, MP3, AAC, ATRAC, and the like as data format formats that can be used for transmission / reception of audio data when the second wireless communication standard is BT, and the required data rate differs for each format format. . The control circuit 13 sets a link format, a packet type, and a format format to be used by transmitting a predetermined setting request (in the case of BT, an LMP SCO link req command or an AVDTP Set Configuration command) to the opposite terminal 3. Can do. Usually, the data transfer occupation time in the second communication operation differs depending on the link format, packet type, and format format to be used. In general, the data transfer occupation time in the second communication operation is likely to be longer as the data transfer is of higher quality (in the case of audio data, higher sound quality).

FIG. 3 is a flowchart illustrating an example of the coexistence operation for one cycle of the communication device 1 when the first communication operation is a normal operation. It is assumed that the second communication operation is being executed at the start of FIG.

The control circuit 13 controls the second communication operation until the start time of the first communication operation arrives (step S101: NO). When the start time of the first communication operation arrives (YES in step S101), the control circuit 13 causes the second communication circuit 12 to stop the second communication operation (step S102) and controls the switch circuit 15, The antenna 14 is connected to the first communication circuit 11 (step S103), and the first communication circuit 11 is caused to start the first communication operation (step S104). At this time, the control circuit 13 sets the execution period T1 (execution period of the first communication operation) to a default value. Thereafter, the first communication circuit 11 performs the first communication operation during the execution period T1. Specifically, the first communication circuit 11 transmits data input from the control circuit 13 wirelessly via the antenna 14 and inputs data received wirelessly via the antenna 14 to the control circuit 13. . Data transmission / reception between the first communication circuit 11 and the opposite terminal 2 is performed in accordance with a transfer standard determined by negotiation.

Thereafter, the control circuit 13 controls the first communication operation until the start time of the second communication operation arrives (step S105: NO). When the start time of the second communication operation arrives (YES in step S105), the control circuit 13 causes the first communication circuit 11 to stop the first communication operation (step S106) and controls the switch circuit 15, The antenna 14 is connected to the second communication circuit 12 (step S107), and the second communication circuit 12 is caused to start the second communication operation (step S108). At this time, the control circuit 13 sets the execution period T2 (execution period of the second communication operation) to a default value. Thereafter, the second communication circuit 12 executes the second communication operation by Wi-Fi during the execution period T2. Specifically, the second communication circuit 12 transmits the data input from the control circuit 13 wirelessly via the antenna 14 and inputs the data received wirelessly via the antenna 14 to the control circuit 13. To do. Data transmission / reception between the second communication circuit 12 and the opposite terminal 3 is performed according to a transfer standard determined by negotiation. When the coexistence operation is continued, a series of operations from step S101 to step S108 are repeated.

Next, the real-time operation of the communication device 1 will be described. FIG. 4 is a timing chart showing an example of the communication operation of the communication device 1 when the real-time operation is executed in the first communication operation. Hereinafter, it is assumed that the real-time operation of the communication device 1 is a communication operation corresponding to stream delivery or voice call.

As shown in FIG. 4, when the real-time operation is executed in the first communication operation, the execution period T1 is set longer than the default value. As a result, the execution period of the real-time operation in the first communication operation can be secured longer than that in the normal operation, thereby reducing packet loss and suppressing sound skipping in stream delivery or voice call by the first communication operation. can do.

On the other hand, since the period T of the normal operation and the real-time operation is the same, the execution period T2 is set shorter than the default value in the real-time operation. That is, in the real-time operation, the ratio of the execution period T1 to the execution period T2 is larger than the initial state (ratio when the execution periods T1 and T2 are default values), and the ratio of the execution period T2 to the execution period T1 is higher than the initial state. The time distribution (time distribution between the first communication operation and the second communication operation) of the execution periods T1 and T2 is set so as to decrease. As a result, the operations that can be executed in the execution period T2 are limited, and depending on the communication load in the second communication operation, a communication failure may occur in the second communication operation.

Therefore, in the present embodiment, when executing the coexistence operation, the control circuit 13 changes the time distribution of the execution periods T1 and T2 based on the presence or absence of the real-time operation in the first communication operation, and also executes the execution period T1. , T2 to change the data transfer standard in the second communication operation in accordance with the change in the time distribution of T2. Specifically, as in the setting example illustrated in FIG. 6, the control circuit 13 performs data transfer in the second communication operation in accordance with the decrease in the execution period T2 accompanying the change in the time distribution of the execution periods T1 and T2. The data transfer standard in the second communication operation is changed so as to shorten the occupation time, thereby suppressing the occurrence of communication failure due to the decrease in the execution period T2.

Note that the real-time operation of the communication device 1 is the same as the normal operation except for the set values of the execution periods T1 and T2 and the parameters of the first communication operation and the second communication operation, and thus description thereof is omitted.

Subsequently, the operation at the time of switching the operation of the communication device 1 (when switching between the normal operation and the real-time operation) will be described. FIG. 5 is a flowchart illustrating an example of an operation when the operation of the communication apparatus 1 is switched. It is assumed that the normal operation is being executed at the start of FIG.

When the real-time operation starts in the first communication operation (WLAN) (step S201: YES), the control circuit 13 initializes the time distribution of the execution periods T1 and T2 in accordance with the start of the real-time operation in the first communication operation. The state is changed (step S203). Next, the data transfer standard in the second communication operation is changed from the initial state in accordance with the change in the time distribution between the execution periods T1 and T2 (step S204).

The time distribution of the execution periods T1 and T2 and the data transfer standard in the second communication operation are set according to a setting example as shown in FIG. 6, for example. FIG. 6 shows each operation state when the operation state when the real-time operation is not executed in the first communication operation is the initial state, and the operation state when the real-time operation is executed in the first communication operation is the state 1. The example of the parameter setting in is shown.

In the setting example shown in FIG. 6, T1: T2, which is an index indicating the ratio of the execution period T1 to the execution period T2, is 5: 5 in the initial state and 8: 2 in the state 1. That is, in the setting example shown in FIG. 6, the control circuit 13 executes the execution period so that the ratio of the execution period T1 to the execution period T2 is longer than the initial state in accordance with the start of the real-time operation in the first communication operation. The time distribution of T1 and T2 is changed.

In the setting example shown in FIG. 6, the data transfer in the second communication operation is performed so that the data transfer occupation time in the second communication operation in the state 1 is shortened in the initial state and is long in the state 1. A standard is set. In other words, in the setting example shown in FIG. 6, the control circuit 13 makes the data transfer occupation time in the second communication operation shorter than the initial state in accordance with the change in the time distribution of the execution periods T1 and T2 as described above. As described above, the data transfer standard in the second communication operation is changed. As a method for changing the data transfer standard in the second communication operation, for example, there are the following methods.

The link format that can be used when the second wireless communication standard is BT and audio data is transmitted and received in the second communication operation includes SCO and eSCO. eSCO is a link format corresponding to voice data with higher sound quality than SCO. In general, the occupation time of data transfer in the execution period T2 tends to increase in the order of SCO and eSCO. Therefore, for example, when the link format used in the initial state in the second communication operation is eSCO, by changing the link format used from eSCO to SCO, the occupation time of data transfer in the execution period T2 is increased. It can be shortened.

Also, packet types that can be used when the second wireless communication standard is BT and the link format to be used is SCO include HV1, HV2, HV3, and the like. In general, the required data rate increases in the order of HV1, HV2, and HV3, and the occupation time of data transfer in the execution period T2 tends to increase. Therefore, for example, when the packet type used in the initial state in the second communication operation is HV3, the occupied time for data transfer in the execution period T2 is changed by changing the packet type to be used to HV2 or HV1. It can be shortened.

Also, the second wireless communication standard is BT, and the data format that can be used when audio data is transmitted / received includes SBC, MP3, AAC, ATRAC, and the like. The required data rate differs depending on which format format is selected. Therefore, by selecting a format format with a lower data rate, it is possible to reduce the data transfer occupation time in the execution period T2. However, these methods are examples of a method for changing the data transfer standard in the second communication operation, and do not limit the method for changing the data transfer standard in the second communication operation.

Thus, the parameters of the first communication operation and the second communication operation are set, and the real-time operation is started in the first communication operation. Thereafter, the communication device 1 continues the real-time operation in the first communication operation until the stream distribution or the voice call is finished (step S204: NO).

When the real-time operation ends in the first communication operation (step S204: YES), the control circuit 13 returns the setting to the initial state (step S205). That is, the control circuit 13 returns the settings of the execution periods T1 and T2 and the data transfer standard in the second communication operation to the initial state (default value). Then, normal operation is started. Thereafter, the communication device 1 continues normal operation until real-time operation is started again.

As described above, according to the present embodiment, the control circuit 13 performs the real-time operation (specific communication) in the first communication operation when executing the coexistence operation of the first communication operation and the second communication operation. The time distribution of the execution periods T1 and T2 (time distribution between the first communication operation and the second communication operation) is changed based on the presence / absence of the operation) and the time distribution of the execution periods T1 and T2 is changed. Thus, the data transfer standard in the second communication operation is changed. Thereby, the time distribution of the execution periods T1 and T2 can be optimized based on the presence or absence of the real-time operation, and the packet loss in the first communication operation is reduced by the optimization of the time distribution of the execution periods T1 and T2. can do. In addition, by changing the data transfer standard in the second communication operation, the communication load in the second communication operation can be optimized in accordance with the change in the time distribution of the execution periods T1 and T2. By optimizing the communication load in the communication operation, the occurrence of communication failure in the second communication operation can be suppressed.

Further, according to the present embodiment, the real-time operation that is a specific communication operation is a communication operation corresponding to stream delivery or voice call. In stream delivery or voice call, packet loss causes skipping, so real-time performance is particularly severe from the viewpoint of preventing skipping. For this reason, when the real-time operation is a communication operation corresponding to stream delivery or voice call, the above-described effects are particularly remarkable.

Further, according to the present embodiment, the control circuit 13 executes the execution period T1 such that the ratio of the execution period T1 to the execution period T2 is longer than the initial state in accordance with the start of the real-time operation in the first communication operation. , T2 time distribution is changed. Thereby, it becomes easy to secure the time required for the real-time operation, and the packet loss in the first communication operation can be easily reduced. In addition, the control circuit 13 adjusts the second communication so that the data transfer occupation time in the second communication operation becomes shorter than the initial state in accordance with the change in the time distribution of the execution periods T1 and T2. Change the data transfer standard in operation. As a result, the data transfer occupancy time in the second communication operation can be shortened in accordance with the decrease in the execution period T2 accompanying the change in the time distribution of the execution periods T1 and T2, and the occurrence of a communication failure in the second communication operation can be reduced. It can be easily suppressed. The control circuit 13 returns the time distribution of the execution periods T1 and T2 and the data transfer standard in the second communication operation to the initial state in accordance with the end of the real-time operation in the first communication operation. Thereby, the period during which the throughput of the second communication operation is reduced can be limited to the period in which the real-time operation is executed in the first communication operation, and communication can be performed efficiently.

In addition, according to the present embodiment, the data transfer standard in the second communication operation includes the link format used when data is transmitted / received in the second communication operation, and the data transfer packetized in the second communication operation. It includes at least one of a packet type and a format format of data transmitted and received in the second communication operation. Then, by selecting one of a plurality of link formats having different data transfer occupation times in the execution period T2, the data transfer occupation time in the execution period T2 can be easily changed. Further, by selecting one of a plurality of packet types having different required data rates, the data transfer occupation time in the execution period T2 can be easily changed. Further, by selecting one of a plurality of format formats having different required data rates, the occupation time of data transfer in the execution period T2 can be easily changed.

<Second Embodiment>
A communication device 1 according to the second embodiment will be described with reference to FIGS. In the present embodiment, the control circuit 13 of the communication device 1 changes the time distribution of the execution periods T1 and T2 when executing the real-time operation based on the communication load in the second communication operation in two stages, The data transfer standard in the first communication operation and the data transfer standard in the second communication operation when the real-time operation is executed in accordance with the change in the time distribution of the execution periods T1 and T2, respectively. To change. Note that the hardware configuration, normal operation, and real-time operation of the communication device 1 are the same as those in the first embodiment, and thus description thereof is omitted.

Hereinafter, the operation at the time of operation switching of the communication device 1 in the present embodiment will be described. FIG. 7 is a flowchart illustrating an example of an operation at the time of switching the operation of the communication device 1. The flowchart of FIG. 7 is obtained by adding the step of checking the communication load in the second communication operation (BT) and the step of changing the data transfer standard in the first communication operation to the flowchart of FIG. Equivalent to. It is assumed that the normal operation is being executed at the start of FIG.

When the real-time operation starts in the first communication operation (WLAN) (step S211: YES), the control circuit 13 checks whether the communication load in the second communication operation (BT) is equal to or higher than a preset threshold value. (Step S212). For example, a bit error rate, a frame error rate, or a throughput can be used as the communication load index, but the communication load index is not limited thereto. The higher the communication load, the higher the error rate and the lower the throughput. Therefore, the communication load being equal to or higher than the threshold corresponds to the error rate being equal to or higher than the threshold or the throughput being equal to or lower than the threshold.

Next, the time distribution of the execution periods T1 and T2 is changed from the initial state based on the presence / absence of the real-time operation in the first communication operation and the communication load (greater than or less than the threshold value) in the second communication operation. (Step S213). Next, the data transfer standard in the first communication operation is changed from the initial state in accordance with the change in the time distribution between the execution periods T1 and T2 (step S214). Next, the data transfer standard in the second communication operation is changed from the initial state in accordance with the change in the time distribution between the execution periods T1 and T2 (step S215).

The time distribution of the execution periods T1 and T2, the data transfer standard in the first communication operation, and the data transfer standard in the second communication operation are set according to a setting example as shown in FIG. FIG. 8 shows the initial state of the operation state when the real-time operation is not executed in the first communication operation, the real-time operation is executed in the first communication operation, and the communication load in the second communication operation is large. When the operation state in the case of (greater than or equal to a predetermined threshold) is state 1, the real-time operation is executed in the first communication operation, and the communication load in the second communication operation is small (below the predetermined threshold) 8 shows setting examples of parameters in each operation state when the operation state of FIG. State 1 in FIG. 8 corresponds to the first state in claim 6 of the present invention, and state 2 in FIG. 8 corresponds to the second state in claim 6 of the present invention.

In the setting example shown in FIG. 8, T1: T2, which is an index indicating the ratio of the execution period T1 to the execution period T2, is 5: 5 in the initial state, 7: 3 in the state 1, and 8: 2 in the state 2. Become. That is, in the setting example shown in FIG. 6, the control circuit 13 changes the time distribution of the execution periods T1 and T2 when executing the real-time operation based on the communication load in the second communication operation in at least two stages. . Specifically, in the control circuit 13, the ratio of the execution period T1 to the execution period T2 is the smallest in the initial state, the ratio of the execution period T1 to the execution period T2 in the state 1 is larger than the initial state, and the state 2 The time distribution of the execution periods T1 and T2 is changed so that the ratio of the execution period T1 to the execution period T2 in FIG.

In the setting example shown in FIG. 8, the data transfer occupation time in the first communication operation is the shortest in the initial state, and is medium in state 1 (longer than the initial state and shorter than state 2). The data transfer standard in the first communication operation is set so as to be the longest in state 2. That is, in the setting example illustrated in FIG. 6, the control circuit 13 causes the occupation time of the data transfer in the execution period T1 in the state 1 to be longer than the initial state, and the occupation time of the data transfer in the execution period T1 in the state 2 The data transfer standard in the first communication operation is changed so as to be longer than that in the state 1. The data transfer standard in the first communication operation is similar to the method for changing the data transfer standard in the second communication operation in the first embodiment described above, and the link format and packet type used in the first communication operation. It can be easily changed by changing the format.

In the setting example shown in FIG. 8, the data transfer occupation time in the second communication operation is the longest in the initial state, and is medium in state 1 (shorter than the initial state and longer than state 2), The data transfer standard in the second communication operation is set so as to be the shortest in state 2. That is, in the setting example shown in FIG. 6, the control circuit 13 makes the data transfer occupation time in the execution period T2 in the state 1 shorter than the initial state, and the data transfer occupation time in the execution period T2 in the state 2 The data transfer standard in the second communication operation is changed so as to be shorter than the state 1. The data transfer standard in the second communication operation is the same as the method for changing the data transfer standard in the second communication operation in the first embodiment described above, and the link format and packet type used in the second communication operation. It can be easily changed by changing the format.

Thus, the parameters of the first communication operation and the second communication operation are set, and the real-time operation is started. Thereafter, the communication device 1 continues the real-time operation until the stream distribution or the voice call is finished (step S216: NO).

When the real-time operation is completed in the first communication operation (step S216: YES), the control circuit 13 returns the setting to the initial state (step S217). That is, the control circuit 13 returns the settings of the execution periods T1 and T2, the data transfer standard in the first communication operation, and the data transfer standard in the second communication operation to the initial state (default value). Then, normal operation is started. Thereafter, the communication device 1 continues normal operation until real-time operation is started again.

As described above, according to the present embodiment, the control circuit 13 changes the time distribution of the execution periods T1 and T2 in two stages when executing the real-time operation based on the communication load in the second communication operation. At the same time, the data transfer standard in the second communication operation when the real-time operation is executed is changed in two stages in accordance with the change in the time distribution between the execution periods T1 and T2. Thereby, based on the presence or absence of the real-time operation in the first communication operation and the communication load in the second communication operation, the time distribution of the execution periods T1 and T2 and the communication load in the second communication operation are more finely divided. It can be optimized, and it becomes easier to reduce the packet loss in the first communication operation and to suppress the occurrence of the communication failure in the second communication operation.

Further, according to the present embodiment, the control circuit 13 only changes the data transfer standard in the second communication operation when executing the real-time operation in accordance with the change in the time distribution of the execution periods T1 and T2. In addition, the data transfer standard in the first communication operation is also changed. This makes it possible to further optimize communication conditions when executing a real-time operation, further reducing packet loss in the first communication operation and suppressing occurrence of communication failure in the second communication operation. become.

Further, according to the present embodiment, the control circuit 13 determines that the ratio of the execution period T1 to the execution period T2 is the initial state when the communication load in the second communication operation is greater than or equal to the threshold when executing the real-time operation. The data transfer occupation time in the first communication operation is longer than the initial state, and the data transfer occupation time in the second communication operation is shorter than the initial state. In addition, when the real-time operation is executed by changing the time distribution of the execution periods T1 and T2, the data transfer standard in the first communication operation, and the data transfer standard in the second communication operation, When the communication load in the communication operation is less than the threshold, the ratio of the execution period T1 to the execution period T2 is larger than that in the state 1, and the data transfer is occupied in the first communication operation Time distribution of the execution periods T1 and T2 so that the period of time for data transfer in the second communication operation is shorter than the state 1 and the state 2 (second state) is shorter than the state 1 The data transfer standard in the communication operation and the data transfer standard in the second communication operation are changed. Thus, based on the communication load in the second communication operation, the time distribution of the execution periods T1 and T2, the data transfer standard in the first communication operation, the data transfer standard in the second communication operation, Is changed in two stages, so that when the communication load in the second communication operation is large, the decrease width of the execution period T2 is suppressed, the occurrence of a communication failure in the second communication operation is easily suppressed, and the execution is executed. Even when the increase width of the period T1 is reduced, the packet loss in the first communication operation can be easily reduced by optimizing the data transfer standard in the first communication operation. When the communication load in the second communication operation is small, the increase width of the execution period T1 can be further increased to further reduce the packet loss in the first communication operation.

Further, according to the present embodiment, the data transfer standard in the first communication operation includes the link format used when data is transmitted / received in the first communication operation, and the data transfer packetized data used in the first communication operation. It includes at least one of a packet type and a format format of data transmitted and received in the first communication operation. Then, by selecting one of the plurality of link formats having different data transfer occupation times in the execution period T1, the data transfer occupation time in the execution period T1 can be easily changed. Further, by selecting one of a plurality of packet types having different required data rates, it is possible to easily change the data transfer occupation time in the execution period T1. Further, by selecting one of a plurality of format formats having different required data rates, the data transfer occupation time in the execution period T1 can be easily changed.

Similarly, according to the present embodiment, the data transfer standard in the second communication operation is based on the link format used when data is transmitted / received in the second communication operation, and when data is packetized in the second communication operation. At least one of the following packet types and the format format of data transmitted and received in the second communication operation. Then, by selecting one of a plurality of link formats having different data transfer occupation times in the execution period T2, the data transfer occupation time in the execution period T2 can be easily changed. Further, by selecting one of a plurality of packet types having different required data rates, the data transfer occupation time in the execution period T2 can be easily changed. Further, by selecting one of a plurality of format formats having different required data rates, the occupation time of data transfer in the execution period T2 can be easily changed.

In this embodiment, the control circuit 13 distributes the time distribution of the execution periods T1 and T2, the data transfer standard in the first communication operation, and the data transfer in the second communication operation when executing the real-time operation. Although the transfer standard is changed in two stages, these settings may be changed in three stages or more. In this case, the larger the communication load in the second communication operation, the smaller the ratio of the execution period T1 to the execution period T2, the shorter the data transfer occupation time in the first communication operation, and the data in the second communication operation. The time distribution of the execution periods T1 and T2, the data transfer standard in the first communication operation, and the data transfer standard in the second communication operation may be set so that the transfer occupation time becomes longer. This makes it possible to further optimize communication conditions when executing a real-time operation, further reducing packet loss in the first communication operation and suppressing occurrence of communication failure in the second communication operation. become.

In the present embodiment, the control circuit 13 includes at least one of the time distribution of the execution periods T1 and T2, the data transfer standard in the first communication operation, and the data transfer standard in the second communication operation. One may be controlled stepwise according to the communication load of the second communication operation.

Further, in the present embodiment, the control circuit 13 performs real-time operation after setting the time distribution of the execution periods T1 and T2, the data transfer standard in the first communication operation, and the data transfer standard in the second communication operation. During execution of the communication, the communication load of the second communication operation is confirmed periodically or at a predetermined timing, and according to the communication load, the time distribution of the execution periods T1 and T2 and the first communication operation The data transfer standard and the data transfer standard in the second communication operation may be reset. Thereby, the parameters of the first communication operation and the second communication operation can be set to more appropriate values according to the communication load of the second communication operation.

It should be noted that the present invention is not limited to the configuration shown here, such as a combination with other elements in the configuration described in the above embodiment. These points can be changed without departing from the spirit of the present invention, and can be appropriately determined according to the application form.

In addition, this international application claims priority based on Japanese Patent Application No. 2018-035056 filed on February 28, 2018, the entire contents of which are incorporated herein by reference.

1: Communication device 2: Counter terminal 3: Counter terminal 11: First communication circuit 12: Second communication circuit 13: Control circuit 14: Antenna 15: Switch circuit

Claims

A first communication circuit that executes a first communication operation according to a first wireless communication standard;
A second communication circuit that executes a second communication operation according to a second wireless communication standard different from the first wireless communication standard;
A control circuit for controlling the first communication operation and the second communication operation;
With
In the first communication operation, the first communication circuit can execute a specific communication operation that requires real-time performance.
The control circuit includes:
The first communication circuit and the second communication circuit can be caused to perform a coexistence operation in which the first communication operation and the second communication operation are alternately performed in a time division manner,
When executing the coexistence operation, based on the presence or absence of the specific communication operation in the first communication operation, changing the time distribution between the first communication operation and the second communication operation,
A communication device that changes a data transfer standard in the second communication operation in accordance with a change in the time distribution.
The communication apparatus according to claim 1, wherein the specific communication operation is a communication operation corresponding to stream delivery or voice call.
The control circuit includes:
In accordance with the start of the specific communication operation, the time distribution is changed so that the ratio of the execution period of the first communication operation to the execution period of the second communication operation is longer than the initial state,
In accordance with the change in the time distribution, the data transfer standard in the second communication operation is changed so that the occupied time of data transfer in the second communication operation is shorter than the initial state,
The communication device according to claim 2, wherein the time distribution and the data transfer standard in the second communication operation are returned to the initial state in accordance with the end of the specific communication operation.
The control circuit includes:
Based on the communication load in the second communication operation, changing the time distribution when executing the specific communication operation in at least two stages,
4. The communication apparatus according to claim 3, wherein a data transfer standard in the second communication operation when the specific communication operation is executed is changed in at least two stages in accordance with the change in the time distribution.
The control circuit includes:
A data transfer standard in the first communication operation and a data transfer standard in the second communication operation when the specific communication operation is executed are changed in accordance with the change in the time distribution. Item 5. The communication device according to Item 4.
The control circuit includes:
When the communication load in the second communication operation when executing the specific communication operation is a predetermined threshold or more,
The ratio of the execution period is larger than the initial state, the data transfer occupation time in the first communication operation is longer than the initial state, and the data transfer occupation time in the second communication operation is greater than the initial state. Changing the time distribution, the data transfer standard in the first communication operation, and the data transfer standard in the second communication operation so as to be in the short first state,
When the communication load in the second communication operation when executing the specific communication operation is less than the threshold,
The ratio of the execution period is larger than that in the first state, the occupation time of data transfer in the first communication operation is longer than that in the first state, and the occupation time of data transfer in the second communication operation. The time distribution, the data transfer standard in the first communication operation, and the data transfer standard in the second communication operation are changed so that the second state is shorter than the first state. The communication device according to claim 5.
The data transfer standard in the first communication operation includes a link format when data is transmitted and received in the first communication operation, a packet type when data is packetized in the first communication operation, and the first Including at least one of format formats of data to be transmitted and received in one communication operation,
The data transfer standard in the second communication operation includes a link format when data is transmitted / received in the second communication operation, a packet type when data is packetized in the second communication operation, The communication apparatus according to claim 6, comprising at least one of a format format of data transmitted and received in the two communication operations.
A first communication circuit that executes a first communication operation according to a first wireless communication standard;
A second communication circuit that executes a second communication operation according to a second wireless communication standard different from the first wireless communication standard;
A control circuit for controlling the first communication operation and the second communication operation;
A communication method for a communication device comprising:
In the first communication operation, the first communication circuit can execute a specific communication operation that requires real-time performance.
The control circuit includes:
The first communication circuit and the second communication circuit can be caused to perform a coexistence operation in which the first communication operation and the second communication operation are alternately performed in a time division manner,
When executing the coexistence operation, based on the presence or absence of the specific communication operation in the first communication operation, changing the time distribution between the first communication operation and the second communication operation,
A communication method for changing a data transfer standard in the second communication operation in accordance with a change in the time distribution.
The communication method according to claim 8, wherein the specific communication operation is a communication operation corresponding to stream delivery or voice call.
The control circuit includes:
In accordance with the start of the specific communication operation, the time distribution is changed so that the ratio of the execution period of the first communication operation to the execution period of the second communication operation is longer than the initial state,
In accordance with the change in the time distribution, the data transfer standard in the second communication operation is changed so that the occupied time of data transfer in the second communication operation is shorter than the initial state,
The communication method according to claim 9, wherein the time distribution and the data transfer standard in the second communication operation are returned to the initial state in accordance with the end of the specific communication operation.