TW201635830A - Wireless communication device - Google Patents

Abstract

In a TDMA network, wireless communication is cut off. Disclosed is a wireless communication device 200 including a synchronization processing part 201 for executing a TDMA synchronization process between the device 200 and other wireless communication devices. Regarding the synchronization processing part 201, when receiving a synchronization signal from a wireless communication device of other TDMA networks having a synchronization timing different from that of a TDMA network the device 200 itself belongs to, based on the received synchronization signal, the synchronization processing part 201 maintains a synchronization state of the TDMA network to which the device 200 itself pertains, and changes the aforementioned TDMA network synchronization timing.

Description

Wireless communication device [Reference to reference]

The present invention is based on the patent application of the Japanese Patent Application No. 2015-066399, filed on March 27, 2015, the benefit of priority claims, the contents of which are hereby incorporated by reference.

The present invention relates to a wireless communication device, and more particularly to a wireless communication device that performs wireless communication on a TDMA (Time Division Multiple Access) network.

A plurality of wireless communication devices maintain a synchronous TDMA network at the same timing. On this TDMA network, it is important that the wireless communication device establish synchronization, and its method of establishing synchronization is disclosed in Patent Document 1.

Then, on the TDMA network, as shown in Fig. 1, the TDMA network is separated into two due to changes in the wireless environment, and it is often the case that synchronization has to be maintained at independent timings (see case 1 of Fig. 1). To case 2, symbols 10, 20). The offset of this timing has its dependence on the accuracy of the transmitter installed in the wireless communication device, but the high-precision transmitter is expensive, and it is not easy to install the wireless communication device with low cost requirement in the wireless communication device. of.

In the case that the offset of this timing cannot be ignored, in the TDMA network After the road is separated, the wireless environment changes again, and it is possible to perform wireless communication from one of the mutual TDMA networks (case 2 to case 3 in Fig. 1). In this case, it is not possible to immediately synchronize the synchronization of all the wireless communication devices, but directly repair the timing from the specific wireless communication device 14 that is relatively close to the wireless communication, and restore the synchronization (refer to case 3 in FIG. 1). Case4, symbol 30). Then, all of the wireless communication devices 11 to 15 are synchronously restored (Fig. 1 to case 5).

[advance technical documents] [Patent Document]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2011-234327

However, in the case of case 4 in Fig. 1, during the period in which the specific wireless communication device 14 resumes synchronization, the wireless communication device 15 that cannot directly perform wireless communication with other TDMA networks cannot temporarily follow the same TDMA network. The synchronization timing of the wireless communication device has a problem that the synchronization is cut off. For users who use this wireless communication device, communication of a wireless communication device that is considered to be communicable is accidentally cut off, which is a big problem in operation. In such a wireless communication device in which wireless communication is cut off, the TDMA network becomes larger and the number of the TDMA network increases.

Accordingly, an object of the present invention is to provide a wireless communication device capable of solving the above-described problems in which wireless communication is cut.

A wireless communication device according to one aspect of the present invention includes a wireless communication device that performs a synchronization processing unit for TDMA (Time Division Multiple Access) synchronization processing with another wireless communication device; and the synchronization processing unit is configured to be different When the wireless communication device belonging to another TDMA network receives the synchronization signal at the synchronization timing of the TDMA network to which the own device belongs, the TDMA network to which the own device belongs is maintained as the reference based on the received synchronization signal. State to change the synchronization timing of the above TDMA network.

Further, a program of the present invention is a program for synchronizing processing units for performing TDMA (Time Division_Multiple Access) synchronization processing with other wireless communication devices on the arithmetic unit included in the wireless communication device; a processing unit configured to maintain the synchronization signal based on the received synchronization signal on the basis of receiving the synchronization signal from a wireless communication device belonging to another TDMA network that is different from the synchronization timing of the TDMA network to which the own device belongs The synchronization state of the TDMA network to which the own device belongs is used to change the synchronization timing of the TDMA network.

Further, a wireless communication system of the present invention includes wireless communication including a plurality of TDMA networks to which a wireless communication device that performs a synchronization processing unit for TDMA (Time Division Multiple Access) synchronization processing with another wireless communication device belongs. a synchronization processing unit of the wireless communication device configured to belong to another TDMA network at a synchronization timing different from a TDMA network to which the own device belongs When the wireless communication device receives the synchronization signal, the synchronization timing of the TDMA network is changed by maintaining the synchronization state of the TDMA network to which the own device belongs, based on the received synchronization signal.

Further, a wireless communication method according to one aspect of the present invention is a wireless communication method based on a wireless communication device that performs a TDMA (Time Division Multiple Access) synchronization process with another wireless communication device; the wireless communication device is different from itself When the wireless communication device belonging to another TDMA network receives the synchronization signal, the synchronization communication timing of the TDMA network to which the device belongs is maintained in the synchronization state of the TDMA network to which the own device belongs, based on the received synchronization signal. To change the synchronization timing of the above TDMA network;

According to the present invention, it is possible to suppress the wireless communication between the wireless communication devices on the TDMA network from being cut off.

10, 20, 30‧‧‧TDMA network

11~15, 101‧‧‧ wireless communication device

102‧‧‧Communication Application Processing Department

103‧‧‧Wireless Control Department

104‧‧‧RF Department

105‧‧‧Antenna Department

106‧‧‧TDMA Synchronization Processing Department

107‧‧‧Transformation/Demodulation and Modification Unit

108‧‧‧RF Control Department

200‧‧‧Wireless communication device

201‧‧‧Synchronization Processing Department

[Fig. 1] is a diagram showing an example of a pattern of synchronization processing according to a TDMA network.

[Fig. 2] is a diagram showing an example of the pattern of the synchronization processing of the TDMA network according to the present invention.

[Fig. 3] is a structural block diagram showing a wireless communication device of the present invention.

[Fig. 4] shows the action of the wireless communication device disclosed in Fig. 3. flow chart.

[Fig. 5] is a detailed flowchart showing the timing repair processing disclosed in Fig. 4, and is an exemplary diagram of other operations compared with the state of the present invention.

[Fig. 6] is a detailed flowchart showing the timing repair processing disclosed in the fourth aspect of the present invention.

[Fig. 7] Fig. 7 is a structural block diagram showing a wireless communication device according to Supplementary Note 1 of the present invention.

[First Embodiment]

A first embodiment of the present invention will be described with reference to Figs. 2 to 6 . Fig. 2 is a view showing a pattern of synchronization processing in the entire wireless communication system. Figure 3 is a block diagram showing the construction of a wireless communication device. 4 to 6 are flowcharts showing the operation of the wireless communication device.

The wireless communication device of the present invention is a wireless communication device that performs TDMA synchronization processing with other wireless communication devices on a TDMA (Time Division Multiple Access) network, and thereby performs wireless communication using wireless communication devices. Further, in the present invention, as shown in Fig. 2, the configuration is a wireless communication system including a plurality of TDMA networks 10, 20 to which the plurality of wireless communication devices 11 to 15 belong.

Specifically, in the present invention, assuming a plurality of TDMA networks 10 and 20, as shown in FIG. 2, two TDMA networks 10 and 20 are separated due to changes in the wireless environment (case 1 of FIG. 2). To case2). After that, because the wireless environment changes again, if it is possible to wirelessly communicate from one of the TDMA networks (case 3 in Figure 2), then all the wireless channels may be available. The devices 11-15 are responsive to the same TDMA network 30 (case 4 of Figure 1). In other words, in the present invention, it is possible to suppress the synchronization of the wireless communication terminal 15 temporarily provided from being cut off without going through the case 4 of the second drawing described in the above-mentioned problem.

However, the wireless communication system and apparatus of the present invention are not necessarily limited to the situation shown in FIG. That is, in the wireless communication system and apparatus of the present invention, it is possible to apply the case where the TDMA synchronization processing is executed under any conditions.

Next, the structure and operation of the wireless communication devices 11 to 15 will be described in detail. Further, since any of the wireless communication devices 11 to 15 has the same configuration, one wireless communication device 101 will be exemplified below.

The wireless communication device 101 is an information processing device that includes a communication device, an arithmetic device, and a memory device and can perform wireless communication. Further, as shown in FIG. 3, the wireless communication device 101 includes an RF unit 104 and an antenna unit 105 as communication devices. Further, the wireless communication device 101 is constructed to execute a program by the arithmetic device, and includes a communication application processing unit 102 and a wireless control unit 103. The radio control unit 103 further includes a TDMA synchronization processing unit 106, a modulation/demodulation processing unit 107, and an RF control unit 108.

The function and operation of each of the above configurations will now be described together. On a TDMA network, it is necessary to establish TDMA synchronization with other wireless communication devices before the transmission or reception of sound or data. The receiving system is illustrated as an example. In the initial stage, the TDMA synchronization processing unit 106 waits for the reception state of the synchronization signal, and instructs the RF control unit 108 to perform the reception wait from the RF control unit 108.

When the antenna unit 105 receives the wireless signal transmitted from another wireless communication device, the RF unit 104 performs RF reception processing and transmits the signal to the wireless control unit 103. In the radio control unit 103, the synchronization processing is executed in the TDMA synchronization processing unit 106, and TDMA synchronization is established after the timing is repaired.

Thereafter, the above-described TDMA synchronization processing is periodically executed, and the signal is transmitted from the RF unit 104 to the communication application processing unit 102 via the wireless control unit 103 to transmit and receive sound processing or data transmission. .

Then, in the present invention, in particular, the internal processing of the TDMA synchronization processing section 106 has its characteristics. The details of the internal processing of the TDMA synchronization processing unit 106 (synchronization processing unit) will be described with reference to the flowcharts of Figs. 4 to 6 .

First, the flow of the entire operation in the receiving state will be described with reference to FIG. First, the process is started, and the reception wait process is executed (step S1). Next, it is confirmed whether or not the reception of the synchronization signal is present (step S2). When the synchronization signal is not received, the reception waits again (step S2: No, step S1), and if the synchronization signal is received, the timing repair processing is executed (step S2: Yes, step S3). Here, however, the wireless communication device belonging to a certain TDMA network performs timing repair processing when receiving a synchronization signal from other wireless communication devices belonging to other TDMA networks having different synchronization timings.

Next, regarding the routine processing of the sequence repair processing (step S3) of Fig. 4, the case of the conventional method and the method of the present invention will be described.

First, the above-described timing repair processing (step S3 of FIG. 4), The internal processing regarding the case of the conventional processing will be described with reference to Fig. 5. After the processing is started, the shift processing of the synchronization timing of the TDMA network to which the own device belongs is collectively performed (step S11) to the synchronization timing of the other TDMA networks received. After performing such processing, it returns to the reception wait of FIG. 4 again (step S1). At this time, if the amount of movement (variation) of the synchronization timing is too large, the synchronization of the TDMA network to which the wireless communication device belongs after the synchronization timing is shifted may be deviated, and the communication may be cut off.

On the other hand, in the method of the present invention, the internal processing of the above-described timing repair processing (step S3 of Fig. 4) is executed as shown in Fig. 6. After the processing is started, the processing of timing detection and saving of the timing is first performed (step S21). Next, it is confirmed that a certain period of time has elapsed after the time series measurement (step S22), and if the process has not elapsed after the predetermined time has elapsed (step S22: No), the process returns to the fourth figure. When a certain period of time has elapsed (step S22: Yes), the synchronization timing of the other wireless communication device acquired at this time and the synchronization timing of the TDMA network to which the own device belongs at this time are calculated as the reference to be moved (changed). The target value of the synchronization timing (step S23).

The calculation of the target value is, for example, a synchronization timing of another wireless communication device obtained as a target value or an intermediate value of two synchronization timings as a target value. At this time, the unique values of the other wireless communication device and the own device that have acquired the synchronization timing may be, for example, weighted by the value of the MAC address or the like to calculate the target value. For example, when the weight of the other wireless communication device is large based on a preset basis, the value of the synchronization timing acquired from the other wireless communication device or its approximate value is calculated as a target value.

Next, confirm whether the synchronization timing and target value of the device are Error (step S24). Here, the term "error" refers to a case where the difference between the synchronization timing and the target value is equal to or greater than a threshold value set in advance. If there is no error (step S24: No), the processing is terminated, and the processing returns to the fourth drawing. If there is an error (step S24: Yes), the movement (change) of the synchronization timing is executed (step S25).

The above-described synchronization timing shift performs an operation of bringing the synchronization timing close to the target value while the wireless communication device maintains the synchronization state of the TDMA network to which the own device belongs. At this time, the wireless communication device moves the synchronization sequence only in the TDMA network to which it belongs, only to the maximum value that can maintain synchronization. For example, the amount of movement is the value of a guard timer set on the TDMA network to which the wireless communication device belongs. Moreover, the so-called guard timer is to prevent the repetition of time caused by the inevitable error in the clock precision between the two or more devices of the TDMA network and the propagation time. time. Here, the amount of movement of the mobile synchronization timing may be maintained below the maximum value of the synchronization or below the guard timer if it is within the range in which the synchronization can be maintained on the associated TDMA network, or may be any value.

After the above-described synchronization processing of the synchronization timing (step S25), the processing of Fig. 4 is returned. By repeating these processes, it is possible to slowly shift the synchronization timing to the target value within the range in which each TDMA network can maintain synchronization. As a result, to the user, no unexpected communication is cut off, and the entire TDMA network can be synchronized in one timing.

As described above, in the present invention, when a plurality of TDMA networks having different synchronization timings are combined, the target values of the synchronization timings are determined in each TDMA network, and the TDMA networks before the combination are also maintained in synchronization. Come to The complex moves the synchronization timing to approach the target value. Thereby, the synchronization is not cut off, and one synchronization timing can be matched in the entire TDMA network. Moreover, in the calculation of the target value, weighting is performed on each of the wireless communication devices with independent values, which can cause early convergence of the repeated calculation. Further, it is not necessary to exchange information other than the synchronization signal between the plurality of wireless communication devices, and the synchronization processing can be performed in a distributed manner.

Further, in the above description, although the case where the wireless communication device that receives the synchronization signal performs the synchronization processing of the synchronization timing is exemplified, the synchronization signal side reception target value may be transmitted to execute the synchronization processing of the synchronization timing. That is to say, on a plurality of TDMA networks, the synchronization timing can also be performed on one TDMA network, or the synchronization timing can be performed on a plurality of TDMA networks.

<attachment>

One or all of the above embodiments are described in the accompanying notes below. Hereinafter, a schematic configuration of a wireless communication device (see FIG. 7), a program, and a wireless communication method according to the present invention will be described. However, it is not limited to the following construction.

(Note 1)

A wireless communication device includes a wireless communication device 200 that performs a TDMA (Time Division Multiple Access) synchronization process with another wireless communication device; the synchronization processing unit 201 is different from the own device. When the wireless communication device belonging to another TDMA network receives the synchronization signal, the synchronization timing of the TDMA network is maintained in the synchronization state of the TDMA network to which the own device belongs, based on the received synchronization signal, to change the above. TDMA Synchronization timing of the network.

(Note 2)

In the wireless communication device described in the first aspect, the synchronization processing unit changes the synchronization timing of the TDMA network while maintaining the maximum amount of the synchronization state of the TDMA network to which the own device belongs.

(Note 3)

The wireless communication device as described in Supplementary Note 1 or Attachment 2, wherein the synchronization processing unit changes the synchronization timing of the TDMA network within a guard timer set in wireless communication of a TDMA network to which the own device belongs. .

(Note 4)

The wireless communication device according to any one of the preceding claims, wherein the synchronization processing unit synchronizes the synchronization timing of the TDMA network to which the own device belongs and the synchronization timing of the other TDMA network that receives the synchronization signal. The reference is to set a target value of the synchronization timing of the TDMA network to which the own device belongs, and to maintain the synchronization state of the TDMA network to which the own device belongs, to change the synchronization timing of the TDMA network to approach the target value. .

(Note 5)

The wireless communication device according to any one of the preceding claims, wherein the synchronization processing unit synchronizes the TDMA network to which the own device belongs based on the unique value of the own device and the wireless communication device belonging to the other TDMA network. The timing and the synchronization timing of the other TDMA networks receiving the synchronization signal are weighted to set the target value.

(Note 6)

A wireless communication system comprising: a wireless communication system including a plurality of TDMA networks to which a wireless communication device that performs a synchronization processing unit for TDMA (Time Division Multiple Access) synchronization processing with another wireless communication device; the wireless communication device described above The synchronization processing unit receives the synchronization signal from the wireless communication device belonging to the other TDMA network at a synchronization timing different from the TDMA network to which the own device belongs, and maintains the own device as the reference based on the received synchronization signal. The synchronization state of the TDMA network to which it belongs is used to change the synchronization timing of the above TDMA network.

(Note 7)

The wireless communication system according to the first aspect, wherein in the plurality of TDMA networks, the synchronization processing unit of the wireless communication device belonging to at least one TDMA network changes a synchronization timing of a TDMA network to which the own device belongs.

(Note 8)

A program for implementing a program of a synchronization processing unit that performs TDMA (Time Division Multiple Access) synchronization processing with another wireless communication device in an arithmetic unit included in the wireless communication device; the synchronization processing unit The wireless communication device belonging to another TDMA network, which is different from the synchronization timing of the TDMA network to which the own device belongs, receives the synchronization signal, and maintains the TDMA network to which the own device belongs, based on the received synchronization signal. The synchronization state is used to change the synchronization timing of the above TDMA network.

(Note 9)

A wireless communication method is a wireless communication method based on a wireless communication device that performs TDMA (Time Division Multiple Access) synchronization processing with other wireless communication devices; the wireless communication device is different from the TDMA network to which the own device belongs When the wireless communication device belonging to another TDMA network receives the synchronization signal, the TDMA network is changed while maintaining the synchronization state of the TDMA network to which the own device belongs based on the received synchronization signal. Synchronization timing.

(Note 10)

The wireless communication method according to the ninth aspect, wherein in the plurality of TDMA networks, the wireless communication device belonging to the at least one TDMA network changes the synchronization timing of the TDMA network to which the own device belongs.

(Note 11)

The wireless communication method according to supplementary note 10, wherein the wireless communication device changes the synchronization timing of the TDMA network while maintaining the maximum amount of synchronization of the TDMA network to which the own device belongs.

(Note 12)

The wireless communication method according to supplementary note 10 or claim 11, wherein the wireless communication device changes the synchronization timing of the TDMA network within a guard timer set in wireless communication of a TDMA network to which the own device belongs.

(Note 13)

The wireless communication method according to any one of the appended claims, wherein the wireless communication device is based on a synchronization timing of a TDMA network to which the own device belongs, and a synchronization timing of the other TDMA network receiving the synchronization signal as a reference. The target value of the synchronization timing of the TDMA network to which the own device belongs is set, and the synchronization state of the TDMA network to which the own device belongs is maintained as it is, and the synchronization timing of the TDMA network is changed to approach the target value.

(Note 14)

The wireless communication method according to the supplementary note 13, wherein the wireless communication device uses the unique value of the own device and the wireless communication device belonging to the other TDMA network as a reference, and synchronizes the timing and reception synchronization of the TDMA network to which the own device belongs. The synchronization timing of the other TDMA networks of the signals is weighted to set the target value.

Moreover, the above program is memorized in the memory device or recorded on a memory medium readable by the computer. For example, a memory medium is a removable medium such as a floppy disk, a compact disk, a magneto-optical disk, or a semiconductor memory.

The invention of the present application has been described above with reference to the above embodiments, but the invention of the present application is not limited to the above embodiments. In the construction and details of the invention of the present application, various changes can be made by those skilled in the art within the scope of the invention.

200‧‧‧Wireless communication device

201‧‧‧Synchronization Processing Department

Claims (10)

A wireless communication device comprising: a synchronization processing unit that performs TDMA (Time Division Multiple Access) synchronization processing with another wireless communication device; wherein the synchronization processing unit belongs to a synchronization timing different from a TDMA network to which the own device belongs When the wireless communication device of the other TDMA network receives the synchronization signal, the synchronization timing of the TDMA network is changed by maintaining the synchronization state of the TDMA network to which the own device belongs, based on the received synchronization signal. The wireless communication device according to claim 1, wherein the synchronization processing unit changes the synchronization timing of the TDMA network while maintaining the maximum amount of the synchronization state of the TDMA network to which the own device belongs. The wireless communication device according to claim 1 or 2, wherein the synchronization processing unit changes the TDMA network within a protection timer set in wireless communication of a TDMA network to which the own device belongs. Synchronous timing. The wireless communication device according to any one of claims 1 to 3, wherein the synchronization processing unit uses a synchronization timing of a TDMA network to which the own device belongs, and the other TDMA network that receives the synchronization signal. The synchronization timing is used as a reference to set a target value of the synchronization timing of the TDMA network to which the own device belongs, and to maintain the synchronization state of the TDMA network to which the own device belongs, to change the synchronization timing of the TDMA network to approach The above target value. A wireless communication device as described in claim 4, wherein the same The step processing unit determines, according to the unique value of the own device and the wireless communication device belonging to the other TDMA network, the synchronization timing of the TDMA network to which the own device belongs and the synchronization timing of the other TDMA network receiving the synchronization signal. Weighting to set the above target value. A wireless communication system including a plurality of TDMA networks including a synchronization processing unit that performs a TDMA (Time Division Multiple Access) synchronization processing with another wireless communication device; wherein the synchronization processing unit of the wireless communication device, When receiving a synchronization signal from a wireless communication device belonging to another TDMA network that is different from the synchronization timing of the TDMA network to which the own device belongs, the TDMA network to which the own device belongs is maintained as a reference based on the received synchronization signal. The synchronization state of the path changes the synchronization timing of the above TDMA network. The wireless communication system according to claim 1, wherein in the plurality of TDMA networks, the synchronization processing unit of at least one of the wireless communication devices belonging to the TDMA network changes the TDMA network to which the own device belongs. Synchronization timing of the road. A synchronization processing unit for performing a TDMA (Time Division Multiple Access) synchronization process with another wireless communication device on a computing device included in the wireless communication device; wherein the synchronization processing unit is different from the self device When the wireless communication device belonging to another TDMA network receives the synchronization signal, the synchronization timing of the associated TDMA network is maintained in the synchronization state of the TDMA network to which the own device belongs, based on the received synchronization signal. Change the synchronization timing of the above TDMA network. A wireless communication method is a wireless communication method according to a wireless communication device that performs TDMA (Time Division Multiple Access) synchronization processing with other wireless communication devices; wherein the wireless communication device is different from a TDMA network to which the own device belongs When the wireless communication device belonging to another TDMA network receives the synchronization signal, the TDMA network is changed while maintaining the synchronization state of the TDMA network to which the own device belongs based on the received synchronization signal. Synchronization timing. The wireless communication method according to claim 9, wherein in the plurality of TDMA networks, at least one of the wireless communication devices belonging to the TDMA network changes the synchronization timing of the TDMA network to which the own device belongs.