JP5994475B2 - Communication device - Google Patents

Description

  The present invention relates to a communication apparatus capable of mapping (accommodating) a plurality of types of signals to a communication frame.

  As a technique for mapping a plurality of types of signals to a communication frame, a technique for mapping an ATM signal, a TDM (Time Division Multiplexing) signal, and an Ethernet (registered trademark) signal to a communication frame is known (for example, Patent Document 1). reference).

JP 2008-160658 A

  In addition, in a communication device such as a wireless communication device used in a mobile backhaul area that accommodates a plurality of radio base stations and connects to a core network, a TDM signal and an Ethernet signal are sent to the data portion (fixed length) of the TDM frame. Some are mapping. Such a communication apparatus includes a mapping information storage unit in which mapping information is recorded. The mapping information is information indicating the ratio of the TDM signal and the Ethernet signal mapped to the TDM frame, and can be, for example, the number of channels of the TDM signal to be mapped. When transmitting the TDM frame, the TDM signal and the Ethernet signal are mapped to the data part of the TDM frame based on the mapping information recorded in the mapping information storage part. For example, when the mapping information is represented by the number of channels of the TDM signal, the TDM signals corresponding to the number of channels specified by the mapping information are mapped to the data part, and the Ethernet signal is mapped to the remaining part. Further, when receiving the TDM frame, the TDM signal and the Ethernet signal are distinguished and extracted from the data part of the TDM frame based on the mapping information recorded in the mapping information storage part.

  By the way, in recent years, in the mobile backhaul area, there is a movement to convert all communications to IP (Internet Protocol), and in connection with this, in the communication device used in the mobile backhaul area, the ratio of the Ethernet signal to be mapped is increased, The proportion of TDM signal needs to be reduced. In order to change the ratio between the Ethernet signal to be mapped and the TDM signal, the mapping information recorded in the mapping information storage unit may be changed.

  Here, if the mapping information recorded in the mapping information storage unit in the communication device on the transmission side and the reception side does not match, the signal cannot be normally received. Now, for example, data (signals) for 64 channels can be accommodated in the data part of the TDM frame, and the mapping information recorded in the mapping information storage part of the communication device on the transmission side and the reception side is “TDM Ch = 32 (number of channels of TDM signal to be mapped = 32) ”and“ TDM Ch = 33 (number of channels of TDM signal to be mapped = 33) ”. In this case, as shown in FIG. 12A, the communication device on the transmission side receives TDM signals Ch-1 to Ch-32 for 32 channels and Ethernet signals ETH-1 to ETH-32 for 32 channels. The TDM frame mapped to the data part is transmitted to the receiving side. However, in the communication device on the receiving side, the data portion of the received TDM frame includes TDM signals Ch1 to Ch33 for 33 channels and Ethernet signals ETH # 1 to 31 for 31 channels as shown in FIG. Since it is recognized that ETH # 31 is mapped, the TDM signal cannot be normally received. In FIG. 12, TDM OH represents overhead.

  Thus, if the mapping information recorded in the mapping information storage unit in the communication device on the transmission side and the reception side does not match, the signal cannot be normally received. Therefore, it is conceivable that the mapping information recorded in the mapping information storage unit is simultaneously changed in the communication device on the transmission side and the reception side. However, even if the mapping information is changed simultaneously on the transmitting side and the receiving side, the TDM frame transmitted from the transmitting side communication device before the mapping information is changed and received by the receiving side communication device after the mapping information is changed. Cannot receive the signal normally.

[Object of the present invention]
Accordingly, an object of the present invention is to provide a communication apparatus that solves the problem that a signal mapped to a communication frame cannot be normally received during a transition period in which mapping information is changed.

The communication apparatus according to the present invention is
A plurality of mapping information storage units in which mapping information is recorded;
A selection unit for selecting one of the plurality of mapping information storage units;
A mapping information changing unit that switches a selection destination of the selection unit so as to select a mapping information storage unit in which mapping information of the same content is recorded at the same change timing as the communication device of the communication partner;
Frame generating means for generating a communication frame mapping the first type signal and the second type signal based on the mapping information recorded in the mapping information storage unit selected by the selection unit. After the change timing, a frame generation unit that generates a communication frame including change information indicating that the mapping information has been changed;
When the change information is included in the communication frame received after the change timing, the first information is transmitted from the communication frame based on the mapping information recorded in the mapping information storage unit selected by the selection unit. If the type signal and the second type signal are distinguished and extracted, and change information is not included, the signal is recorded in the mapping information storage unit selected before the selection unit switches the selection destination. And a frame dividing unit that distinguishes and extracts the first type signal and the second type signal from the communication frame based on mapping information.

A communication system according to the present invention includes:
A management terminal device, a transmission device, and a reception device;
The management terminal device transmits a mapping information change instruction including a change content and change timing of mapping information to the transmission device and the reception device,
The transmitter is
A plurality of transmission side mapping information storage units in which mapping information is recorded;
A transmission side selection unit that selects one of the plurality of transmission side mapping information storage units;
A transmission side mapping information changing unit that switches a selection destination of the transmission side selection unit so as to select a transmission side mapping information storage unit in which transmission side mapping information of the same content is recorded at the same change timing as the reception device; ,
Transmission for generating a communication frame in which the first type signal and the second type signal are mapped based on the mapping information recorded in the transmission side mapping information storage unit selected by the transmission side selection unit A transmission side frame generation unit that generates a communication frame including change information indicating that the mapping information has been changed after the change timing,
The receiving device is:
A plurality of receiving-side mapping information storage units in which mapping information is recorded;
A receiving side selection unit that selects one of the plurality of receiving side mapping information storage units;
A receiving side mapping information changing unit that switches a selection destination of the receiving side selecting unit so as to select a receiving side mapping information storing unit in which mapping information of the same content is recorded at the same change timing as the transmitting device;
When change information is included in the communication frame received after the change timing, from the communication frame based on the mapping information recorded in the reception side mapping information storage unit selected by the reception side selection unit If the first type signal and the second type signal are distinguished and extracted, and change information is not included, the receiving side mapping selected before the receiving side selection unit switches the selection destination A receiving-side frame dividing unit that distinguishes and extracts the first type signal and the second type signal from the communication frame based on mapping information recorded in the information storage unit.

The transmission device according to the present invention is:
A plurality of mapping information storage units in which mapping information is recorded;
A selection unit for selecting one of the plurality of mapping information storage units;
A mapping information changing unit that switches a selection destination of the selection unit so as to select a mapping information storage unit in which mapping information of the same content is recorded at the same change timing as the communication device of the communication partner;
Frame generating means for generating a communication frame mapping the first type signal and the second type signal based on the mapping information recorded in the mapping information storage unit selected by the selection unit. Then, after the change timing, a frame generation unit that generates a communication frame including change information indicating that the mapping information has been changed.

The receiving apparatus according to the present invention is
A plurality of mapping information storage units in which mapping information is recorded;
A selection unit for selecting one of the plurality of mapping information storage units;
A mapping information changing unit that switches a selection destination of the selection unit so as to select a mapping information storage unit in which mapping information of the same content is recorded at the same change timing as the communication device of the communication partner;
When the change information is included in the communication frame received after the change timing, the first information is transmitted from the communication frame based on the mapping information recorded in the mapping information storage unit selected by the selection unit. If the type signal and the second type signal are distinguished and extracted, and change information is not included, the signal is recorded in the mapping information storage unit selected before the selection unit switches the selection destination. And a frame dividing unit that distinguishes and extracts the first type signal and the second type signal from the communication frame based on mapping information.

A communication method according to the present invention includes:
A communication method executed by a computer including a plurality of mapping information storage units in which mapping information is recorded, a selection unit, a mapping information change unit, a frame generation unit, and a frame division unit,
The selection means selects one of the plurality of mapping information storage units;
The mapping information change unit switches the selection destination of the selection unit so as to select a mapping information storage unit in which the same mapping information is recorded at the same change timing as the communication apparatus of the communication partner,
The frame generation unit generates a communication frame obtained by mapping the first type signal and the second type signal based on the mapping information recorded in the mapping information storage unit selected by the selection unit. Frame generating means for generating a communication frame including change information indicating that the mapping information has been changed after the change timing;
When the frame division unit includes change information in the communication frame received after the change timing, the communication is performed based on the mapping information recorded in the mapping information storage unit selected by the selection unit. When the first type signal and the second type signal are distinguished and extracted from the frame and change information is not included, the mapping information storage selected before the selection unit switches the selection destination Based on the mapping information recorded in the section, the first type signal and the second type signal are distinguished and extracted from the communication frame.

The program according to the present invention is:
A program for causing a computer including a plurality of mapping information storage units in which mapping information is recorded to function as a communication device,
The computer,
A selection unit for selecting one of the plurality of mapping information storage units;
A mapping information changing unit that switches a selection destination of the selection unit so as to select a mapping information storage unit in which mapping information of the same content is recorded at the same change timing as the communication device of the communication partner,
Frame generating means for generating a communication frame mapping the first type signal and the second type signal based on the mapping information recorded in the mapping information storage unit selected by the selection unit. After the change timing, a frame generation unit that generates a communication frame including change information indicating that the mapping information has been changed,
When the change information is included in the communication frame received after the change timing, the first information is transmitted from the communication frame based on the mapping information recorded in the mapping information storage unit selected by the selection unit. If the type signal and the second type signal are distinguished and extracted, and change information is not included, the signal is recorded in the mapping information storage unit selected before the selection unit switches the selection destination. Based on the mapping information, it is made to function as a frame dividing unit that distinguishes and extracts the first type signal and the second type signal from the communication frame.

  According to the present invention, it is possible to obtain an effect that a signal mapped to a communication frame can be normally received even in a transition period in which mapping information is changed.

It is a block diagram which shows the example of a communication system structure concerning the 1st Embodiment of this invention. It is a figure which shows an example of a TDM frame. 2 is a block diagram illustrating a configuration example of a wireless communication card 11. FIG. It is a figure for showing the relationship between mapping information and the signal mapped. 3 is a block diagram illustrating a configuration example of a line signal processing unit 16. FIG. 6 is a block diagram illustrating a configuration example of a mapping information management unit 166. FIG. It is a time chart for demonstrating operation | movement of 1st Embodiment. 10 is a flowchart illustrating a processing example of a mapping information management unit 166. 10 is a flowchart illustrating a processing example of a TDM frame generation unit 165. 10 is a flowchart illustrating a processing example of a TDM frame decomposition unit 167. It is a block diagram which shows the structural example of the communication apparatus concerning the 2nd Embodiment of this invention. It is a figure for demonstrating the problem of background art.

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

[First embodiment of the present invention]
Referring to FIG. 1, the communication system according to the first embodiment of the present invention includes wireless communication devices 1 and 2 and NMS (Network Management System) terminal devices 3 and 4 for performing maintenance management. Yes.

  As shown in FIG. 2, the wireless communication apparatuses 1 and 2 transmit TDM frames obtained by mapping the signals Ch-1 to Ch-i of the TDM channels and the Ethernet signals ETH-1 to ETH-j to the data part. Transmit and receive wirelessly. In the following description, it is assumed that the data portion of the TDM frame can accommodate 64 channels of data (k × 64 bits) with “k bits” per channel.

  The NMS terminal devices 3 and 4 transmit a mapping information change instruction including the mapping information after the change and the change time to the wireless communication devices 1 and 2. Note that the same mapping information change instruction is transmitted from the NMS terminal devices 3 and 4 to the wireless communication devices 1 and 2.

  Referring to FIG. 3, the wireless communication card 11 mounted on the wireless communication devices 1 and 2 includes input terminals 12-1 to 12-64 of Ethernet signals ETH-1 to ETH-64 and TDM signals Ch-1 to Ch-64 input terminals 13-1 to 13-64, Ethernet signal ETH-1 to ETH-64 output terminals 14-1 to 14-64, and TDM signals Ch-1 to Ch-64 output terminals 15- 1 to 15-64, a line signal processing unit 16, a modem unit 17, a transmission / reception unit 18, a radio signal output terminal 19, and a radio signal input terminal 20. In this embodiment, the input terminal with the lower number is preferentially used for the input of the Ethernet signal and the TDM signal, and the input terminal with the lower number is preferentially used for the output of the Ethernet signal and the TDM signal. Used for. For example, when 30 lines of Ethernet signals ETH-1 to ETH-30 are input, the Ethernet signals are input using the input terminals 12-1 to 12-30.

  The line signal processing unit 16 has a function of generating a TDM frame in which the TDM signal and the Ethernet signal are mapped in the data part at a rate indicated by the mapping information and outputting the TDM frame to the modem unit 17. For example, if the data portion of the TDM frame can accommodate signals for 64 channels and the mapping information is “TDM Ch = 30”, as shown in FIG. TDM signals Ch-1 to Ch-30 input from, and Ethernet signals ETH-1 to ETH-34 input from the input terminals 12-1 to 12-34 are generated in the data part, and a TDM frame is generated. The data is output to the modem unit 17. Further, the line signal processing unit 16 distinguishes and extracts the TDM signal and the Ethernet signal from the TDM frame passed from the modem unit 17 based on the mapping information, and outputs it from the corresponding output terminal. For example, assuming that the data portion of the TDM frame can accommodate signals for 64 channels and the mapping information is “TDM Ch = 30”, the TDM signals Ch-1 to Ch-30 and Ethernet signals ETH-1 to ETH-34 are taken out and output to output terminals 15-1 to 15-30 and output terminals 14-1 to 14-34, respectively. The detailed configuration of the line signal processing unit 16 will be described later with reference to FIGS.

  The modem unit 17 has a function of modulating the TDM frame input from the line signal processing unit 16 and passing it to the transmission / reception unit 18, and a function of demodulating the modulation signal from the transmission / reception unit 18 and outputting a TDM frame.

  The transmission / reception unit 18 has a function of converting the modulation signal from the modulation / demodulation unit 17 into a radio signal and outputting it to the output terminal 19, and a function of converting the radio signal from the input terminal 20 into a modulation signal and outputting the modulation signal to the modulation / demodulation unit 17. Have.

  Referring to FIG. 5, the line signal processing unit 16 (referred to as the line signal processing unit 16 in the wireless communication device 1) includes an in-device receiving unit 161, an Ethernet signal buffer unit 162, a TDM overhead buffer unit 163, and a TDM. Signal buffer unit 164, TDM frame generation unit 165, mapping information management unit 166, TDM frame division unit 167, Ethernet signal buffer unit 168, TDM overhead buffer unit 169, TDM data buffer unit 170, and in-device A transmission unit 171.

  The Ethernet signal buffer unit 162 is provided with a buffer area for each of the input terminals 12-1 to 12-64. The size of each buffer area is equal to the number of bits of the TDM signal for one channel (k bits described above) mapped to the data portion of the TDM frame. The TDM overhead buffer unit 163 is provided with a buffer area corresponding to the size of the overhead of the TDM frame. The TDM signal buffer unit 164 is provided with a buffer area for each of the input terminals 13-1 to 13-64. The size of each buffer area is equal to the number of bits of the TDM signal for one channel (k bits described above) mapped to the data portion of the TDM frame.

  The in-device receiving unit 161 converts the Ethernet signal input from each input terminal of the Ethernet signal input terminals 12-1 to 12-64 to which the Ethernet signal is actually input into k bits. It has a function of recording sequentially in corresponding buffer areas provided in the Ethernet signal buffer unit 162 one by one. As described above, in this embodiment, an input terminal with a smaller number is preferentially used for inputting an Ethernet signal.

  Further, the in-device receiving unit 161 receives the TDM signal input from the input terminal of each of the TDM signal input terminals 13-1 to 13-64 to which the TDM signal is actually input. It has a function of sequentially recording k bits at a time in a corresponding buffer area provided in the TDM signal buffer unit 164. As described above, in this embodiment, an input terminal with a smaller number is preferentially used for inputting a TDM signal. The intra-device receiving unit 161 has a function of recording the TDM overhead in the TDM overhead buffer unit 163 every time k bytes of data are recorded in the corresponding buffer areas of the TDM signal buffer unit 164.

  The mapping information management unit 166 (referred to as the mapping information management unit 166 in the wireless communication device 1) has a function of changing mapping information in accordance with a mapping information change instruction from the NMS terminal device 3. Referring to FIG. 6, the mapping information management unit 166 includes a mapping information change unit 180, first and second mapping information storage units 181 and 182, and a selector 183.

  When the mapping information change unit 180 receives the mapping information change instruction including the changed mapping information and the change time from the NMS terminal device 3, the mapping information recorded in the second mapping information storage unit 182 The mapping information change bit output to the TDM frame generation unit 165, the TDM frame division unit 167, and the first selector 183 when the function for changing to the mapping information after the change or the above change time is reached is “0”. The function for changing from “1” to “1”, and when the fixed time has elapsed from the change time, the mapping information before the change is recorded as the mapping information after the change recorded in the second mapping information storage unit 182. Copy to the first mapping information storage unit 181 and then change the mapping information change bit from “1” to “0”. Having. Note that the fixed time needs to be longer than the time from when the transmitting-side wireless communication apparatus transmits the TDM frame to when the receiving-side wireless communication apparatus receives the TDM frame.

  The selector 183 selects the first mapping information storage unit 181 when the mapping information change bit output from the mapping information change unit 180 is “0”, and stores the second mapping information storage when it is “1”. A function to be selected by the unit 182, a function for passing the mapping information recorded in the currently selected mapping information storage unit, or a TDM frame dividing unit when mapping information is requested from the TDM frame generation unit 165 When the mapping information on the selected side is requested from 167, the mapping information recorded in the currently selected mapping information storage unit is passed, and when the mapping information is requested on the non-selected side, the current selection is performed. The mapping information recorded in the mapping information storage unit that is not used is passed.

  Returning to FIG. 5, the TDM frame generation unit 165 includes the information recorded in each of the buffer units 162 to 164 and the mapping selected by the selector 183 in the first and second mapping information storage units 181 and 182. Based on the mapping information recorded in the information storage unit and the mapping information change bit output from the mapping information management unit 166, a TDM frame in which the TDM signal and the Ethernet signal are mapped to the data unit is generated, and the modem unit 17 has a function of outputting to the computer. The TDM frame generation unit 165 sets the overhead specific bit to “1” when the mapping information change bit is “1”, and sets the overhead specific bit to “0” when the mapping information change bit is “0”. A TDM frame with “” is generated.

  The Ethernet signal buffer unit 168 is provided with a buffer area for each of the output terminals 14-1 to 14-64. The size of each buffer area is equal to the number of bits (k bits) of one channel of TDM signal mapped to the data portion of the TDM frame. The TDM overhead buffer unit 169 is provided with a buffer area corresponding to the size of the overhead of the TDM frame. The TDM signal buffer unit 170 is provided with a buffer area for each of the output terminals 15-1 to 15-64. The size of each buffer area is equal to the number of bits (K bits) of one channel of TDM signal mapped to the data portion of the TDM frame.

  When the mapping information change bit output from the mapping information change unit 180 is “0”, and the mapping information change bit is “1”, the TDM frame division unit 167 is passed from the modem unit 17. When the specific bit of the overhead of the TDM frame is “1”, the selector 183 is requested for mapping information on the selection side, the mapping information change bit is “1”, and the specific bit is “0”. In this case, based on the function for requesting the mapping information on the non-selection side or the mapping information sent from the selector 183 in response to the request, the Ethernet signal and the TDM A function that distinguishes between overhead and TDM signals and extracts the extracted Ethernet signal, overhead, and TDM signal. Ethernet signal buffer section 168, TDM overhead buffer 169, and has a function of recording the TDM signal buffer section 170.

  The in-device transmission unit 171 has a function of extracting an Ethernet signal from a buffer area in which a valid Ethernet signal is recorded in the buffer area provided in the Ethernet signal buffer unit 168 and outputting the Ethernet signal to a corresponding output terminal, The TDM signal buffer unit 170 has a function of extracting a TDM signal from a buffer area in which a valid TDM signal is recorded, and outputting the TDM signal to a corresponding output terminal.

  The line signal processing unit 16 can be realized by a CPU (Central Processing Unit). In this case, for example, the following processing is performed. A disk, a semiconductor memory, and other recording media recording a program for causing the CPU to function as the line signal processing unit 16 are prepared, and the CPU reads the program. The CPU controls its own operation in accordance with the read program, so that the in-device reception unit 161, the TDM frame generation unit 165, the mapping information management unit 166, the TDM frame division unit 167, and the in-device transmission unit 171 are provided on the CPU. Realize.

[Operation of First Embodiment]
Next, the operation of the present embodiment will be described in detail.

  Now, in order to change the mapping information used in the wireless communication devices 1 and 2, it is assumed that the same mapping information change instruction is transmitted from the NMS terminal devices 3 and 4 to the wireless communication devices 1 and 2 ( Time t1) in FIG. The mapping information change instruction includes the changed mapping information and the change time. This mapping information is received by the mapping information management unit 166 in the wireless communication apparatuses 1 and 2.

  When receiving the mapping information change instruction, the mapping information changing unit 180 in the mapping information managing unit 166 receives the selector 183 in the first and second mapping information storage units 181 and 182 as shown in the flowchart of FIG. The changed mapping information is written in the mapping information storage unit not selected by (Step S81). At this time, as shown in FIG. 7, since the mapping information change bit is “0” and the first mapping information storage unit 181 is selected, it is changed to the second mapping information storage unit 182. The mapping information is written.

  In this state in which the mapping information change bit is “0”, the TDM frame generation unit 165 performs the following processing.

  As shown in FIG. 9, the TDM frame generation unit 165 requests the mapping information from the selector 183, and the mapping information (mapping before change) recorded in the mapping information storage unit 181 currently selected by the selector 183. ) Is acquired (step S91). Thereafter, it is checked whether or not the mapping information change bit is “1” (step S92). In this case, since the mapping information change bit is “0” (No in step S92), the TDM frame generation unit 165 extracts the TDM overhead from the TDM overhead buffer unit 163 and sets the specific bit to “0” ( Step S93). The specific bit is set to “0” to indicate that the TDM frame is generated using the mapping information before the change. As the specific bit, an unused 1 bit in the reserved area is used in consideration of communication with an existing device.

  Next, the TDM frame generation unit 165 extracts TDM signals for the number of channels indicated by the mapping information from the TDM data buffer unit 163, and maps them to the data portion of the TDM frame (steps S95 and S96).

  Thereafter, the TDM frame generation unit 165 extracts Ethernet signals for the number of channels indicated by the mapping information from the Ethernet signal buffer unit 162, and maps them to the data part of the TDM frame (steps S97 and S98). Thereby, a TDM frame as shown in FIG. 2 in which the TDM signal and the Ethernet signal are mapped to the data portion is generated.

  After the generated TDM frame is transmitted to the modem unit 17 (step S99), the process of step S91 is performed again.

  Returning to FIG. 8 again, when the processing of step S81 is completed, the mapping information change unit 180 waits for the change time specified by the mapping information change instruction, and when the change time comes, the TDM frame generation unit 165 and The mapping information change bit output to the selector 183 is changed from “0” to “1” (steps S82 and S83, time t2 in FIG. 7). As a result, the selector 183 enters the state where the second mapping information storage unit 182 is selected.

  In this state in which the mapping information change bit is “1”, the TDM frame generation unit 165 performs the following processing.

  As shown in FIG. 9, the TDM frame generation unit 165 requests the mapping information from the selector 91 and acquires the mapping information (the mapping after the change) recorded in the currently selected mapping information storage unit 182. (Step S91). Thereafter, it is checked whether or not the mapping information change bit is “1” (step S92). In this case, since the mapping information change bit is “1” (Yes in step S92), the TDM frame generation unit 165 extracts the TDM overhead from the TDM overhead buffer unit 163 and sets the specific bit to “1” ( Step S93). The specific bit is set to “1” to indicate that the TDM frame is generated using the mapping information after the change. The subsequent processing is the same as when the mapping information change bit is “0”.

  Returning again to FIG. 8, when the mapping information change unit 180 sets a mapping information change bit to “1” (time t2 in FIG. 7) and a predetermined time has elapsed (step S84 is Yes, time t3 in FIG. 7), The changed mapping information recorded in the second mapping information storage unit 182 is copied to the first mapping information storage unit 181 (step S85). When the copying is completed (time t4 in FIG. 7), the mapping information is changed from “1” to “0” (step S86). As a result, the selector 183 enters a state of selecting the first mapping information.

  Next, the operation of the TDM frame dividing unit 167 will be described with reference to the flowchart of FIG.

  When the TDM frame is transferred from the modem unit 17, the TDM frame dividing unit 167 determines whether the mapping information change bit output from the mapping information change unit 180 is “1” as shown in the flowchart of FIG. 10. Is determined (step S101). If the mapping information change bit is “0” (No in step S101), the mapping information on the selection side is requested to the selector 183 and recorded in the mapping information storage unit selected by the selector 183. The mapping information being acquired is acquired (step S104). That is, the TDM frame received during the period in which the mapping information change bit is “0” (the period before time t2 in FIG. 7 and the period after time t4) is currently selected by the selector 183. Since it is generated based on the same mapping information as the mapping information recorded in the mapping information storage unit, the selector 183 is requested for the mapping information on the selection side.

  On the other hand, the TDM frame received during the period in which the mapping information change bit is “1” (the period from time 2 to time t4 in FIG. 7) is the mapping information storage unit that is not currently selected by the selector 183. Since it may be generated based on the mapping information before the change recorded in 181, the received TDM is checked by checking whether or not the specific bit of the overhead of the TDM frame is “1”. It is determined whether or not the frame is generated based on the updated mapping information (step S102).

  When the overhead specific bit is “1” (Yes in step S102), the received TDM frame is the mapping information after the change recorded in the mapping information storage unit 182 currently selected by the selector 183. It judges that it was produced | generated based on the same mapping information, and performs the process of step S104. On the other hand, when the overhead specific bit is “0” (No in step S102), the received TDM frame is changed in the mapping information recording unit 181 that is not currently selected by the selector 183. It is determined that the information is generated based on the same mapping information as the previous mapping information, and the process of step S103 is performed. In step S103, the mapping information on the non-selected side is requested to the selector 183, and the mapping information before update recorded in the mapping information storage unit 181 that is not selected by the selector 183 is acquired.

  Thereafter, the TDM frame decomposing unit 167 records the overhead of the TDM frame in the overhead buffer unit 169 (step S105). Further, the TDM frame decomposing unit 167 extracts TDM signals for the number of channels indicated by the mapping information acquired in step S103 or step S104 from the TDM frame, writes them in the TDM signal buffer unit 170, and then indicates the mapping information. Ethernet signals for the number of channels are extracted from the TDM frame and written to the Ethernet signal buffer unit 168.

  In the above-described embodiment, the mapping information is changed when the change time included in the mapping information change instruction is reached. However, the time until the mapping information is changed to the mapping information change instruction (change Time) is recorded, and the mapping information may be changed when the change time elapses after receiving the mapping information change instruction. In the above-described embodiment, a specific one bit of the overhead of the TDM frame is used to indicate whether or not the TDM frame is generated immediately after the mapping information is changed. You may make it show whether it was produced | generated immediately after the change of mapping information using a bit. In this embodiment, the signal mapped to the TDM frame is the TDM signal and the Ethernet signal, but the type and number of signals to be mapped are not limited to this.

[Effect of the first embodiment]
According to the present embodiment, it is possible to obtain an effect that a signal mapped to a communication frame can be normally received even in a transition period in which mapping information is changed. The reason for this is that after the mapping information is changed, the overhead specific bit of the TDM frame to be generated is set to “1” and whether the TDM frame is generated based on the mapping information before the change on the receiving side. This is because it can be determined whether it is generated based on the mapping information.

[Second embodiment of the present invention]
Referring to FIG. 11, the communication apparatus according to the second embodiment of the present invention includes a plurality of mapping information storage units 31-1 to 31-n, a selection unit 33, a mapping information change unit 34, and a frame generation. A unit 35 and a frame dividing unit 36 are provided.

  Mapping information is recorded in the mapping information storage units 31-1 to 31-n. The selection unit 33 selects one of the plurality of mapping information storage units 31-1 to 31-n. The mapping information changing unit 34 switches the selection destination of the selection unit 33 so as to select a mapping information storage unit in which mapping information having the same content is recorded at the same change timing as the communication apparatus of the communication partner.

  The frame generation unit 35 generates a communication frame in which the first type signal and the second type signal are mapped based on the mapping information recorded in the mapping information storage unit selected by the selection unit 33 To do. Note that after the change timing, a communication frame including change information indicating that the mapping information has been changed is generated after the change timing.

  When the change information is included in the communication frame received after the change timing, the frame dividing unit 36 extracts the communication frame from the communication frame based on the mapping information recorded in the mapping information storage unit selected by the selection unit 33. When the first type signal and the second type signal are distinguished and extracted, and change information is not included, the signal is recorded in the mapping information storage unit selected before the selection unit 33 switches the selection destination. Based on the mapping information, the first type signal and the second type signal are distinguished and extracted from the communication frame.

[Effect of the second embodiment]
According to the present embodiment, it is possible to obtain an effect that a signal mapped to a communication frame can be normally received even in a transition period in which mapping information is changed. The reason is that after the change timing of the mapping information, the generated communication frame includes change information indicating that the mapping information has been changed, and the received communication frame is based on the mapping before the change on the receiving side. This is because it can be determined whether the data is generated based on the mapping information after the change.

  The present invention is suitable for a communication device used in the mobile backhaul area.

DESCRIPTION OF SYMBOLS 1, 2 Wireless communication apparatus 3, 4 NMS terminal device 16 Line signal processing part 17 Modulation / demodulation part 18 Transmission / reception part 31-1 to 31-n Mapping information storage part 33 Selection part 34 Mapping information change part 35 Frame generation part 36 Frame division part 161 In-device reception unit 162 Ethernet signal buffer unit 163 TDM overhead buffer unit 164 TDM signal buffer unit 165 TDM frame generation unit 166 Mapping information management unit 167 TDM frame decomposition unit 168 Ethernet signal buffer unit 169 Overhead buffer unit 170 TDM data buffer unit 171 Intra-device transmission unit 180 Mapping information change unit 181, 182 Mapping information storage unit 183 selector

Claims (9)

A plurality of mapping information storage units in which mapping information is recorded;
A selection unit for selecting one of the plurality of mapping information storage units;
A mapping information changing unit that switches a selection destination of the selection unit so as to select a mapping information storage unit in which mapping information of the same content is recorded at the same change timing as the communication device of the communication partner;
Frame generating means for generating a communication frame mapping the first type signal and the second type signal based on the mapping information recorded in the mapping information storage unit selected by the selection unit. After the change timing, a frame generation unit that generates a communication frame including change information indicating that the mapping information has been changed;
When the change information is included in the communication frame received after the change timing, the first information is transmitted from the communication frame based on the mapping information recorded in the mapping information storage unit selected by the selection unit. If the type signal and the second type signal are distinguished and extracted, and change information is not included, the signal is recorded in the mapping information storage unit selected before the selection unit switches the selection destination. A communication apparatus comprising: a frame dividing unit that distinguishes and extracts the first type signal and the second type signal from the communication frame based on mapping information. The communication device according to claim 1.
The mapping information changing unit changes the mapping information recorded in the mapping information storage unit that is the selection destination of the selection unit at the change timing when receiving the mapping information change instruction including the change contents of the mapping information. A communication device characterized by being changed according to the contents. The communication device according to claim 2.
The mapping information changing unit stores the mapping information recorded in the mapping information storage unit selected by the selection unit when the predetermined time has elapsed from the change timing, and the mapping information storage not selected by the selection unit Copy to any one of the units, and after the copy is completed, change the selection destination of the selection unit to the mapping information storage unit to which the mapping information is copied,
The frame generation unit generates a communication frame that does not include change information after the selection destination of the selection unit is changed after copying is completed,
After the predetermined time has elapsed from the change timing, the frame dividing unit determines the first type from the communication frame based on the mapping information recorded in the mapping information storage unit selected by the selection unit . And a second type of signal are distinguished and extracted. The communication device according to any one of claims 1 to 3,
The mapping information indicates a ratio of a first type signal and a second type signal accommodated in a communication frame;
The first type of signal is a TDM signal;
The second type of signal is an Ethernet signal;
The communication frame includes a TDM overhead and a data part to which a TDM signal and an Ethernet signal are mapped. The communication device according to claim 2 or 3 ,
The mapping information change instruction further includes information indicating a change timing of mapping information, and is sent from a management terminal device. A management terminal device, a transmission device, and a reception device;
The management terminal device transmits a mapping information change instruction including a change content and change timing of mapping information to the transmission device and the reception device,
The transmitter is
A plurality of transmission side mapping information storage units in which mapping information is recorded;
A transmission side selection unit that selects one of the plurality of transmission side mapping information storage units;
A transmission side mapping information changing unit that switches a selection destination of the transmission side selection unit so as to select a transmission side mapping information storage unit in which transmission side mapping information of the same content is recorded at the same change timing as the reception device; ,
Transmission for generating a communication frame in which the first type signal and the second type signal are mapped based on the mapping information recorded in the transmission side mapping information storage unit selected by the transmission side selection unit A transmission side frame generation unit that generates a communication frame including change information indicating that the mapping information has been changed after the change timing,
The receiving device is:
A plurality of receiving-side mapping information storage units in which mapping information is recorded;
A receiving side selection unit that selects one of the plurality of receiving side mapping information storage units;
A receiving side mapping information changing unit that switches a selection destination of the receiving side selecting unit so as to select a receiving side mapping information storing unit in which mapping information of the same content is recorded at the same change timing as the transmitting device;
When change information is included in the communication frame received after the change timing, from the communication frame based on the mapping information recorded in the reception side mapping information storage unit selected by the reception side selection unit If the first type signal and the second type signal are distinguished and extracted, and change information is not included, the receiving side mapping selected before the receiving side selection unit switches the selection destination A reception-side frame dividing unit that distinguishes and extracts the first type signal and the second type signal from the communication frame based on mapping information recorded in an information storage unit; Communication system. A plurality of mapping information storage units in which mapping information is recorded;
A selection unit for selecting one of the plurality of mapping information storage units;
A mapping information changing unit that switches a selection destination of the selection unit so as to select a mapping information storage unit in which mapping information of the same content is recorded at the same change timing as the communication device of the communication partner;
If there are changes on the communication frame received after the change timing, based on the mapping information recorded in the mapping information storage unit that is selected by the selection unit, the communication frame or we first When the type signal and the second type signal are distinguished and taken out and change information is not included, the mapping recorded in the mapping information storage unit selected before the selection unit switches the selection destination A receiving apparatus comprising: a frame dividing unit that distinguishes and extracts the first type signal and the second type signal from the communication frame based on information. A communication method executed by a computer including a plurality of mapping information storage units in which mapping information is recorded, a selection unit, a mapping information change unit, a frame generation unit, and a frame division unit,
The selection unit selects one of the plurality of mapping information storage units;
The mapping information change unit switches the selection destination of the selection unit so as to select a mapping information storage unit in which the same mapping information is recorded at the same change timing as the communication apparatus of the communication partner,
The frame generation unit generates a communication frame obtained by mapping the first type signal and the second type signal based on the mapping information recorded in the mapping information storage unit selected by the selection unit. Frame generating means for generating a communication frame including change information indicating that the mapping information has been changed after the change timing;
When the frame division unit includes change information in the communication frame received after the change timing, the communication is performed based on the mapping information recorded in the mapping information storage unit selected by the selection unit. When the first type signal and the second type signal are distinguished and extracted from the frame and change information is not included, the mapping information storage selected before the selection unit switches the selection destination A communication method comprising: distinguishing and extracting the first type signal and the second type signal from the communication frame based on mapping information recorded in a unit. A program for causing a computer including a plurality of mapping information storage units in which mapping information is recorded to function as a communication device,
The computer,
A selection unit for selecting one of the plurality of mapping information storage units;
A mapping information changing unit that switches a selection destination of the selection unit so as to select a mapping information storage unit in which mapping information of the same content is recorded at the same change timing as the communication device of the communication partner,
Frame generating means for generating a communication frame mapping the first type signal and the second type signal based on the mapping information recorded in the mapping information storage unit selected by the selection unit. After the change timing, a frame generation unit that generates a communication frame including change information indicating that the mapping information has been changed,
When the change information is included in the communication frame received after the change timing, the first information is transmitted from the communication frame based on the mapping information recorded in the mapping information storage unit selected by the selection unit. If the type signal and the second type signal are distinguished and extracted, and change information is not included, the signal is recorded in the mapping information storage unit selected before the selection unit switches the selection destination. A program for functioning as a frame division unit that distinguishes and extracts the first type signal and the second type signal from the communication frame based on mapping information.

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