JP5785464B2 - Portable wireless terminal, wireless data relay transmission system - Google Patents

Description

  The present invention relates to a portable wireless terminal and a wireless data relay transmission system.

  Conventionally, as disclosed in Patent Document 1, portable terminals capable of wireless communication have been widely used. In such portable wireless terminals, when audio data is transmitted to other terminals, a bit width is increased in consideration of easy listening. As a result, the data transmission amount and the processing amount increase. In order to cover a large amount of data transmission and processing, a high-performance processing arithmetic device is used, but the cost increases accordingly.

  In addition, a portable wireless terminal is generally driven by a battery, but if a high-performance processing arithmetic device is used, limited power is consumed in a short time. As a result, there is also a problem that it cannot be used continuously for a long time. Moreover, there is a problem that communication data is lost or deteriorated when the performance of the processing arithmetic device is lowered.

Special table 2010-517364

In order to solve the above problems, a portable wireless terminal that is used as a node of a system that relays data between nodes and is driven by a battery, which is adjacent to each other at a different frequency for each terminal A transmission unit for transmitting data to the transmission unit, the transmission unit acquiring transmission data for acquiring data to be transmitted to the next portable wireless terminal, a first transmission buffer for storing data to be transmitted, and a second Data accumulation processing means for alternately performing data accumulation processing in the transmission buffer, the first transmission buffer and the second transmission buffer without interruption, and data accumulation processing in the second transmission buffer for data accumulated in the second transmission buffer Immediately after the end of the data transmission process before and after the start of the data accumulation process in the first transmission buffer, the data accumulated in the first transmission buffer is transferred to the data in the first transmission buffer. A immediately after the end of the accumulation process, we propose a data transmission processing means for transmitting processed before and after the start of the data storage processing to the second transmit buffer, and a mobile wireless terminal comprising. In addition, a wireless data relay transmission system that relays wireless data between nodes using a portable wireless terminal as a node is proposed.

According to the present invention having the above-described configuration, it is possible to perform communication with reduced omission and deterioration of communication data even with a processing arithmetic device with low performance. In addition, since it is not necessary to use a high-performance processing operation device, the battery power is not easily consumed, and the battery can be used continuously for a relatively long time. Furthermore, since the cost of the portable wireless terminal can be reduced, even a system that requires a plurality of devices can be realized relatively easily.

FIG. 3 is a diagram illustrating an example of functional blocks of the mobile wireless terminal according to the first embodiment. The figure which shows an example of the initial process performed when the power supply of a portable wireless terminal is turned ON The figure which shows an example of the timing chart of a data storage process and a data transmission process The figure which shows an example of the flow of processing when there is a transmission request 1 is a diagram illustrating an example of a specific hardware configuration of a portable wireless terminal according to a first embodiment. The figure which shows an example of the specific process at the time of acquiring the data which should be transmitted The flowchart which shows an example of the processing flow of a transmission step The figure which shows an example of the functional block of the portable radio | wireless terminal of Embodiment 2. The figure which shows an example of the initial process performed when the power supply of a portable wireless terminal is turned ON The figure which shows an example of the timing chart of an encoding data storage process, an encoding process, and an encoding data transmission process The figure which shows an example of the specific hardware constitutions of the portable wireless terminal of Embodiment 2. The figure which shows an example of the specific process when there is input of the information which should be encoded The flowchart which shows an example of the processing flow of the method of relaying data between nodes The flowchart which shows an example of the flow of a process of an encoding step The figure which shows an example of the functional block of the portable radio | wireless terminal of Embodiment 3. The figure which shows an example of the initial process performed when the power supply of a portable wireless terminal is turned ON The figure which shows an example of the timing chart of a received data storage process and a received data transmission process The figure which shows an example of the specific hardware constitutions of the portable wireless terminal of Embodiment 3. The figure which shows an example of the specific process at the time of receiving data The flowchart which shows an example of the processing flow of the method of relaying data between nodes The flowchart which shows an example of the flow of a process of a reception step The figure which shows an example of the functional block of the portable radio | wireless terminal of Embodiment 4. The figure which shows an example of the initial process performed when the power supply of a portable wireless terminal is turned ON The figure which shows an example of a timing chart of decoding data accumulation processing and decoding processing / decoding data transmission processing The figure which shows an example of the specific hardware constitutions of the portable radio | wireless terminal of Embodiment 4. The figure which shows an example of the specific process at the time of acquiring the data which should be decoded The flowchart which shows an example of the processing flow of the method of relaying data between nodes Flowchart showing an example of the processing flow of the decoding step The figure which shows an example of a wireless data relay transmission system The figure which shows the other example of a wireless data relay transmission system

  Embodiments of the present invention will be described below. The mutual relationship between the embodiment and the claims is as follows. The first embodiment mainly relates to claim 1 and the like, the second embodiment mainly relates to claim 2 and the like, the third embodiment mainly relates to claim 3 and the like, and the fourth embodiment mainly relates to claim 4 and the like. 5 mainly relates to claim 5. In addition, this invention is not limited to these embodiments at all, and can be implemented in various modes without departing from the gist thereof.

<< Embodiment 1 >>

<Overview>
The portable wireless terminal of this embodiment has two transmission buffers, and alternately performs processing for accumulating data to be transmitted in the first transmission buffer and the second transmission buffer without interruption. The data stored in the second (first) transmission buffer is immediately after the data storage process in the second (first) transmission buffer is completed, and the data storage process in the first (second) transmission buffer is performed. Transmission processing to the next portable wireless terminal before and after the start of. With this configuration, transmission data accumulation processing and transmission processing can be performed in parallel, and good communication can be performed without using a high-performance processing arithmetic device.

<Configuration>
FIG. 1 is a diagram illustrating an example of functional blocks of the portable wireless terminal according to the present embodiment. As shown in this figure, the “portable wireless terminal” 000 of the present embodiment has a “transmission unit” 010, and the transmission unit includes a “first transmission buffer” 011, a “second transmission buffer” 012, “ "Transmission data acquisition means" 013, "Data storage processing means" 014, and "Data transmission processing means" 015. Each configuration will be described below.

  A “portable wireless terminal” is used as a node of a system that relays data between nodes and is driven by a battery. Here, the node refers to each element constituting the network. Further, relaying data between nodes means transmitting data received from a certain node to another node. The type of battery stored in the portable wireless terminal is not particularly limited. For example, a dry battery, a storage battery, a solar battery, a thermal battery, etc. are mentioned.

  The “transmission unit” has a function of transmitting data to the next portable wireless terminal adjacent to each terminal at a different frequency. By using different transmission frequencies for each terminal, communication between certain terminals is less affected by communication between other terminals. For this reason, it becomes possible to relay more accurate data. Here, although the transmission frequency for each terminal may be a fixed value, it may be a value that varies depending on time and circumstances. For example, when the own transmission frequency is used by a device other than the portable wireless terminal, the frequency different from the transmission frequency of the device and other portable wireless terminal devices may be selected from a plurality of transmission frequency candidates. .

  When transmitting data to other nodes, new data may be added and transmitted, or the data may be processed and transmitted. For example, it is possible to add the ID of its own portable wireless terminal and transmit it to another portable wireless terminal. In this case, the other portable wireless terminal determines the data transmission source based on the ID of the portable wireless terminal, and when it is determined that the data is transmitted from a specific portable wireless terminal, the other portable wireless terminal It is also possible to adopt a configuration for transmitting data to the network. The data transmission destination does not have to be one portable wireless terminal, and the same data may be transmitted to a plurality of portable wireless terminals.

    The “transmission data acquisition means” has a function of acquiring data to be transmitted to the next portable wireless terminal. Here, the data received from the previous wireless portable terminal can be used as data to be transmitted to the next wireless portable terminal as it is. As a result, it is possible to relay specific data in a system having a mobile wireless terminal as a node. It is also possible to use audio data input from a microphone as data to be transmitted to the next portable wireless terminal.

  In addition to audio data, image data or text data can be transmitted. In this case, the portable wireless terminal can be provided with a display means to display an image or text. Even if the display means is not provided in the terminal itself, it can be said that it is meaningful to relay data when the display means is provided in another terminal as a relay transmission destination.

  The “first transmission buffer” and the “second transmission buffer” have a function of accumulating data to be transmitted. The capacities of the first transmission buffer and the second transmission buffer are not particularly limited, but as an example, a capacity of several KB may be considered.

  The “data storage processing means” has a function of alternately performing data storage processing on the first transmission buffer and the second transmission buffer without interruption. Here, the switching of the data accumulation processing between the first transmission buffer and the second transmission buffer can also be performed when the data capacity of the first transmission buffer or the second transmission buffer runs out (when it becomes full). However, it can also be performed when the remaining data capacity becomes a predetermined value or less. The transmission buffer that initially stores data may be any, but may be determined by an initial process that is executed when the power is turned on. FIG. 2 is a diagram illustrating an example of an initial process executed when the power of the portable wireless terminal is turned on. In the example of this figure, in step S0201, the first transmission buffer is set as the transmission data storage destination.

  The “data transmission processing means” transmits the data stored in the second transmission buffer immediately after the completion of the data storage processing in the second transmission buffer and before and after the start of the data storage processing in the first transmission buffer. Then, the data stored in the first transmission buffer is transmitted immediately after the end of the data storage process in the first transmission buffer and before and after the start of the data storage process in the second transmission buffer.

  FIG. 3 is a diagram illustrating an example of a timing chart of the data accumulation process and the data transmission process. As shown in this figure, while the data for transmission is accumulated in the transmission buffer, the data accumulated in another transmission buffer is wirelessly transmitted. With this configuration, it is possible to transmit data to other portable wireless terminals in parallel even when data for transmission is being accumulated.

  In addition, it is not always necessary to transmit the data immediately after receiving the data from the previous portable wireless terminal. When there is a transmission request through the operation button, the data is received from the portable wireless terminal corresponding to the previous node and is nonvolatile. It is also possible to transmit data stored in the memory. In addition, when there is a transmission request from the portable wireless terminal corresponding to the next node via the wireless communication means, the data received from the portable wireless terminal corresponding to the previous node and stored in the nonvolatile memory may be transmitted. . FIG. 4 is a diagram illustrating an example of the flow of processing when there is a transmission request. In the example of this figure, the received data is stored in a non-volatile memory. First, in step S0401, it is determined whether there is data to be transmitted to the nonvolatile memory. For example, it is determined whether there is data to be newly transmitted in addition to already transmitted data, or it is determined whether the data specified in the transmission request exists in the nonvolatile memory. Next, if it is determined in step S0402 that there is data to be transmitted, the data is stored in the first transmission buffer or the second transmission buffer. It is also possible to adopt a configuration in which the data is deleted after the data is transmitted. In this case, it is only necessary to determine whether or not the data exists in the nonvolatile memory.

<Specific hardware configuration>
FIG. 5 is a diagram illustrating an example of a specific hardware configuration of the portable wireless terminal according to the present embodiment. As shown in this figure, the portable wireless terminal includes a “CPU” 101, a “DMA controller” 102, a “transmission buffer controller” 110, a “first transmission buffer” 111, a “second transmission buffer” 112, and an “encoding buffer controller”. 120, “encode buffer” 121, “receive buffer controller” 130, “receive buffer” 131, “decode buffer controller” 140, “decode buffer” 141, “wireless controller” 150, “wireless interface” 151, “wireless transmission” Device ”152,“ microphone interface ”160,“ microphone ”161,“ nonvolatile memory controller ”170,“ nonvolatile memory ”171,“ speaker interface ”180,“ speaker ”181, and the like. Although not shown in the figure, a memory arbiter is also provided.

  The “CPU” 101 encodes audio data input via the “microphone interface” 160 and decodes reception data input via the “wireless interface” 151. The “DMA controller” 102 transmits the audio data input via the “microphone interface” 160 to the “encode buffer” 102 without passing through the “CPU” 101, or is stored in the “decode buffer” 141. Audio data is transmitted to the “speaker interface” 180 without passing through the “CPU” 101.

  The “transmission buffer controller” 110 alternately performs processing for accumulating data to be transmitted in the “first transmission buffer” 111 and the “second transmission buffer” 112 without interruption. Further, the “encode buffer controller” 120 receives information to be encoded from the “microphone interface” 160 or the like and stores it in the “encode buffer” 121. The “reception buffer controller” 130 accumulates data received via the “wireless interface” 151 in the “reception buffer” 131. Further, the “decode buffer controller” 140 receives information to be decoded from the “nonvolatile memory” 171 and stores the information in the “decode buffer” 141. The “wireless controller” 150 transmits the data to be transmitted stored in the “first transmission buffer” 111 and the “second transmission buffer” 112 to the “wireless interface” 151. Further, the “wireless controller” 150 transmits the reception data input from the “wireless interface” 151 to the “reception buffer controller” 130. Furthermore, the “wireless interface” 151 controls the “wireless transmitter” 152 to transmit data to the next portable wireless terminal adjacent to each other at a different frequency for each terminal. Further, the “nonvolatile memory controller” 170 accumulates the reception data accumulated in the “reception buffer” 131 in the “nonvolatile memory” 171.

<Specific processing>
FIG. 6 is a diagram illustrating an example of specific processing when the mobile wireless terminal according to the present exemplary embodiment acquires data to be transmitted. First, in step S1, data to be transmitted is transferred to the first transmission buffer. Next, in step S2, it is determined whether the first transmission buffer is full (whether the data capacity is exhausted). If the determination here is not full, the process proceeds to step S3C. If the determination here is full, the process proceeds to step S3A and step S3B. In step S3C, it is determined whether data to be transmitted is still being acquired. Here, if it is being acquired, the process returns to step S1, and if it is not being acquired, the process proceeds to step S4C to wirelessly transmit the data stored in the first transmission buffer.

  In step S3A, the data stored in the first transmission buffer is wirelessly transmitted. In step S3B, the data transfer destination is switched from the first transmission buffer to the second transmission buffer, and the data is transferred to the second transmission buffer. In step S4B, it is determined whether the second reception buffer is full. If the determination here is not full, the process proceeds to step S5C. If the determination here is full, the process proceeds to step S5A and step S5B. In step S5C, it is determined whether data to be transmitted is still being acquired. If acquisition is in progress, the process returns to step S3B. If acquisition is not in progress, the process proceeds to step S6C to wirelessly transmit the data stored in the second transmission buffer.

  In step S5B, the data stored in the second transmission buffer is wirelessly transmitted. In step S5A, the data transfer destination is switched from the second transmission buffer to the first transmission buffer, and the data is transferred to the first transmission buffer. In step S6A, it is determined whether the first reception buffer is full. If the determination here is not full, the process proceeds to step S7C. If the determination here is full, the process returns to step S3A and step S3B. In step S7C, it is determined whether data to be transmitted is still being acquired. If it is being acquired, the process returns to step S5A. If it is not being acquired, the process proceeds to step S8C to wirelessly transmit the data stored in the first transmission buffer.

<Process flow>
FIG. 7 is a flowchart illustrating an example of a processing flow of a transmission step in a method of relaying data between nodes using a mobile wireless terminal driven by a battery as a node. First, in substep SS0701, data to be transmitted to the next portable wireless terminal is acquired (transmission data acquisition substep). Next, in sub-step SS0702, the data accumulation process in the first transmission buffer and the second transmission buffer for accumulating data to be transmitted is alternately performed without interruption (data accumulation sub-step). Next, in sub-step SS0703, the data accumulated in the second transmission buffer is immediately after the end of the data accumulation process in the second transmission buffer and before and after the start of the data accumulation process in the first transmission buffer. The data transmitted to the portable wireless terminal and stored in the first transmission buffer immediately after the end of the data storage process of the first transmission buffer and before and after the start of the data storage process to the second transmission buffer Transmit to portable wireless terminal (data transmission sub-step). In the data transmission sub-step, data is transmitted to the next portable wireless terminal adjacent to each terminal at a different frequency.

<Effect>
The portable wireless terminal according to the present embodiment makes it possible to perform communication with reduced omission and deterioration of communication data even with a processing arithmetic device that does not have high performance. Further, since it is not necessary to use a high-performance processing operation device, power is not easily consumed, and it can be used continuously for a relatively long time.

<< Embodiment 2 >>

<Overview>
The portable wireless terminal of the present embodiment has two encode buffers, and alternately performs processing for accumulating signals constituting information to be encoded in the first encode buffer and the second encode buffer without interruption. Further, the signal accumulated in the second (first) encode buffer is immediately after the signal accumulation process in the second (first) encode buffer, and the signal accumulation process in the first (second) encode buffer. Encode using the CPU before and after the start of. Further, the generated data of the second (first) encode buffer is transmitted to the transmission unit before starting the next signal accumulation process to the second (first) encode buffer. By adopting such a configuration, it is possible to perform storage processing of data to be encoded, encoding processing, and transmission processing of encoded data in parallel, and good communication can be performed without using a high-performance processing arithmetic device. It becomes possible.

<Configuration>
FIG. 8 is a diagram illustrating an example of functional blocks of the portable wireless terminal according to the present embodiment. As shown in this figure, the “portable wireless terminal” 000 of this embodiment has a “transmission unit” 010 and an “encoding unit” 020, and the “encoding unit” 020 includes a “first encoding buffer” 021 and “ “Second encoding buffer” 022, “Encoding information acquisition means” 023, “Signal storage processing means” 024, “Encoding means” 025, and “Encoding data transmission processing means” 026. Although omitted in FIG. 8, the “transmitting unit” 010 has the configuration described in FIG. Hereinafter, the configuration of the encoding unit will be described.

  The “encoding information acquisition unit” has a function of acquiring information to be encoded. Here, the encoding includes processing for compressing digital data, processing for converting digital data into a format for wireless transmission, and the like in addition to processing for converting from analog to digital. Examples of information to be encoded include audio information, image information, text information, and the like.

  For example, consider a case where audio data is compressed. Since human voice data contains frequencies up to 4 kHz, the Nyquist frequency is 8 kHz. Further, in order to prevent the frequency information from dropping much at the stage of pulse code modulation (PCM), the width of the quantization bit needs to be at least 16 bits. If data is transmitted as it is, the communication amount becomes 128 kbps, which is technically difficult for a small portable wireless terminal. Therefore, it is conceivable to compress 16-bit data into 4-bit data by ADPCM encoding the audio data. As a result, the amount of communication can be reduced to 32 kbps, and it becomes easier to transmit audio data in real time.

  The “first encoding buffer” and the “second encoding buffer” have a function of accumulating signals constituting information to be encoded. The capacities of the first encode buffer and the second encode buffer are not particularly limited, but as an example, a capacity of several KB may be considered.

  The “signal storage unit” has a function of alternately performing signal storage processing on the first encode buffer and the second encode buffer without interruption. Here, switching of the signal storage processing between the first encode buffer and the second encode buffer can also be performed when the data capacity of the first encode buffer or the second encode buffer runs out (when it becomes full). However, it can also be performed when the remaining data capacity becomes a predetermined value or less. Any encoding buffer that initially stores signals may be used, but may be determined by an initial process that is executed when the power is turned on. FIG. 9 is a diagram illustrating an example of an initial process executed when the power of the portable wireless terminal is turned on. In the example of this figure, the first encoding buffer is set as the data storage destination to be encoded in step S0901, and the first transmission buffer is set as the data storage destination to be transmitted in step S0902.

  The “encoding means” uses the CPU to store the signal stored in the second encode buffer immediately after the signal storage process in the second encode buffer is finished and before and after the start of the signal storage process in the first encode buffer. The signal stored in the first encode buffer is encoded using the CPU immediately after the signal accumulation process in the first encode buffer is completed and before and after the signal accumulation process in the second encode buffer is started. It has the function to do.

  "Encode data transmission processing means" transmits the data of the second encoding buffer generated by the encoding means to the transmission unit before starting the next signal accumulation processing to the second encoding buffer, and generates by the encoding means The first encoding buffer data is transmitted to the transmission unit before starting the next signal accumulation processing to the first encoding buffer.

  FIG. 10 is a diagram illustrating an example of a timing chart of signal accumulation processing, encoding processing, and encoded data transmission processing. As shown in this figure, while the signals constituting the information to be encoded are stored in one encode buffer, the signals stored in the other encode buffers are encoded and transmitted to the transmission unit. As shown in this figure, the time required to store the information to be encoded in the encode buffer is the time required to encode the signal stored in the encode buffer and transmit it to the transmitter. The same applies to the case where the time required to store the information to be encoded in the encoding buffer is short, although generally longer.

<Hardware configuration>
FIG. 11 is a diagram illustrating an example of a specific hardware configuration of the mobile wireless terminal according to the present embodiment. Basically, it is the same as the hardware configuration of the portable wireless terminal of the first embodiment shown in FIG. 5, but in this embodiment, a “first encode buffer” 121 and a “second encode buffer” 122 are provided. It is characterized by being. The “encode buffer controller” 120 receives information to be encoded from the “microphone interface” 160 or the like, and alternately performs signal accumulation processing in the “first encode buffer” 121 and the “second encode buffer” 122 without interruption. The “DMA controller” 102 transmits the audio data input via the “microphone interface” 160 to the “first encoding buffer” 121 or the “second encoding buffer” 122 without passing through the “CPU” 101. To do.

<Specific processing>
FIG. 12 is a diagram illustrating an example of specific processing when information to be encoded is input by the portable wireless terminal of the present embodiment. First, in step S1, data to be encoded is transferred to the first transmission buffer. Next, in step S2, it is determined whether the first encode buffer is full (whether the data capacity is exhausted). If the determination here is not full, the process proceeds to step S3C. If the determination here is full, the process proceeds to step S3A and step S3B. In step S3C, it is determined whether data to be encoded is still being input. If the input is in progress, the process returns to step S1. If the input is not in progress, the process proceeds to step S4C. The data stored in the first encode buffer is encoded and transmitted to the transmission buffer controller.

  In step S3A, the data fully stored in the first encode buffer is encoded and transmitted to the transmission buffer controller. In step S3B, the data transfer destination is switched from the first encode buffer to the second encode buffer, and the data is transferred to the second encode buffer. In step S4B, it is determined whether the second encoding buffer is full. If the determination here is not full, the process proceeds to step S5C. If the determination here is full, the process proceeds to step S5A and step S5B. In step S5C, it is determined whether data to be encoded is still being input. If the input is being performed, the process returns to step S3B. If the input is not being performed, the process proceeds to step S6C, and the data stored in the second encode buffer is encoded and transmitted to the transmission buffer controller.

  In step S5B, the data fully stored in the second encode buffer is encoded and transmitted to the transmission buffer controller. In step S5A, the data transfer destination is switched from the second encode buffer to the first encode buffer, and the data is transferred to the first encode buffer. In step S6A, it is determined whether the first encoding buffer is full. If the determination here is not full, the process proceeds to step S7C. If the determination here is full, the process returns to step S3A and step S3B. In step S7C, it is determined whether data to be encoded is still being input. If the input is being performed, the process returns to step S5A. If the input is not being performed, the process proceeds to step S8C, where the data stored in the first encode buffer is encoded and transmitted to the transmission buffer controller.

<Process flow>
FIG. 13 is a flowchart illustrating an example of a processing flow of a method of relaying data between nodes using a mobile wireless terminal driven by a battery as a node. As shown in this figure, the relay transmission method of this embodiment includes an “encoding step” S1301 and a “transmission step” S1302. “Transmission step” S1302 is the same as that described in FIG.

  FIG. 14 is a flowchart illustrating an example of the processing flow of the encoding step. First, in sub-step SS1401, information to be encoded (compressed) is acquired (encoding information acquisition sub-step). Next, in sub-step SS1402, signal accumulation processing in the first encode buffer and the second encode buffer for accumulating signals constituting information to be encoded (compressed) is alternately performed without interruption (signal accumulation sub-step). Next, in sub-step SS1403, the CPU stores the signal accumulated in the second encode buffer immediately after the completion of the signal accumulation process in the second encode buffer and before and after the start of the signal accumulation process in the first encode buffer. The CPU uses the signal encoded and accumulated in the first encode buffer immediately after the completion of the signal accumulation process in the first encode buffer and before and after the start of the signal accumulation process in the second encode buffer. To encode (Encoding Substep). Next, in sub-step SS1404, the data of the second encoding buffer generated in the encoding sub-step is transmitted to the first transmission buffer or the second transmission buffer before the next signal accumulation processing to the second encoding buffer is started. Then, the data of the first encoding buffer generated by the encoding means is transmitted to the first transmission buffer or the second transmission buffer before starting the next signal accumulation processing to the first encoding buffer (encoded data transmission sub-step ).

<Effect>
The portable wireless terminal according to the present embodiment makes it possible to perform communication with reduced omission and deterioration of communication data even with a processing arithmetic device that does not have high performance. Further, since it is not necessary to use a high-performance processing operation device, power is not easily consumed, and it can be used continuously for a relatively long time.

<< Embodiment 3 >>

<Overview>
The portable wireless terminal of this embodiment receives data from the previous portable wireless terminal that is adjacent to each other at a different frequency. And it has two receiving buffers, and the process which accumulate | stores the received data in a 1st receiving buffer and a 2nd receiving buffer is performed alternately without interruption. In addition, the data stored in the second (first) reception buffer is stored immediately after the data storage process in the second (first) reception buffer is completed. Before and after the start of transmission. By adopting such a configuration, it is possible to perform storage processing of data to be encoded, encoding processing, and transmission processing of encoded data in parallel, and good communication can be performed without using a high-performance processing arithmetic device. It becomes possible.

<Configuration>
FIG. 15 is a diagram illustrating an example of functional blocks of the portable wireless terminal according to the present embodiment. As shown in this figure, the “portable wireless terminal” 000 of the present embodiment has a “transmission unit” 010, a “reception unit” 030, and a “nonvolatile memory” 070. 1 reception buffer ”031,“ second reception buffer ”032,“ data reception means ”033,“ reception data storage processing means ”034, and“ reception data transmission processing means ”035. Although omitted in FIG. 15, the “transmission unit” 010 has the configuration described in FIG. 1. Hereinafter, the configuration of the receiving unit will be described.

  The “data receiving means” receives data from the previous portable wireless terminal. Further, the “data receiving means” has a function of receiving data from the previous portable wireless terminal adjacent to each other at a different frequency. By using a different reception frequency for each terminal, communication between certain terminals is less affected by communication between other terminals. For this reason, it becomes possible to relay more accurate data. Here, although the reception frequency for each terminal may be a fixed value, it may be a value that varies depending on time and circumstances. For example, when the reception frequency of the device itself is used by a device other than the portable wireless terminal, the frequency different from the reception frequency of the device and other portable wireless terminal devices may be selected from a plurality of reception frequency candidates. .

  The “first reception buffer” and the “second reception buffer” have a function of accumulating received data. The capacities of the first receiving buffer and the second receiving buffer are not particularly limited, but as an example, a capacity of several KB can be considered.

  The “reception data storage processing means” has a function of alternately performing data storage processing in the first reception buffer and the second reception buffer without interruption. Here, the switching of the data accumulation processing between the first reception buffer and the second reception buffer can also be performed when the data capacity of the first reception buffer or the second reception buffer runs out (when it becomes full). However, it can also be performed when the remaining data capacity becomes a predetermined value or less. The reception buffer that initially stores the reception data may be any, but may be determined by an initial process that is executed when the power is turned on. FIG. 16 is a diagram illustrating an example of an initial process executed when the power of the portable wireless terminal is turned on. In the example of this figure, the first reception buffer is set as the storage destination of received data in step S1601, and the first transmission buffer is set as the storage destination of data to be transmitted in step S1602.

  The “reception data transmission processing means” stores the data stored in the second reception buffer in a nonvolatile manner immediately after the end of the data storage processing in the second reception buffer and before and after the start of the data storage processing in the first reception buffer. The data stored in the first receiving buffer is transferred to the non-volatile memory immediately after the end of the data storing process in the first receiving buffer and before and after the start of the data storing process in the second receiving buffer. It has a function for transmission processing.

  FIG. 17 is a diagram illustrating an example of a timing chart of received data accumulation processing and received data transmission processing. As shown in this figure, while the received data is stored in one receive buffer, the data stored in the other receive buffer is transmitted to the nonvolatile memory. With this configuration, it is possible to transmit the received data stored in parallel when the received data is stored in the reception buffer to the nonvolatile memory. As shown in this figure, the time required to store the received data in the reception buffer is generally more than the time required to transmit the data stored in the reception buffer to the nonvolatile memory. The same applies to the case where the time required to transmit the data stored in the reception buffer to the nonvolatile memory is longer.

<Hardware configuration>
FIG. 18 is a diagram illustrating an example of a specific hardware configuration of the mobile wireless terminal according to the present embodiment. Basically, it is the same as the hardware configuration of the portable wireless terminal of the first embodiment shown in FIG. 5, but in this embodiment, a “first reception buffer” 131 and a “second reception buffer” 132 are provided. It is characterized by being. The “reception buffer controller” 120 alternately performs processing of accumulating data received via the “wireless interface” 151 in the “first reception buffer” 131 and the “second reception buffer” 132 without interruption. Further, the “nonvolatile memory controller” 170 receives the data stored in the “second reception buffer” 132 immediately after the end of the data storage processing in the “second reception buffer” 132, and the “first reception buffer”. Immediately before the end of the data storage process in the “first reception buffer” 131, the data stored in the “first reception buffer” 131 is transferred to the “nonvolatile memory” 171 before and after the start of the data storage process in the 131. Therefore, the data is transmitted to the “nonvolatile memory” 171 before and after the data storage processing to the “second reception buffer” 132 is started. The “wireless interface” 151 controls the “wireless transmitter” 152 to receive data from the previous portable wireless terminal adjacent to each other at a different frequency.

<Specific processing>
FIG. 19 is a diagram illustrating an example of specific processing when the mobile wireless terminal according to the present embodiment receives data from the mobile wireless terminal that is the previous node. First, in step S1, the reception data is transferred to the first reception buffer. Next, in step S2, it is determined whether the first reception buffer is full (whether the data capacity is exhausted). If the determination here is not full, the process proceeds to step S3C. If the determination here is full, the process proceeds to step S3A and step S3B. In step S3C, it is determined whether data is still being received. Here, if it is being received, the process returns to step S1, and if it is not being received, the process proceeds to step S4C to transmit the data stored in the first reception buffer to the transmission buffer controller.

  In step S3A, the data fully stored in the first reception buffer is transmitted to the reception buffer controller. In step S3B, the data transfer destination is switched from the first reception buffer to the second reception buffer, and the data is transferred to the second reception buffer. In step S4B, it is determined whether the second reception buffer is full. If the determination here is not full, the process proceeds to step S5C. If the determination here is full, the process proceeds to step S5A and step S5B. In step S5C, it is determined whether data is still being received. If reception is in progress, the process returns to step S3B. If reception is not in progress, the process proceeds to step S6C, and the data stored in the second reception buffer is transmitted to the transmission buffer controller.

  In step S5B, the data fully stored in the second reception buffer is transmitted to the transmission buffer controller. In step S5A, the data transfer destination is switched from the second reception buffer to the first reception buffer, and the data is transferred to the first reception buffer. In step S6A, it is determined whether the first reception buffer is full. If the determination here is not full, the process proceeds to step S7C. If the determination here is full, the process returns to step S3A and step S3B. In step S7C, it is determined whether data is still being received. If reception is in progress, the process returns to step S5A. If reception is not in progress, the process proceeds to step S8C, and the data stored in the first reception buffer is transmitted to the transmission buffer controller.

<Process flow>
FIG. 20 is a flowchart illustrating an example of a processing flow of a method of relaying data between nodes using a mobile wireless terminal driven by a battery as a node. As shown in this figure, the relay transmission method of the present embodiment includes a “reception step” S2001 and a “transmission step” S2002. “Transmission step” S2002 is the same as that described in FIG.

  FIG. 21 is a flowchart illustrating an example of the processing flow of the reception step. First, in substep SS2101, data is received from the previous portable wireless terminal (data reception substep). Next, in sub-step SS2102, data accumulation processing in the first reception buffer and second reception buffer for accumulating received data is alternately performed without interruption (reception data accumulation sub-step). Next, in sub-step SS2103, the data stored in the second reception buffer is stored in the non-volatile memory immediately after the end of the data storage process in the second reception buffer and before and after the start of the data storage process in the first reception buffer. The data stored in the first reception buffer is transmitted to the non-volatile memory immediately after the end of the data storage process in the first reception buffer and before and after the start of the data storage process in the second reception buffer ( Receive data transmission substep). In the reception data transmission sub-step, data is received from the previous portable wireless terminal adjacent to each other at a different frequency.

<Effect>
The portable wireless terminal according to the present embodiment makes it possible to perform communication with reduced omission and deterioration of communication data even with a processing arithmetic device that does not have high performance. Further, since it is not necessary to use a high-performance processing operation device, power is not easily consumed, and it can be used continuously for a relatively long time.

<< Embodiment 4 >>

<Overview>
The portable wireless terminal of this embodiment has two decode buffers, and alternately performs data accumulation processing on the data to be decoded in the first decode buffer and the second decode buffer without interruption. Further, the data stored in the second (first) decode buffer is immediately after the data storage process in the second (first) decode buffer, and the data stored in the first (second) decode buffer. Decode using the CPU before and after the start of. Then, the generated data of the second (first) decode buffer is transmitted to the output device before starting the next data storage process to the second (first) decode buffer. By adopting such a configuration, it is possible to perform accumulation processing of data to be decoded, decoding processing, and transmission processing of decoded data in parallel, and good communication can be performed without using a high-performance processing arithmetic device. It becomes possible.

<Configuration>
FIG. 22 is a diagram illustrating an example of functional blocks of the portable wireless terminal according to the present embodiment. As shown in this figure, the “portable wireless terminal” 000 of the present embodiment has a “transmission unit” 010, a “reception unit” 030, a “decoding unit” 040, and a “nonvolatile memory” 050. Section 040 includes “first decode buffer” 041, “second decode buffer” 042, “decode data receiving means” 043, “decoded data storage processing means” 044, “decode means” 045, Decode data transmission processing means "046 is provided. Although omitted in FIG. 22, the “transmitting unit” 010 has the configuration described in FIG. 1, and the “receiving unit” 030 has the configuration described in FIG. Hereinafter, the configuration of the decoding unit will be described.

  The “decoded data acquisition means” has a function of acquiring data to be decoded from the nonvolatile memory. Here, the decoding includes processing for restoring encrypted data, processing for decompressing compressed data, and the like. Examples of information to be decoded include compressed audio information, image information, and text information.

  The “first decode buffer” and “second decode buffer” have a function of storing data to be decoded. The capacities of the first decoding buffer and the second decoding buffer are not particularly limited, but as an example, a capacity of several KB can be considered.

  The “decoded data storage means” has a function of alternately performing data storage processing in the first decode buffer and the second decode buffer without interruption. Here, the switching of the data storage process between the first decode buffer and the second decode buffer can be performed when the data capacity of the first decode buffer or the second decode buffer runs out (when it becomes full). However, it can also be performed when the remaining data capacity becomes a predetermined value or less. Any decoding buffer that stores data to be decoded first may be used, but may be determined by an initial process executed when the power is turned on. FIG. 23 is a diagram illustrating an example of an initial process executed when the power of the portable wireless terminal is turned on. In the example of this figure, the first decoding buffer is set as a storage destination of data to be decoded.

  The “decoded data transmission processing means” transmits the data of the second decoding buffer generated by the decoding means to the output device before starting the next data accumulation processing to the second decoding buffer, and generates it by the decoding means. The first decode buffer data is transmitted to the output device before starting the next data accumulation process in the first decode buffer.

  FIG. 24 is a diagram illustrating an example of a timing chart of decoded data accumulation processing, decoding processing, and decoded data transmission processing. As shown in this figure, while the data to be decoded is stored in one decode buffer, the data stored in the other decode buffer is decoded and transmitted to the output device. As shown in this figure, the time required to store the data to be decoded in the decode buffer is the time required to decode the data stored in the decode buffer and transmit it to the output device. The same applies to the case where the time required to store the data to be decoded in the decode buffer is short, although generally longer.

  An output buffer may be further provided between the output device and the decode buffer. The output buffer receives the decode data from the decode buffer and transmits it to the output device. Also, it is possible to provide a first output buffer and a second output buffer as output buffers. In this case, while one output buffer is receiving the decoded data from the decode buffer, the decoding data stored in the other output buffer is transmitted to the output device. With this configuration, it is possible to perform data transmission processing between the decode buffer and the output device more efficiently.

<Hardware configuration>
FIG. 25 is a diagram illustrating an example of a specific hardware configuration of the mobile wireless terminal according to the present embodiment. Basically, it is the same as the hardware configuration of the portable wireless terminal shown in FIGS. 11 and 19, but in this embodiment, a “first decode buffer” 141 and a “second decode buffer” 142 are provided. It is characterized by that. The “decode buffer controller” 120 alternately performs data accumulation processing on the “first decode buffer” 141 and the “second decode buffer” 142 for the data to be decoded read from the “nonvolatile memory” 171 without interruption. In addition, the “CPU” 101 transfers the data stored in the “second decode buffer” 142 to the “first decode buffer” 141 immediately after the data storage process in the “second decode buffer” 142 ends. The data decoded before and after the start of the data accumulation process and accumulated in the “first decode buffer” 141 is immediately after the end of the data accumulation process in the “first decode buffer” 141, and the “second decode buffer” 142 Decode before and after the start of data storage processing. Further, the “DMA controller” 102 transmits the data in the “second decode buffer” 142 to the “speaker interface” 180 before starting the next data storage process to the “second decode buffer” 142, The data in the “decode buffer” 141 is transmitted to the “speaker interface” 180 before starting the next data accumulation process after “to the first decode buffer” 141. The decoded data transmitted to the “speaker interface” 180 is output as audio through the “speaker” 181.

<Specific processing>
FIG. 26 is a diagram illustrating an example of specific processing when the mobile wireless terminal according to the present embodiment acquires data to be decoded. First, in step S1, data to be decoded is transferred to the first decoding buffer. Next, in step S2, it is determined whether the first decode buffer is full (whether the data capacity is exhausted). If the determination here is not full, the process proceeds to step S3C. If the determination here is full, the process proceeds to step S3A and step S3B. In step S3C, it is determined whether data to be decoded is still being acquired. Here, if it is being acquired, the process returns to step S1, and if it is not being acquired, the process proceeds to step S4C, where the data stored in the first decode buffer is decoded and transmitted to the output device.

  In step S3A, the data fully stored in the first decode buffer is decoded and transmitted to the output device. In step S3B, the transfer destination of the data to be decoded is switched from the first decode buffer to the second decode buffer, and the data is transferred to the second decode buffer. In step S4B, it is determined whether the second decode buffer is full. If the determination here is not full, the process proceeds to step S5C. If the determination here is full, the process proceeds to step S5A and step S5B. In step S5C, it is determined whether data to be decoded is still being acquired. If it is being acquired, the process returns to step S3B. If it is not being acquired, the process proceeds to step S6C, where the data stored in the second decode buffer is decoded and transmitted to the output device.

  In step S5B, the data fully stored in the second decode buffer is decoded and transmitted to the output device. In step S5A, the transfer destination of the data to be decoded is switched from the second decode buffer to the first decode buffer, and the data is transferred to the first decode buffer. In step S6A, it is determined whether the first decode buffer is full. If the determination here is not full, the process proceeds to step S7C. If the determination here is full, the process returns to step S3A and step S3B. In step S7C, it is determined whether data to be decoded is still being acquired. Here, if it is being acquired, the process returns to step S5A, and if it is not being acquired, the process proceeds to step S8C, where the data stored in the first decode buffer is decoded and transmitted to the output device.

<Process flow>
FIG. 27 is a flowchart illustrating an example of a processing flow of a method of relaying data between nodes using a mobile wireless terminal driven by a battery as a node. As shown in this figure, the relay transmission method of the present embodiment includes a “reception step” S2701, a “transmission step” S2702, and a “decode step” S2703. “Transmission step” S2702 is the same as that described in FIG. 7 of the first embodiment, and “Reception step” S2703 is the same as that described in FIG. 21 of the third embodiment.

  FIG. 28 is a flowchart illustrating an example of the processing flow of the decoding step. First, in sub-step SS2801, data to be decoded is acquired from the nonvolatile memory (decoded data acquisition sub-step). Next, in sub-step SS2802, data storage processing in the first decode buffer and the second decode buffer for storing data to be decoded is alternately performed without interruption (decoded data storage sub-step). Next, in sub-step SS2803, the data stored in the second decode buffer is used immediately after the end of the data storage process in the second decode buffer and before and after the start of the data storage process in the first decode buffer. The data stored in the first decode buffer is decoded using the CPU immediately after the end of the data storage process in the first decode buffer and before and after the start of the data storage process in the second decode buffer. Decode (decode substep). Next, in sub-step SS2804, the data of the second decoding buffer generated in the decoding sub-step is transmitted to the output device before starting the next data accumulation processing in the second decoding buffer, and generated in the decoding sub-step. The processed data of the first decode buffer is transmitted to the output device before starting the next data accumulation process to the first decode buffer (decoded data transmission sub-step).

<Effect>
The portable wireless terminal according to the present embodiment makes it possible to perform communication with reduced omission and deterioration of communication data even with a processing arithmetic device that does not have high performance. Further, since it is not necessary to use a high-performance processing operation device, power is not easily consumed, and it can be used continuously for a relatively long time.

<< Embodiment 5 >>

<Overview>
The invention of this embodiment is a wireless data relay transmission system that relays wireless data between nodes using the portable wireless terminal described in the first to fourth embodiments as a node. Even if the portable wireless terminal described in the first to fourth embodiments is a processing arithmetic device that does not have high performance, it is possible to perform communication while suppressing loss and deterioration of communication data.

<System configuration 1>
FIG. 29 is a diagram illustrating an example of a wireless data relay transmission system. The system of this figure has a configuration in which “wireless portable terminals” 200 are arranged at a plurality of points in a marathon event and the like, and audio data is relayed in the order from “start point” 201S to “goal point” 201G. . By adopting such a configuration, it is sufficient to have a transmission output level that transmits voice data to at least the wireless portable terminal of the adjacent node, and it is possible to suppress power consumption.

<System configuration 2>
FIG. 30 is a diagram illustrating another example of the wireless data relay transmission system. In the system of this figure, a “portable wireless terminal” 200 is arranged in each vehicle that does not fit in the “train inspection laboratory” 300, and voice data transmitted from the “wireless unit” 301 in the “inspection laboratory” 300 is The relay is transmitted to the mobile wireless terminal of the vehicle located at a position away from the “inspection place” 300. With this configuration, it is possible to receive the audio data from the “inspection station” 300 and confirm the audio content even in a vehicle at a position away from the “inspection station” 300. In the vehicle in the “inspection station” 300, the content is confirmed by sound transmitted from the “wired unit” 302 and output via the “inspection speaker” 303.

<System configuration 3>
As another example, in a building such as a high-rise condominium or a radio tower, a portable wireless terminal is arranged at a predetermined height, and placed from a portable wireless terminal placed at a lower level to a higher level. It is also possible to adopt a configuration in which audio data is relay-transmitted toward the mobile radio terminal that has been placed, and conversely, from a mobile radio terminal that is placed at a higher level to a mobile radio terminal that is placed at a lower level It is also possible to relay audio data.

<Effect>
Since the wireless data relay transmission system of this embodiment uses the portable wireless terminal described in the first to fourth embodiments, even if a plurality of portable wireless terminals are used in the system, the overall cost is suppressed. It becomes possible.

000 ... mobile wireless terminal, 000N ... next mobile wireless terminal, 000P ... previous mobile wireless terminal 011 ... first transmission buffer, 012 ... second transmission buffer, 013 ... transmission data acquisition means, 014 ... data storage processing means, 015 Data transmission processing unit 020 Encoding unit 021 First encoding buffer 022 Second encoding buffer 023 Encoding information acquisition unit 024 Signal accumulation processing unit 025 Encoding unit 026 Encoding data transmission processing Means, 030... Receiving unit, 031... First receiving buffer, 032... Second receiving buffer, 033... Data receiving unit, 034... Received data accumulating processing unit, 035. 1st decoding buffer, 042 ... 2nd decoding buffer, 043 ... decoding Data acquisition means, 044 ... decode data storage means, 045 ... decode means, 046 ... decode data transmission means, 060 ... input device, 070 ... nonvolatile memory, 080 ... output device, 101 ... CPU, 102 ... DMA controller, 110 ... Transmission buffer controller, 111 ... (first) transmission buffer, 112 ... second transmission buffer, 120 ... (first) encoding buffer, 122 ... second encoding buffer, 130 ... reception buffer controller, 131 ... (first) reception buffer , 132 ... second reception buffer, 140 ... decode buffer controller, 141 ... (first) decode buffer, 142 ... second decode buffer, 150 ... radio controller, 151 ... radio interface, 152 ... radio transmitter, 160 ... microphone interface 1 61 ... Microphone, 170 ... Non-volatile memory controller, 171 ... Non-volatile memory, 180 ... Speaker interface, 181 ... Speaker, 200 ... Portable wireless terminal, 201S ... Start point, 201G ... Goal point, 300 ... Inspection station, 301 ... Wireless Unit, 302 ... Wired unit

Claims (5)

It is a portable wireless terminal that is used as a node of a system that relays data between nodes and is driven by a battery.
A transmitter that transmits data to the next portable wireless terminal adjacent to each terminal at a different frequency;
A transmission unit for acquiring data to be transmitted to the next portable wireless terminal;
A first transmission buffer and a second transmission buffer for storing data to be transmitted;
Data accumulation processing means for alternately performing data accumulation processing in the first transmission buffer and the second transmission buffer without interruption;
The data accumulated in the second transmission buffer is transmitted immediately after the data accumulation process in the second transmission buffer is completed and before and after the data accumulation process in the first transmission buffer is started, and accumulated in the first transmission buffer. Data transmission processing means for performing transmission processing immediately after the end of data storage processing of the first transmission buffer and before and after the start of data storage processing in the second transmission buffer;
Equipped with a,
The mobile radio terminal is a time for storing data in the first transmission buffer and the second transmission buffer, which is longer than the transmission processing time of data stored in each of these buffers . Encoding information acquisition means for acquiring information to be encoded;
A first encode buffer and a second encode buffer for storing signals constituting information to be encoded;
Signal accumulation processing means for alternately performing signal accumulation processing in the first encode buffer and the second encode buffer without interruption;
The signal accumulated in the second encode buffer is encoded using the CPU immediately after the signal accumulation process in the second encode buffer is finished and before and after the signal accumulation process in the first encode buffer is started. Encoding means for encoding the signal stored in the encode buffer using the CPU immediately after the signal storage process in the first encode buffer is completed and before and after the start of the signal storage process in the second encode buffer;
The data of the second encoding buffer generated by the encoding means is transmitted to the transmission unit before starting the next signal accumulation process to the second encoding buffer, and the data of the first encoding buffer generated by the encoding means is Encoded data transmission processing means for performing transmission processing to the transmission unit before starting the next signal accumulation processing to the first encoding buffer;
Further have the encoding unit comprising,
The portable wireless terminal according to claim 1, wherein the data accumulation processing time in the first encode buffer and the second encode buffer is longer than the time for encoding the data accumulated in the respective buffers. . It further has a receiver for receiving data from the previous portable wireless terminal adjacent to each terminal at a different frequency,
The receiver
Data receiving means for receiving data from the previous portable wireless terminal;
A first reception buffer and a second reception buffer for storing received data;
Received data storage processing means for alternately performing data storage processing in the first reception buffer and the second reception buffer without interruption;
The data stored in the second reception buffer is transmitted to the non-volatile memory immediately after the end of the data storage process in the second reception buffer and before and after the start of the data storage process in the first reception buffer. Received data transmission processing means for transmitting data accumulated in the reception buffer to the nonvolatile memory immediately after the end of the data accumulation processing in the first reception buffer and before and after the start of the data accumulation processing in the second reception buffer; ,
Further have a receiving unit comprising,
The data storage processing time in the first reception buffer and the second reception buffer is longer than the transmission processing time of the data stored in each of these buffers to the nonvolatile memory. 2. The portable wireless terminal according to 2. Decode data acquisition means for acquiring data to be decoded from the nonvolatile memory;
A first decode buffer and a second decode buffer for storing data to be decoded;
Decode data storage means for alternately performing data storage processing in the first decode buffer and the second decode buffer without interruption,
The data stored in the second decode buffer is decoded using the CPU immediately after the end of the data storage process in the second decode buffer and before and after the start of the data storage process in the first decode buffer. Decoding means for decoding data stored in the decode buffer using the CPU immediately after the end of the data storage process in the first decode buffer and before and after the start of the data storage process in the second decode buffer;
The data of the second decoding buffer generated by the decoding means is transmitted to the output device before starting the next data accumulation processing to the second decoding buffer, and the data of the first decoding buffer generated by the decoding means is Decoding data transmission processing means for performing transmission processing to the output device before starting the next data accumulation processing to the first decode buffer;
Further have a decoding unit comprising,
The portable radio terminal according to claim 3, wherein the data accumulation processing time in the first decode buffer and the second decode buffer is longer than the time for decoding the data accumulated in the respective buffers. .   A wireless data relay transmission system for relaying wireless data between nodes using the portable wireless terminal according to any one of claims 1 to 4 as a node.

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