WO2015162776A1 - 通信システム及び通信装置 - Google Patents
通信システム及び通信装置 Download PDFInfo
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- WO2015162776A1 WO2015162776A1 PCT/JP2014/061683 JP2014061683W WO2015162776A1 WO 2015162776 A1 WO2015162776 A1 WO 2015162776A1 JP 2014061683 W JP2014061683 W JP 2014061683W WO 2015162776 A1 WO2015162776 A1 WO 2015162776A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/22—Arrangements affording multiple use of the transmission path using time-division multiplexing
- H04L5/225—Arrangements affording multiple use of the transmission path using time-division multiplexing combined with the use of transition coding
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
- H04L25/40—Transmitting circuits; Receiving circuits
- H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
- H04L25/493—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems by transition coding, i.e. the time-position or direction of a transition being encoded before transmission
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L2001/0092—Error control systems characterised by the topology of the transmission link
- H04L2001/0094—Bus
Definitions
- Non-Patent Document 1 A method is known in which data transmitted from a plurality of communication devices is transmitted through one shared transmission line (see Non-Patent Document 1).
- FDMA frequency division multiplexing
- TDMA time division multiplexing
- CDMA code division multiplexing
- the conventional multiplexing technique has a problem that it is difficult to start or continue communication when the communication environment deteriorates or the communication distance is increased.
- a communication system in which one transmission path is shared by a plurality of communication devices, and each of the plurality of communication devices repeats one packet at a cycle of its own communication device until a predetermined condition is satisfied.
- a communication system comprising: a transmission unit that transmits a signal; and a reception unit that integrates a signal on the transmission path with a period of another communication device until a predetermined condition is satisfied.
- communication can be started or continued even if the communication environment deteriorates or the communication distance is increased.
- FIG. 1 is a schematic diagram illustrating a configuration example of a communication system according to a first embodiment. It is a conceptual diagram which shows a mode that the packet repeated with the period T is distinguished and extracted from the noise containing the packet repeated with another period by integrating the signal on a transmission line with the period T.
- FIG. 1 is a schematic diagram illustrating functions of a communication device according to a first embodiment.
- FIG. 1 is a schematic diagram illustrating a configuration example of a communication system according to the first embodiment.
- the communication system 1 according to the first embodiment is a communication system in which one transmission line L is shared by a plurality of communication devices 10 to 40, and each of the plurality of communication devices 10 to 40 is A transmission unit that repeatedly transmits one packet to the transmission line L at a cycle of the communication device (eg, cycle T1 if the communication device 10) until a predetermined condition is satisfied; And a receiving unit that integrates in a cycle of another communication device (for example, at least one cycle of cycles T2, T3, and T4 in the case of the communication device 10) until the condition is satisfied.
- a cycle of the communication device eg, cycle T1 if the communication device
- a receiving unit that integrates in a cycle of another communication device (for example, at least one cycle of cycles T2, T3, and T4 in the case of the communication device 10) until the condition is satisfied.
- each packet transmitted from the plurality of communication apparatuses 10 to 40 can be amplified without any upper limit (amplitude amplification) while individually distinguishing between the packets. Communication can be started or continued even if the distance (distance between communication devices) increases.
- a communication system in which a communication distance (distance between communication devices) is not fixed for example, communication is started by approaching a ticket gate, and communication is performed even if the ticket gate is separated from the communication device.
- a station ticket gate system that can be continued that can be continued.
- a communication network in which the communication environment and the communication distance are likely to change for example, a network in which a number of wireless devices with sensors are arranged in a space to collect data, installed in a city Wireless communication spots
- a communication network in which the communication environment and the communication distance are likely to change for example, a network in which a number of wireless devices with sensors are arranged in a space to collect data, installed in a city Wireless communication spots
- the transmission path L is shared by a plurality of communication devices 10-40.
- the type of the transmission line L is not limited.
- the transmission line L may be a wireless transmission line or a wired transmission line. Transmission of the transmission line L can be performed using, for example, an optical signal, an electric signal, a sound signal, or the like.
- Communication devices 10 to 40 The types of communication devices 10 to 40 are not limited. Examples of the communication devices 10 to 40 include NFC (Near Field Communication) communication terminals, sensor network communication terminals, public wireless terminals, mobile phones, smartphones, and the like. Further, the communication method of the plurality of communication devices 10 to 40 is not limited. For example, the plurality of communication devices 10 to 40 may perform communication using a master / slave method or may perform communication using a peer-to-peer method.
- NFC Near Field Communication
- Each of the plurality of communication devices 10 to 40 includes a transmission unit and a reception unit.
- Each of the plurality of communication devices 10 to 40 includes a transmission unit that repeatedly transmits one packet to the transmission line L at a cycle of the own communication device until a predetermined condition is satisfied.
- the communication device 10 repeatedly transmits one packet P1 to the transmission line L at a cycle T1 until a predetermined condition is satisfied, and the communication device 20 transmits one packet P2 at a cycle T2 until the predetermined condition is satisfied.
- the communication apparatus 30 repeatedly transmits one packet P3 to the transmission line L at a period T3 until a predetermined condition is satisfied, and the communication apparatus 40 satisfies the predetermined condition with the one packet P4. Until it is repeatedly sent to the transmission line L at a cycle T4.
- One packet P1, P2, P3, P4 sent from each of the plurality of communication devices 10 to 40 may have the same content or may be different from each other. After the predetermined condition is satisfied, each of the plurality of communication apparatuses 10 to 40 repeats, for example, one packet different from the previously sent one packet at the cycle of the own communication apparatus until the predetermined condition is satisfied. Send to transmission line L.
- the predetermined condition examples include, for example, that another communication apparatus has correctly received the packet of its own communication apparatus and that the number of repetitions has reached a predetermined number. Whether or not the other communication device has correctly received the packet of the own communication device is determined by, for example, an error detection code (eg, CRC: Cyclic Redundancy Check, parity bit) in the response packet received from the other communication device. be able to.
- the predetermined condition may be the same among the plurality of communication devices 10 to 40 or may be different.
- the period refers to a predetermined time interval, and each of the plurality of communication devices 10 to 40 repeats one packet so that the time width from the leading end P to the terminal end Q of the one packet matches this time interval.
- one packet P1, P2, P3, P4 sent from each of the plurality of communication devices 10 to 40 is repeated in each cycle T1, T2, T3, T4.
- the time width from the leading end P to the end Q of the packet can be changed by changing the number of bits constituting the packet or the time width of one bit.
- the method for assigning the period of the own communication device is not limited.
- the periods T1, T2, T3, and T4 may be assigned in advance to each of the plurality of communication devices 10 to 40, and these may be stored in the storage means provided in each.
- a plurality of cycles T1, T2, T3, and T4 are stored in advance in storage means included in each of the plurality of communication devices 10 to 40, and each of the plurality of communication devices 10 to 40 is stored.
- One period may be selected at random from the plurality of periods T1, T2, T3, and T4.
- one cycle may be selected at random from a plurality of cycles.
- the period assigned to each of the plurality of communication apparatuses 10 to 40 is preferably a combination in which the least common multiple of these periods is larger. In this way, it is possible to increase the number of integrations while individually distinguishing each packet transmitted from the plurality of communication devices 10 to 40.
- each of the plurality of communication apparatuses 10 to 40 is assigned a period of period T1, period T2, period T3, and period T4 (T1 ⁇ T2 ⁇ T3 ⁇ T4).
- Each of the plurality of communication devices 10 to 40 includes a signal on the transmission line L (a signal on the transmission line L is composed of a plurality of symbols. One symbol may be composed of 1 bit, In this embodiment, a case where each of a plurality of symbols constituting a signal on the transmission line L is composed of one bit is taken as an example.)
- a receiving unit that integrates in a cycle of another communication device (for example, at least one cycle of cycles T2, T3, and T4 in the case of the communication device 10) is provided.
- the signals on the transmission line L are separated by a time interval having a length equal to the period of the other communication device, and the separated signals are superimposed on each other.
- the predetermined condition for example, it is possible to correctly receive a packet from another communication device.
- Whether or not a packet has been correctly received from another communication device can be determined by, for example, an error detection code (eg, CRC: cyclic redundancy check, parity bit) in the packet extracted by integration.
- CRC cyclic redundancy check, parity bit
- Each of the plurality of communication devices 10 to 40 only needs to be able to perform integration in at least one cycle of other communication devices.
- the communication device 10 only needs to be able to integrate at least one of the periods T2, T3, and T4, and the communication device 20 is at least one of the periods T1, T3, and T4.
- the communication device 30 can integrate with at least one of the cycles T1, T2, and T4, and the communication device 40 has the cycles T1, T2, and T3. It is only necessary that the integration can be performed in at least one of the periods.
- FIG. 2A to 2F are conceptual diagrams showing how a packet repeated at a period T is integrated with a signal on a transmission line at a period T to be distinguished and extracted from noise including a packet repeated at another period. It is. As shown in FIG. 2A, since there are packets that are repeated at various periods on the transmission line L, packets that are repeated at the period T are repeated at other periods as long as the number of integrations at the period T is small. It cannot be distinguished from the noise (the part shown in gray) that contains the packets that are received. However, as shown in FIG. 2A ⁇ FIG.
- a packet repeated in the cycle T is amplified (amplitude) as the number of integrations in the cycle T is increased, and eventually, in other cycles, as shown in FIG. 2F.
- the amplitude becomes larger than the noise (the portion shown in gray) including the repeated packet, and is extracted separately from the noise. Since there is no limit on the number of integrations, a packet repeated in the cycle T can be amplified (amplitude amplification) without an upper limit by increasing the number of integrations.
- FIG. 3 is a schematic diagram illustrating functions of the communication apparatus according to the first embodiment. As illustrated in FIG. 3, the communication apparatus according to the first embodiment includes a transmission unit 100 and a reception unit 200. Hereinafter, it demonstrates in order.
- the transmission unit 100 includes an antenna unit 110, a modulation unit 120, a DA conversion unit 130, a repetition unit 140, an encoder 150 unit, an error detection code generation unit 160, and a buffer unit 170.
- the transmission unit 100 may include an error correction code generation unit in addition to the error detection code generation unit 160.
- the operation of the transmission unit 100 will be described.
- the bit string temporarily stored on the buffer unit 170 is output to the error detection code generation unit 160.
- the error detection code generation unit 160 adds an error detection code to the bit string output from the buffer unit 170 and outputs this to the encoding unit 150.
- the encoding unit 150 adds a synchronization bit sequence, a packet identification bit sequence, and the like to the bit sequence output from the error detection code generation unit 160, and outputs this to the repetition unit 140 as a single packet.
- the repeater 140 repeatedly outputs one packet output from the encoder 150 to the DA converter 130.
- the DA conversion unit 130 converts one packet (digital signal) output from the repetition unit 140 into an analog signal and outputs the analog signal to the modulation unit 120.
- Modulation section 120 modulates the carrier wave using the analog signal output from DA conversion section 130, and transmits this to transmission path L from antenna section 110.
- the repeating unit 140 includes a selector S and registers A1 to AN.
- the selector S is connected to either the encoding unit 150 or the register AN.
- the number of registers A is assumed to be equal to the number of bits (N, where N is an integer equal to or greater than 1) of a packet transmitted from the communication apparatus.
- N is an integer equal to or greater than 1
- the repeater 140 may be realized by hardware or software. Hereinafter, the operation of the repeating unit 140 will be described.
- the repetition unit 140 resets and initializes the registers A1 to AN.
- the repetition unit 140 stores N bits constituting one packet output from the encoding unit 150 in the registers A1 to AN, respectively. Specifically, when the first bit constituting one packet is output from the encoding unit 150, the repetition unit 140 outputs this bit to the DA conversion unit 130 and stores it in the register A1.
- the repetition unit 140 outputs this bit to the DA conversion unit 130 and also stores the first bit stored in the register A1. Are moved to the register A2, and the second bit output from the encoding unit 150 is stored in the register A1.
- the repetition unit 140 outputs this bit to the DA conversion unit 130 and also stores the first bit stored in the register A2. Are moved to the register A3, the second bit stored in the register A1 is moved to the register A2, and then the third bit output from the encoding unit 150 is stored in the register A1.
- the repetition unit 140 repeats the above processing until the Nth bit constituting one packet is output from the encoding unit 150.
- the repetition unit 140 connects the selector S to the register AN after the Nth bit constituting the packet is output from the encoding unit 150, and outputs the bit stored in the register AN to the DA converter 130.
- repeating section 140 moves each bit stored in registers A1 to A (N-1) to registers A2 to AN, and further stores the bits output to DA converter 130 in resist A1. By repeating the above processing, the repeating unit 140 repeatedly outputs N bits constituting one packet to the DA converter 130.
- the reception unit 200 includes an antenna unit 210, a demodulation unit 220, an AD conversion unit 230, an integration unit 240, a decoding unit 250, an error detection code check unit 260, a buffer unit 270, and a synchronization unit 280. I have.
- the receiving unit 200 may include an error correction unit in addition to the error detection code checking unit 260. Hereinafter, the operation of the receiving unit 200 will be described.
- a signal on the transmission line L received by the antenna unit 210 is input to the demodulation unit 220.
- the demodulator 220 demodulates the signal output from the antenna unit 210 and outputs the demodulated signal to the AD converter 230.
- the AD conversion unit 230 converts the signal output from the demodulation unit 220 into a digital signal (that is, a bit string) and outputs the digital signal to the integration unit 240.
- the integration unit 240 integrates the bit string output from the AD conversion unit 230 and outputs it to the decoding unit 250.
- the decoding unit 250 attempts to detect a synchronization bit sequence, a packet identification bit sequence, and the like from the bit sequence output from the integration unit 240.
- the decoding unit 250 extracts one packet from the bit string output from the integration unit 240 using the detection result, and extracts the packet from the error detection code checking unit 260 and the synchronization unit 280. Output.
- the error detection code checking unit 260 performs error detection on the bit string output from the decoding unit 250 and outputs it to the buffer unit 270.
- the buffer unit 270 temporarily stores the bit string output from the error detection code checking unit 260.
- the synchronization unit 280 synchronizes the movement of each unit with the bit string output from the integration unit 240 using the bit string output from the integration unit 240.
- the integrating unit 240 includes an adding unit C and registers B1 to BN.
- the adding unit C adds the output of the register BN to the bit (signal) output from the AD conversion unit 230 and outputs the addition result to the decoding unit 250.
- Each of the registers B1 to BN has a capacity enough to store the addition result.
- the number of registers B is equal to or greater than the number of bits of a packet output from another communication device. When the number of bits of a packet output from another communication device is known in advance, the same number of registers B1 to BN as the number of bits (N) of a packet output from another communication device can be used. .
- the number of registers B is set from another communication device.
- the number of bits of the packet to be output (N) may be increased and dummy bits may be stored in a surplus register (“number of registers B” ⁇ “number of bits constituting the packet”).
- the number of bits of a packet output from another communication device may be stored in advance in the integration unit 240 or may be input to the integration unit 240 from the outside.
- Each communication device only needs to include one or more integration units 240, but may include the same number of integration units 240 as the number of other communication devices (three in the first embodiment). In the present embodiment, it is assumed that the number of integrating units 240 is one for the sake of simplification of description.
- the integration unit 240 may be realized by hardware or software. Hereinafter, the operation of the integration unit 240 will be described.
- the integrator 240 resets and initializes the registers B1 to BN.
- the integration unit 240 stores this in the register B1.
- the integration unit 240 moves the first bit stored in the register B1 to the register B2, and is output from the AD conversion unit 230.
- the second bit is stored in register B1.
- the integration unit 240 moves the first bit stored in the register B2 to the register B3, and then stores the first bit in the register B1.
- the second bit is moved to the register B2, and the third bit output from the AD conversion unit 230 is stored in the register B1.
- the integration unit 240 After the N + 1th bit is output from the AD conversion unit 230, the integration unit 240 adds the value stored in the register BN to the bit and stores the value in the registers B1 to B (N ⁇ 1). Each value is moved to the registers B2 to BN, and the addition result is stored in the resist B1.
- the integration unit 240 repeats the above processing to integrate the bit string output from the AD conversion unit 230 (a bit string obtained by AD conversion of the signal on the transmission path) at a cycle of another communication device until a predetermined condition is satisfied. To do.
- the integrator 240 resets the registers B1 to BN when a predetermined condition is satisfied.
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Abstract
Description
図1は実施形態1に係る通信システムの構成例を示す模式図である。図1に示すように、実施形態1に係る通信システム1は、一の伝送路Lが複数の通信装置10~40により共有された通信システムであって、複数の通信装置10~40の各々は、一のパケットを所定の条件が満たされるまで自通信装置の周期(例:通信装置10であれば周期T1)で繰り返し伝送路Lへ送出する送信部と、伝送路L上の信号を所定の条件が満たされるまで他の通信装置の周期(例:通信装置10であれば周期T2、T3、及びT4のうちの少なくとも1つの周期)で積分する受信部と、を備える通信システムである。
伝送路Lは複数の通信装置10~40により共有される。伝送路Lの種類は限定されない。伝送路Lは、無線伝送路であってもよいし、有線伝送路であってもよい。伝送路Lの伝送は、例えば、光信号、電気信号、音信号などを用いて行うことができる。
通信装置10~40の種類は限定されない。通信装置10~40の一例としては、例えば、NFC(Near Field Communication)通信端末、センサーネットワーク通信端末、公衆無線端末、携帯電話、スマートフォンなどを挙げることができる。また、複数の通信装置10~40の通信方式は限定されない。例えば、複数の通信装置10~40は、マスタースレーブ方式で通信を行ってもよいし、ピアツーピア方式で通信を行ってもよい。
複数の通信装置10~40の各々は、一のパケットを所定の条件が満たされるまで自通信装置の周期で繰り返し伝送路Lへ送出する送信部を備えている。本実施形態では、通信装置10は一のパケットP1を所定の条件が満たされるまで周期T1で繰り返し伝送路Lへ送出し、通信装置20は一のパケットP2を所定の条件が満たされるまで周期T2で繰り返し伝送路Lへ送出し、通信装置30は一のパケットP3を所定の条件が満たされるまで周期T3で繰り返し伝送路Lへ送出し、通信装置40は一のパケットP4を所定の条件が満たされるまで周期T4で繰り返し伝送路Lへ送出するものとする。複数の通信装置10~40の各々から送出される一のパケットP1、P2、P3、P4は、互いに同じ内容であってもよいし異なっていてもよい。複数の通信装置10~40の各々は、所定の条件が満たされた後、例えば、先に送出した一のパケットとは異なる一のパケットを所定の条件が満たされるまで自通信装置の周期で繰り返し伝送路Lへ送出する。
複数の通信装置10~40の各々は、伝送路L上の信号(伝送路L上の信号は複数のシンボルにより構成される。1つのシンボルは1ビットで構成されていてもよいし、複数のビットで構成されていてもよい。本実施形態では、伝送路L上の信号を構成する複数のシンボルの各々が1つのビットで構成されている場合を一例として採り上げている。)を所定の条件が満たされるまで他の通信装置の周期(例:通信装置10であれば周期T2、T3、及びT4のうちの少なくとも1つの周期)で積分する受信部を備えている。これにより、伝送路L上の信号が他の通信装置の周期に等しい長さの時間間隔で区切られ、区切られた信号が互いに重ね合わされる。例えば、伝送路L上の信号が「11(-1)1(-1)1・・・」(1ビットの時間幅=1ms)であって他の通信装置の周期が「2ms」であるとすると、3回の積分により、「11」、「(-1)1」、「(-1)1」・・・が互いに重ね合わせられ、「(-1)3」という積分結果が得られる。また、例えば、伝送路L上の信号が「3(-1)(-1)2(-4)1・・・」(1ビットの時間幅=2ms)であって他の通信装置の周期が「1.9ms」であるとすると、3回の積分により、「3(-1)」、「(-1)2」、「(-4)1」・・・が互いに重ね合わせられ、「(-2)2」という積分結果が得られる。
図2A~図2Fは、伝送路上の信号を周期Tで積分していくことにより周期Tで繰り返されるパケットが他の周期で繰り返されるパケットを含んだノイズから区別されて取り出される様子を示す概念図である。図2Aに示すように、伝送路L上には様々な周期で繰り返されるパケットが存在しているため、周期Tでの積分回数が少ないうちは、周期Tで繰り返されるパケットを他の周期で繰り返されるパケットを含んだノイズ(灰色で示した部分)から区別して取り出すことができない。しかしながら、図2A→図2Eに示すように、周期Tで繰り返されるパケットは、周期Tでの積分回数を増やしていくと増幅(振幅)され、やがて、図2Fに示すように、他の周期で繰り返されるパケットを含んだノイズ(灰色で示した部分)より振幅が大きくなり当該ノイズから区別して取り出される。積分回数に制限はないため、周期Tで繰り返されるパケットは、積分回数を増やすことにより上限なく増幅(振幅増幅)することができる。
送信部100は、アンテナ部110と、変調部120と、DA変換部130と、繰り返し部140と、エンコーダ150部と、誤り検出符号生成部160と、バッファ部170と、を備えている。送信部100は、誤り検出符号生成部160に加えて誤り訂正符号生成部を備えていてもよい。以下、送信部100の動作を説明する。
繰り返し部140は、セレクタSと、レジスタA1~ANと、を有している。セレクタSは、エンコード部150かレジスタANかのいずれかに接続される。レジスタAの数は自通信装置から送出されるパケットのビット数(N個。Nは1以上の整数)に等しいものとする。自通信装置から送出されるパケットのビット数は、例えば、繰り返し部140において予め記憶させておいてもよいし、外部から繰り返し部140に入力してもよい。繰り返し部140はハードウェアで実現されてもよいしソフトウェアで実現されてもよい。以下、繰り返し部140の動作を説明する。
受信部200は、アンテナ部210と、復調部220と、AD変換部230と、積分部240と、デコード部250と、誤り検出符号検査部260と、バッファ部270と、同期部280と、を備えている。受信部200は、誤り検出符号検査部260に加えて誤り訂正部を備えていてもよい。以下、受信部200の動作を説明する。
積分部240は、加算部Cと、レジスタB1~BNと、を有している。加算部Cは、AD変換部230から出力されるビット(信号)にレジスタBNの出力を加算し、加算結果をデコード部250に出力する。レジスタB1~BNは、それぞれ加算結果を格納できるだけの容量を有している。レジスタBの数は他の通信装置から出力されるパケットのビット数以上とされる。他の通信装置から出力されるパケットのビット数が予め明らかである場合は、他の通信装置から出力されるパケットのビット数(N個)と同じ数のレジスタB1~BNを使用することができる。また、他の通信装置から出力されるパケットのビット数が予め明らかでない場合や様々なビット数から構成されるパケットに対応できるようにする場合などにおいては、レジスタBの数を他の通信装置から出力されるパケットのビット数(N個)よりも多くして、余ったレジスタ(「レジスタBの数」-「パケットを構成するビット数」)にダミービットを格納することにしてもよい。他の通信装置から出力されるパケットのビット数は、例えば、積分部240において予め記憶させておいてもよいし、外部から積分部240に入力してもよい。各通信装置は、1つ以上の積分部240を備えていればよいが、他の通信装置の数(実施形態1であれば3つ)と同じ数の積分部240を備えていてもよい。本実施例では、説明の簡略化のため、積分部240の数が1つであるものとする。積分部240はハードウェアで実現されてもよいしソフトウェアで実現されてもよい。以下、積分部240の動作を説明する。
10 通信装置
20 通信装置
30 通信装置
40 通信装置
100 送信部
110 アンテナ部
120 変調部
130 DA変換部
140 繰り返し部
150 エンコード部
160 誤り検出部
170 バッファ部
200 受信部
210 アンテナ部
220 復調部
230 AD変換部
240 積分部
250 デコード部
260 誤り検出部
270 バッファ部
A1~AN レジスタ
B1~BN レジスタ
C 加算部
L 伝送路
P 一のパケットの先端
Q 一のパケットの終端
S セレクタ
T 周期
Claims (6)
- 一の伝送路が複数の通信装置により共有された通信システムであって、
前記複数の通信装置の各々は、
一のパケットを所定の条件が満たされるまで自通信装置の周期で繰り返し前記伝送路へ送出する送信部と、
前記伝送路上の信号を所定の条件が満たされるまで他の通信装置の周期で積分する受信部と、
を備えることを特徴とする通信システム。 - 前記伝送路上の信号は複数のシンボルにより構成され、前記複数のシンボルの各々は1つのビットにより構成されていることを特徴とする請求項1に記載の通信システム。
- 前記伝送路上の信号は複数のシンボルにより構成され、前記複数のシンボルの各々は複数のビットにより構成されていることを特徴とする請求項1に記載の通信システム。
- 一の伝送路を他の通信装置と共有する通信装置であって、
一のパケットを所定の条件が満たされるまで自通信装置の周期で繰り返し前記伝送路へ送出する送信部と、
前記伝送路上の信号を所定の条件が満たされるまで他の通信装置の周期で積分する受信部と、
を備えることを特徴とする通信装置。 - 前記伝送路上の信号は複数のシンボルにより構成され、前記複数のシンボルの各々は1つのビットにより構成されていることを特徴とする請求項4に記載の通信装置。
- 前記伝送路上の信号は複数のシンボルにより構成され、前記複数のシンボルの各々は複数のビットにより構成されていることを特徴とする請求項4に記載の通信装置。
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CN201480077081.3A CN106105072B (zh) | 2014-04-25 | 2014-04-25 | 通信系统及通信装置 |
EP14890031.9A EP3136634A4 (en) | 2014-04-25 | 2014-04-25 | Communication system and communication equipment |
PCT/JP2014/061683 WO2015162776A1 (ja) | 2014-04-25 | 2014-04-25 | 通信システム及び通信装置 |
JP2016514658A JP6347527B2 (ja) | 2014-04-25 | 2014-04-25 | 通信システム及び通信装置 |
US15/306,364 US10148410B2 (en) | 2014-04-25 | 2014-04-25 | Communication system and communication device |
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PCT/JP2014/061683 WO2015162776A1 (ja) | 2014-04-25 | 2014-04-25 | 通信システム及び通信装置 |
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US (1) | US10148410B2 (ja) |
EP (1) | EP3136634A4 (ja) |
JP (1) | JP6347527B2 (ja) |
CN (1) | CN106105072B (ja) |
WO (1) | WO2015162776A1 (ja) |
Citations (2)
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JPS6424536A (en) * | 1987-07-20 | 1989-01-26 | Yamatake Honeywell Co Ltd | Multiplex radio transmitting method |
EP2490340A1 (en) * | 2009-10-16 | 2012-08-22 | Quadrac Co., Ltd. | Wireless communication system, transmitter apparatus, receiver apparatus, receiving method, and transmitting method |
Family Cites Families (12)
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US5844952A (en) * | 1993-05-19 | 1998-12-01 | Ntt Mobile Communications Network Inc. | Time diversity receiver |
KR100735406B1 (ko) * | 2000-06-23 | 2007-07-04 | 삼성전자주식회사 | 부호분할 다중접속 시스템의 핸드오프 단말기의 순방향링크 데이터 서비스 장치 및 방법 |
KR100434459B1 (ko) * | 2000-06-27 | 2004-06-05 | 삼성전자주식회사 | 이동통신 시스템에서 패킷의 전송 제어방법 및 장치 |
US7210077B2 (en) * | 2004-01-29 | 2007-04-24 | Hewlett-Packard Development Company, L.P. | System and method for configuring a solid-state storage device with error correction coding |
US7512077B2 (en) * | 2005-09-01 | 2009-03-31 | Network Equipment Technologies, Inc. | Compensation for independent clocks in relayed communication over packet-based networks |
US7894490B2 (en) * | 2005-12-07 | 2011-02-22 | Nippon Telegraph And Telephone Corporation | Signal separating circuit, signal separating method, signal multiplexing circuit and signal multiplexing method |
JP4947353B2 (ja) * | 2006-12-26 | 2012-06-06 | ソニー株式会社 | 信号処理装置および信号処理方法、並びにプログラム |
EP2000810B1 (en) * | 2007-06-07 | 2013-09-04 | Mitsubishi Electric Information Technology Centre Europe B.V. | Determination of sine wave period |
US8751907B2 (en) * | 2010-09-14 | 2014-06-10 | King Saud University | Joint encoding and decoding methods for improving the error rate performance |
US8937994B2 (en) * | 2012-06-25 | 2015-01-20 | Rambus Inc. | Partial response decision feedback equalizer with selection circuitry having hold state |
US9036764B1 (en) * | 2012-12-07 | 2015-05-19 | Rambus Inc. | Clock recovery circuit |
US8923445B1 (en) * | 2013-08-29 | 2014-12-30 | L-3 Communications Corp. | Complex symbol de-mapping using sectoring |
-
2014
- 2014-04-25 WO PCT/JP2014/061683 patent/WO2015162776A1/ja active Application Filing
- 2014-04-25 JP JP2016514658A patent/JP6347527B2/ja active Active
- 2014-04-25 US US15/306,364 patent/US10148410B2/en not_active Expired - Fee Related
- 2014-04-25 EP EP14890031.9A patent/EP3136634A4/en not_active Withdrawn
- 2014-04-25 CN CN201480077081.3A patent/CN106105072B/zh not_active Expired - Fee Related
Patent Citations (2)
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JPS6424536A (en) * | 1987-07-20 | 1989-01-26 | Yamatake Honeywell Co Ltd | Multiplex radio transmitting method |
EP2490340A1 (en) * | 2009-10-16 | 2012-08-22 | Quadrac Co., Ltd. | Wireless communication system, transmitter apparatus, receiver apparatus, receiving method, and transmitting method |
Non-Patent Citations (1)
Title |
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See also references of EP3136634A4 * |
Also Published As
Publication number | Publication date |
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JP6347527B2 (ja) | 2018-06-27 |
CN106105072B (zh) | 2018-11-02 |
CN106105072A (zh) | 2016-11-09 |
EP3136634A4 (en) | 2017-12-06 |
JPWO2015162776A1 (ja) | 2017-04-13 |
EP3136634A1 (en) | 2017-03-01 |
US20170048056A1 (en) | 2017-02-16 |
US10148410B2 (en) | 2018-12-04 |
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