On-vehicle communication system, optical communication harness and optical distribution apparatus
First Claim
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1. A communication system, comprising:
- an optical distribution device that outputs an input optical signal; and
plural optical communication apparatuses, each of which is connected to the optical distribution device, whereinthe optical distribution device comprises;
plural optically inputting units, into each of which an optical signal is inputted, and each of the plural optically inputting units is connected to each of the plural optical communication apparatuses; and
plural optically outputting units, each of which outputs an optical signal and is connected to each of the plural optical communication apparatuses,an optical signal input into an optically inputting unit among the plural inputting units is output from all of the plural outputting units, andeach optical communication apparatus comprises;
an optically transmitting unit that transmits an optical signal to an optically inputting unit among the plural optically inputting units;
an optically receiving unit that receives an optical signal output from an optically outputting unit among the plural optically outputting units; and
a collision detecting unit that detects whether a transmission of an optical signal performed by the optically transmitting unit of said each optical communication apparatus collides with a transmission of an optical signal performed by another optically transmitting unit comprised by another optical communication apparatus;
whereinthe communication system further comprises;
another optical distribution device that is configured similarly to the optical distribution device; and
another plural optical communication apparatuses that are connected to said another optical distribution device and are configured similarly to the plural optical communication apparatuses;
whereina predetermined optically outputting unit in the optical distribution device is connected through a first filter to said another optical distribution device,a predetermined optically outputting unit in said another optical distribution device is connected through a second filter to the optical distribution device,the first filter attenuates an optical signal whose wavelength is different from a wavelength of an optical signal to be transmitted from the plural optical communication apparatuses, but not an optical signal whose wavelength is not different from the wavelength of the optical signal to be transmitted from the plural optical communication apparatuses,the second filter attenuates an optical signal whose wavelength is different from a wavelength of an optical signal to be transmitted from said another plural optical communication apparatuses, but not an optical signal whose wavelength is not different from the wavelength of the optical signal to be transmitted from said another plural optical communication apparatuses; and
the wavelength of the optical signal to be transmitted from the plural optical communication apparatuses is different from the wavelength of the optical signal to be transmitted from said another plural optical communication apparatuses.
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Abstract
Plural optical communication apparatuses are connected through communication lines with a star topology to an optical coupler that is arranged at the center of star topology and can distribute input light. Each optical communication apparatus makes an optically transmitting unit input an optical signal into an optically inputting unit of the optical coupler, and makes an optically receiving unit receive an optical signal output from an optically outputting unit of the optical coupler, for detecting a collision based on the reception signal. After transmitting an optical signal from the optically transmitting unit, each of optical communication apparatuses makes the optically receiving unit receive the optical signal, performs the collision detection based on the comparison between the transmission signal and the reception signal. When having detected the collision, each of optical communication apparatuses stops own processing for transmitting the optical signal and performs processing for receiving optical signals.
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Citations
17 Claims
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1. A communication system, comprising:
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an optical distribution device that outputs an input optical signal; and plural optical communication apparatuses, each of which is connected to the optical distribution device, wherein the optical distribution device comprises; plural optically inputting units, into each of which an optical signal is inputted, and each of the plural optically inputting units is connected to each of the plural optical communication apparatuses; and plural optically outputting units, each of which outputs an optical signal and is connected to each of the plural optical communication apparatuses, an optical signal input into an optically inputting unit among the plural inputting units is output from all of the plural outputting units, and each optical communication apparatus comprises; an optically transmitting unit that transmits an optical signal to an optically inputting unit among the plural optically inputting units; an optically receiving unit that receives an optical signal output from an optically outputting unit among the plural optically outputting units; and a collision detecting unit that detects whether a transmission of an optical signal performed by the optically transmitting unit of said each optical communication apparatus collides with a transmission of an optical signal performed by another optically transmitting unit comprised by another optical communication apparatus;
whereinthe communication system further comprises; another optical distribution device that is configured similarly to the optical distribution device; and another plural optical communication apparatuses that are connected to said another optical distribution device and are configured similarly to the plural optical communication apparatuses;
whereina predetermined optically outputting unit in the optical distribution device is connected through a first filter to said another optical distribution device, a predetermined optically outputting unit in said another optical distribution device is connected through a second filter to the optical distribution device, the first filter attenuates an optical signal whose wavelength is different from a wavelength of an optical signal to be transmitted from the plural optical communication apparatuses, but not an optical signal whose wavelength is not different from the wavelength of the optical signal to be transmitted from the plural optical communication apparatuses, the second filter attenuates an optical signal whose wavelength is different from a wavelength of an optical signal to be transmitted from said another plural optical communication apparatuses, but not an optical signal whose wavelength is not different from the wavelength of the optical signal to be transmitted from said another plural optical communication apparatuses; and the wavelength of the optical signal to be transmitted from the plural optical communication apparatuses is different from the wavelength of the optical signal to be transmitted from said another plural optical communication apparatuses. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A communication harness, comprising:
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an optical distribution device that outputs an input optical signal; plural optical communication apparatuses; plural optical communication lines that are connected to the optical distribution device; and a filter that attenuates an optical signal having a predetermined wavelength, wherein the optical distribution device comprises plural optically inputting units and plural optically outputting units, each of the plural optically inputting units is connected to each of the plural optical communication apparatuses, and each of the plural optically outputting units is connected to each of the plural optical communication apparatuses, an optical signal input into an optically inputting unit among the plural optically inputting units is output from all of the plural optically outputting units, and each optical communication line is connected to one of the plural optically inputting units or one of the optically outputting units;
whereinthe communication harness further comprises; another optical distribution device that is configured similarly to the optical distribution device; and another plural optical communication apparatuses that are connected to said another optical distribution device and are configured similarly to the plural optical communication apparatuses;
whereina predetermined optically outputting unit in the optical distribution device is connected through a first filter to said another optical distribution device, a predetermined optically outputting unit in said another optical distribution device is connected through a second filter to the optical distribution device, the first filter attenuates an optical signal whose wavelength is different from a wavelength of an optical signal to be transmitted from the plural optical communication apparatuses, but not an optical signal whose wavelength is not different from the wavelength of the optical signal to be transmitted from the plural optical communication apparatuses, the second filter attenuates an optical signal whose wavelength is different from a wavelength of an optical signal to be transmitted from said another plural optical communication apparatuses, but not an optical signal whose wavelength is not different from the wavelength of the optical signal to be transmitted from said another plural optical communication apparatuses; and the wavelength of the optical signal to be transmitted from the plural optical communication apparatuses is different from the wavelength of the optical signal to be transmitted from said another plural optical communication apparatuses. - View Dependent Claims (13, 14, 15)
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16. An optical distribution apparatus, comprising:
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an optical distribution device that outputs an input optical signal; plural optical communication apparatuses; and a filter that attenuates an optical signal having a predetermined wavelength, wherein the optical distribution device comprises plural optically inputting units and plural optically outputting units, each of the plural optically inputting units is connected to each of the plural optical communication apparatuses, and each of the plural optically outputting units is connected to each of the plural optical communication apparatuses, an optical signal input into an optically inputting unit among the plural optically inputting units is output from all of the plural optically outputting units, and the filter is connected to a predetermined optically outputting unit among the plural optically outputting units;
whereinthe optical distribution apparatus further comprises; another optical distribution device that is configured similarly to the optical distribution device; and another plural optical communication apparatuses that are connected to said another optical distribution device and are configured similarly to the plural optical communication apparatuses;
whereina predetermined optically outputting unit in the optical distribution device is connected through a first filter to said another optical distribution device, a predetermined optically outputting unit in said another optical distribution device is connected through a second filter to the optical distribution device, the first filter attenuates an optical signal whose wavelength is different from a wavelength of an optical signal to be transmitted from the plural optical communication apparatuses, but not an optical signal whose wavelength is not different from the wavelength of the optical signal to be transmitted from the plural optical communication apparatuses, the second filter attenuates an optical signal whose wavelength is different from a wavelength of an optical signal to be transmitted from said another plural optical communication apparatuses, but not an optical signal whose wavelength is not different from the wavelength of the optical signal to be transmitted from said another plural optical communication apparatuses; and the wavelength of the optical signal to be transmitted from the plural optical communication apparatuses is different from the wavelength of the optical signal to be transmitted from said another plural optical communication apparatuses. - View Dependent Claims (17)
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Specification
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Current AssigneeAutonetworks Technologies, Ltd. (Sumitomo Corporation), Sumitomo Electric Industries Limited (Sumitomo Corporation), Sumitomo Wiring Systems Limited (Sumitomo Corporation)
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Original AssigneeAutonetworks Technologies, Ltd. (Sumitomo Corporation), Sumitomo Electric Industries Limited (Sumitomo Corporation), Sumitomo Wiring Systems Limited (Sumitomo Corporation)
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InventorsYuki, Hayato, Uchino, Takeo
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Primary Examiner(s)Vanderpuye, Ken
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Assistant Examiner(s)SANCHEZ, DIBSON J
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Application NumberUS13/384,737Publication NumberTime in Patent Office1,565 DaysField of Search398/36, 398/140, 398 58- 64, 398/99, 385/15, 385/24US Class Current398/36CPC Class CodesH04B 10/272 Star-type networks or tree-...H04L 12/413 with random access, e.g. ca...H04L 12/417 with deterministic access, ...H04L 12/44 Star or tree networksH04L 2012/40215 Controller Area Network CANH04L 2012/40273 the transportation system b...
