IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
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| 국제특허분류(IPC7판) |
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| 출원번호 |
US-0261364
(2002-09-30)
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| 등록번호 |
US-7307357
(2007-12-11)
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|
발명자
/ 주소 |
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| 출원인 / 주소 |
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| 대리인 / 주소 |
Ware, Fressola, Van Der Sluys & Adolphson LLP
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| 인용정보 |
피인용 횟수 :
133 인용 특허 :
0 |
초록
▼
A method and system to increase the throughput of a communications system that uses an electrical power distribution system as a communications pathway, determines the phase of the power distribution power cycle and compares this determined phase to predetermined regions of the power cycle. If the p
A method and system to increase the throughput of a communications system that uses an electrical power distribution system as a communications pathway, determines the phase of the power distribution power cycle and compares this determined phase to predetermined regions of the power cycle. If the power cycle is within a predetermined region, a particular communication scheme is used for transmitting and receiving information. The power cycle can have two or more predetermined regions. Optionally, the throughput for any or all regions can be determined so as to provide for modification of the associated communication scheme if the throughput is determined to be outside some predetermined range.
대표청구항
▼
Having described the invention, what is claimed is: 1. A method of adjusting the throughput of a communications system that uses a cable of an electrical power distribution system as a communication pathway, wherein the power distribution has a repetitive power cycle period, comprising the steps of
Having described the invention, what is claimed is: 1. A method of adjusting the throughput of a communications system that uses a cable of an electrical power distribution system as a communication pathway, wherein the power distribution has a repetitive power cycle period, comprising the steps of: a) determining the phase of the power distribution power cycle; and b) determining if the phase of the power distribution power cycle is within a predetermined region Ri, for i=1, . . . , N, were N is an integer≧2, where each region R1 extends over a portion of the power distribution power cycle, and if so, using a predetermined communication scheme during said region R1 for transmitting and receiving information that is communicated over the electrical power distribution system cable. 2. A method as defined in claim 1, wherein the step of determining the phase of the power distribution power cycle is performed by determining when there is a zero crossing of the power cycle. 3. A method as defined in claim 2, wherein N=2 and wherein Region1 is centered on the zero crossing of the power cycle and extends a predetermined number of degrees on each side of the zero crossing, and where Region2 is the remainder of the power cycle. 4. A method as defined in claim 3, wherein the voltage of the power distribution power cycle is used for determining the phase of the power distribution power cycle. 5. A method as defined in claim 3, wherein the current of the power distribution power cycle is used for determining the phase of the power distribution power cycle. 6. A method as defined in claim 3, wherein Region2 is related to high frequency noise and wherein the predetermined communication scheme for said region has increased reliability of communicating information than the predetermined communication scheme for Region1. 7. A method as defined in claim 1, wherein a predetermined communication scheme associated with a particular Regionj, where j is a single integer, is a null communication scheme for said region. 8. A method as defined in claim 1, wherein the predetermined communication scheme used for any Regionj having a higher noise content than another Regionk, is to use a predetermined communication scheme for Regionj that uses a modulation scheme of lesser symbol efficiency than that used for Regionk; where j and k are integers. 9. A method as defined in claim 1, wherein the predetermined communication scheme used for any Regionj having a higher noise content than another Regionk, is to use a predetermined communication scheme for Regionj that uses an error correction scheme that has greater error correcting capability than that used for Regionk; where j and k are integers. 10. A method as defined in claim 1, further comprising the steps of: determining the throughput for communications in at least one Regionj, and if the throughput for Regionj is outside a predetermined range of throughput values for said region, then modifying the predetermined communication scheme for use in Regionj, where j is an integer. 11. A method as defined in claim 10, wherein the step of determining the phase of the power distribution power cycle is performed by determining when there is a zero crossing of the power cycle. 12. A method as defined in claim 11, wherein N=2 and wherein Region1 is centered on the zero crossing of the power cycle and extends a predetermined number of degrees on each side of the zero crossing, and where Region2 is the remainder of the power cycle. 13. A method as defined in claim 12, wherein the voltage of the power distribution power cycle is used for determining the phase of the power distribution power cycle. 14. A method as defined in claim 12, wherein the current of the power distribution power cycle is used for determining the phase of the power distribution power cycle. 15. A method as defined in claim 10, wherein the predetermined communication scheme used for any Regionj having a higher noise content than another Regionk, is to use a predetermined communication scheme for Regionj that uses a modulation scheme of lesser symbol efficiency than that used for Regionk; where j and k are integers. 16. A method as defined in claim 10, wherein the predetermined communication scheme used for any Regionj having a higher noise content than another Regionk, is to use a predetermined communication scheme for that uses an error correction scheme for Regionj that has greater error correcting capability than that used for Regionk; where j and k are integers. 17. A system for adjusting the throughput of a communications system that uses a cable of an electrical power distribution system as a communication pathway, wherein the power distribution has a repetitive power cycle period, comprising: a) means for determining the phase of the power distribution power cycle; and b) means for determining if the phase of the power distribution power cycle is within a predetermined region Ri, for i=1, . . . , N, were N is an integer≧2, where each region R1 extends over a portion of the power distribution power cycle; and c) means for using a predetermined communication scheme during said region R1 for transmitting and receiving information that is communicated over the electrical power distribution system cable if the determined phase of the power distribution power cycle is within region Ri. 18. A system as defined in claim 17, wherein the means for determining the phase of the power distribution power cycle determines when there is a zero crossing of the power cycle for purposes of determining the phase of the power distribution power cycle. 19. A system as defined in claim 18, wherein N=2 and wherein Region1 is centered on the zero crossing of the power cycle and extends a predetermined number of degrees on each side of the zero crossing, and where Region2 is the remainder of the power cycle. 20. A system as defined in claim 18, wherein the voltage of the power distribution power cycle is used by the means for determining the phase of the power distribution power cycle as the parameter that is measured for determining the phase of the power distribution power cycle. 21. A system as defined in claim 18, wherein the current of the power distribution power cycle is used by the means for determining the phase of the power distribution power cycle as the parameter that is measured for determining the phase of the power distribution power cycle. 22. A system as defined in claim 18, wherein Region2 is related to high frequency noise and wherein the predetermined communication scheme for said region has increased reliability of communicating information than the predetermined communication scheme for Region1. 23. A system as defined in claim 17, wherein a predetermined communication scheme associated with a particular Regionj, where j is a single integer, is a null communication scheme for said region. 24. A system as defined in claim 17, wherein the predetermined communication scheme used for any Regionj having a higher noise content than another Regionk, is to use a predetermined communication scheme for Regionj that uses a modulation scheme of lesser symbol efficiency than that used for Regionk; where j and k are integers. 25. A system as defined in claim 17, wherein the predetermined communication scheme used for any Regionj having a higher noise content than another Regionk, is to use a predetermined communication scheme for Regionj that uses an error correction scheme that has greater error correcting capability than that used for Regionk; where j and k are integers. 26. A system as defined in claim 17, further comprising: means for determining the throughput for communications in at least one Regionj; and means for modifying the predetermined communication scheme for use in Regionj, if the determined throughput for Regionj is outside a predetermined range of throughput values for said region, where j is an integer. 27. A system as defined in claim 26, wherein the means for determining the phase of the power distribution power cycle determines when there is a zero crossing of the power cycle for purposes of determining the phase of the power distribution power cycle. 28. A system as defined in claim 27, wherein N=2 and wherein Regionj is centered on the zero crossing of the power cycle and extends a predetermined number of degrees on each side of the zero crossing, and where Region2 is the remainder of the power cycle. 29. A system as defined in claim 28, wherein the voltage of the power distribution power cycle is used by the means for determining the phase of the power distribution power cycle as the parameter that is measured for determining the phase of the power distribution power cycle. 30. A system as defined in claim 28, wherein the current of the power distribution power cycle is used by the means for determining the phase of the power distribution power cycle as the parameter that is measured for determining the phase of the power distribution power cycle. 31. A system as defined in claim 26, wherein the predetermined communication scheme used for any Regionj having a higher noise content than another Regionk, is to use a predetermined communication scheme for Regionj that uses a modulation scheme of lesser symbol efficiency than that used for Regionk; where j and k are integers.
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