Cell isolation through quasi-orthogonal sequences in a frequency hopping network
First Claim
1. Methodology for generating a pseudo-random sequence for use in an advanced metering system frequency hopping network, comprising:
- establishing a network including a central facility and a plurality of end devices, at least some of which end devices comprise metrology devices, and wherein each end device is associated with one of a plurality of cells, each cell being assigned a unique cell identifier;
constructing an outer hopping sequence for a given cell using the given cell'"'"'s unique cell identifier as a seed;
using the elements of the outer hopping sequence to select a specific N-hop inner hopping sequence, where integer N is the number of channels used by the advanced metering system frequency hopping network; and
applying the selected sequence as a transceiver hopping pattern for a selected end device within the given cell.
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Abstract
The present technology relates to protocols relative to utility meters associated with an open operational framework. More particularly, the present subject matter relates to protocol subject matter for advanced metering infrastructure, adaptable to various international standards, while economically supporting a 2-way mesh network solution in a wireless environment, such as for operating in a residential electricity meter field. The present subject matter supports meters within an ANSI standard C12.22/C12.19 system while economically supporting a 2-way mesh network solution in a wireless environment, such as for operating in a residential electricity meter field, all to permit cell-based adaptive insertion of C12.22 meters within an open framework. Cell isolation is provided through methodology and apparatus subject matter relating to quasi-orthogonal sequences in a frequency hopping network.
47 Citations
25 Claims
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1. Methodology for generating a pseudo-random sequence for use in an advanced metering system frequency hopping network, comprising:
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establishing a network including a central facility and a plurality of end devices, at least some of which end devices comprise metrology devices, and wherein each end device is associated with one of a plurality of cells, each cell being assigned a unique cell identifier;
constructing an outer hopping sequence for a given cell using the given cell'"'"'s unique cell identifier as a seed;
using the elements of the outer hopping sequence to select a specific N-hop inner hopping sequence, where integer N is the number of channels used by the advanced metering system frequency hopping network; and
applying the selected sequence as a transceiver hopping pattern for a selected end device within the given cell. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An advanced metering system frequency hopping network, comprising:
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a central facility; and
a plurality of end devices, at least some of which end devices comprise metrology devices, with said central facility and said plurality of end devices being configured for bi-directional communications therebetween, and with each end device being associated with one of a plurality of cells each having a unique cell identifier;
wherein each end device within a given cell is configured for synchronized communications with each other end device in the given cell;
wherein communications among adjacent cells is substantially isolated; and
wherein communications effected by one or more end devices within a given cell are effected using a hopping pattern formed from a nested combination of two sequences, including an inner sequence generated with Galois field arithmetic and an outer sequence generated using the unique cell identifier for the given cell as a seed. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A metrology device for use with an advanced metering system frequency hopping network, said metrology device characterized by a unique identifier, said metrology device comprising:
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a metrology portion configured to measure consumption of a utility commodity;
a transmitter portion configured to transmit consumption information;
a receiver portion configured to receive information from other network devices; and
wherein said transmitter portion and said receiver portion are configured to communicate using a frequency hopping pattern formed from a nested combination of two sequences, including an inner hopping sequence generated with Galois field arithmetic and an outer hopping sequence generated using the unique identifier for the metrology device as a seed. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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Specification