Intra-train communication network
First Claim
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1. A method of communicating between a master unit and one or more slave units in a network, the method comprising:
- transmitting, from the master unit to a slave unit, queries using a first network ID of a first group of network ID'"'"'s;
transmitting, from the slave unit to the master unit, a response using the first network ID if the slave unit is listening for the first network ID;
transmitting, from the master unit to an addressed slave unit, a query, which includes identification of the first network ID in a data portion of the query, using a second network ID of a second group of network ID'"'"'s if the master unit does not receive the response to the queries using the first network ID from the slave unit in a first time period; and
transmitting, from the addressed slave unit to the master unit, a response to the query which included the first network ID in the data portion of the query using the second network ID and then changing to listening for and transmitting using the first network ID.
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Abstract
An intra-train communication network comprising a plurality of transceiver units on individual vehicles of the train. A master unit initially transmits queries, including a first ID from a first group of ID'"'"'s, to the slave units using a second ID from a second group of ID'"'"'s, and subsequently transmits queries using the first ID from the first group. The slave units initially listens for queries using the second ID from the second group, responds using the second ID and subsequently listens for and responds using the first ID.
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Citations
33 Claims
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1. A method of communicating between a master unit and one or more slave units in a network, the method comprising:
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transmitting, from the master unit to a slave unit, queries using a first network ID of a first group of network ID'"'"'s;
transmitting, from the slave unit to the master unit, a response using the first network ID if the slave unit is listening for the first network ID;
transmitting, from the master unit to an addressed slave unit, a query, which includes identification of the first network ID in a data portion of the query, using a second network ID of a second group of network ID'"'"'s if the master unit does not receive the response to the queries using the first network ID from the slave unit in a first time period; and
transmitting, from the addressed slave unit to the master unit, a response to the query which included the first network ID in the data portion of the query using the second network ID and then changing to listening for and transmitting using the first network ID. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of initializing a communicating network including a plurality of units, the method comprising:
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setting each unit to listen for a network ID of a first group of network ID'"'"'s as a slave unit;
selecting one of the units as a master unit;
determining an available second network ID of a second group of network ID'"'"'s;
transmitting, from the master unit to all slave units using at least one network ID from the first group, a message including the second network ID in a data portion of the message; and
resetting each unit to listen for and communicate using the second network ID of the second group. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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23. An intra-train communication network comprising:
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a plurality of transceiver units on individual vehicles of the train;
one of the units being a master unit transmitting queries and the other units being slave units receiving the queries and transmitting responses;
the master unit initially transmitting a query, including a first network ID from a first group of network ID'"'"'s in a data portion of the query, to the slave units using a second network ID from a second group of network ID'"'"'s, and subsequently transmitting queries using the first network ID from the first group of network ID'"'"'s; and
the slave units initially listening for the query using the second network ID from the second group, responding using the second network ID, and subsequently listening for queries and responding using the first network ID. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A method of communicating between a master unit and one or more slave units in a network on a train, the method comprising:
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initially transmitting, from the master unit to the slave units, a query, which includes a first network ID from a first group of network ID'"'"'s in a data portion of the query, using a second network ID from a second group of network ID'"'"'s, and subsequently transmitting queries using the first network ID from the first group; and
the slave units initially listening for the query using the second network ID from the second group, responding using the second network ID and subsequently listening for queries and responding using the first network ID.
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Specification