Method enabling multiple communication nodes to access a transmission means on an electrical grid
First Claim
1. Method enabling multiple communication nodes to access a transmission means on an electrical grid, comprising communication among different systems using the electrical network as communications channel, an access protocol to the medium and some signals for carrying out that protocol, wherein two different signals are used;
- one a start of transmission (SOT) (5), and other an end of transmission (EOT) (10), in order to reserve and release a channel respectively, and which all the systems present in the network are capable of detecting;
when a node wishes to access the channel it waits for the release of the channel (3) and then establishes a contention period (4) in which the node carries out an action selectively between waiting a random length of time before sending a start of transmission (SOT) signal (5) in order to reserve the channel, and desisting from making a reservation if it detects a start of transmission (SOT) signal (5) before its waiting time (4) has expired; and
once a node has reserved the channel with a start of transmission (SOT) signal (5) a maximum amount of time is established for transmitting information, after which an end of transmission (EOT) signal (10) is transmitted.
1 Assignment
0 Petitions
Accused Products
Abstract
Method enabling multiple communication nodes to access a transmission means on an electrical grid, which permits access in a fair manner by nodes on a shared medium such as the electrical network, achieving the maximum access speed when there are no collisions between reservation requests and the detection of coexistence signals in a robust way in noisy environments. It is characterized by the use of signals for reservation (5) and release (10) of the communication and by the random waiting prior to a reservation of the electrical network with minimum and maximum values fixed in advance.
268 Citations
33 Claims
-
1. Method enabling multiple communication nodes to access a transmission means on an electrical grid, comprising communication among different systems using the electrical network as communications channel, an access protocol to the medium and some signals for carrying out that protocol, wherein
two different signals are used; - one a start of transmission (SOT) (5), and other an end of transmission (EOT) (10), in order to reserve and release a channel respectively, and which all the systems present in the network are capable of detecting;
when a node wishes to access the channel it waits for the release of the channel (3) and then establishes a contention period (4) in which the node carries out an action selectively between waiting a random length of time before sending a start of transmission (SOT) signal (5) in order to reserve the channel, and desisting from making a reservation if it detects a start of transmission (SOT) signal (5) before its waiting time (4) has expired; and
once a node has reserved the channel with a start of transmission (SOT) signal (5) a maximum amount of time is established for transmitting information, after which an end of transmission (EOT) signal (10) is transmitted. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
- one a start of transmission (SOT) (5), and other an end of transmission (EOT) (10), in order to reserve and release a channel respectively, and which all the systems present in the network are capable of detecting;
Specification