Time management of information distributed on K-bytes in SDH frames
View Patent ↗A SONET/SDH frame providing for an optimized management of K1 and K2 bytes of protection protocol and providing for the management of a number of nodes higher than sixteen, which is the highest number which is provided for at the present time. In practice, the bits of a third byte (K0) of Multiplex Section OverHead are used in such a way that at least one of them represents a Source Node IDentification Extension bit, at least one of them represents a Destination Node IDentification Extension bit and at least one bit of those remaining indicates a change of the information in said first, second or third bytes (K1, K2, K0). In this way, the nodes which can be managed can be even 128 and the switching rate could be highly increased.
1. A computer is configured to produce a transmission frame, said computer comprising:
a processor, and a memory including software instruction is configured to enable the computer to perform the step of:
producing the transmission frame having a first, a second, and a third byte,
wherein the transmission frame comprises:
a section overhead with a Regeneration Section Overhead (RSOH) and a Multiplex Section Overhead (MSOH), in which said MSOH comprises the third byte comprising at least one Source Node IDentification Extension bit, at least one Destination Node IDentification Extension bit and at least one bit indicating a change of the information in at least one of the first, the second and third byte: and
said RSOH comprising the first and the second byte, said first byte comprising bits identifying the destination node and said second byte comprising bits identifying the source node, wherein said Source Node Identification Extension bits and said Destination Node Identification Extension bits, each comprise two bits and said at least one bit indicating a change of the information is four in number.
2. The computer according to claim 1 , wherein said Source Node IDentification Extension bits are fifth and sixth bits of the third byte, said Destination Node IDentification Extension bits are subsequent two bits and said bits indicating the information change are first four bits.
3. The computer according to claim 1 , wherein the third byte is located at 9 th row, 9 th column of first STM-1 of the transmission frame.
4. A computer is configured to produce a transmission frame, said computer comprising:
a processor, and a memory including software instruction is configured to enable the computer to perform the step of:
producing the transmission frame having a first, a second, and a third byte, wherein the transmission frame comprises:
a section overhead with a Regeneration Section OverHead (RSOH) and a Multiplex Section OverHead (MSOH), in which said MSOH comprises the third byte comprising at least one Source Node Identification Extension bit, at least one Destination Node IDentification Extension bit and at least one bit indicating a change of the information in at least one of the first, the second and the third byte; and
said RSOH comprising the first byte and the second byte, said first byte comprising bits identifying the destination node and said second byte comprising bits identifying the source node,
wherein both said Source Node IDentification Extension bits and said Destination Node IDentification Extension bits are three bits and said bits indicating the information change are two in number.
5. The computer according to claim 4 , wherein said Source Node IDentification Extension bits are third, fourth and fifth bits of the third byte, said Destination Node IDentification Extension bits are subsequent three bits and said bits indicating the information change are first two bits.
6. A transmitter is configured to transmit information carried by a transmission frame, comprising:
a processor, and
a memory including software instruction is configured to enable the transmitter to perform the steps of:
producing the transmission frame having a first byte, a second byte, and a third byte, in which bits of the third byte of the MSOH are arranged in a way that at least one of said bits represents an Extension of Source Node IDentification and at least one of said bits represents an Extension of Destination node IDentification and at least one of the remaining bits indicates an information change in said at least one of said first, said second and said third byte; and transmitting the produced transmission frame,
wherein both said Source Node IDentification Extension bits and said Destination Node IDentification Extension bits are two in number and said bits indicating the information change are four in number.
7. The transmitter according to claim 6 , wherein in transmitting the transmission frame, the first and the second bytes are sent first and finally the third byte is sent.
8. The transmitter according to claim 6 , wherein in receiving the transmission frame, the first and second bytes are read if at least one but preferably all bits indicating the information change of the third byte are changed and as a result an interrupt is generated.
9. The transmitter according to claim 8 , wherein the Destination Node IDentification Extension is calculated with the following algorithm:
IDDN K1+K0 =IDDN K1 +16 IDDNE K0
where: IDDN K1+K0 =binary number “extended” IDentification of the Destination Node (calculated by using the bits of the first and third byte); IDDN K1 =binary number IDentification of the Destination Node; IDDNE K0 =binary number Extension of the Destination Node IDentification.
10. A computer program running on the transmitter comprising means for implementing the algorithm set forth in claim 9 or 12 .
11. A computer readable medium having a computer program recorded thereon, said computer readable medium comprising means for implementing the algorithm indicated in claim 9 .
12. The transmitter according to claim 8 , wherein the Extension of Source Node IDentification is calculated with the following algorithm:
IDSN K2+K0 =IDSN K2 +16 IDSNE K0
Where: IDSN K2+K0 =binary number Extended IDentification of the Source Node (calculated by using the bits of the second byte and the third byte); IDSN K2 =binary number IDentification of the Source Node; IDSNE K0 =binary number Extension of the Source Node IDentification.
13. A transmitter is configured to transmit information carried by a transmission frame, comprising:
a processor, and
a memory including software instruction is configured to enable the transmitter to perform the step of:
producing the transmission frame having a first byte, a second byte, and a third byte, in which bits of the third byte of the MSOH are arranged in a way that at least one of said bits represents an Extension of Source Node IDentification and at least one of said bits represents an Extension of Destination Node IDentification and at least one of the remaining bits indicates an information change in said at least one of said first, said second and said third byte; and
transmitting the produced transmission frame,
wherein both said Source Node IDentification Extension bits and said Destination Node IDentification Extension bits are three in number and said bits indicating the information change are two in number.
14. A data transmission apparatus is configured to produce a transmission frame, said data transmission apparatus comprising:
a processor, and a memory including software instruction is configured to enable the data transmission apparatus to perform the step of:
producing the transmission with a first, a second and a third byte,
wherein the third byte is used by the processor to manage in an optimized manner, information contained in the first and the second byte of the transmission frame, and
wherein said third byte comprises at least one Source Node IDentification Extension bit, at least one Destination Node IDentification Extension bit and at least one bit indicating a change of information in said at least one of said first, said second and said third byte,
wherein said Source Node IDentification Extension bits and said Destination Node IDentification Extension bits, each comprise two bits and said at least one bit indicating a change of information are four in number.
15. A method of communicating between stations, comprising
creating a transmission frame having a section overhead with a Regeneration Section OverHead (RSOH) and a Multiplex Section OverHead (MSOH); and
transmitting said created transmission frame from a first station to a second station,
wherein said RSOH comprising a first byte and a second byte, said first byte comprises bits identifying the destination node and said second byte comprising bits identifying the source node, and wherein said MSOH comprises a third byte comprising at least one Source Node IDentification Extension bit, at least one Destination Node IDentification Extension bit and at least one bit indicating a change of the information in said at least one of said first, said second and said third byte,
wherein said Source Node IDentification Extension bits and said Destination Node IDentification Extension bits, each comprise two bits and said at least one bit indicating change of information are four in number.
16. The method of communicating between stations according to claim 15 , wherein said Source Node IDentification Extension bits has fifth and sixth bits of the third byte, said Destination Node IDentification Extension bits has subsequent two bits and said information change has first four bits.
17. The method of communicating between stations according to claim 15 , wherein the third byte is located at 9 th row, 9 th column of first STM-1 of the transmission frame.
18. A method of communicating between stations, comprising:
creating a transmission frame having a section overhead with a Regeneration Section OverHead (RSOH) and a Multiplex Section OverHead (MSOH); and
transmitting said created transmission frame from a first station to a second station,
wherein said RSOH comprising a first byte and a second byte, said first byte comprises bits identifying the destination node and said second byte comprising bits identifying the source node, and wherein said MSOH comprises a third byte comprising at least one Source Node IDentification Extension bit, at least one Destination Node IDentification Extension bit and at least one bit indicating a change of the information in said at least one of said first, said second and said third byte,
wherein both said Source Node IDentification Extension bits and said Destination Node IDentification Extension bits have three bits and said at least one bit indicating a change of information are two in number.
19. The method of communicating between stations according to claim 18 , wherein said Source Node IDentification Extension bits has third, fourth and fifth bits of the third byte, said Destination Node IDentification Extension bits has subsequent three bits and said information change has first two bits.
20. A method of communicating in a network comprising:
producing a transmission frame; and
transmitting said produced transmission frame with a transmitter,
wherein use of a third byte of the transmission frame to manage in an optimized manner information contained in a first and a second byte of the transmission frame, and wherein said third byte comprises at least one Source Node IDentification Extension bit, at least one Destination Node IDentification one of the first, the second and the third byte,
wherein said Source Node IDentification Extension bits and said Destination Node IDentification Extension bits, each comprise two bits and said at least one bit indicating a change of information are four in number.