Transosing a bi-directional s2m data stream for transmission via a low-voltage network

• US 20030149784A1
• Filed: 09/27/2002
• Published: 08/07/2003
• Est. Priority Date: 12/30/1999
• Status: Abandoned Application

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Neuhaus, Ralf, Stolle, Joerg, Ide, Hans-Dieter
• Application Number:
  US10/169,243
• Publication Number:
  US 20030149784A1
• Time in Patent Office: Days
• US Class Current: 709/231
• CPC Class Codes: H04B 2203/5408 using protocols
• CPC Class Codes: H04B 2203/5445 Local network
• CPC Class Codes: H04B 2203/545 Audio/video application, e.g. interphone
• CPC Class Codes: H04B 3/542 the information being in digital form
• CPC Class Codes: H04Q 11/0464 Primary rate access circuits
• CPC Class Codes: H04Q 2213/1308 Power supply
• CPC Class Codes: H04Q 2213/13202 Network termination [NT]
• CPC Class Codes: H04Q 2213/13209 ISDN
• CPC Class Codes: H04Q 2213/13292 Time division multiplexing, TDM

Abstract

The pseudo-ternary S_2m data stream consisting of a sequence of S_2m frames (S2mR) is transposed into a binary data stream consisting of a sequence of binary frames (BR). The useful information contained in a binary frame (BR) is then separated from the binary frame (BR) and subsequently compressed. In a following step, the compressed useful information is combined with the uncompressed information of the binary frame (BR) to form a compressed binary frame (KBR). Finally, the compressed binary frames (KBR) are inserted into a transmission packet provided for transmission via the low-voltage network (NSN) and are forwarded to a transmission unit (UEE) for transmission via the low-voltage network (NSN).

Claims

1. A method for conversion of an S_2m data stream for transmission via a low-voltage power network (NSN),

in which the pseudoternary S_2m data stream, which comprises a sequence of S_2m frames (S2mR) is converted to a binary data stream which comprises a sequence of binary frames (BR),

in which payload information which is contained in a binary frame (BR) is separated from the binary frame (BR) and is then compressed,

in which the compressed payload information is combined with the uncompressed information in the binary frame (BR) to form a compressed binary frame (KBR), and

in which the compressed binary frames (KBR) are inserted into transmission packets, which are intended for data transmission via the low-voltage power network (NSN), and are passed to a transmission unit (UEE) for transmission via the low-voltage power network (NSN).

2. The method as claimed in claim 1, characterized in that

a master-slave communication relationship is set up for data transmission via the low-voltage power network (NSN).

3. The method as claimed in claim 1 or 2, characterized in that

a time-division duplexing method (Time Division Duplex TDD) is used to subdivide the transmission packets into a first area (DS-B) for data transmission in a first transmission direction (DS), and into a second area (US-B) for data transmission in a second transmission direction (US), and

in that the compressed binary frames (KBR) are inserted into the first area or the second area (DS-B, US-B) of the transmission packet, depending on the direction.

4. The method as claimed in claim 3, characterized in that

compressed binary frames (KBR) are transmitted from a master device (M) to a slave device (S) in the first area (US-B), and compressed binary frames (KBR) are transmitted from the slave device (S) to the master device (M) in the second area (US-B).

5. The method as claimed in claim 3 or 4, characterized in that

the locations of the first area and of the second area (DS-B;

US-B) which do not contain any information after insertion of a compressed binary frame (KBR) into the respective area (DS-B, US-B) are filled with blank data (L).

6. The method as claimed in claim 1,

characterized in that first transmission packets, which are intended for data transmission in a first transmission direction (DS), are modulated by means of a frequency-division duplexing method (Frequency Division Duplex FDD) into a first frequency band (Δ

f-DS), and second transmission packets, which are intended for data transmission in a second transmission direction (US), are modulated into a second frequency band (Δ

f-US),

in that the compressed binary frames (KBR) are inserted into the first or second transmission packets depending on the direction,

and in that the first transmission packets are passed to a first transmission unit (UEE1), and the second transmission packets are passed to a second transmission unit (UEE2), for transmission via the low-voltage power network (NSN).

7. The method as claimed in claim 6, characterized in that compressed binary frames (KBR) are transmitted from a master device (M) to a slave device (S) in the first transmission packets, and compressed binary frames (KBR) are transmitted from the slave device (S) to the master device (M) in the second transmission packets.

8. The method as claimed in claim 6 or 7, characterized in that

those locations in the first and in the second transmission packets which do not contain any information after insertion of a compressed binary frame (KBR) into the respective transmission packet are filled with blank data (L).

9. The method as claimed in one of the preceding claims, characterized in that,

during the conversion of an S_2m frame (SR) to a binary frame (BR), information is inserted for recovery of the S_2m frame (SR).

10. The method as claimed in claim 8, characterized in that

an initial status bit (ANF), a synchronization bit (SYN), a V bit (V) and a B bit (B) are inserted into the binary frame (BR) as information.

11. The method as claimed in one of the preceding claims characterized in that

the payload information is compressed using the compression method G.729 standardized by the ITU-T.

12. The method as claimed in claim 11, characterized in that

the payload information which is associated with a respective payload data channel (B1, . . . , B30) is compressed separately in a respective channel-specific compression device (KE-B1, . . . , KE-B30).

13. The method as claimed in claim 11 or 12, characterized in that

the payload information, which is coded using a nonlinear A characteristic and has 8-bit resolution, is converted, before being compressed, to a linear signal which has 16-bit resolution.

14. An apparatus for conversion of an S_2m data stream for transmission via a low-voltage power network (NSN), having a conversion unit (UE) for conversion of the pseudoternary S_2m data stream, which comprises a sequence of S_2m frames (S2mR) to a binary data stream which comprises a sequence of binary frames (BR),

having a separation unit (ASE) for separation of payload information which is contained in a binary frame (BR), and having a compression unit (KE) for compression of the separated payload information,

having a frame formation unit for combination of the compressed payload information with the uncompressed information in the binary frame (BR) to form a compressed binary frame (KBR),

having a protocol unit (PE) for insertion of the compressed binary frames (KBR) into a transmission packet which is intended for data transmission via the low-voltage power network (NSN), and

having a transmission unit (UEE) for feeding the transmission packets into the low-voltage power network (NSN).

15. The apparatus as claimed in claim 14, characterized in that

the compression unit (KE) is designed on the basis of the compression method G.729 standardized by the ITU-T.

16. The apparatus as claimed in claim 14 or 15, characterized in that

the compression unit (KE) has thirty channel-specific compression units (KE-B1, . . . , KE-B30).

17. The apparatus as claimed in claim 16, characterized in that

the channel-specific compression units (KE-B1, . . . , KE-B30) are each preceded by a linearization unit (LE) for conversion of the payload information, which is coded using a nonlinear A characteristic and has 8-bit resolution, to a linear signal which has 16-bit resolution.

18. The apparatus as claimed in one of claims 14 to 17, characterized in that

the protocol unit (PE) is designed such that

a time-division duplexing method (Time Division Duplex TDD) is used to subdivide the transmission packets into a first area (DS-B) for data transmission in a first transmission direction (DS), and into a second area (US-B) for data transmission in a second transmission direction (US), and

the compressed binary frames (KBR) are inserted into the first area or the second area (DS-B, USB) of the transmission packet, depending on the direction.

19. The apparatus as claimed in one of claims 14 to 17, characterized in that

the protocol unit (PE) is designed such that

first transmission packets, which are intended for data transmission in a first transmission direction (DS), are modulated by means of a frequency-division duplexing method (Frequency Division Duplex FDD) into a first frequency band (Δ

f-DS), and second transmission packets, which are intended for data transmission in a second transmission direction (US), are modulated into a second frequency band (Δ

f-DS), and

the compressed binary frames (KBR) are inserted into the first or second transmission packets depending on the direction.

20. The apparatus as claimed in claim 19, characterized by

a first transmission unit (UEE1) for transmission of the first transmission packets, and a second transmission unit (UEE2) for transmission of the second transmission packets, via the low-voltage power network (NSN).

21. The apparatus as claimed in one of claims 14 to 20, characterized in that

a master-slave communication relationship is set up for data transmission via the low-voltage power network (NSN).

22. The apparatus as claimed in claim 21, characterized in that

a transformer station (MSN-NSN TS) which carries out the voltage conversion between a medium-voltage power network (MSN) and the low-voltage power network (NSN) is configured as the master device (M).

23. The apparatus as claimed in claim 21 or 22, characterized in that

a meter device (ZE), which is associated with a respective in-house area (IHB) of the low-voltage power network (NSN), is configured as the slave device (S).