Method for transferring information and associated network transition units

• US 20050041633A1
• Filed: 04/04/2002
• Published: 02/24/2005
• Est. Priority Date: 04/04/2001
• Status: Abandoned Application

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Wunderlich, Frederick, Roeser, Wieland
• Application Number:
  US10/473,969
• Publication Number:
  US 20050041633A1
• Time in Patent Office: Days
• US Class Current: 370/351
• CPC Class Codes: H04L 2012/5625 Operations, administration and maintenance [OAM]
• CPC Class Codes: H04L 2012/5663 Support of N-ISDN
• CPC Class Codes: H04Q 11/045 Selection or connection testing arrangements
• CPC Class Codes: H04Q 11/0464 Primary rate access circuits
• CPC Class Codes: H04Q 11/0478 Provisions for broadband connections
• CPC Class Codes: H04Q 2213/13039 Asymmetrical two-way transmission, e.g. ADSL, HDSL
• CPC Class Codes: H04Q 2213/1316 Service observation, testing
• CPC Class Codes: H04Q 2213/13174 Data transmission, file transfer
• CPC Class Codes: H04Q 2213/13196 Connection circuit/link/trunk/junction, bridge, router, gateway
• CPC Class Codes: H04Q 2213/13202 Network termination [NT]
• CPC Class Codes: H04Q 2213/13203 Exchange termination [ET]
• CPC Class Codes: H04Q 2213/13205 Primary rate access, PRI
• CPC Class Codes: H04Q 2213/13209 ISDN
• CPC Class Codes: H04Q 2213/13215 Code checking, CRC
• CPC Class Codes: H04Q 2213/13216 Code signals, frame structure
• CPC Class Codes: H04Q 2213/1329 Asynchronous transfer mode, ATM
• CPC Class Codes: H04Q 2213/13335 Simulation, emulation
• CPC Class Codes: H04Q 2213/13349 Network management
• CPC Class Codes: H04Q 2213/13389 LAN, internet

Abstract

Disclosed is a method wherein operative, administrative and maintenance functions are defined initially for a time-division multiplex oriented communication network (12). In order to utilize said functions in a packet-oriented communication network (10), they are emulated by said network (10).

Claims

1. A method for transferring information within at least one time-division multiplex oriented communication network via at least one packet-oriented communication network, comprising:

implementing functions for operation and/or administration and/or maintenance in the time-division multiplex oriented communication network for transfer of the information within the time-division multiplex oriented communication network;

transferring at least a part of the information via the packet-oriented communication network; and

emulating at least some of the functions for operation, administration and maintenance of the time-division multiplex oriented communication network by the packet-oriented communication network.

2. The method according to claim 1, wherein a customer-side network transition unit is disposed between a customer area and the packet-oriented communication network,

and an exchange-side network transition unit is disposed between the packet-oriented communication network and an exchange of the time-division multiplex oriented communication network.

3. The method according to claim 2, wherein a function relates to the activation of a loopback from the exchange via the exchange-side network transition unit back to the exchange,

the exchange sets at least one Sa5 bit to the value zero and using successive Sa6 bits transmits an Sa6 bit sequence with the value “

1111”

at least eight times,

the values of the Sa5 bits and the Sa6 bit sequence are detected in the exchange-side network transition unit,

when the value zero is detected for the Sa5 bit when the value “

1111”

is detected eight times in succession for the Sa6 bit sequence by the exchange-side network transition unit, the data arriving from the exchange is transmitted back essentially unchanged to the exchange, whereby at least one A bit with the value one and at least one Sa5 bit with the value zero are transmitted from the exchange-side network transition unit to the exchange,

and at least one A bit with the value one is transferred by the exchange-side network transition unit via the packet-oriented communication network.

4. The method according to claim 2, wherein one of the functions relates to activation of a loopback from the exchange, via the exchange-side network transition unit, via the customer-side network transition unit, back to the exchange-side network transition unit and then back to the exchange,

the exchange transmits at least one Sa5 bit with a value zero and an Sa6 bit sequence with a value “

1010”

at least eight times,

the value of the Sa5 bit and the value of the Sa6 bit sequence are detected in the exchange-side network transition unit,

when the value zero is detected for the Sa5 bit and when the value “

1010”

is detected eight times in succession for the Sa6 bit sequence by the exchange-side network transition unit, the data arriving from the exchange is transmitted back essentially unchanged to the exchange, whereby at least one A bit with a value one and at least one Sa5 bit with a value zero are transmitted by the exchange-side network transition unit to the exchange, and

whereby the incoming data is manipulated depending on transmission errors in a part of the loopback located in the packet-oriented communication network,

the transmission of loopback data packets is initiated by the exchange-side network transition unit,

the loopback data packets are detected in the customer-side network transition unit and transmitted back to the exchange-side network transition unit,

the exchange-side network transition unit checks the received loopback data packets and depending on the result of the check manipulates the data to be transmitted to the exchange, and upon detection of a loopback data packet at least one A bit with the value one is transmitted to a customer telephony equipment by the customer-side network transition unit.

5. The method according to claim 2, wherein one of the functions relates to the monitoring of the performance and continuity of the transmission from the exchange-side network transition unit to the customer-side network transition unit,

performance data packets and continuity data packets are generated in the exchange-side network transition unit and transmitted to the customer-side network transition unit,

the performance data packets and continuity data packets are monitored in the customer-side network transition unit,

when an error is detected by the customer-side network transition unit at least one E bit with a value zero is transmitted via the packet-oriented communication network to the exchange-side network transition unit and is forwarded to the exchange,

and in the exchange-side network transition unit a new checksum is computed for the data to be transmitted to the exchange.

6. The method according to claim 2, wherein on of the function relates to the monitoring of the performance and continuity of the transmission from the customer-side network transition unit to the exchange-side network transition unit,

performance data packets and continuity data packets are generated in the customer-side network transition unit and transmitted to the exchange-side network transition unit,

the performance data packets and continuity data packets are monitored in the exchange-side network transition unit,

upon an error the computation of a checksum for the data to be transmitted to the exchange is manipulated,

and in the error-free case a checksum for the data to be transmitted to the exchange is computed without manipulation.

7. The method according to claim 2, wherein one of the function relates to an error which is reported by a customer telephony equipment,

that the error monitoring method is performed in the customer telephony equipment,

when an error is detected by the customer telephony equipment least one E bit with a value zero is transmitted to the customer-side network transition unit,

the value of the E bit is monitored in the customer-side network transition unit,

when the value zero is detected for the E bit by the customer-side network transition unit at least one Sa5 bit with the value one and at least one Sa6 bit sequence with the value “

0001”

are transmitted via the packet-oriented communication network to the exchange-side network transition unit and are forwarded to the exchange.

8. The method according to claim 2, wherein one of the function relates to an error which is detected by the customer-side network transition unit,

the error monitoring method is performed in the customer-side network transition unit,

when an error is detected by the customer-side network transition unit at least one Sa5 bit with a value one and at least one Sa6 bit sequence with a value “

0010”

are transmitted via the packet-oriented communication network to the exchange-side network transition unit and are forwarded to the exchange,

and upon an error being detected by the customer-side network transition unit at least one E bit with the value zero is transmitted to the customer telephony equipment.

9. The method according to claim 2, wherein one of the function relates to a first error which is reported by a customer telephony equipment and to a second error which is detected by the customer-side network transition unit,

a first error monitoring method is performed in the customer telephony equipment,

upon an error being detected by the customer telephony equipment at least one E bit with a value zero is transmitted to the customer-side network transition unit,

the values of the E bits are monitored in the customer-side network transition unit,

a second error monitoring method is performed in the customer-side network transition unit,

and upon an error being detected by the second error monitoring method and when the value zero is detected for the E bit by the customer-side network transition unit at least one Sa5 bit with a value one and at least one Sa6 bit sequence with a value “

0011”

are transmitted via the packet-oriented communication network to the exchange-side network transition unit and are forwarded to the exchanges.

10. The method according to acclaim 2, wherein one of the function relates to the detection of a loss of signal or a loss of frame alignment between a customer telephony equipment and the customer-side network transition unit,

upon a loss being detected in the customer-side network transition unit at least one Sa5 bit with a value one and at least one Sa6 bit sequence with a value “

1100”

are transmitted by the customer-side network transition unit via the packet-oriented communication network to the exchange-side network transition unit and are forwarded to the exchange,

and when a loss is detected by the customer-side network transition unit at least one E bit with the value zero is transmitted to the customer telephony equipment.

11. The method according to claim 1, wherein one of the functions relates to detection of a loss of continuity or a loss of a cell or a loss of cell alignment or a physical connection failure in the packet-oriented communication network,

continuity data packets are generated in the exchange-side network transition unit and transmitted to the customer-side network transition unit,

the continuity data packets are detected in the customer-side network transition unit,

upon non-arrival of the continuity data packets or upon a loss of cell or a loss of cell alignment or a physical connection failure being detected by the customer-side network transition unit, a continuous bit sequence of bits with a value one is transmitted to a customer telephony equipment,

and upon non-arrival of the continuity data packets or upon a loss of cell or a loss of cell alignment or a physical connection failure being detected in the customer-side network transition unit A bits originating from the customer telephony equipment are transmitted unchanged via the packet-oriented communication network,

and upon non-arrival of the continuity data packets or upon a loss of cell or a loss of cell alignment or a physical connection failure being detected by the customer-side network transition unit at least one Sa5 bit with a value one and at least one Sa6 bit sequence with a value “

1110”

are transmitted via the packet-oriented communication network to the exchange-side network transition unit and are forwarded to the exchange.

12. The method according to acclaim 2, wherein one of the functions relates to detection of a loss of signal between the exchange and the exchange-side network transition unit,

upon a loss being detected in the exchange-side network transition unit by the exchange-side network transition unit no further continuity data packets are transmitted via the packet-oriented communication network,

the continuity data packets are monitored in the customer-side network transition unit,

upon non-arrival of the continuity data packets a continuous bit sequence of bits with a value one is transmitted by the customer-side network transition unit to a customer telephony equipment,

upon non-arrival of the continuity data packets in the customer-side network transition unit A bits originating from the customer telephony equipment are transmitted unchanged via the packet-oriented communication network,

and upon non-arrival of the continuity data packets from the customer-side network transition unit at least one Sa5 bit with a value one and at least one Sa6 bit sequence with a value “

1110”

are transmitted via the packet-oriented communication network to the exchange-side network transition unit and are forwarded to the exchange.

13. The method according to claim 1, wherein one of the functions relates to detection of a loss of signal or a loss of frame alignment between a customer telephony equipment and the customer-side network transition unit and to detection of a loss of signal between the exchange and the exchange-side network transition unit,

upon a loss of signal being detected between the exchange and the exchange-side network transition unit in the exchange-side network transition unit no further continuity data packets are transmitted via the packet-oriented communication network,

the continuity data packets are monitored in the customer-side network transition unit,

upon non-arrival of the continuity data packets a continuous bit sequence of bits with a value one is transmitted by the customer-side network transition unit to the customer telephony equipment,

upon non-arrival of the continuity data packets at least one Sa5 bit with a value one and at least one Sa6 bit sequence with a value “

1110”

are transmitted by the customer-side network transition unit via the packet-oriented communication network to the exchange-side network transition unit and from there are forwarded to the exchange,

and upon a loss of signal or a loss of frame alignment being detected between the customer telephony equipment and the customer-side network transition unit and simultaneous non-arrival of the continuity data packets at least one A bit with a value zero is transmitted by the customer-side network transition unit via the packet-oriented communication network to the exchange-side network transition unit and is forwarded to the exchange.

14. The method according to claim 2, wherein one of the function relates to detection of a loss of continuity or a loss of cell or a loss of cell alignment or a physical connection failure between the customer-side network transition unit and the exchange-side network transition unit,

continuity data packets are generated in the customer-side network transition unit and transmitted to the exchange-side network transition unit,

upon non-arrival of the continuity data packets or upon a loss of cell or a loss of cell alignment or a physical connection failure being detected by the exchange-side network transition unit a bit sequence conforming to a predefined auxiliary bit pattern is transmitted to the exchange,

and the exchange, after receiving the bit sequence, transmits an A bit with the value one to the exchange-side network transition unit.

15. The method according to acclaim 2, wherein one of the function relates to detection of a continuous bit sequence of bits with a value one,

an occurrence of the continuous bit sequence of bits with a value one originating from the exchange is monitored in the exchange-side network transition unit,

that when the bit sequence is detected at least one alarm data packet is generated and transmitted via the packet-oriented communication network to the customer-side network transition unit,

the occurrence of alarm data packets is detected in the customer-side network transition unit,

when an alarm data packet is detected by the customer-side network transition unit the continuous bit sequence of bits with a value one is transmitted to a customer telephony equipment,

when an alarm data packet is detected in the customer-side network transition unit A bits originating from the customer telephony equipment are transmitted unchanged via the packet-oriented communication network,

and when an alarm data packet is detected by the customer-side network transition unit at least one Sa6 bit sequence with a value “

1111”

is transmitted via the packet-oriented communication network to the exchange-side network transition unit and is forwarded to the exchange.

16. The method according to claim 2, wherein on of the functions relates to detection of a continuous bit stream of bits with a value one and to detection of a loss of signal or a loss of frame alignment between a customer telephony equipment and the customer-side network transition unit,

an occurrence of the continuous bit sequence of bits with a value one originating from the exchange is monitored in the exchange-side network transition unit,

when the bit sequence is detected at least one alarm data packet is generated and transmitted via the packet-oriented communication network to the customer-side network transition unit,

the occurrence of alarm data packets and the signal and the frame alignment between the customer telephony equipments and the customer-side network transition unit are monitored in the customer-side network transition unit,

when an alarm data packet tis detected by the customer-side network transition unit the continuous bit sequence of bits with a value one is transmitted to the customer telephony equipment,

when an alarm data packet and a loss of signal or a loss of frame alignment is detected, at least one A bit with a value zero is transmitted by the customer-side network transition unit via the packet-oriented data communication network to the exchange-side network transition unit and from there is forwarded to the exchanges,

and when an alarm data packet is detected by the customer-side network transition unit at least one Sa5 bit with a value one and at least one Sa6 bit sequence with a value “

1111”

are transmitted via the packet-oriented communication network to the exchange-side network transition unit and are forwarded to the exchange.

17. The method according to claim 2, wherein one of the functions relates to detection of a voltage failure in the customer-side network transition unit,

the operating voltage is monitored in the customer-side network transition unit,

upon failure of the operating voltage in the customer-side network transition unit at least one Sa6 bit sequence with a value “

1000”

is transmitted via the packet-oriented communication network to the exchange-side network transition unit and is forwarded to the exchange,

upon failure of the operating voltage in the customer-side network transition unit at least one E bit with a value zero is transmitted to a customer telephony equipment,

and the exchange-side network transition unit transmits the Sa6 bit sequence unchanged and subsequently a bit sequence conforming to a predefined auxiliary bit pattern to the exchange.

18. The method according to claim 2, wherein the emulation is implemented by functions of the packet-oriented communication network.

19. The method according to claim 2, wherein the packet-oriented communication network is implemented according to asynchronous transfer mode.

20. The method according to claim 2, wherein the packet-oriented communication network is implemented according to the asynchronous transfer mode Adaption Layer 1 or according to the asynchronous transfer mode Adaption Layer 2.

21. The method according to claim 2, wherein the packet-oriented communication network is implemented according to the Internet Protocol.

22. The method according to claim 2, wherein the time-division multiplex oriented communication network is an ISDN network.

23. The method according to claim 22, wherein part of a primary multiplex access is replaced by the packet-oriented communication network,

and/or the primary multiplex access includes an XDSL line between the customer-side network transition unit and the packet-oriented communication network.

24. The method according to claim 2, wherein operation, administration and maintenance functions are provided essentially according to ETSI standard ETS 300 011 and/or according to ITU-T standard G.962 and/or according to ETSI standard ETS 300 233.

25. The method according to claim 2, wherein a multi time frame including sixteen time frames according to ITU-T standard G.704 is used in the time-division multiplex oriented communication network, the multi time frame including an A bit in a third position and/or an Sa5 bit in a fifth position and/or an Sa6 bit in a sixth position in a start time slot of every second time frame beginning with the second start time slot of the multi time frame,

and/or including an E bit in the first position of the second-to-last time frame and/or the last time frame of a multi time frame.

26. The method according to claim 25, wherein the data of the start time slot of each time frame is transmitted unchanged in value via the packet-oriented communication network.

27. The method according claim 2, wherein located between a customer telephony equipment and the time-division multiplex oriented communication network a broadband subscriber line via which primary multiplex traffic is carried.

28. (Canceled)

29. (Canceled)