METHOD AND DEVICE FOR MANAGING CHANNEL MATRIX

• US 20080317035A1
• Filed: 09/02/2008
• Published: 12/25/2008
• Est. Priority Date: 11/20/2006
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Chen, Zihuan, Zhou, Jun, Long, Guozhu, Fang, Liming, Wei, Dong
• Granted Patent: US 8,391,125 B2
• Time in Patent Office: Days
• US Class Current: 370/395.2
• CPC Class Codes: H04Q 11/04 for time-division multiplexing H04Q11/0001 takes precedence
• CPC Class Codes: H04Q 2213/13039 Asymmetrical two-way transmission, e.g. ADSL, HDSL
• CPC Class Codes: H04Q 2213/13099 Loop multiplexer
• CPC Class Codes: H04Q 2213/13173 Busy signals
• CPC Class Codes: H04Q 2213/1319 Amplifier, attenuation circuit, echo suppressor
• CPC Class Codes: H04Q 2213/13209 ISDN
• CPC Class Codes: H04Q 2213/13335 Simulation, emulation
• CPC Class Codes: H04Q 2213/13349 Network management

Abstract

A method for managing a channel matrix is provided. The method includes: obtaining whether a user logs on or logs off; adding a history record of channel information of the user to a channel matrix when the user logs on; recording current channel information of the user in the channel matrix and deleting the channel information of the user from the channel matrix when the user logs off. The channel matrix may be timely updated based on when the user logs on or off. Accordingly, the channel crosstalk is eliminated timely and correctly according to the channel matrix, and the affection on the crosstalk eliminating capacity caused by the user logs on or logs off can be avoided.

Claims

1. A method for managing a Digital Subscriber Line (DSL) channel matrix, comprising:

determining when a user logs on or logs off;

adding a history record of channel information of the user to a channel matrix when the user logs on; and

recording current channel information of the user in the channel matrix and deleting the channel information of the user from the channel matrix when the user logs off.

2. The method according to claim 1, wherein the history record of the channel information of the user is channel information when the user logged off last time.

3. The method according to claim 1, further comprising:

storing recorded channel information to a database for storing channel information of the user when the user logs off; and

reading the history records of the channel information of the user from the database and adding the history records of the channel information of the user to the channel matrix when the user logs on.

4. The method according to claim 1, further comprising:

performing a tracking to a channel of the user in the channel matrix, and updating the channel information of the user in the channel matrix with adjusted channel information.

5. The method according to claim 1, wherein the channel information of the user comprises direct channel information of the user, crosstalk channel information caused by the user for other users, or crosstalk channel information caused by other users for the user.

6. The method according to claim 1, wherein determining when the user logs on or logs off comprises:

determining when the user logs on or logs off using a DSL Access Multiplex (DSLAM) management layer of a Central Office end.

7. A device for managing a Digital Subscriber Line channel matrix, comprising:

a storage unit that is operable to store a history record of channel information of a user;

a channel matrix unit that is operable to store a channel matrix comprising channel information of a current logging on user;

an obtaining unit that is operable to obtain whether the user logs on or logs off and is operable to send an indication that indicates that the user logs on to the management unit when it is obtained that the user logs on, or send an indication that indicates that the user logs off to the management unit when it is obtained that the user logs off; and

a management unit that is operable to add the history record of the channel information of the user to the channel matrix according to the indication that indicates that the user logs on, and record the channel information of the user in the channel matrix into the storage unit and delete the channel information of the user from the channel matrix according to the indication that indicates that the user logs off.

8. The device according to claim 7, wherein the storage unit is a database storage unit.

9. The device according to claim 7, wherein the obtaining unit is a DSL Access Multiplex management layer entity.

10. The device according to claim 7, further comprising:

a tracking unit that is operable to track channels of logging on uses and send adjusted channel information to the channel matrix unit to update the channel information of the logging on users in the channel matrix.

11. A Digital Subscriber Line Access Multiplexer comprising:

an obtaining unit that is operable to obtain whether a user logs on or logs off;

a notification unit that is operable to send an indication that indicates that the user logs on to the management unit when it is obtained that the user logs on, or send an indication for indicating that the user logs off to the management unit when it is obtained that the user logs off; and

a management unit that is operable to add a history record of channel information of the user to a channel matrix according to the indication that indicates that the user logs on, and record the channel information of the user in the channel matrix, and delete the channel information of the user from the channel matrix according to the indication that indicates that the user logs off.

12. The DSLAM according to claim 11, further comprising:

a tracking unit that is operable to track channels of logging on users and update the channel information of the logging on users in the channel matrix with adjusted channel information.

13. A method for eliminating a crosstalk, comprising:

obtaining whether a user logs on or logs off;

adding a history record of channel information of the user to a channel matrix when the user logs on;

recording current channel information of the user in the channel matrix and deleting the channel information of the user from the channel matrix when the user logs off; and

eliminating the crosstalk on a channel of the user according to the channel matrix.

14. The method according to claim 13, further comprising:

tracking channels in the channel matrix, and

updating the channel information of the users in the channel matrix with adjusted channel information.

15. The method according to claim 13, wherein eliminating the crosstalk according to the channel matrix comprises:

eliminating the crosstalk between users with QR decomposition method or SVD decomposition method according to the channel matrix.

16. A computer readable media, comprising logic encoded in the computer readable media, the logic when executed operable to:

determine when a user logs on or logs off;

add a history record of channel information of the user to a channel matrix when the user logs on; and

record current channel information of the user in the channel matrix and delete the channel information of the user from the channel matrix when the user logs off.

17. The computer readable media of claim 16, comprising logic that is also operable to:

store recorded channel information to a database for storing channel information of the user when the user logs off; and

read the history records of the channel information of the user from the database and adding the history records of the channel information of the user to the channel matrix when the user logs on.

18. The computer readable media of claim 16, comprising logic that is also operable to:

perform a tracking to a channel of the user in the channel matrix, and

update the channel information of the user in the channel matrix with adjusted channel information.

19. The computer readable media of claim 16, comprising logic that is also operable to:

eliminate the crosstalk on a channel of the user according to the channel matrix.

20. The computer readable media of claim 19, comprising logic that is also operable to:

eliminate the crosstalk between users using QR decomposition or SVD decomposition according to the channel matrix.