Method and device for managing channel matrix

• US 8,391,125 B2
• Filed: 09/02/2008
• Issued: 03/05/2013
• 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: Zhou, Jun, Wei, Dong, Fang, Liming, Chen, Zihuan, Long, Gouzhou
• Primary Examiner(s): Weidner, Timothy J
• Application Number:
  US12/202,921
• Publication Number:
  US 20080317035A1
• Time in Patent Office: 1,645 Days
• Field of Search: None
• US Class Current: 370/201
• 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 whether a user logs on or logs off;

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

recording current channel information of the user in the DSL channel matrix, storing the recorded current channel information to a database for storing channel information of the user and deleting the current channel information of the user from the DSL 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 recorded when the user logged off last time.

3. The method according to claim 1, wherein adding a history record of channel information of the user to the DSL channel matrix comprises:

reading the history record of the channel information of the user from the database and adding the history record of the channel information of the user to the DSL channel matrix.

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

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

5. The method according to claim 1, wherein the current 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 whether the user logs on or logs off comprises:

determining whether 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 (DSL) channel matrix, comprising:

a storage unit configured to store one or more history records of channel information of one or more users;

a channel matrix unit configured to store the DSL channel matrix comprising channel information of one or more current logged on users;

an obtaining unit configured to obtain logging information about whether a user logs on or logs off and configured to send an indication to a management unit indicating that the user logs on when the user logs on, or send an indication to the management unit indicating that the user logs off when the user logs off; and

the management unit configured to add a history record of channel information of the user to the DSL channel matrix from the storage unit according to the indication indicating that the user logs on, and record channel information of the user in the DSL channel matrix into the storage unit and delete channel information of the user from the DSL channel matrix according to the indication indicating 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 configured to track channels of logging on users and send adjusted channel information to the DSL channel matrix unit to update current channel information of the logging on users in the DSL channel matrix.

11. A Digital Subscriber Line Access Multiplexer comprising:

an obtaining unit configured to obtain logging information about whether a user logs on or logs off;

a notification unit configured to send an indication to a management unit indicating that the user logs on when the user logs on, or send an indication to the management unit indicating that the user logs off when the user logs off; and

the management unit configured to add a history record of channel information of the user to a channel matrix according to the indication indicating that the user logs on, record channel information of the user in the channel matrix, and delete current channel information of the user from the channel matrix according to the indication indicating 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 current channel information of the logging on users in the channel matrix with adjusted channel information.

13. A method for eliminating a crosstalk, comprising:

obtaining logging information about 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 current 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 and adjusting channel information of all users in the channel matrix, and

updating current channel information of all users in the channel matrix with the 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 of a matrix or singular value decomposition (SVD) method according to the channel matrix.