摘要:
A clock synchronization method, customer premises equipment and a clock synchronization system are provided. The customer premises equipment reads a first time stamp when receiving a first specific position of a first DMT signal sent by central office equipment; reads a second time stamp when sending a second specific position of a second DMT signal; receives a third time stamp and a fourth time stamp that are sent by the central office equipment through a data information channel. The third time stamp is read when the central office equipment sends the first specific position of the first DMT signal, and the fourth time stamp is read when the central office equipment receives the second specific position of the second DMT signal. The customer premises equipment adjusts a clock of the customer premises equipment according to the first, second, third and fourth time stamps.
摘要:
A method, apparatus, and system for time synchronization are disclosed. The method comprising: obtaining a master sending time stamp, a slave receiving time stamp, a slave sending time stamp, and a master receiving time stamp; and adjusting the time of the slave clock according to the offset calculated from the time stamps to synchronize with the clock time of the master clock. With the present invention, in passband transmission systems that transmit signals continuously in units of symbols, the time synchronization is implemented between the master clock and the slave clock.
摘要:
A clock synchronization method, customer premises equipment and a clock synchronization system are provided. The customer premises equipment reads a first time stamp when receiving a first specific position of a first DMT signal sent by central office equipment; reads a second time stamp when sending a second specific position of a second DMT signal; receives a third time stamp and a fourth time stamp that are sent by the central office equipment through a data information channel. The third time stamp is read when the central office equipment sends the first specific position of the first DMT signal, and the fourth time stamp is read when the central office equipment receives the second specific position of the second DMT signal. The customer premises equipment adjusts a clock of the customer premises equipment according to the first, second, third and fourth time stamps.
摘要:
A method, apparatus, and system for time synchronization are disclosed. The method comprising: obtaining a master sending time stamp, a slave receiving time stamp, a slave sending time stamp, and a master receiving time stamp; and adjusting the time of the slave clock according to the offset calculated from the time stamps to synchronize with the clock time of the master clock. With the present invention, in passband transmission systems that transmit signals continuously in units of symbols, the time synchronization is implemented between the master clock and the slave clock.
摘要:
A method for determining reference virtual noise of Digital Subscriber Line (DSL), includes: obtaining a receiver-end-actual noise of DSL subcarriers; and determining a reference virtual noise according to the obtained receiver-end-actual noise of the DSL subcarriers. Furthermore, the invention also discloses a device for determining a reference virtual noise of DSL, and a method and a system for configuring the reference virtual noise of DSL. The invention can improve the accuracy of the reference virtual noise, thereby making the configuration of the reference virtual noise more accurate.
摘要:
A method for determining reference virtual noise of Digital Subscriber Line (DSL), includes: obtaining a receiver-end-actual noise of DSL subcarriers; and determining a reference virtual noise according to the obtained receiver-end-actual noise of the DSL subcarriers. Furthermore, the invention also discloses a device for determining a reference virtual noise of DSL, and a method and a system for configuring the reference virtual noise of DSL. The invention can improve the accuracy of the reference virtual noise, thereby making the configuration of the reference virtual noise more accurate.
摘要:
The present disclosure includes a method for acquiring DSL parameters, a module for acquiring Digital Subscriber Line (DSL) parameters, and a line management system. The method includes: obtaining the priority of a DSL; and acquiring parameters of the DSL in an acquisition period corresponding to the obtained priority, in accordance with a preset corresponding relationship between the priority of the DSL and the acquisition period. The system includes: a module for acquiring DSL parameters, configured to obtain the priority of a DSL and acquire parameters of the DSL in an acquisition period corresponding to the obtained priority in accordance with a preset corresponding relationship between the priority of the DSL and the acquisition period; a database configured to store the parameters acquired by the module for acquiring DSL parameters; a line management module configured to manage the DSL using the DSL parameters.
摘要:
A method for improving line stability, an adjusting apparatus and a system are provided. The method includes determining an Operating Performance Value (OPV) on a current Digital Subscriber Line (DSL); and if the OPV is below a preset Target Performance Value (TPV), adjusting Management Information Base (MIB) parameters in a line template. The apparatus includes a determining unit and an adjusting unit. With the provided method, apparatus, and system, the error correction capability of the DSL line can be updated with the actual bit error ratio to adapt to a complex environment and to improve the line stability.
摘要:
A method and system for managing a line topology is provided by the embodiments of the disclosure. The method for managing a line topology includes obtaining an actual transfer function of the line according to the actual transfer function of the line and a transfer function of the bridge tap model, estimating a diameter and length of the bridge tap of the line and a diameter and length of the trunk line of the line according to the estimated diameter and length of the bridge tap and the diameter and length of the trunk line, obtaining a transfer function of the line model that includes the location parameter of the bridge tap by comparing the error between the actual transfer function and the transfer function of the line model which includes the location parameter of the bridge tap, estimating the position of the bridge tap according to the estimated diameter and length of the trunk line and the diameter and length of the bridge tap and the location of the bridge tap, and generating a topology of the line. By applying the embodiment of the disclosure to maintain and manage the line topology, the location of the bridge tap can be estimated effectively, and the line topology can be obtained.
摘要:
A method and system for managing a line topology is provided by the embodiments of the disclosure. The method for managing a line topology includes obtaining an actual transfer function of the line according to the actual transfer function of the line and a transfer function of the bridge tap model, estimating a diameter and length of the bridge tap of the line and a diameter and length of the trunk line of the line according to the estimated diameter and length of the bridge tap and the diameter and length of the trunk line, obtaining a transfer function of the line model that includes the location parameter of the bridge tap by comparing the error between the actual transfer function and the transfer function of the line model which includes the location parameter of the bridge tap, estimating the position of the bridge tap according to the estimated diameter and length of the trunk line and the diameter and length of the bridge tap and the location of the bridge tap, and generating a topology of the line. By applying the embodiment of the disclosure to maintain and manage the line topology, the location of the bridge tap can be estimated effectively, and the line topology can be obtained.