公开(公告)号：US20160352499A1

公开(公告)日：2016-12-01

申请号：US15114942

申请日：2015-01-28

Applicant: BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY

Inventor： Richard GEDGE ,  Chi-Fai LAU ,  Simeon P WILLIAMSON

IPC: H04L7/00 ,  H04B17/336 ,  H04M3/00

CPC classification number: H04L7/0016 ,  H04B3/32 ,  H04B17/336 ,  H04L1/0002 ,  H04M3/007 ,  H04M11/062

Abstract: This invention relates to a method of determining an optimum point at which to synchronise a digital subscriber line in a telecommunications network, with the aim of maximising the resulting synchronisation rate whilst maintaining a stable line. For many lines, the signal to noise ratio (SNR) varies over the course of a day, and recurs on a daily basis. The phenomenon is often referred to as the “diurnal effect”. The SNR history for the line is monitored, and the minimum SNR for the line is determined over a 24 hour period to take into account the diurnal effect. The current target SNR margin imposed by DLM on the line is determined, for example, by interrogating the DLM system or by noting the SNR margin on the line immediately after the most recent line synchronisation. The optimum point at which a resynchronisation is to be performed is calculated as point when the SNR on the line is equal to the minimum SNR plus the current target SNR margin. Synchronising when the SNR is at this point should maximise the synchronisation rate, whilst still maintaining a stable line.

Abstract translation: 本发明涉及确定使电信网络中的数字用户线路同步的最佳点的方法，其目的是在保持稳定的线路的同时最大化所得到的同步速率。 对于许多线路，信噪比（SNR）在一天内变化，并且每天重复。 这种现象通常被称为“昼夜效应”。 监测线路的SNR历史，并且在24小时内确定该线路的最小信噪比以考虑日间效应。 DLM在线上施加的当前目标SNR余量例如通过询问DLM系统或通过在最近的线路同步之后立即注意线路上的SNR余量来确定。 当线路上的SNR等于最小SNR加上当前目标SNR余量时，计算要执行重新同步的最佳点被计算为点。 当SNR处于这一点时同步应该使同步速率最大化，同时仍保持稳定的线路。