Fujitsu Corporation

Wilson Kit-man Chan

Junji Yamamoto

Larry Henry Steinhorst

Sunan Han

According to one embodiment of the invention, a method for providing communications service in a communications ring undergoing an upgrade process includes increasing an existing rate of a node to a higher rate. With the increase, the node is operable to transmit a second frame at the higher rate. The second frame has a higher number of time slots than a first frame having a number of slots equal to N. The method also includes occupying a number of the time slots of the second frame equal to N using data to be received by an existing node. The method also includes providing at least one identifier to the existing node that will receive the second frame. The identifier identifies the occupied time slots of the second frame. The method also includes transmitting the second frame of data to the existing node.

Method and system for upgrading a fiber optics network

In one embodiment, a facilitating signal broadcasting includes receiving a first copy of a signal at a first selector of a first headend, where the first copy is received through a first receive pipe of a first ring. A second copy of the signal is received at the first selector, where the second copy is received through a second receive pipe of a second ring. The first selector selects either the first copy or the second copy. The selected copy is sent through a first transmit pipe of the first ring.

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Richardson, TX, United States of America

Wilson Kit-man Chan