We propose and experimentally investigate a highly reliable WDM-PON system. The proposed system adopts the
colorless solution. It can detect the failure of the feeder fiber by the polling and restoring mechanism of the system
management module, and then trigger the OSW switching to the preplanned path for restoring the disrupted traffic, and
produce a broken fiber alarm if needed. The system management module can send polling frames to ONUs periodically
and judge whether it is necessary to send trigger signals to the OSW according to the number of ONUs registered in line
cards. The preplanned path is the feeder fiber of the neighboring line card. This system can automatically protect against
the feeder fiber failures without duplicating the feeder fiber link. The OTDR or optical power meter can be saved which
is used for on-line monitoring. Its restoration time is less than 16ms in experiments.
This paper firstly analysed the requirements of IMS-based service network convergence; and then introduced the
network architecture and features of IMS, IMS service creation environment, IMS-based next generation network
convergence architecture, and IMS-based service convergence platform. Then the paper proposed an implementation of
IMS service triggering mechanism. Finally, the paper discussed the problems existing in service convergence.
This paper firstly elaborates the structure and characteristics of IMS, then discusses the HA architecture design for IMS
core network. It also puts forward an HA solutions in terms of Service processing, Platform software, network topology
and switch strategy. The backup mechanism of each module is described in detail.
This paper provides current status and future trends of FTTH in mainland of China. It discusses current FTTH research, development and deployment status in China, including technology choices, deployment considerations, major equipment vendors and carriers, standardizations, market barriers and opportunities.
Proc. SPIE. 6022, Network Architectures, Management, and Applications III
KEYWORDS: Internet, Digital signal processing, Fiber to the x, Networks, Control systems, Telecommunications, Computer architecture, Broadband telecommunications, Network architectures, Standards development
With the development of broadband services, it is realized that access network becomes the bottleneck. After the introduction of FTTH system, this paper discusses the home gateway in detail. As an extension of FTTH system, the home gateway can be used as a bridge to
interconnect intelligent home systems and outside networks. Home gateway has a great potential market. Based on the analysis of the architectures of software and hardware and the implementation models, the paper discusses key technologies and standards of home gateway.