With the rapid development of telecommunication service, the broadband amalgamation of full service is becoming the
main theme in the development of communication industry. The Packet Transmission Network adopts the technique of
T-MPLS to meet next generation's demand on high speed, various services and high quality. Firstly, Requirements of
PTN (Packet Transmission Network)are analyzed. Then, by deep analysis the key technology of PTN on MAN. At the
same time, PTN technologies have been applied in multi-service's adaptation and transmission which are carried out by
communication each other of MSTP and PTN, T-MPLS and IP/MPLS, PBT and IP/MPLS. At last, test of PTN are analyzed in detail. Test results of PTN show that PTN can replace core router to provide highly-efficient packet forward service in core network.
With rapid development of Internet and broadband access network, the technologies of xDSL, FTTx+LAN
, WLAN have more applications, new network service emerges in endless stream, especially the increase of network
game, meeting TV, video on demand, etc. FTTH supports all present and future service with enormous bandwidth,
including traditional telecommunication service, traditional data service and traditional TV service, and the future digital
TV and VOD. With huge bandwidth of FTTH, it wins the final solution of broadband network, becomes the final goal of
development of optical access network..
Fiber to the Home (FTTH) will be the goal of telecommunications cable broadband access. In accordance with the
development trend of telecommunication services, to enhance the capacity of integrated access network, to achieve
triple-play (voice, data, image), based on the existing optical Fiber to the curb (FTTC), Fiber To The Zone (FTTZ), Fiber
to the Building (FTTB) user optical cable network, the optical fiber can extend to the FTTH system of end-user by using
The article first introduced the basic components of FTTH system; and then explain the reference model and reference
point for testing of the FTTH system; Finally, by testing connection diagram, the testing process, expected results,
primarily analyze SNI Interface Testing, PON interface testing, Ethernet performance testing, UNI interface testing,
Ethernet functional testing, PON functional testing, equipment functional testing, telephone functional testing,
operational support capability testing and so on testing of FTTH system. ...
Broadband connectivity to Internet has quickly become one of the most successful telecom service offerings ever. The
meeting and marketplace of the future requires Full-Service Broadband. Full Service Broadband encompasses a unique
combination of products and experience that will enable operators and network providers to meet this emerging demand
for anywhere access to broadband services, quickly, cost-effectively and with minimal risk.
Firstly, the standard of PTN (Packet Transmission Network) are analyzed. Then ,by deep analysis the key technology of
PTN on MAN. The key technologies of PTN on MAN can be divided into two group: PBT, PBBREP, RRPP, ERP
technology, and Carrier Ethernet with MPLS technology. At the same time, communication each other of MSTP and
PTN,T-MPLS and IP/MPLS ,PBT and IP/MPLS are carried out by figures. At last, testing of PTN are analyzed, testing
contents mainly include:
TDM service function of PTN equipment, long time BER capability of STM-1service, time delay capability of PTN
equipment, protection and provisioned backup path function of T-MPLS, Wrapping protection a function of T-MPLS
loop network,and OAM functions.
OAM function is very important to telecommunication network. Especially to the networks that need to
supply QoS, OAM could simplify network operation, check network performance and decrease network operation cost.
As the important and extensible carrier technology of next generation network, OAM enables that MPLS could supply
multiple services capability with QoS.
In this paper, MPLS OAM technique theory and protection are introduced at first. In the introduction, 1:1 protection and
1:1 protection are analyzed; Then, the MPLS OAM key technique is analyzed; At last, it configures the MPLS OAM
protection and checks static LSP connection in detail. So, MPLS OAM will be very important to telecommunication of
With the continued rapid growth of Internet, new network service emerges in endless stream, especially the
increase of network game, meeting TV, video on demand, etc. The bandwidth requirement increase continuously.
Network technique, optical device technical development is swift and violent. FTTH supports all present and future
service with enormous bandwidth, including traditional telecommunication service, traditional data service and
traditional TV service, and the future digital TV and VOD. With huge bandwidth of FTTH, it wins the final
solution of broadband network, becomes the final goal of development of optical access network.
Firstly, it introduces the main service which FTTH supports, main analysis key technology such as FTTH system
composition way, topological structure, multiplexing, optical cable and device. It focus two kinds of realization
methods - PON, P2P technology. Then it proposed that the solution of FTTH can support comprehensive access
(service such as broadband data, voice, video and narrowband private line). Finally, it shows the engineering
application for FTTH in the district and building. It brings enormous economic benefits and social benefit.
With the rapid development of digital networks, many of the appliances in life are widely used, particularly in wireless
LAN and IP telephony. Ethernet-based data terminals have been widely used in many areas, although the device's power
consumption is low, but in general stability and reliability of the power is of very high requirements.
In this paper, PoE technology (a solution focused on long-distance power supply system) is focused on the PoE power
supply equipment, power-operation process, the system configuration management, automatic detection, and other major
Also, at the same time it introduces the use of PoE technology for wireless access points designed to supply power as a
kind of typical application in the local network, the programme through the network to provide power system solutions,
and expand the use of PoE equipment and make full use of the existing network resources, providing users with
convenient and stable service.
Based on digitization, multimedia, mobility, wide band, real-time interaction and so on,family networks, because can
provide diverse and personalized synthesis service in information, correspondence work, entertainment, education and
health care and so on, are more and more paid attention by the market. The family network product development has
become the focus of the related industry.
In this paper,the concept of the family network and the overall reference model of the family network are introduced
firstly.Then the core techniques and the correspondence standard related with the family network are proposed.The key
analysis is made for the function of family gateway, the function module of the software,the key technologies to client
side software architecture and the trend of development of the family network entertainment seeing and hearing service
and so on. Product present situation of the family gateway and the future trend of development, application solution of
the digital family service are introduced. The development of the family network product bringing about the digital
family network industry is introduced finally.It causes the development of software industries,such as communication
industry,electrical appliances industry, computer and game and so on.It also causes the development of estate industry.
Now, most favors fiber access is mainly the EPON fiber access system. Inheriting from the low cost of Ethernet,
usability and bandwidth of optical network, EPON technology is one of the best technologies in fiber access and is
adopted by the carriers all over the world widely.
According to the scheme analysis to FTTH fan-end equipment, hardware design of ONU is proposed in this paper.
The FTTH far-end equipment software design deference modulation design concept, it divides the software
designment into 5 function modules: the module of low-layer driver, the module of system management, the
module of master/slave communication, and the module of main/Standby switch and the module of command line.
The software flow of the host computer is also analyzed. Finally, test is made for Ethernet service performance of
FTTH far-end equipment, E1 service performance and the optical path protection switching, and so on. The results
of test indicates that all the items are accordance with technical request of far-end ONU equipment and possess
good quality and fully reach the requirement of telecommunication level equipment.
The far-end equipment of FTTH divides into several parts based on the function: the control module, the exchange
module, the UNI interface module, the ONU module, the EPON interface module, the network management
debugging module, the voice processing module, the circuit simulation module, the CATV module.
In the downstream direction, under the protect condition, we design 2 optical modules. The system can set one
group optical module working and another group optical module closure when it is initialized. When the optical
fiber line is cut off, the LOS warning comes out. It will cause MUX to replace another group optical module,
simultaneously will reset module 3701/3711 and will make it again test the distance, and will give the plug board
MPC850 report through the GPIO port. During normal mode, the downstream optical signal is transformed into the
electrical signal by the optical module.
In the upstream direction, the upstream Ethernet data is retransmitted through the exchange chip BCM5380 to the
GMII/MII in module 3701/3711, and then is transmitted to EPON port. The 2MB data are transformed the Ethernet
data packet in the plug board TDM, then it's transmitted to the interface MII of the module 3701/3711.
The software design of FTTH far-end equipment compiles with modulation design concept. According to the
system realization duty, the software is divided into 5 function modules: low-level driver module, system
management module, master/slave communication module, the man/Standby switch module and the command line
The FTTH far-end equipment test, is mainly the Ethernet service performance test, E1 service performance test and
the optical path protection switching test and so on the key specification test.
With the successful application of DSL technology, the gradual popularization of FTTH technology, and the evolution
from traditional network to NGN, the trend of IP business bearing has been formed. In the future, the optical
transmission network of the entire business operations will be primarily responsible for the IP / Ethernet traffic
transmission, the optimization of the characteristics of data flow in groups, and will develop in a direction of smart,
integrated, broadband, efficient and reliable packet transmission technology (PTN). The PTN based on T-MPLS
technology, supporting all types of business (Ethernet, IP / MPLS, FR, ATM, TDM,...), simultaneously supporting
general users (wired / wireless) and commercial users in various types of business development, would become a new
generation of converged networks of PTN platform. This article analyzes the crucial technologies of PTN in respects of
the T-MPLS system of the framework agreement, the hierarchical structure, the network model, operational capacity,
protection switching mechanism, etc, and puts forward a PTN-building program facing the entire business operations.
With service competitions of carriers aggravating and client's higher service experience requirement, it urges the
MAN technology develops forward. When the Core Layer and Distribution Layer technology are mature, all kinds
of reliability technologies of MAN access Layer are proposed. EoRPR is one of reliability technologies for MAN
access network service protection. This paper elaborates Ethernet over RPR technology's many advantages through
analyzing basic principle, address learning and key technologies of Ethernet over RPR. EpRPR has quicker
replacing speed, plug and play, stronger QoS ability, convenient service deployment, band fairly sharing, and so
on. At the same time the paper proposed solution of Ethernet over RPR in MAN, NGN network and enterprise
Private network. So, among many technologies of MAN access network, EoRPR technology has higher reliability
and manageable and highly effectiveness and lower costive of Ethernet. It is not only suitable for enterprise
interconnection, BTV and NGN access services and so on, but also can meet the requirement of carriers' reducing
CAPEX and OPEX's and increase the rate of investment.
On propagation characteristic of material surface wave in laser ultrasonic, researching Fizeau fiber
interferometer system which implements measure of SAW on YAG laser. Based on interference principle in
common laser path, it eliminates a good many shortcomings in measurement means of other SAW, possess low
environment demand, simple configuration, easy adjustment, high frequency response and no contacted
measurement, highly adapts to laser ultrasonic measure.
On propagation characteristic of material surface wave in laser ultrasonic, design of laser ultrasonic measure system have attracted the extensive attention and recognition. Laser ultrasonic technology is on studying material structure, characters, parameters (thickness, density, flexibility module), now as a important means and development aspect it has been used to detect whether material is scatheless. Firstly, this paper introduces Test principle of Fizeau Fiber Interferometer, and designs the measure system based on laser
SAW. Finally through experiment data, this system provides high sensitivity of laser ultrasonic and also has the merits of
no contacted measurement, high space resolution of laser ultrasonic, low environment demand, simple configuration, easy adjustment and high frequency response, highly adapts to laser ultrasonic measure.
With high-speed development of information technology, the demand for multi-media image processing has become
more and more urgent. According to characters of embedded system and video image, the paper proposes an embedded
system that can recognize the moving objects in video stream, and give the realization of hardware and software.
Experiment result shows that system have a good effect in better light.
This paper introduced fiber interferometer from the characteristic and theory of laser ultrasonic to improve the detect
efficiency of laser ultrasonic. It designed laser ultrasonic inspection system. This system provides high sensitivity of
laser ultrasonic and has general character of acoustic surface wave. It also has the merits of non-contact, broadband and
high space resolution of laser ultrasonic.
Proc. SPIE. 6784, Network Architectures, Management, and Applications V
KEYWORDS: Interfaces, Networks, Telecommunications, Technologies and applications, Broadband telecommunications, Information security, Home entertainment, Network security, Instrument modeling, Home networking
It is the research hotspot of current broadband network to combine voice service, data service and broadband audio-video
service by IP protocol to transport various real time and mutual services to terminal users (home). Home Networking is
a new kind of network and application technology which can provide various services.
Home networking is called as Digital Home Network. It means that PC, home entertainment equipment, home
appliances, Home wirings, security, illumination system were communicated with each other by some composing
network technology, constitute a networking internal home, and connect with WAN by home gateway. It is a new
network technology and application technology, and can provide many kinds of services inside home or between homes.
Currently, home networking can be divided into three kinds: Information equipment, Home appliances, Communication
Equipment inside home networking can exchange information with outer networking by home gateway, this information
communication is bidirectional, user can get information and service which provided by public networking by using
home networking internal equipment through home gateway connecting public network, meantime, also can get
information and resource to control the internal equipment which provided by home networking internal equipment.
Based on the general network model of home networking, there are four functional entities inside home networking:
HA, HB, HC, and HD. (1) HA (Home Access) - home networking connects function entity; (2) HB (Home Bridge)
Home networking bridge connects function entity; (3) HC (Home Client) - Home networking client function entity; (4)
HD (Home Device) - decoder function entity. There are many physical ways to implement four function entities.
Based on theses four functional entities, there are reference model of physical layer, reference model of
link layer, reference model of IP layer and application reference model of high layer.
In the future home network should have broadband network function, public network function, and
compositive multi-service and multi-application function, etc.
With the development of backbone communication network, EPON will be the main method for broadband access
techniques.EPON has 1Gb/s broadcast ability in downstream. This paper researches DDBA (downstream dynamic
bandwidth allocation) management and traffic control mechanisms, and brings forward a LLID (end user) based solution.
The emulation results show the proposed solution supports high priority delay sensitive service such as TDM E1
perfectly, and also keep the high throughput.
With wide development of communication network and IP technology, effective management of network switch
becomes an important problem. Cluster management technology enables to effectively realize network management of
LAN, CAN, MAN. On CTP and CMP protocol, it implements HTTP and Console mode of network
management. Testing result indicates that it effectively economize IP address resource. At the same time, solution
projects of cluster management meet the demand of campus network, enterprise network and other network, have
advantages of low cost, simple configuration and easy maintenance.
FTTH supports present and future all services and becomes the finally solution of connecting the first kilometer wide band by its giant bandwidth ability. Through analyzing each kind of FTTH network plan, this article proposes four constitute ways of the FTTH: two waves single stages P-P, two waves two stages P-P, two waves PON and three waves PON. Then, we analyze transmission protocol of FTTH system. Finally we introduced FTTH overall request for FTTH system.
This paper analyses the characteristics and architecture of EPON system. We probe two management methods. Based on EPON management resources, information models could be defined in dependent of deployment technology. In the end we discuss functional architecture of EPON management system.
Currently, network administration involves repetitive and time-consuming tasks. Clustering enables network administrators to overcome hurdles when they attempt to manage their LANs. Clustering is proved to be a breakthrough for LANs. Under the cluster management model, all switches can be managed as a cluster based on a single IP address. A single command switch for each cluster would automatically discover and control all switches in a cluster, regardless of where they are located. Switch Clustering is implemented over the TCP/IP protocol. The hardware scheme is present in this paper. Then the cluster communication protocol is analyzed in detail. It involves CTP (Cluster Topology Protocol) and CMP (Cluster Management Protocol). At last we present two typical examples for Switch Clustering.