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.
In this paper, technique theory of EPON is introduced at first. At the same time, MAC frame structure, automatic
detection and ranging of MPCP, DBA,and multi-LLID of EPON is analyzed. Then, service development ability, cost
advantage and maintenance superiority based on EPON technology are carried out. At last,with Cost comparison
between FTTH / FTTB building model and the traditional model, FTTB + LAN mode which is suitable for the newadding
residential users in general areas and FTTN + DSL mode which is suitable for the old city and rural access
network transformation are built up in detail. And FTTN + DSL project of rural information in rural areas and FTTH
broadband HOUSE project on service solutions program are analyzed.
comparing to the traditional access technologies, EPON technology has the obvious advantages, such as distance
transmission, high or wide band, saving line resources, service abilities, etc. These are the qualities which not only be
served for home users, but solve more access problems for us effectively.
OAM plays an important role in PTN technology. The main function of OAM is check defect before abnormal event.
The bit errors which could be corrected or time deviation could be isolated within a certain range. It dose not disturb
network operation. And therefore, it ensure carrier to fulfill QoS commitment and reach SLA subscription.T-MPLS is
connection-oriented packet transport technology. Connection-oriented means it can provide carrier-level service and
must have equal OAM (Operation, Administration and Maintenance) function of traditional transport network. OAM
mechanism becomes key technology of T-MPLS.
OAM function is very important to telecom network. It's especially import to network which has QoS. OAM could
simplify network operation, check network performance and reduce operation cost.
Firstly, the functional requirements of T-MPLS OAM and MPLS-TP OAM are analyzed. The similarity of T-MPLS
OAM and MPLS-TP OAM is founded. By deep analysis the mechanism of T-MPLS OAM, it shows that the OAM is
import for PTN. Then OAM technique of T-MPLS and MPLS-TP is analyzed in detail. At last, analysis of commonality
is carried out on function types. Domain reference model and nesting-technique shows the consistency of both OAM
Both of T-MPLS and MPLS-TP introduce OAM nesting. Eight MEG Levels (from 0 to 7) are available to
accommodate different network deployment scenarios. In order to distinguish OAM packets of nested MEGs, each MEP
tunnels incoming OAM packets by incrementing the MEL in the source direction and decrementing it in the sink
direction. Each MEP/MIP generates and processes OAM packets at the MEL=0, while other OAM packets are forwarded
with traffic. It's very simple and high efficiency method.
By comparing the functions of T-MPLS OAM and MPLS-TP OAM, even there are few differences on PTN
implementation detail; the OAM mechanism and framework are basically same. Both of them meet the requirements of
carrier-grade OAM. They has important role in their realization process. As long as posses powerful OAM capability,
PTN has more competitiveness in the future market.
In proportion to the rapid development of telecommunication service, Telecom Operators already have made a strategic
transition from "Network, Communication Operators" into "integrated information service provider" to provide
customer with varied information service, such as the BT "21st century plan", "Next" plan proposed by France Telecom,
FNE and BMS plan by Australia Telstra, RANE Programs by NTT. Domestic Carries also made strategic transition
plans. And the priority of network transition is to find the way to build a unified and integrated network supporting
carrier-grade Ethernet service also compatible with the conventional network service.
The division of the service results in the Packet transmission, namely packet technology, makes Packet-based
Transmission Network keeping the virtues of transmission network. The virtues are good scalability, varied operation
and maintenance, high-speed protection switching, connection-oriented feature, and building up connection with NMS.
At the same time, it adds some characteristics to adapt the statistical multiplexing in the packet service, for instance:
connection-oriented label switching, QoS mechanism, dynamic and flexible control plane. The Packet Transmission
Network (PTN) can be divided into four layers: packet transmission channel layer (PTC), packet transmission path layer
(PTP), and optional packet transmission section Layer (PTS) and physical layer.
The key technologies of PTN are as follows: the connection-oriented based label transmission and the statistical
multiplexing on packet switching. The use of layer and sub-domain is to provide good scalability. Supporting for fault
detection and performance testing and other Operation, Management and Maintenance (OAM) function, linear protection
switching, ring protection, dynamics survival technology of pre-placed re-route, QoS, circuit emulation for TDM service,
ATM based on PWE3 technique, and MAC layer or physical layer based packet clock synchronization.
The application PTN could be convergence of packet service in MAN, such ads DSLAM backhauling, wireless
Backhauling and so on. PTN can also take replace the core router in the core network to carry out the high efficient
transmission of packet service.
It is because the MSTP based on SDH has developed to be regional multi-service communication network come from the
need of LAN-interlink and the new data traffic that the study of encapsulation protocol of MSTP data service over SDH
has become especially important. This paper firstly analyzes three kinds of encapsulation protocols which are based on
SDH to transport data. The three protocols are GFP, LAPS and PPP, and the study emphases on the encapsulation mode,
frame structure, function mode and currency disposal process of the GFP. At last it introduces the GFP's applications in
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.
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.
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.
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.
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.
The future of TMN in ITU-T will be heavily influenced by new telecom technologies, such as IP, and associated management needs. To meet this challenge, SG 4 has adopted two approaches. Current focus of ITU-T SG4 is common working methods for specifying protocol-neutral TMN requirements and information/models and identification of key management technologies to meet future needs. ITU-T SG4 has successfully set up the CORBA framework. The core is re-using the CORBA Common Object Services. ITU-T defines a set of CORBA interfaces for the CORBA generic information model. These interfaces are translated manually from a set of M.3100 GDMO managed object classes following the TMN CORBA framework and guidelines. Although TMN CORBA framework has finished, it still raises new issues, such as implementation conformance and complexity of additional services. It is remarkable that China has made great progress on CORBA-based network management standardization. ITU-T adopts some correlative technologies. SG4 agreed to define the Integrated Management of Hybrid Circuit Switched and Packet/IP Networks. SG4 also make progress in tML, Qos, ETS.
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.