Tài liệu Thực hiện chất lượng dịch vụ trong các mạng IP (P10) ppt
Tài liệu Thực hiện chất lượng dịch vụ trong các mạng IP (P10) ppt
... Protocol
(IP) . IP- based applications have been in wide-scale use since the
development of Transfer Control Protocol (TCP) in the 1980s.
The application programming interface (API) of TCP /IP has ... real-time services requires
that new technologies be added to basic IP. The most demanding ser-
vices such as Voice over IP (VoIP)and streamed multimedia typically
10.2 DIFFSERV 301
consis...
Tài liệu Thực hiện chất lượng dịch vụ trong các mạng IP (P8) pptx
... access
domain, and egress policing, when used, can be based on network
destination.
IP domain
IP domain
IP domain
IP domain
IP domain
Endpoint
Endpoint
QA
QA
QA
QA
Figure 8.5 Funnels in Schel
´
en’s scheme
8.1 ... bandwidth
broker signalling is needed is the ETSI EP TIPHON model in
which end-to-end service quality allocation is performed on the
service level [TIPHON-3]. In this case...
Tài liệu Thực hiện chất lượng dịch vụ trong các mạng IP (P9) pptx
... quality support
User IP layer
Application
Radio tunneling
RAB
Link
Radio tunneling
RAB
Link
GTP
IP
Link
GTP
IP
Link
GTP
IP
Link
GTP
IP
Link
Link
User IP layer User IP layer
Terminal IP base transceiver
station ... motivation for using
IP- based transport in cellular radio access network. Next, IP RAN
transport architecture is explained. After that, an implementation
of serv...
Thực hiện chất lượng dịch vụ trong các mạng IP (P1)
... Internet Protocol (IP) emerged from the period of
rapid technological development during the late 1990s as the win-
ning candidate. Converged IP- based delivery of content service
allows IP to be used ... network, allowing for cost-efficient
design of networking equipment. IP is a good convergence layer in
the sense that it can be run over multiple link layer technologies,
including ATM....
Thực hiện chất lượng dịch vụ trong các mạng IP (P2)
... a VoIP call with application sharing, for example, the following
distinct service event types can be enumerated:
• connection set-up signalling (e.g., H.323 or SIP);
• transmission of VoIP media ... Draft IP QoS classes International Telecommunication Union
QoS Class Applications
0 Real-time, jitter-sensitive, high interaction (VoIP, VTC)
1 Real-time, jitter-sensitive, interactive (VoIP,...
Thực hiện chất lượng dịch vụ trong các mạng IP (P3)
... domains
can be joined into a logical IPv6 backbone by tunnelling traffic
between IPv6 domains through IPv4 networks. The tunnelling
approach allows one to use non-modified IP routing protocols,
but requires ... Point (DSCP) into
a six-bit field in IP packet header called the DS field. DS field is
present in both IPv4 and in IPv6 headers, superseding the pre-
viously reserved IP header field o...
Thực hiện chất lượng dịch vụ trong các mạng IP (P4)
... subject to standardization in IETF’s IP Per-
formance Metrics working group (IPPM WG), ITU-T [I380], and
ETSI [TIPHON-5]. To give an example of IETF work, the IPPM
working group has defined measurement ... subject to
standardization at least in IETF [RFC1757, RFC2021, RFC3432] and
ETSI’s IP telephony project TIPHON [TIPHON-5].
Passive measurements do not add further traffic into the net-
wo...
Thực hiện chất lượng dịch vụ trong các mạng IP (P5)
... the IP telephony
project TIPHON, which has devised a reference models for IP
telephony, in which service providers can be separated from trans-
port operators [TIPHON-3]. The model pertains to IP ... multi-service IP network. ETSI
EP TIPHON, Internet2/QBone, and ETSI 3GPP service quality
support models were reviewed, as well as the concept of utility-
based allocation of resources.
TI...
Thực hiện chất lượng dịch vụ trong các mạng IP (P6)
... briefly. For concreteness, IP telephony
spanning multiple transport domains is used as an example.
SLA-based interworking means that the transport operators have
mutual SLAs for IP transport support ... cause unpleasant surprises with
respect to audio quality on normal PC hardware. The
ETSI EP TIPHON VoIP terminal classification, taking into
account the effects of terminal hardware, is one...
Thực hiện chất lượng dịch vụ trong các mạng IP (P7)
... packets.
Defined by IPPM working
group.
Periodic streams Defined by IPPM working
group.
ICMP ping Results may differ from
application
performance.
Service emulation HTTP query
Emulation of VoIP media
stream
226 ... function
efDV 5minutes milliseconds of IPDV at the 50
th
percentile
5minutes
5minutes milliseconds of IPDV at the 90
th
percentile
5minutes
5minutes milliseconds of IPDV at the 99.5...
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