Both the types of traffic patterns

Both the types of traffic patterns imposed on ATM networks and the transmission
characteristics of those networks differ markedly from those of other switching net
works. Most packet-switching and frame relay networks carry non-real-time data
traffic. Typically, the traffic on individual virtual circuits or frame relay connections
is bursty in nature, and the receiving system expects to receive incoming traffic on
each connection in a bursty fashion. As a result,
• The network does not need to replicate the exact timing pattern of incoming
traffic at the re exit node.
• Therefore, simple statistical multiplexing can be used to accommodate multi
ple logical connections over the physical interface between user and network.
The average data rate required by each connection is less than the burst rate
for that connection, and the user-network interface (UNI) need only be
designed for a capacity somewhat greater than the sum of the average data
rates for all connections.
A number of tools are available for control of congestion in packet-switched
and frame relay networks, some of which are discussed elsewhere in this chapter.
These types of congestion control schemes are inadequate for ATM networks.
[GERS91] cites the following reasons:
• The majority of traffic is not amenable to flow control. For example, voice and
video traffic sources cannot stop generating cells even when the network is
congested.
• Feedback is slow due to the drastically reduced cell transmission time com
pared to propagation delays across the network.

Kết quả (Anh) 1:

Both the types of traffic patterns imposed on ATM networks and the transmissioncharacteristics of those networks differ markedly from those of other switching networks. Most packet-switching and frame relay networks carry non-real-time datatraffic. Typically, the traffic on individual virtual circuits or frame relay connectionsis bursty in nature, and the receiving system expects to receive incoming traffic oneach connection in a bursty fashion. As a result,• The network does not need to replicate the exact timing pattern of incomingtraffic at the re exit node.• Therefore, simple statistical multiplexing Protocols transmitted can be used to accommodate multiPLE logical connections over the physical interface between user and network.The average data rate required by each connection is less than the burst ratefor that connection, and the user-network interface (UNI) need only bedesigned for a capacity somewhat greater than the sum of the average datarates for all connections.A number of tools are available for control of congestion in packet-switchedand frame relay networks, some of which are discussed elsewhere in this chapter.These types of congestion control schemes are inadequate for ATM networks.[GERS91] cites the following reasons:• The majority of traffic is not amenable to flow control. For example, voice andvideo traffic sources cannot stop generating cells even when the network iscongested.• Feedback is slow due to the drastically reduced cell transmission time compared to propagation delays across the network.

Kết quả (Anh) 2:

Both the types of traffic patterns imposed on ATM networks and the transmission
networks Characteristics of những differs markedly from những of other net switching
works. Most packet-switching and frame relay networks carry non-real-time data
traffic. Typically, the traffic on the individual virtual circuits or frame relay connections
is bursty in nature, and the system expects to receive Receiving incoming traffic on
each connection in a bursty fashion. As a result,
• The network không need to replicate the exact timing pattern of incoming
traffic at the re exit node.
• Therefore, simple statistical multiplexing to accommodate can be used multi
ple logical connections over the physical network interface and the between users.
The average data rate required by each connection is less coal the burst rate
for that connection, and the user-network interface (UNI) need only be
Designed for a capacity greater than the sum somewhat of the average data
rates for all connections.
A number of tools are available for the control of congestion in packet-switched
and frame relay networks, some of mà Discussed elsewhere in this chapter.
These types of congestion control schemes for ATM networks are Inadequate.
[GERS91] cites những REASONS:
• The Majority of traffic is not amenable to flow control. For example, voice and
video traffic sources can not stop tạo thậm cells khi network is
congested.
• Due to the slow Feedback is drastically reduced cell transmission time com
pared to all delays propagation across the network.