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| 型號： | COMMPROCWP |
| 英文描述： | Communications Processors: A Definition and Comparison |
| 中文描述： | 通訊處理器：定義和比較 |
| 文件頁數(shù)： | 2/8頁 |
| 文件大?。?/td> | 413K |
| 代理商： | COMMPROCWP |
2
ranging from sub-T1 through OC-48 in the WAN space in
addition to 10/100 and Gigabit Ethernet in the LAN space, is
increasing rather than decreasing.
As a result, networking products require the same
programmability and flexibility that was available in the
early CPU-based architectures in order to quickly adapt to
emerging standards, while maintaining the performance
gains achieved through ASICs. To accomplish this, a radically
new approach is required. See Figure 1.
Figure1
Network Processors Are the New Approach
Network Processors: Universal
Programmability and Performance
Network Processors, emerging on the market today, deliver
hardware-level performance to software programmable
systems. This powerful combination offers a revolutionary
approach to the design of communication systems. It allows
systems designers to focus on higher-level services and
ensures longer product lifecycles, rather than simply
meeting the “speeds and feeds” of the moment.
The power of
true
Network Processors is best examined in
light of the seven attributes that are listed in Table 1 and
described in the following sections. These attributes are
derived from next-generation network requirements for
programmability, performance, and openness.
Network
Processors
Performance
Functionality and Flexibility
Custom
Designed
ASICs
General Purpose CPUs
Merchant
"Switch-on-
a-Chip"
Complete Programmability
For real platform leverage, a Network Processor must be
universally applicable across a wide range of interfaces,
protocols, and product types. This requires programmability
at all levels of the protocol stack, from Layer 2 through Layer
7. Protocol support must include packets, cells, and data
streams (separately or in combination) across various
interfaces to meet the requirements of carrier edge devices,
for example, that are the cornerstone of the emerging
multiservice carrier network. See Figure 2.
Figure 2
Universal Switch-Router Line Cards Based on Network
Processor
This type of multiprotocol solution offers important
time-to-market competitive advantages, and dramatically
reduces support costs for both the network vendor and
service provider.
Table 1
Network Processor’s Seven Key Attributes
Attribute
Benefit
Complete programmability
Supports universal networking
applications
A simple programming model
Leads to faster time-to-market
Enables longer time-in-market
TM
Maximum system flexibility
Massive processing power
Provides scalable performance
High functional integration
Lowers total system costs
Open programming interfaces
Delivers higher availability
Third-party support
Encourages continuous innovation in
the industry
Switch
Fabric/
Optical
Network
Multiple
Protocols
(implemented
through
software)
Multiple
Line
Interfaces
Vast Range
of Solutions
Single
Line Card
Architecture
C-5
DCP
OC-48
OC-192
PHY
PHY
OC-12
OC-3
DS3
DS1
GbE
10/100
IP
ATM (& IMA)
MPLS
Multiple
Daughter
Interface Cards
Frame Relay
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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