cn8236 Mindspeed Technologies, cn8236 Datasheet - Page 36
cn8236
Manufacturer Part Number
cn8236
Description
Atm Servicesar Plus With Xbr Traffic Management
Manufacturer
Mindspeed Technologies
Datasheet
1.CN8236.pdf
(443 pages)
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2.0 Architecture Overview
2.2 High Performance Host Architecture with Buffer Isolation
2.2.1 Multiple ATM Clients
2-2
2.2 High Performance Host Architecture with
Buffer Isolation
Once initialized and given a segmentation or reassembly task, the CN8236
operates autonomously. Because the CN8236 is a high performance subsystem,
the host/ServiceSAR architecture and the algorithms for task submission and
status reporting have been optimized to minimize the control burden on the host
system.
The CN8236, functioning as an ATM UNI, provides a high throughput uplink to a
broadband network. Most individual ATM service users (or clients) do not have
the bandwidth requirements to equal the throughput capability of the CN8236. As
an application example, ATM clients can be Ethernet or Frame Relay ports.
Therefore, many service clients are typically aggregated onto one ATM UNI.
These clients can have very different needs and/or isolation requirements.
per-VCC Quality of Service (QoS) needs, the CN8236 functions as an ATM
server for up to 32 clients. In this way, the bandwidth requirements of the service
user (the client) can be balanced with the service throughput capability of the
CN8236 and the rest of the specific system.
paths. Each communication path, or flow, consists of a control queue and a status
queue for both segmentation and reassembly. The host assigns each of these
independent flows to system clients, or peers. These can be either PHY or logical
entities. As throughput requirements escalate, the host system can add processing
power in the form of additional peers. This degree of freedom creates a scalable
host environment. Multiple VCCs can be assigned to each client.
architecture, the CN8236 supplies the synchronization between asynchronous
tasks requiring ATM services.
shows that clients can be multiple applications in a shared memory, or separate
PHY entities. All communicate directly with the CN8236.
In order to fully capitalize on the high bandwidth of this service while meeting
The CN8236 provides multiple independent control and status communication
Each client interfaces to the CN8236 independently. Due to its server
Mindspeed Technologies
Figure 2-1
ATM ServiceSAR Plus with xBR Traffic Management
™
illustrates this client/server model. It
28236-DSH-001-B
CN8236
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