參數(shù)資料
型號： PM5372-BI
英文描述： Telecommunication IC
中文描述： 通信集成電路
文件頁數(shù)： 19/169頁
文件大小： 989K
代理商： PM5372-BI
TSE Transmission Switch Element Datasheet
Released
TSE Fabric Scaling
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-1991258, Issue 7
19
4.2
Independent of the application described above, the TSE is a general STS-1/AU-3 granularity
fabric. As a fabric, it supports multiple architectures which scale in aggregate bandwidth from 40
Gb/s to 2.5 Tb/s (and larger, until limited by packaging concerns). Fabrics up to 160 Gb/s (i.e. 4
TSE devices) are supported in a single stage architecture. All fabrics are rearrangably non-
blocking under all 100% loaded permutations of unicast traffic. Scaling of these TSE
architectures is accomplished by two mechanisms: division of the fabric into multiple
planes
, and
deepening of the fabric into multiple
stages
, where each stage may be of some power-of-two
height
, up to a maximum depending on the number of
stages
. A plane of TSEs within a fabric is
defined as a group of connected TSEs unconnected to other TSE groups in the fabric. A multiple
plane fabric requires distributing the connections of each serializer’s I/O to all planes. The
PM5310 TBS device with its four serial streams, can be used to implement a one, two, or four
plane fabric.
Figure 2 illustrates the simplest TSE fabric. One TSE is connected to 16 full-duplex STS-48
loads via 16 TBS devices, providing an aggregate switch bandwidth of 40 Gb/s using one TSE
and 16 TBS devices. The TBS devices in Figure 2 are used only to serialize Parallel
TelecomBuses (P-TCB). Where OC-48 load devices have Serial TelecomBuses (S-TCB)
interfaces, the TBS devices are unnecessary. Each STS-48 load is connected by four full-duplex
links. The links from the Loads to the TBS devices are Parallel TelecomBuses (P-TCB), which
are 4 * 8 bits at 77.76 MHz; all links to/from TSE devices are Serial TelecomBuses (S-TCB),
which are 4 * 777.6 MHz LVDS links. In each
depth
one TSE fabric, the TSE devices form non-
blocking Time-Space-Time fabrics.
Figure 2 Fabric with One Plane of Depth One.
TBS (0)
TSE
TBS
(15)
.
4
4
4
4
STS-48 (0)
STS-48
(15)
(STS-48 Sources = 16; Aggregate Bandwidth = 40 Gb/s; TSE Chip Count = 1; TBS Chip Count =
16)
Figure 3 illustrates a two-plane TSE fabric. Each of 32 full-duplex STS-48 loads on 32 TBS
devices are connected by two LVDS links each to each of two TSE devices. The aggregate
switch bandwidth is 80 Gb/s at a cost of two TSE devices and 32 TBS devices.
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