參數(shù)資料
型號(hào)： PXB 4330 E
廠商： SIEMENS AG
英文描述： ATM Buffer Manager(異步傳輸模式緩沖器管理器)
中文描述： 緩沖區(qū)管理器自動(dòng)柜員機(jī)（異步傳輸模式緩沖器管理器）
文件頁數(shù)： 18/61頁
文件大?。?/td> 551K
代理商： PXB 4330 E
PXB 4330 E
ABM Buffer Configuration
Semiconductor Group
18
Application Note 11.98
1.5
Existing Thresholds and Corresponding Counters
Figure 4
Assignment of Queues to Schedulers and Traffic Classes
The ABM has absolute thresholds for the global buffer and relative thresholds for the
individual scheduler, for each traffic class and each queue of a traffic class.
If the buffer partitioning approach suggested in
Section 1.8
, page 36 is used then the
relative thresholds apply:
A relative threshold of a traffic class defines a maximum possible number of storable
cells
as
long
as
the
global
buffer
BufNrtMax/BufNrtEPD) of this traffic class aren’t exceeded. That means a relative
threshold doesn’t represent a guaranteed number of storable cells per scheduler, traffic
class or queue. The reservation of guaranteed buffer space is made for rt-traffic and the
highest prior nrt-traffic class (e.g. VBR.2) or highest priority nrt-traffic class combination
(e.g. VBR.2 + VBR.3) by means of the absolute thresholds BufNrtMax/BufNrtEPD (see
Example 1
and
2
in
Section 1.8
, page 36).
The following is an example of a queue threshold to clarify this point:
Value of QmaxEPD is 1000 and EPDen=’0’, i.e. that threshold is a queue maximum fill
threshold for 1000 cells. Assume that a queue has stored 100 cells, but the buffer
allocated for this traffic class is completely occupied (limited by the relative threshold
TrafClassMax of this traffic class). Then a new arriving cell is discarded (although
101 < 1000 !) due to the shared buffer overflow. The appropriate statistical counters
(see [
1
], page 47) are updated.
thresholds
(=
absolute
thresholds
Scheduler 1
d
e
m
u
x
W
F
Q
W
F
Q
Scheduler 48
Traffic
class 1
Traffic
class 2
Traffic
class 16
相關(guān)PDF資料
PDF描述
PXB4219E Interworking Element for 8 E1/T1 Lines
PXB4220E Interworking Element for 8 E1/T1 Lines
PXB4221E Interworking Element for 8 E1/T1 Lines
PXB4219 IWE8 Interworking Element for 8 E1/T1 Lines
PXB4221 IWE8 Interworking Element for 8 E1/T1 Lines
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PXB4330EV1.1 制造商:Infineon Technologies AG 功能描述:SP000007503_ABM 制造商:Rochester Electronics LLC 功能描述:- Bulk
PXB4330EV1.1-G 制造商:Infineon Technologies AG 功能描述:
PXB4330EV2.1 制造商:Rochester Electronics LLC 功能描述:- Bulk
PXB4340E 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:ICs for Communications
PXB4340EV1.1-G 制造商:Infineon Technologies AG 功能描述:
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購

我的聯(lián)系方式

*
*
*