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(yè)數(shù)： 28/61頁(yè)
文件大小： 551K
代理商： PXB 4330 E
PXB 4330 E
ABM Buffer Configuration
Semiconductor Group
28
Application Note 11.98
1.7
Pseudocode of the Cell Acceptance Algorithm
The following thresholds, variables and flags are used for the pseudocode:
Counters (represented by variables on the left side)
TotalBufferOcc_rt/nrt
/* denoting the current total buffer occupancy by all rt and nrt cells of all given traffic
classes */
TotalBufferOcc_nrt
(=UNRTOC/DNRTOC)
/* denoting the current total buffer occupancy by all nrt cells of all given traffic classes */
TrafficClassOcc
(= TrafClassOcc(15:0))
/* denoting the current total buffer occupancy by all cells of an individual traffic class */
SchedulerOcc
(= SchedOcc(15:0))
/* denoting the current total buffer occupancy by all cells in all the queues of an individual
scheduler */
QueueOcc
(= QueueLength(15:0))
/* denoting the currently total buffer occupancy by all cells in an individual queue */
(= UBOC/DBOC)
Discard Thresholds
UBMTH/DBMTH (= total buffer threshold)
UEC/DEC
(= EPD CLP1 threshold for GFR, "low water mark")
BufNrtMax
BufNrtEPD
SbMaxEpdCi (case a) and b) in [
1
], page 52)
TrafClassMax
QmaxEPD
QCICLP1 (case b) and c) in [
1
], page 49)
QueueLengthMax (= maximum 16k cells per queue due to HW limitation)
/* discard thresholds of the ABM, see [
1
] */
Flags
Accept_flag (= 1 means to buffer incoming cell)
LCItable-PPDdiscardRestofPacket-flag_0
k
(= 1 means discard rest of packet = PPD
function)
LCItable-EPDdiscardPacket-flag_1
k
(= 1 means discard packet = EPD function)
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