參數(shù)資料
型號： XIB-E
廠商： Digi International/Maxstream
文件頁數(shù)： 43/64頁
文件大?。?/td> 1858K
描述： BOARD INTERFACE ETHERNET
標(biāo)準(zhǔn)包裝： 1
附件類型： 接口板
適用于相關(guān)產(chǎn)品： XStream 和 Xcite 收音機(jī)
XStream"燨EM燫F燤odule?燩roduct燤anual爒5.x00燵2006.02.24]?/DIV>
4.3.2. Multi-Streaming Mode
Characteristics:   Enables exclusive connections [refer to Operation section for definition] 
Supports the passing of large data streams (> 256 bytes) from multiple
remote modules to a base module (If a complete data stream from a remote
module is less than 256 bytes, data can be sent from several remotes to a
base location without enabling this mode and latencies will be much less.)
Transmissions never acknowledged (ACK) by receiving module(s)
Required Parameter Values (TX Module): MD = 1 (Base), MD = 2 (Remote), RN > 0, RR > 0, 
MY ` 0xFFFF
Recommended Use: Use this mode in point-to-multipoint networks where remote modules 
initiate communications and require exclusive (uninterrupted) connections to the base module.
Table?05.   Sample燦etwork燩rofile?/DIV>
Module
Parameter Settings
 
 (assume default values for parameters not listed)
Base
ATMD 1
[configure module as Multi-Stream Base] *
Remotes
ATMD 2
[configure module as Multi-Stream Remote] *
 
RN,燤Y,燙D,燗T燼nd燘T.燵refer爐o燭able?06]?/DIV>
Th
*燱hen燤ultiStreaming爄s爀nabled,爐he爁ollowing爌arameters燼re燾onsequently爉odified?if爐hey爃ave爊ot?/DIV>
already燽een爉odified爁rom爐heir燿efault爏tates):燫R,?/DIV>
eory of Operation
When in Multi-Streaming Mode, all remote modules can initiate communications with the base
module at the same time, but only one remote is granted an exclusive connection. After an
exclusive connection begins, data is transferred exclusively between two modules withou
interruption from any other modules in the network.
An exclusive conne
t
ction is a bi-directional connection that can only be established when in Multi-
g the
igure?07. Sample燙onnection燬equence燚iagram?/DIV>
 
 
In the connection sequence above, an exclusive connection is first granted to Remote m. The
CGP (Connection Grant Packet) is broadcast to all remote modules in the network to
communicate the base in engaged in an exclusive connection. Upon receipt of the CGP
notification, remote modules will wait for a DGP (Disconnect Grant Packet) before attempting
again to send data to the base module.
Streaming Mode. An exclusive connection is immune to other remote modules interruptin
connection and interleaving data (The interleaved data potentially renders the base module
unable to discern from which remote module the data was transmitted).
When an exclusive connection is granted to a single remote, the other remotes are notified that
the connection exists. The notification causes the remote modules to postpone transmissions until
the base module sends notification that the exclusive connection has ended.
F
CRP?/SPAN>=?/SPAN>Connection?/SPAN>Request?/SPAN>Packet
CGP?/SPAN>=?/SPAN>Connection?/SPAN>Grant?/SPAN>Packet?/SPAN>
DRP?/SPAN>=?/SPAN>Disconnect?/SPAN>Request?/SPAN>Packet?/SPAN>(not?/SPAN>
shown爄n燿iagram?燼pplicable爓hen?/DIV>
remote燾onnection爄s燿isconnected爑sing?/DIV>
the爌in爏leep營/O爈ine.?/DIV>
DGP?/SPAN>=?/SPAN>Disconnect?/SPAN>Grant?/SPAN>Packet?/SPAN>
ACK?/SPAN>?/SPAN>=?/SPAN>Acknowledgement?/SPAN>of?/SPAN>reception.?/SPAN>
Base爉odule?/SPAN>=?/SPAN>The?/SPAN>central?/SPAN>
transmitting/receiving爉odule爄n燼爊etwork?/DIV>
of爉odules爐hat爉aintains燾ommunications?/DIV>
with爎emote爉odules.?/DIV>
Remote爉odule?SPAN class="pst XIB-E_2593259_3">=?/SPAN>A?/SPAN>module?/SPAN>?/SPAN>in?/SPAN>a?/SPAN>network?/SPAN>
that爏ends燿ata爐o燼nd爎eceives燿ata爁rom燼?/DIV>
base爉odule.牋
Payload?/SPAN>=?/SPAN>Data?/SPAN>contained?/SPAN>inside?/SPAN>the?/SPAN>RF?/SPAN>
Data爋f爐he燫F燩acket爐hat爋riginates爁rom燼?/DIV>
host爐o燽e爐ransmitted爋vertheair.?/DIV>
 
 
 
 
 
 
 
 
 
 
 
牋牘?006燤axStream,營nc.燙onfidential燼nd燩roprietary?/DIV>
43?/DIV>
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