XIB-E Digi International/Maxstream, XIB-E Datasheet - Page 43

• Manufacturer Part Number: XIB-E
• Description: BOARD INTERFACE ETHERNET
• Manufacturer: Digi International/Maxstream

Specifications of XIB-E

• Accessory Type: Interface Board
• For Use With/related Products: XStream and Xcite Radios
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

XStream™ OEM RF Module – Product Manual v5.x00 [2006.02.24]
4.3.2. Multi-Streaming Mode
Th
Characteristics:
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 4‐05. Sample Network Profile
Module
Base
Remotes
* When Multi‐Streaming is enabled, the following parameters are consequently modified (if they have not
already been modified from their default states): RR,
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
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
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.
© 2006 MaxStream, Inc. Confidential and Proprietary
eory of Operation
igure 4‐07. Sample Connection Sequence Diagram
ction is a bi-directional connection that can only be established when in Multi-
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)
Parameter Settings (assume default values for parameters not listed)
ATMD 1
ATMD 2
[configure module as Multi-Stream Base] *
[configure module as Multi-Stream Remote] *
RN, MY, CD, AT and BT. [refer to Table 4‐06]
CRP = Connection Request Packet
CGP = Connection Grant Packet
DRP = Disconnect Request Packet (not
shown in diagram – applicable when
remote connection is disconnected using
the pin sleep I/O line.
DGP = Disconnect Grant Packet
ACK = Acknowledgement of reception.
Base module = The central
transmitting/receiving module in a network
of modules that maintains communications
with remote modules.
Remote module = A module in a network
that sends data to and receives data from a
base module.
Payload = Data contained inside the RF
Data of the RF Packet that originates from a
host to be transmitted over‐the‐air.
t
g the
43