AeroComm Corporation 44249AJ Manuale Utente

Pagina di 43
    
    
    
5
5
5
5////8/2007
8/2007
8/2007
8/2007    
    32
32
32
32    
    
5.2
5.2
5.2
5.2     SSSS
OFTWARE 
OFTWARE 
OFTWARE 
OFTWARE 
PPPP
ARAMETERS
ARAMETERS
ARAMETERS
ARAMETERS
    
Below is a description of all software parameters used to control the AC4424. 
5.2.1
5.2.1
5.2.1
5.2.1     RF Architecture (Server
RF Architecture (Server
RF Architecture (Server
RF Architecture (Server----Client/Peer
Client/Peer
Client/Peer
Client/Peer----to
to
to
to----Peer)
Peer)
Peer)
Peer)    
The Server controls the system timing by sending out regular beacons (transparent to the 
transceiver Host), which contain system timing information.  This timing information 
synchronizes the Client radios to the Server. 
Each network should consist of only one Server.  There should never be two Servers on the 
same RF Channel Number
RF Channel Number
RF Channel Number
RF Channel Number in the same coverage area, as the interference between the two 
Servers will severely hinder RF communications. 
In Server-Client architecture, the Server communicates with the Clients and the Clients only
only
only
only 
communicate with the Server.  Enabling Peer
Peer
Peer
Peer----to
to
to
to----Peer Mode
Peer Mode
Peer Mode
Peer Mode will allow all radios on the network 
to communicate with each other.  Note:  All transc
Note:  All transc
Note:  All transc
Note:  All transceivers on the same network must have the 
eivers on the same network must have the 
eivers on the same network must have the 
eivers on the same network must have the 
same setting for Peer
same setting for Peer
same setting for Peer
same setting for Peer----to
to
to
to----Peer and there must still be one, and only one, Server present in a 
Peer and there must still be one, and only one, Server present in a 
Peer and there must still be one, and only one, Server present in a 
Peer and there must still be one, and only one, Server present in a 
Peer
Peer
Peer
Peer----to
to
to
to----Peer network.
Peer network.
Peer network.
Peer network.    
5.2.2
5.2.2
5.2.2
5.2.2    RF Mode
RF Mode
RF Mode
RF Mode    
Acknowledge Mode
Acknowledge Mode
Acknowledge Mode
Acknowledge Mode    
In Addressed Acknowledge Mode, the RF packet is sent out to the receiver designated by the 
Destination Address
Destination Address
Destination Address
Destination Address.  Transmit Retries
Transmit Retries
Transmit Retries
Transmit Retries are used to increase the odds of successful delivery to 
the intended receiver.  Transparent to the OEM Host, the sending transceiver will send the RF 
packet to the intended receiver.  If the receiver receives the packet free of errors, it will tell 
the sender.  If the sender does not receive this acknowledge, it will assume the packet was 
never received and retry the packet.  This will go on until the packet is successfully received 
or the transmitter exhausts all of its retries.  The received packet will only be sent to the OEM 
Host if and when it is received free of errors.   
In Broadcast Acknowledge Mode, the RF packet is broadcast out to all eligible receivers on 
the network.  In order to increase the odds of successful delivery, Broadcast Attempts
Broadcast Attempts
Broadcast Attempts
Broadcast Attempts are 
used to increase the odds of successful delivery to the intended receiver(s).  Transparent to 
the OEM Host, the sending transceiver will send the RF packet to the intended receiver.  If the 
receiver detects a packet error, it will throw out the packet.  This will go on until the packet is 
successfully received or the transmitter exhausts all of its attempts.  Once the receiver 
successfully receives the packet it will send the packet to the OEM Host.  It will throw out any 
duplicates caused by further Broadcast Attempts.  The received packet will only be sent to 
the OEM Host if it is received free of errors.