ZAURA Datasheet, PDF (17/99 Pages) –

ZAURA RF Wireless Library
Programmer’s Reference Manual
5
ZAURA RF Wireless cells operating within radio range of one another
can cause interference. Therefore, overlapping cells must have different
NID values. If possible, overlapping cells should use different RF chan-
nels. ZAURA RF Wireless addresses are not globally unique and can be
reused in adjacent cells.
ZAURA RF Wireless Framing
This section describes the format of frames the ZAURA RF Wireless
nodes use to communicate. In this document a frame is used to describe
the collection of bits transmitted and received by the radio and a packet is
used to describe the portion of the frame that resides in host memory.
Data Transfer Methods
Each ZAURA RF Wireless Module accommodates two methods of data
transfer: reliable and unreliable. Each is described in this section.
Unreliable Data Transfer
The unreliable data transfer mechanism employed by the ZAURA RF
Wireless Library allows for either broadcast (point-to-multipoint) or uni-
cast (point-to-point) communication. After an unreliable data frame has
been successfully transmitted, the sender does not receive any indication
that the frame was received by the intended recipient(s). This type of data
transfer is supported by all frame formats.
Reliable Data Transfer
Reliable data transfer is only possible when all nodes within the ZAURA
RF Wireless cell are configured to use the DA_SA_CTRL frame format.
In addition, reliable data transfer is only supported for point-to-point
communication; i.e., if a broadcast frame is transmitted using the
DA_SA_CTRL frame format, the data transfer will be unreliable.
RM006003-1011
ZAURA RF Wireless Framing