XK-Z11-M Digi International, XK-Z11-M Datasheet - Page 34

• Manufacturer Part Number: XK-Z11-M
• Description: ZIGBEE MODULE DEVELOPMENT KIT
• Manufacturer: Digi International
• Series: XBee™r
• Type: Transceiver, 802.15.4/ZigBeer

Specifications of XK-Z11-M

• Frequency: 2.4GHz
• For Use With/related Products: XBee Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 602-1184

© 2010 Digi International, Inc.
3. XBee ZigBee Networks
Introduction to ZigBee
ZigBee Stack Layers
Networking Concepts
ZigBee is an open global standard built on the IEEE 802.15.4 MAC/PHY. ZigBee defines a network layer above the
802.15.4 layers to support advanced mesh routing capabilities. The ZigBee specification is developed by a growing
consortium of companies that make up the ZigBee Alliance. The Alliance is made up of over 300 members, including
semiconductor, module, stack, and software developers.
The ZigBee stack consists of several layers including the PHY, MAC, Network, Application Support Sublayer (APS),
and ZigBee Device Objects (ZDO) layers. Technically, an Application Framework (AF) layer also exists, but will be
grouped with the APS layer in remaining discussions. The ZigBee layers are shown in the figure below.
A description of each layer appears in the following table:
Device Types
ZigBee defines three different device types: coordinator, router, and end device.
Node Types / Sample of a Basic ZigBee Network Topology
A coordinator has the following characteristics: it
ZigBee Layer
PHY
MAC
Network
APS (AF)
ZDO
•Selects a channel and PAN ID (both 64-bit and 16-bit) to start the network
•Can allow routers and end devices to join the network
•Can assist in routing data
•Cannot sleep--should be mains powered
•Can buffer RF data packets for sleeping end device children.
Description
Defines the physical operation of the ZigBee device
including receive sensitivity, channel rejection, output
power, number of channels, chip modulation, and
transmission rate specifications. Most ZigBee
applications operate on the 2.4 GHz ISM band at a
250kbps data rate. See the IEEE 802.15.4
specification for details.
Manages RF data transactions between neighboring
devices (point to point). The MAC includes services
such as transmission retry and acknowledgment
management, and collision avoidance techniques
(CSMA-CA).
Adds routing capabilities that allows RF data packets
to traverse multiple devices (multiple "hops") to route
data from source to destination (peer to peer).
Application layer that defines various addressing
objects including profiles, clusters, and endpoints.
Application layer that provides device and service
discovery features and advanced network
management capabilities.
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