If the operational channel of the
sink device is not known to the device, GPD gets the same by performing the channel
configuration procedure. To get the operational channel, GPD sends the channel
request to the sink device (see packets #134 and
#137), and it responds with the operational channel to GPD by
channel configuration command. The following figure illustrates packets
#134, #137 and #138.
At first, the GPD does not know about
the operational channel and sends the channel requests in multiple channels, which
are enabled in channel mask.
GPD indicates its availability for
reception in Frame Control Field (FCF) of the Channel Request
command. If the Auto Commissioning of the FCF field is set to
‘0’, RxAfterTx is enabled and vice versa.
After sending a channel request from
the same device with Auto Commissioning = 0, the GPD receives the
channel configuration.
Send packet #134
channel request packet with Auto Commissioning = 1 and
RxAfterTx is disabled, hence the GPD does not receive the
channel configuration. Whereas, for the channel request packet
#137, the Auto Commissioning = 0 and
RxAfterTx is enabled, the GPD receives the channel
configuration (see packet #138).
GPD after receiving this command
changes its operational channel to the sink device’s operational channel.
When the operational channel of the
sink device is not same as GPD’s RX channels, the sink device changes its channel
for a short duration (5s) to deliver the channel configuration packet in GPD’s RX
channel. When the operational channel and RX channels are the same, the sink device
need not change its channel. After receiving the channel configuration, the GPD need
not send any more channel requests and can continue with commissioning. For more
details, refer to the Zigbee PRO Green Power feature specification Basic
functionality set (Version 1.1.1).
The online versions of the documents are provided as a courtesy. Verify all content and data in the device’s PDF documentation found on the device product page.
