CC2538-CC2592EMK: Router sending leave request to end device.

Dhanraj

Guru 14820 points

Part Number: CC2538-CC2592EMK
Other Parts Discussed in Thread: CC2592, Z-STACK

Hello ,

why router is sending leave request to end device??

Please find attached sniffer log.refer packet id -89-92

router sending leave to end device packet count 89-92.rar

over 8 years ago

0 Ryan Brown1 over 8 years ago

TI__Guru**** 223677 points

Hello Dhanraj,

What is the NWK_END_DEV_TIMEOUT_DEFAULT value? It's hard to diagnose the situation since the ZED is not involved in any prior packets. If the end device times out due to a lack of data request polls then a leave request would be sent. It also seems wrapped around a rejoin request by 0x16FB and 0x4827 orphanage due to lack of ZR response to a data request. 0x2738 seems to successfully rejoin a few seconds later at any rate. There are also several packets missing from the sniffer log.

Regards,
Ryan

0 Dhanraj over 8 years ago in reply to Ryan Brown1

Guru 14820 points

should I check this(NWK_END_DEV_TIMEOUT_DEFAULT ) in Router code or ZED code ??

0 Ryan Brown1 over 8 years ago in reply to Dhanraj

TI__Guru**** 223677 points

ZR code, END_DEV_TIMEOUT_VALUE (ZGlobals.h) and poll values (f8wConfig.cfg) of ZED.

Regards,
Ryan

0 Dhanraj over 8 years ago in reply to Ryan Brown1

Guru 14820 points

ZR , ZGlobals.h
NWK_END_DEV_TIMEOUT_DEFAULT 8
END_DEV_TIMEOUT_VALUE 8
NWK_END_DEVICE_LEAVE_TIMEOUT 9

ZED ,f8wConfig.cfg
-DPOLL_RATE=5000
-DQUEUED_POLL_RATE=100
-DRESPONSE_POLL_RATE=100
-DREJOIN_POLL_RATE=440
-DREJOIN_BACKOFF=900000
-DREJOIN_SCAN=900000

0 Ryan Brown1 over 8 years ago in reply to Dhanraj

TI__Guru**** 223677 points

Capture an event where the ZR sends a leave request within the last valid ZED data poll. Also make sure that the number of ZR children does not exceed its NWK_MAX_DEVICE_LIST.

Regards,
Ryan

0 Dhanraj over 8 years ago in reply to Ryan Brown1

Guru 14820 points

oK, I will capture the particular event.

So basically you are thinking that the ZED is not sending data request or router is not receiving data request from ZED , hence router is sending leave request?

0 YiKai Chen over 8 years ago in reply to Dhanraj

Guru 735695 points

Basically, if ZED is not sending data request to its parent node for a while, its parent node would age out the ZED and the parent node would send leave request to ask device to rejoin when the parent node receives any message from ZED. This is child aging behavior in Zigbee 3.0.

0 Dhanraj over 8 years ago in reply to YiKai Chen

Guru 14820 points

How can I change the child age out period in router ??

0 YiKai Chen over 8 years ago in reply to Dhanraj

Guru 735695 points

You can change NWK_END_DEV_TIMEOUT_DEFAULT to make it.

0 Dhanraj over 8 years ago in reply to YiKai Chen

Guru 14820 points

default value is -
#define NWK_END_DEV_TIMEOUT_DEFAULT 8 // Default value per ZigBee core specification is 8
> what is the unit of 8??

and i think the below parameter is also related to leave request or remove device ??
//Timeout after which an EndDevice will be removed from from the indirect MAC messages queue
// NOTE: End devices which poll rate is slower than this will not receive the leave request
#define NWK_END_DEVICE_LEAVE_TIMEOUT 9
> here also what is the unit of 9 ??

0 YiKai Chen over 8 years ago in reply to Dhanraj

Guru 735695 points

The followings are the mapped values.

// Child aging management default values
// Values are specified in table of nwk_globals.h module
//timeoutValue[15]
// 10, // 0 10 seconds
// 2, // 1 2 minutes
// 4, // 2 4 minutes
// 8, // 3 8 minutes
// 16, // 4 16 minutes
// 32, // 5 32 minutes
// 64, // 6 64 minutes
// 128, // 7 128 minutes
// 256, // 8 256 minutes
// 512, // 9 512 minutes
// 1024, // 10 1024 minutes
// 2048, // 11 2048 minutes
// 4096, // 12 4096 minutes
// 8192, // 13 8192 minutes
// 16384 // 14 16384 minutes

0 Dhanraj over 8 years ago in reply to YiKai Chen

Guru 14820 points

#define NWK_END_DEV_TIMEOUT_DEFAULT 8 // 8 means the actual timeout value is 256 minute

If any router does not receive any mac data request from a particular child ZED in 256 minute then it will send leave request to zed if zed send any message to its parent router, correct ???

#define NWK_END_DEVICE_LEAVE_TIMEOUT 9 // 9 means the actual timeout value is 512 minute

If any router does not receive any mac data request from a particular child ZED in 512 minute then, that zed will be removed from the message queue , correct ???

0 YiKai Chen over 8 years ago in reply to Dhanraj

Guru 735695 points

Yes, your understand is correct.

0 Dhanraj over 8 years ago in reply to YiKai Chen

Guru 14820 points

256 minute is significant time , My zed is programmed to send data request at 5 second , In 4 hours, in any circumstance my zed will send more then 1 data request to the parent , then why router sends leave request to zed? this behavior is strange ??

0 YiKai Chen over 8 years ago

Guru 735695 points

As Ryan replied, It's hard to diagnose the situation since the ZED is not involved in any prior packets. You have to do a complete sniffer log so we can judge what exactly happens.

0 Dhanraj over 8 years ago in reply to YiKai Chen

Guru 14820 points

If i setup my sniffer near zed , then we should be able to see zed packets also!!!

0 YiKai Chen over 8 years ago in reply to Dhanraj

Guru 735695 points

If I am correct, your ZED is not far away from ZC/ZR, right? If so, a sniffer placed in center of all your ZC/ZR/ZEDs should be able to sniff all of messages. Unless, there is something wrong with your RF performance of devices.

0 Dhanraj over 8 years ago in reply to YiKai Chen

Guru 14820 points

yes you are right, everything is in less then 10 meter radius area.
will setup sniffer in center.Hopefully we should be able to figure out this problem.

0 YiKai Chen over 8 years ago in reply to Dhanraj

Guru 735695 points

I think you should make sure your RF performance is correct first.

0 Dhanraj over 8 years ago in reply to Dhanraj

Guru 14820 points

/* Number of times retry to poll parent before indicating loss of synchronization
* with parent. Note that larger value will cause longer delay for the child to
* rejoin the network.
*/
-DMAX_POLL_FAILURE_RETRIES=2

I think this parameter is also related to ZED rejoin , This should be modified in ZED code or Router code to delay ZED rejoin ??

0 YiKai Chen over 8 years ago in reply to Dhanraj

Guru 735695 points

This is about ZED.

0 Dhanraj over 8 years ago in reply to YiKai Chen

Guru 14820 points

Ok i have captured sniffer log by keeping sniffer in center ,

In the log I have observed that ZED sends data request , (packet ID 1270)

After 2 minute router is sending remove device command to that ZED (packet ID 1771)

PFA sniffer log!!

data request at 1270 and remove device at 1771.rar

0 Dhanraj over 8 years ago in reply to Dhanraj

Guru 14820 points

573b sending data request but still router sending leave request to It at packet 3061.rarI have captured One more event where I can see data request from ZED (573B ) But still router sending it leave request at packet id 3061

0 YiKai Chen over 8 years ago in reply to Dhanraj

Guru 735695 points

There are lots of data requests having no mac ack. I suspect there might be WiFi or 2.4G interference on channel 26. I suggest you to move to another channel to test again.

0 Dhanraj over 8 years ago in reply to YiKai Chen

Guru 14820 points

as Ryan Mentioned in my other post zigbee channel 15,20,25,26 are always free from wifi interference , here

Also You can see the current wifi channels traffic available in my test setup environment in attached screenshot below -

0 YiKai Chen over 8 years ago in reply to Dhanraj

Guru 735695 points

That is general case but I don’t know if channel 26 is clear from WiFi interference in your environment. I can only suggest you to change channel to test again.

0 Dhanraj over 8 years ago in reply to YiKai Chen

Guru 14820 points

I have edited previous reply and attached wifi channel traffic, there is no wifi traffic on channel 26 ,
also you can see at below link, wifi channel 14 is not available in most of the countries , Its only available in japan with 802.11b version.
en.wikipedia.org/.../List_of_WLAN_channels

correct me if information is not correct.

0 YiKai Chen over 8 years ago in reply to Dhanraj

Guru 735695 points

Maybe the RF performance on channel 26 is not good. Why don’t you try other channels?

0 Dhanraj over 8 years ago in reply to YiKai Chen

Guru 14820 points

1) "Maybe the RF performance on channel 26 is not good."
Any further explanation , why ??

Earlier I have tried other channels also.
as You can see the wifi traffic in the setup environment in the attached pictures in my previous reply,
I can't choose any other zigbee channel , there is to much wifi traffic.

0 YiKai Chen over 8 years ago in reply to Dhanraj

Guru 735695 points

Channel 26 is last channel and on the boundary of Zigbee 802.15.4 modulation so it might not have good RF performance as other channel.

0 Dhanraj over 8 years ago in reply to YiKai Chen

Guru 14820 points

Kindly provide any reference document which mention reduced RF performance for zigbee channel 26.
also expecting comments from TI experts .

0 Ryan Brown1 over 8 years ago in reply to Dhanraj

TI__Guru**** 223677 points

You've already provided a link to my comments on the matter. Any other information I can provide regarding channel 26 can be found by searching online.

community.smartthings.com/.../40159
acuitysupport.zendesk.com/.../225413967-Zigbee-Networking-Basics-35-000ft-view-

Have you evaluated channels 15 or 20?

Regards,
Ryan

0 Dhanraj over 8 years ago in reply to Ryan Brown1

Guru 14820 points

Thanks for the links for dealing with wifi interference.

But My doubt is why ZigBee channel 26 will have will have bad RF performance with comparison to other, as mentioned by YIKAI CHEN in the previous reply - "ZigBee channel 26 might have bad RF performance due to some modulation problem".

Regarding this, I had asked for some reference documents.

yes,I have tried channel 20,15,11 earlier and That was very bad experience but there was mistakes as well like cc2592 incorrect configuration in z-stack.

Zigbee & Thread

Zigbee & Thread forum

CC2538-CC2592EMK: Router sending leave request to end device.