D-Link Forums
COVR - D-Link Whole Home Systems => COVR-C1203-US => Topic started by: choisadal on May 17, 2020, 09:34:13 PM
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1. STA info.
- Device type: IoT Device using Power Save Mode
- Beacon check interval: 1.8sec
- using 'PS-Poll' frame method (802.11 standard): When the station receives a Beacon with its AID in the TIM element, the STA initiates the frame delivery by transmitting a PS-Poll control frame to the AP.
2. Root cause
- AP should send the Data frame after checking on STA wake-up from PS Poll frame. But, D Link COVR C1203 AP sends the Data frame before Beacon frame.
- Eventually, the STA does not receive the data sent before the Beacon frame.
3. Detailed description based on capture file between D-Link COVR C1203 and STA.
- Very often COVR C1203 sends Data frame(UC:Ping Request) to STA before sending Beacon frame.
- After sending Data, COVR C1203 notifies to STA having AID that there is buffered Data.
- STA response PS Poll “I’m ready to get the data” when the COVR C1203 indicates it has buffered frame addressed to the STA.
- Although COVR C1203 receives the PS Poll, COVR C1203 did not send the Data frame to STA. Because COVR C1203 already sent Data frame(at first step) before sendind Beacon frame.
- For that reason, COVR C1203 thinks STA is disassociated after trying to send data frame several times.
- So, upon receiving the data frame from STA, COVR C1203 sends Deauth frame to STA due to Reason code: Class 2 frame received from non-authenticated STA.(0x0006)
4. Standard procedure for receiving data from AP by device using Power Save mode.
- When the AP has the data to send to the STA.
- First, a Beacon(with AID) must be sent to notify to the STA that there is buffered data.
- The STA that receives the Beacon(with AID) from AP, transmits the PS-Poll frame to AP.
- The AP that receives the PS-poll frame learns that the STA is ready to receive.
- So, AP transmits the buffered data to the STA immediately.(802.11 standard)
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Link>Welcome! (http://forums.dlink.com/index.php?topic=49573.0)
- What Hardware version is your router? Look at sticker under the router case.
- Link>What Firmware (http://forums.dlink.com/index.php?topic=47512.0) version is currently loaded? Found on the routers web page under status.
- What region are you located?
What is the Mfr and model# of the IoT device?
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Sorry I'm late
Thank you for your concern.
Please refer to the answer below.
What Hardware version is your router? Look at sticker under the router case.
-> HW Ver. : A1
Link>What Firmware version is currently loaded? Found on the routers web page under status.
-> initial F/W version 1.04, I tested latest F/W version 1.08
What region are you located?
-> Korea
What is the Mfr and model# of the IoT device?
-> My Device is Digital Door Lock with Wi-Fi solution.
What is the Mfr and model# of the IoT device?
-> Samsung SDS, It is a product under development.
-> For verification, I took the same test with Samsung smartphone Galaxy Note 10.
The problem that came out of my product occurred in the same way.
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I recommend that you phone contact your regional D-Link support office and ask for help and information regarding this.
Link> Tech Support Contact Information (http://forums.dlink.com/index.php?board=635.0)
We find that phone contact has better immediate results over using email.
Let us know how it goes please.
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Thank you
I'm in a very difficult situation right now.
D-link covr 1203 is unfortunately not released in Korea.
So I bought it in Amazon mall.
The problem arose here.
In Korea, it is not possible to provide technical support because the product is not officially released in Korea.
So, when I asked the US for technical support, it is possible to provide technical support only for off-line sales products used in the United States.
Now, I do not know where and how to request technical support for the problem of D-link covr 1203.
In addition, it is impossible to understand how global companies respond to customers of D-Link.
Please help me how to get technical support.
Thank you.
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Ya, support is a regional thing. Korea has there own support and some regions don't support some model routers as in other regions, i.e. USA. There is no cross regional support.
I recommend that you return the 1203 to Amazon and find something that is fully supporting in your regional D-Link office.