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Re: [STDS-802-11-TGBE] [Suspected Marketing Mail] [STDS-802-11-TGBE] [CR-MAC] Feedback Requested for CRs on Basic variant ML element (Clause 9)

Hello Rajat,

 

Link ID maps to only one tuple at a time. Before the channel switch occurs, Link ID 0 will map to the initial tuple, while it will map to the new tuple immediately after the channel switch occurs.

 

This is also reflected in the contents of the RNR element before and after the channel switch. Pls see page 206, lines 6-21 of D0.4:

 

When a first AP affiliated with an MLD is switching from an initial operating class/channel to a target operating class/channel at a target switch time using channel switch announcement procedure or extended channel switch announcement procedure, then:

  • another AP affiliated with the AP MLD shall set the fields corresponding to the first AP that is reported in the Reduced Neighbor Report element in Beacon and Probe Response frames it transmits (or that the transmitted BSSID in the same multiple BSSID set as the other AP transmits if the other AP corresponds to a nontransmitted BSSID) before the target switch time to the initial operating class/channel,
  • another AP affiliated with the AP MLD shall set the fields corresponding to the first AP that is reported in the Reduced Neighbor Report element in Beacon and Probe Response frames it transmits (or that the transmitted BSSID in the same multiple BSSID set as the other AP transmits if the other AP corresponds to a nontransmitted BSSID) after the target switch time to the target operating class/channel.

 

Thanks,

Gaurang

From: Rajat PUSHKARNA <rajat.pushkarna@xxxxxxxxxxxxxxxx>
Sent: Wednesday, April 7, 2021 9:03 PM
To: Gaurang Naik <gnaik@xxxxxxxxxxxxxxxx>; STDS-802-11-TGBE@xxxxxxxxxxxxxxxxx
Subject: [EXT] RE: [STDS-802-11-TGBE] [Suspected Marketing Mail] [STDS-802-11-TGBE] [CR-MAC] Feedback Requested for CRs on Basic variant ML element (Clause 9)

 

Hi Gaurang,

 

Thanks for the example.

 

I have a clarification question. Does this mean that the same Link ID is mapped to two different tuples?

 

Best Regards,

Rajat

From: Gaurang Naik <gnaik@xxxxxxxxxxxxxxxx>
Sent: Thursday, 8 April 2021 11:55 am
To: STDS-802-11-TGBE@xxxxxxxxxxxxxxxxx
Subject: Re: [STDS-802-11-TGBE] [Suspected Marketing Mail] [STDS-802-11-TGBE] [CR-MAC] Feedback Requested for CRs on Basic variant ML element (Clause 9)

 

Hello Jay,

 

Thank you very much for reviewing the CR document.

 

Regarding your question, if there a channel switch on a link, the Link ID *will not* change. Pls refer to the text below from 35.3.4.4 of D0.4 (page 197, line 8):

An AP of an AP MLD shall have a unique link ID that shall not change during the lifetime of the AP MLD.

 

Let us assume that an AP MLD has three links. The mapping will be something link this:

Link ID                  Tuple

0                              <Cl_1, Ch_1, BSSID_1>

1                              <Cl_2, Ch_2, BSSID_2>

2                              <Cl_3, Ch_3, BSSID_3>  

 

Now, let us say the channel on link 0 changes from <Cl_1, Ch_1> to <Cl_4, Ch_4>, the new mapping will be:

Link ID                  Tuple

0                              <Cl_4, Ch_4, BSSID_1>

1                              <Cl_2, Ch_2, BSSID_2>

2                              <Cl_3, Ch_3, BSSID_3>

 

So, the Link ID will not change. Only the tuple value will change. Link ID 0 will now map to the tuple <Cl_4, Ch_4, BSSID_1>.

 

The relationship between the Link ID and the <class, channel, BSSID> tuple was specified in Motion 124, SP 186. Pls see the text below. The note simply captures the motion.

Please let me know if that answers your question.

 

Thanks,

Gaurang

 

From: Yang, Zhijie (NSB - CN/Shanghai) <zhijie.yang@xxxxxxxxxxxxxxx>
Sent: Wednesday, April 7, 2021 8:09 PM
To: Gaurang Naik <gnaik@xxxxxxxxxxxxxxxx>; STDS-802-11-TGBE@xxxxxxxxxxxxxxxxx
Subject: [EXT] RE: [Suspected Marketing Mail] [STDS-802-11-TGBE] [CR-MAC] Feedback Requested for CRs on Basic variant ML element (Clause 9)

 

Hi Gaurang,

 

Thanks for the PDT.

 

For following sentence, as you mentioned, The Link ID is unique value to identify every AP within the AP MLD. But if the AP switches the working channel, it means the Operating class and channel are also changed accordingly. Seems it’s not correct to tie the Link ID to the tuple<class, channel, BSSID>. Or do you mean the Link ID also can be changed?

 

 

[CID 3127]NOTE – The Link ID of an AP affiliated with an AP MLD is a representation of the tuple consisting of Operating Class, Operating Channel, and BSSID of the AP affiliated with the AP MLD. The Link ID is unique to every AP affiliated with an AP MLD.

 

Thanks

 

Best Regards

 

Jay Yang

 

From: Gaurang Naik <gnaik@xxxxxxxxxxxxxxxx>
Sent: 2021年3月27日 0:53
To: STDS-802-11-TGBE@xxxxxxxxxxxxxxxxx
Subject: [Suspected Marketing Mail] [STDS-802-11-TGBE] [CR-MAC] Feedback Requested for CRs on Basic variant ML element (Clause 9)

 

Hello all,

 

I have prepared the CR document 11-21/0506r0 that addresses the following CIDs:

2159, 2161, 3018, 1908, 3019, 2587, 1906, 1907, 1776, 3127, 2436

 

The comments are related to the Basic variant Multi-Link element text in Clause 9.

 

Could you kindly take a look and provide your feedback? Any feedback is appreciated.

 

Thanks,

Gaurang

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