[6tisch] cell rules in MSF

Tengfei Chang <tengfei.chang@gmail.com> Fri, 23 August 2019 12:11 UTC

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From: Tengfei Chang <tengfei.chang@gmail.com>
Date: Fri, 23 Aug 2019 14:11:02 +0200
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To: 6tisch <6tisch@ietf.org>
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Subject: [6tisch] cell rules in MSF
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Hi all,

As we discussed in IETF 105, we may need some way to monitor the candidate
cells to schedule before adding them.

Hence the following paragraph is added in version 06:

 As a consequence of randomly cell selection, there is a non-zero
   chance that nodes in the vicinity installed cells with same
   slotOffset and channelOffset.  An implementer MAY implement a
   strategy to monitor the candidate cells before adding them in
   CellList to avoid collision.  For example, a node MAY maintain a
   candidate cell pool for the CellList.  The candidate cells in the
   pool are pre-configured as Rx cells to listen whether there is any
   incoming frame on those cells.  If any IEEE802.15.4 frames are
   received within a pre-defined duration on one cell, that cell will be
   moved out from the pool and a new cell is selected as a candidate

   cell.  The cells in CellList are picked from the candidate pool

   directly when required.

Please let me know if you have any comments on this fix. Thanks!

Tengfei

-- 
Chang Tengfei,
Postdoctoral Research Engineer, Inria

[6tisch] cell rules in MSF Tengfei Chang
Re: [6tisch] cell rules in MSF Pascal Thubert (pthubert)