Hi Xavi, Thank you for your response.
I think the cells are equivalent if they belong to the same bundle. For example, the cells (1,2) and (2,2) are used together to transmit a relatively large packet. In this case, the two cells should be considered as a whole: if (1,2) cannot be relocated then (2,2) won't be able too; otherwise, if (1,2) can be relocated and (2,2) can't, it might be inappropriate to relocate (1,2) only, because it could cause packet loss. If (1,2) and (2,2) are of different purpose (to transmit different packets) or of different type (RX and TX), they can be considered independently: the relocation of (2,2) should be considered even if the relocation of (1,2) fails. Indeed, the policy is implementation-specific, but it might be better for 6top to support more possibilities. For example, a cell (NaN, NaN) could be used to represent a relocation failure. Best regards, Remy From: Xavi Vilajosana Guillen [mailto:[email protected]] Sent: Friday, September 01, 2017 5:18 PM To: Liubing (Remy) Cc: [email protected] Subject: Re: [6tisch] Question about the Relocation in 6P Hi Remy, I think this can be an implementation decision. IMHO, when a node requests a relocation like the one in Figure 15, it assumes that any of the candidate cells is equivalent. This means that if [1,2] cannot be relocated then [2,2] won't be able too. Seen in another way, the relocation may happen in the list order consuming all possible candidate cells. This can be seen as a policy that may depend on the implementation or SF rules so other options may also be possible but are out of the scope of 6P.. Do you have a specific example where the case you present is relevant? regards, Xavi 2017-08-30 8:29 GMT+02:00 Liubing (Remy) <[email protected]>: Hello folks, I have a question about the relocation of cells in the draft 6tisch-6top-protocol. In section 4.3.3, node A wants to relocate several cells and selects candidate cells from its schedule for node B, then node B's SF verifies which of the cells it can install in its schedule. The verification can be partially succeed. If N < NumCells cells appear in the CellList, this means first N cells in the Relocation CellList have been relocated, the remainder have not. Does this mean that if the relocation of the first cells fails, there would not be necessary to verify if the rest cells could be relocated? For example, in Figure 15, if the cell (1,2) in the R. CellList cannot be relocated to any of the cells in C.CellList, then (2,2) will not be relocated even if it is possible to relocate it to (6,5)? Thanks, Remy _______________________________________________ 6tisch mailing list [email protected] https://www.ietf.org/mailman/listinfo/6tisch -- Dr. Xavier Vilajosana Wireless Networks Lab Internet Interdisciplinary Institute (IN3) Professor (+34) 646 633 681 [email protected] http://xvilajosana.org http://wine.rdi.uoc.edu Parc Mediterrani de la Tecnologia Av Carl Friedrich Gauss 5, B3 Building 08860 Castelldefels (Barcelona). Catalonia. Spain _______________________________________________ 6tisch mailing list [email protected] https://www.ietf.org/mailman/listinfo/6tisch
