From a recent NTT Docomo presentation (embedded below). Whereas right now 3GPP has only been working on FDD or TDD scenarios, this proposal is a combination of FDD as P-Cell and TDD as S-Cell. Inter-Technology carrier aggregation is another possible option. Anyway, the complete presentation is below.
LTE-Advanced Enhancements and Future Radio Access Toward 2020 and Beyond from Zahid Ghadialy
Updated on 29/10/2013
3GPP has already started working on this work item. See RP-131399 for details.
Updated on 29/10/2013
3GPP has already started working on this work item. See RP-131399 for details.
This is very interesting. However it will be very complex for a UE to support CA on TDD and FDD with either one acting as a P-cell. I am not sure whether any one will be going for this approach given the fact that CA on FDD alone has been such a struggle.
ReplyDeleteIt's a work item for rel.12 in 3GPP ran1. But there is no limitation FDD is Pcell or TDD is Pcell
ReplyDeleteHi Jianjun, thanks. I just found out myself and added the reference to the blog post.
ReplyDeleteHi, just to add a point , utilizing FDD can cover larger area and in the other side TDD can assign more downlink capacity, although for operators it is more useful to work with TDD but mostly they are working with FDD.
ReplyDeleteAccording to different requirements operators may use combination of both technologies as mentioned in previous comments :)
it seems to be very interesting idea. At least I believe, this is a further improvement of the current FDD for macro with TDD hotspot deployment. This is a WF for the phantom cell concept that they have been discussing for quite a while.
ReplyDeleteThe problem probably will be the signalling issues for cross component scheduling, but they don't have to use it at the beginning. As far as I can remember, each of the carrier component can formulate its own cell, and have different transmit power.