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What is the difference between the concepts of dual connectivity and phantom cell?

+4 votes
138 views

Based on my understanding, the concept of phantom cell was proposed by DOCOMO and the concept of dual connectivity was proposed by 3GPP. In phantom cell, control- and user-plane are split. Specifically, control plane is maintained in marcocell and user plane is maintained in small cell. However, in dual connectivity, both control and data plane are maintained in marcocell and only user plane is maintained in small cell. Is it right?

posted May 25, 2015 by anonymous

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1 Answer

+1 vote

No difference , Its the same thing where a UE is simultaneously connected to two cells (one Macro , one small cell)
The Macro cell will use a different frequency (lower) than the frequency used by small cell (higher)
There are two variations here though :
1. Control signalling handled exclusively by Macro cell and Data/user plane handled exclusively by Small cell.
2. Control plane handled by macro or small cell and data plane divided between Macro and small cell.

Dual connectivity: Devices maintain simultaneous connections to both macro and small-cell low-power layers to improve cell-edge throughput. Inter-node radio resource aggregation can use radio resources on a common frequency in more than one eNodeB. In addition, connections can be anchored to a macro cell on one frequency while boosting data-rates via the small cell on a different frequency.

answer May 26, 2015 by Saurabh Srivastava
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+1 vote

I want to know the views of the experts here on cloud RAN and small cell co-existence. Check the following link which says new development in this area - http://www.marketwatch.com/story/an-unlikely-marriage-cloud-ran-and-small-cells-2014-07-14

Now I have two question-
1. Is it technically feasible
2. If yes then what would be the business impact?

+6 votes

As per my knowledge, LTE technology has frequency reuse factor 1, which means same frequency can be used two or more eNodeBs. As per my knowledge, cell interference can be controlled by using different PCI to each of the neighbor nodes.

I want to know, Are there any other things being used to avoid cell interference in lte technology or just PCI i.e physical cell identity is just enough to avoid cell interference.

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