pUbLIS
2010-12-27, 09:42 PM
Hello to all RF gurus :)
I have a doubt that maybe some of you can help me.
I've just got a case of a nB that apparently has a high drop on PS calls on cell reselection.
I've been reading about cell reselection and, as far as I can understand, its a simple handover due to better conditions (radio measurements) on a neighbor cell.
Am I right? Is it a simple HO?
This was what I came up with (@ http://www.umtsworld.com/technology/RCC_states.htm)
http://www.umtsworld.com/technology/images/cell_reselection_25331.png
States and procedures in the cell reselection process in connected mode
When a cell reselection is triggered, the UE evaluates the cell reselection criteria based on radio measurements, and if a better cell is found that cell is selected, procedure Cell reselection. If the change of cell implies a change of radio access technology, the RRC connection is released, and the UE enters idle mode of the other RAT. If no suitable cell is found in the cell reselection procedure, the UE eventually enters idle mode.
When an Initial cell reselection is triggered, the UE shall use the Initial cell reselection procedure to find a suitable cell. One example where this procedure is triggered is at radio link failure, where the UE may trigger an initial cell reselection in order to request re-establishment of the RRC connection. If the UE is unable to find a suitable cell, the UE eventually enters idle mode.
Cheers
I have a doubt that maybe some of you can help me.
I've just got a case of a nB that apparently has a high drop on PS calls on cell reselection.
I've been reading about cell reselection and, as far as I can understand, its a simple handover due to better conditions (radio measurements) on a neighbor cell.
Am I right? Is it a simple HO?
This was what I came up with (@ http://www.umtsworld.com/technology/RCC_states.htm)
http://www.umtsworld.com/technology/images/cell_reselection_25331.png
States and procedures in the cell reselection process in connected mode
When a cell reselection is triggered, the UE evaluates the cell reselection criteria based on radio measurements, and if a better cell is found that cell is selected, procedure Cell reselection. If the change of cell implies a change of radio access technology, the RRC connection is released, and the UE enters idle mode of the other RAT. If no suitable cell is found in the cell reselection procedure, the UE eventually enters idle mode.
When an Initial cell reselection is triggered, the UE shall use the Initial cell reselection procedure to find a suitable cell. One example where this procedure is triggered is at radio link failure, where the UE may trigger an initial cell reselection in order to request re-establishment of the RRC connection. If the UE is unable to find a suitable cell, the UE eventually enters idle mode.
Cheers