Radio Communication System, Ratio Station, Radio Terminal, Communication Control Method, And Non Temporary Computer Readable Medium

Abstract: A r a d i o t e rmi n a l ( 3 ) c a n p e rf o rm c a rri e r a g g r e g a t i o n u si n g a first c e l l ( 1 0 ) o f a first r a d i o st a t i o n ( 1 ) a n d a s e c o n d c e l l ( 2 0 ) o f a s e c o n d r a d i o st a t i o n ( 2 ). Th e first r a d i o st a t i o n ( 1 ) p e rf o rms , wi t h t h e r a d i o t e rmi n a l ( 3 ), r a d i o r e s o u r c e c o n tr o l f o r t h e first c e l l ( 1 0 ) a n d t h e s e c o n d c e l l ( 2 0 ) i n o r d e r t o p e rf o rm t h e c a rri e r a g g r e g a t i o n . A t l e a st o n e o f t h e s e c o n d r a d i o s t a t i o n ( 2 ) a n d t h e r a d i o t e r m i n a l ( 3 ) i s c o n f i g u r e d t o t r a n s m i t , t o t h e f i r s t r a d i o s t a t i o n ( 1 0 ) , i n f o r m a t i o n a b o u t a p r o b l e m o c c u r r i n g i n a r a d i o l i n k i n t h e s e c o n d c e l l ( 2 0 ) b e t w e e n t h e s e c o n d r a d i o s t a t i o n ( 2 0 ) a n d t h e r a d i o t e r m i n a l ( 3 0 ) w h i l e t h e c a r r i e r a g g r e g a t i o n o f t h e f i r s t c e l l ( 1 0 ) a n d t h e s e c o n d c e l l ( 2 0 ) i s b e i n g p e r f o r m e d . I t i s t h u s , f o r e x a m p l e , p o s s i b l e t o r e d u c e p a c k e t l o s s e s c a u s e d b y a n o c c u r r e n c e o f a r a d i o l i n k p r o b l e m ( e . g . , a n R L F ) i n a s e c o n d a r y c e l l d u r i n g c a r r i e r a g g r e g a t i o n o f a p l u r a l i t y o f c e l l s s e r v e d b y d i f f e r e n t r a d i o s t a t i o n s .

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