segmention --> rectifies internal fragmentation
paging scheme--> rectifies external fragmentation
combine the both schemes and eliminates both problems in
managing the memory

paged segmentation

divide program's logical addressspace into one or more segments
maintain a pagetable for each segment
each segment pointer points to page table

segment paging is opposite to above explanation

For Better understanding use this link
http://www.cs.rochester.edu/u/www/courses/456/spring99/lecture/lecture7.html