Ericsson is on the top of the pack, NSN, Huawei and ALU are following. \blogs.nokiasiemensnetworks.com
The worldwide LTE infrastructure market for radio and core service architecture evolution equipment is expected to grow from $4.1 billion in 2012 to $21.1 billion in 2016. This segment is expected to grow to over 40% of mobile infrastructure spend in 2016 and become the fastest-growing segment within mobile network infrastructure (radio and core).
Source: Gartner “Magic Quadrant for LTE Network Infrastructure” by Sylvain Fabre, Frank Marsala, Jessica Ekholm, Akshay K. Sharma, Joy Yang, Akiyoshi Ishiwata, Deborah Kish, Tina Tian. Published 12 July 2012