Which reference point is used between the UTRAN and the Serving Gateway for user plane
tunneling when a direct tunnel is established?
A.
S8a
B.
S5
C.
S4
D.
S12
Which reference point is used between the UTRAN and the Serving Gateway for user plane tunneling when a direct tunnel is established?
Which reference point is used between the UTRAN and the Serving Gateway for user plane
tunneling when a direct tunnel is established?