| 摘要 |
FIELD: information technology. ^ SUBSTANCE: method involves the following: allocating essential control information of a first system to a first sub-frame in a frame including a plurality of sub-frames each of which comprises a plurality of orthogonal frequency-division multiplexing (OFDM) symbols; and allocating essential control information of a second system to an nth sub-frame in a fixed position from the first sub-frame (where n is an integer satisfying n>1). Accordingly, in a frame supporting heterogeneous systems, essential control information can be fixedly allocated to a specific position while maintaining the number of system switching points, at which switching occurs between the systems, to one even if a radio resource allocation amount changes between the systems, and thus the essential control information that must be received by all user equipment can be effectively provided without increase of overhead. ^ EFFECT: possibility of allocating essential control information in an evolution system which satisfies backward compatibility with a legacy system. ^ 15 cl, 1 tbl |
