We present the Type-Specific Convex Ceiling Protocol (TCCP) for controlling real-time concurrent transactions with read and write operations. Using TCCP, real-time transactions will have more predictable temporal behaviors. This is a mandatory requirement for real-time systems. To maintain data access consistency, TCCP utilizes a deadlock-free concurrency control that guarantees the serializability of real-time transactions. Moreover, TCCP takes type-specific semantics into consideration and thus provides a better performance than the traditional two-phase locking protocol.