SUMMARYThe prospects of multimedia in mobile communication depend largely on effective design of interactive multimedia applications now. Multimedia Messaging Service (MMS) and streaming are two potential multimedia applications for mobile communication. Though MMS has many advantages, a limitation is noted in MMS}an inability to handle a message requiring more space than available in a mobile terminal, as the message must be fully retrieved and stored before its presentation. Moreover, a large message can keep a recipient user waiting long for its retrieval before it is presented, causing poor user-experience. This paper proposes a new implementation solution for the interworking between MMS and streaming to overcome the limitation. The new solution is consistent with the existing frameworks and working principles of both MMS and streaming. The new solution is compared with the previous solutions, indicating that it has considerable advantages. This paper also presents general network architecture, providing various architectural options, to accommodate the interworking in different situations. The architecture considers many practical cases, like person-to-person messaging, messaging involving content providers and multiple network operators, load balancing and scalability in related network servers, operational agreement between a content provider and a network operator, and using existing network infrastructure for the interworking.