Abstract: The system allows a group of end apparatuses (101, 102, 103, . . .), such as a game computer or a PDA, to communicate wirelessly, for instance via infra-red. In order to increase the reliability of the communication, the end apparatuses communicate via a central apparatus 100. This makes it easier to maintain contact. Furthermore, conventional acknowledgement schemes can be used to increase the reliability of the communication between an end apparatus and the central apparatus 100. Each end apparatus comprises execution means 240 for executing a group application. During the execution, the group application communicates to a corresponding group application in at least one end apparatus. The communication takes place by exchanging application messages. To this end, an end apparatus uses message sending means 200 to send the application message to the central apparatus 100. Message receiving means 210 of the central apparatus 100 receive the message.

Abstract: The system allows an apparatus, such as a computer or a PDA, to establish communication between a local application and applications in at least one other apparatus. The communication is established when a user of an apparatus triggers execution of a seection application. An active activation unit invites applications in the other apparatuses to join by using a message sending unit to transmit a broadcast frame to all apparatuses, requesting activation of the selected application. The broadcast frame specifies which application is being activated. The active activation unit then determines a communication channel which corresponds to the application and the selected application, stored in storage, is executed by an execution unit. The broadcast frame is received by a message receiving unit in other apparatuses. A passive activation unit verifies whether the receiving apparatus has an application, which corresponds to the specified application and whether such an application needs to be activated.