Embodiments of the present invention provide systems and methods for converting a higher-resolution image to a lower-resolution image with reduced visible errors. A wireless communication device such as a cell phone will operate under one radio link protocol to engage in packet-based signaling for setup of a packet-based real-time media session such as a push-to-talk session. Instruction set workload processing characteristics are stored for reference in scheduling subsequent execution of the instruction set. An improved protection against failure and error analysis in the event of transmission errors are ensured by the ring-shaped structure using bidirectional communication paths. Then, the suffix indicated by the GETREPLY is set as the suffix of the GET_NEXT command to be transmitted next, and the same operation is repeatedly performed.