Buffered Type-II Hybrid ARQ Protocol for DS-SSMA Packet Radio Systems

The perform ance and stability of a slotted direct-sequence spread-spectrum multiple-access (DSSSMA) packet radio network employing the type-II hybrid automatic-repeatrequest (ARQ) protocol with ® nite-length transm itter buffers are considered. The equilibrium point analysis (EPA) technique is employed to analyze the system stability and to approxim ately compute the system throughput, delay, and packet rejection probability. It is found that the system exhibits bistable behavior in some situations. Issues of system design, such as the required length of the transmitter buffers and the desirable region of operation based on a predetermined perform ance requirement for packet rejection, are also investigated.