Abstract: A system and method for retransmission of voice packets in wireless communications are provided. The method includes transmitting a voice packet from a base station to a communication unit or from a communication unit to a base station at a rate faster than a generation rate of the voice packet. The method further includes determining whether the transmitted voice packet is successfully received and retransmitting the voice packet if not successfully received. The number of retransmissions is limited by a predetermined value.

Abstract: A wireless communications system has a plurality of base stations 1, a plurality of mobile vehicular repeater units 2, and a plurality of portable units 3. In a public safety network context, each mobile vehicular repeater unit 2 is associated with a portable unit 3, and both are associated with a single user. The object is for the user to be able to access the wireless network for any geographic location. In cases where a geographic area is shadowed from a base station 1 and communication directly between the portable unit 3 and the base station 1 is not possible, it is beneficial to use the mobile vehicular repeater unit 2 as a vehicular repeater to relay communications between the portable unit 3 and the base station 1. When the mobile vehicular repeater unit 2 is operating as a repeater and communicating with the portable units, the frequency plan for transmission and reception is reversed.