A Cooperative Strategy for Transmitting Data Traffic in Hotspot Cellular Mobile Communications

The QoS requests of data traffic with lower priority in hotspot areas are not always satisfied in a traditional cellular wireless communication system. But on the other hand, about 60% of the channel slots allocated to a voice user is wasted due to the spurt of speech packets. In this paper, a cooperative strategy for transmitting data packets and speech spurt packets over the shared channel of voice user is proposed in the hotspot scenario, which is mainly based on cooperative principle and data/voice traffic characteristics. By exploiting the "silent intervals" between talk-spurts, a voice user can transmit data packets for a data user who is blocked since cellular networks are under heavy traffic. The simulations show that the proposed strategy can effectively reduce both the delay and packet drop-rate of data traffic and does not affect the QoS of voice traffic.