Communications between a base station and a mobile station is improved through using a
relay station. A transmit timing of relayed signals from the relay station is controlled so that …

BACKGROUND In conventional cellular networks, mobile devices commu nicate individually
with the base station and are susceptible to severe channel fading. Diversity techniques in …

A method and a device for transmitting a multimedia broadcast multicast service are
provided. The method includes one or more base stations encode and modulate the original …