A method and apparatus for a transmitter having a radio protocol with an upper layer and a lower layer therein used for management of full header transmission when transmitting data packets to a receiver are provided. The method comprises controlling a transmission of a full header packet by information from the lower layer, whereby, if the upper layer receives from the lower layer, information of a failed transmission of at least one packet, the upper layer decides whether to send a next packet as a full header packet.

 
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> Frequency error estimation algorithm

~ 00495