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 packet transmission when transmitting data packets to a receiver are provided. If the upper layer receives from the lower layer, information of a successful transmission of a full header packet, the upper layer decides to stop sending any additional full header packet that contains the same full header as the previously successfully transmitted full header packet.

 
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< Group Call Management

> Method for the Transmission of Data to at Least One listening User of an on-Going Group Call Immediately After Switching Speakers

> Noise variance estimation for frequency domain equalizer coefficient determination

~ 00562