Patent ID: 8780929

Claim:
An apparatus within a mobile station (MS) for transmitting data, the apparatus comprising: receiving means for receiving, internally within the MS, data from an application within the MS; segmenting means for segmenting the data received from the application into data frames; buffering means for buffering the data frames from the segmenting means; transmitting means, connected to the buffering means to receive data frames therefrom, for transmitting the data frames; and controlling means for controlling the segmenting means, the controlling means being arranged to receive parameter data from the segmenting means pertaining to the segmented data frames and radio link resources data from the transmitting means pertaining to the transmission of data frames, to calculate a high watermark value and a low watermark value in response to the received parameter data and radio link resources data corresponding to maximal and minimal numbers of data frames to be buffered in the buffering means, and to control the segmenting means to maintain the number of data frames in the buffering means between the and low watermark values, wherein the controlling means is further arranged to calculate a size of a largest frame from the largest data frame that may be passed to the transmitting means for transmission, wherein the high watermark value is calculated from the calculated size of the largest frame.