5.4 Non-Transparent data transmission

23.0343GPPHigh Speed Circuit Switched Data (HSCSD)Release 17Stage 2TS


Non-transparent mode of HSCSD is realized by modifying the RLP and L2R functions to support multiple parallel TCH/Fs instead of only one TCH/F (figure 9a). In addition the RLP frame numbering is increased to accommodate the enlarged data transmission rate.

The detailed specification of the RLP is given in 3GPP TS 24.022 [5], and L2R is defined in 3GPP TS 27.002 [13] and 3GPP TS 27.003 [14].

Figure 9a: The HSCSD concept in non-transparent mode