TCP/IP data transfer over the DECT air interface with multibearer capability and support of asymmetric flows

This works aims at evaluating achievable performance for TCP/IP data transf er over DECT radio interface, by verifying the ability of DECT lower layers protocols, namely DLC and MAC, to mask the radio interface unreliability a nd to provide flexible transfer means for TCP data. Major points are: (i) t he interplay of error recovery mechanisms at the various layers; (ii) the e ffectiveness of providing multibearer capabilities (i.e. allowing slot bund ling in the radio access); (iii) the possible gains brought about by MAC as ymmetric connections in view of essentially asymmetric TCP data flows. Obtained results indicate that satisfactory performance can be obtained, si nce the lower layers recovery functions are able to mask even a rather pess imistic radio channel behavior as here assumed. This comes at the price of about half of the gross available capacity, because of static overhead and radio channel impairments, which is anyway in the order of (often less than ) typical overhead due to radio communication protecting codes, e.g., as de fined in GSM, UMTS, CDPD.