METHOD FOR CALL SETUP TIME IMPROVEMENT FOR 3G-234M

摘要

The call setup time, after bearer channel setup, in 3G-324M systems is currently in the order of magnitude of ten to twenty seconds. The resulting user experience is such that users have to wait 10 seconds or even longer for a video phone call to connect, than for a voice call. Thus, a technique for call setup time improvement is required. Several proposals have been made in relevant standardization bodies. The two recent ones that have seen the most interest from standardization groups are perhaps FastMedia (FM) and Fast Session Setup (FSS). FastMedia operates by pre-populating the ITU-T Recommendation H.223 Multiplex table with hard-coded operation points. If FastMedia fails (NO in step S21), the prior art falls back to legacy and slow H.245. According to the invention, instead of falling back to legacy and slow H.245, a known FSS procedure such as Fast Logical Channel Setup, if present, is invoked (step S23).