Time space time switching pdf

Time division switching in space division switching, crosspoints are used to establish a specific connection between two subscribers. Timeswitching spacetime multiuser detection for cdma. Adaptive switching between spacetime and spacefrequency block coded ofdm systems in rayleigh fading channel. A complete video lecture course with anaimations on telecom technology. A space switch carrying time multiplexed input and output signals can be logically converted into a pure space switch without cyclic control by distributing each timeslot into its own space switch. Pdf adaptive switching between spacetime and space. Delay samples so that they arrive at the right time for the space division switch.

Mancuso messagepacket switching vs circuit switching router router header mesgpack router. Space switch vs time switchdifference between space,time. A switch transfers signals from one input port to an appropriate output. The time division switching is divided into digital and analog switching systems. The pcm word from one of several incoming highways can be forwarded. The design and analysis of the cdma system with array antennas are presented. Reliability and performance analysis of time space.

Time space time tst switch with combined and distributed state. Time division switches may also employ space division switching techniques, whereas an appropriate mixture of both time and space division switching is advantageous in various circumstances. In this section, the space division switching is described and in section 5. We develop a spacetime multiuser detection approach for uplink channels of cdma systems with a timeswitching technique. A timespace time tst switch figure 20 has r input lines and r output lines, each carrying. Residential lines are busy 510% of the time during the busy hour. Requirement for nonblocking in the worst case, all the subscribers. The spacetime switch works on the same principles as the time switch. If the coded values are transferred during the same time interval from input to output, the technique is called space switching. The digital switching system is classified into space switch, time switch and. The xen processor contains a time switch, enabling a time slot on any of the digital trunks to be switched to any timeslot on either 1024 time slot cas highways.

A time space ts switch takes the outputs of several timedivision switches, for example, tsi switches and connects them as inputs as a space division switch. It was originally designed for analog networks, but is used currently in both digital and analog switching. The 64mbps streams implements a 1024 time slot pcm highway towards the space switch also called the cas highway. Reliability and performance analysis of time space time switching networks with multiple separated space switches. One way in which the operating speed and the number of simultaneous connections can be increased is the spacetime switching. The effect of this paired arrangement is that packets can be swapped between different output lines. A time space time tst switch using two basic modules, a time switching module and a space switching. It gives classification of switching in telephone systems. Alternately we may perform the ts interchanging first i. Adaptive switching between spacetime and spacefrequency block coded ofdm systems conference paper pdf available december 2008 with 116 reads how we measure reads. After that, time switching and packet switching are discussed and.