Patent EA-000209-B1 (EA)
Title: PROCESS FOR OPERATING A MULTISTAGE N x N SPACE-SWITCHING ARRANGEMENT
Inventor: JAHREIS OLIVER
IPC: H04Q3/52
Filed: 1996-01-01
Abstract: 1. Process for operating (2x(log2 N) -a multstage NxN space switching arrangement (R) with N = 2<n> - with n - being 1, 2, 3,...- following after input (e1,..., eN) space switching arrangement (log2 N)-stage input pyramids (E1,..., EN) capable of two connection states 1x2 switches and with N = 2<n> preceding output (a!,..., aN) space switching arrangement (log2 N)-stage output pyramids (A1,...,AN) capable of two connection states 1x2 switches and also running between input and output pyramids canonical network N<2> of intermediate lines (1z1,..., NzN), in which critical is an intermediate crosstalk between inputs, shifted correspondingly by M = 2<m> (with m being 1, 2,..., n-1) or multiple of it, when there a direct connection between two intermediate lines (izl, izp) at each of the 2<n-1> pyramid base side 1x2-switches (i31) of n-stage pyramids (Ei) of 1x2-switches, characterized in that in running from j-th input pyramid (Ej) to output pyramid (Ap) crosstalk path, which from input (ej) of input pyramid (Ej) via n connecting said input (ej) with output of input pyramid (ejp)of 1x2-switches (j11, j21, j31),via connecting output of input pyramid (ejp) with corresponding input of output pyramid (jpa) intemediate line (jzp) and via n connecting said input of output pyramid (jpa) with output (ap) of output pyramid (Ap) of 1x2-switches (33p, 22p, 11p) reaches this output (ap), and which introduces a crosstalk in running from i-th - with | i-j | = vx2<n>; v = 1, 2, ... - input pyramid (Ei) to said output pyramid (Ap) connection path which from input (ei) of input pyramid (Ei) via n connecting said input (ei) with output of input pyramid (eip) of 1x2-switchea (i11, i21, i31), via connecting output of input pyramid (eip) with corresponding input of output pyramid (ipa) intermediate line (izp) and via n connecting said input of output pyramid (ipa) with output (ap)of output pyramid (Ap) of 1x2-switches (31p, 21p, 11p) reaches this output (ap), all not included simultaneously in a connection path of 1x2-switches (j31, 33p, 22p) are switched into the switching state directed away from the crosstalk path. 2. Process according to Claim 1, wherein said process realised in NxN space switching arrangement with located on the side of input wavelength demultiplexors (WD1, ..., WD1), separating by wavelength entering on the corresponding input (L1, ..., L1) WDM signal, followed by NxN space switching arrangement (R), formed by pyramids capable to two switching states of integrated-optical NxN -switching arrangement, in which light of the same wavelength is generated at each input (ei) being repeated at intervals of M = 2<m> - with m = 1, 2, ..., n-1 inputs and after which in case of integrated-optical NxN -switching arrangement and wavelength arrangement can be followed by adjustable wavelength converters (λ/λp) which convert correspondingly receiving wavelength to a rigid output wavelength, and with located on the side of output wavelength multiplexor (WM1, ..., WN1), correspondingly uniting fed to them signals of different wavelength into WDM-signal. 3. Process according to Claim 1 or 2, wherein in input pyramid (Ej) a maximum m are not simultaneously included in a connection path and lie between the pyramid input (ej) the pyramid output (ejp) of 1x2-switches connected to the output pyramid (Ap), and in output pyramid (Ap) always m are not simultaneously included in a connection path and lie between connected to the input pyramid (Ej) the input pyramid (jpa) and the pyramid output (ap) of 1x2-switches (33p, 22p) include in the switching state directed away from the crosstalk path.