Abstract: The invention concerns a system for multipoint-to-multipoint radio data transport, comprising a device for switching samples of digitised radio data called samples, transmitted by a device for the digital processing of antenna signals called antenna device (RU1, RU2), via a first data link (DL11, DL12), to a plurality of recipient antenna controller devices (DU1, DU2) identified by a respective plurality of controller identifiers, the switching device (DD) comprising the following modules: interception of first data frames (T11, T12) from the antenna device and intended for the plurality of controller devices, the first frames comprising the samples, demultiplexing the samples from the intercepted first data frames, extracting the controller identifiers from the intercepted first data frames, grouping together the demultiplexed samples by controller identifier, multiplexing the samples by group in second data frames (T21, T22), a second data frame being associated with a controller identifier, transmitting th

Abstract: A transmission system includes: an optical transmission module capable of modulating a first digital radio signal in order to obtain a first optical signal; an optical reception module capable of receiving a second optical signal and demodulating same in order to obtain a demodulated radio signal; and a digitizing module capable of digitizing the demodulated radio signal in order to obtain a second digital radio signal. The transmission module includes: a module for adding a first management signal to the first digital radio signal, the rate of the first management signal being less than that of the first digital radio signal. The optical digitizing module includes an extraction module capable of extracting a second management signal from the demodulated radio signal, the rate of the second management signal being less than that of the second digital radio signal.

Abstract: A transmission system includes: an optical transmission module capable of modulating a first digital radio signal in order to obtain a first optical signal; an optical reception module capable of receiving a second optical signal and demodulating same in order to obtain a demodulated radio signal; and a digitizing module capable of digitizing the demodulated radio signal in order to obtain a second digital radio signal. The transmission module includes: a module for adding a first management signal to the first digital radio signal, the rate of the first management signal being less than that of the first digital radio signal. The optical digitizing module includes an extraction module capable of extracting a second management signal from the demodulated radio signal, the rate of the second management signal being less than that of the second digital radio signal.

Abstract: The invention concerns a system for multipoint-to-multipoint radio data transport, comprising a device for switching samples of digitised radio data called samples, transmitted by a device for the digital processing of antenna signals called antenna device (RU1, RU2), via a first data link (DL11, DL12), to a plurality of recipient antenna controller devices (DU1, DU2) identified by a respective plurality of controller identifiers, the switching device (DD) comprising the following modules: interception of first data frames (T11, T12) from the antenna device and intended for the plurality of controller devices, the first frames comprising the samples, demultiplexing the samples from the intercepted first data frames, extracting the controller identifiers from the intercepted first data frames, grouping together the demultiplexed samples by controller identifier, multiplexing the samples by group in second data frames (T21, T22), a second data frame being associated with a controller identifier, transmitting th

Abstract: In a first aspect, the present invention provides a base band unit (BBU) (or a remote radio head (RRH)), including means for supplying an identifier of said unit to a microwave head (MWBBU or MWRRH)) connected to said BBU (or RRH) unit, the identifier being located within at least one predetermined control subchannel of a signal for digital radio. In a second aspect, the invention also provides a base band unit (BBU) (or a remote radio head (RRH)), including means for receiving an identifier of an RRH (or BBU) unit from a microwave head (MWBBU, or MWRRH)) to which said BBU (or RRH) unit is connected, the identifier being contained in at least one predetermined control subchannel of a signal for digital radio.

Abstract: A method for determining at least one parameter of a periodic spin function ?(z) with period p, to be applied to an optical fiber along its length z during a drawing process. At least one parameter is selected so that (I) where ?1 is about 0.05 and y1 is the first of the three components y1(z), y2(z), y3(z) of a periodic function y(z) of period p such that (II) where LB is an expected beat length of said optical fiber and ?(z) is the derivative of the spin function ?(z) with respect to the length z. The method is effective for substantially reducing the PMD of optical fibers drawn when applying a spin function.

Abstract: A method for determining at least one parameter of a periodic spin function &agr;(z) with period p, to be applied to an optical fibre along its length z during a drawing process. At least one parameter is selected so that (I) where &egr;1 is about 0.05 and y1 is the first of the three components y1(z), Y2(z), y3(z) of a periodic function y(z) of period p such that (II) where LB is an expected beat length of said optical fibre and &agr;(z) is the derivative of the spin function &agr;(z) with respect to the length z. The method is effective for substantially reducing the PMD of optical fibres drawn when applying a spin function.