Abstract: A mobile telecommunications local area network (20) is described with a concentrator (32) connected to a plurality of radio heads (36, 38) via a local area network (LAN, 20). The concentrator (32) provides remote control of a local timing signal individually in each radio head. The control may be open loop or closed loop and may be provided through the LAN. The concentrator may also provide digital signal processing (DSP) as a shared resource for the radio heads (36, 38). The DSP may include channel coding. The radio heads (36, 38) may provide modulation for channel coded signals transmitted from the concentrator (32) via the LAN (20). The LAN may be wired LAN or a wireless LAN.

Abstract: A mobile telecommunications local area network (20) is described with a concentrator (32) connected to a plurality of radio heads (36, 38) via a local area network (LAN, 20). The concentrator (32) provides remote control of a local timing signal individually in each radio head. The control may be open loop or closed loop and may be provided through the LAN. The concentrator may also provide digital signal processing (DSP) as a shared resource for the radio heads (36, 38). The DSP may include channel coding. The radio heads (36, 38) may provide modulation for channel coded signals transmitted from the concentrator (32) via the LAN (20). The LAN may be wired LAN or a wireless LAN.

Abstract: A mobile telecommunications local area network (20) is described with a concentrator (32) connected to a plurality of radio heads (36, 38) via a local area network (LAN, 20). The concentrator (32) provides remote control of a local timing signal individually in each radio head. The control may be open loop or closed loop and may be provided through the LAN. The concentrator may also provide digital signal processing (DSP) as a shared resource for the radio heads (36, 38). The DSP may include channel coding. The radio heads (36, 38) may provide modulation for channel coded signals transmitted form the concentrator (32) via the LAN (20). The LAN may be wired LAN or a wireless LAN.

Abstract: In a method of interleaving and deinterleaving STM-1 and STM-N SDH frame pointers transmitted between a transmitter and a receiver, each frame comprising a section overhead area, a pointer area and a payload area including the data to be transmitted. At the transmitter, the bits of the pointer area and those of the payload area are interleaved according to an interleaving law retaining the position modulo 24 in the interleaved bits. The interleaving produces an interleaved frame transmitted to the receiver at which it is deinterleaved using a law that is the reciprocal of the interleaving law. This interleaves all the bits of pointers in the frame without changing the values of the B1 and B2 parity control bytes.