Abstract: Differential time synchronization and scheduling may be provided. A first Access Point (AP) may wirelessly receive time-base translation parameters of a second AP. The first AP and the second AP may be neighboring. Next, a first transmission schedule for the first AP and a second transmission schedule for the second AP may be maintained. Then the second transmission schedule for the second AP may be translated into a time-base of the first AP based on the time-base translation parameters of the second AP. Then the first AP may transmit based upon the first transmission schedule for the first AP and the translated second transmission schedule for the second AP.

Abstract: Excess slot-time re-farming may be provided. A first Access Point (AP) may be received by a first Access Point (AP). Next, excess time in the slot allocation may be determined. Then wireless exchanges may be used to allocate the excess time in the slot allocation to a second AP.

Abstract: A light-tight package for a roll 1 of light sensitive material has a central core 4 around which the material is wound, a flexible opaque leader 6 having a trailing end attached to the outermost end of the material and a pair of flexible end discs 7, 8 covering each end of the roll. Each end disc has a central hole 10 smaller than the inner diameter of the core, the inner diameter edge 9 of the disc being sealed to the inner wall of the core in the form of an unbroken seal.