Abstract: A wireless access device is operable in a mode in which its maximum transmit power is set to a value that means that the device has a range of less than 1 metre. This allows the device to operate as a basestation in a cellular communications network, even in locations in which it is not specifically licensed, because the power level is so low that it will not cause interference on the licensed frequencies. The wireless access device is designed such that a handheld portable device can be maintained in a close spatial relationship to it.

Abstract: A method (400) of preloading data on a cache (210) in a local machine (235). The cache (210) is operably coupled to a data store (130), in a remote host machine (240). The method includes the steps of determining a user behaviour profile for the local machine (235); retrieving data relating to the user behaviour profile from the data store (130); and preloading the retrieved data in the cache (210), such that the data is made available to the cache user when desired. A local machine, a host machine, a cache, a communication system and preloading functions are also described. In this manner, data within the cache is maintained and replaced in a substantially optimal manner, and configured to be available to a cache user when it is predicted that the user wishes to access the data.