| 摘要 |
A group of computer processing devices are arranged to co-operate to host services for use by each other. Each device stores information relating to the devices known to have such services installed ( 38 ). When one of the devices requires a service that it does not already have installed, it transmits a request ( 32, 35 ) for the required service. If a neighbouring device is able to provide the service, it responds accordingly ( 33, 34, 36, 37 ) and supplies the requested service ( 391 ). If a device is unable to identify sufficient suitable neighbouring host devices it may install the service itself ( 392 ) when an opportunity to do so is identified.
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