| 摘要 |
A method of performing communications of network devices (11E, 13) in a wireless sensor system formed of respective networks served by a first coordinator (10NB) for non beacon-mode communication and a second coordinator (10B) for beacon-mode communication, the network devices associated with at least one entity to be monitored and the method comprising: initially, placing all the network devices (11E, 13) in a first network served by the first coordinator (10NB); monitoring one or more parameter of the or each entity by sensors of the associated network devices (11E); transmitting sensor data from the network devices in the first network to the first coordinator (10NB); detecting starting or ending of an emergency state with respect to a said entity by using the monitored parameters; in response to detection of starting of the emergency state with respect to a said entity, handing over the associated network devices (11E) to the second network; transmitting sensor data from the network devices in the second network to the second coordinator (10B); and in response to detection of ending of the emergency state with respect to a said entity, handing over the associated network devices to the first network. The method may be applied, for example, to monitoring of patients in a hospital using MBANs operating in accordance with IEEE 802.15.6. |
