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A Heterogeneous wireless network (HWN) is a special case of a Heterogeneous network (HetNet). Whereas a HetNet may consist of a network of computers or devices with different capabilities in terms of operating systems, hardware, protocols, etc., a HWN is a wireless network which consists of devices using different underlying radio access technology.〔 〕 There are several problems still to be solved in heterogeneous wireless networks such as: * Determining the theoretical capacity of HWNs 〔 〕 * Interoperability of technology 〔 〕 * Handover * Mobility * Quality of Service / Quality of Experience * Interference between RATs 〔 〕 There are several benefits to a HWN as opposed to a traditional homogeneous wireless network including increased reliability, improved spectrum efficiency, and increased coverage. Reliability is improved because when one particular RAT within the HWN fails, it may still be possible to maintain a connection by falling back to another RAT. Spectrum efficiency is improved by making use of RATs which may have few users through the use of load balancing across RATs and coverage may be improved because different RATs may fill holes in coverage that any one of the single networks alone would not be able to fill. ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Heterogeneous wireless network」の詳細全文を読む スポンサード リンク
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