A survey of mobile cloud computing: architecture, applications, and approaches
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5.1. Low bandwidth
Although many researchers propose the optimal and effi- cient way of bandwidth allocation, the bandwidth limita- tion is still a big concern because the number of mobile and cloud users is dramatically increasing. We consider that fourth generation (4G) network and Femtocell are emerg- ing as promising technologies that overcome the limitation and bring a revolution in improving bandwidth. (1) 4G network. Fourth generation network is a technol- ogy that significantly increases bandwidth capacity for subscribers. 4G network is capable of providing up to 100 Mbit/s (for ‘LTE Advanced’ standard) and 128 Mbit/s (for ‘WirelessMAN-Advanced’ stan- dard) for mobile users, whereas the current 3G network supports a maximum of 14.4 Mbit/s. Furthermore, 4G network also promises other advantages such as widering mobile coverage area, smoothering quicker handoff, varied services, and so on [109]. Nevertheless, 4G wireless networks still have several issues related to network architecture, access protocol, or QoS that are taken into account in [110]. (2) Femtocell. Femtocell [111] is a small cellular base station, designed for use in a small area. Hay Systems Ltd (HSL) [112] develops a service to com- bine femtocells and CC to deliver a highly eco- nomical, scalable, and secure network for mobile operators. This allows the resources employed in delivering mobile services over the femtocell net- work to expand or contract as user demands for ser- vices increase or decrease, respectively. The result is a highly economical femtocell network with only sufficient resources being used at any given point, without impacting the ability to immediately scale to meet demands. In this paradigm, femto- cells located in homes and offices of users con- nect via the Internet to the cloud to gain access to their operator’s network. Mobile operators con- nect with the cloud enabling their subscribers to gain access to their network when using a femto- cell connected to the cloud. However, [112] just shows that femtocell is practically useful when used with clouds. We need to investigate a uniform stan- dard and performance impact of using femtocells in MCC. Download 1.54 Mb. Do'stlaringiz bilan baham: |
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