Firm assets are the most important element in strategy formulation and implementation. A company’s grounds to success can be found here. However, not all are equally important. Some will be considered strategic and others ordinary, depending on how influential they are when it comes to obtaining and appropriating rents, as well as how they hold up during a span of time. This will depend upon th...

The management of the mobility between radio networks composed of heterogeneous radio technologies, called inter-access mobility management, provides the capability to tie together heterogeneous radio networks into an integrated network. The 3GPP architectures with well-designed inter-access mobility management capabilities are a part of the solution to cope with the growth of the mobile data t...

The mobility management is a significant issue in 4G heterogeneous networks. However, the mobility needs to be managed by upper layer in the networks because of the limitation of mobility management at link layer. Session Initiation Protocol (SIP) supports personal mobility so that a user can be found independent of location and network device. But it cannot support IP mobility and cannot maint...

Base IP mobility presents performance limitations when the mobile host increases its handoff rate between successive wireless points of attachment as a result of its mobility pattern. These limitations are augmented when latency externalities such as the round trip time between the MN and its peers, add to the total of latency and signalling overhead, impeding the performance of the mobility fu...

Polly is an inexpensive, portable telepresence device based on the metaphor of a parrot riding a guide’s shoulder and acting as proxy for remote participants. Although remote users may be anyone with a desire for ‘tele-visits’, we focus on limited mobility users. We present a series of prototypes and field tests that informed design iterations. Our current implementations utilize a smartphone o...

Polly is an inexpensive, portable telepresence device based on the metaphor of a parrot riding a guide’s shoulder and acting as proxy for remote participants. Although remote users may be anyone with a desire for ‘tele-visits’, we focus on limited mobility users. We present a series of prototypes and field tests that informed design iterations. Our current implementations utilize a smartphone o...