Yingrong Coral Sung

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Long Term Evolution (LTE) and Worldwide Interoperability for Microwave Access (WiMAX) are two major technologies toward next-generation mobile broadband standards, which are both expected to provide higher throughput and lower transmission latency for mobile users. This paper measures and compares the latency and the throughput of Time Division-Long Term(More)
Recently, smartphones have been used as remote controllers for home appliances through con-nectivity of mobile telecom network or Wi-Fi. To control several home appliances in a room, a mechanism is required for a smartphone to correctly select the target appliance. Through the built-in electronic compass function in the smartphone, we propose a scheme(More)
Long Term Evolution (LTE) evolved from Universal Mobile Telecommunications System (UMTS), which utilizes IP Multimedia Core Network Subsystem (IMS) to provide voice service. In most existing commercial operations, the LTE networks provide zonal coverage as compared with UMTS networks which provide full service coverage. A User Equipment (UE) can initiate or(More)
Long-term evolution (LTE) is a broadband wireless communication standard evolved from the Universal Mobile Telecommunications System (UMTS) network. A report from GSA (Global mobile Suppliers Association) said that there are 274 LTE networks have been launched in 101 countries until 2014 Feb [1]. This paper describes the background and current situation of(More)
When a mobile operator migrates its network from the 3rd Generation (3G) system to Long Term Evolution (LTE), both 3G and LTE will co-exist for a period of time. Since the 3G Circuit-Switched (CS) voice mechanism is more mature and available than that for LTE Voice over Internet Protocol (VoIP), the operator may consider CS fallback as a solution to provide(More)
Memory leaks generated by a running program may exhaust memory resources and degrade system performance. It is hard to reproduce these kinds of leaks, let alone to identify and fix them early in the development phase. Thus online memory leak detection is required. In this paper we propose a two-phase approach to the online memory leak detection problem for(More)
In 2003, the Parlay group proposed a concept and technique of the web service and proposed the other suite of Open Services Architecture (OSA) specifications, Parlay X. The Parlay X Application Programming Interface (API) defines a set of easy-to-use API, which utilizes the web service for application developer to access telecommunications functions more(More)
3rd Generation Partnership Project (3GPP) proposes relay architecture to extend the coverage and enhance the system capacity of Long Term Evolution Advanced (LTE-A). In the relay architecture, the header compression mechanism called RObust Header Compression (ROHC) is introduced to eliminate packet overhead and provide better spectral efficiency for IP(More)
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