In this paper, two algorithms in resource allocation with fractional power control scheme are proposed and evaluated. In these algorithms, we joint chunk allocation and unequal power allocation in one chunk by considering fractional power control scheme as power constraint on each user to improve the sum of spectral efficiency of users and fairness among users. In order to evaluate our proposed algorithms, we compare the performances of our proposed algorithms with those of the previous algorithms with fractional power control scheme as power constraint in each user. From the simulation results are shown that our proposed algorithms can improve the sum of spectral efficiency and fairness among users in macrocell urban and suburban condition.
The routing protocol is able to improve the performance of the network as compared to the traditional 3G and WiFi offload. On this study, the concept Genetic Zone Routing Protocol (GZRP) will be combined with the VHO algortihm used at the multiple base stations in 3G-WiFi offload network. Based on the results of this simulation the proposed algorithm can improve troughput and reduce handover delay. In terms of handover time, there is a significant improvement when the combined algorithm is employed as compared to the VHO algorithm alone, which shows a decrease of 2.757 seconds for the average handover time from 3G to WiFi and 3.824 seconds for the average handover time from WiFi to 3G.
Keywords -load balancing: mobile ad-hoc network; 3G -WiFi offload; AOMDV; VHOI.
Digital Dividend is the spectrum available from the release of very precious spectrum when full migration of analog terrestrial television transmission towards digital terrestrial television transmission has been fully undertaken. What makes Digital Dividend is extremely important is that the fact the spectrum located in lower UHF band below 1 GHz. Therefore, it is optimum in terms of the need of coverage and bandwidth. The main potential services in Digital Dividend are mobile broadband and digital terrestrial broadcasting. The objective of this study is to find out the minimum guard band and minimum distance between mobile broadband and digital terrestrial broadcasting. The interference analysis has been undertaken using SEAMCAT (Spectrum Engineering Advanced Monte-Carlo Analysis Tool) software. Several scenarios between DVB-T and E-UTRA, such as co-channel and adjacent-channel interferences, variation of distance between DVB-T and E-UTRA devices, and different directions of link have been studied. The results obtained provide some figure regarding the minimum guard-band required and minimum distance between DVB-T and E-UTRA systems.
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