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In this paper, we have designed DOTP (distance of two points) algorithm and some data structure to calculate the shortest distance between the two vertices in Euclidean network. We created a function which had a linear relation with vertices n and edges e in time complexity. This algorithm's time complexity majority related with non-tree edges t which defined in chapter 2 and has a small magnitude...
Resource discovery is a key component of P2P network. The resource discovery algorithm complexities of classic models, such as Chord and Pastry, are always equal or even bigger than O(logN), which means while the network scale increasing, the time delay will also increase rapidly without a ceiling. In this paper, we present a new P2P network model for resource discovery. Firstly, we take location-aware...
In this paper, a novel dynamic spectrum sharing scheme combining spectrum adaptation and OFDM for cognitive radio system is proposed. Given spectrum sensing and channel estimation information by the receiver, an improved model due to transmit power thresholds for SA-OFDM system is adopted to achieve spectrum adaptation for unlicensed users. In order to improve spectrum efficiency and reduce computational...
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