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The co-channel interference becomes the main influence factor in the cellular network with the universal frequency reuse. In this paper, we investigate the downlink resource allocation for a cellular network with two-hop cooperative relay, considering the influence of the co-channel interference. We firstly study a randomized transmission scheme, where the transmitter in each cell sends data according...
Lists intersection is an important operation in modern web search engines. Many prior studies have focused on the single-core or multi-core CPU platform or many-core GPU. In this paper, we propose a CPU-GPU cooperative model that can integrate the computing power of CPU and GPU to perform lists intersection more efficiently. In the so-called synchronous mode, queries are grouped into batches and processed...
Intersection of inverted lists is a frequently used operation in search engine systems. Efficient CPU and GPU intersection algorithms for large problem size are well studied. We propose an efficient GPU algorithm for high performance intersection of inverted index lists on CUDA platform. This algorithm feeds queries to GPU in batches, thus can take full advantage of GPU processor cores even if problem...
In current multi-channel live P2P video systems, there are several fundamental performance problems including exceedingly-large channel switching delays, long playback lags, and poor performance for less popular channels. These performance problems primarily stem from two intrinsic characteristics of multi-channel P2P video systems: channel churn and channel- resource imbalance. In this paper, we...
The standardization of resource catalog and coding for e-learning applications is an effective way to manage, search, interchange and reuse e-learning resources. An effective coding strategy provides a high quality service for e-learning resource users. In this paper, we study this catalog resource coding problem. We first provide the background of our research, and then review some existing catalog...
In DHT-based P2P systems, the technique of "virtual server" is widely used to achieve load balance. To efficiently handle the workload skewness , "virtual servers" are allowed to migrate between nodes. Among existing migration-based load balancing strategies, there are two main categories: (I) rendezvous directory strategy (RDS) and (2) independent searching strategy (ISS). However,...
As a fundamental problem in DHT-based P2P systems, load balancing is important to avoid performance degradation and guarantee system fairness. In this paper, to get a better understanding about the effectiveness of migration-based load balancing approaches in DHT systems, we analytically study two representative migration-based load balancing strategies: rendezvous directory strategy (RDS) and independent...
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