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The performance of router directly impacts the Network-on-Chip (NoC) performance. This paper focus on developing efficient microarchitecture of allocator in the router and proposed matrix-diagonal allocator with high matching quality and low packets latency. The allocator, taking advantage of the fact that each element in the diagonal doesn't share the same row or column, includes matrix-diagonal...
Due to asynchronous packet transmissions and rate mismatch among different coding flows in existing opportunistic network coding architectures, such as COPE, the amount of packets which can be coded together may be insufficient and thus the performance gain of network coding cannot be fully exploited. One feasible solution for this problem is to make coding nodepurposely delay some packet transmissions...
Device-to-Device (D2D) communications can increase the throughput of cellular networks significantly, where the interference among D2D links should be properly managed. In this paper, we propose an opportunistic cooperative D2D transmission strategy by exploiting the caching capability at the users to deal with the interference among D2D links. To increase the cooperative opportunity and improve spatial...
Pushing files to users based on predicting the personal interest of each user may provide higher throughput gain than broadcasting popular files to users based on their common interests. However, the energy consumed at base station for pushing files individually to each user is also higher than broadcast. In this paper, we propose an energy-saving transmission strategy for pre- downloading the files...
Device-to-device (D2D) communications have recently been considered as promising means to enhance resource utilization of cellular network. In this paper, we investigate joint channel assignment and power allocation to maximize utility of cellular users as well as throughput of every D2D pair, while guaranteeing minimal transmission rate of cellular users from a Nash bargaining theory point of view,...
In this paper, we propose a new MAC protocol for multi-beam directional antenna. In the protocol, each beam-sector has its own control channel, thus the communications among different beam-sectors are independent. It uses the Directional Network Allocation Vector (DNAV) to record the establishment processes. After sensing all the sectors of multi-beam antenna, it uses the global assignment strategy...
In recent years, femtocells, which could enhance the indoor coverage, have attracted widely attention. The interference among femtocells is not ignorable when the deployment is extremely dense. In this paper, a novel component carrier selection scheme, which includes two algorithms, i.e. BCCS (Basic Component Carrier Selection) algorithm and ECCS (Enhance Component Carrier Selection) algorithm, is...
Coordinated multi-point (CoMP) transmission can significantly improve the spectral efficiency of cellular networks. To reduce the training overhead and the complexity for implementing CoMP, an effective way is to divide base stations (BSs) into cooperative clusters. However, with disjointed clusters, the cluster-edge users suffer from inter-cluster interference. In this paper, a scheme is designed...
In this paper, we proposed a coherent detecting and mapping scheme for the relay node in two-way relay channels (TWRC) with binary frequency-shift keying (2FSK) modulated physical-layer network coding (PNC). The scheme use two branches to process the superimposed signal, sample and make decision to the difference of the output signal from the two branches, and then, map the decision result to network...
Deduplication has become one of the hottest topics in the field of data storage. Quite a few methods towards reducing disk I/O caused by deduplication have been proposed. Some methods also have been studied to accelerate computational sub-tasks in deduplication. However, the order of computational sub-tasks can affect overall deduplication throughput significantly, because computational sub-tasks...
As XML is playing a crucial role in web services, databases, and document processing, efficient processing of XML queries has become an important issue. On the other hand, due to the increasing number of users, high throughput of XML queries is also required to execute tens of thousands of queries in a short time. Given the great success of GPGPU (General-Purpose computations on the Graphics Processors),...
Nowadays, data reliability and availability are big challenges that the designers of large data centers have to face. Remote mirroring technology is an effective approach for data protection. It maintains a complete copy of primary site at geographically distant locations. Data consistency is the key point of the replication process in the remote mirroring system. This paper improves the consistency...
In this paper, we propose a novel cross-layer framework, which includes a two-level resource management to efficiently allocate subchannels among cell BSs (at the super-frame level) and do resource scheduling (at frame level) among intra-cell users based on channel condition and QoS requirement, and a system-level call admission control. The coordination among a plurality of BSs in the OFDMA-based...
In this paper we present an improved NSGA-II algorithm which is suitable for workload control by using search optimization technique. Using this improved NSGA-II algorithm, we can find quickly a set of workloads with maximum commercial value and minimum average response time as the submission object in a time interval. This algorithm can effectively control various complex workloads and improve the...
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