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Multiple-In-Multiple-Out (MIMO) o‚ffers great potential for increasing network capacity by exploiting spatial diversity with multiple antennas. Multiuser MIMO (MU-MIMO) further enables Access Points (APs) with multiple antennas to transmit multiple data streams concurrently to several clients. However, the uplink data transmission (from client to AP) of MU-MIMO is more vulnerable because its wide...
In this paper, an adaptive cooperation scheme is presented for bidirectional communication between two nodes, where the non-relay direct transmission and the one- or two-way relaying diversity transmission are jointly considered. The results show that the proposed scheme obtains lower outage probability than the conventional bidirectional communication methods.
In this paper, we investigate the capacity of ad hoc wireless networks with directional antennas and multi-packet reception (MPR), which is referred to as DMPR wireless networks hereinafter. MPR has been proven to be an effective technology to improve the capacity by increasing the number of concurrent transmission, however the capacity of MPR networks is constrained by interference. The directional...
Today's best-effort Internet with "one fits all" principle comes to an impasse. Addressed to different QoS requirements of today's network services, we propose a QoS oriented Network Architecture that bases on network virtualization. It provides multiple virtual networks deploying on the same substrate, each is designed with a special designing goal and is running a customized protocol....
Interphone is used to dispatch vehicle in flight service at many airports in China. Former service manners have the advantages of low speed, poor real time ability, etc., which make the manager can not acquire every vehicle's working state in time. Therefore, a powerful flight service vehicle dispatching management system becomes necessary. Firstly, the wireless local area networks (WLAN) around the...
Perviously, we studied RTT measurement method in mobile multi-homed end-to-end transport. End-to-end delay is a primary concern for real-time applications and asymmetric-path selection has some special characteristic to symmetric-path. Based on this, we propose an algorithm called Minimum RTT Asymmetric-Path First (MRAPF) for end-to-end transport path selection that takes into account the dynamic...
P2P systems have high scalability, robustness and fault tolerance because of its no centralized server and the network self-organized itself As the standard protocol for VoIP and NGN, SIP is a general protocol for establishing and controlling multimedia session. In this paper, we proposed a real-time streaming media sharing mechanism based on P2P and SIP, which uses Chord as the underlying distributed...
The expansibility of network management became a popular problem in network management research. To meet this challenge, we propose to apply the design pattern to make the management system more expandable and easy to realize. According function requirements of VOD network management system, this paper presents a particular management framework that supports multi-protocols for VOD NM system, and...
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