The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper constructed signal models of four types of signal in wireless communication, i.e. single user MIMO signal, single user single antenna signal, virtual MIMO signal and multibeam smart antenna signal first, and then proposed a method for blind identification of single user MIMO signal in step by step in noncooperation communication, when the unknown source was one of the four types by using...
A Personal Network (PN) is a network of distributed personal devices that communicate with each other independently from their geographical location. By adding extra functionality to PNs it is possible to enable cooperation between PNs forming a group-oriented network called Fednet. A Fednet is a secure, opportunity or purpose driven ad-hoc sharing of personal resources. In this paper, we provide...
This paper considers two nodes (base station (BS), access gateway (AG)) mobile network architecture based on a all IP infrastructure. We propose to use a multicast tree from an AG to some BS on which mobility could be predicted. The problem is well defined and the complexity proof and reduction are well discussed. We focus on a distributed process to control multicast functionalities in each IP router...
TCP-Friendly Rate control (TFRC) is a Loss based rate control mechanism. It uses TCP equation throughput for calculating the sending rate. This equation is a function of loss event rate. TFRC assumes any lost packet as a signal of network congestion and correspondingly reduces its transmission rate. But in wireless links the packet may be lost by handoffs and error prone wireless links. So there should...
The hidden receiver problem is the primary concern in mobile ad hoc networks (MANET), due to the high rates of neglecting the state of the hidden terminal; the potential sender (neighbors of the hidden terminal) enters into an unnecessary backoff process and retransmission circle, therefore leading to serious unfairness between contention terminals. Hidden receiver problem increases the probability...
The future vision of the wireless networks is coexistence of current existing access networks. The different access networks managed by different operators will be bound together into a single network and the Internet Protocol will be the glue. To fulfill this vision, one of the most challenging parts is to facilitate the authentication phase of the handovers between domains. PANA pre-authentication...
End-to-end delay and loss probability are two important parameters for evaluating the performance of multihop ad hoc networks. One of the main reasons for increasing the value of those parameters; is the buffer management scheme in the intermediate nodes. The number of hops that the packet traversed is not taken into account in most existing buffer management schemes. Dropping a packet which traversed...
In this paper, we investigate wireless communications over multi-radio and multi-channel wireless mesh networks with IEEE 802.11e based ingress access points for local clients. We develop a theoretical model for stochastic performance analysis for real-time applications over such wireless mesh networks with wideband fading channels in various environments.
The 3G LTE will provide the increased data rates, improved coverage, improved spectrum efficiency and reduced latency with adapting various transmission parameters for high-speed data transmission. Accordingly, we suggest an efficient method for controlling FPGAs in the user equipment of the 3G LTE. Our proposed DSP software design, the UE Modem Controller, reduces processing latency for controlling...
The basic DiffServ model lacks the mechanism to prevent itself from being overload; it does not have any capability to inform the edge nodes about the internal traffic load in the network. Thus, injecting more QoS sensitive traffic into the network will not only degrade the performance of the current flow but it will also degrade the performance of already established flows. In this research paper...
In today's society digital services have become the key to the success of anyone. Hence, for being competitive it is important that these services are available, employ the latest technology and are low cost. Unfortunately, it often happens that these good intentions do not correspond to reality. In this paper an information system is proposed, targeted at those small realities affected by the digital...
Several solutions have been proposed to couple QoS with mobility management in a way that can satisfy the real-time requirements. The most of these solutions depend on RSVP which suffers from many drawbacks. "Next Step In Signaling" protocol suite (NSIS) presents a new promised framework that can be used to signal for different QoS models and cover the drawbacks of RSVP. This paper proposes...
This paper addresses mobile service provisioning in a mobile supported sensor network. The challenges of secure service provisioning in such a network is tackled through a two-layer approach, using the encryption on the radio layer and policies for device capabilities and service access. This paper suggests the mobile phone acting as control centre for the sensors. The implementation is based on a...
First, this paper describes a prediction of Rice factor (K factor) estimation for a high altitude platforms (HAPs) wireless channel. Estimation is based on experimental data which was collected from an object floating above the ground and carrying transmitter apparatus to perform as a HAPs. This experiment is intended to study multipath channel behaviour represented by K value for a wireless communication...
Many of applications in vehicular ad hoc networks (VANET) are based on dissemination of information, so broadcasting is a fundamental service in these networks. Broadcasting is a difficult task since vehicular networks often lack continuous end-to-end connectivity and have large variations in node densities. In this paper we present a method that improves the reception rates of broadcast messages...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.