The successful operation of the present Internet depends mainly upon TCP/IP which employs end-to-end congestion control mechanisms built in the end hosts. In order to further enhance this paradigm of end-to-end control the Random Early Detection algorithm has been proposed, which starts to mark or drop packets at the onset of congestion. The paper addresses issues related to the choice of queue...

In this letter, a uniform linear array (ULA) is proposed for line-of-sight massive multiple-input-multiple-output (MIMO). It assumed that the number of antennas fixed. For given ULA with an arbitrary inter-element spacing, probability correlation among channel vectors two users being above threshold value derived. The spacing one which aforementioned minimized. To show effectiveness ULA, simula...

This paper is concerned with the influences of enlarging or shrinking the soft handoff coverage on the new-call blocking and the handoff-call dropping probabilities in a cellular CDMA system. In the proposed analytic model, we assume a cell is in hexagonal shape with two parameters, a and b, representing the soft handoff region between the outer and the inner cell. In the traffic model, we assu...

Community wireless mesh networks are vulnerable to free riders who refuse to forward data for others. As the naive selfish strategy of dropping data is readily detected, free-riders are motivated to subtly manipulate the routing protocols to minimize their workload while still evading detection. This paper presents an adaptive on-line algorithm to detect such selfish behavior based solely on lo...

A malicious insider in a sensor network may sabotage the network at any level of operation. While most prior work on network-layer security has focused on providing control plane integrity (specifically, routing correctness), we approach a complementary and equally important problem: data plane reliability. In a data plane attack, the attacker does not attack the routing control logic, but inst...

Call dropping is considered more annoying than call blocking in wireless cellular networks. The cost of the classical method of employing guard channels to decrease the call dropping rate is the increase in call blocking rate. Since subscriber mobility changes in time, the number of handoff attempts in each cell is subject to fluctuations, making static assignments (or periodical update) of a g...

This article proposes an integrated framework for adaptive QoS provision in IEEE 802.16e broadband wireless access networks based on cross-layer design. On one hand, an efficient admission control (AC) algorithm is proposed along with a semi-reservation scheme to guarantee the connection-level QoS. First, to guarantee the service continuity for handoff connections and resource efficiency, our s...

The queue length and the load rate should be monitored to overcome problem of router congestion due increase in network utilization achieve a high-speed transmission. Previous active management methods manage queued packets buffer maintain high performance. However, these depend on monitoring indicators that do not cover all signs, leading packet loss delay. Accordingly, signs wrapped into mana...