(1987). Applied Probability and Queues. Journal of the Operational Research Society: Vol. 38, No. 11, pp. 1095-1096.

https://link.springer.com/content/pdf/10.1057%2Fjors.1987.184.pdf

Applied Probability and Queues

/pdf/reversibility-and-stochastic-networks-17kl9p5ino.pdf

Reversibility and Stochastic Networks

We study a sensor node with an energy harvesting source. The generated energy can be stored in a buffer. The sensor node periodically senses a random field and generates a packet. These packets are stored in a queue and transmitted using the energy available at that time. We obtain energy management policies that are throughput optimal, i.e., the data queue stays stable for the largest possible data rate. Next we obtain energy management policies which minimize the mean delay in the queue. We also compare performance of several easily implementable sub-optimal energy management policies. A greedy policy is identified which, in low SNR regime, is throughput optimal and also minimizes mean delay.

Optimal energy management policies for energy harvesting sensor nodes

By broadcasting messages about traffic status to vehicles wirelessly, a vehicular ad hoc network (VANET) can improve traffic safety and efficiency. To guarantee secure communication in VANETs, security and privacy issues must be addressed before their deployment. The conditional privacy-preserving authentication (CPPA) scheme is suitable for solving security and privacy-preserving problems in VANETs, because it supports both mutual authentication and privacy protection simultaneously. Many identity-based CPPA schemes for VANETs using bilinear pairings have been proposed over the last few years to enhance security or to improve performance. However, it is well known that the bilinear pairing operation is one of the most complex operations in modern cryptography. To achieve better performance and reduce computational complexity of information processing in VANET, the design of a CPPA scheme for the VANET environment that does not use bilinear paring becomes a challenge. To address this challenge, we propose a CPPA scheme for VANETs that does not use bilinear paring and we demonstrate that it could supports both the mutual authentication and the privacy protection simultaneously. Our proposed CPPA scheme retains most of the benefits obtained with the previously proposed CPPA schemes. Moreover, the proposed CPPA scheme yields a better performance in terms of computation cost and communication cost making it be suitable for use by the VANET safety-related applications.

An Efficient Identity-Based Conditional Privacy-Preserving Authentication Scheme for Vehicular Ad Hoc Networks

VANet security challenges and solutions: A survey

Techniques are described for selecting bearers for uplink data packet transmissions. For instance, bearers may be selected using communication device-side techniques. In one example, a bearer may be selected based on a determination that other bearer(s) are not configured to support uplink data packet transmissions. In another example, a bearer may be selected irrespective of traffic flow template rules set forth by network(s) to which a communication device is connected. In yet another example, a single, default bearer that is linked to a network access point may be selected for transmission of uplink data packets that are associated with traffic flow template rules corresponding to non-default bearers. In still another example, a bearer may be selected based on its quality-of-service class identifier (QCI) value if the QCI value indicates that the bearer is configured to support uplink data packet transmissions.

Selecting bearers for uplink packet transmissions

A network host device including a connection manager to communicate communication data with an external network over a plurality of bearers of the external network, an interface driver to provide an interface between the interface driver and the communication manager, the interface being dedicated to the external network, to receive processing data associated with the communication data over the interface, and to tag a packet of the processing data with identification information of the external network, and a traffic control unit to receive each packet of the processing data tagged with the identification information of the external network, and to select a bearer from among the plurality of hearers of the external network to communicate the communication data.

Method and Device to Control Communication with Multiple Networks Based on Respective Quality of Service Requirements

The inherent nature of the physical setup and transmission mechanism in wireless ad hoc networks with random channel access, results in correlation between the link metrics of adjacent links, when considering path optimization problems. We identify a special structure inherent to the solution of Dynamic Programming (DP) problem arising in such an optimization over paths. According to this structure, the optimal policy tries to equalize the link metrics of adjacent links in a multi-hop route. We validate this structural property with simulations.

/pdf/a-structural-property-of-solutions-to-path-optimization-1ndu9tl6w4.pdf

A Structural Property of Solutions to Path Optimization Problems in Random Access Networks

We address the problem of achieving a target end-to-end per-packet delay jitter for an uplink packet traffic from a mobile device to a central server. We provide simple analytical models for predicting the delay jitter and their empirical validation. The structural dependency of the end-to-end per-packet delay jitter on various Constant Bit Rate (CBR) traffic parameters, namely, burst length and inter-burst time, are then utilized to develop a stochastic approximation algorithm to adapt these parameters to achieve a target end-to-end delay jitter. Initial understanding is simulation-based using Network Simulator (NS3). Further, our model is evaluated against the experimental results obtained on a reported real-world implementation.

End-to-End Delay Jitter in LTE Uplink: Simple Models, Empirical Validation & Applications

Example embodiments generally relate to adapting a transmission via first wireless technology to avoid interference with a reception via a second wireless technology. For example, a user equipment (e.g. cell phone) can include radios operating according to first and second wireless radio technologies, which can include Long Term Evolution (LTE) and a technology using the industrial, scientific and medical (ISM) frequency band. When a priority request is asserted by a radio operating in the ISM frequency band, the LTE radio may abort a scheduled transmission when certain “transmission abort criteria” are satisfied.

Arzad A. Kherani

Papers

Selecting bearers for uplink packet transmissions

Method and Device to Control Communication with Multiple Networks Based on Respective Quality of Service Requirements

A Structural Property of Solutions to Path Optimization Problems in Random Access Networks

End-to-End Delay Jitter in LTE Uplink: Simple Models, Empirical Validation & Applications

System and method for transmission adaption to avoid reception interference in a device that implmenents more than one wireless technology