Minimum Required Transmission Power Research Articles

Integrating D2D network with IoHT : toward minimum power allocation

One of the important technologies of the 5G is the device to device (D2D) network, where mobile device will communication together either over direct transmission or over multihop transmission without need for the base-station. And it is quite possible that D2D users overlap with human body network. For this reason, we proposed an internet of health things (IoHT) design that make cooperation possible between D2D users and human body sensors. Because we can consider the energy as the rarest provider in the Wireless Body Area Network (WBAN). Finding optimal and minimum required transmission power that can achieve a certain level of utility while utilizing as little power for transmission as possible plays an important role in reducing energy consumption. In this paper, we found the required transmission power of four transmission modes: the direct transmission mode, the dual-hop transmission mode, and two incremental cooperative transmission modes with Rayleigh channel fading in proposed IoHT design. In addition, we propose a power-efficient algorithm that we have termed efficient-power transmission mode selection-based (EPTMS) algorithm. The proposed algorithm is select appropriate transmission mode that it provides a minimum required transmission power which ensures a certain transmission rate. The numerical and simulation results exhibit that, when compared with the two master node cooperative protocol (TMNCP), EPTMS can improve network performance under general circumstances.

Minimum Power Allocation Cooperative Communication based on Health-Care WBAN

Energy is limited resource in the Wireless Body Area Network (WBAN). Finding optimal and minimum required transmission power that can achieve a certain level of utility while utilizing as little power for transmission as possible plays an important role in reducing energy consumption. In this paper, we found the required transmission power of four transmission modes: the direct transmission mode, the dual-hop transmission mode, and two incremental cooperative transmission modes with Rayleigh channel fading.

Spread spectrum-based coordination design for spectrum-agile wireless ad hoc networks

Cognitive radios (CRs) have been proposed to improve spectrum utilization by enabling opportunistic and dynamic spectrum access for unlicensed users. To enable efficient CR communications, a reliable control channel (CC) for exchanging control information is needed. In this paper, a direct sequence spread spectrum (DSSS)-based underlay CC design for distributed coordination in CR networks (CRNs) is proposed. The proposed design provides immunity to licensed primary radio (PR) interference (reliable communication), low transmission power (PR users’ protection) and predefined-required transmission rate and range (network connectivity). The Proposed design ensures that both narrow-band data and wide-band control transmissions can be simultaneously proceeded while protecting the performance of PR users. To ensure reliable CR control communications, a closed-form expression is derived for the minimum required transmission power for control packet transmissions such that required transmission range and rate are achieved. Based on the derived expression, the maximum allowable transmission power for CR data transmissions is computed such that an enforced power mask constrain over the PR channels is not violated. Simulation results indicate that the proposed CC design enables efficient CR communications without relying on the existence of a dedicated CC.

A SINR-Based MAC Protocol for Wireless Ad Hoc Networks

In this paper, we propose a power control MAC protocol that improves the spatial reuse of wireless channels and the energy efficiency for the wireless nodes. The main idea is to adopt IEEE 802.11 Power Saving Mechanism (PSM) with the appropriate power control scheme for the wireless ad hoc networks. All control messages containing the transmission power information are transmitted at the maximum transmission power in the Announcement Traffic Indication Message (ATIM) window while the data packets are sent at the minimum required transmission power during the data window. Based on the sensing power or the transmission power information of the control messages, a neighbor node checks whether it can transmit simultaneously. Simulation results show the advantages of the proposed protocol in terms of the aggregate throughput, average delay, energy efficiency and fairness index.