Transmission power control in wireless ad hoc networks: challenges, solutions and open issues.
ABSTRACT This article presents information about transmission power control in Wireless adhoc networks This article presents information about transmission power control in Wireless adhoc networks. Mobile adhoc networks (MANETS) have recently been the topic of extensive research. The interest in such networks stems from their ability to provide temporary and instant wireless networking solutions in situations where cellular infrastructures are lacking and are expensive or infeasible to deploy. Due to their inherently distributed nature, MANETs are more robust than their cellular counterparts against single-point failures and have the flexibility to reroute around congested nodes. Furthermore, MANET5 can conserve battery energy by delivering a packet over a multihop path that consists of short hopby-hop links. While wide-scale deployment of MANET5 is yet to be realized, several efforts are currently underway to standardize protocols for the operation and management of such networks. The adhoc mode of the IEEE 802.11 standard is, by far, the most dominant MAC protocol for ad hoc networks. This protocol generally follows the CSMA/CA paradigm, with extensions to allow for the exchange of RTS/CTS handshake packets between the transmitter and the receiver.
- SourceAvailable from: csl.mtu.edu01/1999;
Conference Proceeding: Power controlled dual channel (PCDC) medium access protocol for wireless ad hoc networks[show abstract] [hide abstract]
ABSTRACT: In this paper, we propose a comprehensive solution for power control in mobile ad hoc networks (MANETs). Our solution emphasizes the interplay between the MAC and network layers, whereby the MAC layer indirectly influences the selection of the next-hop by properly adjusting the power of route request packets. This is done while maintaining network connectivity. Directional and channel-gain information obtained mainly from overheard RTS and CTS packets is used to dynamically construct the network topology. By properly estimating the required transmission power for data packets, our protocol allows for interference-limited simultaneous transmissions to take place in the neighborhood of a receiving node. Simulation results indicate that compared to the IEEE 802.11 approach, the proposed protocol achieves a significant increase in the channel utilization and end-to-end network throughput, and a significant decrease in the total energy consumption.INFOCOM 2003. Twenty-Second Annual Joint Conference of the IEEE Computer and Communications. IEEE Societies; 01/2003
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ABSTRACT: This paper addresses the problem of power control in ad hoc networks supporting multicast traffic. First, we present a distributed algorithm which, given the set of multicast transmitters and their corresponding receivers, provides an optimal solution to the power control problem, if there is any. The transmit power levels obtained by solving the optimization problem minimize the network power expenditure while meeting the requirements on the SINR at the receivers. Whenever no optimal solution can be found for the given set of multicast transmitters, we introduce a joint scheduling and power control algorithm, which eliminates the strong interferers thus allowing the other transmitters to solve the power control problem. The algorithm can be implemented in a distributed manner; however, it provides a suboptimal solution since it is based on `local' information. Simulation results show that the obtained solution is close to the global optimum, when it exists. When there is not an optimal solution, the proposed algorithm enables us to maximize the number of successful multicast transmissions.06/2003;