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.
In underwater acoustic networks, a transmission is done by means of acoustic wave. However, acoustic transmissions suffer long propagation delay and high bit error rate, especially for real time applications. Since speed of sound and underwater noises are varied with water depth, therefore, this paper takes sound speed and underwater noises into account and proposes a channel-aware depth-adaptive...
Due to the nature of water, sound wave is used for underwater transmission instead of radio wave. Long propagation time and a variant attenuation model are two major concerns in MAC protocol design for underwater transmission. Although IEEE 802.11 DCF is the most famous MAC protocol, it does not work well in underwater environments. Therefore, according to the acoustic attenuation model, Control/DATA...
For coverage extension and throughput enhancement, the IEEE 802.16j task group has developed a novel multi-hop relay network architecture to enable typical IEEE 802.16 networks to achieve data transmission between base stations and mobile stations via a multi-hop path with relay stations deployment. How to determine an effective path for throughput gain and overhead reduction is emerging and crucial...
Underwater acoustic sensor networks (UASNs) have attracted significant interest and been developed for a wide range of applications. Using acoustic signal for transmitting in underwater leads the effects on long propagation delay, low bandwidth, and low data rate. These characteristics result the high end-to-end delay from the sensor to a sink. In this paper, an important property of acoustic signal...
In underwater acoustic sensor networks, sensors are usually deployed for sensing task, and the sensed data is able to be transmitted in a direct or multi-hop relaying manner to the sink in a single-hop topology. Considering the energy consumption model, the signal transmitted in a longer range will cost much energy than that in a shorter range. Therefore, three transmission types, sink-to-nodes, node-to-node,...
In the IEEE 802.16j multi-hop relay (MR) network, the design of an effective path selection scheme is an important issue for throughput gain and overhead reduction. This paper proposes a new metric, called SEL, to evaluate the possible relay paths and thereby determine the appropriate one among these paths. SEL mainly considers both link spectral efficiency and link load, and based on SEL, a comprising...
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.