Topic
Base station
About: Base station is a research topic. Over the lifetime, 85883 publications have been published within this topic receiving 1019303 citations. The topic is also known as: Mobile phone base stations & BS.
Papers published on a yearly basis
Papers
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TL;DR: Existing data dissemination protocols supporting mobile sinks are summarized and sink mobility is analyzed, as well as its impact on energy consumption and the network lifetime.
Abstract: A wireless sensor network is a multihop wireless network consisting of spatially distributed autonomous sensors with sensing, computation, and wireless communication capabilities. Generally, each sensor has the task to monitor and measure ambient conditions and disseminate the collected data toward a base station, or sink, for data post-analysis and processing. Many data dissemination protocols have been proposed to allow the dissemination of the collected data toward a static sink. Recently, mobile sinks were shown to be more energy-effective than static ones. In this article, existing data dissemination protocols supporting mobile sinks are summarized. In addition, sink mobility is analyzed, as well as its impact on energy consumption and the network lifetime.
221 citations
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22 Dec 2000TL;DR: In this article, the authors proposed a receiver for a CDMA communications system which employs interference subspace rejection to tune a substantially null response to interference components from selected signals of other user stations.
Abstract: A receiver of the present invention addresses the need for improved interference suppression without the number of transmissions by the power control system being increased, and, to this end, provides a receiver for a CDMA communications system which employs interference subspace rejection to tune a substantially null response to interference components from selected signals of other user stations. Preferably, the receiver also tunes a substantially unity response for a propagation channel via which a corresponding user's signal was received. The receiver may be used in a base station or in a user/mobile station.
220 citations
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14 Nov 1994
TL;DR: In this article, a channel hopping scheme is used based upon avoidance of AMPS channel use to maintain the integrity of CDPD transmission, and a distinctive protocol is used to encapsulate control/query/response data for transmission throughout the CDPD system.
Abstract: A cellular digital packet data (CDPD) system includes a mobile data base station (MDBS) configured to interface easily with an advanced mobile phone system (AMPS). The elements of the MDBS are arranged on modules and the functionality of the MDBS is divided among the modules to facilitate flexibility, compactness and quick expansion of the MDBS. To further facilitate compactness, the MDBS includes a transceiver/modem board which uses a single chip to carry out delta-sigma modulation. In order to maintain the integrity of CDPD transmission, a channel hopping scheme is used based upon avoidance of AMPS channel use. A distinctive protocol is used to encapsulate control/query/response data for transmission throughout the CDPD system. This protocol also facilitates easy control of each MDBS throughout the system.
220 citations
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27 Apr 2010TL;DR: In this paper, a multi-hop MIMO repeater is configured to translate normal wireless mobile bands into other frequency bands in the physical layer, which can deliver high data rate over larger distances, e.g., further away from cell base stations.
Abstract: In one or more embodiments taught herein, a multi-band MIMO repeater is configured to translate normal wireless mobile bands into other frequency bands in the physical layer. An advantageous, multi-hop repeater chain includes two or more such repeaters, for propagating downlink signals from a base station, and for propagating uplink signals to the base station. Each such repeater may use paralleled homodyne structure transceivers for better SNR, spectrum combiners for uplink signal aggregation, spectrum separators for downlink signal de-aggregation, water mark signal inserters for optimization, and, among other things, spectrum analyzers for frequency band selection. In at least one such embodiment, a multi-hop repeater chain is configured for MIMO operation in an LTE Advanced or other MIMO network, to deliver high data rate over larger distances — e.g., further away from cell base stations.
220 citations
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01 May 1998TL;DR: In this paper, the authors propose a MAC message consisting of a control frame structure which comprises scheduling parameters including MAC IDs fields, activity fields and a field representing the number of free traffic channels in a cell.
Abstract: In a packet data transmission and reception system a media access control (MAC) message is broadcast by a base station to a plurality of mobile stations. The MAC message contains packet data transmission scheduling information which allows the base station to preemptively control mobile station access to traffic channels in order to maximize the efficiency of packet data transmissions and allow scheduling consideration including priority access, quality of service and maximum bytes per transfer. The MAC message consists of a control frame structure which comprises scheduling parameters including MAC IDs fields, activity fields, and a field representing the number of free traffic channels in a cell. These parameters enable multiple mobile stations to share, in a time multiplexed fashion, traffic channels for packet data transmission on CDMA based mobile communication systems.
220 citations