Patent
Method of establishing uplink in mobile satellite communication system
TLDR
In this paper, a method of establishing an uplink in a mobile satellite communication system is presented. But the method is limited to the case where each of the terminals is included in a coverage of a satellite beam.Abstract:
Provided is a method of establishing an uplink in a mobile satellite communication system, the method including: receiving a random uplink access signal from terminals included in a coverage of a satellite beam; estimating a location of each of the terminals; calculating an uplink transmission point in time when each of the terminals transmits an uplink signal, based on the estimated location of each of the terminals; transmitting, to each of the terminals, the calculated uplink transmission point in time; and receiving the uplink signal from each of the terminals at the calculated uplink transmission point in time.read more
Citations
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Patent
Methods for power control and link adapation in lte-based mobile communication system
TL;DR: In this article, the authors proposed a power control and link adaptation method for compensating for a long round trip delay time and slow channel fading in a long term evolution (LTE)-based mobile communication system, similar to a satellite mobile system, in which a distance between a base station and a terminal is relatively long.
Patent
Method and apparatus for mitigating satellite downlink interference of satellite and terrestrial integrated system
TL;DR: In this article, a method in which a satellite or a terrestrial earth station that is included in a satellite communication system that shares a frequency resource with a terrestrial communication system allocates a frequency resources is provided.
Patent
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Tae Chul Hong,Hee Wook Kim +1 more
TL;DR: In this article, a system and method for wireless communication that schedules a connection time of a terminal based on a delay time is provided, where a base station of a wireless communication may include a delay-time determiner, based on preamble information for a plurality of terminal groups based on location information of the terminal, and a scheduler to schedule the connection time for the terminal to connect to the base station using the delay time.
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Mobile cummunication terminal and synchronization method of the same
TL;DR: In this article, a mobile communication terminal for performing synchronization with a base station in mobile communication system, and a synchronization method thereof, is presented, which comprises the processes of: receiving a downlink signal from a BS, calculating a distance to the BS from the received DL signal, and adjusting a transmission point of an uplink signal according to the distance to BS.
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Interference reduction from terrestrial base station transmission to fixed satellite service
TL;DR: In this paper, the first C-band resources used for a fixed satellite service (FSS) and the second Cband resources for a terrestrial broadband wireless access (BWA) network based on both channel state information associated with the terrestrial BWA network and the first c-band resource used for the FSS were determined.
References
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Patent
Method, apparatus and system for synchronizing a cellular communication system to GPS time
Jari Syrjärinne,Harri Valio +1 more
TL;DR: In this paper, a ranging receiver (10) including a cellular module (11), for providing time according to a positioning system to enable synchronizing a wireless system to the positioning system is presented.
Patent
Systems and methods for orthogonal frequency division multiple access (ofdma) communications over satellite links
TL;DR: In this article, the authors proposed methods for controlling orthogonal frequency division multiple access (OFDMA) communications over satellite links by estimating a differential delay (x ms) between a satellite spotbeam between a mean propagation delay (250 ms) in the spotbeam and a propagation delay ((250-x)ms) between the user terminal in the satellite and a satellite, and estimating an overlap (215) between an OFDMA uplink frame and a downlink frame as a result of the differential delay.
Patent
Method and arrangement for base station location, base station synchronization, and mobile station location
TL;DR: A complete positioning solution for mobile communications networks such as WLAN or ad-hoc/multi-hop networks, which lack location information for one or more base stations is proposed in this paper.
Patent
Apparatus and method for fast access in a wireless communication system
TL;DR: In this article, a system and methodologies that facilitate a fast access in a wireless communication system, such as OFDMA, are described, where the system and methods are described for generating an access probe comprising an access signature having quality of service information and transmitting the access probe on a random access channel.
Patent
A timing adaptaion method for USTS in asynchronous IMT-2000 system
TL;DR: In this paper, a method of applying timing for an uplink synchronous transmission scheme in a mobile communication system of next generation is provided to reduce an overhead according to a measuring process of a delay time in a base station and improve a transmission rate of TAB information.