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Patent

Method and apparatus for multi-user scheduling for interference avoidance in adaptive beamforming systems

Hafedh Trigui, +3 more
TLDR
In this article, a method and apparatus for imparting coverage gain to cell-edge or cusp mobile subscribers without resort to diluted frequency reuse factors is disclosed, which may be applicable to fixed multibeam systems as well as individual steered beam and spatial null generation antenna systems.
Abstract: 
A method and apparatus of imparting coverage gain to cell-edge or cusp mobile subscribers without resort to diluted frequency reuse factors is disclosed. Each base station adopts a priori a beam illumination sequence designed to minimize or obviate the likelihood of beam clashes in a narrow beam adaptive beamforming system. Such sequences may be optimized to impact primarily cell-edge subscribers or subscribers within cusp areas of adjoining beams or sectors. The inventive protocols may be applicable to fixed multibeam systems as well as individual steered beam and spatial null generation antenna systems.

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Citations
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Patent

System and method of base station performance enhancement using coordinated antenna array

Yan Hui
TL;DR: In this article, a smart antenna technique is used in a coordinated way among a group of BTSs, such as Femtocells, to avoid or reduce interference or manage how interference happens to achieve performance enhancement such as higher system throughput or better QoS to individual applications.
Patent

Apparatus and method for scheduling using beam scanning in beamformed wireless communication system

Ji-Yun Seol, +4 more
TL;DR: In this article, an apparatus and a method for beam selection and inter-beam scheduling using beam scanning in a beam-formed wireless communication system are provided, where a reference signal is transmitted through at least one transmission beam, and the receiving channel information is provided from a receiving stage.
Patent

Time division duplexing (tdd) configuration for access point base stations

Tingfang Ji, +2 more
Abstract: Systems and methodologies are described that facilitate establishing synchronization and/or mitigating interference with a time division duplexing (TDD) access point base station in a wireless communication environment. For example, a TDD configuration can be selected for the access point base station based upon received information to control interference. By way of another example, the access point base station can be synchronized with a disparate base station based upon the received information. Moreover, the received information can relate to the disparate base station, a served user equipment (UE) (e.g., served by the access point base station, . . . ), and/or a non-served UE (e.g., served by a base station other than the access point base station, . . . ). For example, the served UE can transmit a measurement related to the disparate base station to the access point base station.
Patent

Systems and methods using antenna beam scanning for improved communications

Piu Bill Wong, +2 more
TL;DR: In this article, a base station radio is provided wireless communication links with a plurality of stations for communication of payload traffic between the base station and stations using a succession of antenna patterns.
Patent

Apparatus and method for transmitting and receiving feedback information in beamforming communication system

Jeong Su Ryong, +3 more
TL;DR: In this article, the authors proposed a method for operating a mobile station in a mobile communication system. The method includes: receiving a plurality of transmit (Tx) beam signals from a base station; generating indication information for indicating a difference in arrival time between effective Tx beam signals selected from the received Tx beacon signals; and transmitting feedback information including the indication information to the base station.
References
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Patent

Resource allocation for MIMO-OFDM communication systems

Jay Rod Walton, +3 more
TL;DR: In this paper, a scheduler forms one or more sets of terminals for possible (downlink or uplink) data transmission for each of a number of frequency bands, with each sub-hypotheses corresponding to (1) specific assignments of transmit antennas to the terminal(s) in the hypothesis (for the downlink) or (2) a specific order for processing the uplink data transmissions from the terminals(s).
Patent

Method and wireless communications systems using coordinated transmission and training for interference mitigation

Arogyaswami Paulraj, +3 more
TL;DR: In this paper, the authors proposed a method for interference mitigation in a wireless communication system having multiple transmitters and receivers by introducing transmission time delays between the transmission of signals from the individual transmitters to ensure coherent reception of the signals at a specific point in the coverage area, such as at a center of distribution of the receivers.
Patent

Channel allocation in broadband orthogonal frequency-division multiple-access/space-division multiple-access networks

Hui Liu, +3 more
TL;DR: In this paper, a network consisting of multiple subscriber units to communicate with the base station using an orthogonal frequency-division multiple-access (OFDMA) protocol, and a base station includes a memory unit to store broadband spatial signature vectors associated with each subscriber and raffic channel allocation logic.
Patent

Feedback to support restrictive reuse

Hemanth Sampath, +1 more
TL;DR: In this article, the authors propose to use a MIMO-VCQI connection layer message to reconstruct the CQI for all reuse sets on a packet-by-packet basis.
Patent

Method of scheduling users in wireless communication networks

Enrico Jugl, +2 more
TL;DR: In this paper, one or more additional users of a group may be selected, to be simultaneously scheduled with a first user of the group that has already been scheduled, based on spatial information of the users in the group.