Abstract:
PROBLEM TO BE SOLVED: To provide a sector which estimates interference observed from terminals in neighbor sectors to perform interference control.SOLUTION: A sector may generate an over-the-air (OTA) other-sector interference (OSI) report and/or an inter-sector (IS) OSI report based on an interference estimate value. The sector may send the IS OSI report to neighbor sectors, receive IS OSI reports from the neighbor sectors, and regulate data transmissions for terminals in the sector based on the received IS OSI reports.
Abstract:
PROBLEM TO BE SOLVED: To provide channel quality reporting for adaptive sectorization.SOLUTION: Apparatuses and methodologies are described that enhance performance in a wireless communication system using beamforming transmissions. According to one aspect, the channel quality is monitored. Channel quality indicators can be used to select a scheduling technique, such as space division multiplexing (SDM), multiple-input multiple-output (MIMO) transmission and opportunistic beamforming for one or more user devices. In addition, the CQI can be used to determine the appropriate beam assignment or to update the beam pattern.
Abstract:
PROBLEM TO BE SOLVED: To provide a method of efficiently reducing interference between cells. SOLUTION: For restrictive reuse, each cell (or each sector) is assigned (1) a set of usable subbands that may be allocated to users in the cell and (2) a set of forbidden subbands that is not used. The usable and forbidden sets for each cell are orthogonal to one other. The usable set for each cell partially overlaps the forbidden set for each neighboring cell. If a user (u) observes/causes high level of interference from/to a neighboring cell (y), then the user (u) may be allocated subbands from a "restricted" set containing subbands included in both the usable set for a cell (x) and the forbidden set for a cell (y). The user (u) would then observe/cause no interference from/to cell (y). The subband restriction may be extended to avoid interference from multiple neighboring cells. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide apparatuses and methodologies that enhance performance in a wireless communication system using beamforming transmissions.SOLUTION: A set of transmit beams are defined that simultaneously provides space division multiplexing, multiple-input multiple output (MIMO) transmission, and opportunistic beamforming. The addition of a wide beam guarantees a minimum acceptable performance for all user devices.
Abstract:
PROBLEM TO BE SOLVED: To provide a messaging scheme for controlling transmit power of wireless device.SOLUTION: A wireless node sends vectorized information to another wireless node that uses the information to control its transmit power. In some aspects, the vectorized information may relate to interference observed at a wireless node. In some aspects, the vectorized information may relate to power adjustment offsets. In some aspects, the information may be vectorized based on one or more of different quality of service classes, different assignments within a frame, different permutation zones, different channel differences, different locations of a wireless node, different channel types, different other sector interference values, and different assignment sizes. In some aspects, a wireless node transmits a power control message via an uplink map in an assignment message.
Abstract:
PROBLEM TO BE SOLVED: To provide a plurality of transmission patterns for pilot systems transmitted from a mobile station or base station.SOLUTION: Depending upon frequency selectivity and/or time selectivity of a channel between the mobile station and the base station, an appropriate pattern is selected. The selected pattern allows improved receipt of pilot symbols. In addition, scrambling codes can be applied to the patterns for reducing interference and/or biasing from different mobile stations over the same frequencies and in the same slots.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for reducing interference and degradation of terminal performance caused by transmissions by terminals at sector edges.SOLUTION: This invention facilitates broadcasting an interference level and adjusting transmit power corresponding to a reverse link in accordance with the interference level. An interference indication can be broadcasted on a broadcast channel in a wireless communication system. In response to the broadcast, mobile devices can adjust transmit power on the reverse link on the basis of considerations of the interference level. Further, the mobile devices can evaluate an initial set point of a transmit power level during periods of inactivity.
Abstract:
PROBLEM TO BE SOLVED: To dynamically schedule frequency sets for reuse by user devices in order to reduce inter-cell interference by evaluating an overall scheduling metric for each user device in a wireless communication region. SOLUTION: An overall scheduling metric can be evaluated by determining a fairness metric for each user device in a wireless communication region, an overall channel peak desirability metric for each user device, and a channel delay desirability metric for each user device. The overall scheduling metric can be the function of the fairness metric and one or more of the overall channel peak desirability metric and the channel delay desirability metric. A user device with a highest overall scheduling metric score for a given round of dynamic scheduling can be awarded a frequency set. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To enhance uplink (UL) coverage in interference scenarios.SOLUTION: The invention relates to communication in a wireless network in which user equipment (UE) associated with a first evolved Node B (eNB) experiences interference from a second eNB. The first eNB of the wireless network and a second eNB of the wireless network negotiate for partitioning of subband resources on an uplink. A first subset of the subband resources is assigned to the first eNB, and a second subset of the subband resources is assigned to the second eNB. The user equipment (UE) determines an uplink subframe n containing a protected subband for uplink transmission, decodes a downlink control channel received during a protected downlink subframe, and transmits data during the uplink subframe n on the protected subband.