Abstract:
PROBLEM TO BE SOLVED: To transmit data with distributed scheduling and centralized scheduling in a multihop relay communication system.SOLUTION: For distributed scheduling, a relay station may generate and send first channel quality information (CQI) to a base station and receive second CQI from a subscriber station. The relay station may receive data sent by the base station based on the first CQI and may resend the data to the subscriber station based on the second CQI. For centralized scheduling, the relay station may generate first CQI for the base station, receive second CQI from the subscriber station, and send both CQIs to the base station. The relay station may receive data sent by the base station based on the first CQI and may resend the data to the subscriber station based on a scheduling decision determined based on the second CQI. Distributed and centralized power controls are also performed.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for receiving packets via H-ARQ transmissions with interference cancellation in a quasi-orthogonal communication system.SOLUTION: To receive packets with interference cancellation, block transmissions for the packets are received on time-frequency blocks used by these packets. Receiver spatial processing is performed on input symbols to obtain detected symbols. For each packet that is decoded correctly, the transmission for the packet is terminated, and the interference due to the packet is estimated. Receiver spatial processing is performed on the interference-canceled symbols to obtain new detected symbols for all time-frequency blocks used by all correctly decoded packets. Each packet decoded in error and overlapping at least partially with any correctly decoded packet may be demodulated and decoded based on all detected symbols available for that packet.
Abstract:
PROBLEM TO BE SOLVED: To provide an apparatus and a method for enhancing performance in a wireless communication system using beamforming transmission.SOLUTION: The method can include determining channel information for a user, and assigning a user device to at least one of a wide beam or at least one predetermined narrow beam. Further, the method includes assigning another user device during the same time period to at least some overlapping frequencies and the other one of the wide beam and the at least one predetermined narrow beam as the user device. Moreover, the at least one predetermined narrow beam includes a cluster of narrow beams and another cluster of narrow beams. In this case, the first cluster and the another cluster do not overlap.
Abstract:
PROBLEM TO BE SOLVED: To provide a pilot symbol pattern for a pilot symbol transmitted from a mobile station or a base station.SOLUTION: The wireless communication apparatus comprises: at least one antenna; a memory that stores at least one time selective pilot pattern designed for a time selective channel and at least one frequency selective pilot pattern designed for a frequency selective channel; and a processor coupled with the at least one antenna and the memory, the processor selecting one pilot pattern of the at least one time selective pilot pattern and the at least one frequency selective pilot pattern, and setting pilot symbols of the selected pilot pattern to locations close to the edges of the hop region in accordance with a first order term of a communication channel.
Abstract:
PROBLEM TO BE SOLVED: To provide an apparatus and method for increasing system capacity in a multi-access wireless communication system. SOLUTION: Spatial dimensions are utilized to distinguish between multiple signals utilizing the same channel and thereby increasing system capacity. Signals may be separated by applying beamforming weights based upon the spatial signature of a pair of a user device 104 and a base station 102. Grouping spatially orthogonal or disparate user devices on the same channel facilitates separation of signals and maximization of user device throughput performance. User devices may be reassigned to groups periodically or based upon changes in the spatial relationships between the user devices and the base station. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
In an aspect of the disclosure, a method, a computer program product, and an apparatus are provided. The method may be performed by a scheduling entity. The scheduling entity transmits control information in a control portion of the subframe, the control information corresponding to data information within the subframe, transmits the data information in a data portion of the subframe, receives a pilot signal from the set of subordinate entities in a pilot portion of the subframe, and receives an ACK/NACK signal from the set of subordinate entities in an ACK portion of the subframe. The ACK portion is subsequent to the pilot portion of the subframe. The ACK/NACK signal includes acknowledgment information corresponding to the data information. The control portion, the data portion, the pilot portion, and the ACK portion are contained in the same subframe.
Abstract:
Rank indicator and channel quality indicator (CQI) estimation and reporting functionalities are discussed with regard to heterogeneous networks to reduce the number of inconsistent CQI estimates transmitted to an evolved node B (eNB), where the CQI is defined as inconsistent when the rank indicator, on which the CQI is conditioned, is from a different subframe type than the subframe on which the CQI is to be estimated.