Abstract:
PROBLEM TO BE SOLVED: To improve throughput and reliability in MIMO wireless network systems. SOLUTION: A wireless communication apparatus includes: a receiver for receiving a signal from a user device; a demodulator for demodulating the received signal; a processor for analyzing demodulated information for assessing at least one of CQI (Channel Quality Index), rank, transmission schedule, packet format and resource assignment related to the user device; a forward link assignment message (FLAM) generator for appending update information to a signal generated by the processor for transmission to the user device; and a transmitter for transmitting the FLAM to the user device. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a rate prediction in a fractional reuse system. SOLUTION: The apparatus and method intended to provide rate prediction is an apparatus and method for rate prediction in a wireless communication system involving fractional frequency reuse. A wireless communication system implementing Orthogonal Frequency Division Multiple Access (OFDMA) implements a fractional frequency reuse plan, in which a fraction of a carrier is allocated to a terminal having no possibility of handoff and another fraction of the carrier is reserved for a terminal having a higher possibility of handoff. The fractions respectively define a reuse set. The terminal is constrained to frequency hop within a reuse set. The terminal is also configured to determine a reuse set based on a present assignment in a subset of the carrier. The terminal determines a channel estimate and a channel quality indicator partially based on at least the present reuse set. The terminal reports the channel quality indicator to a source, which determines a rate based on the index value. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To receive control information while mitigating interference from other transmitters.SOLUTION: The interference is mitigated by wireless network transmitters blanking or reducing power on a portion of bandwidth reserved for control information transmission. The control information portion is divided into a plurality of OFDM tiles that are reusable by the transmitters for transmitting the control information. The transmitters multiplex the control information over the plurality of tiles to increase the probability that at least a portion of the tiles are not interfered, thereby further mitigating the interference between the transmitters. Receivers decode the control information from the portion of tiles with a low probability of the interference.
Abstract:
PROBLEM TO BE SOLVED: To provide a control channel message generation method for using a shared signaling channel to send signaling messages, acknowledgement messages, and power control messages.SOLUTION: A shared signaling channel can be assigned to a predetermined number of sub-carriers within any frame. An embodiment comprises a scheduler to assign logical control channel resources to physical channel resources. The actual sub-carriers assigned to the channel vary periodically, and the amount of signal power varies on a per symbol basis.
Abstract:
PROBLEM TO BE SOLVED: To assign resources corresponding to discontinuous portions of bandwidth.SOLUTION: A single assignment may be used to assign multiple disjoint portions of bandwidth to be used by a wireless terminal at the same time as an uplink or downlink band. Different portions of bandwidth allocated to a terminal may have different numbers and/or locations of guard subcarriers with relevant guard subcarrier information being communicated to the wireless terminal in a broadcast signal or being determined from stored information. The disjoint portions of bandwidth allocated for use to a terminal may be separated by a carrier band, e.g., 1.25 MHz or more, which is not available for use because it is owned by another service provider. Some embodiments are implemented using OFDM signals where a wireless terminal may generate or receive a symbol including subcarriers (tones) corresponding to the different discontinuous portions but not the bandwidth separating the discontinuous portions.
Abstract:
PROBLEM TO BE SOLVED: To support efficient operation by a terminal in an idle state.SOLUTION: A base station transmits a preamble periodically in each superframe. The preamble includes at least one first OFDM symbol for control information and subsequent at least one second OFDM symbol for paging information. A terminal receives the first and second OFDM symbols and determines a receiver gain on the basis of the received power of the first OFDM symbol, e.g., with an AGC loop having a shorter time constant than the duration of the first OFDM symbol. The terminal processes the second OFDM symbol on the basis of the receiver gain to obtain the paging information. The terminal may operate in an idle state, determine superframes assigned to the terminal, sleep between the assigned superframes, and process the first and second OFDM symbols in each assigned superframe to obtain the paging information.
Abstract:
PROBLEM TO BE SOLVED: To provide superframe preamble structures for wireless communication systems.SOLUTION: The preamble can include system determination information, which can improve acquisition performance. The superframe structures can allow efficient determination of flexible parameters that determine the preamble structures. The superframe structures can also facilitate quick paging capacity to scale with bandwidth.
Abstract:
PROBLEM TO BE SOLVED: To provide techniques to support low density parity check (LDPC) encoding and decoding.SOLUTION: LDPC encoding and decoding of packets of varying sizes may be supported with a set of base parity check matrices of different dimensions and a set of lifting values of different powers of two. A base parity check matrix G of dimension m×nmay be used to encode a packet of up to k=n-minformation bits to obtain a coded packet or a codeword of ncode bits. This base parity check matrix G may be "lifted" by a lifting value of L to obtain a lifted parity check matrix H of dimension L m×L n. The lifted parity check matrix H may be used to encode a packet of up to L kinformation bits to obtain a code bit of L ncode bits.
Abstract translation:要解决的问题:提供支持低密度奇偶校验(LDPC)编码和解码的技术。 解决方案:可以用一组不同维度的基本奇偶校验矩阵和两组不同功率的提升值的集合来支持不同大小的分组的LDPC编码和解码。 尺寸为m B SB>×n B SB>的基本奇偶校验矩阵G可用于对高达k B SB> = n B SB> -m B SB>信息位以获得编码数据包或 代码字n B SB>代码位。 该基本奇偶校验矩阵G可以通过提升值L“提升”,以获得尺寸为L的升高的奇偶校验矩阵H m B SB>×L n 乙 SB>。 提升的奇偶校验矩阵H可以用于编码高达L k B SB>信息比特的分组,以获得代码位L n B SB>代码位。 版权所有(C)2013,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide techniques to support low density parity check (LDPC) encoding and decoding.SOLUTION: LDPC encoding and decoding of packets of varying sizes may be supported with a set of base parity check matrices of different dimensions and a set of lifting values of different powers of two. A base parity check matrix G of dimension m×nmay be used to encode a packet of up to k=n-minformation bits to obtain a coded packet or a codeword of ncode bits. This base parity check matrix G may be "lifted" by a lifting value of L to obtain a lifted parity check matrix H of dimension L m×L n. The lifted parity check matrix H may be used to encode a packet of up to L kinformation bits to obtain a codeword of L ncode bits.
Abstract translation:要解决的问题:提供支持低密度奇偶校验(LDPC)编码和解码的技术。 解决方案:可以用一组不同维度的基本奇偶校验矩阵和两组不同功率的提升值的集合来支持不同大小的分组的LDPC编码和解码。 尺寸为m B SB>×n B SB>的基本奇偶校验矩阵G可用于对高达k B SB> = n B SB> -m B SB>信息位以获得编码数据包或 代码字n B SB>代码位。 该基本奇偶校验矩阵G可以通过提升值L“提升”,以获得尺寸为L的升高的奇偶校验矩阵H m B SB>×L n 乙 SB>。 提升的奇偶校验矩阵H可以用于编码高达L k B SB>信息比特的分组,以获得码字L n B < / SB>代码位。 版权所有(C)2013,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide systems and methodologies that facilitate serving sector directed transmit power control in a wireless communication environment.SOLUTION: Under certain conditions, an access point can have better data for determining more appropriate power levels than an individual terminal. Accordingly, an access point can transmit power control information to one or more terminals supported by the access point overriding normal power determination procedures. In particular, power control information can be included within an assignment message that designates resources (e.g., frequency, time) assigned to a terminal. Power control information can be based upon SNR, quality of service requirements, interference information, any other relevant information or any combination thereof.