Abstract:
PROBLEM TO BE SOLVED: To provide a wireless communication system and method in which high speed uplink packet access to a base station is made from user equipment. SOLUTION: Each user equipment 128, 130 and base station 114, 116, 118, 120 includes a transmitter, a receiver, and a controller. The user equipment 128, 130 transmits data packets to the base station 114, 116, 118, 120. The base station transmits control information corresponding to the data packets to the user equipment 128, 130. The control information includes at least one channelization code allocated to the user equipment 128, 130. The controller minimizes the channelization code per scheduling active set cell to be monitored by the user equipment based on the channelization code in response to handoff and/or transferring to an active channel state. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a resource assignment system which produces a better trade off between a performance of a cell outer and an overall spectrum efficiency. SOLUTION: A power control parameter fraction is determined, based on the maximum transmission power, a propagation loss threshold and a channel condition. A data rate which can be supported is determined, based on a transmitting power level, and a minimum bandwidth is determined, based on the data rate which can be supported. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a wireless communication terminal that performs communication by a plurality of sub-carriers divided into a plurality of frequency bands, wherein each frequency band includes at least one sub-carrier. SOLUTION: The wireless communication terminal successively generates channel quality indicator (CQI) measurement information reports based on CQI measurements, wherein each report includes non-differential channel quality indicator measurement information for at least one of the frequency bands and differential channel quality indicator measurement information for all other frequency bands. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an efficient signal system for supporting the high speed uplink packet access service (HSUPA) for relieving a resource usage amount and an arithmetic processing load. SOLUTION: A cellular communication system (100) comprises a first base station (103) which schedules resource for a user equipment (101). When receiving a resource allocation message, the user equipment (101) transmits a first message comprising a transmit indication to a plurality of base stations (103 to 109) wherein the transmit indication is indicative of a subsequent transmission of a second message. The user equipment (101) then proceeds to determine a transmit format for the second message; and to transmit the second message to the plurality of base stations (103 to 109). When receiving the transmit indication, the plurality of base stations (103 to 109) proceed to configure their receivers to receive the second message. The first message may be transmitted in a control channel and the second message may be transmitted in a user data channel. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a method and a system for reducing the number of channelizing codes to be minimum, which must be monitored for each cell, when a user device is in an active set. SOLUTION: In a wireless communications system and a method for performing high-speed uplink packet access to a base station from the user device, each of the user device and the base station includes a transmitter, a receiver, and a controller. The user device is designed to transmit a data packet to the base station. The base station is designed to transmit control information corresponding to the data packet to the user device. The control information includes a user device absolute addition channel identification and includes at least one channelizing code assigned to the user device. The controller reduces the number of channelizing codes to be a minimum, which must be monitored for each cell by the user device, based on the channelizing code absolute addition channel identification, based on the transition to a hand-off state and/or to an active channel state. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a digital wireless communication system that reduces scheduling and ARQ delay. SOLUTION: A method in which a mobile station 1014 transmits data includes a step wherein data is transmitted over a first reverse link channel 406, and a step wherein a corresponding available transport format and resource relative information (TFRI) for demodulating and decoding the transmission data are transmitted over a second reverse link channel 412. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a digital wireless communication system that reduces scheduling and ARQ delay. SOLUTION: A base station 301 schedules one mobile station 104 based upon scheduling information 402 and a link quality measure received from each mobile station 1014, and decodes first data received from the scheduled mobile station 1014. If the decoding ends in failure, the base station 301 rereceives data from the scheduled mobile station 1014 and puts the rereceived data together with previously received data to generate composite data. In this case, the generation of composite data is performed until the decoding of the composite data is successful or batch erasure of a hybrid automatic retransmission request (H-ARQ) buffer is performed. When decoding of one of the first data and composite data is successful, an acknowledgement signal is transmitted to the mobile station 1014 and batch erasure of the H-ARA is performed in response to the acknowledgement signal. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To solve a problem that a mechanism for a single resource allocation and a mechanism capable of allocating resources based on demands of each of user equipment are required in the case of a frame or a transmission time interval (TTI) constituted of a chain of sub-frames. SOLUTION: The present invention relates to a method in a wireless communication terminal (103) including receiving a plurality of sub-frames having time-frequency resource elements and resource allocation fields associated with a corresponding sub-frame, wherein the resource allocation fields indicate a resource assignment. In another embodiment, the terminal receives a radio frame comprising a plurality of sub-frames and a frequency diverse allocation field indicating frequency diverse resource allocations in multiple sub-frames of the radio frame. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To automatically shift up or down data rates for high data rate channels based on channel quality feedback on dynamic rate switching and scheduling control. SOLUTION: A plurality of mobile units to require data transmission thereto, are determined and then, a metric is determined for each of the plurality of mobile units to require data transmission thereto. On the basis of the relevant metric, then, one mobile unit is selected out of the plurality of mobile units to require data transmission thereto. A transmission rate is then determined based on channel conditions and a coherence time remaining in a fade cycle, and a packet is transmitted to the selected mobile unit at the determined transmission rate. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a resource assignment scheme and a signaling method which can suit for both an FS user and an FNS user in a wireless communications system. SOLUTION: In an OFDM wireless communication system, a method of assigning resources for the FS (frequency selectivity) user and the FNS (frequency non-selectivity) user includes a step to assign first frequency resources including at least two approaching subcarriers to at least one FS user to a certain time interval and to assign second frequency resources to at least one FNS user, including at least two discontinuous subcarriers with respect to each FNS user to the inside of the same time interval. The first frequency resources and the second frequency resources are a part of common frequency channels. COPYRIGHT: (C)2007,JPO&INPIT