Abstract:
PROBLEM TO BE SOLVED: To provide a method for implementing high-speed transmission in an air interface. SOLUTION: A transmit system provides an in-phase channel set 90 and a quadrature-phase channel set 92. The in-phase channel set 90 is used to provide a complete set of orthogonal medium rate control and traffic channels. The quadrature phase channel 92 set is used to provide a high-speed supplemental channel and an extended set of medium rate channels that are orthogonal to each other and the original medium rate channels. The high-speed supplemental channel is generated over a set of medium rate channels using a short channel code. The medium rate channel is generated using a set of long channel codes. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method for transmitting data to a plurality of receivers in a communication system. SOLUTION: The method includes: updating a parameter of a first set used for schedule of data transmission; deciding the priority of the data transmission; allocating data transmission to respective usable channel based in part on at least the priority of the data transmission; updating a parameter of a second set used for transmission of the data transmission; and transmitting the data to a plurality of receivers at a channel allocated by using a second set of the updated parameter. The parameter of first set is a channel occupation possibility, a load possibility, a carrier to interference plus noise (C/I) of the receiver or back-off-factors, or a combination of the above. Deciding the priority includes an operation of calculating the amount of channel of channel usable by each receiver by using the updated parameter of the first set. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a time division duplex repeater for use in a CDMA system. SOLUTION: The present invention relates to a method and apparatus for time division duplex (TDD) relaying a spread spectrum signal, where spread spectrum signal is comprised of a series of code symbol modulated with a pseudonoise (PN) sequence. The TDD repeater receives intermittently the spread spectrum signal at a location remote from a signal source supplying the spread spectrum signal. The TDD repeater amplifies and delays the received spread spectrum signal by a predetermined amount. The TDD repeater transmits intermittently the delayed amplified received spread spectrum signal such that the TDD is not receiving the spread spectrum signal when it is transmitting the signal energy. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method for operating a large number of transmission devices in a radio communication system. SOLUTION: The method includes: segmenting usable system resources into a plurality of channels; defining a reuse scheme including a plurality of cells for the communication system; determining one or more characteristics for each of the cells in the reuse scheme; allocating a combination of channels to each of cells in the reuse scheme on the basis of one or more characteristics for which at least a cell is partially decided; and repeating decision and allocation in order to reflect the change in the communication system. The cells in the reuse scheme are each allocated with the channels of each set for transmission at a full power level. The cells in the reuse scheme are each allocated with channels of each set including one or more channels usable for transmission at a full power level and one or more channels usable for transmission at a reduce power level. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a base station for partitioning and allocating available system resources among cells in a communication system and for allocating resources in each cell for data transmission via an uplink to terminals. SOLUTION: A resource allocation processor included in the base station in the communication system is configured to schedule one or more terminals for uplink data transmission and allocate a channel to each scheduled terminal. The resource allocation processor is configured to receive channel state information (CSI) showing one or more characteristics, schedule terminals and allocate a channel on the basis of the CSI. The resource allocation processor is further configured to determine a plurality of backoff factors with respect to the plurality of channels on the basis of at least a portion of the CSI. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide techniques to partition and allocate the available system resources among cells in a communication system, and to allocate resources in each cell to the terminals for data transmission via the uplink. SOLUTION: In one aspect, adaptive reuse schemes are provided wherein the available system resources may be dynamically and/or adaptively partitioned and allocated to the cells based on a number of factors such as the observed interference levels, loading conditions, system requirements, and so on. A reuse plan is initially defined and may be redefined, to reflect changes in the system. In another aspect, the system resources may be partitioned, such that each cell is allocated a set of channels having different performance levels. In yet another aspect, terminals in each cell are scheduled for data transmission (e.g., based on their priority or the load requirements) and assigned channels, based on their tolerance to interference and the performance of the channel. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a power-efficient wireless device provided with multiple (N) antennas. SOLUTION: Each antenna is associated with a transmitter unit and a receiver unit. The wireless device also has processing units used to perform various digital processing tasks. The transmitter units, the receiver units and the processing units may be selectively enabled or disabled. In an idle state, the wireless device may enable only a subset (e.g., one) of the N receiver units and one or few processing units for signal detection and acquisition. For active communication, the wireless device may enable N tx transmitter units for data transmission and/or N rx receiver units for data reception, where 1≤N tx ≤N and 1≤N rx ≤N. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method for partitioning and allocating available system resources among cells in a wireless communication system and for allocating resources in each cell for data transmission via an uplink to terminals. SOLUTION: A first set of parameters including interference characterization of each cell to be used to schedule terminals for data transmission is received, a priority is given to the terminals to be considered for scheduling, and at least a portion thereof, that is, one or more terminals are scheduled for data transmission on the basis of the priority of the terminals. A channel is allocated to each scheduled terminal based on the priority or load requirements of the terminal. A second set of parameters to be used to control transmission by the scheduled terminal is updated, and one transmission or more is received from the one scheduled terminal or more on the allocated channel. COPYRIGHT: (C)2011,JPO&INPIT