Abstract:
PROBLEM TO BE SOLVED: To provide a multi-mode base station that supports a transmission standby mode and an active mode.SOLUTION: In the transmission standby mode at least some of the synchronization signaling such as pilot tone signaling is reduced in power level and/or rate with respect to the active mode. Mode transitions from active to transmission standby may be in response to: a detected period of inactivity, scheduling information, base station mode change signals, and/or detected wireless terminal state transition. Mode transitions from transmission standby to active may be in response to: scheduling information, access signals, wake-up signals from the wireless terminal, hand-off signals, etc.
Abstract:
PROBLEM TO BE SOLVED: To provide a wireless terminal to be used for communication with a base station in a communication system including a plurality of base stations. SOLUTION: The wireless terminal includes storing base station position information in a memory; receiving a signal from the first base station; determining a time for transmitting an access signal to the second base station, based on the stored position information indicating the position of the first base station to which a signal to be received by the wireless terminal is transmitted; and transmitting the access signal at a determined time. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To efficiently utilize limited amounts of bandwidth for redundant information communication in improved ARQ mechanisms. SOLUTION: Different NAK signals are used to indicate different relative levels in regard to an unsuccessful attempt to decode a received signal. An ACK signal is used in the case of successful decoding. A device which generates and transmits the original encoded signal receives the NAK signal and selects a portion of redundant information, e.g., additional error correction bits, to be transmitted based on the value of the NAK signal. If the NAK signal indicates a low level decoding success, indicating a relatively large number of errors in the decoded signal, a large set of redundant information is selected and transmitted. If the NAK signal indicates a relatively successful decoding, e.g., relatively few errors, a small set of redundant information is selected and transmitted. When a small set of redundant information is transmitted, new information can be transmitted with the redundant information. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide group communications methods and apparatus for conserving resources. SOLUTION: A multicast operation is supported with transmission characteristics, such as transmission power level, coding rate, and/or modulation method being selected to reliably communicate information to end nodes in the group. Thus, resources can be conserved by matching transmission requirements with information on requirements of one or more group members. The requirements for reliably reaching the end node with the worst channel conditions can determine the group transmission requirements. Also, the requirement can be used for determining the group transmission requirements, and power level and other transmission resource allocations can change in response to changes in group membership and/or conditions corresponding to existing group members. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a system that facilitates mitigating effects of asynchronous behavior when transmitting a data signal.SOLUTION: An appropriate time-shifting mechanism is selectively appended to a data signal in order to rectify negative effects of asynchronous time behavior during a logical data burst. The length of a time offset created by the asynchronous behavior is determined. A cyclic prefix is appended to the beginning and/or end of signals. A receiving mobile terminal can employ a signal processing procedure (e.g., FFT) to all portions of a received signal.
Abstract:
PROBLEM TO BE SOLVED: To provide systems and methodologies that facilitate supporting multiple connections associated with a wireless terminal.SOLUTION: Notifications may be provided to a primary base station upon establishment and/or removal of connections between the wireless terminal and secondary base stations. Additionally, the multiple connections may be evaluated and a preferred connection among the set of multiple connections may be utilized to transfer data to the wireless terminal over a downlink connection.
Abstract:
PROBLEM TO BE SOLVED: To provide systems and methodologies for transmission and reception in a single signal by independently encoding and decoding at least two different types of information.SOLUTION: The method comprises: facilitating transmission of a set of broadcast information bits using a predetermined set of bandwidth degrees of freedom (1400); generating a subset of broadcast information bits (1402); partitioning a predetermined bandwidth degrees of freedom into two or more subsets (1404); choosing at least two or more subsets of bandwidth degrees of freedom of broadcast information bits (1406); selecting bandwidth degrees of freedom in the chosen subset (1408); and transmitting a beacon signal within the selected subset bandwidth degree of freedom (1410).
Abstract:
PROBLEM TO BE SOLVED: To provide devices, systems, or methods providing seamless transition of communication session(s) across a variety of resources (e.g., cellular telephone, car phones, voice over internet protocol (VOIP), WiFi, web-based communications, conventional analog phones, global positioning systems (GPS), numerous communications services providers, a variety of communications protocols, services, etc.) to exploit functionalities.SOLUTION: A first communication session is established using a first set of resources in user equipment, a current establishment state of the first communication session of the user equipment is determined or a future establishment state of the first communication session is inferred, a second set of resources that is available in the establishment state of the first communication session and is different from the first set is detected, and a transition is made to a second communication session using the second set of resources based on the determined or inferred user equipment state.
Abstract:
PROBLEM TO BE SOLVED: To provide a method and an apparatus for selecting between multiple carriers using a single receiver chain tuned to a single carrier.SOLUTION: A receiver is tuned to a single band, and an estimate value of channel quality corresponding to a currently used carrier and an alternative carrier is generated without switching between carriers. Transmitters of different cells and/or different sectors use different carrier frequencies and periodically transmit using a neighboring sector's carrier frequency. Mobile mode receivers use a single RF chain with a controllable filter to receive and process a signal within a first selected carrier band including a first signal component identified within the first currently selected band and a second signal component identified within a second alternative band. Separate quality indicator values are obtained from the first and second signal components and compared, and a determination is made as to whether the receiver's controllable filter should be switched to the second band.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for supporting connectivity with satellite base stations. SOLUTION: An access probe signal is transmitted to the satellite base stations and the reply is received from the satellite base stations. The reply includes information that indicates at least one of the following three, i.e., (i) the indicated amount of main superslot timing offset correction which is equal to the integral multiple of a superslot period; (ii) an identifier for identifying a communication device which transmits an access probe signal to which the received reply corresponds; and (iv) an identifier for identifying the access probe to which the reply corresponds, and performs transmission timing adjustment through the use of the information included in the reply. COPYRIGHT: (C)2011,JPO&INPIT