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
Abstract:
PROBLEM TO BE SOLVED: To provide a pilot signal transmission sequence and to provide method for use in a multi-sector cell. SOLUTION: Pilots are transmitted to different sectors at different known power levels. A pilot is transmitted to adjacent sector, while a zero pilot is transmitted to the adjacent sector. This represents transmission of a NULL pilot signal. A cell NULL is also supported, and in this case, NULL pilots are transmitted to each sector of a cell at the same time. Multiple pilot signal measurements are made. At least two channel quality indicator values are generated from measurement values corresponding to at least two pilot signals of different power levels. The two values are transmitted back to a base station, and the base station uses both values to determine the transmission power required to obtain a desired SNR at a wireless terminal. The wireless terminal also reports information indicating the location to a sector boundary. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To reduce a switching time of a receiver between carrier frequencies, in the receiver comprising a single filter for a handover in a multi-carrier communication system. SOLUTION: A mobile station sends a handoff request to a current BS (Base Station) sector, which forwards the request to a new BS sector, e.g., via a network link. The new BS sector processes the request assigning dedicated resources, e.g., an identifier and dedicated resources, e.g., an identifier and dedicated uplink segments. The mobile station determines the time of the allocated dedicated segments based upon a received beacon signal from the new BS sector with known timing relationships to dedicated segments. The mobile station breaks the original wireless link just prior to the time of the first assigned dedicated segment. The mobile station communicates information on the assigned dedicated segments to perform registration operations, e.g., timing synchronization and power control, establishing a new wireless link. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide methods and apparatus for efficient two-stage paging wireless communications systems. SOLUTION: Wireless terminals are assigned to paging groups. A few first paging message information bits are modulated into a first paging signal (using non-coherent modulation) to be communicated from a base station to a wireless terminal. WT rises, receives the first paging signal, and checks whether the paging group should wait for a second paging signal. If so, the WT is operated to receive the second paging signal. Otherwise, the WT goes back to sleep conserving power. The base station modulates a number of second message information bits (using coherent modulation) to transmit signals to WTs. A WT can determine that it is the paged WT from the information in the first and the second paging signals to process paging instructions. The objective invoked WT can transmit an acknowledgement signal on a dedicated uplink resources. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide methods and apparatus for selecting between multiple carriers, using a single receiver chain tuned to a single carrier. SOLUTION: Although a receiver is tuned to a single band in wireless communication systems employing multiple carrier frequencies, an estimate of the channel quality corresponding to the currently used carrier, and an alternative carrier is generated without switching between carriers. Transmitters of different cells and/or different sectors primarily use different carrier frequencies but periodically transmit using a neighboring sector's carrier frequency. Mobile node receivers use a single RF chain with a controllable RF filter to receive and compare a first signal component identified within the first currently selected band and a second signal component identified within a second alternative band, thereby making a determination as to whether the receiver's controllable filter should be switched to the second band. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method and a device that allow soft handoff to be implemented without necessitating duplication of data transmissions to a plurality of base stations. SOLUTION: Each mobile terminal device 302 can support a plurality of independent timing loops and/or different control loops on a base station-by-base station basis, thereby allowing the connections to operate independently and in parallel. Different control signals and/or data are transmitted through established and independent connections with base stations 304, 306. In this way, the base stations 304, 306 perform reception of different pieces of data that allow asynchronous data transmission. The data received by the base stations 304, 306 can be provided to a wired asymmetric network without necessitating synthesis of the received data before the data is provided to the wired network. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
Methods, systems, and devices are described for wireless communication. Device-to-device (D2D) communications may benefit from the use of a relay facilitating communications between mobile devices. Relays which are not power-limited, such as if the relay is connected to a power grid, may continuously monitor the communication medium. A relay may monitor D2D communications and determine a D2D pair for which to attempt to facilitate communications. The relay may identify a first message from a first mobile device to a second mobile device, and may transmit a second message to the second mobile device. The second message may be transmitted using the same resources as the first message, and may include at least a portion of the first message. The relay may receive a response from the second mobile device and may transmit information about the relay to the second device before facilitating communications between the D2D pair of mobile devices.
Abstract:
A method, an apparatus, and a computer-readable medium for wireless communication are provided. The apparatus retrieves a particular number corresponding to a UE. To retrieve the particular number, the apparatus may receive the particular number through a channel request from the UE. Alternately, the apparatus may assign the particular number to the UE in order to retrieve the particular number. The apparatus determines a resource block within a coverage class based on the particular number. To determine the resource block, the apparatus maps the particular number to a resource block number within the coverage class using a hash function. The resource block number identifies the resource block. The apparatus transmits a device-specific control message to the UE using the determined resource block.