Patent application number | Description | Published |
20080225788 | Resource allocation control method and device in mobile radio communications system - For radio communications between a base station and a mobile station, resource allocation within a resource block including control resources used for control signals (CQI, ACK/NACK) and reference resources used for a reference signal is performed. The base station measures the quality of a channel between the mobile station and the base station itself. Based on the measured channel quality, the base station sets a ratio between resources for the control signals CQI and ACK/NACK in the control resources, and notifies the mobile station of the set resource ratio. | 09-18-2008 |
20080318608 | METHOD AND DEVICE FOR ASSIGNING REFERENCE SIGNAL SEQUENCES IN MOBILE COMMUNICATIONS SYSTEM - A reference signal sequence assignment method and device are provided by which the influence of inter-cell interference can be reduced and the number of usable cyclic shifted sequences per sector can be increased. In a mobile communications system with a structure including multiple cells each including multiple sectors, a sequence assignment method is employed by which pseudo-orthogonal sequences used for reference signals are assigned to cells or sectors. According to this method, the multiple pseudo-orthogonal sequences are assigned to cells or sectors by using multiple repetition patterns. | 12-25-2008 |
20090011765 | MOBILE COMMUNICATION SYSTEM, ITS SCRAMBLE CODE ASSIGNING METHOD, MOBILE STATION, AND BASE STATION - An object of the present invention is to reduce the amount of calculation performed in a mobile station and amount of information exchanged between a base station and mobile station in a mobile communication system where the base station autonomously assigns a scramble code. In the mobile communication system, the base station starts communication by using a predetermined initialization scramble code used only at its activation time. The mobile station positioned in a cell determines whether the scramble code identified upon cell search time is the initialization scramble code. Only when the scramble code is the initialization scramble code, the mobile station determines a candidate scramble code, determines whether the candidate scramble code is usable in communication, and notifies the base station of the control information including the determination result. Based on the control information, the base station determines a service scramble code to be used, from the candidate scramble codes, and applies the service scramble code to start communication. | 01-08-2009 |
20090097465 | PILOT SIGNAL TRANSMISSION METHOD AND RADIO COMMUNICATION APPARATUS - In a radio communication system, transmission of CAZAC sequences as the pilot signal sequences by using code division multiplexing as at least one of user multiplexing schemes, is done by dividing a system band as a frequency band usable in the system into frequency blocks B | 04-16-2009 |
20100329199 | WIRELESS COMMUNICATION SYSTEM, BASE STATION , RESOURCE BLOCK ALLOCATION METHOD, AND PROGRAM - A scheduling technique for limiting a discontinuous spectrum to reduce control information to be transmitted from a base station (BS) to each of mobile stations. The method has a ranking means for ranking the mobile stations for each resource block depending on the channel status, and an allocation means for allocating the resource blocks to the mobile stations depending on the ranking of the mobile stations so that the number of resource blocks in a resource block group for one mobile station may be not more than a set number. The resource block group including at least one or more continuous resource blocks on the frequency axis. | 12-30-2010 |
20110002282 | WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION SETTING METHOD, BASE STATION, MOBILE STATION, AND PROGRAM - The problem is that, in a mobile wireless system, when more than one frequency block composed of resource blocks that are consecutive on a frequency axis is assigned to one mobile station, the multi-diversity effect due to scheduling increases by the number of assigned frequency blocks being increased, but the overhead caused by the scheduling information increases. Accordingly, there is a tradeoff between the multi-diversity effect and the scheduling overhead. However, when the aforementioned tradeoff was considered with OFDM and SC-FDMA, the same fixed number of frequency blocks would have been used for all mobile stations. Accordingly, an optimization that takes into account the tradeoff between the multi-diversity effect and scheduling overhead has not been sufficiently achieved. In a wireless communication system, the maximum frequency block number, which is the maximum number of the aforementioned frequency blocks assigned to the same mobile station, is set based on system information, which is information pertaining to the base station installation environment and the mobile station or the mobile station's communication status, and the base station assigns no more resource blocks than the aforementioned maximum frequency block number. | 01-06-2011 |
20110110322 | RESOURCE ALLOCATION METHOD, IDENTIFICATION METHOD, RADIO COMMUNICATION SYSTEM, BASE STATION, MOBILE STATION, AND PROGRAM - To solve a problem that although the increase of the number of frequency blocks by allocating discontinuous subcarriers (RBs) as in OFDM enables an increase in multi-diversity effect and an improvement in throughput, the number of RB allocation patterns increases with the increase of the number of frequency blocks, resulting in an increase in the amount of information relating to the allocated RBs, the resource block allocation unit is determined when resource blocks discontinuous on the frequency axis are allocated to a terminal, and the number of bits of scheduling information indicating the allocated resource blocks by using Tree Based is set to the number of bits corresponding to the determined allocation unit. | 05-12-2011 |
20110113433 | RESOURCE ALLOCATION METHOD, IDENTIFICATION METHOD, BASE STATION, MOBILE STATION, AND PROGRAM - Provided is a technique capable of reporting resource block allocation information with no waste when an allocated resource block is reported, because in the current LTE downlink, the waste of the amount of resource allocation information increases in some cases since a restriction is imposed such that 37-bit fixed scheduling information is transmitted. A resource block group consisting of at least one or more resource blocks continuous on the frequency axis is allocated to a terminal, and the number of controlling signals for reporting allocation information indicating the allocated resource blocks is determined. | 05-12-2011 |
20110235604 | COMMUNICATION SYSTEM, COMMUNICATION METHOD, BASE STATION, MOBILE STATION, AND PROGRAM - Provided is a technique for efficiently selecting access schemes for use in communications. This invention includes an identifying means that identifies, from station-on-the-other-end candidate information, which is control information in which information related to an access scheme corresponding to each of a plurality of stations-on-the-other-end of communication is described, and from information related to an access scheme corresponding to the local station, access schemes beforehand one of which can be used in communication with a communication partner station; and a selecting means that selects, as the access scheme to be used in data communication with a communication partner station, one of the identified access schemes when the data communication is started. | 09-29-2011 |
20120008615 | WIRELESS COMMUNICATION SYSTEM, BASE STATION, TERMINAL, WIRELESS COMMUNICATION METHOD, AND PROGRAM - Provided is a wireless communication technique capable of supporting communication using a single component carrier, and communication using a plurality of component carriers. The communication using the plurality of carriers is characterized by using a different signal sequence in each of the carriers, and using the signal sequences as reference signals. The present invention makes it possible to cope with the communication employing a single component carrier and the wireless communication employing a plurality of the component carriers. Further, PAPR of the reference signals can be made small because there is no possibility that the identical CAZAC sequence is used among the component carriers when a plurality of the component carriers are employed. | 01-12-2012 |
20120026962 | WIRELESS COMMUNICATION SYSTEM, BASE STATION, SERVER, WIRELESS COMMUNICATION METHOD, AND PROGRAM - Provided is a wireless communication technique capable of supporting communication using a single component carrier, and communication using a plurality of component carriers. The communication using the plurality of carriers comprises a processing means for performing the signal processing in accordance with each of the carriers with respect to the common signal sequence used by the plurality of carriers. The present invention makes it possible to cope with the communication employing a single component carrier and the wireless communication employing a plurality of the component carriers. Further, PAPR of the reference signals can be made small because there is no possibility that the identical CAZAC sequence is used among the component carriers when a plurality of the component carriers are employed. | 02-02-2012 |
20120269159 | METHOD FOR MULTIPLEXING CONTROL SIGNALS AND REFERENCE SIGNALS IN MOBILE COMMUNICATIONS SYSTEM - A reference signal multiplexing method for multiple mobile stations includes: grouping together control signals for the multiple mobile stations; and multiplexing reference signals corresponding to the control signals by CDM over the same bandwidth as that of grouped control signals. | 10-25-2012 |
20120281665 | WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION SETTING METHOD, BASE STATION, MOBILE STATION, AND PROGRAM - A wireless communication system including a base station and a mobile terminal, includes a setting unit to set a number of sets of at least one or more resource blocks for the mobile terminal, the at least one or more resource blocks of each set being consecutive in frequency. An allocation unit allocates the resource blocks for a transmission channel so that the resource blocks are not contiguous in frequency. A controller generates a reference signal sequence corresponding to a bandwidth of the allocated resource blocks, and maps the reference signal sequence to subcarriers according to an allocation of the resource blocks. | 11-08-2012 |
20130121305 | REFERENCE SIGNAL MULTIPLEXING AND RESOURCE ALLOCATION - A reference signal of a user equipment to which a resource (LB# | 05-16-2013 |
20130196678 | SCHEDULING METHOD AND SYSTEM FOR COORDINATED MULTIPOINT TRANSMISSION/RECEPTION - A scheduling system for coordinated user equipments (UEs) in a network including a plurality of communicating points which can communicate with each other, wherein the coordinated UEs are supported by a serving point and are coordinated with a neighbor point, is characterized in that the serving point and the neighbor point share information related to an available or desired amount of resources for coordinated UEs of the serving point; and the serving point adjusts at least one predetermined parameter related to the coordinated UEs based on the shared information so that the amount of resources for the coordinated UEs at the serving point approaches the available or desired amount of resources for the coordinated UEs at the neighbor point. | 08-01-2013 |
20150043457 | RADIO COMMUNICATION SYSTEM AND COMMUNICATION CONTROL METHOD - A radio communication system includes: a plurality of cells having different scrambling sequences, respectively, wherein at least two cells communicate with at lease two user terminals connected to different serving cells; and a controller which controls the plurality of cells and provides a single scrambling sequence to said at least two cells and said at least two user terminals for control signal transmission and reception. | 02-12-2015 |
20150049621 | RADIO COMMUNICATION SYSTEM AND METHOD - A radio communication system includes a network and a user terminal, wherein the network includes a plurality of radio stations and a controller which controls the plurality of radio stations, wherein at least two of the plurality of radio stations communicate with the user terminal, wherein the controller notifies the user terminal of information about resource for interference measurement, wherein the user terminal calculates and reports channel quality information based on the information. | 02-19-2015 |