Panasonic Corporation

Sun Patent Trust

Panasonic Intellectual Property Corporation of America

Godo Kaisha IP Bridge 1

Optis Wireless Technology, LLC

Matsushita Electric Industrial Co., Ltd.

Panasonic Holdings Corporation

Other

Ntt Docomo, Inc.

Ntt Mobile Communications Network, Inc.

Matsushita Communication Industrial Co., Ltd.

Panasonic Mobile Communications Co., Ltd.

Sadaki Futagi

Daichi Imamura

Takashi Iwai

Atsushi Matsumoto

Yoshihiko Ogawa

Tomofumi Takata

Seigo Nakao

Akihiko Nishio

Kenichi Miyoshi

Masayuki Hoshino

Kazunori Inogai

Katsuhiko Hiramatsu

Masaru Fukuoka

Yasuaki Yuda

Tomohumi Takata

Mitsuru Uesugi

Ayako Horiuchi

Takashi Aramaki

Hitoshi Yoshino

Atsushi Sumasu

Hiroshi Suzuki

Tomohiro Imai

Takashi Kitahara

Keiji Takakusaki

Koichi Homma

Shoji Miyamoto

Takashi Toda

Hideki Yukitomo

Minako Ide

Tadashi Matsumoto

Takao Nihei

Selgo Nakao

Daichl Imamura

Katsuiko Hiramatsu

Kazunari Hashimoto

Kenichi (deceased) Miyoshi

Yoshihiko Owaga

Disclosed are a wireless communication base station device and a division number determination method that improves the frequency diversity effect while maintaining channel estimation accuracy regardless of the number of divisions in the frequency domain of a transmission signal from a wireless communication terminal device. A determination unit determines the number of divisions in the frequency domain of a transmission signal from a wireless communication terminal device. Here, the determination unit increases the number of divisions in the frequency domain of the transmission signal from the wireless communication terminal device as the number of pilot blocks included in the transmission signal increases. In addition, a scheduling unit schedules allocation to the frequency resources of the divided transmission signal according to the number of divisions determined by the determination unit.

Integrated circuit

Disclosed are a wireless transmitter and a reference signal transmission method that improve channel estimation accuracy. In a terminal, which transmits a reference signal using n (n is a non-negative integer 2 or greater) band blocks (which correspond to clusters here), which are disposed with spaces therebetween in a frequency direction, a reference signal controller switches the reference signal formation method of a reference signal generator between a first formation method and a second formation method based on the number (n) of band blocks. In addition, a threshold value setting unit adjusts a switching threshold value based on the frequency spacing between band blocks. Thus, the reference signal formation method can be selected with good accuracy and, as a result, channel estimation accuracy is further improved.

Communication apparatus and reference signal reception method

A scheduling apparatus and a scheduling method, wherein the amount of signaling for frequency resource allocation information can be reduced while maintaining system throughput performance. In a base station apparatus, a scheduling section allocates frequency resources to frequency allocation target terminals based on set frequency allocation units, and a frequency allocation parameter setting section adjusts the set frequency allocation units set in the scheduling section based on cluster numbers. Due to this, in each cluster number, frequency resources can be allocated based on the most suitable frequency allocation units with respect to the signaling bit number. As a result, the amount of signaling for frequency resource allocation information can be reduced. Further, system throughput can be maintained by making the cluster number, which is a parameter having little effect on system throughput, a setting parameter for frequency allocation units.

Integrated circuit, apparatus and method for communication using resource block groups

Provided is a sequence allocation method capable of reducing inter-cell interference of a reference signal when a ZC sequence is used as the reference signal in a mobile communication system. In the sequence allocation method, R×M sequences specified by a ZC sequence number r (r=1 to R) and a cyclic shift sequence number m (m=1 to M) are divided into a plurality of sequence groups X (X=1 to R) in accordance with the transmission band width of the reference signal, so that the ZC sequence is allocated to each cell in each sequence group unit. When it is assumed that R=9 and M=6, the number of sequences is 54. Each of the sequence groups is formed by two sequences. Accordingly, the number of sequence groups is 27. The 27 types of sequence groups are allocated to each cell.

Terminal apparatus and sequence assigning method

A sequence allocating method and apparatus wherein in a system where a plurality of different Zadoff-Chu sequences or GCL sequences are allocated to a single cell, the arithmetic amount and circuit scale of a correlating circuit at a receiving end can be reduced. In ST, a counter (a) and a number (p) of current sequence allocations are initialized, and in ST, it is determined whether the number (p) of current sequence allocations is coincident with a number (K) of allocations to one cell. In ST, it is determined whether the number (K) of allocations to the one cell is odd or even. If K is even, in ST-ST, sequence numbers (r=a and r=N−a), which are not currently allocated, are combined and then allocated. If K is odd, in ST-ST, for sequences that cannot be paired, one of sequence numbers (r=a and r=N−a), which are not currently allocated, is allocated.

Integrated circuit for controlling selection of random access preamble sequence

Provided is a radio communication base station device which can suppress a use amount of an SRS communication resource. In this device, a correlation rule setting unit () sets a rule for correlating a preamble with an SRS transmission time interval so that the preamble transmission time band and the SRS transmission time band are in the same transmission time band. An SRS transmission band decision unit () decides a time interval of a transmission time band which can transmit the SRS according to the preamble transmission time interval inputted from a preamble transmission band decision unit () and the correlation rule setting unit ().

Communication device and integrated circuit

Communication apparatuses and methods reduce the amount of signaling while maintaining a high scheduling gain. A determination unit stores a correspondence between the number of code words and the number of clusters to reduce the maximum value for the number of clusters allocated to each terminal as the number of code words increases, and thus determines the maximum value for the number of clusters based on the number of code words acquired. Based on the number of code words for a transmission signal from a terminal, an estimated value for the reception quality that is output by an estimation unit, and the maximum value for the number of clusters that is output by the determination unit, a scheduling unit schedules the allocation of the transmission signal transmitted by each terminal to a transmission band frequency (frequency resource) so as not to exceed the maximum value for the number of clusters.

Integrated circuit for receiving downlink control information and transmitting uplink data

Provided is a sequence allocation method capable of reducing inter-cell interference of a reference signal when a ZC sequence is used as the reference signal in a mobile communication system. In the sequence allocation method, R&#xd7;M sequences specified by a ZC sequence number r (r=1 to R) and a cyclic shift sequence number m (m=1 to M) are divided into a plurality of sequence groups X (X=1 to R) in accordance with the transmission band width of the reference signal, so that the ZC sequence is allocated to each cell in each sequence group unit. When it is assumed that R=9 and M=6, the number of sequences is 54. Each of the sequence groups is formed by two sequences. Accordingly, the number of sequence groups is 27. The 27 types of sequence groups are allocated to each cell.

A sequence allocating method and apparatus wherein in a system where a plurality of different Zadoff-Chu sequences or GCL sequences are allocated to a single cell, the arithmetic amount and circuit scale of a correlating circuit at a receiving end can be reduced. In ST, a counter (a) and a number (p) of current sequence allocations are initialized, and in ST, it is determined whether the number (p) of current sequence allocations is coincident with a number (K) of allocations to one cell. In ST, it is determined whether the number (K) of allocations to the one cell is odd or even. If K is even, in ST-ST, sequence numbers (r=a and r=N&#x2212;a), which are not currently allocated, are combined and then allocated. If K is odd, in ST-ST, for sequences that cannot be paired, one of sequence numbers (r=a and r=N&#x2212;a), which are not currently allocated, is allocated.

A radio performs random access by receiving control information and grouping a predetermined number of sequences that are generated from a plurality of base sequences into a plurality of groups by partitioning the predetermined number of sequences. At least one of the groups is associated with a first respective range of data amounts and a first respective range of reception qualities. Sequences generated from a common base sequence are arranged in an increasing order of respective cyclic shifts associated with the sequences. A sequence is randomly selected from a plurality of sequences contained in one group of the plurality of groups. A position at which the predetermined number of sequences are partitioned is determined based on the control information. A number of sequences contained in each of the plurality of groups varies in accordance with the control information.

Method and apparatus for random access to radio services

A sequence allocating method and apparatus wherein in a system where a plurality of different Zadoff-Chu sequences or GCL sequences are allocated to a single cell, the arithmetic amount and circuit scale of a correlating circuit at a receiving end can be reduced. In STa counter (a) and a number (p) of current sequence allocations are initialized, and in STit is determined whether the number (p) of current sequence allocations is coincident with a number (K) of allocations to one cell. In STit is determined whether the number (K) of allocations to the one cell is odd or even. If K is even, in ST-ST, sequence numbers (r=a and r=N&#x2212;a), which are not currently allocated, are combined and then allocated. If K is odd, in ST-ST, for sequences that cannot be paired, one of sequence numbers (r=a and r=N&#x2212;a), which are not currently allocated, is allocated.

Growing community of inventors

Ishikawa, Japan

Sadaki Futagi