640 results about "Base station identity code" patented technology

A wireless terminal receives signaling information, pertaining to a reference signal transmission in at least one specifically designated sub frame, the signaling information including a list, the list including base station identities. The terminal determines, from at least one of the base station identities in the list, the time-frequency resources associated with a reference signal transmission intended for observed time difference of arrival (OTDOA) measurements from a transmitting base station associated with said one base station identity. The time of arrival of a transmission from the transmitting base station, relative to reference timing, is measured. The wireless terminal can receive a command from a serving cell to start performing inter-frequency OTDOA measurement on a frequency layer containing reference signals, the frequency layer distinct from the serving frequency layer, the serving frequency layer not containing positioning reference signals. The wireless terminal can perform OTDOA measurements subsequent to the reception of the command on a carrier frequency different from the serving cell carrier frequency. A base station transmitter can jointly schedule a reference signal transmission from a plurality of base station transmitters for the purpose of OTD estimation enhancement, and transmit identical reference signals from the plurality of base station transmitters, the reference signals being identical both in the signal sequence and time-frequency resources used for transmission.

In packet communications between a mobile terminal and a base station, the mobile terminal checks a priority level of a traffic and judges a type of the traffic, and transmits a reservation signal for a transmission request to the base station when the type of the traffic is a high priority level or realtime type, and does not transmits it when the type of the traffic is a low priority level or non-realtime type, while the base station determines a resource amount to be reserved for packet transmission according to a resource utilization state and the reservation signal for the traffic of the high priority level or realtime type, or an average transmission interval or transmission rate for the traffic of the low priority level or non-realtime type according to margins in remaining resources, and notifies the resource amount or the average transmission interval or transmission rate to the mobile terminal.

A mobile station device transmits a random access preamble to a base station device and performs uplink timing alignment based on the synchronization timing deviation information included in a random access response which the base station device transmits in response to the transmitted random access preamble, wherein in an uplink synchronous status, the mobile station device does not perform uplink timing alignment based on synchronization timing deviation information included in a random access response, which is a response to a random access preamble whose preamble ID is randomly selected by the mobile station device.

A base station device includes: a re-synchronization factor detector that detects an uplink re-synchronization factor of a mobile station device; a data controller that generates, when the re-synchronization factor detector detects the uplink re-synchronization factor, data in which information indicative of an uplink synchronization request addressed to the mobile station device is set to a region on a radio frame to which parameters to be used for synchronous communication with the mobile station device are to be set; and a transmitter that transmits data generated by the data controller.

A mobile station device that communicates with a base station device, including: a downlink synchronization error detecting portion that detects the occurrence of a downlink synchronization error from the measurement result of a transmission signal of the base station device; a synchronization monitoring portion that sets information showing the occurrence of a downlink synchronization error into a random access channel based on the downlink synchronization state or both the downlink and uplink synchronization states of the mobile station device; and a downlink synchronization error notifying portion that transmits the random access channel to the base station device.

A wireless base station sends transmission parameters that specify a control signal coding rate and a data signal coding rate which satisfy a BLER (Block Error Rate) required for a control signal and a data signal in a TTI (Transmit Time Interval) scheduled in response to a transmission request from a mobile station. In the specified TTI, the mobile station applies the coding rates, included in the transmission parameters and specified for the control signal and the data signal, to the control signal and the data signal, time-division multiplexes the coded control signal and coded data signal to generate constant transmission-power transmission data, and sends the generated transmission data to a wireless base station via PUSCH.

A radio communication system includes a base station device and a plurality of mobile station devices which radio-communicate with the base station device. The base station device allocates random access signal identifiers for identifying random access signals to the mobile station devices and decides an allocation period for each of the random access signal identifiers used by the mobile base stations. During the allocation period, each of the mobile station devices transmits a random access signal corresponding to the allocated random access signal identifier. Thus, it is possible to suppress a delay until the random access procedure using a dedicated preamble is complete.

[Object] To provide a communication device that enables degradation in the quality of communication between a base station device and a terminal device to be avoided when a sidelink channel is set.[Solution] There is provided a communication device including: a control unit configured to allocate a predetermined gap to a boundary of a resource of a channel to be used in inter-device communication with a resource other than the resource of the channel in a communication system in which signals from different transmission sources are mixed and placed.

The disclosure concerns an inter-base station frame synchronization system for use in a mobile communication system having at least one master base station and a plurality of slave base stations. The master base station is arranged to transmit a control channel signal to the slave base stations located around the master base station in synchronization with a reference frame timing. The slave base stations set a control channel signal observation period. The slave base stations are arranged to generate frame timing based on timings of a received control channel signal from the master base station or other slave base stations when the received control channel signal is received during the control channel signal observation period.

It is possible to realize reduction of inter-cell interference by an adaptive FFR with a low delay. A terminal (200) includes: an interference condition detection unit (209) which detects an interference condition of other cell to the local cell; a cell identification unit (210) which acquires signals for cell identification of each base station; and a sub-band selection unit (211) which selects a sub-band used for the downstream line transmission to the local station according to the interference condition detected by the interference condition detection unit (209) and the signals for cell identification of each base station obtained by the cell identification unit (210). Thus, the terminal (200) can autonomously select a small sub-band of inter-cell interference and to realize reduction of the inter-cell interference by the adaptive FFR with a low delay.

A mobile communication system of the present invention generates a gap section based on a channel quality indication, and determines the timing or the frequency of generating the gap section based on a given parameter between the base station device and the mobile station device.

In order to perform efficient communications, provided is a terminal device configured to communicate with a base station device. The terminal device includes: a reception unit configured to receive a higher layer signal including a configuration relating to a physical uplink shared channel (PUSCH); a scrambling sequence generator configured to, if the terminal device supports a capability relating to low complexity and / or coverage enhancement, apply the same scrambling sequence to the PUSCH during a certain period; and a transmission unit configured to transmit the PUSCH, on the basis of the number of repetitions in the configuration relating to the PUSCH.

A mobile station device transmits a random access preamble to a base station device and performs uplink timing alignment based on the synchronization timing deviation information included in a random access response which the base station device transmits in response to the transmitted random access preamble, wherein in an uplink synchronous status, the mobile station device does not perform uplink timing alignment based on synchronization timing deviation information included in a random access response, which is a response to a random access preamble whose preamble ID is randomly selected by the mobile station device.

A service kind determining section 152 determines a service class from service information included in the header of transmission data of each communication terminal apparatus. A maximum retransmission number setting section 153 sets the maximum number of retransmissions from an allowable delay time allowed in each service class. An MCS selecting section 154 decides a communication terminal apparatus that transmits a packet based on a report value from each communication terminal apparatus, and outputs information indicating the destination apparatus to a transmission queue 156 with reference to a determination result of a user determining section 151. Moreover, the MCS selecting section 154 selects a suitable modulation system and a coding rate from the MCS selection table 154 based on the maximum number of retransmissions of the destination apparatus and the report value, and outputs information indicating the selected modulation system and coding rate to a multiplexing section 157, an error correction coding section 158 and a modulating section 159. This makes it possible to decide an optimal combination of the modulation system and the error correction coding system.

Provided is a base station device capable of suppressing power consumption of a radio communication device and transmitting a pilot signal for measuring an uplink channel quality in a high frequency use efficiency. The base station device (2) includes: a resource block size decision unit (54) which decides the number of subcarriers to be allocated for the radio communication device (1); and a cyclic shift delay amount decision unit (55) which sets a cyclic shift delay amount used when performing cyclic shift delay diversity transmission according to the number of subcarriers decided by the resource block size decision unit (54). By using the cyclic shift delay amount set by the cyclic shift delay amount decision unit (55), the radio communication device (1) cyclic shift delay diversity transmission of the channel quality measuring signal.

A base station device includes: a re-synchronization factor detector that detects an uplink re-synchronization factor of a mobile station device; a data controller that generates, when the re-synchronization factor detector detects the uplink re-synchronization factor, data in which information indicative of an uplink synchronization request addressed to the mobile station device is set to a region on a radio frame to which parameters to be used for synchronous communication with the mobile station device are to be set; and a transmitter that transmits data generated by the data controller.

A base station device is provided with a MAC unit 30 which performs processing on a MAC layer for wireless communication, a scheduler 10 which performs scheduling for determining allocation of radio resources, and a radio resource management unit 70 which manages the radio resources. The scheduler 10 is connected to the radio resource management unit 70 so as to obtain information from the radio resource management unit 70 without intervention of the MAC unit 30.

A base station device provided with a plurality of antennas has a mode, in which all the antennas are used, and a mode, in which the plurality of antennas are divided into a plurality of groups each including two or more antennas to be used independently. An array antenna pattern is formed selectively in these modes. When the array antenna pattern is to be formed in the mode of using all the antennas, a signal of one synthesizer is applied to transmission / reception circuits of all the antennas. In the mode of using antennas divided into the plurality of groups, signals of different synthesizers are supplied to the transmission / reception circuits of the antennas.

An object of the present invention is to provide a communication system capable of preventing a base station device from being occupied by specific communication terminal devices and preventing a situation in which the base station device cannot accommodate other communication terminal devices. In the present invention, in Step ST1403, a HeNB_A notifies UEs being served thereby of the MTCD restriction information indicating the operation of restricting MTCDs. Among the UEs that have received the MTCD restriction information in Step ST1404, an MTCD operates in accordance with the MTCD restriction information. Specifically, in Step ST1406, the MTCD judges whether or not the MTCD can select, as a suitable cell, a cell judged to satisfy cell selection criteria in Step ST1402. In a case of judging that the cell can be selected, the MTCD selects the cell as a suitable cell in Step ST1407.

A mobile communication system includes a mobile station device and a base station device. The base station device includes a cell identification information transmission unit which transmits cell identification information of base station devices transmitting radio signals of the same synchronization channel, to the mobile station device when there are at least two base station devices transmitting radio signals of the same synchronization channel within a predetermined communication area. The mobile station device includes a measurement result transmission unit which performs a measurement process based on the cell identification information of the base station devices and transmits the measurement result acquired by the measurement process to the base station device.

Provided is a multi-antenna transmission device (400) which can perform MLD by using a simple configuration of a reception device in a MIMO-AMC system. The multi-antenna transmission device (400) includes common signal point mapping units (401, 402) for mapping data transmitted from different antennas (111, 112) in a MIMO space multiplex transmission, to common signal points shared by respective modulation methods. Thus, the arrangement of baseband signal points obtained by mapping a code word after channel encoding onto an IQ plane can be shared as common signal points shared by modulation methods. Accordingly, the reception device need not prepare a particular circuit for performing MLD calculation in accordance with a combination of the methods for modulating the signals which have been MIMO-space multiplexed. This can reduce the circuit size of the MLD calculation circuit.

The invention relates to a frequency planning method in GSM network. The frequency planning method in GSM network comprises the following steps: A, infrastructure data collection and collation; B, coverage optimization; C, neighboring optimization; D, optimization of same frequency and same BSIC (Base Station Identity Code); E, measured data collection and collation; F, interference matrix building; G, frequency model judgment; H, planning object selection; I, frequency planning; and J, cutting implementation according to frequency planning results; Step B is based on data of Step A, in Step B, a comprehensive general survey on the planning network is made, an antenna of the network, a repeater, an indoor distribution system and an extension system are understood and mastered comprehensively; and then coverage is optimized; Step G is based on data of Step A, through the analysis of network mean carrier frequency configure number and density of mean carrier frequency configure per unit area, the method for optimal frequency multiplexing model is acquired; Step G is based on data of Step A, according to requirements of the planned residential areas, a region, scale and capacity, the method for planning the region is acquired. The invention has high response speed.

A terminal 100 detects a moving speed of the terminal 100 and discriminates if it is necessary to switch a radio link between a radio link 102 without soft handover and a radio link 103 with soft handover, when it is necessary to switch the radio link, a request to switch states with / without soft handover 106 is sent to a base station 101, the base station 101 switches the states with / without soft handover based on the request to switch states with / without soft handover 106, in addition, an instruction to switch states with / without soft handover 107 is sent to the terminal 100, and the terminal 100 switches the states with / without soft handover based on the instruction to switch states with / without soft handover 107.

A mobile station device transmits a random access preamble to a base station device and performs uplink timing alignment based on the synchronization timing deviation information included in a random access response which the base station device transmits in response to the transmitted random access preamble, wherein in an uplink synchronous status, the mobile station device does not perform uplink timing alignment based on synchronization timing deviation information included in a random access response, which is a response to a random access preamble whose preamble ID is randomly selected by the mobile station device.

The invention discloses an method for evading co-channel interference between basic stations, which includes following steps: periodically measures co-channel interference power of each up-link subchannel; classifies the codes in the time slot whose interference power exceeds the preset threshold in the protection code field; then makes the codes outside the protection code field as the adjusting and distributing resource when adjusting and distributing resources. The invention also discloses a control device which includes a measuring unit which is used for measuring co-channel interference power of each up-link subchannel; an identifying unit which is used for identifying the codes corresponding to the time slot whose interference power exceeds the preset threshold; and an adjusting and distributing unit which is used for resource adjusting and distributing. Meanwhile, the invention also discloses a basic station device. Through calculating the interference power of each time slot, the invention identifies the codes corresponding to the time slot whose interference power exceeds the preset threshold as the unusable resource and does not regards the codes as the adjusting and distributing resource; therefore can evade the co-channel interference from other basic stations.

The invention discloses a cellular communication system and a cell filtration method thereof. The communication system comprises user equipment and a plurality of base station devices, and the base station devices comprise a macro base station, a micro base station and a home base station; a neighbor cell list is established in the macro base station and the home base station, and the list comprises neighbor cell information of neighbor macro base station and home base stations; the neighbor cell list comprises the following attributes: neighbor cell information, tracking cell identification of cells, whether the cells are private, whether the cells can be switched, and whether X2 interfaces exist; the neighbor cell information of the macro base station comprises cell information of adjacent macro base stations and home base stations within the coverage range; and the neighbor cell information of the home base station comprises cell information of adjacent home base stations and cell information of macro base stations where the home base stations are positioned. The cellular communication system and the cell filtration method thereof can reduce signaling cost and improve switching performance.

A method and system for handover of a mobile station (MS) to an unlicensed mobile access network controller (UNC) in an unlicensed mobile access network (UMAN). In one embodiment, the MS sends an unlicensed mobile access (UMA) radio resource (URR) Registration Request message to the UNC with one or more location identifiers for the MS. The location identifiers may include a GSM Cell Global Identity, an access point (AP) Radio Identity, a set of GPS coordinates, or an AP location. The UNC selects absolute radio frequency channel numbers (ARFCN) and base station identity codes (BSIC) values from a table based on the location identifiers and returns them to the MS in a URR Registration Accept message.

Provided is a network management device capable of suppressing interference of a preamble between cells while securing a predetermined resource. An FGW (500) as the device is a network management device for managing a plurality of base station devices each of which perform communication with communication terminal devices by the SC-FDMA method, wherein the FGW (500) is provided with a parameter determination unit (530) for determining parameters related to an uplink preamble with respect to at least one among the plurality of base station devices, and a parameter notification unit (540) for sending notifications of the determined parameters to the base station devices for which the parameters have been determined; wherein the parameter determination unit (530) determines the parameters so that transmitted sequences of the preamble do not overlap between at least two of the plurality of base station devices.

Provided is a mobile station device which can increase the success ratio and reduce a communication delay when transmitting a dedicated preamble from the mobile station device to a base station device by using a random access channel (RACH). The mobile station device performs random access to the base station device by using a dedicated preamble. The mobile station device transmits a first message by using the dedicated preamble and again transmits the first message using the dedicated preamble during a period (a random access response reception-uncertain period) when the base station device may transmit a second message as a response to the first message.