Abstract: A system for communications on an extraterrestrial body may include a space-based component and an ancillary extraterrestrial component on the extraterrestrial body. The space-based component may be configured to provide wireless communications with a plurality of radioterminals located on the extraterrestrial body over a satellite frequency band wherein the space-based component includes at least one satellite orbiting the extraterrestrial body. The ancillary extraterrestrial component may be configured to provide wireless communications with the plurality of radioterminals located on the extraterrestrial body. Moreover, the ancillary extraterrestrial component may reuse at least one satellite frequency of the satellite frequency band, and the space-based component and the ancillary extraterrestrial component may be configured to relay communications therebetween. Related methods are also discussed.

Abstract: According to an embodiment of the present invention, on a radio resource block for Multi-BS MIMO, one of the coordinating base stations selects a mobile terminal at first, and informs the other base stations of the characterization information and the pre-coding information etc. of the selected mobile terminal, and the selection made by the other base stations will obey the selection result of the base station that selects at first. By applying the method and apparatus provided by the present invention, the joint selection of object terminals in the Multi-BS MIMO is realized, and such selection is distributed without any central scheduling device which is necessary in the central scheduling scheme. In addition, only very limited information exchange among the coordinating base stations is required to realize the present invention.

Abstract: Methods, systems, and computer readable media for mobile communication device-initiated network monitoring services are disclosed. According to one aspect, a method for monitoring communications in a mobile networking environment by a core network probe-based monitoring system includes detecting, by an agent residing on a mobile communication device, a quality of service or customer experience triggering event; responding to the event by generating a message which includes information about that particular subscriber or device; and, transmitting that message to the network monitoring system to automatically trigger the monitoring system to monitor communications involving that mobile communication device.

Abstract: Systems and methods for multiple network mode selection devices in accordance with embodiments of the invention are disclosed. In one embodiment of the invention, a multiple network mode selection device includes a processor, a radio module connected to the processor, and network determination process storage connected to the processor and configured to store one or more network determination processes, wherein the processor is configured to connect to a first network using the radio module, execute a network determination process selected from the one or more network determination process, reprogram the radio module in response to the executed network determination process, and connect to a second network using the radio module, where the second network is separate from the first network.

Abstract: A base station apparatus, in a mobile communication system comprised of a plurality of base station apparatuses for performing transmission using mutually different frequency bands and a mobile station apparatus capable of concurrently communicating with each of the base station apparatuses, makes a determination whether the mobile station apparatus needs to perform Inter-Frequency Measurement to communicate with the plurality of base station apparatuses, and when Inter-Frequency Measurement is needed, based on the number of frequency bands of base station apparatuses that concurrently communicate with the mobile station apparatus and the number of frequency bands that the mobile station apparatus is capable of concurrently receiving, selects one of a first Inter-Frequency Measurement method without the need for providing a measurement gap in one of the frequency bands, and a second Inter-Frequency Measurement method with the need for providing a measurement gap in one of the frequency bands.

Abstract: Systems and methods are disclosed for reusing resources of a wireless network. Radio communications resources of the wireless network are divided into partitions. A system described herein allows access to resources in the first partition by a first set of users for primary communications on the first partition, and allows access to resources in the first partition by a second set of users for secondary communications on the first partition. The control system also allows access to resources in the second partition by the second set of users for primary communications on the second partition, and allows access to resources in the second partition by the first set of users for secondary communications on the second partition.

Abstract: Systems and methods for enabling different network nodes of a network access system to share a backhaul communication link are disclosed. In one embodiment, the method includes: connecting a first modem to a first node of the network access system; connecting a second modem to a second node of the network access system; connecting the first modem to a first port of a splitter filter; connecting the second modem to a second port of the splitter filter; and connecting a backhaul communication link to a third port of the splitter filter, which is configured to multiplex signals transmitted by the modems onto the backhaul communication link, wherein the frequency spectrum of the signal transmitted by the first modem does not overlap substantially with the frequency spectrum of the signal transmitted by the second modem.

Abstract: A group of multiple base stations implements distributed and coordinated antenna beamforming selection to achieve increased performance. Each of the base stations in the group determines an associated optimal set of antenna beam direction parameters in a distributed manner based on local radio information exchanged between neighboring ones of the base stations. Each of the base stations transmits to one or more user equipments (UEs) served by that base station using its associated optimal set of beam direction parameters. The local radio information generated by one of the base stations indicates how the transmissions of its neighbor base stations affect the performance of the base station. The performance of a base station may be measured by the difficulty or challenge in maintaining a minimum desired signal quality, e.g., a minimum SINR, for the UE served by the base station.

Abstract: The present invention relates to the field of coordinated multipoint transmission and reception (CoMP) in wireless communication networks, in particular to methods, an apparatus, and a network node for use in performing coordinated data transmissions in a wireless communication network. A method for use in a network node for coordinating data transmission to user equipments in a wireless communication network, wherein the wireless communication network comprising at least two access nodes each access node having one or more antennas and being arranged to perform coordinated data transmissions to user equipments is provided.

Abstract: Systems and methods for distributed antenna system reverse path summation using signal-to-noise ratio optimization are provided. In one embodiment, a method for reverse path summation for a distributed antenna system comprises: normalizing an uplink noise floor for a plurality of remote antenna units of a distributed antenna system, wherein the uplink noise floor is normalized based on a first remote antenna unit having a lowest noise floor of the plurality of remote antenna units; and scaling an uplink output gain of each of the plurality of remote antenna units by a scaling factor, wherein the scaling factor attenuates the uplink output gain based on a composite maximum host peak power for a host unit coupled to the plurality of remote antenna units.

Abstract: An operation control method in a base station of a wireless communication system includes: checking whether or not an allowed mobile station exists in coverage of the base station and overall coverage of base stations adjacent to the base station; and controlling the base station to perform transmission/reception at a predetermined period through a first discontinuous operation, when the allowed mobile station does not exist in the coverage of the base station and the overall coverage of the adjacent base stations.

Abstract: A method including receiving, by a multiband, multimode user device, a request pertaining to a data flow; determining a state of the multiband, multimode user device; selecting at least one of multiple channels or multiple frequency bands, and a single mode, or selecting at least one of multiple channels or multiple frequency bands, and multiple modes to satisfy the request based on the state of the multiband, multimode user device; and using the selected at least one of multiple channels or multiple frequency bands, and the single mode, or the selected at least one of multiple channels or multiple frequency bands, and the multiple modes to satisfy the request.

Abstract: The present invention provides a method and an apparatus for managing a base station configuration, wherein the method comprises the following steps of: acquiring identity information of a user (S102); selecting an operation mode corresponding to the identity information of the user (S104); and prompting the user to configure and manage configuration parameters of a base station in the operation mode (S106). The present invention reduces the work of the common maintenance personnel, improves the work efficiency of the common maintenance personnel and saves the operation and maintenance cost.

Abstract: A method and apparatus are provided for reconnecting from a serving coordinator of a serving WPAN to a coordinator of another WPAN. The method includes broadcasting a neighbor terminal information request message periodically to neighbor terminals; receiving a neighbor information response message, having neighbor terminal information and LQI, from at least one neighbor terminal, responding to the neighbor terminal information request message; storing a neighbor table having the LQI and the neighbor terminal information included in the neighbor information response message, the neighbor terminal information including the LQI, a PAN ID of a WPAN to which the at least one neighbor terminal belongs and neighbor router information about the at least one neighbor terminal; and reconnecting to the coordinator of the another WPAN using the LQI and the neighbor terminal information and communicating with the coordinator of the other WPAN.

Abstract: Provided is a method for a multiple radio access technology (RAT) terminal defining information related to a trigger metric and scanning for transmitting channel state information regarding a second system to a first system, and transmitting the channel state information regarding the second system to the first system. A method for the terminal transreceiving data with a first base station supporting a first base station and with a second base station supporting a second RAT in a radio access system supporting multiple RAT, according to one embodiment disclosed in the present invention, comprises: a step of receiving from the first base station triggering information related to the transmission of the channel state information regarding the second base station; and transmitting the channel state information on the second base station to the first base station.

Abstract: Techniques in a wireless device for facilitating communication for different types of wireless networks are described. The device displays a list of identifiers of wireless networks, and receives an input request for selecting one of the wireless networks for communication. When the selected wireless network is of a first type, the device attempts to establish a connection with the selected wireless network. When the selected wireless network is of a second type, the device launches or displays an input prompt to launch an application having a stored association with a device type of the selected wireless network.

Abstract: A method and apparatus for configuring a portable first cellular base station to operate in a digital cellular telecommunications network includes: placing the first cellular base station in the digital cellular telecommunications network; detecting with a radio receiver at least one second operating cellular base station within the digital cellular telecommunications network; demodulating a first transmission of the at least one second cellular base station transmitter to obtain a first data stream; predictively modifying the first data stream to create a modified first data stream; correlating at least one periodic portion of the modified first data stream to form an enhanced data signal; decoding the enhanced data signal to obtain information including at least the location area code for the at least one second operating cellular base station and a neighbor list of neighboring cellular base station scrambling codes; and configuring the first cellular base station to have the same scrambling code as one of

Abstract: In accordance with an embodiment of the present invention, a method for providing wireless communication system includes receiving a reference signal from each base station of a plurality of base stations serving a mobile station. The received reference signals are measured to compute a single cell feedback matrix and a combining matrix for each channel between the plurality of base stations and the mobile station. A channel state information is generated having information about the combining and the single cell feedback matrices. The channel state information is transmitted to the plurality of base stations.

Abstract: The present invention discloses a method, an apparatus, and a system for initializing a cognitive system supported by a cognitive pilot channel, where implementation of the method includes: sending a frequency initialization request message to a CPC AP; receiving a frequency initialization response message sent by the CPC AP, where the frequency initialization response message includes CPC private resource description information; broadcasting cognitive information of a base station and description information of an uplink access channel to a terminal over a channel specified in the CPC private resource description information; receiving cognitive information of the terminal over CPC private resources, deciding a work frequency according to the cognitive information of the terminal, and sending the decided work frequency to the terminal; establishing, on the decided work frequency, a link with the terminal.

Abstract: A method and apparatus for configuring a first cellular base station such as a femtocell to operate in a digital cellular telecommunications network includes: placing the first cellular base station in the digital cellular telecommunications network; detecting with a radio receiver at least one second operating cellular base station within the digital cellular telecommunications network; demodulating a first transmission of the at least one second cellular base station transmitter to obtain a first data stream; predictively modifying the first data stream to create a modified first data stream; correlating at least one periodic portion of the modified first data stream to form an enhanced data signal; decoding the enhanced data signal to obtain information; and configuring the first cellular base station with the information.

Abstract: A method for communication includes arranging multiple access points in a wireless local area network (WLAN) to communicate over the air with a station in a multiple-input multiple-output (MIMO) configuration. Transmission quality is measured, in alternation, between two or more of the access points and the station in a plurality of different MIMO states. Each MIMO state is characterized at least by a respective number of spatial streams to be transmitted in the state. Responsively to the measured transmission quality, one of the access points and one of the MIMO states are selected to transmit data to the station.

Abstract: Providing for a multipoint equalization (MPE) framework for coordinated multipoint (CoMP) transmission in wireless communication is described herein. The disclosed MPE framework involves distributed scheduling decisions for CoMP transmission, reducing complexity of scheduling coordination as compared with centralized scheduling techniques that coordinate scheduling decisions for multiple network base stations. Further, the MPE framework involves distributed computation of CoMP transmission coefficients, relying on a maximum of two backhaul hops to obtain information for the computation, and disseminate the transmission coefficients. The disclosed MPE framework shows substantial gains in various network deployments over conventional CoMP techniques.

Abstract: Example embodiments described herein are directed to systems and methods by which a group of base stations (BS) can configure pilot signals in time and time-frequency, using interference management resources (IMR) and/or channel state information reference signal (CSI-RS) resources, so that the user equipment (UE) such as mobiles and laptops can measure certain possible channel quality indicators (CQI) that correspond to specific channel and interference conditions that can arise during actual data submission. Using these values, example embodiments utilize an interpolation algorithm by which the group of base stations can estimate other possible CQI corresponding to a different set of channel and interference conditions.

Abstract: In a Coordinated Multipoint (CoMP) wireless network comprising a plurality of transmission points (TPs), a user equipment (UE) performs a method of determining aggregated channel quality information (CQI). The method includes receiving signals corresponding to a joint transmission from the plurality of TPs in the CoMP network. The method also includes making an assumption about a transmission scheme of the joint transmission from the TPs. The method further includes determining aggregated CQI corresponding to the joint transmission based on the assumption about the transmission scheme. The method still further includes transmitting the aggregated CQI to the network.

Abstract: A common group cell identifier is transmitted by adjacent base stations. Handover processing is minimized for mobile relays traveling along a predetermined path that traverses the adjacent base stations. A first base station along the path transmits a group cell identifier and a first single cell identifier within a first service area. An adjacent base station transmits the group cell identifier and a second single cell identifier within a second service area that at least partially overlaps the first service area. The mobile relay monitors the group cell identifier in certain situations and only performs a handover when the group cell identifier changes. As a result, no handovers are initiated as the mobile relay travels down the path since the group cell identifier transmitted by the base stations along the path are the same.

Abstract: Example embodiments described herein are directed to systems and methods by which a group of base stations (BS) can configure pilot signals in time and time-frequency, called channel state information reference signal (CSI-RS) resources, so that the user equipment (UE) such as mobiles and laptops can measure certain possible channel quality indicators (CQI) that correspond to specific channel and interference conditions that can arise during actual data submission. Using these values, example embodiments utilize an interpolation algorithm by which the group of base stations can estimate other possible CQI corresponding to a different set of channel and interference conditions.

Abstract: A method of managing registration requests from unauthorized user equipments in a cellular communications network includes monitoring such further registration requests and maintaining a count of the total number of registration requests from said user equipment. Based on the counted number of unsuccessful registration requests, different mechanisms can be used to reject the registration request.

Abstract: A method of managing cooperating set for a network in a wireless communication system supporting a technology of coordinated multipoint (CoMP) transmission/reception includes periodically updating a cooperating set of CoMP for a user equipment of the wireless communication system; wherein the cooperating set of CoMP represents a set of transmission points directly and/or indirectly participating in data transmission to the user equipment in the wireless communication system.

Abstract: A wireless communication method includes, at each base station, respectively forming first and second communication regions at the edges of a cell of the each base station by changing the direction of a directional antenna in synchronization with other surrounding base stations at a given cycle period, where each first communication region is configured so that a first level is reached in the antenna gain between the sectors contained in the cell of the each base station and the sectors included in the cells of the other base stations, and where each second communication region is configured so that a second level lower than the first level is reached in the antenna gain, and, at each mobile station, combining signals from a given number of base stations during a time period in which the sum of incoming signal levels from the given number of base stations satisfies given conditions.

Abstract: Multicarrier techniques for wireless communications system are described. An apparatus may comprise a carrier management module to define a primary carrier for use by a multicarrier communications system to communicate control information, and a secondary carrier for use by the multicarrier communications system to communicate media information, with the secondary carrier having a communication parameter and technology that is potentially different from the primary carrier. Other embodiments are described and claimed.

Abstract: A method is provided for transmitting/receiving data in a communication system. The method includes determining, when data to be transmitted to at least one Mobile Station (MS) is generated, a region where an MS that receive the generated data among the at least one MS is located, allocating resources of a data transmission region divided into a first region and a second region to the MS that receive the generated data according to the determination result, including the generated data in a region where the resource is allocated, and including, in a MAP message region, resource allocation information of the region where the data is included and information on an MS that receive the data included in the resource-allocated region, and transmitting, to the MS, a frame including the region in which the generated data is included, and the MAP message region.

Abstract: A method and apparatus for controlling power for uplink are provided. When a base station is moving or unable to communicate with others, at least one interference amount is estimated for a neighboring base station based on a path gain between a terminal and the neighboring base station and a transmission power of each encoding packet size and transmission format included in a candidate group related to scheduling transmission power parameters. A target interference amount is determined based on an interference amount control value and an initial target interference amount according to a processing load of a serving base station, and one interference amount is selected from estimated interference amounts based on the target interference amount. The terminal determines the transmission power based on an encoding packet size and a transmission format corresponding to the selected interference amount.

Abstract: A Channel State Information (CSI) transmission/reception method and an apparatus for transmitting/receiving CSI efficiently in a Coordinated Multi-Point (CoMP) communication system are provided. The CSI transmission method of a terminal for receiving Joint Transmission (JT) from a first Transmission Point (TP) and a second TP includes receiving a first CSI Reference Signal (CSI-RS) corresponding to the first TP, receiving a second CSI-RS corresponding to the second TP, generating an aggregated CSI corresponding to the first and second CSI-RSs, and transmitting the aggregated CSI, wherein generating an aggregated CSI comprising creating the aggregated CSI with a transmission timing of the aggregated CSI. The CSI transmission/reception method and apparatus is capable of transmission CSI efficiently in the CoMP system.

Abstract: Provided is a system for wireless communications including several base stations supporting a wide area wireless network and several mobile user equipment (UE) devices. Each mobile UE device may be configured to transmit a request to establish a local wireless connection with one or more of the UE devices. The mobile UE device may receive a response containing connectivity information from each of the mobile UE devices and then select one of the mobile UE devices based on the connectivity information received from each of the mobile UE devices. The mobile UE device may then establish a local wireless connection with the selected mobile UE device. The mobile UE device may then communicate with one of the base stations in the wide area wireless network through the selected mobile UE device, utilizing the local wireless connection.

Abstract: A smart antenna system is provided for communicating wireless signals between a mobile device and a plurality of different fixed base stations using different channels and different beams, said smart antenna system comprising a control subsystem, a radio transceiver and an antenna subsystem coupled to each other and adapted to perform scanning of different combinations of base stations, channels and beams using one or more test links established with one or more of said different fixed base stations, said one or more test links using at least some of the different channels and the different beams, select a first combination of base station, channel and beam based on the scanning, and establish a first operating link for transmitting a wireless signal to the selected base station using the selected channel and beam.

Abstract: A wireless access system comprises a base station and a control system. The base station wirelessly broadcasts a pilot signal including a network access provider identifier that identifies a wireless video service. The base station wirelessly receives a wireless video uplink request from a wireless video device in response to the pilot signal. The control system processes reservation data for the base station to determine if the wireless video device has a current wireless video uplink reservation and directs the base station to provide a wireless video uplink to the wireless video device if the wireless video device has the current wireless video uplink reservation. The base station wirelessly receives video data from the wireless video device over the wireless video uplink as directed by the control system.

Abstract: Base stations with coordinated multiple air-interface operations are provided. In some embodiments, multi-mode base station (BTS) systems operate with different air-interfaces, functionality, or configurations in a coordinated manner. For example, typical applications of such systems can include Macrocell BTS, Picocell BTS, Femtocell BTS, or Access Point (AP), Set Top Box (STB), or Home Gateway, Hot Spot Devices, User Terminal with the capability to perform required base station operations. In some embodiments, various techniques are provided for system improvements and optimizations via radio resource management, including user and system throughput optimization, QoS improvement, interference management, and various other improvements and optimizations. In some embodiments, a system (e.g.

Abstract: A communication system performing a coordinated multipoint transmission is provided. A mobile station may measure expected channel quality information when an interference of a serving base station does not exist. The serving base station may determine whether a neighbor base station and the serving base station are eligible to perform the coordinated multipoint transmission. The serving base station may determine whether the neighbor base station and the serving base station are eligible to perform the coordinated multipoint transmission using a criterion associated with an evaluation of an increase in a transmission rate of the mobile station.

Abstract: Disclosed are methods of executing a handover related operation in a power saving mode in accordance with handover triggering information. One of the methods of executing handover of a mobile station in a mobile communication system comprises determining an enabled status of at least one handover related operation in a specific operation mode between the mobile station (MS) and a network, receiving control information related to the at least one handover related operation from the network, entering the specific operation mode, changing the enabled status of the at least one handover related operation in the specific operation mode, and performing the enabled handover related operation in accordance with the changed enabled status and the control information.

Abstract: Methods of predicting future connectivity of a portable electronic device is described along with systems and devices for implementing the methods. The method includes receiving an indication of a plurality of radio scenes detected at the portable electronic device at different reference times. Each of the plurality of radio scenes identifies transmitters and associated signal strength of signals received by the portable electronic device at the respective reference time. One or more connectivity predictions can be retrieved from a corpus of pairs of a composite signature vector and associated connectivity information. Each of the one or more connectivity predictions can be retrieved based on a similarity between the associated respective composite signature vector and a query composite signature vector. A future connectivity prediction of the portable electronic device can be provided based on the one or more retrieved connectivity predictions.

Abstract: A method and system using inter-node interference data to improve the routing of data within a wireless mesh network.

Abstract: A radio communications system has at least one base station and subscriber station. To transmit messages to a subscriber stations, the base station uses successive emission directions that differ from one another. The base station transmits information concerning the sequence of the use of said emission directions to subscriber stations.

Abstract: Technologies are presented for an architecture and infrastructure for a scalable, very high bandwidth, wireless network that can accommodate arbitrarily high geographic concentrations of high-bandwidth users. The architecture may include a network of highly localized service areas that communicate with a central access point through a hierarchy of aggregate-and-relay stages. Communications may be mediated by a hybrid combination of ad-hoc and infrastructure-network features that are supported separately within the framework of a standardized system, for example in the 60 GHz (millimeter-wave) band.

Abstract: The present invention relates to a method and a communication network node for enabling automatic planning and handling of root sequences used at random access in a communication network system, wherein user equipments (18) are accessing a cell (19a) being served by said communication network node. Root sequence usage information from neighboring cells (19b, 19c) is acquired. Root sequence conflicts between root sequences used in said served cell (19a) and root sequences used in said neighboring cells (19b, 19c) are detected. When no conflict is detected, appropriate new root sequence(s) is/are selected. Otherwise, detected root sequence conflicts are resolved by deriving a new set of root sequences.

Abstract: Techniques for performing automatic gain control (AGC) at a terminal in a wireless communication network are described. In an aspect, the terminal may use different receiver gain settings to receive different types of signals in different time intervals. The terminal may determine a receiver gain setting for each signal type and may use the receiver gain setting to receive signals of that signal type. In another aspect, the terminal may determine a receiver gain setting for a future time interval based on received power levels for peer terminals expected to transmit in that time interval. The terminal may measure received power levels of signals received from a plurality of terminals. The terminal may determine a set of terminals expected to transmit in the future time interval and may determine the receiver gain setting for the future time interval based on the measured received power levels.

Abstract: Techniques for efficient signaling to and from a plurality of mobile stations are disclosed. In one embodiment, a subset of mobile stations may be allocated a portion of the shared resource with one or more individual access grants, another subset may be allocated a portion of the shared resource with a single common grant, and yet another subset may be allowed to use a portion of the shared resource without any grant. In another embodiment, an acknowledge and continue command is used to extend all or a subset of the previous grants without the need for additional requests and grants, and their associated overhead. In one embodiment, a traffic to pilot ratio (T/P) is used to allocate a portion of the shared resource, allowing a mobile station flexibility in selecting its transmission format based on T/P.

Abstract: In a mobile communication system, which has a plurality of radio network controllers and a number of radio base stations connected to each of the radio network controllers, for sending and receiving user data between a host network and mobile stations via the radio network controllers and radio base stations, a plurality of transmission paths that pass through one or more radio network controllers are set up between a base station, which sends and receives radio signals to and from a mobile station, and the host network. When data is being sent and received using one transmission path from the host network to a base station through a radio network controller, traffic conditions on this transmission path are monitored. When traffic has increased, the user data is dispersed by being passed through a plurality of transmission paths.

Abstract: A methodology and system for performing radio network coverage surveys of multiple site candidates concurrently using one reserved channel based on reverse path signal strength measurements of a signal from a test mobile station transmitter (100) to a plurality of prospective base station receiver sites (200, 200?, . . . ) over a geographical area is presented. The instantaneous position, time-stamp and power of the Transmitter (101) is recorded and stored as it moves along a test route(s). Stationary Test Receiver(s) (201) tuned to the selected channel at each prospective site location (200, 200?, . . . ) save received instantaneous signal strength and, it's time-stamp so they can matched up to the position of the Test Transmitter (101) and used to ascertain received signal strength at each site. Results can be useful for ascertaining optimum site locations, antenna configurations, propagation model tuning, frequency planning, pilot planning and extraction of signal correlation statistics.

Abstract: To transmit notification indicators for broadcast and multicast services, a base station maps the services to random sequences based on their identifiers. The base station generates the random sequence for each service based on a hash function or a PN generator and the service identifier. Each random sequence is associated with a specific location for sending a notification indicator in each frame. The locations for the notification indicators for each random sequence are randomized with respect to the locations for the notification indicators for each remaining random sequence. This randomness characteristic reduces the likelihood of false alarm. For each service, the base station sets the notification indicators to the same notification value in each modification period. The base station transmits the notification indicators for each service at the random locations determined by the random sequence for the service.

Abstract: The present invention is to enable reduction of constraint brought by generation of ID codes of reference signals to be used for cooperative reception and the allocation of the reference signals when radio communication is carried out between a plurality of base station apparatuses and a terminal unit. Terminal units UE201 to UE205 are terminal units existing in the cellular zone of a base station apparatus BS200 and are performing communication with base station apparatus UE200. When terminal unit UE201 is located at the edge of cell and its reception characteristic degrades, another base station apparatus, specifically, base station apparatus BS100 also performs cooperative transmission while terminal unit UE201 performs cooperative reception.