302 results about "Femto base stations" patented technology

The described technology generally relates to method(s) and arrangement(s) for access control during relocation of a user equipment (UE) into a femto base station (FBS) and dynamic triggering of the relocation into the FBS. A white list is maintained in the UE. The white list includes information on a list of FBSs that the UE is allowed to relocate. The UE detects a target FBS and reports target FBS to a source macro base station (MBS). The source MBS makes a relocation request to a mobility controller. The mobility controller grants or denies the requests or allows the target FBS to make the decision. Upon grant, the UE is relocated to the target FBS. Otherwise, the white list is updated in the UE.

A wireless communication system and handover method for the wireless communication system are provided. A handover method for a wireless communication system including a plurality of femto cells and at least one macro cell within which the femto cells are disposed includes determining, at a Radio Network Controller (RNC), a handover of a terminal to a femto base station based on a measurement report of the terminal and preset handover parameters, sending a radio link setup request message to a femto base station gateway, the radio link setup request message including a uplink scrambling code and an International Mobile Subscriber Identity (IMSI) of the terminal and a Logical Cell Identifier (LCID) of femto base stations reusing frequency of a macro base station, searching, at the femto base station gateway, for femto base stations of which LCIDs match the LCID contained in the radio link setup request message, and performing, when only one LCID-matched femto base station is discovered, the handover of the terminal to the LCID-matched femto base station.

A system and method for determining the location of a re-deployable base station is disclosed. The disclosed system and method allow for accurate determination of the location of a re-deployable base station, such as a femto base station (FBS), using position information obtained from a mobile station (MS) that is communicating with the FBS being located. The position information can include the location of the mobile device as estimated using one or more satellite positioning systems or cellular network based positioning systems. The position information can also include data identifying pilots from base stations and/or other FBS's that the MS is receiving. A determination of the propagation loss between the MS and the FBS is used to estimate the distance between the mobile device and the FBS. The location of the FBS is determined based on the received position information and the determined distance between the MS and the FBS.

The apparatus, signaling method, and tangible machine-readable medium thereof for time synchronization procedure in a cellular network are provided, wherein the network comprising a plurality of femto base stations and relay stations. The source of providing time synchronization information to femto base stations and relay station could be macro base station, femto base station, relay station or mobile station. The apparatus comprises a clock module, a receiving module, a transmission module, and a determination module. The clock module is configured to generate clocks to synchronize with the network. According to the source of providing time synchronization information to femto base stations and relay stations, the receiving module is configured to receive the system synchronization and access information, or the ranging messages including the ranging request and ranging response messages, the transmission module is configured to transmit the system synchronization and access information, or the ranging messages including the ranging request and ranging response messages. The determination module is configured to determine the timing with respect to the system clock.

Techniques to permit scheduling of mixed radio access technologies. In some cases, a first radio access technology mode of a base station is scheduled during a first time region and a second radio access technology mode of a base station is scheduled during a sleep mode of the first radio access technology mode. In some cases, a first radio access technology mode of a base station is scheduled during a first time region and a second radio access technology mode of a base station is scheduled during an unused portion of the first time region. In some cases, a femto-base station is scheduled to snoop for local mobile stations during a sleep mode. Inactive regions of mobile stations are scheduled during a portion of sleep modes of the radio access technology modes.

Systems and methods are disclosed that provide femto-based wireless coverage in a communication network. This can involve providing an interworking function that communications with a femto base station or femto cell to provide connectivity to the core network. The interworking function can provide service and mobility management where a femto cell (such as a home node B (HNB)) is served concurrently by an IMS core and a legacy core. The interworking function can also provide service through a femto cell to a variety of mobile nodes such as legacy devices and IMS capable devices. The interworking function also provides the ability for handoffs to occur between the core networks and between a femto cell and a macro cell.

A subscriber station can efficiently determine an accessible base station by scanning a subset of base stations based on an optimized list received from a serving base station. The subscriber station includes a white list that contains information regarding a number of closed subscriber group (CSG) base stations to which the subscriber station is subscribed. The subscriber station can transmit a request message that includes one or more of: indication of whether the detected identifier of the femto base station is in the whitelist or not; and its location information. In response, the base station can send a message that includes the nearby femtocells and whether the femtocell is accessible or inaccessible to the subscriber station. The femto base station can be designed to be in transmission off mode when none of its subscribers is in its coverage. The serving base station can select a set of the accessible femtocells to the subscriber station, and request the selected femtocells to monitor an uplink signaling of the subscriber station so that the femtocell can be awaken when the femtocell is in transmission off mode or be aware that the subscriber station is in proximity, if the uplink signaling is detected.

The invention discloses an interference suppression method of a hybrid network of macrocell and Femtocell. The method comprises the following steps: the Femtocell in a certain range is clustered; the transmission power of the femto base station in the cluster; the clustering situation of the Femtocell is adjusted; the Femtocell in an interference sensitive area is clustered; for the Femtocell of the clustered interference sensitive area, the transmission power of the femto base station in the cluster is controlled by using the cluster as unit; the clustering situation of the Femtocell in the interference sensitive area is adjusted, the Femtocell cluster in the interference sensitive area is determined; the micro user equipment is divided into a dead zone user equipment and a non-dead zoneuser equipment; spectrum resources are divided into three nonoverlapping parts; and the spectrum resources are distributed for the Femtocell in the interference sensitive area, the dead zone user equipment, the Femtocell in the non-interference sensitive area and the non-dead zone user equipment. By adopting the method of the invention, the spectrum utilization efficiency and system capacity of the overlapped double-layer network of the macrocell and the Femtocell, and the problems of the cross-layer interference between the macrocell and the Femtocell and the same-layer interference of the Femtocell can be effectively solved.

According to an embodiment, an apparatus such as a femto base station may include a transmitter to send via a local network an information to a mobile network for informing on an active state of apparatus. The apparatus may be configured to send the information when being switched on, or on a periodical or repeated basis in a switched-on state of the apparatus. A macro base station may add the femto base station to a network configuration list. Respective methods are also provided.

A core network architecture for supporting an internet protocol based network is disclosed. The system includes a base station which is configured to convert a signal from a first network to an internet protocol network signal and send the converted signal through the internet protocol base network. The network also includes a gateway which is configured to receive the converted signal and deploy the converted signal through the internet protocol base network. In this sense, the internet protocol base network manages the call mobility and delivery of the signal. The base station in this disclosure may be a femto base station and the first network may be a code division multi-access (CDMA) network.

Provided are a paging method and an apparatus thereof for User Equipment (UE) in a broadband wireless communication system. In the method, a paging message is received from a macro base station. Whether there exists an accessible femto base station inside a service area of the macro base station is determined. When there does not exist the accessible femto base station inside the service area of the macro base station, the UE responds to the paging message of the macro base station. When there exists the accessible femto base station inside the service area of the macro base station, the UE waits for a paging message to be received from the femto base station.

A method and an apparatus for transmitting and receiving System Information (SI) of a femto base station in a wireless communication system are provided. In the method, an SI transmission point is determined using unique identification information of a femto base station itself and unique identification information of a macro base station with which the femto base station is associated. Each of user equipment and the macro base station generate a measurement gap pattern representing an SI reception point using the unique identification information of the femto base station and the unique identification information of the macro base station. SI is received from the femto base station according to the generated measurement gap pattern.

A method and an apparatus for controlling transmitter power of a femto base station in a broadband wireless communication system are provided. In the method, a femto base station receives a signal having an intensity of a threshold or more from UE and transmits a message reporting power-on of a transmitter to a femto base station controller. The UE transmits a message reporting downlink signal measurement results of femto base stations to the femto base station controller via a macro base station. The femto base station controller determines a femto base station which becomes a handover target of the UE using report messages of the femto base stations and the UE. The femto base station controller transmits a handover procedure start message to the macro base station and the determined femto base station.

A femto base station registers IDs of neighboring macro base stations and the ID of a terminal into a management device. When the femto base station detects that the communication state of a terminal in communication with the femto base station transited from active to idle, the femto base station hands off the communication session to one of the neighboring macro stations and enters the dormant state. When the macro base station detects that the communication state of the terminal transited from idle to active, the macro base station transmits an inquiry to the management device, identifies a femto base station to be started based on the terminal ID and the macro base station ID and starts the femto base station. When the femto base station is started, it is handed off from the macro base station to the femto base station to maintain the communication session of the terminal.

A method of providing location information to a network application, a location server, a method of providing a trigger notification, a femto base station and a computer program product are disclosed. The method comprises the steps of: receiving details of a triggering event which is to be notified to the network application, the triggering event being a registration of user equipment with a predetermined femto cell of the wireless telecommunications network; providing triggering information indicative of the triggering event to that femto base station providing wireless communications coverage to the predetermined femto cell to cause that femto base station to provide a trigger notification indicating when the triggering event occurs; and in response to receipt of the trigger notification from the femto base station, providing location information to the network application, the location information providing the network application with an indication of the user equipment Femtocell and the predetermined femto cell, together with an indication of when the triggering event occurred. This enables the movement of user equipment into specific locations to be detected and provided to network application efficiently, without any subsequent location determination processing having to occur, which provides a low-power, scalable, accurate and non- invasive approach requiring no modification of user equipment.

A method of performing a handover in a wireless communication system employing a macro base station and a femto base station is provided. The method comprising: monitoring an uplink signal transmitted from a user equipment to the macro base station; transmitting a handover initiation message to the macro base station on the basis of a result of comparing the uplink signal's strength obtained by the monitoring with a reference value; and performing a handover of the user equipment from the macro base station to the femto base station. According to the present invention, there is provided a method of initiating a handover by a femto base station by fining user equipments located in a cell coverage of the femto base station. In addition, a signaling overhead is reduced by utilizing previously existing information such as uplink transmit power.

Provided are a method and an apparatus for releasing a blank zone by a macro base station in a wireless communication system. The macro base station: receives channel information from a macro terminal that is serviced therefrom; determines based on the channel information whether or not a downlink blank zone allocated to a resource zone of a femto bas station is released; and transmits downlink blank zone release information to the femto base station if the downlink blank zone is supposed to be released. The downlink blank zone is a resource zone which restricts the downlink transmission, among all the resource zones used by the femto base station. The channel information may be the information about the distance between the femto base station and the macro terminal.

A mobile station capable of accessing a wireless network comprising a plurality of macro-base stations and a plurality of femto-base stations. The mobile station comprises: 1) a transceiver that communicates with the macro-base stations and femto-base stations; 2) a message processor coupled to the transceiver; and 3) a memory coupled to the message processor that stores a white list of CSGID values associated with at least one closed subscription group to which the mobile station subscribes. The message processor transmits to a first macro-base station a first control message that contains at least one CSGID value from the white list. The message processor receives from the first macro-base station a second control message that contains the information of at least one femto-base station (FBS) identifier associated with the at least one CSGID value. The mobile station uses the information of the at least one FBS identifier to access a first femto-base station associated with the at least one FBS identifier.

A method for initialization of a remote femto base station by a remote management system in a radio access network, the method comprising: powering on the femto base station; transmitting an initial configuration file from the remote management system to the femto base station; initializing the femto base station with the initial configuration file; scanning neighbor femto base stations; transmitting the results of the scanning of neighbor femto base stations and transmitting the femto base station location information to the remote management system; the remote management system setting a neighbor list and radio frequency parameters in response to receipt of the transmission from the femto base station; generating an updated configuration file based on the generated neighbor list and radio frequency parameters; transmitting the updated configuration file to the femto base station; and applying the updated configuration file at the femto base station and starting operation.

A power control system and method to mitigate interference in a heterogeneous network is provided. A power control method to mitigate interference may include: receiving a link connection request from a femto terminal; transmitting a downlink signal when the link connection request is allowed; receiving information of a macro terminal present around a femto base station; controlling a power of the downlink signal in response to a high interference indicator (HII) report being included in the received information of the macro terminal; and controlling the power of the downlink signal based on a priority of service while satisfying predetermined constraints, in response to the HII report in a state in which the power of the downlink signal is decreased up to a predetermined required power.

Regardless of use of small resource in donor (macro) base station, high throughput in relay femto base station is provided. The relay femto base station transfers data of a C-plane communicated between a core network and a mobile station through the donor macro base station by a radio link, and transfers data of a U-plane through an internet by a wired public line. The relay femto base station measures an interfered power from a neighboring relay femto base station, and notifies the donor macro base station of the measured interfered power, and the donor macro base station adjusts radio packet scheduling so as to prevent interference between the relay femto base stations on the basis of a notified measurement value of the interfered power.