Abstract: In one of many possible implementations, an exemplary method comprises maintaining a baseline data structure comprising a plurality of baseline data records and a base set of relationships between the baseline data records, providing, for access by an external party, a customizable data structure comprising copies of the baseline data records and a customizable set of relationships between the copies of the baseline data records, fixing the base set of relationships in the baseline data structure to be unchangeable by the external party, and defining the customizable set of relationships in the customizable data structure to be changeable by the external party. Corresponding systems and methods are also disclosed.

Abstract: A multiuser downlink multiple-input multiple-output (MIMO) system with limited channel information feedback includes an error-free channel vector quantization scheme. Each user has multiple antennas, and the base station includes a matching number of antennas. Each MIMO channel is measured at the terminus end of a corresponding user, and used to obtain the channel state information at the receiver (CSIR). A few data bits of CSIR information are feed back to the base station through the limited feedback channels. The base station collects all these CSIR feedback data bits into a CSI at the transmitter (CSIT). The CSIT is used to determine which users are served, and how to configure a corresponding multi-user precoder. The user data channels will later all be transmitted through such precoder. A codebook of channel quantization vectors is pre-defined and distributed amongst the base station and all the users.

Abstract: In one of many possible implementations, an exemplary system includes a data integration subsystem configured to maintain a baseline data structure representing a base set of data relationships. The data integration subsystem in further configure to maintain a mapping of the baseline data structure to local data maintained by a plurality of local data subsystems. The system further includes a portal subsystem configured to provide a first customizable data structure associated with the baseline data structure for user access, create a copy of at least a subset of the baseline data structure, and provide a second customizable data structure associated with the copy of the baseline data structure for user access. The first and second customizable data structures are independently customizable to represent different custom sets of data relationships.

Abstract: A method and system for controlling network access are provided. The method comprises following steps: S102, gateway equipment establishes a general network connection to network management equipment; S104, the gateway equipment receives from the network management equipment the parameter information of the service type applied by the gateway equipment, and based on the parameter information, the gateway equipment establishes a network connection which is leading to the network management equipment and matched to the service type applied by the gateway equipment on the basis of the general network connection; and S106, the gateway equipment controls to select the general network connection or the network connection matched to the service type applied by the gateway equipment based on the user type, so as to carry out the network access control. The present invention realizes the network access control, and at same time solves the problem that multiple users log on the network.

Abstract: An exemplary system includes a plurality of heterogeneous data subsystems maintaining local data and a coordinator subsystem configured to maintain global data mapped from the local data, the global data including a plurality of global data relationship views. One of the heterogeneous data subsystems is configured to initiate a data conversion of at least one local data record included in the local data from an origin data schema to a target data schema and to provide at least one data update message representative of the data conversion to the coordinator subsystem. The coordinator subsystem is configured to receive the data update message and asynchronously propagate the data conversion through to at least a subset of the global relationship views in the global data.

Abstract: To optimize the selection of pre-coding vectors in a multi-user MIMO system, the present invention provides a method for selecting pre-coding vectors in a base station, comprising the steps of: transmitting a plurality of pilot signals without being precoded to the plurality of terminals; receiving a plurality of feedback signals from the plurality of terminals, wherein at least one feedback signal includes a plurality of recommended pre-coding vector information and a plurality of channel status information, and each of the channel status information corresponds to a recommended pre-coding vector information; generate a pre-coding codebook based on the plurality feedback signals, wherein at least one pre-coding vector in the pre-coding codebook is determined based on a correlation coefficient between at least two recommended pre-coding vectors; and performing a transmission operation using the pre-coding codebook.

Abstract: In one of many possible implementations, an exemplary system includes a data integration subsystem configured to maintain a baseline data structure representing a base set of data relationships. The data integration subsystem in further configure to maintain a mapping of the baseline data structure to local data maintained by a plurality of local data subsystems. The system further includes a portal subsystem configured to provide a first customizable data structure associated with the baseline data structure for user access, create a copy of at least a subset of the baseline data structure, and provide a second customizable data structure associated with the copy of the baseline data structure for user access. The first and second customizable data structures are independently customizable to represent different custom sets of data relationships.

Abstract: An exemplary system includes a plurality of heterogeneous data subsystems maintaining local data and a coordinator subsystem configured to maintain global data mapped from the local data. The coordinator subsystem includes a global data life cycle model defining at least one life cycle for the global data. The coordinator subsystem is configured to use the global data life cycle model to coordinate a data update between the global data and the local data. In certain implementations, the coordinator subsystem and the heterogeneous data subsystems are configured to communicate using at least one data update message representative of the data update, the data update message being defined in accordance with the global data life cycle model. In certain implementations, the data update message includes a life cycle status identifier associated with the data update.

Abstract: An exemplary system includes a plurality of heterogeneous data subsystems maintaining local data and a coordinator subsystem configured to maintain global data mapped from the local data, the global data including a plurality of global data relationship views. One of the heterogeneous data subsystems is configured to initiate a data conversion of at least one local data record included in the local data from an origin data schema to a target data schema and to provide at least one data update message representative of the data conversion to the coordinator subsystem. The coordinator subsystem is configured to receive the data update message and asynchronously propagate the data conversion through to at least a subset of the global relationship views in the global data.

Abstract: An application portal selectively provides a user selective access to data. A data access layer is included in the portal and includes a map associating the user with a permission and further associating a combination of the user and the permission with a data entity, whereby it may be determined whether the user is permitted to access data identified with the data entity. A data stage included in the portal selectively undergoes a synchronization with a remote data store, the synchronization providing data access information that is used to update the map.