Abstract: The present invention discloses an enhanced base station, which includes a Um interface functional module (1), a base station functional module (2), a controller functional module (3), and an A interface functional module (4), wherein the Um interface functional module (1), the base station functional module (2) and the A interface functional module (4) carry out the function of a BTS, and the controller functional module (3) and the A interface functional module (4) carry out the function of a BSC. The present invention also provides a method and a GSM system for realizing a flat mobile communication, wherein the enhanced base station carries out the functions of a BTS and a BSC in a conventional GSM system. Application of the present invention can decrease the number of devices for constituting the GSM system and the number of forwarding devices between a calling MS and a called MS, therefore reduce the time for service data transmission and improve the reliability of the transmission.

Abstract: The present invention provides a method of terminal PTT registration based on CDMA trunking system and the system thereof, comprising: a user terminal is powered and a normal CDMA registration flow is completed, and afterwards the value of a PTT registration message counter is initialized; the user terminal sends a PTT registration message to a dispatching sub-system (server) and starts a PTT registration timer; and a corresponding process is performed according to the response message from the dispatching server, which is the reception of the trunking registration or the rejection of the trunking registration. Therefore the terminal with CDMA trunking function can avoid the problem caused by a failed PTT registration.

Abstract: A system for playing a color ring back tone (CRBT) based on a user's state presence information including the network element devices of: a HLR, a calling user's MSC/VLR, a called user's MSC/VLR, a CRBT control server, and a state presence server. A method for playing a CRBT based on a user's state presence information includes: providing a state presence server in a communication system which includes a CRBT control server; establishing a physical connection channel, and defining an information interface between the CRBT control server and the state presence server; the CRBT control server obtaining the called user's current state information by exchanging information through the information interface; and the CRBT control server playing a corresponding CRBT based on the current state information of the called user and corresponding subscription information of the color ring back tone service when the user is called.

Abstract: The present invention discloses an electronic service guide multiplex transmission interface method comprising: Step S102 in which an electronic service guide system generates electronic service guide broadcasting data according to system configuration data and the electronic service guide broadcasting data is sent to a multiplexer via a interface; the step S104 in which the multiplexer receives and multiplexes the electronic service guide broadcasting data and the multiplexed electronic service guide broadcasting data is transmitted to a modulation emitter; step S106 in which the modulation emitter receives the multiplexed electronic service guide broadcasting data, modulates the data and transmits the modulated data to user terminal; and step S108 in which the user terminal is tuned to receive the electronic service guide broadcasting data and demultiplexes it, and generates, stores and displays electronic service guide service navigation information.

Abstract: The Field Testing Instrument (FTI) is designed for use in the regular maintenance and installation of airport Precision Approach Path Indicator (PAPI). The FTI is a self-contained and portable instrument that accurately measures the most important PAPI parameters, such as vertical aiming angle, transition angle, and light intensity. In addition to working with the current incandescent PAPIs, the FTI also measures parameters specific to the next generation LED PAPI. The FTI uses modern, efficient technology to reduce the life-cycle cost of approach lighting systems. The FTI improves on traditional PAPI testing methods by directly measuring the PAPI light beam focused to a target plate, as if seen from the pilot perspective. Due to significantly improvements in measurement accuracy and reliability, the FTI may supplement and even replace costly flight checks for PAPI maintenance with ground based operation.