Abstract: A transmission method for multi-antenna retransmission is provided, comprising steps of: generating the bits to be transmitted by respective antennas; mapping the bits to be transmitted by the respective antennas into symbols; and multiplying by a constant the vector constituted by the mapped symbols transmitted by multiple antennas, wherein the resulting vector is orthogonal to the matrix constituted by the symbols previously transmitted by multiple antennas, and transmitting the orthogonal symbols. According to the method of the present invention, the remapped symbols transmitted by the respective antennas and the symbols previously transmitted by the respective antennas constitute a matrix that has an orthogonal property. The orthogonal property can be used to effectively detect signals. In addition, the method has a reception algorithm with low complexity and brings about significant performance gains over conventional methods.

Abstract: This invention provides a method, system and device for positioning a mobile terminal. The method includes: instructing, by a serving base station or an upper level relay, measuring a transmission time of a positioning signal with the mobile terminal, and instructing two relays in a serving cell to measure the transmission time of the positioning signal with the mobile terminal; and calculating, by the serving base station or the upper level relay, a position of the mobile terminal according to the transmission time of the positioning signal, the position of the serving base station or the upper level relay and the position of the two relays. The method, system and device provided by the present invention can reduce communication overhead in mobile terminal positioning, and improve the positioning accuracy of mobile terminal positioning.

Abstract: A method and an apparatus for performing carrier switching in a wireless communication system using multi-carriers are provided. According to the method, a Mobile Station (MS) transmits a message including information on a time slot occupying status to a Base Station (BS), if a message for instructing to report the information on the time slot occupying status, is received from the BS, receives, from the BS, first information on at least one time slot scheduled by using the information on the time slot occupying status, identifies at least one time slot using the first information, and performs the carrier switching in the identified at least one time slot.

Abstract: An application method of a Location Based Service-zone (LBS-zone) is capable of implementing instruction and measurement for the LBS-zone. The method includes sending, by a serving Base Station (BS) located by a Mobile Station (MS), an instruction message indicating an LBS-zone exists, to the MS. The method also includes, when the LBS-zone exists, and the MS measures a reference signal sent by a neighbor BS in the LBS-zone, receiving, by the MS, the reference signal in the LBS-zone, which is sent by the neighbor BS and used for locating the MS, according to the instruction message. The method also includes measuring, by the MS, the reference signal, and sending a measurement result to the serving BS. Using embodiments of the invention, the MS may be enabled to obtain information of the LBS-zone accurately, so as to implement normal measurement for the LBS-zone and measurement result feedback.

Abstract: A method for positioning a Mobile Station (MS) is provided. The method includes transmitting, by a serving base station of a MS, indication information of a Location Based Services (LBS) zone to the MS receiving, by the MS according to the indication information, a reference signal used for positioning the MS in the LBS zone from a base station of a neighboring cell, wherein the LBS zone is multiplexed with a control information field in N downlink subframes, or with the control information field and a data field in the N downlink subframes, and wherein N is larger than or equal to 1. In the case of restraining interference of a serving cell signal to a neighboring cell signal, the requirements of system resource allocation and Hybrid Automatic Repeat Request (HARQ) timing synchronization can also be satisfied.

Abstract: A method of implementing the location includes determining the base stations participating in the location and parameters required in the location via the signaling interaction between a mobile station and a serving base station. Afterwards, the mobile station and the base stations participating in the location perform the location measuring according to the determined parameters required in the location; at last, performing the location calculation according to the measuring result of location measuring.

Abstract: The method for multiple TDD systems coexistence comprising steps of: a newly deployed system calculating a relative time offset ?t for a corresponding frame; the newly deployed system transmitting uplink and downlink signals based on a time reference information obtained by a summation of the relative time offset ?t and a time reference of an existing system. With the method proposed in present invention, uplink and downlink interference from adjacent frequency bands and from adjacent carriers in the same frequency band can be greatly reduced and a transmission time utility can be guaranteed for a newly deployed system.

Abstract: A pre-coding/decoding method and apparatus for data transmission between a transmitting end and a receiving end is provided. The pre-coding method for data transmission through Time Division Duplexing (TDD) in a mobile communication system includes estimating downlink channel state information based on an uplink sounding signal, and pre-coding a data symbol and a reference signal based on the estimated downlink channel state information.

Abstract: Provided is a power control apparatus and method of a time division duplex (TDD) communication system. The power control apparatus includes an uplink power determiner for determining an uplink power value using a power control computation element of a current frame, which is acquired using a power control computation element of a prior frame and a power increase/decrease change estimated from a downlink, and a cell interference received from a base transceiver station (BTS); and an uplink power controller for controlling an uplink power by sending the uplink power value from the uplink power determiner to a transmitter.