Method and apparatus for transmitting frequency-division duplexing frame compatible with time division duplexing system
A technology of time slot and adjacent frequency coexistence, applied in transmission systems, multi-frequency code systems, radio transmission systems, etc., can solve the problems of base station and terminal uplink and downlink interference, small coverage, etc., to ensure compatibility, solve uplink and downlink problems Interference, the effect of extending coverage
Inactive Publication Date: 2009-03-25
HUAWEI TECH CO LTD
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[0014] In view of this, the object of the present invention is to provide a method and device for sending FDD frames compatible with the TDD system, so as to overcome the disadvantages caused by the existing TDD frame structure that only co-locates with TD-SCDMA. The coverage area is small, and the uplink and downlink interference problems between the base station and the terminal
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[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0031] Such as image 3 As shown, it is a flowchart of an embodiment of the method for sending an FDD frame compatible with a TDD system in the present invention, which specifically includes the following steps:
[0032] Step 301: Perform IFFT on the data sampled in the same way as TDD to obtain signals of OFDM symbols; the above-mentioned TDD system is an adjacent-frequency coexistence system co-located with the TD-SCDMA system.
[0033] In the TDD system, t...
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The embodiment of the invention provides a method for sending an FDD (Frequency Division Duplex) frame compatible with a TDD (Time Division Duplex) system, which comprises the following steps: carrying out the fast Fourier transform inverse to the data sampled in the same manner as the TDD to acquire a signal of an OFDM (Orthogonal Frequency Division Multiplex) symbol, wherein the TDD system is an adjacent-channel coexisting system co-located with a TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) system; carrying out the CP (Content Provider) adding processing to the OFDM symbol in the signal; and further sending the acquired OFDM symbol in at least one time slot of a downlink frame, wherein the length of the downlink frame is the same as that of a frame in the TDD system. The embodiment of the invention further provides a sending device, ensures the compatibility with the TDD system, enlarges the coverage area and solves the problem of the uplink and downlink interference of the base station and the terminal by taking the advantage of FDD, meanwhile, the technical proposal provided by the embodiment of the invention is applicable in a B3G / 4G system, and forms an integrated system with the TDD.
Description
technical field [0001] The present invention relates to the technical field of wireless communication, and in particular to a method and a device for sending a Frequency Division Duplex (FDD) frame compatible with a Time Division Duplex (TDD) system. Background technique [0002] In recent years, the third generation mobile communication system (The 3rd Generation Mobile Communication, 3G) technology has developed rapidly, and my country's own standard Time Division Synchronous Code Division Multiple Access (TD-SCDMA) technology Commercial use is about to begin. Operators need to arrange TD-SCDMA equipment on the frequency stipulated by the state, including site selection, installation of antennas, base stations, etc. The next-generation mobile communication system of TD-SCDMA, that is, Beyond 3G (B3G) / 4th Generation Mobile Communication (The 4th Generation Mobile Communication, 4G) system, needs to use the existing site to operate on the frequency specified by the state. W...
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IPC IPC(8): H04B7/204H04L5/06H04L27/26
Inventor 唐臻飞李江
Owner HUAWEI TECH CO LTD