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Method for optimizing time division multiplexing frame structure parameters, communication method, system and terminal

A technology of structural parameters and optimization methods, applied in the field of communication, can solve problems such as performance degradation, small multipath delay expansion, wireless channel frequency selectivity and time selectivity degradation, etc., to improve performance, optimize frame structure parameters, shorten Effect of Feedback Latency

Active Publication Date: 2013-04-10
DATANG MOBILE COMM EQUIP CO LTD
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Problems solved by technology

The basic characteristics of the hotspots mentioned above are that the multipath delay spread is small, and the mobile speed of the terminal is very low.
[0005] The above LTE parameters are designed for the TU channel environment. In the TU channel, a better compromise between performance and overhead can be obtained, but if such a pilot structure is used in other scenarios, it will cause performance degradation or unnecessary s expenses
For example, in hotspot areas, the frequency selectivity and time selectivity of wireless channels will decrease significantly.

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  • Method for optimizing time division multiplexing frame structure parameters, communication method, system and terminal
  • Method for optimizing time division multiplexing frame structure parameters, communication method, system and terminal
  • Method for optimizing time division multiplexing frame structure parameters, communication method, system and terminal

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[0029] In order to enable those skilled in the art to better understand the present invention, the method of the present invention will be described in detail below in conjunction with the drawings and specific embodiments.

[0030] The user requirements in hotspot areas are mainly large bandwidth, high speed, and small feedback delay; the mobile speed of the terminal is very low, mainly for fixed and nomadic scenarios; the coverage area of ​​hotspot areas is small, and the multipath delay expansion is small, so the two The mutual interference between hotspots is relatively light.

[0031] The time division multiplexing frame structure parameter optimization method of the embodiment of the present invention, aiming at the characteristics of the above-mentioned hot spots, does not change the TDD frame structure of the LTE communication system, and introduces a guard interval GP after the time slot or subframe by shortening the CP length of the OFDM symbol , that is, the number ...

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Abstract

The invention discloses a method for optimizing time division multiplexing frame structure parameters, which comprises the following steps: shortening the length of cyclic prefixes of orthogonal frequency division multiplexing OFDM symbols of subframes; and at the same time, adding protective guard periods GP behind time slots or the subframes, wherein the total length of the added GP is equal tothe total length of the shortened CP. The invention also provides a communication method, a system and terminals. The method for optimizing time division multiplexing frame structure parameters of theinvention can reasonably configure system parameters according to usage contexts and effectively improve system performance.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a time division multiplexing frame structure parameter optimization method, a communication method, a system and a terminal. Background technique [0002] Broadband wireless communication will become the main development direction of mobile communication in the future. Through broadband wireless communication, users can enjoy many wireless mobile services such as high-speed data download, online shopping, mobile video chat, and mobile TV. [0003] The next-generation broadband wireless communication system LTE (Long Term Evolution, long-term evolution) system supports FDD (Frequency Division Duplex, frequency division multiplexing) and TDD (Time Division Duplex, time division multiplexing) two modes. In the LTE TDD system, OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) technology is adopted. In order to avoid inter-symbol inter...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04B7/26
Inventor 于洋孙韶辉王映民毕海
Owner DATANG MOBILE COMM EQUIP CO LTD