Distance measuring signal transmitting method, system and apparatus in OFDM system

An orthogonal frequency division and signal transmission technology, which is applied in multi-frequency code systems, transmission systems, selection devices, etc., and can solve problems such as the lack of flexibility of the Ranging channel resource allocation mechanism and the impact of normal user access.

Active Publication Date: 2008-12-31
XFUSION DIGITAL TECH CO LTD
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Problems solved by technology

[0013] Embodiments of the present invention provide a method, system and device for transmitting ranging signals in an OFDM system, which are used to so

Method used

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  • Distance measuring signal transmitting method, system and apparatus in OFDM system
  • Distance measuring signal transmitting method, system and apparatus in OFDM system
  • Distance measuring signal transmitting method, system and apparatus in OFDM system

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Embodiment Construction

[0036] see Figure 4 A method for sending a Ranging signal in an OFDMA system provided by an embodiment of the present invention includes the following steps:

[0037] Step 401: Allocate a ranging channel resource block for each area of ​​the base station cell in the uplink subframe interval, reserve a guard time in each allocated ranging channel resource block, and reserve a setting for each ranging channel resource block Transmission opportunity size;

[0038] Here, the cell of the base station may include one or more areas, such as a central area and an edge area. The transmission opportunity size is a time size, for example, 4 OFDMA symbols.

[0039] Step 402: The terminal determines the area where it is located according to the current signal receiving strength, and sends a Ranging signal to the base station by using the time resource of the transmission opportunity size in the ranging channel resource block allocated for the area except the guard time;

[0040] Step 4...

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PUM

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Abstract

An embodiment of the invention discloses a method of range signal transmission in an orthogonal frequency division multiplexing system, comprising that: a district of a base station includes at least two areas, and each area is provided with a distance range channel time resource block in an upstream sub-frame section, and guard time is obligated in each distance range channel time resource block. A terminal determines oneself area according to the receiving intensity of the current signal, transmits the range signal to the base station through the time resource beside the guard time in the range channel time resource block distributed for the area. The embodiment of the invention also discloses a system of range signal transmission, a base station and a terminal in the orthogonal frequency division multiplexing system. According to the invention, reverse access of the terminal in different area is flexibly supported.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a method, system and device for transmitting ranging signals in an orthogonal frequency division multiplexing system. Background technique [0002] Worldwide Interoperability for Microwave Access (WiMAX) technology is a new generation of broadband wireless metropolitan area network (WMAN) technology, specifically referring to broadband wireless access technology based on IEEE 802.16 series broadband wireless standards. Among them, 802.16d is a standard applicable to fixed broadband wireless access, and 802.16e is a broadband wireless access standard used to support mobile features. Its frame structure is as follows: figure 1 shown. The 802.16e physical layer adopts Orthogonal Frequency Division Multiplexing (OFDMA) technology, and can adopt MIMO, AAS and other advanced antenna technologies to obtain higher frequency utilization efficiency. [0003] The traditional multi-ca...

Claims

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Application Information

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IPC IPC(8): H04Q7/38H04B17/00H04L12/28H04L27/26
Inventor 刘珏君
Owner XFUSION DIGITAL TECH CO LTD
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