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Method for obtaining bandwidth of base station as well as method, device and system for transmitting leader sequence

A preamble sequence and base station technology, applied in the transmission system, communication between multiple stations, electrical components, etc., can solve the problems of large amount of calculation, complicated synchronization process, and different buffer data volume, and achieve the effect of simple base station bandwidth

Inactive Publication Date: 2010-07-14
SHANGHAI HUAWEI TECH CO LTD
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Problems solved by technology

The general synchronization algorithm is implemented by time-domain correlation. It is necessary to perform FFT (Fast Fourier Transform, Fast Fourier Transform) operation on the received signal, and then do point multiplication with the frequency-domain data of each preamble sequence stored locally to obtain the correlation value. , and the number of FFT points corresponding to different bandwidths is different, so the amount of cached data is also different, resulting in a large amount of calculation
[0006] It can be seen that in the existing WIMAX protocol design scheme, when the terminal uses the preamble issued by the base station to realize the synchronization process, it is necessary to assume the bandwidth value of the base station, and the synchronization process based on the assumed bandwidth value of the base station is complicated.

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  • Method for obtaining bandwidth of base station as well as method, device and system for transmitting leader sequence
  • Method for obtaining bandwidth of base station as well as method, device and system for transmitting leader sequence
  • Method for obtaining bandwidth of base station as well as method, device and system for transmitting leader sequence

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Embodiment Construction

[0033] In order to facilitate a full understanding of the technical solutions of the embodiments of the present invention, the settings of the Preamble are described in detail first.

[0034] In the WiMAX technology, if the MS wants to access the cell of the base station, it first needs to know the bandwidth of the working frequency band of the base station. If the terminal has accessed the cell network of the base station last time, it will start searching from the last frequency point within a certain working frequency band bandwidth. First measure whether there is a signal at this frequency point, that is, RSSI (Received Signal Strength Indicator, received signal strength indicator) that meets the requirements. If there is RSSI and the RSSI exceeds a certain threshold value, it means that there may be a Wimax signal at this frequency point; if not, scan the next frequency point at a certain interval.

[0035] When detecting that there is a signal at a certain frequency poi...

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Abstract

The embodiment of the invention discloses a method for obtaining the bandwidth of a base station as well as a method, a device and a system for transmitting a leader sequence, wherein the method for obtaining the bandwidth of the base station comprises the steps of: receiving the leader sequence transmitted by the base station, wherein the leader sequence corresponds to the bandwidth of the base station; analyzing the leader sequence to obtain correspondence of the leader sequence and the bandwidth of the base station; and obtaining the bandwidth of the base station according to the correspondence of the leader sequence and the bandwidth of the base station. By the technical scheme of the embodiment of the invention, the bandwidth of the base station can be conveniently obtained by a terminal, thereby simplifying the process of establishing synchronization with the downlink of the base station by the terminal by using the preamble transmitted by the base station.

Description

technical field [0001] The present invention relates to the technical field of communication, and more specifically, relates to a method for acquiring base station bandwidth, a method, a device and a system for sending a preamble sequence. Background technique [0002] WiMAX (World Interoperability for Microwave Access) technology is a Broadband Wireless Access Metropolitan Area Network technology based on the IEEE 802.16 standard. [0003] In the existing WIMAX technology, if a terminal wants to access a cell of a base station, it first needs to establish downlink synchronization with the base station. At present, the establishment of downlink synchronization between the terminal and the base station is realized based on the preamble sent by the synchronization base station on the working frequency spectrum. [0004] In the WIMAX protocol, the preamble is located in the first symbol of the downlink subframe of the base station. Base stations with different bandwidths use ...

Claims

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Application Information

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IPC IPC(8): H04B7/26H04B1/707
CPCH04W48/08
Inventor 杨利英
Owner SHANGHAI HUAWEI TECH CO LTD
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