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Method and device for setting and using key parameters in communication system

A communication system and key parameter technology, applied in the field of communication, can solve the problems of poor reusability of wireless local area network standards and cellular mobile communication standards, and achieve the effect of saving resources and low cost

Active Publication Date: 2011-12-28
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, the main purpose of the present invention is to provide a key parameter setting and use method and device in a communication system, which can be compatible and shared with existing or to-be-used cellular network standards, and solve the problem of existing wireless local area network standards and cellular mobile networks. The problem of poor reusability of communication standards in software and hardware implementation

Method used

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  • Method and device for setting and using key parameters in communication system
  • Method and device for setting and using key parameters in communication system
  • Method and device for setting and using key parameters in communication system

Examples

Experimental program
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Embodiment 1

[0070] In this embodiment, in a communication system using OFDM and a sampling frequency of 30.72MHz, the subcarrier spacing is set to 120KHz, and the communication system uses an inverse Fourier transform operation of 30.72*1000 / 120=256 points to generate OFDM symbols and send .

[0071] Preferably, the CP of the OFDM symbol may include 24 sampling points, the length of which is about 0.781us, and the length of the entire OFDM symbol is about 9.115us, thus, the overhead of the CP is 8.57%.

[0072] Or, the CP of the OFDM symbol may include 12 sampling points, and the length is about 0.391us, and the length of the whole OFDM symbol is about 8.724us, so the overhead of the CP is 4.48%.

[0073] Alternatively, the CP of the OFDM symbol may include 25 sampling points, the length of which is about 0.814us, and the length of the entire OFDM symbol is about 9.147us. In this way, the overhead of the CP is 8.9%.

[0074] Alternatively, the CP of an OFDM symbol may include 13 sampling...

Embodiment 2

[0076] In this embodiment, in a communication system using OFDM and a sampling frequency of 30.72MHz, the subcarrier spacing is 60KHz, and the network side of the communication system uses an inverse Fourier transform operation of 30.72*1000 / 60=512 points to generate OFDM symbols and send.

[0077] Wherein, the CP of the OFDM symbol may include 24 sampling points, the length is about 0.781us, and the length of the whole OFDM symbol is about 17.448us, so the overhead of the CP is 4.48%.

[0078] Alternatively, the CP of the OFDM symbol may include 12 sampling points, the length of which is about 0.391us, and the length of the entire OFDM symbol is about 17.057us, so the overhead of the CP is 2.29%.

[0079] Alternatively, the CP of the OFDM symbol includes 25 sampling points, the length is about 0.814us, and the length of the whole OFDM symbol is about 17.48us, so the overhead of the CP is 4.66%.

[0080] Alternatively, the CP of the OFDM symbol includes 13 sampling points wit...

Embodiment 3

[0082] In this embodiment, in a communication system using OFDM technology and a sampling frequency of 30.72MHz, the subcarrier spacing is set to 120KHz, and the communication system uses an inverse Fourier transform operation of 30.72*1000 / 120=256 points to generate OFDM symbols and transmit them.

[0083] Wherein, the number of available subcarriers of the OFDM symbol may be 256*(75 / 128)=150, and the available subcarriers include pilot subcarriers and data subcarriers.

[0084] Alternatively, the number of guard subcarriers of the OFDM symbol may be 256*(53 / 128)=106, where the guard subcarriers include DC subcarriers.

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Abstract

Disclosed is a data sending method in a wireless communication system. The method includes: setting the sub-carrier interval of a communication system as (60*M) KHz, with M being an integer greater than 0 (101); and the communication system generating an OFDM symbol by way of inverse fast Fourier transform and sending the same, wherein the points of the inverse fast Fourier transform operation are determined according to the sub-carrier interval and the current sampling frequency (102). Also disclosed is a data sending device in a wireless communication system, which can be compatible and shared with the existing cellular network standards or standards to be used, thereby providing a solution suitable for the cellular mobile field and nomadic / local wireless data access with low costs, greatly reducing the development or usage costs of the manufacturers and operators of the cellular device, which not only saves resources but also can meet the data user demand developing with high speed and the future development demand of the wireless communication industry.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a method and device for setting and using key parameters in a communication system. Background technique [0002] With the development of the mobile Internet and the popularization of smart phones, the demand for mobile data traffic is increasing rapidly, and the rapid growth of data services poses a severe challenge to the transmission capacity of mobile communication networks. According to the prediction of authoritative organizations, in the next ten years, the mobile data business volume will double every year, and will increase by a thousand times in ten years. [0003] Most mobile data services mainly occur indoors and hotspot environments, which are reflected in nomadic / local wireless access scenarios. According to statistics, nearly 70% of the current mobile data traffic takes place indoors, and this proportion will continue to grow, and it is expected that by 2012...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26
CPCH04W72/1205H04L27/2628H04L27/2607H04L27/26
Inventor 鲁照华刘锟宁迪浩郁光辉胡留军
Owner ZTE CORP
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