Uplink random access leading sequential selection method

A technology of random access preamble and sequence, applied in the field of mobile communication, can solve the problem of difficult implementation of a single-carrier time domain equalizer, and achieve the effects of ensuring geographic coverage, improving message detection rate, and avoiding waste.

Inactive Publication Date: 2007-12-19
GLOBAL INNOVATION AGGREGATORS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the complexity of the single-carrier time-domain equalizer is proportional to the cubic increase in the maximum delay of the channel, so the single-carrier time-domain equalizer is difficult to implement in some practical applications

Method used

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  • Uplink random access leading sequential selection method
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Embodiment Construction

[0037] First, the idea of ​​the present invention is explained: the single-carrier transmission and reception system is a promising communication system that achieves high spectral efficiency, high peak rate, and low peak-to-average ratio in a higher bandwidth. The random access based on single carrier should flexibly select the root sequence of the access preamble of its uplink random access signal to adapt to different working scenarios.

[0038] Secondly, the method of the present invention is described: a typical LTE mobile communication system includes a plurality of base stations and terminals; each base station needs one or more random access root sequences to form an uplink random access preamble, as shown in Figure 2, the base station or There are two methods for selecting the root sequence index for terminals within the coverage of the base station, specifically:

[0039] (1) When the base station only selects a random access preamble root sequence, select the approp...

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Abstract

This invention relates to a selecting method for up-line random access leading sequences, in which, the lead includes one or multiple ZC root sequences, if a base station needs a ZC root sequence, then the base station with wider covering sphere returns the sequence index with smaller CM value, if the station needs multiple ZC root sequences, then terminals far away from the base station selects the sequence index with smaller CM value or its corresponding expansion sequence.

Description

technical field [0001] The invention relates to mobile communication, in particular to a method for selecting an uplink random access preamble sequence. Background technique [0002] The data transmission rate required by the future mobile communication system will be as high as 100Mbit / s, and the supported services will also be extended from voice services to multimedia services, among which multimedia services include real-time streaming media services. Technologies that can achieve high speed and large capacity on limited spectrum resources have become a hot research topic at present. Broadband mobile communication systems usually suffer from frequency selectivity of the channel. The so-called frequency selectivity of the channel is that the attenuation of the channel is different at different frequencies. Frequency selective channels usually cause serious intersymbol interference ISI, intercarrier interference ICI and multiple access interference MAI. The most common ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/707H04L25/03H04W74/08
Inventor 张峻峰
Owner GLOBAL INNOVATION AGGREGATORS LLC
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