Method for sending uplink synchronizing channel and device

A transmission method and synchronization channel technology, applied in wireless communication, electrical components, etc., can solve problems that have not been raised, reduce overhead, etc., and achieve the effect of reducing waste and reducing overhead

Inactive Publication Date: 2012-10-24
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, no RACH structure suitable for the basic frame structure of LTE-LAN ​​has been proposed. Therefore, a RACH structure and transmission method suitable for LTE-LAN ​​is required to meet the coverage and timing accuracy requirements of LTE-LAN ​​and make full use of its system resources, reducing overhead

Method used

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  • Method for sending uplink synchronizing channel and device
  • Method for sending uplink synchronizing channel and device
  • Method for sending uplink synchronizing channel and device

Examples

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Embodiment 1

[0045] In this embodiment, according to Figure 4 The shown channel structure configures the RACH, so that the terminal can send uplink signals through the configured RACH.

[0046] Specifically, as Figure 4 As shown, in the frequency domain, the RACH bandwidth is 1.2MHz, the sequence length is 13, and the RACH frequency domain guard band bandwidth is 80KHz; in the time domain, the CP, Preamble and GT lengths of a RACH are 0.8us, 12.5us and 0.4us respectively.

Embodiment 2

[0048] In this embodiment, according to Figure 5 The shown channel structure configures the RACH, so that the terminal can send uplink signals through the configured RACH.

[0049] Such as Figure 5 As shown, in the frequency domain, the RACH bandwidth is 1.2MHz, the RACH sequence length is 13, and the RACH frequency domain guard band bandwidth is 80KHz; in the time domain, the CP, Preamble and GT lengths of a RACH are 5.6us, 2*12.5us and 4us.

Embodiment 3

[0051] In this embodiment, according to Figure 6 The shown channel structure configures the RACH, so that the terminal can send uplink signals through the configured RACH. Such as Figure 6 As shown, in the frequency domain, the RACH bandwidth is 1.2MHz, the RACH sequence length is 13, and the bandwidth of the RACH frequency domain guard band is 80KHz; in the time domain, the CP, Preamble and GT lengths of a RACH are 1.6us, 12.5us and 0.8 respectively us.

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PUM

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Abstract

The invention discloses a method for sending an uplink synchronizing channel (RACH) (Random Access Channel). The method comprises the steps of configuring RACH according to the following structure: in a time domain, the RACH comprises CP, Preamble, and GT, wherein the length of the CP is 0.8us, 1.6us or 5.6us, the length of the GT is 0.4us, 0.8us or 4us, and the length of the Preamble is 12.5us or N*12.5us, and N is an integer greater than 0; in a frequency domain, the bandwidth occupied by the RACH is 1.2MHz or 960KHz, and the width of a RACH sub carrier is 80KHz; and sending an uplink signal by the configured RACH. The invention further discloses a device for sending the RACH, which meets the requirements of coverage of LTE-LAN (Long Term Evolution-Local Area Network) and timing precision, as well as utilizes system resources adequately and reduces the expenses.

Description

technical field [0001] The present invention relates to Long-Term Evolution Local Area Network (LTE-LAN, Advanced Long-Term Evolution Local Area Network) technology, in particular to a method and device for sending an uplink synchronization channel (RACH, Random Access Channel). Background technique [0002] The wireless communication system completes uplink synchronization through RACH (also called random access channel). In practical applications, the uplink synchronization process is as follows: the terminal sends a preamble on the RACH, and the base station obtains the timing advance of the signal sent by the terminal through detection of the preamble, and feeds back the timing advance to the terminal. [0003] Such as figure 1 As shown, in the time domain, RACH is composed of three parts: cyclic prefix (CP, Cyclic Prefix), preamble (Preamble), and guard time (GT, Guard Time), wherein the length of each part is related to coverage and occupies more time domain The reso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04
Inventor 郝鹏郁光辉梁春丽鲁照华夏树强姜静
Owner ZTE CORP
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