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Synchronous signal transmission method and device

A technology of synchronous signal and transmission method, which is applied in the field of communication and can solve problems such as unreasonable design of synchronous signal

Active Publication Date: 2019-04-23
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a synchronization signal transmission method and device to at least solve the problem of unreasonable synchronization signal design in the LTE narrowband system in the related art

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  • Synchronous signal transmission method and device
  • Synchronous signal transmission method and device

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Embodiment 1

[0203] This preferred embodiment provides a method for transmitting a synchronization signal, where the synchronization signal is a primary synchronization signal PSS or a secondary synchronization signal SSS.

[0204] The synchronization signal is sent periodically, for example, the repetition period is 20ms or 40ms or 60ms or 80ms. The repetition period of PSS and SSS can be the same or different. For example, the sending period of the PSS is 80ms, and it is sent on one or more subframes; the sending period of the SSS is 20ms, and it is sent on one or more subframes. A timing of 80ms can be obtained by receiving the PSS.

[0205] The sending period may also be uneven. For example, the PSS is located in k1 consecutive radio frames, and is sent at a period of T1 radio frames, and T1≥k1, and the SSS is sent at a period of T2 radio frames. Here, when T1>k1, the PSS can be considered to be sent in an uneven period. Or, the PSS is sent at a period of T3 radio frames, the SSS is...

Embodiment 2

[0235] This embodiment provides a PSS transmission method.

[0236] In one repetition period, the PSS can occupy one subframe or multiple subframes. Preferably, the PSS can be located in subframes 4 and 5 of one radio frame, or in subframe 9 of one radio frame and subframe 9 of the next radio frame. frame 0.

[0237] In one repetition period, the PSS is located on multiple reference symbols, and the multiple reference symbols may be located on one subframe or multiple subframes. For example, the PSS occupies n (n>1) reference symbols on 1 subframe in a repetition period; or, the PSS occupies multiple subframes in a repetition period, each subframe occupies one or more reference symbols, and each subframe The number of reference symbols occupied above can be the same or different. For example, it is a reference symbol that does not contain CRS. For example, for a normal CP, in addition to the first three reference symbols that may be used for PDCCH, the reference symbol that ...

Embodiment 3

[0250] This embodiment provides an SSS transmission method.

[0251] SSS is sent repeatedly, and the repetition period of SSS is preset, such as 20ms or 40ms or 60ms. In practical applications, it is not limited to these types of period values.

[0252] In one repetition period, the SSS can be located on multiple reference symbols, such as reference symbols that do not contain CRS. For example, for a normal CP, except for the first three reference symbols that may be used for PDCCH, a subframe can be used for The reference symbols of the SSS are reference symbols 3, 5, and 6 on slots with even indices and reference symbols 2, 3, 5, and 6 on slots with odd indices. For the extended CP, in addition to the first three reference symbols that may be used for PDCCH, the reference symbols that can be used for SSS in a subframe are reference symbols 2, 4, 5 on the even-numbered slot and when the index is odd Reference symbols 2, 3, 5, 6 on the slot. Synchronization performance can b...

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Abstract

The present invention provides a synchronization signal transmission method and device, wherein the method includes: the base station periodically and repeatedly sends the synchronization signal to the terminal; within one repetition period, multiple orthogonal The frequency division multiplexing technology OFDM symbol is sent at the time corresponding to the synchronization signal. The synchronization signal is the primary synchronization signal PSS or the secondary synchronization signal SSS, or the terminal periodically receives the synchronization signal sent by the base station, which solves the problem of the narrowband system in LTE The problem of unreasonable design has realized the reasonable transmission of the synchronous signal of the narrowband system.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a synchronization signal transmission method and device. Background technique [0002] Machine Type Communication (MTC for short) User Equipment (User Equipment or Terminal for short), also known as Machine to Machine (M2M) user communication equipment, is currently the main application form of the Internet of Things. In the 3rd Generation Partnership Project (3rd Generation Partnership Project, referred to as 3GPP) technical report TR45.820V200, several technologies applicable to the cellular Internet of Things (Cellular Internet of Things, referred to as C-IOT) are disclosed, wherein the narrowband LTE (Narrowband LTE, NB-LTE for short) technology is the most eye-catching. The system bandwidth of the system is 200kHz, which is the same as the channel bandwidth of the Global system for Mobile Communication (GSM) system. Great convenience. The transmission bandwidth and down...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L5/00H04L27/26H04W72/04
CPCH04L5/0048H04L27/2655H04W4/70H04W72/20H04J11/0073H04J11/0076H04L5/005H04L27/261H04W56/0005H04L5/0007H04L7/08H04L27/2657
Inventor 张雯夏树强戴博刘锟石靖陈宪明
Owner ZTE CORP