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Signal sending method and device

A signal transmission and signal technology, applied in wireless communication, digital transmission system, error prevention, etc., can solve the problems of reducing the spectrum utilization efficiency and performance of the LAA system, taking up a lot of time, etc., and achieve the effect of improving spectrum utilization efficiency and performance

Inactive Publication Date: 2016-10-05
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] After each LAA access point or base station seizes resources, it needs to perform a series of processes such as cell discovery, synchronization, uplink / downlink reception and measurement, CSI (Channel State Information, channel status information) feedback, and scheduling, which will take a lot of time (several ms, even several 10ms), that is to say, a considerable part of the time resources seized by the LAA access point or base station each time is used for processing operations other than data transmission, which will greatly reduce the spectrum usage of the LAA system efficiency and performance.

Method used

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  • Signal sending method and device
  • Signal sending method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0143] This embodiment describes a coordination mechanism before signal transmission, including:

[0144] Step 1. Before the LAA access point sends the DRS, it needs to implement the inter-cell sending coordination mechanism.

[0145]First, for the LAA access point that has sent the DRS, it is necessary to notify the adjacent LAA access point to start sending the DRS and the parameters of the sent DRS before sending the DRS or when starting to send the DRS. The DRS parameters may include one or more of the following: period, offset, duration, port, power, time-frequency resource, and the like. The notification method can be transmitted through wired connection or wireless air interface between LAA access points. Wireless means may transmit on licensed spectrum or over other unlicensed carriers that have acquired occupation rights.

[0146] Before the LAA access point sends DRS, it needs to decide whether it can send and send parameters according to the number of sent DRS LAA...

Embodiment 2

[0180] This embodiment relates to a signal listening mechanism before transmission, specifically including:

[0181] Step 1. Before the LAA access point sends the DRS, it needs to execute the interception mechanism.

[0182] Before the LAA access point prepares to send DRS, it listens and counts. It can start a timer to count the DRS that occurs within a certain period of time (for example, at least the maximum period of DRS, such as 200ms), and determine the number of LAA access points that are sending DRS. , DRS sending pattern and other information.

[0183] Before sending the DRS, the LAA access point needs to determine whether it can send the DRS and the sending parameters according to the detected number of DRS sending LAAs and the corresponding parameter configuration.

[0184] When the LAA access point prepares to initially send the DRS, or changes the DRS sending configuration, it needs to determine the new DRS sending configuration according to the interception and ...

Embodiment 3

[0204] This embodiment relates to a hybrid mechanism for sending DRS (combined mechanism of Short Control Signaling (SCS) and Clear Channel Assessment (CCA), specifically:

[0205] LAA can use a combination of Short Control Signaling (SCS) and Clear Channel Assessment (CCA) in an unlicensed carrier to send DRS or other necessary signals. LTE / LAA can formulate strict standards for sending signals using SCS before unlicensed carrier occupation, including limiting the period and duration of these symbols / channels, and at the same time need to meet the regulatory requirements of ETSI or other countries and regions. If the LAA access point is going to send reference signals on symbols other than these transmission patterns, it needs to perform the CCA function. The reference signal can only be sent when the channel is idle, and the CCA function needs to be performed once every time it is sent.

[0206] For example, the LTE standard may define that before the unlicensed carrier is o...

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Abstract

The present invention discloses a signal sending method and a device, wherein the method and the device are applied to an LAA access point or an LAA base station. The method comprises the steps of determining the configuration information of the short control signaling (SCS) for sending signals during the non-occupied period of an unlicensed carrier wave; and according to the determined configuration information, sending signals through the SCS. According to the embodiments of the invention, the signal sending before the occupation of the unlicensed carrier wave is realized. Therefore, the spectrum usage efficiency and the performance of an LAA system are improved.

Description

technical field [0001] The present invention relates to the field of wireless communication, and in particular, to a signal transmission method and device. Background technique [0002] LTE-U (Long Term Evolution-Unlicensed, LTE uses unlicensed carriers) refers to the deployment of LTE in unlicensed carriers to meet the increasing capacity requirements of the LTE system and improve the efficiency of unlicensed spectrum usage. A possible important evolution direction of wireless communication. When designing LTE-U, it is necessary to consider how to conduct data transmission with different systems such as WiFi (Wireless Fidelity, wireless fidelity), radar, as well as fair and friendly competition for unlicensed carriers between LTE-U and the same system. Does not affect and retain the technical characteristics of LTE. According to the statement of the 3GPP standard conference, the LTE-U system may also be called an LAA (LTE Licensed Assisted Access, LTE Licensed Assisted Ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/00H04L1/00
CPCH04W48/08
Inventor 徐汉青赵亚军莫林梅苟伟
Owner ZTE CORP
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