WO2018149051A1

WO2018149051A1 - Synchronization signal monitoring method and device

Info

Publication number: WO2018149051A1
Application number: PCT/CN2017/086630
Authority: WO
Inventors: 庄宏成
Original assignee: 华为技术有限公司
Priority date: 2017-02-20
Filing date: 2017-05-31
Publication date: 2018-08-23
Also published as: CN110050490B; CN110050490A

Abstract

A synchronization signal monitoring method and device for resolving the problem of low monitoring efficiency when monitoring a synchronization signal by a terminal device in an LAA-NR system. The method comprises: upon detecting that a channel on an unlicensed carrier used by a unlicensed cell is idle, a base station occupying the channel to send a synchronization signal, and sending the channel detection result to a controller; after receiving the channel detection result, the controller carrying an identifier of the unlicensed carrier used by the unlicensed cell and synchronization signal configuration information in monitoring instruction information and sending the monitoring instruction information to a terminal device; after receiving the monitoring instruction information, the terminal device can monitor the synchronization signal over the channel on the unlicensed carrier according to the synchronization signal configuration information. In this way, the controller can notify the terminal device of when and how to monitor the synchronization signal by sending the monitoring instruction information to the terminal device, so that the monitoring efficiency of the terminal device in monitoring the synchronization signal can be improved, and the access performance and service performance of the terminal device can be further improved.

Description

Method and device for monitoring synchronous signal

This application claims the priority of the Chinese Patent Application filed on Dec. 20, 2017, the Chinese Patent Office, Application No. 201710091251.9, entitled "A Method and Apparatus for Detecting Synchronization Signals of LAA-NR", the entire contents of which are hereby incorporated by reference. The citations are incorporated herein by reference.

Technical field

The present application relates to the field of wireless communication technologies, and in particular, to a method and a device for monitoring a synchronization signal.

Background technique

With the rapid development of mobile communication technologies, the contradiction between the public's demand for high-bandwidth communication services and the scarcity of licensed spectrum resources has become increasingly acute. In order to solve the current crisis of licensing scarce spectrum, the 3rd Generation Partnership Project (3GPP) proposed the concept of Licensed-Assisted Access (LAA). LAA technology is a technology that can extend the Long Term Evolution (LTE) working spectrum from licensed spectrum to unlicensed spectrum and communicate with licensed spectrum to control unlicensed spectrum.

In the LTE system (also known as the LAA-LTE system) using the LAA technology, the carrier aggregation (CA) of the licensed band and the unlicensed band is adopted, that is, the licensed carrier in the licensed band is configured as the primary carrier, and configured. The unlicensed carrier in the unlicensed band acts as a secondary carrier, which can expand the capacity of the Mobile Broadband network and improve the spectrum utilization of the system.

In the LAA-LTE system, a base station using a secondary carrier (or an unlicensed carrier) can follow a Load-Based Equipment (LBE) Listening Before Talk (LBT) mechanism. The LBE mechanism is: when a base station using a secondary carrier needs to communicate with a terminal device, including transmitting data or a Synchronization Signal (SS), etc., before accessing a channel on the secondary carrier resource, Performing Clear Channel Assessment (CCA) detection on the channel, if the detection result is that the channel is idle, the base station can perform communication on the channel; if the detection result is that the channel is busy, the base station continues to perform the extended idle channel. Evaluation (Extended CCA, ECCA) test. The ECCA detects that the base station generates one CCA detection backoff number N, and the base station needs to perform communication on the channel when the detection result of the subsequent N times of CCA detection is that the channel is idle.

Since the new radio (NR) technology supports the advantages of flexible air interface, the adoption of NR technology is also a trend of mobile communication systems. The mobile communication system adopting the NR technology supports flexible synchronization signal transmission, that is, the synchronization signal can be in the form of a SS block, a SS burst, and a SS burst set, and can be The SS burst set includes multiple SS bursts, one SS burst contains multiple SS blocks, and one SS block contains multiple synchronization signals.

For example, when the carrier used by the base station is in a low frequency band (less than 6 gigahertz (GHz)), the base station can transmit the synchronization signal in an omnidirectional transmission mode. When the carrier used by the base station is in a high frequency band (greater than 6 GHz), the base station may transmit the synchronization signal by using a semi-omnidirectional transmission mode or a directional transmission mode.

According to the above discussion, a mobile communication system using both LAA technology and NR technology (which may be called LAA-NR) System), before transmitting the synchronization signal, the base station using the secondary carrier needs to use the LBT mechanism of the LBE for channel detection on the channel on the secondary carrier resource, and after determining that the channel access condition is met, a certain transmission mode can be adopted on the channel. Send a sync signal. Since there are multiple base stations using different secondary carriers in the LAA-NR system, the secondary carriers used by each base station are not fixed. Therefore, the terminal devices cannot determine the secondary carriers used by each base station, and the system supports flexible support. Synchronous signal transmission, therefore, it is impossible to determine which transmission mode terminal device is used by each base station using the secondary carrier.

In summary, the terminal device in the LAA-NR system cannot determine the channel occupied by the base station using the secondary carrier to transmit the synchronization signal, and cannot determine the transmission mode of the transmission synchronization signal used by the base station, that is, the terminal device cannot determine which channel is on which channel. When the synchronization signal is received, the monitoring efficiency of the terminal device to monitor the synchronization signal is low, which further affects the access performance and service performance of the terminal device.

Summary of the invention

The embodiment of the present invention provides a method and a device for monitoring a synchronization signal, which are used to solve the problem that the monitoring efficiency of the monitoring signal of the terminal device in the LAA-NR system is low.

In a first aspect, the embodiment of the present application provides a method for monitoring a synchronization signal, which is applicable to the mobile communication system shown in FIG. 4, and the method includes:

After the controller receives the channel detection result of the license-free cell from the base station, determining synchronization signal configuration information of the license-free cell, where the channel detection result is used to notify the controller of the unlicensed carrier used by the license-free cell The upper channel is idle, the unlicensed cell is a cell that is used by the base station to use an unlicensed carrier; the synchronization signal configuration information is used to indicate a manner in which the synchronization signal of the unlicensed cell is sent; and then, the controller And generating interception indication information including the identifier of the unlicensed carrier used by the license-free cell and the synchronization signal configuration information, and sending the interception indication information to the terminal device.

In the above method, after the controller receives the channel detection result, the interception indication information is sent to the terminal device, that is, the controller sends after determining that the base station detects that the channel is idle. The monitoring indication information indicates that the terminal device monitors the synchronization signal. Therefore, by using the method, the controller can accurately notify the terminal device in the system when to listen to the synchronization signal, and can prevent the terminal device from being unable to determine when The phenomenon of monitoring the synchronization signal may also reduce the power consumption caused by the terminal device listening for the synchronization signal for a long time; and further, the identifier of the unlicensed carrier and the synchronization signal configuration information are included in the monitoring indication information, The terminal device may monitor the synchronization signal in the channel on the unlicensed carrier according to the sending manner of the synchronization signal of the license-free cell indicated by the synchronization signal configuration information, and therefore, by using the method, the controller may further Notifying the terminal device how to monitor the synchronization signal by using the monitoring indication information, thereby ensuring The terminal apparatus can accurately monitor the synchronization signal. In summary, the controller may send the monitoring indication information to the terminal device to notify the terminal device when and how to monitor the synchronization signal, thereby improving the monitoring efficiency of the terminal device to monitor the synchronization signal, thereby further The access performance and service performance of the terminal device are improved.

In a possible design, before the controller receives the channel detection result, the controller allocates the unlicensed carrier to the unlicensed cell maintained by the base station, and sends the unlicensed carrier to the base station. The identity of the license-free carrier.

Through the above design, the controller can control and manage the unlicensed carrier used by the license-free cell.

In one possible design, the controller may allocate the unlicensed carrier for the unlicensed cell in the following manner:

The controller allocates the unlicensed carrier to the unlicensed cell according to at least one of the following: a traffic volume in the unlicensed cell, a history of the license-free cell using the unlicensed carrier, and a received location A history of channel detection results of the license-exempt cell and remaining capacity of the license-exempt cell.

Through the above design, the controller allocates the unlicensed carrier to the base station, which can improve the utilization of the unlicensed carrier and improve the probability that the base station accesses the channel on the unlicensed carrier.

In one possible design, the controller may assign an unlicensed carrier to all of the unlicensed cells in the mobile communication system by way of the above design.

Through the above design, the controller can globally arrange the unlicensed carrier competition from the entire mobile communication system, reduce the probability that different license-free cells compete for the same unlicensed carrier (competition conflict), thereby improving the utilization of the unlicensed carrier, and the base station. The probability of accessing a channel on an unlicensed carrier.

In one possible design, the controller may determine the synchronization signal configuration information by:

The first mode: the controller determines, according to the correspondence between the identifier of the stored cell and the synchronization signal configuration information, the synchronization signal configuration information corresponding to the identifier of the license-free cell;

The second mode: the controller determines the synchronization signal configuration information corresponding to the identifier of the license-free carrier according to the correspondence between the identifier of the stored license-free carrier and the synchronization signal configuration information;

In a third mode, the controller acquires the synchronization signal configuration information included in the channel detection result.

Through the above design, the controller can quickly and accurately determine the synchronization signal configuration information of the license-free cell.

In a possible design, the synchronization signal configuration information includes: a size and a beam direction of the synchronization signal block SS block, a size and a period of the synchronization signal batch SS burst, and a size and a period of the synchronization signal batch collection SS burst set.

Through the above design, the synchronization signal configuration information may indicate a transmission manner of the synchronization signal of the unlicensed cell by using the foregoing various pieces of information.

In a possible design, the synchronization signal configuration information is a synchronization signal configuration template identifier, wherein the synchronization signal configuration template identifier is used to determine a synchronization signal configuration template, and the synchronization signal configuration template includes: an SS block size and Beam direction, SS burst size and period, SS burst set size and period.

Through the above design, by using the synchronization signal configuration information, the synchronization signal configuration template can be determined, and then the foregoing information is determined, and the synchronization signal configuration information is used to indicate the manner in which the synchronization signal of the unlicensed cell is transmitted.

In a possible design, the controller sends the interception indication information to the terminal device, including:

The controller sends, to the terminal device, broadcast signaling, radio resource control RRC signaling, media access control MAC layer signaling, or physical layer control signaling that carries the interception indication information.

Through the foregoing design, the controller may send the interception indication information to the terminal device by using broadcast signaling, RRC signaling, MAC layer signaling, or physical layer control signaling, and ensure that the mobile communication system is in the mobile communication system. The terminal device may receive the interception indication information.

In a second aspect, the embodiment of the present application further provides a method for monitoring a synchronization signal, where the method is applied to the mobile communication system shown in FIG. 4, the method includes:

The base station detects a channel on the unlicensed carrier used by the unlicensed cell, for example, the channel CCA detection or ECCA detection, the unlicensed cell is a cell maintained by the base station using an unlicensed carrier; the base station determines Decoding the configuration information of the unlicensed cell, the synchronization signal configuration information is used to indicate a transmission mode of the synchronization signal of the unlicensed cell; when the base station determines that the channel is idle, according to the synchronization signal configuration Information The manner of transmitting the synchronization signal is shown, occupying the channel to transmit a synchronization signal, and transmitting a channel detection result to the controller.

After the method detects that the channel is idle, the base station sends a channel detection result to the controller to notify the controller that the channel on the unlicensed carrier used by the license-free cell is idle. In this way, the controller may instruct the terminal device to start monitoring the synchronization signal of the license-free cell by sending the interception indication information to the terminal device. Therefore, by the above solution, the controller can accurately notify the terminal device in the mobile communication system when to listen to the synchronization signal, and can avoid the phenomenon that the terminal device cannot determine when to monitor the synchronization signal, and can also reduce the The power consumption caused by the terminal device listening to the synchronization signal for a long time.

In a possible design, before the base station detects the channel on the unlicensed carrier, the base station may determine the unlicensed carrier by:

The first mode: the base station receives the identifier of the unlicensed carrier from the controller, and determines the unlicensed carrier according to the identifier of the unlicensed carrier;

The second mode: the base station allocates the unlicensed carrier to the unlicensed cell.

Through the above design, the base station may determine the unlicensed carrier of the unlicensed cell, so that the channel on the unlicensed carrier may be detected.

In a possible design, the base station may determine the synchronization signal configuration information by:

The first mode: the base station determines, according to the correspondence between the identifier of the stored cell and the synchronization signal configuration information, the synchronization signal configuration information corresponding to the identifier of the license-free cell;

a second mode: the base station determines, according to the correspondence between the identifier of the stored unlicensed carrier and the synchronization signal configuration information, the synchronization signal configuration information corresponding to the identifier of the license-free carrier;

In a third mode, the base station acquires the preset synchronization signal configuration information in a scenario in which the controller or the configuration personnel presets the synchronization signal configuration information in the base station.

With the above design, the base station can quickly and accurately determine the synchronization signal configuration information.

In a possible design, the synchronization signal configuration information is further included in the channel detection result.

With the above design, after the controller receives the channel detection result of the unlicensed cell from the base station, the synchronization signal configuration information included in the channel detection result may be acquired.

Through the foregoing design, the base station may obtain the foregoing information included in the synchronization signal configuration information, so that the base station may subsequently send a synchronization signal according to each information in the synchronization signal configuration information. .

Through the foregoing design, the base station may determine the synchronization signal configuration template by determining the synchronization signal configuration information, and further obtain the foregoing information included therein, so that the base station may subsequently configure information according to the synchronization signal. In the various information, send a synchronization signal.

In a third aspect, the embodiment of the present application provides a method for monitoring a synchronization signal, which is applied to a mobile communication system as shown in FIG. 4, where the method includes:

First, the terminal device receives, from the controller, an identifier and a synchronization signal of the unlicensed carrier including the use of the license-free cell. The monitoring indication information of the information, the unlicensed cell is a cell using the unlicensed carrier, the synchronization signal configuration information is used to indicate a transmission mode of the synchronization signal of the unlicensed cell; and then, the terminal device is configured according to the monitoring indication The synchronization signal configuration information in the information monitors a synchronization signal in a channel on the unlicensed carrier corresponding to the identifier of the unlicensed carrier.

After receiving the interception indication information sent by the controller, the terminal device starts to monitor the synchronization signal, and, because the monitoring indication information is determined by the controller, after the base station detects that the channel is idle, Therefore, the terminal device can determine when to listen to the synchronization signal by using the interception indication information, and can prevent the terminal device from determining whether to monitor the synchronization signal, and can also reduce the terminal device to listen for a long time. The power consumption caused by the synchronization signal; in addition, since the identifier of the license-free carrier and the synchronization signal configuration information are included in the interception indication information, the terminal device may perform the license-free indication according to the synchronization signal configuration information. The manner of transmitting the synchronization signal of the cell, the synchronization signal is monitored in the channel on the unlicensed carrier. Therefore, the controller may further notify the terminal device how to monitor the synchronization signal by using the monitoring indication information. Ensure that the terminal device can accurately monitor the synchronization signal . In summary, the controller may send the monitoring indication information to the terminal device to notify the terminal device when and how to monitor the synchronization signal, thereby improving the monitoring efficiency of the terminal device to monitor the synchronization signal, thereby further The access performance and service performance of the terminal device are improved.

In the above design, the terminal device may determine, by using the foregoing information included in the synchronization signal configuration information, a manner of transmitting the synchronization signal of the license-free cell.

In a possible design, based on the above design, the terminal device may monitor the synchronization signal in the channel according to the synchronization signal configuration information by using the following steps:

The terminal device monitors an SS burst Set in the channel according to the size and period of the SS burst set in the synchronization signal configuration information, and according to the size and the SS burst in the synchronization signal configuration information. Periodically listening to the SS burst in the SS burst set; and listening to the SS block in the SS burst according to the size and beam direction of the SS block in the synchronization signal configuration information, to obtain the SS block Synchronization signal.

With the above design, the terminal device can monitor the synchronization signal according to the manner in which the synchronization signal of the license-free cell indicated by the synchronization signal configuration information is transmitted.

In a possible design, the synchronization signal configuration information is a synchronization signal configuration template identifier, wherein the synchronization signal configuration template identifier is in one-to-one correspondence with a synchronization signal configuration template, and the synchronization signal configuration template includes: a size of an SS block. And beam direction, SS burst size and period, SS burst set size and period;

Through the foregoing design, the terminal device may determine the synchronization signal configuration template by using the synchronization signal configuration information, and further determine, according to the synchronization signal configuration information in the template, a manner of transmitting the synchronization signal of the license-free cell.

Determining, by the terminal device, the template identifier according to the synchronization signal, the synchronization signal configuration template corresponding to the synchronization signal configuration template identifier; and the terminal device configuring the SS burst in the template according to the synchronization signal The size and period of the set, listening to the SS burst Set in the channel; and configuring the size and period of the SS burst in the template according to the synchronization signal, listening to the SS burst in the SS burst Set; and according to the SS block The size and beam direction, listening to the SS block in the SS burst, to obtain the synchronization signal in the SS block.

In a possible design, the terminal device may receive the interception indication information from the controller in the following manner:

The terminal device receives broadcast signaling, radio resource control RRC signaling, media access control MAC layer signaling, or physical layer control signaling that carries the interception indication information from the controller.

Through the above design, the terminal device can receive the monitoring indication information sent by the controller.

In a fourth aspect, the embodiment of the present application further provides a controller, which has a function of implementing controller behavior in the foregoing method instance. The functions may be implemented by hardware or by corresponding software implemented by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In a possible design, the structure of the controller includes a receiving unit, a processing unit, and a sending unit, and the units may perform corresponding functions in the foregoing method examples. For details, refer to the detailed description in the method example. Narration.

In a possible design, the controller includes a transceiver, a processor, and a memory, the transceiver is configured to receive and transmit data, and the processor is configured to support the controller to perform the foregoing method. The corresponding function. The memory is coupled to the processor, which stores program instructions (or applications) and data necessary for the controller.

In a fifth aspect, the embodiment of the present application further provides a base station, where the base station has a function of implementing a behavior of a base station in the foregoing method instance. The functions may be implemented by hardware or by corresponding software implemented by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In a possible design, the structure of the base station includes a receiving unit, a processing unit, and a sending unit, and the units may perform corresponding functions in the foregoing method examples. For details, refer to the detailed description in the method example, which is not described herein. .

In a possible design, the base station includes a transceiver, a processor, and a memory, the transceiver is configured to receive and transmit data, and the processor is configured to support the base station to perform a corresponding one of the foregoing methods. Features. The memory is coupled to the processor, which stores program instructions (or applications) and data necessary for the base station.

In a sixth aspect, the embodiment of the present application further provides a terminal device, where the terminal device has a function of implementing behavior of the terminal device in the foregoing method instance. The functions may be implemented by hardware or by corresponding software implemented by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In a possible design, the structure of the terminal device includes a receiving unit and a processing unit, and the units can perform corresponding functions in the foregoing method examples. For details, refer to the detailed description in the method example, which is not described herein.

In a possible design, the structure of the terminal device includes a transceiver, a processor, and a memory, the transceiver is configured to receive and transmit data, and the processor is configured to support the terminal device to perform the foregoing method. The corresponding function. The memory is coupled to the processor, which stores program instructions (or applications) and data necessary for the terminal device.

In a seventh aspect, the embodiment of the present application further provides a computer storage medium, where the software program is stored in the storage medium, The software program, when read and executed by one or more processors, can implement the methods provided by any one of the first to sixth aspects and any of the above aspects.

In an eighth aspect, the embodiment of the present application further provides a computer program product comprising instructions, when executed on a computer, causing the computer to perform the method described in the above aspects.

In the embodiment of the present application, after receiving the channel detection result, the controller sends the interception indication information to the terminal device, that is, after the controller determines that the channel detects that the channel is idle. Sending the interception indication information, instructing the terminal device to monitor the synchronization signal. Therefore, the controller can accurately notify the terminal device in the system when the synchronization signal is monitored, and the terminal device can be prevented from determining the The phenomenon of monitoring the synchronization signal may also reduce the power consumption caused by the terminal device listening for the synchronization signal for a long time; and further, the identifier of the unlicensed carrier and the synchronization signal configuration information are included in the monitoring indication information, The terminal device may monitor the synchronization signal in the channel on the unlicensed carrier according to the transmission manner of the synchronization signal of the license-free cell indicated by the synchronization signal configuration information, and therefore, by using the scheme, the controller further The monitoring indication information can be used to notify the terminal device how to monitor the synchronization signal, thereby ensuring Said terminal apparatus can accurately monitor the synchronization signal. In summary, the controller may send the monitoring indication information to the terminal device to notify the terminal device when and how to monitor the synchronization signal, thereby improving the monitoring efficiency of the terminal device to monitor the synchronization signal, and further The access performance and service performance of the terminal device are improved.

DRAWINGS

FIG. 1 is a schematic diagram of an example of sending a first synchronization signal according to an embodiment of the present application;

2 is a schematic diagram of an example of sending a second synchronization signal according to an embodiment of the present application;

FIG. 3 is a schematic diagram of an example of sending a third synchronization signal according to an embodiment of the present disclosure;

FIG. 4 is a structural diagram of a mobile communication system according to an embodiment of the present application;

FIG. 5 is a flowchart of a method for monitoring a synchronization signal according to an embodiment of the present application;

FIG. 6 is a flowchart of an example of a method for monitoring a synchronization signal according to an embodiment of the present application;

FIG. 7 is a structural diagram of a first controller according to an embodiment of the present application;

FIG. 8 is a structural diagram of a first base station according to an embodiment of the present application;

FIG. 9 is a structural diagram of a first terminal device according to an embodiment of the present application;

FIG. 10 is a structural diagram of a second controller according to an embodiment of the present application;

FIG. 11 is a structural diagram of a second base station according to an embodiment of the present application;

FIG. 12 is a structural diagram of a second terminal device according to an embodiment of the present application.

detailed description

The embodiment of the present invention provides a method and a device for monitoring a synchronization signal, which are used to solve the problem that the monitoring efficiency of the monitoring signal of the terminal device in the LAA-NR system is low. The method and the device are based on the same inventive concept. Since the method and the device solve the problem are similar, the implementation of the device and the method can be referred to each other, and the repeated description is not repeated. .

In the embodiment of the present application, the base station in the LAA-NR system detects the channel on the unlicensed carrier used by the license-free cell, and detects that the channel is idle, according to the synchronization signal configuration information indication of the unlicensed cell. The manner of transmitting the synchronization signal, occupying the channel to send a synchronization signal, and transmitting a channel detection result to the controller; After receiving the channel detection result, the identifier of the unlicensed carrier used by the license-free cell and the synchronization signal configuration information are carried in the interception indication information and sent to the terminal device; the terminal device is receiving After the monitoring indication information is sent, the synchronization signal may be monitored on the channel on the unlicensed carrier according to the transmission manner of the synchronization signal of the license-free cell indicated by the synchronization signal configuration information.

In the above solution, after the controller receives the channel detection result, the interception indication information is sent to the terminal device, that is, the controller sends after determining that the base station detects that the channel is idle. The monitoring indication information instructs the terminal device to monitor the synchronization signal. Therefore, the controller can accurately notify the terminal device in the LAA-NR system when the synchronization signal is monitored, and the terminal device can be prevented from being unable to Determining when to listen to the synchronization signal, the power consumption caused by the terminal device listening for the synchronization signal for a long time may also be reduced; and the identifier of the unlicensed carrier and the synchronization signal configuration information are included in the monitoring indication information, Therefore, the terminal device can monitor the synchronization signal in the channel on the unlicensed carrier according to the transmission manner of the synchronization signal of the license-free cell indicated by the synchronization signal configuration information, and therefore, by using the scheme, the control The device may further notify the terminal device how to monitor the synchronization signal by using the monitoring indication information, and ensure The terminal apparatus can accurately monitor the synchronization signal. In summary, the controller may send the monitoring indication information to the terminal device to notify the terminal device when and how to monitor the synchronization signal, thereby improving the monitoring efficiency of the terminal device to monitor the synchronization signal, and further The access performance and service performance of the terminal device are improved.

Hereinafter, some of the terms in the present application will be explained to be understood by those skilled in the art.

1) The LAA-NR system according to the embodiment of the present application, and a mobile communication system using both LAA technology and NR technology.

2) The base station involved in the embodiment of the present application is a device that accesses the terminal device to the wireless network, including but not limited to: an evolved Node B (eNB), a radio network controller (radio network controller, RNC). ), Node B (NB), Base Station Controller (BSC), Base Transceiver Station (BTS), Home Base Station (for example, Home evolved NodeB, or Home Node B, HNB), Baseband Unit (BBU), Access Point (AP), etc. A base station can maintain at least one cell.

3) The terminal device, which is also referred to as a User Equipment (UE), is a device that provides voice and/or data connectivity to a user, for example, a handheld device with wireless connection function. Equipment, in-vehicle equipment, wearables, computing equipment, mobile stations (MS) or other processing equipment connected to a wireless modem.

4) The controller involved in the embodiment of the present application is a functional entity responsible for controlling and managing the terminal device in the LAA-NR system to monitor the synchronization signal. Optionally, the controller may also be responsible for the use and allocation of the unlicensed carrier in the LAA-NR system. Optionally, the controller may be a separate physical device with wireless communication function, capable of communicating with the base station and the terminal device in the LAA-NR system. Optionally, the controller may be integrated in a base station of the LAA-NR system, and implement the function of the controller by using a wireless communication function of the base station.

5) The unlicensed carrier involved in the embodiment of the present application is a carrier whose frequency is in an unlicensed frequency band.

Correspondingly, the licensed carrier involved in this application is a carrier whose frequency is in the licensed frequency band.

6) The license-free cell involved in the embodiment of the present application is a cell using an unlicensed carrier. In other words, the cell whose working channel is the channel on the unlicensed carrier is an unlicensed cell. It should be noted that, in the LAA-NR system, the base station to which the license-free cell belongs, before transmitting the synchronization signal of the license-free cell, follows the LBE mechanism, and performs CCA on the channel on the unlicensed carrier used by the license-free cell. Detection or ECCA testing.

Correspondingly, the licensed cell involved in the embodiment of the present application is a cell that uses a licensed carrier.

7) The method for transmitting the synchronization signal of the license-free cell according to the embodiment of the present application defines a transmission rule that the base station follows when transmitting the synchronization signal of the license-free cell. For example, the beam direction when the base station transmits each synchronization signal, the timing of transmitting the synchronization signal, and the transmission form of the synchronization signal (such as SS block, SS burst, SS burst set, etc.).

The following describes the transmission mode of the synchronization signal in the mobile communication system using the NR technology as an example:

Transmission mode 1: As shown in FIG. 1 , when the unlicensed carrier used by the license-free cell is less than 6 GHz, the base station of the license-free cell may use the omnidirectional transmission of the synchronization signal of the license-free cell, that is, the base station uses all The direction beam transmits the minimum granularity (SS block) of the synchronization signal. As shown in FIG. 1, the circle of the solid line below each SS block represents the beam of all directions used by the base station.

Transmission mode 2: As shown in FIG. 2, when the unlicensed carrier used by the unlicensed cell is greater than 6 GHz, the base station of the license-free cell may transmit the synchronization signal of the unlicensed cell in a semi-omnidirectional manner, that is, the base station uses Beams in the same direction transmit SS blocks in the same SS burst, while beams in different directions are used to transmit different SS bursts. As shown in FIG. 2, a dotted circle below each SS block represents a beam in all directions, and a circle formed by a solid line below each SS block represents a beam in a certain direction used by the base station. Wherein, the direction of the beam can be represented by the position of the solid circle relative to the dotted circle.

Transmission mode 3: As shown in FIG. 3, when the unlicensed carrier used by the unlicensed cell is greater than 6 GHz, the base station of the license-free cell may adopt a directional transmission of the synchronization signal of the license-free cell, that is, the base station uses different directions. The beams transmit SS blocks within the same SS burst and use different directions of beams to transmit different SS bursts. As shown in FIG. 3, a dotted circle below each SS block represents a beam in all directions, and an ellipse formed by a solid line below each SS block represents a beam in a certain direction used by the base station. Wherein, the direction of the beam can be represented by the position of the ellipse relative to the dotted circle.

It should be noted that the present embodiment does not limit the transmission manner of the synchronization signal according to the embodiment of the present application. The transmission method of the synchronization signal in the embodiment of the present application may further include multiple transmission methods other than the present example.

Through the above-mentioned example of the transmission mode of the synchronization signal, when the synchronization signal is transmitted in the transmission form (such as SS block, SS burst, SS burst set), the base station needs to determine at least the size and beam direction of the SS block, SS. The size and period of the burst, the size and period of the SS burst set, etc., so that the synchronization signal can be sent based on the above information.

The SS burst set includes multiple SS bursts, and one SS burst includes multiple SS blocks, and one SS block includes multiple synchronization signals.

8) The synchronization signal configuration information of the license-free cell according to the embodiment of the present application is used to indicate a transmission mode of the synchronization signal of the license-free cell. Therefore, in the LAA-NR system, both the base station and the terminal device can determine the transmission mode of the synchronization signal of the unlicensed cell according to the synchronization signal configuration information. According to the above discussion of the transmission mode of the synchronization signal, both the base station and the terminal device can determine the size and beam direction of the SS block, the size and period of the SS burst, the size and period of the SS burst set, etc. according to the synchronization signal configuration information. information.

Optionally, the synchronization signal configuration information may include the foregoing information, so that the base station and the terminal device may obtain the foregoing information directly after determining the synchronization signal configuration information.

Due to the size and beam direction of the SS block, the size and period of the SS burst, and the size and period of the SS burst set are more, if the information is carried in the synchronization signal configuration information, the information of the synchronization signal configuration information is caused. The overhead is large, and the transmission efficiency when transmitting the synchronization signal configuration information is also reduced. Therefore, optionally, the base station and the terminal device may maintain at least one synchronization signal configuration template, where each synchronization signal configuration template includes the foregoing information, and of course, the foregoing items included in different synchronization signal configuration templates The value of the information is different. This For example, the synchronization signal configuration information may be configured with a template identifier for the synchronization signal, thereby reducing the information overhead of the synchronization signal configuration information and improving the transmission efficiency when transmitting the synchronization signal configuration information.

9) The remaining capacity of the license-exempt cell according to the embodiment of the present application is a capacity other than the occupied capacity of the total capacity of the license-free cell.

Multiple means two or more.

In addition, it should be understood that in the description of the present application, the terms "first", "second" and the like are used only to distinguish the purpose of description, and are not to be understood as indicating or implying relative importance, nor as an indication. Or suggest the order.

The embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

FIG. 4 shows an architecture of a possible mobile communication system to which the method for monitoring a synchronization signal provided by the embodiment of the present application is applicable, and the mobile communication system is a LAA-NR system. Referring to FIG. 4, the LAA-NR system includes: a controller 401, at least one base station 402 (base station 402a, base station 402b and base station 402c as shown in the figure), and a terminal device 403.

Since the LAA-NR system implements carrier aggregation through a licensed carrier and an unlicensed carrier, communication transmission is realized. Therefore, in the LAA-NR system, the licensed carrier is the primary carrier and the unlicensed carrier is the secondary carrier.

A plurality of cells exist in the LAA-NR system employing carrier aggregation, and each component carrier corresponds to one cell. Among them, the cell using the licensed carrier (primary carrier) is the licensed cell (primary cell), and the cell using the unlicensed carrier (secondary carrier) is the unlicensed cell (secondary primary cell). As shown, the cell maintained by base station 402a is a licensed cell, and the cell maintained by base station 402b and base station 402c is an unlicensed cell.

The base station 402a to which the licensed cell belongs is used to implement functions such as initial access and cell handover of the terminal device 403.

The base station 402b or the base station 402c to which the unlicensed cell belongs is used to implement data transmission with the terminal device 403. The base station 402b is only described as an example.

In order to implement the cell search, the terminal device 403 obtains the cell identifier of the license-free cell, and performs operations such as subsequent cell reselection, camping, random access, etc., the base station 402b needs to pass the cell identifier of the maintained unlicensed cell. The sync signal is broadcast out.

Since the LAA-NR system adopts both the LAA technology and the NR technology, the base station 402b needs to use the LBT mechanism for the channel on the unlicensed carrier (the working channel of the unlicensed cell) before transmitting the synchronization signal. After detecting and satisfying the channel access condition, the synchronization signal can be transmitted on the channel by using a certain synchronization signal transmission manner.

In the process of monitoring the synchronization signal:

The base station 402b is configured to detect a channel on the unlicensed carrier used by the license-free cell, and when detecting that the channel is idle, according to the sending manner of the synchronization signal indicated by the synchronization signal configuration information of the license-free cell, occupying Transmitting, by the channel, a synchronization signal, and transmitting a channel detection result to the controller 401;

The controller 401 is configured to: after receiving the channel detection result, carry the identifier of the unlicensed carrier and the synchronization signal configuration information used by the license-free cell in the interception indication information, and send the information to the terminal device 403. .

After receiving the interception indication information, the terminal device 403 may monitor the synchronization on the channel on the unlicensed carrier according to the manner in which the synchronization signal of the license-free cell indicated by the synchronization signal configuration information is sent. signal. Finally, the terminal device 403 can receive and read the system message of the unlicensed cell based on the monitored synchronization signal, thereby implementing subsequent operations such as cell reselection, camping, random access, and the like.

In the above mobile communication system, since the controller receives the channel detection result, the terminal is sent to the terminal The device sends the interception indication information, that is, the controller sends the interception indication information after the base station detects that the channel is idle, instructing the terminal device to monitor the synchronization signal, and therefore, the method provided by the embodiment of the present application provides The mobile communication system, the controller can accurately notify the terminal device in the system when to listen to the synchronization signal, can prevent the terminal device from being able to determine when to monitor the synchronization signal, and can also reduce the long-term monitoring synchronization of the terminal device. Power consumption caused by the signal; in addition, since the identifier of the license-free carrier and the synchronization signal configuration information are included in the interception indication information in the controller, the terminal device may configure the information indication according to the synchronization signal The manner of transmitting the synchronization signal of the unlicensed cell, the synchronization signal is monitored in the channel on the unlicensed carrier. Therefore, the controller may also use the monitoring indication information by using the mobile communication system provided by the embodiment of the present application. Notifying the terminal device how to monitor the synchronization signal, and ensuring the terminal setting Can accurately monitor the synchronization signal. In summary, the controller may send the monitoring indication information to the terminal device to notify the terminal device when and how to monitor the synchronization signal, thereby improving the monitoring efficiency of the terminal device to monitor the synchronization signal, and further The access performance and service performance of the terminal device are improved.

Optionally, the controller 401 may be a separate physical device having a wireless communication function, and is capable of communicating with the base station and the terminal device in the LAA-NR system.

Optionally, the controller 401 can also be integrated in the base station 402 of the LAA-NR system. Since the controller 401 needs to communicate with the terminal device 403 (send monitoring indication information) before the terminal device 403 receives the synchronization signal of the license-free cell, the controller 401 can be integrated in the base station. In 402a, the interception indication information is sent to the terminal device 403 by using the wireless communication function of the base station 402a.

It is to be understood that the architecture of the foregoing mobile communication system described in the embodiments of the present application is for the purpose of more clearly illustrating the technical solutions of the embodiments of the present application, and does not constitute a limitation of the technical solutions provided by the embodiments of the present application. The technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems, as the architecture of the mobile communication system evolves and new services emerge.

The embodiment of the present application provides a method for monitoring a synchronization signal, which may be, but is not limited to, applicable to a mobile communication system as shown in FIG. 4. Referring to FIG. 5, the process of the method includes:

S501: The base station detects a channel on the unlicensed carrier used by the license-free cell, where the unlicensed cell is a cell that uses the unlicensed carrier maintained by the base station.

Optionally, the base station is a base station that maintains an unlicensed cell, such as the base station 402b or the base station 402c in the mobile communication system shown in FIG. In addition, the base station may maintain one cell, that is, the unlicensed cell; or the base station may maintain multiple cells, and the plurality of cells include the unlicensed cell.

Optionally, the base station may perform detection on the channel by using a traditional LBE mechanism.

For example, the base station may use the LBT mechanism of the LBE to detect the channel, and the specific process is as follows:

The base station performs CCA detection on the channel, and if the channel is detected to be idle, the channel can be accessed;

If detecting that the channel is busy, the base station performs ECCA detection: the base station randomly generates an integer N in the set value range [1, q], and N is a CCA detection backoff number;

The base station needs to access the channel after the detection result of the subsequent N times of CCA detection is that the channel is idle.

Optionally, the base station may also perform detection on the channel by using other methods in the LBT mechanism, for example, a frame detection method based on a frame structure. In addition, the base station may also adopt other conventional channel detection mechanisms, which is not limited in this application.

Optionally, before S501, the base station may determine the unlicensed carrier of the unlicensed cell by:

The first mode is: in a scenario where the controller allocates the unlicensed carrier to the unlicensed cell maintained by the base station, the controller sends an identifier of the unlicensed carrier to the base station; The controller receives the identifier of the license-free carrier, and determines the unlicensed carrier according to the identifier of the license-free carrier.

In the above manner, the base station may determine the unlicensed carrier of the unlicensed cell, so that the channel on the unlicensed carrier may be detected.

In the foregoing first mode, optionally, the controller allocates the unlicensed carrier to the base station by using the following steps:

Optionally, the traffic may be represented by a load condition of the license-free cell or a number of terminal devices that have accessed the unlicensed cell.

For example, when the traffic volume in the unlicensed cell is higher than a set traffic threshold, the controller may allocate, for the unlicensed cell, m unlicensed carriers, when the traffic in the unlicensed cell is low. The controller may allocate n unlicensed carriers for the unlicensed cell, where m>n, when the traffic threshold is set.

For another example, when the controller determines that the unlicensed cell uses the unlicensed carrier history, the number of times the unlicensed cell uses the unlicensed carrier x exceeds the number of times using other unlicensed carriers, the control The device may preferentially allocate the unlicensed carrier x to the license-exempt cell.

For another example, when the controller determines the received history of the channel detection result of the license-free cell, the channel detection result of receiving the unlicensed carrier y is idle more than the channel detection result of receiving other unlicensed carriers. For the number of idle times, the controller may preferentially allocate the unlicensed carrier y to the unlicensed cell.

For another example, when the controller determines that the remaining capacity of the license-free cell is higher than a set capacity threshold, the controller may allocate, for the unlicensed cell, 1 unlicensed carrier, when the unlicensed cell When the remaining capacity is lower than the set capacity threshold, the controller may allocate s unlicensed carriers for the unlicensed cell, where l>s.

In an optional implementation manner, in the process of allocating the unlicensed carrier to the license-free cell, the controller may set a priority according to the foregoing four factors until the allocation of the license-free cell The unlicensed carrier is good.

The controller allocates the unlicensed carrier to the base station in the foregoing manner, which may improve the utilization of the unlicensed carrier and improve the probability that the base station accesses the channel on the unlicensed carrier.

In an optional implementation manner, the controller may allocate an unlicensed carrier to all the unlicensed cells in the mobile communication system by using the foregoing manner. In this way, the controller can globally arrange the unlicensed carrier competition from the entire mobile communication system, reduce the probability that different license-free cells compete for the same unlicensed carrier (competition conflict), thereby improving the utilization of the unlicensed carrier, and accessing the base station. Probability of the channel on the unlicensed carrier.

S502: The base station determines synchronization signal configuration information of the license-free cell, where the synchronization signal configuration information is used to indicate a manner in which the synchronization signal of the unlicensed cell is sent.

Optionally, the base station may perform S502 by:

The first mode is: in a scenario where the base station stores the correspondence between the identifier of the cell that is maintained by the base station and the configuration information of the synchronization signal, the base station may determine, according to the correspondence between the identifier of the stored cell and the configuration information of the synchronization signal. The synchronization signal configuration information corresponding to the identifier of the license-free cell.

The second mode is: in the scenario that the base station stores the correspondence between the identifier of the unlicensed carrier and the synchronization signal configuration information, the base station may determine, according to the correspondence between the identifier of the stored unlicensed carrier and the synchronization signal configuration information. The synchronization signal configuration information corresponding to the identifier of the license-free carrier.

In the above manner, the base station can quickly and accurately determine the synchronization signal configuration information.

Optionally, the description of the synchronization signal configuration information in the preamble indicates that the synchronization signal configuration information has the following at least two implementation manners:

The first implementation manner: the synchronization signal configuration information includes: the size and beam direction of the SS block, the size and period of the SS burst, and the size and period of the SS burst set.

With the first implementation manner, the base station may obtain the foregoing information included in the synchronization signal configuration information, so that the base station may subsequently configure each information in the information according to the synchronization signal. , send a sync signal.

The second implementation manner is: the synchronization signal configuration information is a synchronization signal configuration template identifier, where the synchronization signal configuration template identifier is used to determine a synchronization signal configuration template, where the synchronization signal configuration template includes: SS block size and beam Direction, SS burst size and period, SS burst set size and period.

In the foregoing second implementation manner, the controller maintains at least one synchronization signal configuration template, and each synchronization signal configuration template includes an SS block size and a beam direction, an SS burst size and a period, and an SS burst set size and The values of the above information included in the different synchronization signal configuration templates are different. The base station may determine, according to the identifier of the synchronization signal configuration template, a corresponding one synchronization signal configuration template.

In the second implementation manner, the base station may determine the synchronization signal configuration template by determining the synchronization signal configuration information, and further obtain the foregoing information included therein, so that the base station may subsequently follow the The synchronization signal is transmitted by synchronizing the information in the configuration information.

In addition, since the synchronization signal configuration template identifier is smaller than the information included in the synchronization signal configuration template, the synchronization signal configuration information is transmitted between the controller and the base station. In the scenario, the information overhead of the synchronization signal configuration information transmitted by the controller and the base station may be reduced, and the transmission efficiency when the controller and the base station transmit the synchronization signal configuration information may be improved. In addition, when the controller sends the synchronization signal configuration information to the terminal device, the information overhead of the monitoring indication information may be reduced, and the transmission efficiency of the controller to transmit the monitoring indication information is improved.

S503: The base station determines, according to the detection that the channel is idle, according to a transmission manner of a synchronization signal indicated by the synchronization signal configuration information, occupies the channel transmission synchronization signal, and sends a channel detection result to the controller.

Correspondingly, the controller receives the channel detection result of the license-free cell from the base station, where the channel detection result is used to notify the controller that the license-free cell uses the unlicensed carrier The channel is idle.

Optionally, when the controller is a base station other than the base station, the base station and the controller may communicate through an Xn interface, for example, the base station may send a channel to the controller by using an Xn interface. The detection result may be: the controller may also send information such as an identifier of the license-free cell to the base station through the Xn interface.

Optionally, when the controller is an independent physical device with wireless communication function, the base station may communicate with the controller by using a wireless connection or a physical connection between the base station and the controller. .

S504: The controller determines synchronization signal configuration information of the license-free cell, where the synchronization signal configuration information is used to indicate a manner of sending the synchronization signal of the license-free cell.

Optionally, the controller may determine configuration information of the synchronization signal in the following two manners:

The first mode: the channel detection result sent by the base station to the controller includes the synchronization signal configuration information, and therefore, the controller receives the channel of the license-free cell from the base station. After the detection result, the synchronization signal configuration information included in the channel detection result may be acquired.

In the first manner, the base station may notify the controller of the manner in which the synchronization signal of the unlicensed cell is sent, so that the controller may notify the terminal device in the mobile communication system.

The second mode: the controller determines, according to the correspondence between the identifier of the stored cell and the synchronization signal configuration information, the synchronization signal configuration information corresponding to the identifier of the license-free cell;

In a third mode, the controller determines the synchronization signal configuration information corresponding to the identifier of the license-free carrier according to the correspondence between the identifier of the stored license-free carrier and the synchronization signal configuration information.

Optionally, when the controller and the base station independently determine the synchronization signal configuration information of the license-free cell, the same manner (such as the second mode or the third mode described above) may be used. In this way, it can be ensured that the synchronization signal configuration information of the unlicensed cell determined by the controller and the base station is the same.

Optionally, the controller may determine the synchronization signal configuration information when the unlicensed carrier is allocated for the license-free cell, and send the synchronization signal configuration information and the identifier of the unlicensed carrier to The base station is configured to implement a manner of transmitting a synchronization signal of the unlicensed cell.

S505: The controller generates interception indication information that includes the identifier of the unlicensed carrier used by the license-free cell and the synchronization signal configuration information, and sends the interception indication information to the terminal device.

Correspondingly, the terminal device receives the interception indication information from the controller.

Optionally, when performing S505, the controller may broadcast the monitoring indication information by using the following steps:

The controller may send, to the terminal device, broadcast signaling, Radio Resource Control (RRC) signaling, and Media Access Control (MAC) layer signaling that carries the interception indication information. Or physical layer control signaling.

Correspondingly, the terminal device receives, from the controller, broadcast signaling, RRC signaling, MAC layer signaling, or physical layer control signaling that carries the interception indication information.

Through the above steps, the terminal device may receive the monitoring indication information, thereby starting to monitor the synchronization signal, and determining, by using the synchronization signal configuration information in the monitoring indication information, how to send the synchronization signal, thereby determining how to monitor The synchronization signal.

Optionally, the interception indication information may further include an identifier of the license-exempt cell to notify the cell of the unlicensed carrier used by the terminal device.

S506: The terminal device monitors a synchronization signal in a channel on the unlicensed carrier corresponding to the identifier of the unlicensed carrier according to the synchronization signal configuration information.

As can be seen from the above description of S502, the synchronization signal configuration information has at least two implementations.

When the synchronization signal configuration information is the first implementation manner, the terminal device performs S506 by using the following steps:

The terminal device monitors an SS burst Set in the channel according to the size and period of the SS burst set in the synchronization signal configuration information;

Monitoring the SS burst in the SS burst set according to the size and period of the SS burst in the synchronization signal configuration information;

Listening to the SS burst according to the size and beam direction of the SS block in the synchronization signal configuration information The SS block obtains the synchronization signal in the SS block.

When the synchronization signal configuration information is the second implementation manner, the terminal device performs S506 by using the following steps:

Determining, by the terminal device, the template identifier according to the synchronization signal, and determining the synchronization signal configuration template corresponding to the synchronization signal configuration template identifier;

The terminal device monitors an SS burst set in the channel according to the size and period of the SS burst set in the synchronization signal configuration template; and

Monitoring the SS burst in the SS burst set according to the size and period of the SS burst in the synchronization signal configuration template;

Obtaining the SS block in the SS burst according to the size and beam direction of the SS block, and obtaining the synchronization signal in the SS block.

The synchronization signal configuration template maintained by the terminal device is the same as the synchronization signal configuration template maintained by the base station, so that the synchronization device configuration module determined by the terminal device and the base station may be the same.

In the method for monitoring a synchronization signal provided by the embodiment of the present application, the controller sends the interception indication information to the terminal device after receiving the channel detection result, that is, the controller determines the After detecting that the channel is idle, the base station sends the interception indication information, instructing the terminal device to monitor the synchronization signal. Therefore, by using the scheme, the controller can accurately notify the terminal device in the system when to monitor the synchronization signal. Preventing the terminal device from being able to determine when the synchronization signal is being monitored, and reducing the power consumption caused by the terminal device listening to the synchronization signal for a long time; and additionally, the identifier and the identifier of the unlicensed carrier are included in the interception indication information. The synchronization signal configuration information, so the terminal device can monitor the synchronization signal on the channel on the unlicensed carrier according to the transmission manner of the synchronization signal of the license-free cell indicated by the synchronization signal configuration information, and therefore, In the solution, the controller may further notify the terminal setting by using the monitoring indication information. How to monitor the synchronization signal to ensure that the terminal can accurately monitor the synchronization signal. In summary, the controller may send the monitoring indication information to the terminal device to notify the terminal device when and how to monitor the synchronization signal, thereby improving the monitoring efficiency of the terminal device to monitor the synchronization signal, thereby further The access performance and service performance of the terminal device are improved.

In a practical application, the mobile communication system shown in FIG. 4 can perform the above-mentioned monitoring method of the synchronization signal for each of the license-free cells, so that the terminal device in the mobile communication system can determine when and how to listen to the license-free license. The synchronization signal of the cell can improve the monitoring efficiency of the terminal device to monitor the synchronization signal, thereby further improving the access performance and service performance of the terminal device.

Based on the foregoing embodiment, an embodiment of the method for monitoring a synchronization signal is provided in the embodiment of the present application. Referring to FIG. 6, the example may be, but is not limited to, being applicable to the mobile communication system shown in FIG. The N license-free cells are included: CELL1, CELL2, ... CELLN, and the base stations for maintaining the N license-free cells are respectively the base station 1, the base station 2, and the base station N. For the sake of clarity of the drawing, FIG. 6 is only a schematic drawing. The base station 1 and the base station N are out, and other base stations are omitted. As shown in the figure, the flow of the example includes:

S601: The controller allocates an unlicensed carrier for the unlicensed cell maintained by each base station. As shown, the controller allocates an unlicensed carrier 1 for CELL1 maintained by the base station 1, ..., and assigns an unlicensed carrier N to the CELLN maintained by the base station N.

Optionally, the controller may allocate an unlicensed carrier for each license-exempt cell according to at least one of: a traffic volume in each unlicensed cell, a history of using the unlicensed carrier for each license-exempt cell, The history of the channel detection results of each of the unlicensed cells received, and the remaining capacity of each of the unlicensed cells.

In this way, the controller can globally arrange the unlicensed carrier competition from the entire mobile communication system, reduce the probability that different license-free cells compete for the same unlicensed carrier (competition conflict), thereby improving the utilization of the unlicensed carrier, and accessing the base station. Probability of the channel on the unlicensed carrier.

S602: The controller sends, to each base station, an identifier of an unlicensed carrier allocated for the unlicensed cell maintained by the base station. As shown, the controller transmits to the base station 1 an unlicensed carrier 1 assigned to CELL1, and the controller transmits to the base station N an unlicensed carrier N allocated for CELLN.

Optionally, the controller may allocate multiple unlicensed carriers to one unlicensed cell. For example, the controller allocates the unlicensed carrier 1 and the unlicensed carrier 2 allocated to the unlicensed cell CELL2 maintained by the base station 2, and then the controller needs to send the CELL2 to the base station 2 when performing S602. Unlicensed carrier 1 and unlicensed carrier 2.

S603: Each base station detects the channel on the unlicensed carrier used by the unlicensed cell maintained by each base station. As shown, the base station 1 detects channel 1 on the unlicensed carrier 1 used by CELL1, and the base station N detects the channel N on the unlicensed carrier N used by CELLN.

S604: Each base station determines synchronization signal configuration information of the unlicensed cell maintained by each base station. As shown, the base station 1 determines the synchronization signal configuration information 1 of CELL1, and the base station N determines the synchronization signal configuration information N of the CELLN.

Since the base station can use different synchronous signal transmission modes on different unlicensed carriers. Continuing with the base station 2 as an example, the base station 2 determines that the synchronization signal configuration information 2 of the CELL 2 includes synchronization signal configuration information for the unlicensed carrier 1 and synchronization signal configuration information for the unlicensed carrier 2.

S605: At least one of the N base stations determines that when the channel is idle, according to the transmission manner of the synchronization signal indicated by the determined synchronization signal configuration information, the occupied channel transmits a synchronization signal, and sends a channel detection result to the controller. The channel detection result is used to notify the controller that the channel on the unlicensed carrier used by the unlicensed cell maintained by the base station is idle.

As shown in the figure, the base station 1 determines that when the channel 1 is idle, according to the transmission mode of the synchronization signal indicated by the synchronization signal configuration information 1, the channel 1 transmits the synchronization signal of CELL1; and the base station N determines that the channel 1 is idle, according to the synchronization. The transmission mode of the synchronization signal indicated by the signal configuration information 1 occupies the synchronization signal of the channel 1 to transmit CELL1.

Certainly, when the base station 2 determines that the channel 3 of the unlicensed carrier 1 is detected to be idle, the channel 3 transmits the synchronization signal of the CELL2 according to the transmission mode of the synchronization signal indicated by the synchronization signal configuration information for the unlicensed carrier 1; the base station 2 determines that the detection is detected. When the channel 4 of the unlicensed carrier 2 is idle, the synchronization signal of the CELL2 is occupied by the channel 4 in accordance with the transmission method of the synchronization signal indicated by the synchronization signal configuration information for the unlicensed carrier 2.

Optionally, the channel detection result sent by any one of the base stations includes the synchronization signal configuration information determined by the base station. As shown in the figure, the channel detection result 1 transmitted by the base station 1 includes synchronization signal configuration information 1; the channel detection result N transmitted by the base station N includes synchronization signal configuration information N. Of course, the channel detection result 2 transmitted by the base station 2 includes the synchronization signal configuration information 2.

S606: The controller determines synchronization signal configuration information of the license-free cell according to the channel detection result of the received license-free cell. For example, the controller may determine the synchronization signal configuration information 1 of the CELL1 included therein according to the channel detection result 1, and determine the synchronization signal configuration information N of the CELLN included therein according to the channel detection result N.

S607: The controller generates monitoring indication information, and broadcasts the monitoring indication information to a terminal device in the mobile communication system. The interception indication information includes an unlicensed carrier identifier used by the unlicensed cell corresponding to the received channel detection result, and synchronization signal configuration information of the license-free cell.

Since different base stations determine that the time of the respective detected channels is different, different base stations are directed to the controller. The time to send channel detection results is also different. The controller may generate the monitoring indication information according to the channel detection result received within a set time (such as within a set time period after performing S602 or within each indication period after S602), when the controller performs S607. The interception indication information includes an unlicensed carrier identifier used by the unlicensed cell corresponding to the channel detection result received in the set time, and synchronization signal configuration information of the license-free cell.

For example, the controller receives the channel detection result sent by the base station 1, the base station 2, and the base station N in a certain indication period, and the content included in the interception indication information is:

Unlicensed carrier 1, synchronization signal configuration information 1, synchronization signal configuration information for synchronization carrier 1 in synchronization signal configuration information 2;

Unlicensed carrier 2, synchronization signal configuration information for the unlicensed carrier 2 in the synchronization signal configuration information 2;

Unlicensed carrier N, synchronization signal configuration information N.

Optionally, when the synchronization signal configuration information is a synchronization signal configuration template identifier, the content included in the interception indication information may be represented by Table 1:

Table 1

免许可载波的标识Unlicensed carrier identification	同步信号配置模板标识Synchronization signal configuration template identification
免许可载波1Unlicensed carrier 1	同步信号配置模板1Synchronization signal configuration template 1
免许可载波1Unlicensed carrier 1	同步信号配置模板3Synchronization signal configuration template 3
免许可载波2Unlicensed carrier 2	同步信号配置模板2Sync signal configuration template 2
免许可载波NUnlicensed carrier N	同步信号配置模板NSynchronization Signal Configuration Template N

Among them, the second and third lines are for CELL2.

As shown in Table 1, the cell that uses the unlicensed carrier cannot be determined intuitively. Therefore, the interception indication information may further include the identifier of the cell, as shown in Table 2:

Table 2

小区的标识Cell identity	免许可载波的标识Unlicensed carrier identification	同步信号配置模板标识Synchronization signal configuration template identification
CELL1CELL1	免许可载波1Unlicensed carrier 1	同步信号配置模板1Synchronization signal configuration template 1
CELL2CELL2	免许可载波1Unlicensed carrier 1	同步信号配置模板3Synchronization signal configuration template 3
CELL2CELL2	免许可载波2Unlicensed carrier 2	同步信号配置模板2Sync signal configuration template 2
CELLNCELLN	免许可载波NUnlicensed carrier N	同步信号配置模板NSynchronization Signal Configuration Template N

S608: The terminal device monitors the synchronization signal in a channel on the unlicensed carrier corresponding to the synchronization signal configuration information according to any synchronization signal configuration information in the monitoring indication information. As shown in the figure, the terminal device can monitor the synchronization signal of CELLi in channel i according to the synchronization signal configuration information i, and the value range of i is [1, N].

For example, when the content in the interception indication information is as shown in Table 1 or Table 2, the terminal device may monitor the synchronization signal of CELL1 in channel 1 on the unlicensed carrier 1 according to the synchronization signal configuration 1.

For a specific process of monitoring the synchronization signal, refer to the description of S506 in the foregoing embodiment, and details are not described herein again.

Optionally, the controller may perform the monitoring method of the synchronization signal according to a set execution period. Optionally, after the S606, the controller may add a channel detection result of each unlicensed cell received in the execution period to a history record of the channel detection result of the corresponding license-free cell, so that the A history of channel detection results of each of the unlicensed cells received, an unlicensed carrier is allocated for each of the unlicensed cells.

The controller may send the monitoring indication information to the terminal device to notify the terminal device when and how to monitor synchronization signals of multiple cells in the mobile communication system, thereby improving the synchronization signal. The terminal device monitors the monitoring efficiency of the synchronization signal, thereby further improving the accessibility of the terminal device. Energy and business performance.

Based on the above embodiment, the embodiment of the present application further provides a controller, which can be applied to the mobile communication system shown in FIG. 4, and can implement the monitoring of the synchronization signal in the embodiment shown in FIG. 5. The controller 700 includes: a receiving unit 701, a processing unit 702, and a sending unit 703, where

The receiving unit 701 is configured to receive, by the base station, a channel detection result of the license-free cell, where the channel detection result is used to notify the controller that the channel on the unlicensed carrier used by the license-exempt cell is idle, and the unlicensed cell is a cell maintained by the base station using an unlicensed carrier;

The processing unit 702 is configured to determine synchronization signal configuration information of the license-free cell, where the synchronization signal configuration information is used to indicate a manner in which the synchronization signal of the unlicensed cell is sent;

Generating, by the interception indication information, the identifier of the unlicensed carrier used by the license-free cell and the synchronization signal configuration information;

The sending unit 703 is configured to send the interception indication information to the terminal device.

Optionally, the processing unit 702 is further configured to: after the receiving unit 701 receives the channel detection result, allocate the unlicensed carrier to the unlicensed cell maintained by the base station;

The sending unit 703 is further configured to send the identifier of the license-free carrier to the base station.

Optionally, the processing unit 702 is specifically configured to: when the unlicensed carrier is allocated to the unlicensed cell:

Allocating the unlicensed carrier to the unlicensed cell according to at least one of the following: a traffic in the unlicensed cell, a history of the unlicensed cell using the unlicensed carrier, and the received unlicensed cell The history of channel detection results, the remaining capacity of the unlicensed cell.

Optionally, the processing unit 702 is specifically configured to: when determining the synchronization signal configuration information:

Determining, according to the correspondence between the identifier of the stored cell and the synchronization signal configuration information, the synchronization signal configuration information corresponding to the identifier of the license-free cell; or

Determining, according to the correspondence between the identifier of the stored unlicensed carrier and the synchronization signal configuration information, the synchronization signal configuration information corresponding to the identifier of the license-free carrier; or

And acquiring the synchronization signal configuration information included in the channel detection result.

Optionally, the synchronization signal configuration information includes: a size and a beam direction of the synchronization signal block SS block, a size and a period of the SS burst of the synchronization signal, and a size and a period of the SS burst set of the synchronization signal batch; or

The synchronization signal configuration information is a synchronization signal configuration template identifier, where the synchronization signal configuration template identifier is used to determine a synchronization signal configuration template, and the synchronization signal configuration template includes: SS block size and beam direction, and SS burst size. And period, the size and period of the SS burst set.

Optionally, the sending unit 703 is specifically configured to: when sending the interception indication information to the terminal device:

And transmitting, to the terminal device, broadcast signaling, radio resource control RRC signaling, media access control MAC layer signaling, or physical layer control signaling, where the interception indication information is carried.

In the above solution, after receiving the channel detection result sent by the base station, the controller sends the interception indication information to the terminal device, that is, the controller determines that the base station detects the After the channel is idle, the interception indication information is sent to the terminal device to monitor the synchronization signal. Therefore, the controller can accurately notify the terminal device in the system when the synchronization signal is monitored, and the terminal device can be avoided. The power consumption caused by the monitoring of the synchronization signal by the terminal device for a long time may be reduced, and the identifier of the unlicensed carrier and the synchronization signal configuration information may be included in the monitoring indication information. So the end The end device can monitor the synchronization signal in the channel on the unlicensed carrier according to the sending manner of the synchronization signal of the unlicensed cell indicated by the synchronization signal configuration information. Therefore, by using the solution, the controller can also The monitoring indication information is used to notify the terminal device how to monitor the synchronization signal, so that the terminal device can accurately monitor the synchronization signal. In summary, the controller may send the monitoring indication information to the terminal device to notify the terminal device when and how to monitor the synchronization signal, thereby improving the monitoring efficiency of the terminal device to monitor the synchronization signal, thereby further The access performance and service performance of the terminal device are improved.

Based on the foregoing embodiment, the embodiment of the present application further provides a base station, where the base station can be applied to the mobile communication system shown in FIG. 4, and can implement the synchronization signal monitoring method in the embodiment shown in FIG. Referring to FIG. 8, the base station 800 includes: a processing unit 801 and a sending unit 802, where

The processing unit 801 is configured to detect a channel on the unlicensed carrier used by the license-free cell, where the unlicensed cell is a cell that uses the unlicensed carrier maintained by the base station;

Determining synchronization signal configuration information of the license-free cell, where the synchronization signal configuration information is used to indicate a transmission mode of the synchronization signal of the license-free cell;

The sending unit 802 is configured to: when the processing unit 801 determines that the channel is idle, according to the sending manner of the synchronization signal indicated by the synchronization signal configuration information, occupy the channel to send a synchronization signal, and send a channel to the controller. Test results.

Optionally, the base station 800 further includes: a receiving unit 803, configured to receive an identifier of the license-free carrier from the controller, before the processing unit 801 detects a channel on the unlicensed carrier,

The processing unit 801 is specifically configured to: determine the unlicensed carrier according to the identifier of the unlicensed carrier;

The processing unit 801 is further configured to allocate the unlicensed carrier to the unlicensed cell before detecting the channel on the unlicensed carrier.

Optionally, the processing unit 801 is specifically configured to: when determining the synchronization signal configuration information:

Obtaining the preset synchronization signal configuration information.

Optionally, the channel detection result further includes the synchronization signal configuration information.

In the above solution, after detecting that the channel is idle, the base station sends a channel detection result to the controller to notify the controller that the channel on the unlicensed carrier used by the license-free cell is idle. In this way, the controller may instruct the terminal device to start monitoring the synchronization signal of the license-free cell by sending the interception indication information to the terminal device. Therefore, the controller can accurately notify the terminal device in the mobile communication system when to listen to the synchronization signal, and can prevent the terminal device from determining whether to monitor the synchronization signal, and can also reduce the terminal device. The power consumption caused by monitoring the sync signal for a long time.

Based on the above embodiment, the embodiment of the present application further provides a terminal device, which can be applied to the mobile communication system shown in FIG. 4, and can implement monitoring of the synchronization signal in the embodiment shown in FIG. The method, as shown in FIG. 9, the terminal device 900 includes: a receiving unit 901 and a processing unit 902, where

The receiving unit 901 is configured to receive, from the controller, the interception indication information, where the interception indication information includes an identifier of the unlicensed carrier used by the license-free cell and synchronization signal configuration information, where the license-free cell is a cell that uses the unlicensed carrier, The synchronization signal configuration information is used to indicate a manner of transmitting the synchronization signal of the license-free cell;

The processing unit 902 is configured to monitor, according to the synchronization signal configuration information, a synchronization signal in a channel on the unlicensed carrier corresponding to the identifier of the unlicensed carrier.

Optionally, the synchronization signal configuration information includes: a size and a beam direction of the synchronization signal block SS block, a size and a period of the synchronization signal batch SS burst, and a size and a period of the synchronization signal batch collection SS burst set;

The processing unit 902 is specifically configured to: when listening to the synchronization signal in the channel according to the synchronization signal configuration information:

Observing an SS burst Set in the channel according to a size and a period of the SS burst set in the synchronization signal configuration information; and

And simulating the SS block in the SS burst according to the size and beam direction of the SS block in the synchronization signal configuration information, to obtain the synchronization signal in the SS block.

Optionally, the synchronization signal configuration information is a synchronization signal configuration template identifier, where the synchronization signal configuration template identifier is in one-to-one correspondence with a synchronization signal configuration template, where the synchronization signal configuration template includes: an SS block size and a beam direction. , SS burst size and period, SS burst set size and period;

Determining, according to the synchronization signal configuration template identifier, the synchronization signal configuration template corresponding to the synchronization signal configuration template identifier;

Obtaining an SS burst Set in the channel according to a size and a period of the SS burst set in the synchronization signal configuration template; and

Optionally, the receiving unit 901 is specifically configured to: when receiving the interception indication information from the controller,

Receiving broadcast signaling, radio resource control RRC signaling, media access control MAC layer signaling, or physical layer control signaling carrying the interception indication information from the controller.

In the above solution, after receiving the interception indication information sent by the controller, the terminal device starts to monitor the synchronization signal, and, after the monitoring indication information is determined by the controller, the base station detects that the channel is idle. The device can be configured to determine when to listen to the synchronization signal by using the monitoring indication information, and the terminal device can be prevented from determining whether to monitor the synchronization signal, and the terminal device can be reduced for a long time. The power consumption of the synchronization signal is monitored; and the identifier of the unlicensed carrier and the synchronization signal configuration information are included in the interception indication information, so the terminal device may perform the exemption according to the synchronization signal configuration information. The manner of transmitting the synchronization signal of the licensed cell, the synchronization signal is monitored in the channel on the unlicensed carrier. Therefore, the controller may further notify the terminal device how to monitor the synchronization signal by using the monitoring indication information. , ensuring that the terminal device can accurately monitor the synchronization signal. In summary, the controller may send the monitoring indication information to the terminal device to notify the terminal device when and how to monitor the synchronization signal, thereby improving the monitoring efficiency of the terminal device to monitor the synchronization signal, thereby further The access performance and service performance of the terminal device are improved.

It should be noted that the division of the unit in the embodiment of the present application is schematic, and is only a logical function division. In actual implementation, there may be another division manner. The functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

Based on the above embodiments, the embodiment of the present application further provides a computer storage medium, where the software program stores a software program, and the software program can implement the synchronization provided by the foregoing embodiment when being read and executed by one or more processors. Signal monitoring method. The computer storage medium may include: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, and the program code may be stored. Medium.

Based on the above embodiment, the embodiment of the present application further provides a computer program product including instructions, when it is run on a computer, causing the computer to perform the monitoring method of the synchronization signal provided by the foregoing embodiment.

Based on the above embodiment, the embodiment of the present application further provides a controller for implementing a synchronization signal monitoring method as shown in FIG. 5, having the function of the controller 700 as shown in FIG. 7. Referring to FIG. 10, the controller 1000 includes a transceiver 1001, a processor 1002, and a memory 1003. The transceiver 1001, the processor 1002, and the memory 1003 are connected to each other.

Optionally, the transceiver 1001, the processor 1002, and the memory 1003 are connected to each other by a bus 1004. The bus 1004 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in FIG. 10, but it does not mean that there is only one bus or one type of bus.

The transceiver 1001 is configured to receive and transmit data, and implement communication with other devices (such as a base station, a terminal device, etc.).

The processor 1002 is configured to implement a method for monitoring a synchronization signal as shown in FIG. 5, including:

Receiving, by the transceiver 1001, a channel detection result of the license-free cell from the base station, where the channel detection result is used to notify the controller that the channel on the unlicensed carrier used by the license-free cell is idle, and the license-free cell is a cell maintained by the base station using an unlicensed carrier;

And generating interception indication information including the identifier of the unlicensed carrier used by the license-free cell and the synchronization signal configuration information, and sending the interception indication information to the terminal device by using the transceiver 1001.

Optionally, the processor 1002 is further configured to:

Allocating the unlicensed carrier to the unlicensed cell maintained by the base station before receiving the channel detection result by the transceiver 1001;

The identifier of the license-free carrier is transmitted to the base station by the transceiver 1001.

Optionally, the processor 1002 is specifically configured to: when the unlicensed carrier is allocated to the unlicensed cell:

Optionally, the processor 1002 is specifically configured to: when determining the synchronization signal configuration information:

Optionally, when the transceiver 1001 sends the interception indication information to the terminal device, the processor 1002 is specifically configured to:

Broadcasting signaling, radio resource control RRC signaling, media access control MAC layer signaling, or physical layer control signaling carrying the interception indication information is sent to the terminal device by the transceiver 1001.

The memory 1003 is configured to store program instructions and the like. In particular, program instructions may include program code, the program code including computer operating instructions. The memory 1003 may include a random access memory (RAM), and may also include a non-volatile memory such as at least one disk storage. The processor 1002 executes the program instructions stored in the memory 1003 to implement the above functions, thereby implementing the synchronization signal monitoring method provided by the above embodiments.

In the above solution, after receiving the channel detection result sent by the base station, the controller sends the interception indication information to the terminal device, that is, the controller determines that the base station detects the After the channel is idle, the interception indication information is sent to the terminal device to monitor the synchronization signal. Therefore, the controller can accurately notify the terminal device in the system when the synchronization signal is monitored, and the terminal device can be avoided. The power consumption caused by the monitoring of the synchronization signal by the terminal device for a long time may be reduced, and the identifier of the unlicensed carrier and the synchronization signal configuration information may be included in the monitoring indication information. Therefore, the terminal device may monitor the synchronization signal in the channel on the unlicensed carrier according to the sending manner of the synchronization signal of the license-free cell indicated by the synchronization signal configuration information, and therefore, by using the solution, The controller may further notify, by using the monitoring indication information, how the terminal device monitors the synchronization signal. The device ensures that the terminal can accurately monitor the synchronization signal. In summary, the controller may send the monitoring indication information to the terminal device to notify the terminal device when and how to monitor the synchronization signal, thereby improving the monitoring efficiency of the terminal device to monitor the synchronization signal, and further The access performance and service performance of the terminal device are improved.

Based on the foregoing embodiment, the embodiment of the present application further provides a base station, where the base station is configured to implement a synchronization signal monitoring method as shown in FIG. 5, and has the function of the base station 800 as shown in FIG. 8. Referring to FIG. 11, the base station 1100 includes a transceiver 1101, a processor 1102, and a memory 1103. Wherein the transceiver 1101, the processor 1102 and the memory 1103 are connected to each other.

Optionally, the transceiver 1101, the processor 1102, and the memory 1103 are connected to each other through a bus 1104. The bus 1104 can be a PCI bus or an EISA bus or the like. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 11, but it does not mean that there is only one bus or one type of bus.

The transceiver 1101 is configured to receive and send data to implement communication with other devices (such as a controller, a terminal device).

The processor 1102 is configured to implement a method for monitoring a synchronization signal as shown in FIG. 5, including:

Detecting a channel on an unlicensed carrier used by the license-exempt cell, the unlicensed cell being a cell maintained by the base station using an unlicensed carrier;

Determining, when detecting that the channel is idle, transmitting a synchronization signal according to the synchronization signal configuration information, using the transceiver 1101 to occupy the channel transmission synchronization signal, and transmitting a channel to the controller through the transceiver 1101. Test results.

Optionally, the processor 1102 is further configured to:

Before detecting the channel on the unlicensed carrier, receiving, by the transceiver 1101, an identifier of the license-free carrier from the controller, and determining the unlicensed carrier according to the identifier of the unlicensed carrier ;or

Distributing the unlicensed carrier for the unlicensed cell before detecting the channel on the unlicensed carrier.

Optionally, the processor 1102 is specifically configured to: when determining the synchronization signal configuration information:

Obtaining the preset synchronization signal configuration information.

The memory 1103 is configured to store program instructions and the like. In particular, program instructions may include program code, the program code including computer operating instructions. Memory 1103 may include RAM and may also include non-volatile memory, such as at least one disk storage. The processor 1102 executes the program instructions stored in the memory 1103 to implement the above functions, thereby implementing the method for monitoring the synchronization signal provided by the foregoing embodiment.

In the above solution, after detecting that the channel is idle, the base station sends a channel detection result to the controller to notify the controller that the channel on the unlicensed carrier used by the license-free cell is idle. In this way, the controller may send the monitoring indication information to the terminal device, and instruct the terminal device to start monitoring the synchronization information of the license-free cell. number. Therefore, the controller can accurately notify the terminal device in the mobile communication system when to listen to the synchronization signal, and can prevent the terminal device from determining whether to monitor the synchronization signal, and can also reduce the terminal device. The power consumption caused by monitoring the sync signal for a long time.

Based on the above embodiment, the embodiment of the present application further provides a terminal device, which is used to implement a synchronization signal monitoring method as shown in FIG. 5, and has the function of the terminal device 900 as shown in FIG. 9. Referring to FIG. 12, the terminal device 1200 includes a transceiver 1201, a processor 1202, and a memory 1203. The transceiver 1201, the processor 1202, and the memory 1203 are connected to each other.

Optionally, the transceiver 1201, the processor 1202, and the memory 1203 are connected to each other through a bus 1204. The bus 1204 may be a PCI bus or an EISA bus or the like. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 12, but it does not mean that there is only one bus or one type of bus.

The transceiver 1201 is configured to receive and send data to implement communication with other devices (such as a controller, a terminal device).

The processor 1202 is configured to implement a method for monitoring a synchronization signal as shown in FIG. 5, including:

Receiving, by the transceiver 1201, the monitoring indication information, where the monitoring indication information includes an identifier of an unlicensed carrier used by the license-free cell and synchronization signal configuration information, where the license-free cell is a cell using the unlicensed carrier, The synchronization signal configuration information is used to indicate a manner of transmitting the synchronization signal of the license-free cell;

And synchronizing the synchronization signal in a channel on the unlicensed carrier corresponding to the identifier of the unlicensed carrier according to the synchronization signal configuration information.

The processor 1202 is configured to: when the synchronization signal is monitored in the channel according to the synchronization signal configuration information, specifically:

Optionally, the processor 1202 is configured to: when receiving the interception indication information from the controller by using the transceiver 1201, specifically:

Receiving, by the transceiver 1201, the broadcast signaling, the radio resource control RRC signaling, the medium access control MAC layer signaling, or the physical layer control signaling that carries the interception indication information from the controller.

The memory 1203 is configured to store program instructions and the like. In particular, program instructions may include program code, the program code including computer operating instructions. The memory 1203 may include RAM and may also include non-volatile memory, such as at least one disk storage. The processor 1202 executes the program instructions stored in the memory 1203 to implement the above functions, thereby implementing the method for monitoring the synchronization signals provided by the foregoing embodiments.

In the above solution, after receiving the interception indication information sent by the controller, the terminal device starts to monitor the synchronization signal, and, after the monitoring indication information is determined by the controller, the base station detects that the channel is idle. The device can be configured to determine when to listen to the synchronization signal by using the monitoring indication information, and the terminal device can be prevented from determining whether to monitor the synchronization signal, and the terminal device can be reduced for a long time. The power consumption of the synchronization signal is monitored; and the identifier of the unlicensed carrier and the synchronization signal configuration information are included in the interception indication information, so the terminal device may perform the exemption according to the synchronization signal configuration information. The manner of transmitting the synchronization signal of the licensed cell, the synchronization signal is monitored in the channel on the unlicensed carrier. Therefore, the controller may further notify the terminal device how to monitor the synchronization signal by using the monitoring indication information. , ensuring that the terminal device can accurately monitor the synchronization letter . In summary, the controller may send the monitoring indication information to the terminal device to notify the terminal device when and how to monitor the synchronization signal, thereby improving the monitoring efficiency of the terminal device to monitor the synchronization signal, and further The access performance and service performance of the terminal device are improved.

In summary, the embodiment of the present application provides a synchronization signal monitoring method and device, in which a base station in an LAA-NR system detects a channel on an unlicensed carrier used by an unlicensed cell, and detects When the channel is idle, according to the transmission mode of the synchronization signal indicated by the synchronization signal configuration information of the license-free cell, occupying the channel transmission synchronization signal, and transmitting a channel detection result to the controller; After the channel detection result is performed, the identifier of the unlicensed carrier used by the license-free cell and the synchronization signal configuration information are carried in the interception indication information and sent to the terminal device; the terminal device receives the interception indication After the information, the synchronization signal may be monitored on the channel on the unlicensed carrier according to the manner in which the synchronization signal of the unlicensed cell indicated by the synchronization signal configuration information is transmitted.

In the above solution, after the controller receives the channel detection result, the interception indication information is sent to the terminal device, that is, the controller sends after determining that the base station detects that the channel is idle. The monitoring indication information indicates that the terminal device monitors the synchronization signal. Therefore, by using the solution, the controller can accurately notify the terminal device in the system when to listen to the synchronization signal, and can prevent the terminal device from being unable to determine when The phenomenon of monitoring the synchronization signal may also reduce the power consumption caused by the terminal device listening for the synchronization signal for a long time; and further, the identifier of the unlicensed carrier and the synchronization signal configuration information are included in the monitoring indication information, The terminal device may monitor the synchronization signal in the channel on the unlicensed carrier according to the sending manner of the synchronization signal of the license-free cell indicated by the synchronization signal configuration information, and therefore, by using the scheme, the controller may further Notifying the terminal device how to monitor the synchronization signal by using the monitoring indication information, thereby ensuring The terminal apparatus can accurately monitor the synchronization signal. In summary, the controller may notify the end by sending a monitoring indication information to the terminal device. When and how the terminal device monitors the synchronization signal, the monitoring efficiency of the terminal device to monitor the synchronization signal can be improved, and the access performance and service performance of the terminal device are further improved.

Those skilled in the art will appreciate that embodiments of the present application can be provided as a method, system, or computer program product. Thus, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment in combination of software and hardware. Moreover, the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

It is apparent that those skilled in the art can make various modifications and variations to the embodiments of the present application without departing from the scope of the embodiments of the present application. Thus, it is intended that the present invention cover the modifications and variations of the embodiments of the present invention.

Claims

A method for monitoring a synchronization signal, comprising:

The controller receives a channel detection result of the license-free cell from the base station, where the channel detection result is used to notify the controller that the channel on the unlicensed carrier used by the license-exempt cell is idle, and the unlicensed cell maintains the base station a cell using an unlicensed carrier;

The controller determines synchronization signal configuration information of the license-free cell, where the synchronization signal configuration information is used to indicate a manner of sending a synchronization signal of the license-free cell;

The controller generates interception indication information including the identifier of the unlicensed carrier used by the license-free cell and the synchronization signal configuration information, and sends the interception indication information to the terminal device.
The method of claim 1, wherein before the controller receives the channel detection result, the method further comprises:

The controller allocates the unlicensed carrier to the unlicensed cell maintained by the base station;

The controller sends an identifier of the license-free carrier to the base station.
The method of claim 2, wherein the controller assigns the unlicensed carrier to the license-free cell, including:

The controller allocates the unlicensed carrier to the unlicensed cell according to at least one of the following: a traffic volume in the unlicensed cell, a history of the license-free cell using the unlicensed carrier, and a received location A history of channel detection results of the license-exempt cell and remaining capacity of the license-exempt cell.
The method according to any one of claims 1-3, wherein the controller determines the synchronization signal configuration information, including:

Determining, by the controller, the synchronization signal configuration information corresponding to the identifier of the license-free cell according to the correspondence between the identifier of the stored cell and the synchronization signal configuration information; or

Determining, by the controller, the synchronization signal configuration information corresponding to the identifier of the unlicensed carrier according to a correspondence between the identifier of the stored unlicensed carrier and the synchronization signal configuration information; or

The controller acquires the synchronization signal configuration information included in the channel detection result.
A method according to any one of claims 1 to 4, wherein

The synchronization signal configuration information includes: a size and a beam direction of the synchronization signal block SS block, a size and a period of the SS burst of the synchronization signal, and a size and a period of the SS burst set of the synchronization signal batch; or

The synchronization signal configuration information is a synchronization signal configuration template identifier, where the synchronization signal configuration template identifier is used to determine a synchronization signal configuration template, and the synchronization signal configuration template includes: SS block size and beam direction, and SS burst size. And period, the size and period of the SS burst set.
The method of any one of the preceding claims, wherein the controller sends the interception indication information to the terminal device, including:

The controller sends, to the terminal device, broadcast signaling, radio resource control RRC signaling, media access control MAC layer signaling, or physical layer control signaling that carries the interception indication information.
A method for monitoring a synchronization signal, comprising:

The base station detects, on the unlicensed carrier used by the unlicensed cell, the unlicensed cell is a cell that uses the unlicensed carrier maintained by the base station;

Determining, by the base station, synchronization signal configuration information of the license-free cell, where the synchronization signal configuration information is used to indicate a method for transmitting a synchronization signal of the license-free cell;

When the base station determines that the channel is idle, according to the transmission manner of the synchronization signal indicated by the synchronization signal configuration information, the base station occupies the channel transmission synchronization signal, and sends a channel detection result to the controller.
The method of claim 7, wherein before the detecting, by the base station, the channel on the unlicensed carrier, the method further comprises:

Receiving, by the base station, an identifier of the license-free carrier from the controller, and determining the unlicensed carrier according to the identifier of the unlicensed carrier; or

The base station allocates the unlicensed carrier to the license-free cell.
The method according to claim 7 or 8, wherein the determining, by the base station, the synchronization signal configuration information comprises:

Determining, by the base station, the synchronization signal configuration information corresponding to the identifier of the license-free cell according to the correspondence between the identifier of the stored cell and the synchronization signal configuration information; or

Determining, by the base station, the synchronization signal configuration information corresponding to the identifier of the unlicensed carrier according to the correspondence between the identifier of the stored unlicensed carrier and the synchronization signal configuration information; or

The base station acquires preset synchronization signal configuration information.
The method according to any one of claims 7 to 9, wherein the channel detection result further includes the synchronization signal configuration information.
A method according to any of claims 7-10, wherein

The synchronization signal configuration information includes: a size and a beam direction of the synchronization signal block SS block, a size and a period of the SS burst of the synchronization signal, and a size and a period of the SS burst set of the synchronization signal batch; or

The synchronization signal configuration information is a synchronization signal configuration template identifier, where the synchronization signal configuration template identifier is used to determine a synchronization signal configuration template, and the synchronization signal configuration template includes: SS block size and beam direction, and SS burst size. And period, the size and period of the SS burst set.
A method for monitoring a synchronization signal, comprising:

The terminal device receives the monitoring indication information from the controller, where the monitoring indication information includes an identifier of the license-free carrier used by the license-free cell and synchronization signal configuration information, where the license-free cell is a cell using the unlicensed carrier, and the synchronization signal configuration information is used. Means for indicating a synchronization signal of the unlicensed cell;

And the terminal device monitors the synchronization signal in a channel on the unlicensed carrier corresponding to the identifier of the unlicensed carrier according to the synchronization signal configuration information.
The method according to claim 12, wherein the synchronization signal configuration information comprises: a size and a beam direction of the synchronization signal block SS block, a size and a period of the synchronization signal batch SS burst, and a synchronization signal batch collection SS burst set Size and period;

The terminal device monitors the synchronization signal in the channel according to the synchronization signal configuration information, including:

The terminal device monitors an SS burst Set in the channel according to the size and period of the SS burst set in the synchronization signal configuration information;

Monitoring the SS burst in the SS burst set according to the size and period of the SS burst in the synchronization signal configuration information;

And simulating the SS block in the SS burst according to the size and beam direction of the SS block in the synchronization signal configuration information, to obtain the synchronization signal in the SS block.
The method according to claim 12, wherein said synchronization signal configuration information is a synchronization signal The template identifier is configured, wherein the synchronization signal configuration template identifier is in one-to-one correspondence with the synchronization signal configuration template, where the synchronization signal configuration template includes: SS block size and beam direction, SS burst size and period, and SS burst set size. And cycle;

The terminal device monitors the synchronization signal in the channel according to the synchronization signal configuration information, including:

Determining, by the terminal device, the template identifier according to the synchronization signal, and determining the synchronization signal configuration template corresponding to the synchronization signal configuration template identifier;

The terminal device monitors an SS burst set in the channel according to the size and period of the SS burst set in the synchronization signal configuration template; and

Monitoring the SS burst in the SS burst set according to the size and period of the SS burst in the synchronization signal configuration template;

Obtaining the SS block in the SS burst according to the size and beam direction of the SS block, and obtaining the synchronization signal in the SS block.
The method according to any one of claims 12 to 14, wherein the receiving, by the terminal device, the monitoring indication information from the controller comprises:

The terminal device receives broadcast signaling, radio resource control RRC signaling, media access control MAC layer signaling, or physical layer control signaling that carries the interception indication information from the controller.
A controller, comprising:

a memory for storing program instructions;

a transceiver for receiving and transmitting data;

a processor for invoking the program instructions stored in the memory, performing the following steps:

Receiving, by the transceiver, a channel detection result of the unlicensed cell from the base station, where the channel detection result is used to notify the controller that the channel on the unlicensed carrier used by the license-free cell is idle, and the unlicensed cell is a cell maintained by the base station using an unlicensed carrier;

Determining synchronization signal configuration information of the license-free cell, where the synchronization signal configuration information is used to indicate a transmission mode of the synchronization signal of the license-free cell;

And generating interception indication information including the identifier of the unlicensed carrier used by the license-free cell and the synchronization signal configuration information, and sending the interception indication information to the terminal device by using the transceiver.
The controller according to claim 16, wherein the processor is further configured to:

Allocating the unlicensed carrier to the unlicensed cell maintained by the base station before receiving the channel detection result by the transceiver;

The identifier of the license-free carrier is transmitted to the base station by the transceiver.
The controller according to claim 17, wherein the processor, when the unlicensed carrier is allocated to the unlicensed cell, is specifically used to:

Allocating the unlicensed carrier to the unlicensed cell according to at least one of the following: a traffic in the unlicensed cell, a history of the unlicensed cell using the unlicensed carrier, and the received unlicensed cell The history of channel detection results, the remaining capacity of the unlicensed cell.
The controller according to any one of claims 16 to 18, wherein the processor is specifically configured to: when determining the synchronization signal configuration information:

Determining, according to the correspondence between the identifier of the stored cell and the synchronization signal configuration information, the synchronization signal configuration information corresponding to the identifier of the license-free cell; or

Determining, according to the correspondence between the identifier of the stored unlicensed carrier and the synchronization signal configuration information, the synchronization signal configuration information corresponding to the identifier of the license-free carrier; or

And acquiring the synchronization signal configuration information included in the channel detection result.
A controller according to any one of claims 16 to 19, wherein

The synchronization signal configuration information includes: a size and a beam direction of the synchronization signal block SS block, a size and a period of the SS burst of the synchronization signal, and a size and a period of the SS burst set of the synchronization signal batch; or

The synchronization signal configuration information is a synchronization signal configuration template identifier, where the synchronization signal configuration template identifier is used to determine a synchronization signal configuration template, and the synchronization signal configuration template includes: SS block size and beam direction, and SS burst size. And period, the size and period of the SS burst set.
The controller according to any one of claims 16 to 20, wherein the processor, when the interception indication information is sent to the terminal device by the transceiver, is specifically used to:

Transmitting, by the transceiver, the broadcast signaling, the radio resource control RRC signaling, the medium access control MAC layer signaling, or the physical layer control signaling that carries the interception indication information to the terminal device.
A base station, comprising:

a memory for storing program instructions;

a transceiver for receiving and transmitting data;

a processor for invoking the program instructions stored in the memory, performing the following steps:

Detecting a channel on an unlicensed carrier used by the license-exempt cell, the unlicensed cell being a cell maintained by the base station using an unlicensed carrier;

Determining synchronization signal configuration information of the license-free cell, where the synchronization signal configuration information is used to indicate a transmission mode of the synchronization signal of the license-free cell;

Determining, when detecting that the channel is idle, transmitting a synchronization signal according to the channel occupied by the synchronization signal according to the transmission mode of the synchronization signal indicated by the synchronization signal configuration information, and transmitting a channel detection result to the controller through the transceiver .
The base station according to claim 22, wherein the processor is further configured to:

Before detecting the channel on the unlicensed carrier, receiving, by the transceiver, an identifier of the unlicensed carrier from the controller, and determining the unlicensed carrier according to the identifier of the unlicensed carrier; or

Distributing the unlicensed carrier for the unlicensed cell before detecting the channel on the unlicensed carrier.
The base station according to claim 22 or 23, wherein the processor is specifically configured to: when determining the synchronization signal configuration information:

Determining, according to the correspondence between the identifier of the stored cell and the synchronization signal configuration information, the synchronization signal configuration information corresponding to the identifier of the license-free cell; or

Determining, according to the correspondence between the identifier of the stored unlicensed carrier and the synchronization signal configuration information, the synchronization signal configuration information corresponding to the identifier of the license-free carrier; or

Obtaining the preset synchronization signal configuration information.
The base station according to any one of claims 22 to 24, wherein the channel detection result further includes the synchronization signal configuration information.
A base station according to any of claims 22-25, characterized in that

The synchronization signal configuration information includes: a size and a beam direction of the synchronization signal block SS block, and a synchronization signal batch The size and period of the SS burst, the size and period of the SS burst set of the synchronization signal batch; or

The synchronization signal configuration information is a synchronization signal configuration template identifier, where the synchronization signal configuration template identifier is used to determine a synchronization signal configuration template, and the synchronization signal configuration template includes: SS block size and beam direction, and SS burst size. And period, the size and period of the SS burst set.
A terminal device, comprising:

a memory for storing program instructions;

a transceiver for receiving and transmitting data;

a processor for invoking the program instructions stored in the memory, performing the following steps:

Receiving, by the transceiver, the interception indication information, where the interception indication information includes an identifier of an unlicensed carrier used by the license-free cell and synchronization signal configuration information, where the license-free cell is a cell using the unlicensed carrier, and the synchronization The signal configuration information is used to indicate a manner of sending the synchronization signal of the license-free cell;

And synchronizing the synchronization signal in a channel on the unlicensed carrier corresponding to the identifier of the unlicensed carrier according to the synchronization signal configuration information.
The terminal device according to claim 27, wherein the synchronization signal configuration information comprises: a size and a beam direction of the synchronization signal block SS block, a size and a period of the synchronization signal batch SS burst, and a synchronization signal batch collection SS burst set Size and period;

The processor is configured to: when listening to the synchronization signal in the channel according to the synchronization signal configuration information, specifically:

Observing an SS burst Set in the channel according to a size and a period of the SS burst set in the synchronization signal configuration information; and

Monitoring the SS burst in the SS burst set according to the size and period of the SS burst in the synchronization signal configuration information;

And simulating the SS block in the SS burst according to the size and beam direction of the SS block in the synchronization signal configuration information, to obtain the synchronization signal in the SS block.
The terminal device according to claim 27, wherein the synchronization signal configuration information is a synchronization signal configuration template identifier, wherein the synchronization signal configuration template identifier is in one-to-one correspondence with a synchronization signal configuration template, and the synchronization signal configuration The template includes: SS block size and beam direction, SS burst size and period, SS burstset size and period;

The processor is configured to: when listening to the synchronization signal in the channel according to the synchronization signal configuration information, specifically:

Determining, according to the synchronization signal configuration template identifier, the synchronization signal configuration template corresponding to the synchronization signal configuration template identifier;

Obtaining an SS burst Set in the channel according to a size and a period of the SS burst set in the synchronization signal configuration template; and

Monitoring the SS burst in the SS burst set according to the size and period of the SS burst in the synchronization signal configuration template;

Obtaining the SS block in the SS burst according to the size and beam direction of the SS block, and obtaining the synchronization signal in the SS block.
The terminal device according to any one of claims 27 to 29, wherein the processor is configured to: when receiving the interception indication information from the controller by the transceiver, specifically:

Receiving, by the transceiver, broadcast signaling, radio resource control RRC signaling, media access control MAC layer signaling, or physical layer control signaling that carries the interception indication information from the controller.