WO2019000544A1

WO2019000544A1 - Cell handover method and device for grant-free uplink transmission

Info

Publication number: WO2019000544A1
Application number: PCT/CN2017/094910
Authority: WO
Inventors: 庄宏成; 韩云博
Original assignee: 华为技术有限公司
Priority date: 2017-06-27
Filing date: 2017-07-28
Publication date: 2019-01-03
Also published as: CN109691212B; CN109691212A

Abstract

The present application provides a cell handover method and device for grant-free uplink transmission. A source base station carries handover type information in a handover request message to be sent to a target base station, the handover type information being used to indicate that a terminal device supports grant-free transmission, and to indicate characteristics of a grant-free service of the terminal device, so as to acquire first grant-free transmission configuration information. The first grant-free transmission configuration information comprises information about a first grant-free transmission resource to be used to perform a grant-free transmission between the terminal device and the target base station and configuration information of a first uplink air interface transmission parameter. The source base station further sends a handover command message to the terminal device, the handover command message comprising the first grant-free transmission configuration information. The terminal device acquires the first grant-free transmission configuration information to be used for communication with the target base station in advance, thereby reducing blind detection of grant-free services of the terminal device by the target base station and further ensuring proper reception of the grant-free services.

Description

Cell switching method and device for unlicensed uplink transmission

This application claims the priority of the Chinese Patent Application filed on June 27, 2017, the Chinese Patent Application No. PCT Application No. PCT Application No. In this application.

Technical field

The present application relates to communication technologies, and in particular, to a cell handover method and device for grant-free uplink transmission.

Background technique

At present, the existing mobile communication system mainly adopts the request-authorization-based uplink data transmission method, but with the increasing application scenarios, terminal types and application types, the number of terminal devices will be in the evolution process of the future mobile communication system. Explosive growth, users will have extremely high requirements for network latency in specific application scenarios. In this case, the traditional request-authorized uplink data transmission method will no longer be applicable due to higher delay and signaling overhead.

Compared with the traditional request-authorization-based transmission method, in the unlicensed transmission method, the user directly uses the specific resource to send the uplink data, and does not need to go through the process from the service request to the base station uplink authorization, and therefore, the network delay and signaling There is a big advantage in terms of overhead. In the unlicensed transmission method, there is also a cell handover scenario. In the existing method, the source base station performs a cell handover decision, and sends a handover request to the target base station, where the handover request message carries the contention transmission selected by the terminal device for unauthorized transmission. The Contention Transmission Unit (CTU) and the code resources used by the terminal equipment. After receiving the handover request message of the source base station, the target base station determines whether the terminal device uses the contention transmission unit and code carried in the handover request message according to the load condition of the target base station and the contention transmission unit and the code resource used by the terminal device. The resource accesses the target base station; if the terminal is allowed to use the contention transmission unit and the code resource carried in the handover request message to access the target base station, the handover request acknowledgement message is instructed to indicate that the terminal device uses the contention transmission unit carried in the handover request message and The code resource performs the unlicensed transmission; if the terminal device does not agree to use the contention transmission unit and the code resource carried in the handover request message to access the target base station, the terminal device is instructed to indicate the new contention transmission unit and the code resource in the handover request acknowledgement message. .

However, in the prior art, the target base station only transmits the contention of the contention unit and the code resource to the terminal device, and does not send the air interface parameter to the terminal device. The air interface parameters used in different scenarios and services are different, and thus the target cannot be guaranteed. The base station correctly receives data of the unlicensed service.

Summary of the invention

The present application provides a cell handover method and device for unlicensed uplink transmission, which ensures correct reception of unauthorized services.

The first aspect of the present application provides a cell handover method for unlicensed uplink transmission, including:

The source base station sends a handover request message to the target base station, where the handover request message includes handover type information, where the handover type information is used to indicate that the terminal device supports unauthorized transmission, and characteristics of the unlicensed service of the terminal device;

The source base station receives a handover response sent by the target base station, where the handover response includes first unlicensed transmission configuration information, where the first unlicensed transmission configuration information includes: the terminal device performs unauthorized transmission with the target base station. The information of the first unlicensed transmission resource and the configuration information of the first uplink air interface transmission parameter, where the information of the first unlicensed transmission resource and the configuration information of the first uplink air interface transmission parameter are Determining the characteristics of the non-authorized service;

The source base station sends a handover command message to the terminal device, where the handover command message includes the first unlicensed transmission configuration information.

Optionally, the handover response further includes a transmit power of the pilot signal of the target base station, where the handover command message further includes a timing advance of the terminal device at the target base station, where the method further include:

The source base station determines a timing advance of the terminal device at the target base station according to a transmit power of a pilot signal of the target base station.

Optionally, the handover response further includes a timing advance of the terminal device at the target base station.

Optionally, the handover response and the handover command message further include an uplink synchronization resource of the target base station.

The second aspect of the present application provides a cell handover method for unlicensed uplink transmission, including:

The terminal device receives the handover command message sent by the source base station, where the handover command message includes the first unlicensed transmission configuration information, where the first unlicensed transmission configuration information includes: the terminal device performs unauthorized transmission with the target base station. The information of the first unlicensed transmission resource used and the configuration information of the first uplink air interface transmission parameter

The terminal device sends an unauthorized service to the target base station according to the first unlicensed transmission configuration information.

Optionally, the handover command message includes: a timing advance of the terminal device at the target base station, where the timing advance is determined by the source base station or the target base station;

The terminal device sends the unlicensed service to the target base station according to the first unlicensed transmission configuration information, including:

The terminal device sends an unauthorized service to the target base station according to the first unlicensed transmission configuration information and the timing advance.

Optionally, the handover command message includes: an uplink synchronization resource of the target base station;

Before the terminal device sends the non-authorized service to the target base station according to the first unlicensed transmission configuration information, the method further includes:

The terminal device sends a signal on an uplink synchronization resource of the target base station;

Receiving, by the terminal device, a timing advance of the terminal device that is sent by the target base station in the target base station, where the time advance of the target device is an uplink synchronization of the target base station according to the terminal device at the target base station The signal sent on the resource is determined;

The terminal device sends an unauthorized service to the target base station according to the first unlicensed transmission configuration information and a timing advance of the terminal device at the target base station.

The third aspect of the present application provides a cell handover method for unlicensed uplink transmission, including:

The target base station receives a handover request message sent by the source base station, where the handover request message includes handover type information, where the handover type information is used to indicate that the terminal device supports unauthorized transmission, and characteristics of the unlicensed service of the terminal device;

The target base station determines the first unlicensed transmission configuration information according to the characteristics of the unlicensed service, where the first unlicensed transmission configuration information includes: the first unlicensed transmission use by the terminal device and the target base station Information of the unlicensed transmission resource and configuration information of the first uplink air interface transmission parameter;

The target base station sends a handover response to the source base station, where the handover response includes the first unlicensed transmission configuration information.

Optionally, the handover request further includes an RSRP of the target base station measured by the terminal device, where the handover response further includes a timing advance of the terminal device at the target base station, where the method is Also includes:

Determining, by the target base station, a timing advance of the terminal device at the target base station according to the RSRP of the target base station measured by the terminal device.

Optionally, the handover response further includes a transmit power of the pilot signal of the target base station or an uplink synchronization resource of the target base station.

A fourth aspect of the present application provides a source base station, including:

a sending module, configured to send a handover request message to the target base station, where the handover request message includes handover type information, where the handover type information is used to indicate that the terminal device supports unauthorized transmission, and characteristics of the unlicensed service of the terminal device ;

a receiving module, configured to receive a handover response sent by the target base station, where the handover response includes first unlicensed transmission configuration information, where the first unlicensed transmission configuration information includes: the terminal device and the target base station are not authorized Transmitting the information of the first unlicensed transmission resource and the configuration information of the first uplink air interface transmission parameter, where the information of the first unlicensed transmission resource and the configuration information of the first uplink air interface transmission parameter are Determining the characteristics of the unauthorized service;

The sending module is further configured to send a handover command message to the terminal device, where the handover command message includes the first unlicensed transmission configuration information.

Optionally, the handover response further includes a transmit power of a pilot signal of the target base station, where the handover command message further includes a timing advance of the terminal device at the target base station, where the source base station Also includes:

And a determining module, configured to determine, according to a transmit power of the pilot signal of the target base station, a timing advance of the terminal device at the target base station.

A fifth aspect of the present application provides a terminal device, including:

a receiving module, configured to receive a handover command message sent by the source base station, where the handover command message includes the first Unauthorized transmission configuration information, where the first unlicensed transmission configuration information includes: information about the first unlicensed transmission resource used by the terminal device and the target base station for unauthorized transmission, and configuration information of the first uplink air interface transmission parameter ;

And a sending module, configured to send an unlicensed service to the target base station according to the first unlicensed transmission configuration information.

The sending module is specifically configured to: send an unlicensed service to the target base station according to the first unlicensed transmission configuration information and the timing advance.

The sending module is further configured to send a signal on an uplink synchronization resource of the target base station;

The receiving module is further configured to receive a timing advance of the terminal device that is sent by the target base station at the target base station, where a timing advance of the target device is that the target base station is in the target according to the terminal device Determining a signal transmitted on an uplink synchronization resource of the base station;

The sending module sends an unlicensed service to the target base station according to the first unlicensed transmission configuration information, specifically, according to the first unlicensed transmission configuration information and the time advance of the terminal device at the target base station. Sending an unauthorized service to the target base station.

A sixth aspect of the present application provides a target base station, including:

a receiving module, configured to receive a handover request message sent by the source base station, where the handover request message includes handover type information, where the handover type information is used to indicate that the terminal device supports unauthorized transmission, and the unlicensed service of the terminal device characteristic;

a processing module, configured to determine, according to characteristics of the unlicensed service, first unlicensed transmission configuration information, where the first unlicensed transmission configuration information includes: an unlicensed transmission used by the terminal device and the target base station Information about an unlicensed transmission resource and configuration information of a first uplink air interface transmission parameter;

And a sending module, configured to send a handover response to the source base station, where the handover response includes the first unlicensed transmission configuration information.

Optionally, the handover request further includes an RSRP of the target base station measured by the terminal device, where the handover response further includes a timing advance of the terminal device at the target base station, and the processing module Also used for:

Determining, according to the RSRP of the target base station measured by the terminal device, a timing advance of the terminal device at the target base station.

The seventh aspect of the present application provides a source base station source base station, including:

And a transmitter, configured to send a handover request message to the target base station, where the handover request message includes handover type information, where the handover type information is used to indicate that the terminal device supports unauthorized transmission, and characteristics of the unlicensed service of the terminal device ;

a receiver, configured to receive a handover response sent by the target base station, where the handover response includes first unlicensed transmission configuration information, where the first unlicensed transmission configuration information includes: the terminal device performs with the target base station The information of the first unlicensed transmission resource used by the unlicensed transmission and the configuration information of the first uplink air interface transmission parameter, where the information of the first unlicensed transmission resource and the configuration information of the first uplink air interface transmission parameter are the target Determining, by the base station, according to characteristics of the unlicensed service;

The transmitter is further configured to send a handover command message to the terminal device, where the handover command message includes the first unlicensed transmission configuration information.

And a processor, configured to determine, according to a transmit power of the pilot signal of the target base station, a timing advance of the terminal device at the target base station.

The eighth aspect of the present application provides a terminal device, including:

a receiver, configured to receive a handover command message sent by the source base station, where the handover command message includes first unlicensed transmission configuration information, where the first unlicensed transmission configuration information includes: the terminal device performs with the target base station The information of the first unlicensed transmission resource used by the unlicensed transmission and the configuration information of the first uplink air interface transmission parameter;

And a transmitter, configured to send an unlicensed service to the target base station according to the first unlicensed transmission configuration information.

The transmitter is specifically configured to: send an unlicensed service to the target base station according to the first unlicensed transmission configuration information and the timing advance.

The transmitter is further configured to send a signal on an uplink synchronization resource of the target base station;

The receiver is further configured to receive a timing advance of the terminal device that is sent by the target base station at the target base station, where a timing advance of the target device is that the target base station is in the target according to the terminal device Determining a signal transmitted on an uplink synchronization resource of the base station;

The transmitter sends an unlicensed service to the target base station according to the first unlicensed transmission configuration information, specifically, according to the first unlicensed transmission configuration information and the time advance of the terminal device at the target base station. Sending an unauthorized service to the target base station.

A ninth aspect of the present application provides a target base station, including:

a receiver, configured to receive a handover request message sent by the source base station, where the handover request message includes handover type information, where the handover type information is used to indicate that the terminal device supports unauthorized transmission, and the unlicensed service of the terminal device characteristic;

a processor, configured to determine, according to characteristics of the unlicensed service, first unlicensed transmission configuration information, where the first unlicensed transmission configuration information includes: an unlicensed transmission used by the terminal device and the target base station Information about an unlicensed transmission resource and configuration information of a first uplink air interface transmission parameter;

And a transmitter, configured to send a handover response to the source base station, where the handover response includes the first unlicensed transmission configuration information.

Optionally, the handover request further includes an RSRP of the target base station measured by the terminal device, where the handover response further includes a timing advance of the terminal device at the target base station, where the processor Also used for:

In the first to ninth aspects of the present application, the handover request message further includes second unlicensed transmission configuration information, where the second unlicensed transmission configuration information includes: the terminal device and the source base station perform non- The information of the second unlicensed transmission resource used for the authorization transmission and the configuration information of the second uplink air interface transmission parameter.

Further, the handover request message further includes a buffer status report BSR of the unlicensed service of the terminal device.

In the first to ninth aspects of the present application, the first uplink air interface transmission parameter or the second uplink air interface parameter includes an uplink waveform, a multiple access mode, a modulation and coding mode, a radio frame structure, a power control related parameter, and a sub At least one of a carrier interval and a cyclic prefix CP length.

Optionally, the uplink waveform includes a single carrier discrete Fourier transform spread spectrum orthogonal frequency division multiplexing DFT-S-OFDM or a multi-carrier cyclic prefix orthogonal frequency division multiplexing (CP-OFDM); Include orthogonal frequency division multiple access OFDMA or non-orthogonal multiple access NOMA; the radio frame structure includes a demodulation reference signal DMRS configuration; the power control related parameters include an uplink maximum transmit power, a base station desired receive power level, and a path loss Compensation factor or power adjustment amount.

A tenth aspect of the present application provides a computer readable medium comprising computer executed instructions for causing a source base station to perform the method provided by the first aspect of the present application.

An eleventh aspect of the present application provides a computer readable medium comprising computer executed instructions for causing a terminal device to perform the method provided by the second aspect of the present application.

A twelfth aspect of the present application provides a computer readable medium comprising computer executed instructions for causing a target base station to perform the method provided by the third aspect of the present application.

A thirteenth aspect of the present application provides a system on chip, the system being applicable to a source base station, the system on chip comprising: at least one communication interface, at least one processor, at least one memory, the communication interface, the memory, and The processor is interconnected by a bus that invokes instructions stored in the memory to perform the operations of the source base station in the method provided by the first aspect of the present application.

The fourteenth aspect of the present application provides a system on chip, the system being applicable to a terminal device, the system on chip comprising: at least one communication interface, at least one processor, at least one memory, the communication interface, the memory, and The processor is interconnected by a bus that invokes instructions stored in the memory to perform the operations of the terminal device in the method provided by the second aspect of the present application.

A fifteenth aspect of the present application provides a system on chip, the system being applicable to a target base station, the system on chip comprising: at least one communication interface, at least one processor, at least one memory, the communication interface, the memory, and The processor is interconnected by a bus, the processor invoking instructions stored in the memory to execute the present The operation of the target base station in the method provided by the third aspect is applied.

The cell handover method and device for unlicensed uplink transmission provided by the application, the source base station includes handover type information in the handover request message sent to the target base station, the handover type information is used to indicate that the terminal device supports unauthorized transmission, and the terminal device The non-authorized service is configured to obtain the first unlicensed transmission configuration information, where the first unlicensed transmission configuration information includes information about the first unlicensed transmission resource used by the terminal device and the target base station for unauthorized transmission, and the first uplink air interface transmission parameter The configuration information is sent to the terminal device, where the switch command message includes the first unlicensed transmission configuration information. The terminal device obtains the first unlicensed transmission configuration information used for communication with the target base station in advance, which not only reduces the blind detection of the unlicensed service of the terminal device by the target base station, but also ensures the correct reception of the unauthorized service.

DRAWINGS

1 is a schematic diagram of a network architecture to which an embodiment of the present application is applied;

2 is a flowchart of a cell handover method for unlicensed uplink transmission according to Embodiment 1;

3 is a signaling flowchart of a cell handover method for unlicensed uplink transmission provided by Embodiment 2;

4 is a signaling flowchart of a cell handover method for unlicensed uplink transmission provided in Embodiment 3;

5 is a signaling flowchart of a cell handover method for unlicensed uplink transmission provided in Embodiment 4;

6 is a schematic structural diagram of a source base station according to Embodiment 5;

7 is a schematic structural diagram of a terminal device according to Embodiment 6;

8 is a schematic structural diagram of a target base station according to Embodiment 7;

FIG. 9 is a schematic structural diagram of a source base station according to Embodiment 8.

FIG. 10 is a schematic structural diagram of a terminal device according to Embodiment 9.

FIG. 11 is a schematic structural diagram of a terminal device according to Embodiment 10.

Detailed ways

The present application provides a cell handover method for unlicensed uplink transmission. FIG. 1 is a schematic diagram of a network architecture applicable to an embodiment of the present application. As shown in FIG. 1 , the network architecture includes two base stations: a source base station and a target base station. And the at least one terminal device, where the source base station is the base station currently serving the terminal device, and the target base station is the base station that needs to be switched by the terminal device, and the source cell where the source base station is located and the target cell where the target base station is located may be the same frequency cell, or The inter-frequency cell can also be a different system cell. In the network architecture shown in Figure 1, the source base station and the target base station are two different base stations. It should be noted that the method of the present application can also be applied to the scenario where the source base station and the target base station are the same base station, that is, the source cell and the target cell. Different cells belonging to the same base station.

It should be clarified that the source base station and the target base station mentioned in this application may be base stations of a Global System of Mobile communication (GSM) system or a Code Division Multiple Access (CDMA) system ( Base Transceiver Station (BTS), which can also be a base station (NodeB, NB for short) in the Wideband Code Division Multiple Access (WCDMA) system, or Long Term Evolution (LTE). An evolved NodeB (eNB), an access point (AP), or a relay station in the system may also be a base station (such as a gNB or a transmission point) in a fifth generation mobile communication (5Generation, 5G) system. Transmission Point, TRP)), etc., can also be a cloud radio access network (Cloud Radio Access Wireless controllers in the case of Network, CRAN), and wearable devices or in-vehicle devices. This is not limited here. The 5G system is also called a new wireless communication system, a new access technology (New Radio) or a next generation mobile communication system.

The base station may include an indoor baseband processing unit (BBU) and a remote radio unit (RRU), and the RRU and the antenna feeder system (ie, an antenna) are connected, and the BBU and the RRU may be used as needed. It should be noted that the base station may also adopt other general hardware architectures in a specific implementation process.

The terminal equipment mentioned in this application may be a User Equipment (UE), an access terminal, a UE unit, a UE station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a UE terminal, a terminal, and a wireless device. Communication device, UE proxy or UE device, etc. It can also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), and a wireless communication function. Handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminals in future 5G networks, or terminals in a future evolutionary Public Land Mobile Network (PLMN).

FIG. 2 is a flowchart of a method for cell handover of an unlicensed uplink transmission according to the first embodiment. As shown in FIG. 2, the method provided in this embodiment includes the following steps:

Step S101: The source base station sends a handover request message to the target base station, where the handover request message includes handover type information, where the handover type information is used to indicate that the terminal device supports unauthorized transmission, and the characteristics of the non-authorized service of the terminal device.

The source base station determines that the terminal device needs to perform cell handover, and sends a handover request message to the target base station, where the source base station may determine whether to perform cell handover according to the measurement result of the terminal device, and the measurement result includes signal quality, signal strength, and load of the source base station and the target base station. One or more of the situations. Exemplarily, when the signal quality of the source base station is lower than the first threshold and the signal quality of the target base station is higher than the second threshold, the source base station determines to perform cell handover.

The handover type information is used by the target base station to allocate unlicensed transmission resources used by the terminal device for unauthorized transmission. The source base station may indicate whether the terminal device supports unlicensed transmission by using a handover type indication bit (bit), for example, when the value of the handover type indication bit is 1, indicating that the terminal device supports unauthorized transmission, when the handover type indicates the bit position. A value of 0 indicates that the terminal device does not support unauthorized transmission. The characteristics of the unlicensed service are, for example, a small packet service, a low latency service, and the like. The unlicensed transmission service refers to the service transmitted on the unlicensed transmission resource. The unlicensed transmission resource used by the terminal device is pre-configured by the base station, and the subsequent transmission of the service does not require the unlicensed transmission resource to be requested from the base station.

Optionally, the handover request message further includes second unlicensed transmission configuration information, where the second unlicensed transmission configuration information includes: information about the second unlicensed transmission resource used by the terminal device and the source base station for unauthorized transmission, and the second uplink. Configuration information of the air interface transmission parameters. The information of the second unlicensed transmission resource may be an index of the second unlicensed transmission resource or time-frequency resource information, and the time-frequency resource includes a time domain resource and a frequency domain resource. If the mapping between the index of the unlicensed transmission resource and the time-frequency resource is pre-configured on the base station and the terminal device, the source base station may only carry the index of the second unlicensed transmission resource in the handover request message, and the target base station according to the second non-authorization The index of the transmission resource may determine time-frequency resource information used by the source base station and the terminal for unauthorized transmission. If the mapping between the index of the unlicensed transmission resource and the time-frequency resource is not configured on each base station and the terminal device, the source base station needs to be switched. The request message carries time-frequency resource information used by the source base station and the terminal for unauthorized transmission.

The next-generation mobile communication system needs to support a variety of scenarios and services, and different scenarios and service requirements, such as enhanced mobile broadband (eMBB) services require higher data rates, large-scale inter-machine communication (Massive Machine) Type Communication (MTC) services require a large number of connections, and ultra-Reliable and Low Latency Communication (uRLLC) services require low latency and high reliability. An air interface technology obviously cannot satisfy all scenarios and services. Therefore, the next generation mobile communication system introduces soft air interface technology Soft-AI, so that it can match various services and different application scenarios.

In this embodiment, the second uplink air interface transmission parameter includes at least one of an uplink waveform, a multiple access mode, a modulation and coding mode, a radio frame structure, a power control related parameter, a subcarrier interval, and a Cyclic Prefix (CP) length. . The uplink waveform includes Discrete Fourier Transform Spread Frequency Division Multiple Access (DFT-S-OFDM) or multi-carrier cyclic prefix Orthogonal Frequency Division Multiplexing (Cyclic Prefix Orthogonal) Frequency Division Multiple, CP-OFDM. The multiple access method includes Orthogonal Frequency Division Multiple Access (OFDMA) or Non-Orthogonal Multiple Access (NOMA). The radio frame structure includes demodulation reference. Demodulation Reference Signal (DMRS) configuration. The subcarrier spacing may be 15 kHz, 30 kHz, or the like. The power control related parameters include at least one of an uplink maximum transmit power, a base station expected received power level, a path loss compensation factor, and a power adjustment amount. When the multiple access mode is NOMA, the second uplink air interface transmission parameter further includes at least one of a codebook, a pilot sequence, a spreading sequence, and a power domain superposition pattern.

The configuration information of the second uplink air interface transmission parameter may be an index of the second uplink air interface transmission parameter, and the different indexes correspond to different uplink air interface transmission parameters, and the correspondence between the index and the second uplink air interface transmission parameter is pre-configured on the terminal device and the base station. The configuration information of the second uplink air interface transmission parameter may also be a specific value of the uplink air interface parameter. The uplink waveform and the multiple access mode in the second uplink air interface transmission parameter are semi-static parameters, and the semi-static parameters can be configured through high layer signaling, for example, Radio Resource Control (RRC) signaling. Subcarrier spacing, CP length, radio frame structure, and power control related parameters are dynamic parameters, and dynamic parameters change continuously with time, requiring real-time dynamic update.

If the terminal device is performing an unlicensed service, the handover request message may further include a Buffer Status Report (BSR) of the unlicensed service of the terminal device, where the BSR is used to notify the target base station terminal device of the uplink unlicensed service buffer. The amount of data in the middle.

Step S102: The source base station receives a handover response sent by the target base station, where the handover response includes the first unlicensed transmission configuration information.

The first unlicensed transmission configuration information includes: information about the first unlicensed transmission resource used by the terminal device and the target base station for unauthorized transmission, and configuration information of the first uplink air interface transmission parameter. The first unlicensed transmission configuration information is determined by the target base station according to content included in the handover request message sent by the terminal device.

Exemplarily, when the characteristic of the unlicensed service of the terminal device is a packet service, the target base station may select that the uplink waveform is single carrier (DFT-S-OFDM), the multiple access mode is NOMA, the subcarrier spacing is smaller, and the CP length is shorter. Large unlicensed transmission resources. When the characteristics of the unlicensed service of the terminal device are low-latency services, the target base station may select that the uplink waveform is multi-carrier (CP-OFDM), the multiple access mode is OFDMA, and the sub-carrier spacing is larger. Unlicensed transmission resources with a small CP length.

If the handover request message further includes the BSR and/or the second unlicensed transmission configuration information of the unlicensed service of the terminal device, the target base station may further perform the BSR and/or the second unlicensed transmission configuration information according to the unlicensed service of the terminal device. Determine the first unlicensed transmission configuration information. For example, the target base station learns the current uplink traffic of the terminal device according to the BSR of the unlicensed service of the terminal device, and allocates an unlicensed transmission resource of a suitable size to the terminal device according to the uplink traffic volume. After determining the first unlicensed transmission configuration information, the target base station carries the first unlicensed transmission configuration information in the handover response and sends the information to the source base station.

Step S103: The source base station sends a handover command message to the terminal device, where the handover command message includes the first unlicensed transmission configuration information.

After receiving the handover command information, the terminal device sends an unlicensed service to the target base station according to the first unlicensed transmission configuration information used by the target base station if there is an uplink data transmission request and the unlicensed mode is allowed to perform uplink data transmission.

In this embodiment, the source base station sends a handover request message to the target base station, where the handover request message includes handover type information, where the handover type information is used to indicate that the terminal device supports unauthorized transmission, and the characteristics of the non-authorized service of the terminal device are received. a handover response sent by the target base station, where the handover response includes first unlicensed transmission configuration information, where the first unlicensed transmission configuration information includes: information about the first unlicensed transmission resource used by the terminal device and the target base station for unauthorized transmission, and the first The configuration information of the uplink air interface transmission parameter is sent to the terminal device, where the handover command message includes the first unlicensed transmission configuration information. The terminal device obtains the first unlicensed transmission configuration information of the target base station in advance, which not only reduces the blind detection of the unlicensed service of the terminal device by the target base station, but also ensures the correct reception of the unauthorized service.

On the basis of the first embodiment, FIG. 3 is a signaling flowchart of a method for cell handover of an unlicensed uplink transmission according to the second embodiment. As shown in FIG. 3, the method provided in this embodiment includes the following steps:

Step S201: The source base station determines to perform cell handover on the terminal device.

Step S202: The source base station sends a handover request message to the target base station, where the handover request message includes handover type information and second unlicensed transmission configuration information.

The handover type information is used to indicate that the terminal device supports unauthorized transmission and the characteristics of the unauthorized service of the terminal device. The second unlicensed transmission configuration information includes: information about the second unlicensed transmission resource used by the terminal device and the source base station for unauthorized transmission, and configuration information of the second uplink air interface transmission parameter. If the terminal device is currently performing an unauthorized service, the handover request message may further include a BSR of the unlicensed service of the terminal device.

Step S203: The target base station sends a handover response to the source base station, where the handover response includes the first unlicensed transmission configuration information and the transmission power of the pilot signal of the target base station.

The first unlicensed transmission configuration information includes: information about the first unlicensed transmission resource used by the terminal device and the target base station for unauthorized transmission, and configuration information of the first uplink air interface transmission parameter. The transmit power of the pilot signal of the target base station is used by the source base station to determine the timing advance of the terminal device at the target base station.

Step S204: The source base station determines, according to the transmit power of the pilot signal of the target base station, a timing advance of the terminal device at the target base station.

Specifically, the source base station obtains reference signal receiving power (RSRP) of the source base station, the RSRP of the target base station, the transmit power of the pilot signal of the source base station, and the transmit power of the pilot signal of the target base station according to the measurement by the terminal device. And determining a timing advance of the terminal device at the target base station. Exemplary The time advance of the terminal device at the target base station can be calculated by the following formula:

TA _t,ue =TA _s,ue α(P _pilot,t -RSRP _t,ue )/(P _pilot,s -RSRP _s,ue )

Where RSRP _{s, ue} represents the RSRP of the source base station measured by the terminal device, RSRP _{t, ue} represents the RSRP of the target base station measured by the terminal device, P _{pilot, s} represents the transmission power of the pilot signal of the source base station, P _{pilot, t} represents the transmission power of the pilot signal of the target base station, TA _{s, ue} represents the timing advance of the terminal equipment at the source base station, and α represents the correction parameter of the transmission model of the source base station, which may be set to 1, and α may be sent by the target base station to The source base station may also be obtained by the source base station from the network management system.

Step S205: The source base station sends a handover command message to the terminal device, where the handover command message includes the first unlicensed transmission configuration information and the timing advance of the terminal device at the target base station.

Step S206: The terminal device sends the non-authorized service to the target base station according to the first unlicensed transmission configuration information and the timing advance of the terminal device at the target base station.

After receiving the handover command information, if the terminal device has an uplink data transmission request and allows the unlicensed mode to perform uplink data transmission, the terminal device advances according to the first unlicensed transmission configuration information used by the target base station and the time of the terminal device at the target base station. The amount is sent to the target base station for unauthorized services.

In this embodiment, during the cell handover process, the terminal device obtains the first unlicensed transmission configuration information of the target base station in advance, which not only reduces the blind detection of the non-authorized service of the terminal device by the target base station, but also ensures the non-authorized service. Receive correctly. In addition, the source base station determines, for the terminal device, the timing advance of the terminal device at the target base station, and sends the time advance of the terminal device to the terminal device, so that the terminal device can directly send the uplink after switching to the target base station. Unlicensed services ensure latency and reduce interference within the cell.

On the basis of the first embodiment, FIG. 4 is a signaling flowchart of a cell handover method for unlicensed uplink transmission according to Embodiment 3. As shown in FIG. 4, the method provided in this embodiment includes the following steps:

Step S301: The source base station determines to perform cell handover on the terminal device.

Step S302: The source base station sends a handover request message to the target base station, where the handover request message includes handover type information, second unlicensed transmission configuration information, and an RSRP of the target base station.

The handover type information is used to indicate that the terminal device supports unauthorized transmission and the characteristics of the unauthorized service of the terminal device. The second unlicensed transmission configuration information includes: information about the second unlicensed transmission resource used by the terminal device and the source base station for unauthorized transmission, and configuration information of the second uplink air interface transmission parameter. If the terminal device is currently performing an unauthorized service, the handover request message may further include a BSR of the unlicensed service of the terminal device. The RSRP of the target base station is measured by the terminal device and sent to the source base station.

Step S303: The target base station determines, according to the RSRP of the target base station measured by the terminal device, the time advance of the terminal device at the target base station.

Specifically, the target base station may be configured according to the RSRP of the target base station measured by the terminal device, the RSRP of the target base station measured by the first terminal device served by the target base station, the transmit power of the pilot signal of the target base station, and the first terminal device at the target base station. The amount of time advancement determines the amount of time advancement of the terminal device at the target base station. Exemplarily, the target base station can calculate the timing advance of the terminal device at the target base station according to the following formula:

TA _t,ue =TA _t,ue' (P _pilot,t -RSRP _t,ue )/(P _pilot,t -RSRP _t,ue' )

Where RSRP _{t, ue} represents the RSRP of the target base station measured by the switched terminal device, RSRP _{t, ue '} represents the RSRP of the target base station measured by the first terminal device, and P _{pilot, t} represents the transmission of the pilot signal of the target base station. The power, TA _{t, ue} represents the time advance of the switched terminal device at the target base station, and TA _{t, ue '} represents the time advance of the first terminal device at the target base station.

Step S304: The target base station sends a handover response to the source base station, where the handover response includes the first unlicensed transmission configuration information and the timing advance of the terminal device at the target base station.

The first unlicensed transmission configuration information includes: information about the first unlicensed transmission resource used by the terminal device and the target base station for unauthorized transmission, and configuration information of the first uplink air interface transmission parameter.

Step S305: The source base station sends a handover command message to the terminal device, where the handover command message includes the first unlicensed transmission configuration information and the timing advance of the terminal device at the target base station.

Step S306: The terminal device sends the unlicensed service to the target base station according to the first unlicensed transmission configuration information and the timing advance of the terminal device at the target base station.

In this embodiment, during the cell handover process, the terminal device obtains the first unlicensed transmission configuration information of the target base station in advance, which not only reduces the blind detection of the non-authorized service of the terminal device by the target base station, but also ensures the non-authorized service. Receive correctly. In addition, the target base station further determines, according to the RSRP of the target base station measured by the terminal device, the time advance of the terminal device at the target base station, and sends the time advance of the terminal device to the terminal device, so that the terminal device switches to the target. After the base station, the uplink unlicensed service can be directly sent, which ensures the delay and reduces the interference in the cell.

On the basis of the first embodiment, FIG. 5 is a signaling flowchart of a cell handover method for unlicensed uplink transmission provided in Embodiment 4. As shown in FIG. 5, the method provided in this embodiment includes the following steps:

Step S401: The source base station determines to perform cell handover on the terminal device.

Step S402: The source base station sends a handover request message to the target base station, where the handover request message includes handover type information and second unlicensed transmission configuration information.

Step S403: The target base station sends a handover response to the source base station, where the handover response includes the first unlicensed transmission configuration information and the uplink synchronization resource of the target base station.

Step S404: The source base station sends a handover command message to the terminal device, where the handover command message includes the first unlicensed transmission configuration information and the uplink synchronization resource of the target base station.

Step S405: The terminal device sends a signal on an uplink synchronization resource of the target base station.

After receiving the handover command message, the terminal device sends an information transmission signal to the uplink synchronization resource of the target base station if there is an uplink data transmission request and the unlicensed mode is allowed to perform uplink data transmission.

Step S406: The target base station determines, according to the signal received on the uplink synchronization resource, a timing advance of the terminal device at the target base station,

Step S407: The target base station sends, to the terminal device, a timing advance of the terminal device at the target base station.

Step S408: The terminal device sends the unlicensed service to the target base station according to the first unlicensed transmission configuration information and the timing advance of the terminal device at the target base station.

In this embodiment, during the cell handover process, the terminal device obtains the first unlicensed transmission configuration information of the target base station in advance, which not only reduces the blind detection of the non-authorized service of the terminal device by the target base station, but also ensures the non-authorized service. Receive correctly. In addition, the target base station sends its own uplink synchronization resource to the terminal device, and the terminal device sends a signal in the uplink synchronization resource, and the target base station determines the time advancement of the terminal device at the target base station according to the signal sent on the uplink synchronization resource, and the terminal device is The time advance of the target base station is sent to the terminal device, so that after the terminal device switches to the target base station, the uplink unlicensed service can be directly sent, the delay is ensured, and the interference in the cell is reduced.

FIG. 6 is a schematic structural diagram of a source base station according to Embodiment 5, as shown in FIG. 6, the source base station provided in this embodiment includes:

The sending module 11 is configured to send a handover request message to the target base station, where the handover request message includes handover type information, where the handover type information is used to indicate that the terminal device supports unauthorized transmission, and the non-authorized service of the terminal device characteristic;

The receiving module 12 is configured to receive a handover response sent by the target base station, where the handover response includes first unlicensed transmission configuration information, where the first unlicensed transmission configuration information includes: the terminal device performs non-targeting with the target base station Authorizing the information of the first unlicensed transmission resource and the configuration information of the first uplink air interface transmission parameter, where the information of the first unlicensed transmission resource and the configuration information of the first uplink air interface transmission parameter are the target base station Determined according to characteristics of the unauthorized service;

The sending module 11 is further configured to send a handover command message to the terminal device, where the handover command message includes the first unlicensed transmission configuration information.

Optionally, the handover response further includes a transmit power of a pilot signal of the target base station, where the handover command message further includes a timing advance of the terminal device at the target base station, where the source base station The method further includes a determining module, configured to determine a timing advance of the terminal device at the target base station according to a transmit power of a pilot signal of the target base station.

Optionally, the handover request message further includes second unlicensed transmission configuration information, where the second unlicensed transmission configuration information includes: a second non-authorization of the terminal device and the source base station for unauthorized transmission use. The information of the transmission resource and the configuration information of the second uplink air interface transmission parameter. Further, the handover request message further includes a BSR of the unlicensed service of the terminal device.

Optionally, the first uplink air interface transmission parameter or the second uplink air interface parameter includes an uplink waveform, a multiple access mode, a modulation and coding mode, a radio frame structure, a power control related parameter, a subcarrier interval, and a cyclic prefix CP length. At least one of them. The uplink waveform includes single-carrier DFT-S-OFDM or multi-carrier CP-OFDM; the multiple access mode includes OFDMA or NOMA; the radio frame structure includes a DMRS configuration; and the power control related parameters include an uplink maximum transmission. Power, base station expected received power level, path loss compensation factor or power adjustment.

FIG. 7 is a schematic structural diagram of a terminal device according to Embodiment 6, as shown in FIG. Terminal equipment includes:

The receiving module 21 is configured to receive a handover command message sent by the source base station, where the handover command message includes first unlicensed transmission configuration information, where the first unlicensed transmission configuration information includes: the terminal device and the target base station Performing information of the first unlicensed transmission resource used by the unlicensed transmission and configuration information of the first uplink air interface transmission parameter;

The sending module 22 is configured to send an unlicensed service to the target base station according to the first unlicensed transmission configuration information.

Optionally, the handover command message includes: a timing advance of the terminal device at the target base station, where the timing advance is determined by the source base station or the target base station. The sending module 22 is specifically configured to: send the unlicensed service to the target base station according to the first unlicensed transmission configuration information and the timing advance.

Optionally, the handover command message includes: an uplink synchronization resource of the target base station. Correspondingly, the sending module 22 is further configured to send a signal on an uplink synchronization resource of the target base station, where the receiving module 21 is further configured to receive a time advance of the terminal device that is sent by the target base station at the target base station. The timing advance of the terminal device at the target base station is determined by the target base station according to a signal sent by the terminal device on an uplink synchronization resource of the target base station. The sending module 22 sends an unlicensed service to the target base station according to the first unlicensed transmission configuration information, specifically, according to the first unlicensed transmission configuration information and the time advance of the terminal device at the target base station. And send an unauthorized service to the target base station.

FIG. 8 is a schematic structural diagram of a target base station according to Embodiment 7. As shown in FIG. 8, the target base station provided in this embodiment includes:

The receiving module 31 is configured to receive a handover request message sent by the source base station, where the handover request message includes handover type information, where the handover type information is used to indicate that the terminal device supports unauthorized transmission, and the non-authorized service of the terminal device Characteristic

The processing module 32 is configured to determine, according to the characteristics of the unlicensed service, the first unlicensed transmission configuration information, where the first unlicensed transmission configuration information includes: the terminal device and the target base station perform unauthorized transmission use. Information of the first unlicensed transmission resource and configuration information of the first uplink air interface transmission parameter;

The sending module 33 is configured to send a handover response to the source base station, where the handover response includes the first unlicensed transmission configuration information.

Optionally, the handover request further includes an RSRP of the target base station measured by the terminal device, where The switching response further includes a timing advance of the terminal device at the target base station, and the processing module 32 is further configured to: determine, according to the RSRP of the target base station measured by the terminal device, the terminal The timing advance of the device at the target base station.

FIG. 9 is a schematic structural diagram of a source base station according to Embodiment 8. As shown in FIG. 9, the source base station 400 provided in this embodiment includes: a processor 41, a memory 42, a receiver 43, and a transmitter 44. The receiver 43 and the transmitter 44 are connected and communicated to the processor 41 via a bus, the memory 42 is for storing computer execution instructions, and the processor 41 is configured to execute the computer to execute instructions to cause the source base station 400. Performing the steps performed by the source base station in the methods provided in Embodiments 1 through 4, specifically:

The transmitter 44 is configured to send a handover request message to the target base station, where the handover request message includes handover type information, where the handover type information is used to indicate that the terminal device supports unauthorized transmission, and the unlicensed service of the terminal device characteristic;

The receiver 43 is configured to receive a handover response sent by the target base station, where the handover response includes first unlicensed transmission configuration information, where the first unlicensed transmission configuration information includes: the terminal device performs non-targeting with the target base station Authorizing the information of the first unlicensed transmission resource and the configuration information of the first uplink air interface transmission parameter, where the information of the first unlicensed transmission resource and the configuration information of the first uplink air interface transmission parameter are the target base station Determined according to characteristics of the unauthorized service;

The transmitter 44 is further configured to send a handover command message to the terminal device, where the handover command message includes the first unlicensed transmission configuration information.

Optionally, the handover response further includes a transmit power of the pilot signal of the target base station, where the handover command message further includes a timing advance of the terminal device at the target base station, and the processor 41 uses And determining, according to a transmit power of the pilot signal of the target base station, a timing advance of the terminal device at the target base station.

Optionally, the handover request message further includes second unlicensed transmission configuration information, where the second unlicensed transmission configuration information includes: a second non-authorization of the terminal device and the source base station for unauthorized transmission use. Pass The information of the transmission resource and the configuration information of the second uplink air interface transmission parameter. Further, the handover request message further includes a BSR of the unlicensed service of the terminal device.

FIG. 10 is a schematic structural diagram of a terminal device according to Embodiment 9. As shown in FIG. 10, the terminal device 500 provided in this embodiment includes: a processor 51, a memory 52, a receiver 53, and a transmitter 54, wherein the memory 52, The receiver 53 and the transmitter 54 are connected and communicated with the processor 51 via a bus, the memory 52 is for storing computer execution instructions, and the processor 51 is configured to execute the computer to execute instructions to enable the terminal device The steps performed by the terminal device in the method provided by Embodiment 1 to Embodiment 4 are performed, specifically:

The receiver 53 is configured to receive a handover command message sent by the source base station, where the handover command message includes first unlicensed transmission configuration information, where the first unlicensed transmission configuration information includes: the terminal device and the target base station Information about the first unlicensed transmission resource used for unauthorized transmission and configuration information of the first uplink air interface transmission parameter

The transmitter 54 is configured to send an unlicensed service to the target base station according to the first unlicensed transmission configuration information.

Optionally, the handover command message includes: a timing advance of the terminal device at the target base station, where the timing advance is determined by the source base station or the target base station; the transmitter 54 is specific And configured to: send an unauthorized service to the target base station according to the first unlicensed transmission configuration information and the timing advance.

Optionally, the handover command message includes: an uplink synchronization resource of the target base station; the transmitter 54 is further configured to send a signal on an uplink synchronization resource of the target base station; the receiver 53 further And receiving, by the target base station, a timing advance of the terminal device at the target base station, where the timing advance of the target device is that the target base station is configured according to the terminal device on the uplink synchronization resource of the target base station. The transmitter 54 determines that the unlicensed service is sent to the target base station according to the first unlicensed transmission configuration information, specifically, according to the first unlicensed transmission configuration information and the terminal device. An unlicensed service is sent to the target base station at a timing advance of the target base station.

11 is a schematic structural diagram of a target base station according to Embodiment 10. As shown in FIG. 11, the target base station 600 provided in this embodiment includes: a processor 61, a memory 62, a receiver 63, and a transmitter 64. The receiver 63 and the transmitter 64 are connected and communicated with the processor 61 via a bus, and the memory 62 is used for storing The storage computer executes the instructions, and the processor 61 is configured to execute the computer to execute the instructions, so that the target base station 600 performs the steps performed by the terminal device in the methods provided in the first embodiment to the fourth embodiment, specifically:

The receiver 63 is configured to receive a handover request message sent by the source base station, where the handover request message includes handover type information, where the handover type information is used to indicate that the terminal device supports unauthorized transmission, and the non-authorized service of the terminal device Characteristic

The processor 61 is configured to determine, according to the characteristics of the unlicensed service, the first unlicensed transmission configuration information, where the first unlicensed transmission configuration information includes: the terminal device performs unauthorized transmission with the target base station. Information of the first unlicensed transmission resource and configuration information of the first uplink air interface transmission parameter;

The transmitter 64 is configured to send a handover response to the source base station, where the handover response includes the first unlicensed transmission configuration information.

Optionally, the handover request further includes an RSRP of the target base station measured by the terminal device, where the handover response further includes a timing advance of the terminal device at the target base station, where the processor 61. The method further includes: determining, according to the RSRP of the target base station measured by the terminal device, a timing advance of the terminal device at the target base station.

It will be understood that the processor in the present application may be a central processing unit (CPU), a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic. Device, transistor logic device, hardware component, or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure. The processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like.

The bus described in this application may be an Industry Standard Architecture (ISA) bus, a Peripheral Component (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, the bus in the drawings of the present application is not limited to only one bus or one type of bus.

In the several embodiments provided by the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative, for example, the unit The division is only for one logical function division. Actual implementation may have another division manner. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment 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 hardware plus software functional units.

The above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium. The above software functional unit is stored in a storage medium and includes a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (English: processor) to perform the embodiments of the present application. Part of the steps of the method. The foregoing storage medium includes: a U disk, a mobile hard disk, a read only memory (English: Read-Only Memory, abbreviated as: ROM), a random access memory (English: Random Access Memory, abbreviated as: RAM), a magnetic disk or an optical disk, and the like. A variety of media that can store program code.

Claims

A cell handover method for unlicensed uplink transmission, comprising:

The source base station sends a handover request message to the target base station, where the handover request message includes handover type information, where the handover type information is used to indicate that the terminal device supports unauthorized transmission, and characteristics of the unlicensed service of the terminal device;

The source base station receives a handover response sent by the target base station, where the handover response includes first unlicensed transmission configuration information, where the first unlicensed transmission configuration information includes: the terminal device performs unauthorized transmission with the target base station. The information of the first unlicensed transmission resource and the configuration information of the first uplink air interface transmission parameter, where the information of the first unlicensed transmission resource and the configuration information of the first uplink air interface transmission parameter are Determining the characteristics of the non-authorized service;

The source base station sends a handover command message to the terminal device, where the handover command message includes the first unlicensed transmission configuration information.
The method according to claim 1, wherein the handover response further includes a transmission power of a pilot signal of the target base station, and the handover command message further includes the terminal device at the target base station. The timing advance, the method further includes:

The source base station determines a timing advance of the terminal device at the target base station according to a transmit power of a pilot signal of the target base station.
The method according to claim 1, wherein the handover response further includes a timing advance of the terminal device at the target base station.
The method according to claim 1, wherein the handover response and the handover command message further include an uplink synchronization resource of the target base station.
The method according to any one of claims 1-4, wherein the handover request message further includes second unlicensed transmission configuration information, where the second unlicensed transmission configuration information comprises: the terminal device and And the source base station performs information about the second unlicensed transmission resource used by the unlicensed transmission and configuration information of the second uplink air interface transmission parameter.
The method according to claim 5, wherein the handover request message further includes a buffer status report BSR of the unlicensed service of the terminal device.
A cell handover method for unlicensed uplink transmission, comprising:

The terminal device receives the handover command message sent by the source base station, where the handover command message includes the first unlicensed transmission configuration information, where the first unlicensed transmission configuration information includes: the terminal device performs unauthorized transmission with the target base station. The information of the first unlicensed transmission resource used and the configuration information of the first uplink air interface transmission parameter;

The terminal device sends an unauthorized service to the target base station according to the first unlicensed transmission configuration information.
The method according to claim 7, wherein the handover command message includes: a timing advance of the terminal device at the target base station, the timing advance by the source base station or the target base station determine;

The terminal device sends the unlicensed service to the target base station according to the first unlicensed transmission configuration information, including:

The terminal device sends an unauthorized service to the target base station according to the first unlicensed transmission configuration information and the timing advance.
The method according to claim 7, wherein the handover command message includes: an uplink synchronization resource of the target base station;

Before the terminal device sends the non-authorized service to the target base station according to the first unlicensed transmission configuration information, the method further includes:

The terminal device sends a signal on an uplink synchronization resource of the target base station;

Receiving, by the terminal device, a timing advance of the terminal device that is sent by the target base station in the target base station, where the time advance of the target device is an uplink synchronization of the target base station according to the terminal device at the target base station The signal sent on the resource is determined;

The terminal device sends the unlicensed service to the target base station according to the first unlicensed transmission configuration information, including:

The terminal device sends an unauthorized service to the target base station according to the first unlicensed transmission configuration information and a timing advance of the terminal device at the target base station.
A cell handover method for unlicensed uplink transmission, comprising:

The target base station receives a handover request message sent by the source base station, where the handover request message includes handover type information, where the handover type information is used to indicate that the terminal device supports unauthorized transmission, and characteristics of the unlicensed service of the terminal device;

The target base station determines the first unlicensed transmission configuration information according to the characteristics of the unlicensed service, where the first unlicensed transmission configuration information includes: the first unlicensed transmission use by the terminal device and the target base station Information of the unlicensed transmission resource and configuration information of the first uplink air interface transmission parameter;

The target base station sends a handover response to the source base station, where the handover response includes the first unlicensed transmission configuration information.
The method according to claim 10, wherein the handover request further includes an RSRP of the target base station measured by the terminal device, and the handover response further includes the terminal device at the target base station. The amount of time advancement, the method further includes:

Determining, by the target base station, a timing advance of the terminal device at the target base station according to the RSRP of the target base station measured by the terminal device.
The method according to claim 10, wherein the handover response further comprises a transmission power of a pilot signal of the target base station or an uplink synchronization resource of the target base station.
The method according to any one of claims 10 to 12, wherein the handover request message further includes second unlicensed transmission configuration information, where the second unlicensed transmission configuration information includes: the terminal device and And the source base station performs information about the second unlicensed transmission resource used by the unlicensed transmission and configuration information of the second uplink air interface transmission parameter.
The method according to claim 13, wherein the handover request message further includes a buffer status report BSR of the unlicensed service of the terminal device.
The method according to any one of claims 1 to 14, wherein the first uplink air interface transmission parameter comprises an uplink waveform, a multiple access mode, a modulation and coding mode, a radio frame structure, a power control related parameter, and a subcarrier spacing. And at least one of the cyclic prefix CP lengths.
The method according to claim 15, wherein said uplink waveform comprises single carrier discrete Fourier transform spread spectrum orthogonal frequency division multiplexing DFT-S-OFDM or multicarrier cyclic prefix orthogonal frequency division multiplexing CP-OFDM; the multiple access mode includes orthogonal frequency division multiple access OFDMA or non-orthogonal multiple access (NOMA); the radio frame structure includes a demodulation reference signal DMRS configuration; the power control related parameter includes an uplink maximum transmit power, The desired received power level, path loss compensation factor, or power adjustment amount of the base station.
A source base station, comprising:

And a transmitter, configured to send a handover request message to the target base station, where the handover request message includes handover type information, where the handover type information is used to indicate that the terminal device supports unauthorized transmission, and characteristics of the unlicensed service of the terminal device ;

a receiver, configured to receive a handover response sent by the target base station, where the handover response includes first unlicensed transmission configuration information, where the first unlicensed transmission configuration information includes: the terminal device and the target base station are not authorized Transmitting the information of the first unlicensed transmission resource and the configuration information of the first uplink air interface transmission parameter, where the information of the first unlicensed transmission resource and the configuration information of the first uplink air interface transmission parameter are Determining the characteristics of the unauthorized service;

The transmitter is further configured to send a handover command message to the terminal device, where the handover command message includes the first unlicensed transmission configuration information.
The source base station according to claim 17, wherein the handover response further includes a transmission power of a pilot signal of the target base station, and the handover command message further includes the terminal device at the target base station. The time base, the source base station further includes:

And a processor, configured to determine, according to a transmit power of the pilot signal of the target base station, a timing advance of the terminal device at the target base station.
The source base station according to claim 17, wherein the handover response further includes a timing advance of the terminal device at the target base station.
The source base station according to claim 17, wherein the handover response and the handover command message further include an uplink synchronization resource of the target base station.
A terminal device, comprising:

a receiver, configured to receive a handover command message sent by the source base station, where the handover command message includes first unlicensed transmission configuration information, where the first unlicensed transmission configuration information includes: the terminal device performs with the target base station Information of the first unlicensed transmission resource used by the unlicensed transmission and configuration information of the first uplink air interface transmission parameter

And a transmitter, configured to send an unlicensed service to the target base station according to the first unlicensed transmission configuration information.
The terminal device according to claim 21, wherein the handover command message includes: a timing advance of the terminal device at the target base station, the time advance amount being used by the source base station or the target The base station determines;

The transmitter is specifically configured to: send an unlicensed service to the target base station according to the first unlicensed transmission configuration information and the timing advance.
The terminal device according to claim 21, wherein the handover command message includes: an uplink synchronization resource of the target base station;

The transmitter is further configured to send a signal on an uplink synchronization resource of the target base station;

The receiver is further configured to receive a timing advance of the terminal device that is sent by the target base station at the target base station, where a timing advance of the target device is that the target base station is in the target according to the terminal device Determining a signal transmitted on an uplink synchronization resource of the base station;

The transmitter sends an unlicensed service to the target base station according to the first unlicensed transmission configuration information, specifically, according to the first unlicensed transmission configuration information and the time advance of the terminal device at the target base station. Sending an unauthorized service to the target base station.
A target base station, comprising:

a receiver, configured to receive a handover request message sent by the source base station, where the handover request message includes handover type information, where the handover type information is used to indicate that the terminal device supports unauthorized transmission, and the unlicensed service of the terminal device characteristic;

a processor, configured to determine, according to characteristics of the unlicensed service, first unlicensed transmission configuration information, where the first unlicensed transmission configuration information includes: an unlicensed transmission used by the terminal device and the target base station Information about an unlicensed transmission resource and configuration information of a first uplink air interface transmission parameter;

And a transmitter, configured to send a handover response to the source base station, where the handover response includes the first unlicensed transmission configuration information.
The target base station according to claim 24, wherein the handover request further includes an RSRP of the target base station measured by the terminal device, and the handover response further includes the terminal device at the target The timing advance of the base station, the processor is also used to:

Determining, according to the RSRP of the target base station measured by the terminal device, a timing advance of the terminal device at the target base station.
The target base station according to claim 24, wherein the handover response further includes a transmission power of a pilot signal of the target base station or an uplink synchronization resource of the target base station.
The source base station according to any one of claims 17 to 20, wherein the handover request message further includes second unlicensed transmission configuration information, where the The second unlicensed transmission configuration information includes: information about the second unlicensed transmission resource used by the terminal device and the source base station for unauthorized transmission, and configuration information of the second uplink air interface transmission parameter.
The source base station or the target base station according to claim 27, wherein the handover request message further includes a buffer status report BSR of the unlicensed service of the terminal device.
The source base station according to any one of claims 17 to 20, wherein the first uplink air interface transmission parameter is the target base station according to any one of the preceding claims. The method includes at least one of an uplink waveform, a multiple access mode, a modulation and coding mode, a radio frame structure, a power control related parameter, a subcarrier interval, and a cyclic prefix CP length.
The source base station, target base station or terminal device according to claim 29, wherein the uplink waveform comprises a single carrier discrete Fourier transform spread spectrum orthogonal frequency division multiplexing DFT-S-OFDM or a multi-carrier cycle Prefix Orthogonal Frequency Division Multiplexing (CP-OFDM); the multiple access mode includes orthogonal frequency division multiple access OFDMA or non-orthogonal multiple access (NOMA); the radio frame structure includes a demodulation reference signal DMRS configuration; The parameters include the maximum uplink transmit power, the desired receive power level of the base station, the path loss compensation factor, or the power adjustment amount.