WO2016177137A1

WO2016177137A1 - Data transmission method and device

Info

Publication number: WO2016177137A1
Application number: PCT/CN2016/076734
Authority: WO
Inventors: 陈中明
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-07-15
Filing date: 2016-03-18
Publication date: 2016-11-10
Also published as: CN106714295A; CN106714295B

Abstract

A data transmission method, comprising: upon receipt of data scheduling information transmitted from a base station, entering, by a UE, an uplink synchronization state, and activating an uplink time alignment timer (TAT) at the subframe in which the data scheduling information is received, wherein the data scheduling information is configured to schedule the UE to transmit data with a secondary cell, and the secondary cell uses an unlicensed carrier and needs to obtain resources via competition; transmitting, by the UE, data with the secondary cell according to the data scheduling information. By the above solution, the present invention can enable a UE to rapidly enter the synchronization state and transmit data without performing a random access process, effectively manage the synchronization state and improve a utilization rate of unlicensed carrier resources.

Description

Data transmission method and device

Technical field

The present application relates to, but is not limited to, a wireless communication technology, and more particularly to a data transmission method and apparatus.

Background technique

In the Long Term Evolution (LTE) system, in order to implement and maintain uplink synchronization between a User Equipment (UE) and a base station, the base station sends a timing advance according to a transmission delay between the base station and each UE (Timing Advance, TA) For each UE, the UE advances the timing of each uplink transmission according to the timing advance sent by the base station, thereby compensating for the transmission delay of the UE to the base station, so that the uplink signals of different UEs arrive at the base station within the receiving window of the base station. The uplink synchronization is obtained by the UE by performing a random access procedure, and the UE acquires the TA sent by the base station, and the TA is mainly used by the UE to determine the uplink transmission data moment. Since the cell in the LTE system has only one carrier, there is only one TA. The general process of the UE data receiving is: the UE receives the scheduling information sent by the base station, and the scheduling information is sent by using a Physical Downlink Control Channel (PDCCH), including time-frequency domain information of the scheduling resource, and the data block is in the physical downlink shared channel. The specific address of the Physical Downlink Shared Channel (PDSCH), the UE receives the data on the PDSCH according to the scheduling information. The general process of the UE data transmission is: the UE receives the scheduling information sent by the base station, the scheduling information is sent by using the PDCCH, and includes the time-frequency domain information of the scheduling resource, and the specific address of the PDSCH that can send the data block, and the UE is in the PDSCH according to the scheduling information. Send data on.

In order to maintain the uplink synchronization between the UE and the base station, the base station configures a Time Alignment Timer (TAT) for the UE. If the UE can receive the TA sent by the base station to the UE before the TAT expires, the UE is considered to be The uplink synchronization is maintained between the base stations; otherwise, the UE is considered to have lost uplink synchronization. In the unsynchronized state or the out-of-synchronization state, the UE obtains uplink synchronization with the base station by using a random access procedure, and after receiving the random access response (RAR) sent by the base station, the UE starts the TAT, and according to the base station The timing of the uplink uplink transmission carried by the TA carried in the random access response. After the UE obtains the uplink synchronization with the base station, during the TAT operation, if the TA command (Time Alignment Command) sent by the base station to the UE is received, the TAT is restarted. And use the TA carried in the TA command to advance the uplink transmission time, and consider that the UE still maintains uplink synchronization with the base station; if the UE does not receive the TA command during the TAT operation, that is, the TAT times out, the UE and the base station are considered to have lost uplink synchronization, and need to be deleted. Dynamically allocate all the uplink and downlink resources of the UE, and clear all the Hybrid Automatic Repeat Request Buffer (HARQ buffer) data to be sent, and notify the Radio Resource Control (RRC) sublayer. The static/semi-static uplink physical resources allocated to the UE are released, and if there is uplink data to be transmitted, the UE needs to perform random access first to regain uplink synchronization.

The Long Term Evolution Advance (LTE-A) system proposes Carrier Aggregation (CA) to provide mobile users with higher data rates. In LTE, the maximum downlink transmission bandwidth supported by the system is 20 MHz. Carrier aggregation is to aggregate two or more component carriers (CCs) to support a transmission bandwidth greater than 20 MHz and no more than 100 MHz. The LTE-A UE with carrier aggregation capability can transmit and receive data on multiple component carriers at the same time. In the LTE-A system, after the UE enters the connected state, the UE can simultaneously perform the same with the source base station through multiple component carriers (also referred to as a serving cell, including a primary cell (Pcell) and a secondary cell (Scell)). Communication. In the initial stage of carrier aggregation, the scenario is limited and the number of serving cells is relatively small, so one TA is sufficient. In the subsequent stage of carrier aggregation, the number of component carriers to be aggregated increases and the scenario is relaxed. A TA is not applicable, so multiple TAs are introduced. In the subsequent phase of carrier aggregation (ie, Rel-11), the number of Scells will increase due to the increase in data volume. If the number of Scells is increased to four, the scenario will be relaxed, such as supporting the Radio Radio Head (RRH). TA does not solve the problem, so multiple TAs are introduced. For the convenience of management, the serving cells using the same TA are classified into one TA group. At this time, the TA group including the Pcell is pTAG (primary TA group), and the TA group not including the Pcell is sTAG (secondary TA group).

With the rapid growth of data services, the licensed spectrum will not be able to withstand such a large amount of data in the near future. Therefore, operators consider deploying LTE in unlicensed carriers and sharing the licensed carriers through unlicensed spectrum. Data traffic. Unlicensed carrier (exempted spectrum) refers to the spectrum (or carrier) that can be used directly without authorization, subject to the relevant regulations (radio control) of government agencies (eg, National Radio Regulatory Commission). For example, a microwave oven, Remote control toy airplanes, wireless mice, wireless keyboards, and high-fidelity wireless (Wireless Fidelity, WiFi) use unlicensed carriers. In some cases, unlicensed carriers need to compete to be used. If the base station (including the WiFi access point) does not compete for resources, the unlicensed carrier cannot be used. The unlicensed carrier and the authorized carrier can be used in the form of carrier aggregation or dual-connection. The unlicensed carrier is generally used as a supplement to the data transmission, that is, the authorized carrier is used as the Pcell, and the unlicensed carrier is used as the Scell.

Currently, in a case where the secondary serving cell uses an unlicensed carrier and the TAs of other serving cells do not belong to one TA group, when the UE needs to transmit data, the uplink or the base station is out of synchronization or not synchronized, and the UE needs to pass the random access procedure. The uplink synchronization with the base station is obtained, and the data can be transmitted only after entering the uplink synchronization state. The resources that are competed on the unlicensed carrier are first used for uplink synchronization, which is undoubtedly very wasteful.

Summary of the invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

The embodiments of the present invention provide a data transmission method and device, which enable a UE to quickly enter a synchronization state and perform data transmission without performing a random access procedure, thereby improving utilization of unlicensed carrier resources.

The embodiment of the invention provides a data transmission method, including:

After receiving the data scheduling information sent by the base station, the user equipment (UE) enters an uplink synchronization state, and starts an uplink synchronization timer (TAT) in a subframe that receives the data scheduling information, where the data scheduling information is used by the scheduling device. The UE transmits data in the secondary serving cell; wherein the secondary serving cell uses an unlicensed carrier, and needs to acquire resources through a contention manner;

The UE transmits data in the secondary serving cell according to the data scheduling information.

Optionally, the data scheduling information is the first data scheduling information that is received by the UE in an uplink out-of-synchronization state; the data scheduling information includes: scheduling information that is scheduled to receive and/or send data by the UE.

Optionally, the method further includes:

When the current serving cell cannot meet the service requirement of the UE, and the base station adds the secondary serving cell to the UE according to the measurement report of the UE, the UE configures the location according to the configuration information of the secondary serving cell. Said secondary service community.

Optionally, the method further includes:

After the UE is in the uplink synchronization state and the base station uses the resources of the secondary serving cell, the UE maintains the uplink synchronization state after receiving the data scheduling information sent by the base station, and receives the The subframe of the data scheduling information restarts the TAT.

Optionally, the method further includes:

The UE initiates a resource competition process of the secondary serving cell according to the requirement of the UE traffic volume, and acquires resource information of the secondary serving cell; or the UE according to the requirement of the UE traffic volume under the indication of the base station Initiating a resource competition process of the secondary serving cell, and acquiring resource information of the secondary serving cell;

And after the UE contends to the resource of the secondary serving cell, sending a notification message to the base station, where the notification message includes resource information of the secondary serving cell.

Optionally, the resource information of the secondary serving cell includes at least: frequency information of the unlicensed carrier that is contending, and time information.

The embodiment of the invention further provides a data transmission method, including:

When the current serving cell cannot meet the service requirement of the UE, the base station adds a secondary serving cell to the UE according to the measurement report of the UE, where the secondary serving cell uses an unlicensed carrier, and needs to acquire resources through a contention manner;

Obtaining, by the base station, resource information of the secondary serving cell according to a preset manner;

The base station sends data scheduling information to the UE according to the measurement report of the UE and the obtained resource information of the secondary serving cell, to directly start scheduling the UE to perform data transmission in the secondary serving cell.

Optionally, the foregoing method further includes:

After the UE is in an uplink synchronization state, and the base station uses the resources of the secondary serving cell, the base station performs the step of acquiring, by the base station, the resource information of the secondary serving cell according to a preset manner, and reacquiring the Resource information of the secondary service cell.

Optionally, the acquiring, by the base station, the resource information of the secondary serving cell according to a preset manner, including:

The base station initiates a resource competition process of the secondary serving cell according to the requirement of the UE traffic volume, and acquires resource information of the secondary serving cell.

Receiving a notification message sent by the UE, where the notification message includes resource information of the secondary serving cell that the UE competes in the resource competition process of the secondary serving cell according to the requirement of the UE traffic volume.

Determining, by the base station, that the UE initiates a resource competition process of the secondary serving cell according to the requirement of the UE traffic volume, and acquires resource information of the secondary serving cell;

Receiving a notification message sent by the UE, where the notification message includes resource information of a secondary serving cell that the UE contends.

An embodiment of the present invention provides a user equipment (UE), including:

The receiving unit is configured to: when the UE receives the data scheduling information sent by the base station, enter an uplink synchronization state, and start an uplink synchronization timer (TAT) in the subframe that receives the data scheduling information, where the data scheduling information The method is used to schedule the UE to transmit data in a secondary serving cell, and the secondary serving cell uses an unlicensed carrier, and needs to acquire resources through a contention manner;

The transmission unit is configured to: transmit data in the secondary serving cell according to the data scheduling information.

Optionally, the UE further includes:

a configuration unit, configured to: when the current serving cell cannot meet the service requirement of the UE, and the base station adds the secondary serving cell to the UE according to the measurement report of the UE, according to the configuration of the secondary serving cell Information configuring the secondary serving cell;

Optionally, the UE further includes:

a competing unit, configured to: initiate a resource contention process of the secondary serving cell according to the requirement of the UE traffic volume, acquire resource information of the secondary serving cell, or, under the indication of the base station, Initiating a resource competition process of the secondary serving cell according to the requirement of the UE traffic, and acquiring resource information of the secondary serving cell;

The notification unit is configured to: after the UE contends to the resource of the secondary serving cell, send a notification message to the base station, where the notification message includes resource information of the secondary serving cell.

An embodiment of the present invention provides a base station, including:

a configuration unit, configured to: when the current serving cell cannot meet the service requirement of the user equipment (UE), add a secondary serving cell to the UE according to the measurement report of the UE; where the secondary serving cell uses an unlicensed carrier Need to acquire resources through competition;

The acquiring unit is configured to: obtain resource information of the secondary serving cell according to a preset manner;

And a scheduling unit, configured to: send data scheduling information to the UE according to the measurement report of the UE and the obtained resource information of the secondary serving cell, to directly start scheduling, for the UE to perform data transmission in the secondary serving cell .

Optionally, the obtaining unit is configured to:

Initiating a resource competition process of the secondary serving cell according to the requirement of the UE traffic volume, and acquiring resource information of the secondary serving cell; or

Receiving the notification message sent by the UE, where the notification message includes resource information of the secondary serving cell that the UE competes in the resource competition process of the secondary serving cell according to the requirement of the UE traffic volume.

Optionally, the obtaining unit includes:

And the indicating unit is configured to: instruct the UE to initiate the resource contention process of the secondary serving cell to obtain resource information of the secondary serving cell according to the requirement of the UE traffic volume;

The receiving unit is configured to: receive the notification message sent by the UE, where the notification message includes resource information of the secondary serving cell.

In addition, an embodiment of the present invention further provides a computer readable storage medium storing computer executable instructions, which implement a data transmission method on the UE side when the computer executable instructions are executed.

In addition, an embodiment of the present invention further provides a computer readable storage medium, where a computer can be stored. Executing an instruction to implement a data transmission method on the base station side when the computer executable instructions are executed.

The data transmission method and device provided by the embodiment of the present invention include: when the UE receives the data scheduling information sent by the base station, enters an uplink synchronization state, and starts an uplink synchronization timer in a subframe in which the data scheduling information is received ( The TAT), the data scheduling information is used to schedule the UE to transmit data in the secondary serving cell, where the secondary serving cell uses an unlicensed carrier, and needs to acquire resources through a contention manner; the UE according to the data scheduling information Transmitting data in the secondary serving cell. Through the foregoing solution, the UE can quickly enter the synchronization state and perform data transmission without performing a random access procedure, and can efficiently manage the synchronization state and improve the utilization of the unlicensed carrier resources.

Other features and advantages of the present application will be set forth in the description which follows. The objectives and other advantages of the present invention can be realized and obtained by the structure of the invention.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

The drawings are used to provide a further understanding of the technical solutions of the present application, and constitute a part of the specification, which is used together with the embodiments of the present application to explain the technical solutions of the present application, and does not constitute a limitation of the technical solutions of the present application.

1 is a schematic flowchart of a data transmission method according to an embodiment of the present invention;

2 is another schematic flowchart of a data transmission method according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a user equipment according to an embodiment of the present disclosure;

4 is a schematic structural diagram of a base station according to an embodiment of the present invention;

FIG. 5 is a schematic flowchart of Embodiment 1 of the present invention; FIG.

6 is a schematic flowchart of Embodiment 2 of the present invention;

FIG. 7 is a schematic flowchart of Embodiment 3 of the present invention.

Embodiments of the invention

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that In the case of no conflict, the embodiments in the present application and the features in the embodiments may be arbitrarily combined with each other.

The steps illustrated in the flowchart of the figures may be executed in a computer system such as a set of computer executable instructions. Also, although logical sequences are shown in the flowcharts, in some cases the steps shown or described may be performed in a different order than the ones described herein.

The technical solution provided by the embodiment of the present invention can be used in a Frequency Division Duplex (FDD) mode, and can also be used in a Time Division Duplex (TDD) mode. In the technical solution provided by the embodiment of the present invention, for a secondary serving cell that uses an unlicensed carrier, since there is an activation/deactivation mechanism, it needs to be activated before it can be scheduled. In addition, the primary serving cell and the secondary serving cell in the embodiment of the present invention may perform carrier aggregation, and may also perform aggregation by means of dual connectivity.

The embodiment of the invention provides a data transmission method. As shown in FIG. 1 , the method includes the following steps:

Step 104: After receiving the data scheduling information sent by the base station, the user equipment (UE) enters an uplink synchronization state, and starts an uplink synchronization timer (TAT) in a subframe that receives the data scheduling information, where the data scheduling information is used. Dispatching the UE to transmit data in the secondary serving cell; wherein the secondary serving cell uses an unlicensed carrier, and needs to acquire resources through a contention manner;

Step 105: The UE transmits data in the secondary serving cell according to the data scheduling information.

Optionally, before the step 104, the method may further include:

Step 101: When the current serving cell cannot meet the service requirement of the UE, and the base station adds the secondary serving cell to the UE according to the measurement report of the UE, the UE is configured according to the secondary serving cell. Information configuring the secondary serving cell;

Step 102: The base station acquires resource information of the secondary serving cell according to a preset manner.

Step 103: The base station sends data scheduling information to the UE according to the measurement report of the UE and the obtained resource information of the secondary serving cell, to directly start scheduling the UE to perform data transmission in the secondary serving cell. .

Optionally, after step 105, the method further includes:

Step 106: After the UE is in the uplink synchronization state, and the base station uses the resources of the secondary serving cell, the base station performs the step of acquiring, by the base station, the resource information of the secondary serving cell according to a preset manner. Obtaining resource information of the secondary serving cell;

Step 107: After receiving the data scheduling information sent by the base station, the UE maintains an uplink synchronization state, and restarts the TAT in a subframe that receives the data scheduling information.

Optionally, step 102 may include:

Optionally, step 102 may further include:

The UE initiates a resource competition process of the secondary serving cell according to the requirement of the UE traffic volume, and acquires resource information of the secondary serving cell;

Optionally, step 102 may further include:

The data transmission method provided by the embodiment of the present invention, when the UE receives the data scheduling information sent by the base station, enters an uplink synchronization state, and starts an uplink synchronization timer (TAT) in the subframe in which the data scheduling information is received, where the data is sent. The scheduling information is used to schedule the UE to transmit data in the secondary serving cell, where the secondary serving cell uses an unlicensed carrier, and needs to acquire resources in a contention manner; the UE is in the secondary serving cell according to the data scheduling information. transfer data. Through the foregoing solution, the UE can quickly enter the synchronization state and perform data transmission without performing a random access procedure, and can efficiently manage the synchronization state and improve the utilization of the unlicensed carrier resources.

The embodiment of the invention further provides a data transmission method. As shown in FIG. 2, the method includes the following steps:

Step 201: When the current serving cell cannot meet the service requirement of the UE, the base station adds a secondary serving cell to the UE according to the measurement report of the UE, where the secondary serving cell uses an unlicensed carrier, and needs to use a competitive manner. Access to resources;

Step 202: The base station acquires resource information of the secondary serving cell according to a preset manner.

Step 203: The base station sends data scheduling information to the UE according to the measurement report of the UE and the obtained resource information of the secondary serving cell, to directly start scheduling the UE to perform data transmission in the secondary serving cell.

The data scheduling information includes scheduling information that schedules the UE to receive and/or transmit data.

Optionally, the method further includes: after the UE is in an uplink synchronization state, and the base station uses the resources of the secondary serving cell, the base station performs, by the base station, acquiring the secondary service according to a preset manner. The step of resource information of the cell re-acquires resource information of the secondary serving cell.

Optionally, step 202 may include:

And receiving the notification message sent by the UE, where the notification message includes resource information of the secondary serving cell that the UE competes after the resource competition process of the secondary serving cell is initiated according to the requirement of the UE traffic volume.

Optionally, step 202 may include:

With the foregoing solution of the embodiment of the present invention, the UE can quickly enter the synchronization state and perform data transmission without performing a random access procedure, and can efficiently manage the synchronization state and improve the utilization of the unlicensed carrier resources.

An embodiment of the present invention provides a UE 10, as shown in FIG. 3, including:

The receiving unit 11 is configured to: when the UE receives the data scheduling information sent by the base station, enter an uplink synchronization state, and start an uplink synchronization timer (TAT) in the subframe that receives the data scheduling information, where the data scheduling The information is used to schedule the UE to transmit data in the secondary serving cell, and the secondary serving cell uses an unlicensed carrier, and needs to acquire resources through a contention manner;

The transmitting unit 12 is configured to: transmit data in the secondary serving cell according to the data scheduling information.

Optionally, as shown in FIG. 2, the UE 10 may further include:

The configuration unit 13 is configured to: when the current serving cell cannot meet the service requirement of the UE, and the base station adds the secondary serving cell to the UE according to the measurement report of the UE, the UE is configured according to the auxiliary The configuration information of the serving cell configures the secondary serving cell;

The competing unit 14 is configured to: initiate a resource contention process of the secondary serving cell according to the requirement of the UE traffic volume, acquire resource information of the secondary serving cell, or, according to the base station, The resource competition process of the secondary serving cell is initiated, and the resource information of the secondary serving cell is obtained;

The notification unit 15 is configured to: after the UE contends to the resources of the secondary serving cell, send a notification message to the base station, where the notification message includes resource information of the secondary serving cell.

This embodiment is used to implement the foregoing method embodiments. For the working process and working principle of each unit in this embodiment, refer to the description in the foregoing method embodiments, and details are not described herein again.

The user equipment provided by the embodiment of the present invention enters an uplink synchronization state after receiving the data scheduling information sent by the base station, and starts an uplink synchronization timer (TAT) in the subframe in which the data scheduling information is received, where the data scheduling is performed. The information is used to schedule the UE to transmit data in the secondary serving cell, where the secondary serving cell uses an unlicensed carrier, and needs to acquire resources in a contention manner; and the UE transmits the data in the secondary serving cell according to the data scheduling information. data. Through the above scheme, The UE does not need to perform a random access procedure, quickly enters a synchronization state and performs data transmission, and can efficiently manage the synchronization state and improve the utilization of unlicensed carrier resources.

The embodiment of the present invention provides a base station 20, as shown in FIG. 4, including:

The configuration unit 21 is configured to: when the current serving cell cannot meet the service requirement of the UE, the base station adds a secondary serving cell to the UE according to the measurement report of the UE; where the secondary serving cell uses an unlicensed carrier, Access to resources through competition;

The obtaining unit 22 is configured to: acquire resource information of the secondary serving cell according to a preset manner;

The scheduling unit 23 is configured to: according to the measurement report of the UE and the acquired resource information of the secondary serving cell, send data scheduling information to the UE, to directly start scheduling the UE to perform data in the secondary serving cell transmission.

Optionally, the obtaining unit 22 is configured to:

Receiving the notification message sent by the UE, where the notification message includes resource information of the secondary serving cell that the UE competes after initiating the resource competition process of the secondary serving cell according to the requirement of the UE traffic volume.

Optionally, the obtaining unit 22 may include:

The base station provided by the embodiment of the present invention, when the current serving cell cannot meet the service requirement of the UE, the base station adds a secondary serving cell to the UE according to the measurement report of the UE, where the secondary serving cell uses an unlicensed carrier. The UE needs to obtain the resource in a contention manner; the UE adds the secondary serving cell according to the configuration information of the secondary serving cell; the base station acquires resource information of the secondary serving cell according to a preset manner; UE measurement report and acquired The resource information of the secondary serving cell sends data scheduling information to the UE, to directly start scheduling the UE to perform data transmission in the secondary serving cell; and when the UE receives the data scheduling sent by the secondary serving cell After the information enters an uplink synchronization state, and an uplink synchronization timer (TAT) is started in a subframe in which the data scheduling information is received, the data scheduling information is used to schedule the UE to transmit data; and the UE is scheduled according to the data. Information transfer data. Through the foregoing solution, the UE can quickly enter the synchronization state and perform data transmission without performing a random access procedure, and can efficiently manage the synchronization state and improve the utilization of the unlicensed carrier resources.

The technical solutions provided by the embodiments of the present invention are described in detail below by way of specific embodiments.

Embodiment 1

In this embodiment, as shown in FIG. 5, the embodiment includes the following steps:

Step 1: The UE establishes a connection with the cell 1. The cell 1 is a current serving cell, for example, may be a primary serving cell. The base station configures multiple measurement tasks for the UE, for example, measuring multiple cells, and the UE performs measurement according to the measurement task, and performs measurement according to the measurement task. The configuration of the task is reported to the measurement report;

Step 2: The base station adds the cell 2 to the UE according to the measurement report of the UE, and the cell 2 and the cell 1 are not in a TA group, and the cell 2 is an unlicensed carrier, and the resource usage permission is acquired through the competition mode. 2 is a secondary service cell;

The UE receives the configuration information of the cell 2, and adds the cell 2;

Step 3: The base station initiates a resource competition process of the cell 2 according to the requirement of the UE traffic volume;

Step 4: After the base station contends to the resource of the cell 2, the base station decides to directly start scheduling the UE to perform data transmission and reception in the cell 2 according to the measurement report of the UE and the obtained resource information of the cell 2, and does not need to perform a random access process;

Step 5: The base station sends data scheduling information to the UE, to schedule the UE to send or receive data in the cell 2;

Step 6: After receiving the first data scheduling information of the cell 2, the UE starts the TAT in the subframe in which the first data scheduling information is received. The first data scheduling information may include: indicating that the UE receives and/or Scheduling information for sending data;

Step 7: The UE sends uplink data or receives downlink data according to the data scheduling information.

After the TAT times out, the UE enters the out-of-synchronization state and stops transmitting uplink data.

Embodiment 2

In this embodiment, as shown in FIG. 6, the embodiment includes the following steps:

Step 1: The UE is configured with the cell 1 and the cell 2. The cell 1 is the current serving cell, for example, the primary serving cell, the cell 2 is the secondary serving cell, the cell 2 and the cell 1 are different TA groups, and the UE is on the cell 2. The TAT is running, the resources preempted on the cell 2 are exhausted, and the base station configures multiple measurement tasks for the UE. The UE performs measurement according to the measurement task, and reports the measurement report according to the configuration of the measurement task.

Step 2: The base station initiates a resource competition process of the cell 2 according to the requirement of the UE traffic volume;

Step 3: After the base station contends to the resource of the cell 2, the base station decides to directly start scheduling the UE to perform data transmission and reception in the cell 2 according to the measurement report of the UE and the obtained resource information of the cell 2, and does not need to perform a random access procedure;

Step 4: The base station sends data scheduling information to the UE, to schedule the UE to send or receive data in the cell 2.

Step 5: After receiving the data scheduling information of the cell 2, the UE finds that the TAT of the cell 2 is running, and then restarts the TAT in the subframe that receives the scheduling information. The data scheduling information may include: indicating that the UE receives and/or Scheduling information for sending data;

Step 6: The UE sends uplink data or receives downlink data according to the data scheduling information.

Embodiment 3

In this embodiment, as shown in FIG. 7, the embodiment includes the following steps:

Step 1: The UE establishes a connection with the cell 1. The cell 1 is the current serving cell, for example, the primary serving cell. The base station configures multiple measurement tasks for the UE. The UE performs measurement according to the measurement task and reports the measurement according to the configuration of the measurement task. report;

In this step, the base station adds the cell 2 to the UE, and may include the identifier of the cell 2, and the phase. Information such as carrier frequency, bandwidth, channel configuration, and the like is sent to the UE.

Step 3: The UE receives the configuration information of the cell 2, and adds the cell 2;

The UE initiates a resource competition process of the cell 2 according to the demand of the traffic;

Step 4: The UE notifies the base station to perform the resource competition process of the cell 2 through the cell 1;

Step 5: The UE competes for the resources of the cell 2;

Step 6: The UE notifies the resource information of the cell 2 that the base station contends through the cell 1. The resource information of the cell 2 may include the frequency information and the time information of the contending resource. The time information may include at least one of the following: start time and end time. , the length of the resource duration;

Step 7: After receiving the resource information of the cell 2 that is contending, the base station starts scheduling the UE to perform data transmission and reception in the cell 2;

Step 8: After receiving the first data scheduling information of the cell 2, the UE starts the TAT in the subframe in which the first data scheduling information is received, and the first data scheduling information may be scheduling information for receiving or transmitting data, or only Limited to receiving scheduling information of data, or limited to scheduling information of transmitting data;

Step 9: The UE sends uplink data or receives downlink data according to the data scheduling information.

In the third step of the embodiment, the UE needs to compete for the unlicensed carrier resource, which may be determined by the UE, or may be notified by the base station to perform the process.

In addition, an embodiment of the present invention further provides a user equipment, including a processor and a memory, where the processor stores instructions executable by the processor, and when the instructions are executed by the processor, performs the functions of the module shown in FIG.

In addition, an embodiment of the present invention further provides a base station, including a processor and a memory, where the processor stores instructions executable by the processor, and when the instructions are executed by the processor, performs the functions of the module shown in FIG.

In addition, an embodiment of the present invention further provides a computer readable storage medium storing computer executable instructions, and when the computer executable instructions are executed, implementing a data transmission method on a base station side.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be performed by a program to instruct related hardware, such as a processor, which may be stored in a computer readable storage medium, such as a read only memory, disk or optical disk. Wait. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the above embodiment may be implemented in the form of hardware, for example, by implementing an integrated circuit to implement its corresponding function, or may be implemented in the form of a software function module, for example, executing a program stored in the memory by a processor. / instruction to achieve its corresponding function. This application is not limited to any specific combination of hardware and software.

The embodiments disclosed in the present application are as described above, but the description is only for the purpose of understanding the present application, and is not intended to limit the present application. Any modifications and changes in the form and details of the embodiments may be made by those skilled in the art without departing from the spirit and scope of the disclosure. The scope defined by the appended claims shall prevail.

Industrial applicability

The embodiments of the present invention provide a data transmission method and apparatus, which enable a UE to quickly enter a synchronization state and perform data transmission without performing a random access procedure, and can efficiently manage a synchronization state and improve utilization of unlicensed carrier resources.

Claims

A data transmission method includes:

After receiving the data scheduling information sent by the base station, the user equipment UE enters an uplink synchronization state, and starts an uplink synchronization timer TAT in a subframe that receives the data scheduling information, where the data scheduling information is used to schedule the UE to assist The serving cell transmits data; wherein the secondary serving cell uses an unlicensed carrier, and needs to acquire resources through a contention manner;

The UE transmits data in the secondary serving cell according to the data scheduling information.
The method according to claim 1, wherein the data scheduling information is a first data scheduling information received by the UE in an uplink out-of-synchronization state; the data scheduling information includes: scheduling the UE to receive and/or Or send scheduling information for the data.
The method according to claim 1, wherein the UE enters an uplink synchronization state after receiving the data scheduling information sent by the base station, and before the uplink synchronization timer TAT is started in the subframe in which the data scheduling information is received, the method Also includes:

When the current serving cell cannot meet the service requirement of the UE, and the base station adds the secondary serving cell to the UE according to the measurement report of the UE, the UE configures the location according to the configuration information of the secondary serving cell. Said secondary service community.
The method of claim 3, further comprising:

After the UE is in the uplink synchronization state and the base station uses the resources of the secondary serving cell, the UE maintains the uplink synchronization state after receiving the data scheduling information sent by the base station, and receives the The subframe of the data scheduling information restarts the TAT.
The method of claim 3 or 4, further comprising:

The UE initiates a resource competition process of the secondary serving cell according to the requirement of the UE traffic volume, and acquires resource information of the secondary serving cell; or the UE according to the requirement of the UE traffic volume under the indication of the base station Initiating a resource competition process of the secondary serving cell, and acquiring resource information of the secondary serving cell;

And after the UE contends to the resource of the secondary serving cell, sending a notification message to the base station, where the notification message includes resource information of the secondary serving cell.
The method according to claim 1, wherein the resource information of the secondary serving cell comprises at least: frequency information of the unlicensed carrier that is contending and time information.
A data transmission method includes:

When the current serving cell cannot meet the service requirement of the user equipment UE, the base station adds a secondary serving cell to the UE according to the measurement report of the UE, where the secondary serving cell uses an unlicensed carrier, and needs to obtain through a competitive manner. Resource

Obtaining, by the base station, resource information of the secondary serving cell according to a preset manner;

The base station sends data scheduling information to the UE according to the measurement report of the UE and the obtained resource information of the secondary serving cell, to directly start scheduling the UE to perform data transmission in the secondary serving cell.
The method of claim 7 further comprising:

After the UE is in an uplink synchronization state, and the base station uses the resources of the secondary serving cell, the base station performs the step of acquiring, by the base station, the resource information of the secondary serving cell according to a preset manner, and reacquiring the Resource information of the secondary service cell.
The method according to claim 7 or 8, wherein the acquiring, by the base station, the resource information of the secondary serving cell according to a preset manner includes:

The base station initiates a resource competition process of the secondary serving cell according to the requirement of the UE traffic volume, and acquires resource information of the secondary serving cell.
The method according to claim 7 or 8, wherein the acquiring, by the base station, the resource information of the secondary serving cell according to a preset manner includes:

Receiving a notification message sent by the UE, where the notification message includes resource information of the secondary serving cell that the UE competes in the resource competition process of the secondary serving cell according to the requirement of the UE traffic volume.
The method according to claim 7 or 8, wherein the acquiring, by the base station, the resource information of the secondary serving cell according to a preset manner includes:

Determining, by the base station, that the UE initiates a resource competition process of the secondary serving cell according to the requirement of the UE traffic volume, and acquires resource information of the secondary serving cell;

Receiving a notification message sent by the UE, where the notification message includes resource information of a secondary serving cell that the UE contends.
The method according to claim 7, wherein the resource information of the secondary serving cell includes at least: frequency information of the unlicensed carrier that is contending and time information.
A user equipment UE includes:

The receiving unit is configured to: when the UE receives the data scheduling information sent by the base station, enter an uplink synchronization state, and start an uplink synchronization timer TAT in the subframe that receives the data scheduling information, where the data scheduling information is used. Scheduling the UE to transmit data in the secondary serving cell, where the secondary serving cell uses an unlicensed carrier, and needs to obtain resources through a contention manner;

The transmission unit is configured to: transmit data in the secondary serving cell according to the data scheduling information.
The user equipment of claim 13, the UE further comprising:

a configuration unit, configured to: when the current serving cell cannot meet the service requirement of the UE, and the base station adds the secondary serving cell to the UE according to the measurement report of the UE, according to the configuration of the secondary serving cell The information configures the secondary serving cell.
The UE of claim 13, the UE further comprising:

a competing unit, configured to: initiate a resource contention process of the secondary serving cell according to the requirement of the UE traffic volume, acquire resource information of the secondary serving cell, or, according to the requirement of the base station, according to the requirement of the UE traffic volume Initiating a resource competition process of the secondary serving cell, and acquiring resource information of the secondary serving cell;

The notification unit is configured to: after the UE contends to the resource of the secondary serving cell, send a notification message to the base station, where the notification message includes resource information of the secondary serving cell.
A base station comprising:

a configuration unit, configured to: when the current serving cell cannot meet the service requirement of the user equipment UE, the base station adds a secondary serving cell to the UE according to the measurement report of the UE; where the secondary serving cell uses an unlicensed carrier, Need to acquire resources through competition;

The acquiring unit is configured to: obtain resource information of the secondary serving cell according to a preset manner;

And a scheduling unit, configured to: send data scheduling information to the UE according to the measurement report of the UE and the obtained resource information of the secondary serving cell, to directly start scheduling, for the UE to perform data transmission in the secondary serving cell .
The base station according to claim 16, wherein said obtaining unit is configured to:

Initiating a resource competition process of the secondary serving cell according to the requirement of the UE traffic volume, and acquiring resource information of the secondary serving cell; or

Receiving the notification message sent by the UE, where the notification message includes resource information of the secondary serving cell that the UE competes in the resource competition process of the secondary serving cell according to the requirement of the UE traffic volume.
The base station according to claim 16, wherein the obtaining unit comprises:

And the indicating unit is configured to: instruct the UE to initiate the resource contention process of the secondary serving cell to obtain resource information of the secondary serving cell according to the requirement of the UE traffic volume;

The receiving unit is configured to: receive the notification message sent by the UE, where the notification message includes resource information of the secondary serving cell.
A computer readable storage medium storing computer executable instructions that, when executed, implement the method of any one of claims 1 to 6.
A computer readable storage medium storing computer executable instructions that, when executed, implement the method of any one of claims 7 to 12.